JP2012017553A - Construction machinery - Google Patents

Abstract

PROBLEM TO BE SOLVED: To ensure a space for routing hydraulic hoses on a control valve support plate while both reducing the weight and enhancing the stiffness of the control valve support plate.SOLUTION: The control valve support plate 22 is formed using a corrugated sheet alternately arranged with convex portions protruding upward 22A, 22B, 22F, 22G and concave portions protruding downward 22C, 22D, 22E, and a group of control valves 24 is mounted on the convex portions 22A, 22B, 22F of the control valve support plate 22. In this way, the high stiffness of the control valve support plate 22 can be obtained with the effect of corrugation shape even if a thin plate is used as the control valve support plate 22. And by placing hose connection parts 26A to 32A of control valves 26 to 32 constituting a multiple valve 25 in the concave portions 22C, 22E, a work space can be ensured around the hose connection parts 26A to 32A. In addition, each of the pilot hoses 33 can be extended along the concave portions 22C, 22E.

Description

  The present invention relates to a construction machine such as a hydraulic excavator provided with a control valve group for controlling various actuators, for example.

  2. Description of the Related Art Generally, a hydraulic excavator as a construction machine includes a lower traveling body that can be self-propelled by a traveling motor, an upper revolving body that is mounted on the lower traveling body so as to be able to swivel and that drives an hydraulic motor, and the upper revolving body. It is generally configured by a front device that is provided on the body and moves up and down by an actuator.

  The upper swing body has a swing frame that forms a support structure, and a control valve support plate is provided on the swing frame. On the control valve support plate, a travel motor and a front of the lower travel body are provided. A control valve group for controlling various actuators including the actuator of the apparatus is provided. In addition, the control valve group includes, for example, a multiple valve in which a plurality of hydraulic pilot type control valves provided with hose connection ports at both ends in the length direction are arranged in parallel and other control valves. ing. Then, a pilot hydraulic hose is connected to the hose connection port of each control valve that constitutes the control valve group, so that each control valve is operated by operating a lever, a pedal, or the like (for example, a patent) Reference 1).

JP 2001-262615 A

  Here, since the control valve group composed of multiple valves and the like configured by overlapping a plurality of control valves is heavy, the control valve support plate on which the control valve group is mounted is thick and strong. It must be formed using a flat plate. In addition, since a hydraulic hose is connected to the hose connection port of each control valve constituting the control valve group, in order to secure a space for connecting the hydraulic hose or arranging the connected hydraulic hose. The control valve group needs to be arranged at a high position, and the control valve support plate is assembled in a pedestal shape using welding means. Therefore, there are problems that the weight of the control valve support plate is increased and that the assembly work of the control valve support plate is troublesome.

  The present invention has been made in view of the above-described problems of the prior art, and an object of the present invention is to secure a space for arranging the hydraulic hose while achieving both weight reduction and high rigidity of the control valve support plate. It is to provide such a construction machine.

  A construction machine according to the present invention is provided with a lower traveling body capable of self-propelling by a traveling motor, an upper revolving body equipped with a prime mover mounted on the lower traveling body so as to be capable of turning and driving a hydraulic pump, and the upper revolving body. The upper revolving body is provided with a revolving frame forming a support structure, a control valve support plate provided on the revolving frame, and the control valve support plate. A control valve group comprising a plurality of control valves for controlling various actuators including an actuator of the front device and a traveling motor of the lower traveling body, and a hose connection portion provided for each control valve of the control valve group. And a plurality of hydraulic hoses.

  And in order to solve the above-mentioned problem, the feature of the configuration adopted by the invention of claim 1 is that the control valve support plate has alternating chevron portions protruding upward and concave recesses recessed downward. Each control valve is attached to each of the chevron portions of the control valve support plate, and the hose connection portion of each control valve is formed by a concave portion of the control valve support plate. It arrange | positions in a position and exists in having set it as the structure arranged so that each said hydraulic hose may extend along the said recessed part from the said hose connection part.

  According to a second aspect of the present invention, the swivel frame includes a bottom plate extending in the front and rear directions, a left and right vertical plate extending in the front and rear directions on the bottom plate, and an outer side of the bottom plate. Surrounding arc-shaped left and right side frames, a front frame connecting the front side of the bottom plate and the front end of the left side frame, and an intermediate position in the front and rear directions of the bottom plate and the left side frame The control valve support plate has a configuration in which a front part is attached to the front frame and a rear part is attached to the extension beam.

  According to a third aspect of the present invention, a canopy device or a cab device on which an operator is seated is provided at a portion defined by the left side frame, the front frame, and the overhanging beam of the turning frame, and the control valve support plate is The configuration is such that the canopy device or the cab device is disposed below.

  According to a fourth aspect of the present invention, the control valve of the control valve group includes an electromagnetic control valve, and the control valve support plate includes the electromagnetic control valve in addition to the hydraulic hose along the recessed portion. In other words, the electric wiring to be connected is arranged.

  In the present invention, the control valve of the control valve group may include a travel speed switching valve for switching the travel speed by the travel motor. As a result, a travel speed switching valve for switching the travel speed by the travel motor can be attached to the control valve support plate as a control valve of the control valve group.

  In the present invention, the various actuators may include a spare actuator other than the front device, and the control valve of the control valve group may include a selector valve that switches the drive of the spare actuator. Good. As a result, a selector valve for switching the drive of a spare actuator other than the front device can be attached to the control valve support plate as a control valve of the control valve group.

  Furthermore, in the case of the present invention, a rotational speed control actuator for controlling the rotational speed of the prime mover may be provided in the chevron portion of the control valve support plate in addition to the control valve group. Thereby, the rotational speed control actuator for controlling the rotational speed of the prime mover can be attached to the angled portion of the control valve support plate.

  According to the first aspect of the present invention, the control valve support plate is formed by using the corrugated plate formed by alternately arranging the chevron portions protruding upward and the concave portions recessed downward. Each control valve is attached to the chevron of the control valve support plate. On this, the hose connection portion of each control valve is arranged at the position of the recessed portion of the control valve support plate, and each hydraulic hose extends from the hose connection portion along the recessed portion. .

  Therefore, by forming the control valve support plate using a three-dimensional corrugated plate made of a mountain-shaped portion and a recessed portion, high rigidity can be obtained without increasing the plate thickness. In addition, when each control valve of the control valve group is attached to the angled portion of the control valve support plate, the hose connection portion is disposed at the position of the recessed portion of the control valve support plate. A working space can be secured between the recess. Furthermore, each hydraulic hose connected to the hose connection portion can be arranged using the space in the recessed portion.

  As a result, the control valve support plate can be formed with high strength using a thin plate, and both weight reduction and high rigidity can be achieved. Moreover, since a working space can be secured between the hose connection portion and the recessed portion using the corrugated shape of the control valve support plate, the connection work of the hydraulic hose to the hose connection portion, for example, a screw using a spanner or the like The tightening operation can be easily performed, and the assembly workability can be improved. In addition, since each hydraulic hose connected to the hose connection part can be routed so as to extend along the recessed part, for example, each hydraulic hose can be neatly arranged even in a small construction machine, and piping work and maintenance work are easy. Can be done.

  According to the invention of claim 2, the revolving frame includes a bottom plate extending in the front and rear directions, left and right vertical plates standing on the bottom plate extending in the front and rear directions, and an outer side of the bottom plate. Surrounding arc-shaped left and right side frames, a front frame connecting the front side of the bottom plate and the front end of the left side frame, and an intermediate between the bottom plate and the left side frame in the front and rear directions The control valve support plate can be easily mounted on the swivel frame by attaching the front part thereof to the front frame and attaching the rear part thereof to the extension beam. Can do.

  According to the invention of claim 3, a canopy device or a cab device on which an operator is seated is provided at a portion defined by the left side frame, the front frame, and the overhanging beam of the revolving frame, and the control valve support plate includes: It is set as the structure arrange | positioned under this canopy apparatus or a cab apparatus. Therefore, the control valve support plate and the control valve group can be efficiently arranged using the lower space of the canopy device or the cab device that tends to become a dead space.

  According to the invention of claim 4, when an electromagnetic control valve is included as a control valve of the control valve group, the electric wiring connected to the electromagnetic control valve extends along the recessed portion of the control valve support plate. It is possible to effectively use the space in the recessed portion.

It is a front view which shows the hydraulic excavator applied to embodiment of this invention. It is a top view which expands and shows the hydraulic excavator which abbreviate | omitted the front apparatus. It is a top view which expands and shows the turning frame to which the control valve support plate carrying a control valve group etc. was attached. It is a top view which shows the turning frame to which the control valve support plate was attached. It is a perspective view which shows the turning frame to which the control valve support plate was attached. It is a top view which expands and shows the control valve support plate carrying a control valve group. It is a perspective view which expands and shows the control valve support plate carrying a control valve group. It is sectional drawing which looked at the control valve support plate carrying a control valve group etc. from the arrow VIII-VIII direction in FIG. It is a disassembled perspective view of a control valve group, a control valve support plate, a front frame, and an extended beam. It is an external appearance perspective view which shows a control valve support plate alone. It is a circuit diagram which shows the hydraulic circuit of a hydraulic shovel. It is a perspective view which shows the control valve support plate by the 1st modification of this invention in the state which mounts a multiple valve. It is a top view which shows the state which attached the control-valve support plate between the front frame and the extension beam of the small turning frame by the 2nd modification of this invention.

  Hereinafter, as a construction machine applied to the embodiment of the present invention, a canopy-spec hydraulic excavator will be described as an example and described in detail with reference to FIGS.

  In FIG. 1, reference numeral 1 denotes a canopy-spec hydraulic excavator as a construction machine applied to the present embodiment. The hydraulic excavator 1 is a small excavator called a mini excavator suitable for work on a narrow work site. . The excavator 1 includes a self-propelled lower traveling body 2, an upper revolving body 4 mounted on the lower traveling body 2 via a swivel device 3 so as to be capable of swiveling, The front apparatus 5 is provided roughly on the front side in the rear direction, and performs the excavation work of earth and sand.

  The lower traveling body 2 has left and right track side frames 2A. Each track side frame 2A is provided with idler wheels 2B and drive wheels 2C (both shown only on the left side) at the front and rear positions, and a crawler belt 2D is wound around the idler wheels 2B and drive wheels 2C. .

  The lower traveling body 2 is provided with left and right traveling motors 2E and 2F (illustrated in FIG. 11) as actuators for rotationally driving the left and right drive wheels 2C. The left and right traveling motors 2E and 2F are constituted by, for example, variable displacement hydraulic motors, and capacity control cylinders 2G and 2H that set the capacity (tilt angle) variably between a large capacity and a small capacity. It has. The left and right displacement control cylinders 2G and 2H are connected to the pilot pump 8B via the hydraulic hose 2J and the travel speed switching valve 35.

  On the other hand, the turning device 3 includes a turning motor 3A formed as an actuator such as a hydraulic motor, and the upper turning body 4 can be turned on the lower traveling body 2 by driving the turning motor 3A. .

  Further, the front device 5 includes a boom 5A attached to the front side of a revolving frame 6 to be described later so as to be swingable and capable of moving up and down, an arm 5B attached to the tip of the boom 5A so as to be able to move up and down, A bucket 5C rotatably attached to the tip of 5B, a boom cylinder 5D that moves up and down the boom 5A, an arm cylinder 5E that moves up and down the arm 5B, and a bucket cylinder 5F that rotates the bucket 5C These cylinders 5D, 5E, and 5F constitute an actuator.

  Further, as shown in FIG. 2, the upper turning body 4 has a left and right width dimension substantially equal to the vehicle width of the lower traveling body 2 and a virtual circle having a turning radius R around the turning center O. It is formed in a substantially circular shape when viewed from above so as to fit within C. As a result, the excavator 1 is rearward so that the rear surface of the counterweight 10 described later is substantially within the vehicle width of the lower traveling body 2 when the upper revolving body 4 turns on the lower traveling body 2 about the turning center O. It is configured as a small swivel excavator.

  The turning radius R is defined by the distance from the turning center O to the rear surface of the counterweight 10, and the virtual circle C is a locus of the rear surface of the counterweight 10 when the upper revolving body 4 is turned. Yes.

  The upper swing body 4 includes a swing frame 6, a counterweight 10, a canopy device 11, a control valve support plate 22, a control valve group 24, and the like, which will be described later.

  Reference numeral 6 denotes a revolving frame constituting a support structure for the upper revolving structure 4. 3, 4, and 5, the swivel frame 6 includes a flat bottom plate 6 </ b> A extending in the front and rear directions in the left and right middle portions, and left and right on the upper surface side of the bottom plate 6 </ b> A. A left vertical plate 6B and a right vertical plate 6C that are vertically spaced apart in the direction, and a support bracket 6D that is provided at the front end of each of the vertical plates 6B and 6C and supports the front device 5; For example, by bending a pipe member or the like, the left side frame 6E and the right side frame 6F formed in an arc shape surrounding the outside of the bottom plate 6A, and the bottom plate 6A provided to the left of the front side of the bottom plate 6A. The left front frame 6G connecting the front side of the left side frame 6E and the front end of the left side frame 6E, and the bottom plate 6A and the left side frame 6E are provided to extend to the left and right in the middle of the front and rear directions. Left extension connecting side frame 6E A beam 6H, a right front frame 6J extending rightward on the front side of the bottom plate 6A and connecting the front side of the bottom plate 6A and the front end of the right side frame 6F, the front of the bottom plate 6A and the right side frame 6F, It is generally constituted by a right extending beam 6K that extends leftward and rightward at an intermediate position in the rearward direction and connects the bottom plate 6A and the right side frame 6F.

  Here, as shown in FIG. 5, the left front frame 6G includes a pipe frame 6G1 connected to the front end of the left side frame 6E and a flat mounting plate 6G2 extending rearward from the pipe frame 6G1. Further, on the pipe frame 6G1 of the left front frame 6G, columns 6L are erected with intervals in the left and right directions, and a floor mounting plate 6M is attached to the upper portion of each column 6L so as to extend in the left and right directions. . A floor support bracket 21 to be described later is attached to the floor attachment plate 6M. A front side of a control valve support plate 22 to be described later is attached to the attachment plate 6G2 of the left front frame 6G.

  Reference numeral 7 denotes an engine (shown by a dotted line in FIG. 1) as a prime mover mounted on the rear side of the revolving frame 6, and the engine 7 rotationally drives a hydraulic pump 8 described later. Further, the engine 7 has a governor lever for controlling the rotational speed, and the governor lever is connected to a rotational speed control actuator 39 to be described later via a control cable (none of which is shown).

  Reference numeral 8 denotes a hydraulic pump attached to the engine 7. The hydraulic pump 8 includes, as shown in FIG. 11, the traveling motors 2E and 2F of the lower traveling body 2, the turning motor 3A of the turning device 3, and the front device 5. The main pump 8A is configured to supply pressure oil to the cylinders 5D, 5E, 5F and the like, and the pilot pump 8B is configured to supply pilot pressure to the operation levers 14 and 15 and the travel levers 16 and 17 described later. Reference numeral 9 denotes a hydraulic oil tank (shown by a dotted line in FIG. 2 and indicated by a symbol in FIG. 11) provided on the revolving frame 6.

  Reference numeral 10 denotes a counterweight provided at the rear portion of the turning frame 6, and the counterweight 10 balances the weight with the front device 5. Further, the counterweight 10 is formed in an arc shape so as to cover the engine 7 from the rear side.

  Reference numeral 11 denotes a canopy device provided on the swivel frame 6. The canopy device 11 is located on the left side of the swivel frame 6, that is, at a portion defined by the left side frame 6E, the left front frame 6G, and the left extending beam 6H. Thus, a living space for the operator is formed. The canopy device 11 includes a floor member 12, a driver's seat 13, left and right operation levers 14 and 15, left and right traveling levers 16 and 17, an attachment operation lever 18, a ceiling plate 20, and the like. Yes.

  Here, as shown by a two-dot chain line in FIG. 1, the canopy device 11 is supported so that the front side position can be tilted to the front side position of the revolving frame 6, and tilts up and down with the front side position as a fulcrum. Can do. Thereby, the control valve group 24 and the like which will be described later can be disposed even on the left side portion of the turning frame 6 closed by the canopy device 11 and the like.

  Reference numeral 12 denotes a floor member provided on the left side of the revolving frame 6. The floor member 12 has a driver seat mounting portion for attaching the driver seat 13 on the rear side, and a footrest portion on which the operator sitting on the driver seat 13 puts his / her foot. Further, the front portion of the floor member 12 is supported by the floor mounting plate 6M of the revolving frame 6 so as to be tiltable via a floor support bracket 21 described later.

  Reference numeral 13 denotes a driver seat provided on the driver seat mounting portion of the floor member 12, and the driver seat 13 is seated by an operator when the hydraulic excavator 1 is operated. Further, on both the left and right sides of the driver's seat 13, work levers 14 and 15 for operating the turning device 3 and the front device 5 are provided as shown in FIGS. On the other hand, left and right traveling levers (pedals) 16 and 17 for traveling the lower traveling body 2 are provided in front of the driver seat mounting portion of the floor member 12 on the front side of the driver seat 13.

  Further, an attachment operation lever 18 (shown in FIG. 11) is provided around the driver's seat 13, and the attachment operation lever 18 is used to operate an attachment (not shown) such as a fork grapple or a breaker. is there. The attachment operation means is not limited to the attachment operation lever 18, and for example, a pedal, a switch, or the like can be used.

  Here, each of the work levers 14 and 15, the travel levers 16 and 17, and the attachment operation lever 18 are configured as a pressure reducing valve type hydraulic pilot valve. A supply-side hydraulic hose 19 is connected to the inflow side of each lever 14-18, and the hydraulic hose 19 is connected to the pilot pump 8B via a gate lock valve 42 described later.

  On the other hand, the outflow side of the left working lever 14 is connected to a hose connection portion 26A of a turning control valve 26 and a hose connection portion 27A of an arm control valve 27 which constitute a multiple valve 25 described later via a pilot hose 33 described later. And connected to. The outflow side of the right working lever 15 is connected to a hose connection portion 28A of the boom control valve 28 and a hose connection portion 29A of the bucket control valve 29 via a pilot hose 33.

  The outflow sides of the left and right travel levers 16 and 17 are connected to the hose connection portions 30A and 31A of the left and right travel control valves 30 and 31 via a pilot hose 33. Further, the outflow side of the attachment operation lever 18 is connected to the hose connection portion 32 </ b> A of the attachment control valve 32 via the pilot hose 33.

  Reference numeral 20 denotes a ceiling plate constituting the canopy device 11. The ceiling board 20 covers the upper side of the driver's seat 13, and four struts 20 </ b> A extending downward are attached to the floor member 12. The ceiling board 20 may be configured to be supported by two or three columns 20A.

  The canopy device 11 configured as described above tilts the front side portion of the floor member 12 to the front side position of the revolving frame 6 via the floor support member including the floor support bracket 21 (illustrated in FIGS. 3 and 4). Supported as possible. The rear portion of the floor member 12 is detachably attached to a structure such as the counterweight 10. Thereby, by removing the rear part of the floor member 12 from the counterweight 10 and lifting the rear part upward, as shown by a two-dot chain line in FIG. 1, the front floor support member can be tilted up as a fulcrum. . In the tilted-up state of the canopy device 11, the left side portion of the turning frame 6 closed by the canopy device 11 or the like can be opened, and inspection and maintenance of the control valve group 24 described later can be performed. On the other hand, it is possible to tilt down by lowering the rear part of the floor member 12.

  Next, the configuration of the control valve support plate 22 according to the present embodiment provided in the revolving frame 6 to support the control valve group 24 described later will be described.

  That is, reference numeral 22 denotes a control valve support plate provided on the left side of the swing frame 6. As shown in FIGS. 4 and 5, the control valve support plate 22 is disposed at a portion defined by the left vertical plate 6B, the left side frame 6E, the left front frame 6G, and the left extending beam 6H.

  Further, as shown in FIGS. 6, 7, and 8, the control valve support plate 22 supports a multiple valve 25, a travel speed switching valve 35, a selector valve 37, a rotation speed control actuator 39, and the like which will be described later. It is. The control valve support plate 22 is formed by staggering one plate body on the front side and the back side along a plurality of parallel folding lines extending in the front and rear directions with a predetermined interval in the left and right directions. It is formed as a corrugated plate by bending.

  Specifically, as shown in FIGS. 8 and 10, the control valve support plate 22 is disposed near the center in the left and right directions, and extends leftward and rightward in a state of protruding upward and extending in the front and rear directions. 22A, 22B, and the left, middle, and right recessed portions 22C, 22D, and 22E, which are disposed adjacent to the respective chevron portions 22A and 22B and extend in the front and rear directions while being recessed downward, The left and right half chevron portions 22F and 22G are located outside the right direction and protrude upward.

  Here, since the control valve support plate 22 is formed as a three-dimensional corrugated plate by the chevron portions 22A, 22B, the recessed portions 22C, 22D, 22E and the half chevron portions 22F, 22G, the plate thickness is made as a material. Even when a thin steel plate or the like is used, high rigidity can be obtained in the completed state, and the control valve support plate 22 can be formed in a light weight. Further, the control valve support plate 22 is provided with the recessed portions 22C, 22D, and 22E between the angled portions 22A and 22B and the half angled portions 22F and 22G, so that the space in the recessed portions 22C, 22D, and 22E is provided. For example, it can be used as a work space for connecting the pilot hose 33 and a wiring space for arranging the pilot hose 33.

  Then, as shown in FIGS. 6 and 9, the control valve support plate 22 fastens the front portions of the left and right recessed portions 22C and 22E to the mounting plate 6G2 of the left front frame 6G using a bolt 23. By fastening the rear portion of the right recessed portions 22C and 22E to the left overhanging beam 6H using the bolt 23, the right recessed portion 22C and 22E can be disposed at the lower side of the swivel frame 6 at the lower side of the canopy device 11. it can. In this case, the heads of the bolts 23 can be concealed by disposing the left and right recessed portions 22C and 22E at positions lower than the angle portions 22A and 22B. Workability can be performed efficiently.

  Reference numeral 24 denotes a control valve group provided on the control valve support plate 22. The control valve group 24 includes a multiple valve 25, a travel speed switching valve 35, and a selector valve 37, which will be described later.

  Reference numeral 25 denotes a multiple valve provided near the center rear side of the control valve support plate 22. The multiple valve 25 is provided in the middle of the main pipe line from the main pump 8A of the hydraulic pump 8 and supplies pressure oil to the traveling motors 2E and 2F of the lower traveling body 2, the turning motor 3A of the turning device 3, and the working device 5 of the working device 5. The hydraulic pressure is supplied to and discharged from the cylinders 5D, 5E, 5F and an attachment cylinder 45 described later. The multiple valve 25 includes a swing control valve 26 that controls the swing motor 3A of the swing device 3, an arm control valve 27 that controls the arm cylinder 5E of the front device 5, and a boom control valve 28 that controls the boom cylinder 5D. A bucket control valve 29 that controls the bucket cylinder 5F, a left travel control valve 30 that controls the left travel motor 2E of the lower traveling body 2, a right travel control valve 31 that controls the right travel motor 2F, and an attachment cylinder 45 And an attachment control valve 32 for controlling the operation. These control valves 26 to 32 are formed by hydraulic pilot type spool valves.

  First, the turning control valve 26 has hose connection portions 26A on both sides of a rectangular parallelepiped main body portion extending in the lateral direction. A discharge-side pilot hose 33 is connected to each of the left and right hose connection portions 26 </ b> A, and each pilot hose 33 is connected to the left working lever 14. Further, the arm control valve 27 has hose connection portions 27A on both sides of the main body portion in substantially the same manner as the swing control valve 26. The left and right hose connection portions 27A are connected to the left working lever 14 via the pilot hose 33. It is connected to the.

  Next, the hose connection portion 28 </ b> A of the boom control valve 28 is connected to the right working lever 15 via the pilot hose 33. Further, the hose connection portion 29 </ b> A of the bucket control valve 29 is connected to the right working lever 15 via the pilot hose 33.

  On the other hand, the left travel control valve 30 has hose connection portions 30A on both sides of the main body, almost the same as the turning control valve 26 and the like, and the left and right hose connection portions 30A travel left via the pilot hose 33. Connected to the lever 16. Further, the hose connection portion 31 </ b> A of the right travel control valve 31 is connected to the right travel lever 17 via a pilot hose 33.

  Further, the attachment control valve 32 has a hose connection portion 32A on both sides of the main body portion in substantially the same manner as the swing control valve 26 and the like, and the left and right hose connection portions 32A are attached to the attachment operation lever via the pilot hose 33. 18 is connected.

  The multiple valve 25 configured as described above is configured as one valve assembly by connecting the control valves 26 to 32 so as to be arranged in parallel. As shown in FIG. 9, the multiple valve 25 is arranged near the center rear side of the control valve support plate 22, and is mounted on the left and right chevron portions 22 </ b> A and 22 </ b> B using bolts 34. In this case, the multiple valve 25 can arrange the hose connection portions 26A to 32A of the control valves 26 to 32 at the upper positions of the left and right recessed portions 22C and 22E.

  Thereby, between the hose connection portions 26A to 32A of the control valves 26 to 32 and the left and right recessed portions 22C and 22E, an operation for connecting the pilot hose 33, for example, a tool such as a spanner is used. It is possible to secure a work space for performing the screw tightening operation and the like. Moreover, the pilot hose 33 connected to the hose connection portions 26A to 32A of the control valves 26 to 32 is connected to the hose connection portions 26A to 32A downward, so that the left and right sides of the hose connection portions 26A to 32A Can extend along the recesses 22C and 22E.

  Reference numeral 35 denotes a travel speed switching valve that constitutes a control valve of the control valve group 24. The travel speed switching valve 35 is provided in the middle of a hydraulic hose 2J that supplies pressure oil to the capacity control cylinders 2G and 2H of the lower traveling body 2. Is provided. The travel speed switching valve 35 switches the travel speed by the travel motors 2E and 2F of the lower traveling body 2 between, for example, a low speed and a high speed. The travel speed switching valve 35 is formed as an electromagnetic pilot type control valve, and as shown in FIGS. 7 and 8, one side of an electrical wiring 35B generally called a harness is connected to the lower wiring connection portion 35A. Yes. The other side of the electrical wiring 35B is connected to a speed changeover switch 36 disposed around the driver's seat 13.

  Here, as shown in FIG. 8, the travel speed switching valve 35 is bolted to the front side of the right angle portion 22B of the control valve support plate 22. Thereby, a space can be formed on the lower side of the wiring connecting portion 35 </ b> A by the middle concave recess 22 </ b> D, and the electric wiring 35 </ b> B can be easily connected to the wiring connecting portion 35 </ b> A by this space. In addition, the electrical wiring 35B can be extended along the inside of the concave recess 22D.

  The traveling speed switching valve 35 sets the capacity control cylinders 2G and 2H in the minimum contracted state when the speed switching switch 36 is opened, and sets the traveling speeds of the left and right traveling motors 2E and 2F to a low speed state. On the other hand, when the operator switches the speed changeover switch 36 to the closed state, the respective speed control cylinders 2G, 2H are extended by the pressure oil from the pilot pump 8B, so that the travel speeds by the left and right travel motors 2E, 2F are increased. Can be switched at high speed.

  Reference numeral 37 denotes a selector valve that constitutes a control valve of the control valve group 24. The selector valve 37 switches driving of an attachment cylinder 45 described later. The selector valve 37 is configured as, for example, a manual switching valve disposed between the attachment control valve 32 and the attachment cylinder 45. The selector valve 37 is attached to the rear portion of the left half chevron portion 22F of the control valve support plate 22 via a substantially L-shaped bracket 38.

  The selector valve 37 switches the operation of the attachment cylinder 45 to an expansion / contraction operation (fork grapple operation or the like) or an operation to continuously extend only in the extending direction (operation of a breaker or the like) in accordance with the additionally provided attachment. It is.

  Reference numeral 39 denotes a rotational speed control actuator attached to the front side of the control valve support plate 22, and the rotational speed control actuator 39 is attached to the front side of the left chevron portion 22A via an L-shaped bracket 40. The rotational speed control actuator 39 controls the rotational speed of the engine 7 and is connected to a governor lever of the engine 7 via a wire cable or the like (not shown). Thereby, the rotation speed control actuator 39 can perform control to increase the rotation speed of the engine 7 when a large output is required, and to decrease the rotation speed in other cases.

  A manifold 41 is attached to an intermediate portion of the left half chevron 22F of the control valve support plate 22. The manifold 41 relays a plurality of hydraulic hoses (all not shown).

  Reference numeral 42 denotes a gate lock valve provided in the middle of the hydraulic hose 19 for supplying pilot pressure to each lever 14 to 18, and 43 denotes a gate lock switch for switching the gate lock valve 42. The gate lock switch 43 is opened and closed by operating a gate lock lever 44 (described in FIG. 1) provided on the left side of the driver's seat 13. Here, the gate lock lever 44 jumps up the console box of the left work lever 14 to open the gate lock switch 43 when getting on and off the driver's seat 13. Thereby, supply of the pressure oil to each lever 14-18 is cut off, and erroneous operation of each lever 14-18 is prevented.

  Reference numeral 45 denotes an attachment cylinder (see FIG. 11) added as a spare actuator other than the front device 5. For example, the attachment cylinder 45 opens and closes a fork grapple or the like to grasp an object, or continuously operates a breaker or the like to crush concrete or the like.

  The hydraulic excavator 1 according to the present embodiment has the above-described configuration. Next, when the control valve group 24 is mounted on the control valve support plate 22 and the control valve support plate 22 is attached to the revolving frame 6. The operation will be described.

  First, the multiple valve 25 formed by connecting a plurality of control valves 26 to 32, etc. is arranged near the center rear side of the control valve support plate 22, and bolts 34 are used on the left and right chevron portions 22A and 22B. Install. At this time, the hose connecting portions 26A to 32A of the control valves 26 to 32 constituting the multiple valve 25 are arranged at the upper positions of the left and right recessed portions 22C and 22E. Thereby, since a work space can be formed between each recessed part 22C and 22E under each hose connection part 26A-32A, an operator uses each work space and each hose. The pilot hose 33 can be connected to the connecting portions 26A to 32A.

  Next, the traveling speed switching valve 35 is disposed closer to the front side of the right angle portion 22B of the control valve support plate 22, and is bolted to the right angle portion 22B. At this time, since the lower wiring connecting portion 35A protrudes above the middle concave recess 22D, the electric wiring 35B can be easily connected to the wiring connecting portion 35A.

  The selector valve 37 is attached to the rear part of the left half chevron part 22F via a bracket 38, and the rotation speed control actuator 39 is attached to the front side of the left chevron part 22A via a bracket 40. When the control valve group 24, the rotation speed control actuator 39, etc. are attached to the angle portions 22A, 22B, 22F of the control valve support plate 22 in this way, the control valve support plate 22 is attached to the revolving frame 6.

  In this case, the control valve support plate 22 uses the bolts 23 to fasten the front portions of the left and right recessed portions 22C and 22E to the mounting plate 6G2 of the left front frame 6G of the turning frame 6, and the left and right recessed portions. The rear portions of the portions 22C and 22E are fastened to the left extending beam 6H using the bolts 23. As a result, the control valve group 24 and the like can be disposed at a position below the canopy device 11 on the left side of the turning frame 6. Here, since the control valve support plate 22 is formed as a three-dimensional corrugated plate by the chevron portions 22A, 22B, the recessed portions 22C, 22D, 22E and the half chevron portions 22F, 22G, it is formed from a thin plate. However, in the completed type, high rigidity can be obtained, and the control valve group 24 that is a heavy object can be stably supported.

  When the control valve group 24, the rotational speed control actuator 39, and the like are attached to the revolving frame 6 via the control valve support plate 22, the hose connection portions 26A to 32A of the control valves 26 to 32 constituting the multiple valve 25 are provided. The pilot hose 33 is connected to At this time, since each hose connection part 26A-32A is arrange | positioned in the upper position of the left and right recessed parts 22C and 22E, a work space can also be taken widely on the lower side, and each hose connection The pilot hose 33 can be easily connected to the portions 26A to 32A.

  Further, the pilot hose 33 connected to the hose connection portions 26A to 32A of the control valves 26 to 32 is arranged so as not to obstruct the surroundings by using the spaces in the left and right recessed portions 22C and 22E. be able to. Further, the electric wiring 35B of the travel speed switching valve 35 can be extended along the inside recessed portion 22D. Further, the control valves 26 to 32 include a hydraulic hose from the main pump 8A, travel motors 2E and 2F of the lower traveling body 2, a swing motor 3A of the swing device 3, and cylinders 5D, 5E and 5F of the front device 5. A hydraulic hose (none of which is shown) extending to the other end is connected.

  Next, the operation of the hydraulic excavator 1 will be described. The operator seated in the driver's seat 13 operates the traveling control valves 30 and 31 of the multiple valve 25 by operating the left and right traveling levers 16 and 17, respectively. The lower traveling body 2 can be caused to travel by the traveling motors 2E and 2F. Further, by operating the control valves 26 to 29 of the multiple valve 25 by the left and right work levers 14 and 15, the swivel device 3 and the front device 5 can be operated to perform soil excavation work and the like. .

  Thus, according to the present embodiment, the control valve support plate 22 alternately arranges the mountain-shaped portions 22A, 22B, 22F, 22G protruding upward and the recessed portions 22C, 22D, 22E recessed downward. The multiple valve 25, the traveling speed switching valve 35, the selector valve 37, and the rotational speed control actuator 39, which are formed by using the corrugated plate, and constitute the control valve group 24, are the angled portion 22A of the control valve support plate 22. , 22B, 22F. Accordingly, the control valve support plate 22 has a high rigidity even when a thin plate is used as a material by forming a three-dimensional wave shape including the mountain-shaped portions 22A, 22B, 22F, and 22G and the recessed portions 22C, 22D, and 22E. The control valve group 24, which is a heavy object, can be stably supported without being deformed.

  Moreover, since hose connection part 26A-32A of each control valve 26-32 which comprises the multiple valve 25 is arrange | positioned in the position of each recessed part 22C, 22E, each hose connection part 26A-32A and recessed part are provided. A working space for handling a tool such as a spanner can be secured between the portions 22C and 22E.

  Furthermore, each pilot hose 33 connected to the hose connection portions 26A to 32A of the control valves 26 to 32 is connected downward to the respective hose connection portions 26A to 32A, so that the recesses 22C and 22E are provided. Can extend along.

  As a result, since the control valve support plate 22 can be formed with high strength using a thin plate, both weight reduction and high rigidity can be achieved. In addition, by utilizing the wave shape of the control valve support plate 22, a working space can be secured below each of the hose connection portions 26 </ b> A to 32 </ b> A, and thus each pilot hose 33 for each hose connection portion 26 </ b> A to 32 </ b> A hose connection portion. The connecting work can be easily performed, and the assembling workability can be improved.

  In addition, since the pilot hoses 33 extend along the recessed portions 22C and 22E, the pilot hoses 33 can be arranged in an orderly manner even in a small excavator 1, for example, and piping work and maintenance work can be performed. This can be easily performed and the workability can be improved.

  The revolving frame 6 includes a bottom plate 6A, left and right vertical plates 6B and 6C, a support bracket 6D, left and right side frames 6E and 6F, and left and right front frames 6G and 6J, and left and right overhangs. Since the control valve support plate 22 is configured by the beams 6H and 6K, the control valve support plate 22 fastens the front part of the recessed parts 22C and 22E to the left front frame 6G using the bolt 23, and the rear part of the recessed parts 22C and 22E. Can be mounted on the revolving frame 6 by fastening them to the left overhanging beam 6H using the bolts 23. In this case, since the left and right recessed portions 22C and 22E are arranged at positions lower than the chevron portions 22A and 22B, the head of the bolt 23 can be hidden, and the multiple valve 25 and the like are attached. Sometimes, the workability can be improved by preventing the bolts 23 from getting in the way.

  On the other hand, the control valve support plate 22, the control valve group 24, and the like are arranged below the floor member 12 of the canopy device 11. Therefore, the control valve support plate 22, the control valve group 24, and the like can be efficiently arranged using the space below the canopy device 11 that tends to become a dead space. In this case, since the canopy device 11 can be tilted up or down with the front position as a fulcrum, maintenance work for the control valve group 24 and the like can be performed in a state where the floor member 12 is tilted up.

  Furthermore, in addition to the multiple valve 25, a travel speed switching valve 35, a selector valve 37, and the like can be attached to each angled portion 22A, 22B, 22F, 22G of the control valve support plate 22, and the control valve group 24 In addition, a rotation speed control actuator 39 for controlling the rotation speed of the engine 7 can be attached.

  In the embodiment, the control valve support plate 22 is made to have a single plate body on the front side and the back side along a plurality of parallel folding lines extending in the front and rear directions at predetermined intervals in the left and right directions. The case where it was formed as a corrugated plate by alternately bending to the side has been described as an example. However, the present invention is not limited to this. For example, the present invention may be configured as a first modification shown in FIG.

  That is, in FIG. 12, 51 is a control valve support plate according to the first modification, and the control valve support plate 51 extends forward and backward with a predetermined interval left and right on one plate body. The corrugated plate is formed by pressing the recess. The control valve support plate 51 has a central chevron 51A, a left and right half chevron 51B, 51C projecting upward, and a portion recessed downward by press working is left, The right concave portions 51D and 51E are formed. In this case, by attaching the multiple valve 25 to the central chevron 51A, the hose connecting portions 26A to 32A of the control valves 26 to 32 can be arranged at the positions of the recessed portions 51D and 51E.

  In the embodiment, the left front frame 6G of the revolving frame 6 is constituted by a pipe frame 6G1 connected to the front end of the left side frame 6E and a flat mounting plate 6G2 extending rearward from the pipe frame 6G1. The case where the front side portion of the control valve support plate 22 is attached to the mounting plate 6G2 has been described as an example. However, the present invention is not limited to this. For example, the present invention may be configured as a second modification shown in FIG.

  That is, in FIG. 13, reference numeral 61 denotes a revolving frame according to the second modified example, and the revolving frame 61 is applied to a smaller hydraulic excavator than the revolving frame 6 according to the above-described embodiment. The revolving frame 61 for the ultra-compact hydraulic excavator includes a bottom plate 61A, left and right vertical plates 61B and 61C, a support bracket 61D, left and right side frames 61E and 61F, a left front frame 61G, and a left extending beam 61H. The front right frame 61J and the right extending beam 61K are roughly configured.

  In this small revolving frame 61, the left front frame 61G and the left overhanging beam 61H are close to each other. Therefore, the mounting plate used in the embodiment is omitted, and the control valve support plate is attached to the bracket 61G1 of the pipe-like left front frame 61G. It is good also as a structure which attaches 22 'front part directly.

  Further, in the embodiment, the case where the left and right recessed portions 22C and 22E of the control valve support plate 22 are attached to the left front frame 6G and the left extension beam 6H of the revolving frame 6 is illustrated. However, the present invention is not limited to this. For example, the control valve support plate 22 may be selected from the chevron portions 22A, 22B, 22F, and 22G and attached to the left front frame 6G and the left extension beam 6H. In this case, the control valve support plate 22 is disposed at a predetermined height position by interposing a spacer or the like between the chevron portions 22A, 22B, 22F, 22G and the left front frame 6G, left projecting beam 6H. Can do.

  In the embodiment, the control valve support plate 22 is disposed below the canopy device 11 including the ceiling plate 20 that covers the upper side of the driver's seat 13 above the floor member 12. However, the present invention is not limited to this. For example, the control valve support plate may be disposed below the cab device including a cab box that covers the periphery and the upper side of the driver's seat 13 above the floor member.

  Further, in the embodiment, the hydraulic excavator 1 including the crawler type lower traveling body 2 is described as an example of the construction machine. However, the present invention is not limited to this, and may be applied to, for example, a hydraulic excavator provided with a wheel-type lower traveling body.

1 Excavator (construction machine)
2 Lower traveling body 2E Left traveling motor 2F Right traveling motor 3 Turning device 3A Turning motor 4 Upper turning body 5 Front device 5D Boom cylinder 5E Arm cylinder 5F Bucket cylinder 6, 61 Swing frame 6A, 61A Bottom plate 6B, 61B Left vertical plate 6C , 61C Right vertical plate 6D, 61D Support bracket 6E, 61E Left side frame 6F, 61F Right side frame 6G, 61G Left front frame 6H, 61H Left extension beam 7 Engine 8 Hydraulic pump 11 Canopy device 12 Floor member 13 Driver's seat 14 Left work Lever 15 Right working lever 16 Left traveling lever 17 Right traveling lever 18 Attachment operation lever 20 Ceiling plate 22, 51, 22 'Control valve support plate 22A Left mountain-shaped portion 22B Right mountain-shaped portion 22C, 51D Left concave portion 22D Middle concave portion 22E, 51E Right concave recess 22F, 51B Left half chevron part 22G, 51C Right half chevron part 24 Control valve group 25 Multiple valve 26 Swing control valve 26A, 27A, 28A, 29A, 30A, 31A, 32A Hose connection part 27 Arm control Valve 28 Boom control valve 29 Bucket control valve 30 Left travel control valve 31 Right travel control valve 32 Attachment control valve 33 Pilot hose (hydraulic hose)
35 Travel Speed Switching Valve 35A Wiring Connection 35B Electrical Wiring 36 Speed Switch 37 Selector Valve 39 Speed Control Actuator 43 Gate Lock Switch 45 Attachment Cylinder (Spare Actuator)
51A Yamagata

Claims (4)

A lower traveling body capable of self-propelling by a traveling motor, an upper revolving body equipped with a prime mover that is mounted on the lower traveling body to drive a hydraulic pump, and a front that is provided on the upper revolving body and moves up and down by an actuator. Consisting of equipment,
The upper swing body includes a swing frame forming a support structure, a control valve support plate provided on the swing frame, an actuator of the front device provided on the control valve support plate, and travel of the lower travel body Construction comprising a control valve group consisting of a plurality of control valves for controlling various actuators including a motor, and a plurality of hydraulic hoses connected to hose connection portions provided for each control valve of the control valve group In the machine
The control valve support plate is formed by using a corrugated plate formed by alternately arranging a mountain-shaped portion protruding upward and a recessed portion recessed downward.
Each of the control valves is attached to a chevron of the control valve support plate,
The hose connection part of each control valve is arranged at the position of the recessed part of the control valve support plate,
The construction machine characterized in that each hydraulic hose is arranged to extend from the hose connection portion along the recessed portion. The swivel frame is formed in a circular arc shape surrounding a bottom plate extending in the front and rear directions, left and right vertical plates extending up and down in the front and rear directions on the bottom plate, and surrounding the outside of the bottom plate. Left and right side frames, a front frame that connects the front side of the bottom plate and the front end of the left side frame, and an extended beam that connects the bottom plate and the left side frame at an intermediate position in the front and rear directions. Configure
The construction machine according to claim 1, wherein the control valve support plate is configured to attach a front side portion to the front frame and attach a rear side portion to the extension beam. Of the swivel frame, a portion defined by the left side frame, the front frame, and the overhanging beam is provided with a canopy device or a cab device on which an operator is seated,
The construction machine according to claim 2, wherein the control valve support plate is arranged below the canopy device or the cab device.   The control valve of the control valve group includes an electromagnetic control valve, and the control valve support plate is provided with electric wiring connected to the electromagnetic control valve in addition to the hydraulic hose along the recessed portion. The construction machine according to claim 1, 2 or 3 configured as a countermeasure.

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