JP2018111937A - Small hydraulic shovel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To downsize a console device arranged on an entrance side.SOLUTION: A left console device 16 arranged at an entrance side 12 is configured to include: an attachment base 17 secured to a driver seat base 9; a pivot 19 arranged extendingly in a right and left direction on the attachment base 17; a pivoting frame 20 arranged pivotably in a vertical direction on the pivot 19 as a supporting point; a pilot valve 26 attached to the pivoting frame 20; and a console cover 28 covering the pivoting frame 20 and the pilot valve 26 from both of left and right sides, and the upper side, pivoting together with the pivoting frame 20. The pivot 19 is arranged to be biased to a right side surface 28D of the console cover 28, forming a hose receiving space 30 between a left end 19A of the pivot 19 and a left side surface 28C of the console cover 28.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a small excavator used for excavation work in a narrow work site such as an urban area.

  In general, among hydraulic excavators that are representative examples of construction machinery, a small hydraulic excavator called a mini excavator is suitably used for excavation work in an urban area or the like, dismantling work inside a building, and the like. This small hydraulic excavator, for example, has a total weight of about 0.7 to 8 tons, and is mounted on a lower traveling body capable of traveling on its own and capable of turning on the lower traveling body via a turning device. The upper turning body having a boarding / exiting opening on at least one side thereof and a front device provided on the upper turning body so as to be able to move up and down.

  The upper swing body of the small hydraulic excavator includes a swing frame forming a support structure, a counterweight provided on the rear side of the swing frame, a prime mover mounted on the swing frame located on the front side of the counterweight, A driver's seat pedestal that covers the upper side and is mounted on the swivel frame and has a driver's seat attached thereto, and a left and right console device that is provided on the driver's seat pedestal with the driver's seat sandwiched from the left and right directions. Yes. In this case, when the upper swing body is swung, the small hydraulic excavator has at least the rear end of the upper swing body (the rear surface of the counterweight) approximately the vehicle width of the lower traveling body (the width dimension between the left and right crawlers). ) And can be smoothly turned even in a narrow work site.

  The console device of a small hydraulic excavator is capable of rotating upward and downward about a mounting base fixed to the driver's seat base, a rotating shaft extending left and right on the mounting base, and a rotating shaft as a fulcrum. A pivot frame that is attached, a pilot valve that is attached to the pivot frame and supplies pilot pressure to the control valve device via the pilot hose according to the operation of the control lever, and a box that covers the pivot frame and the pilot valve from the outside And a console cover. The operation of the front device and the turning device can be controlled by the operator sitting in the driver's seat operating the operation lever.

  Here, at least one of the left and right sides of the upper swing body is formed with an entrance for an operator to get on and off the driver's seat. The tip of the operation lever provided may protrude toward the entrance and exit, which may hinder the operator from getting on and off the driver's seat.

  On the other hand, a hydraulic excavator having a flip-up type console device has been proposed. This flip-up type console device can retreat the tip of the operation lever from the entrance / exit by turning upward (pushing up) about the rotation axis. Thus, the operator can smoothly get on and off the driver's seat through the entrance / exit without being obstructed by the operation lever (see Patent Document 1).

JP 2001-107390 A

  In the console device according to Patent Document 1, a plurality of pilot hoses that connect between a pilot valve and a control valve are arranged around the axis center of the rotating shaft, and each pilot hose surrounds the rotating shaft from the outer peripheral side. Are arranged as follows. Thereby, each pilot hose follows the jumping-up operation of the console device by curving an intermediate part in an arc shape.

  However, in the console device according to Patent Document 1, there is a problem that the life of each pilot hose is reduced by rubbing each other when the intermediate portion of each pilot hose is bent along with the jumping operation of the console device. On the other hand, when each pilot hose is arranged so as to surround the outer peripheral side of the rotating shaft, the height dimension of the console cover that covers each pilot hose together with the pilot valve, and the length dimension in the front and rear directions are increased. As a result, the size of the console device including the console cover is increased, so that not only the installation space for devices around the console device is limited, but also the operability when the console device is raised is lowered.

  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 provide a small hydraulic excavator that can reduce the size of a console device disposed on the entrance / exit side.

  In order to solve the above-described problems, the present invention has a self-propelled lower traveling body, and is mounted on the lower traveling body through a turning device so as to be capable of turning, and has a doorway on at least one side in the left and right directions. An upper swing body and a front device provided on the upper swing body so as to be able to move up and down. The upper swing body is configured to balance the weight of the swing frame forming the support structure and the front device. A counterweight provided on the rear side of the turning frame, a prime mover mounted on the turning frame so as to be located on the front side of the counterweight, and a driver seat mounted on the turning frame so as to cover the upper side of the prime mover. A driver's seat pedestal, and a left having an operation lever that is provided on the driver's seat pedestal and located on both the left and right sides of the driver's seat to operate the front device and the turning device A right console device, and at least one of the left and right console devices located on the entrance / exit side includes a mounting base fixed to the driver seat base, and a left and right mounting base on the mounting base. A rotating shaft provided extending in the direction, a rotating frame provided so as to be rotatable upward and downward with the rotating shaft as a fulcrum, and a pilot attached to the rotating frame and corresponding to the operation of the operating lever A pilot valve that supplies pressure to the control valve device via a pilot hose, and a frame that covers the rotating frame and the pilot valve from both the left and right sides and the upper side, and rotates integrally with the rotating frame. The present invention is applied to a small excavator configured to include a moving console cover.

  A feature of the present invention is that a hose accommodating space is formed between one end of the rotation shaft in the left and right directions and one side surface of the console cover, and the pilot hose connected to the pilot valve is the hose. There exists in the structure extended to the said control valve apparatus through the accommodation space.

  According to the present invention, since the pilot hose passes through the hose accommodating space formed between one end of the rotating shaft and one side surface of the console cover, the pilot hose is disposed so as to surround the outer peripheral side of the rotating shaft. There is no need. As a result, the height dimension of the console cover covering the pilot hose and the length dimension in the front and rear directions can be reduced, and the entire console apparatus can be reduced in size.

It is a front view which shows the small hydraulic excavator by embodiment of this invention. It is the side view which looked at the small hydraulic excavator from the front side. It is a perspective view which shows a driver's seat base, a driver's seat, and the left and right console devices. It is a partially broken front view which shows the driver's seat base in FIG. 1, a driver's seat, and a console apparatus. It is a front view which shows the state which rotated the left console apparatus to the raising position. FIG. 3 is an exploded view showing a mounting base, a rotating frame, a pilot valve, an operation lever, a console cover and the like constituting the console device. It is the top view which notched a part of console cover and looked at the inside of a console apparatus from upper direction. It is the top view which looked at the inside of the console apparatus from the upper direction in the state which removed the pilot valve and pilot hose in FIG. It is the perspective view which looked at the attachment base attached to the driver's seat base, a rotating shaft, a rotation frame, a gate lock lever, etc. from the left rear. It is the perspective view which looked at the attachment base attached to the driver's seat base, a rotating shaft, a rotation frame, a gate lock lever, etc. from the right rear. FIG. 10 is a perspective view showing a state in which a pilot valve is attached to the rotating frame of FIG. 9. It is a perspective view of the same position as FIG. 11 which shows the state which rotated the rotation frame to the raising position. It is a front view which shows an attachment base, a rotating shaft, a rotation frame, a gate lock lever, etc. in the state which has arrange | positioned the gate lock lever in the interruption | blocking position. It is a front view which shows an attachment base, a rotating shaft, a rotation frame, a gate lock lever, etc. in the state which rotated the gate lock lever upward from the interruption | blocking position. It is a front view which shows an attachment base, a rotating shaft, a rotation frame, a gate lock lever, etc. in the state which rotated the rotation frame to the raising position. It is a front view which shows an attachment base, a rotating shaft, a rotation frame, a gate lock lever, etc. in the state which has arrange | positioned the gate lock lever in the open position.

  Hereinafter, an embodiment of a small hydraulic excavator according to the present invention will be described in detail with reference to FIGS. 1 to 16 by taking a small hydraulic excavator of a small rear turning type as an example.

  In the figure, a small hydraulic excavator 1 of a small rear swivel type is loaded on a truck and transported to a work site, and is used in a narrow work site such as a side ditching operation on a road side in an urban area. It is set to about 7-8 tons.

  The small hydraulic excavator 1 includes a crawler-type lower traveling body 2 that can be self-propelled and an upper revolving body 4 that is mounted on the lower traveling body 2 via a revolving device 3 so as to be capable of swiveling. A soil discharge plate 2A is provided on the front side of the lower traveling body 2, and a swing-type front device 5 that performs excavation work of earth and sand is provided on the front side of the upper swing body 4. The front device 5 includes a swing post 5A attached to a front end of a revolving frame 6 to be described later so as to swing leftward and rightward, a boom 5B attached to the swing post 5A so as to be able to be lifted and lowered, and a tip of the boom 5B. The arm 5C is rotatably attached to the arm 5C, and the bucket 5D is rotatably attached to the tip of the arm 5C.

  The upper swing body 4 includes a swing frame 6, a counterweight 7, an engine 8, a driver seat base 9, a driver seat 10, left and right console devices 16 and 32, which will be described later. Here, the small hydraulic excavator 1 realizes downsizing of the upper swing body 4 by disposing the driver seat 10 on the upper side of the engine 8 via the driver seat base 9. As a result, when the upper swing body 4 is swung, the small excavator 1 is configured so that the rear surface 7A of the counterweight 7 is within the left and right width dimensions (vehicle width dimensions) of the lower travel body 2. ing. Note that the definition of the small rear turn includes the extent that a part of the counterweight 7 protrudes slightly from the vehicle width dimension of the lower traveling body 2 within a range where there is no problem in work.

  The turning frame 6 is provided on the lower traveling body 2 via the turning device 3 so as to be capable of turning. The swivel frame 6 forms a support structure and constitutes the base of the upper swivel body 4. A post support bracket 6 </ b> A is provided at the front of the revolving frame 6. The post support bracket 6A supports the swing post 5A of the front device 5 so as to be rotatable (swingable) in the left and right directions.

  The counterweight 7 is provided at the rear end of the turning frame 6. The counterweight 7 has a weight balance with the front device 5 and is formed as an arcuate heavy object whose left and right central portions protrude rearward. As a result, the rear surface 7A of the counterweight 7 fits within the vehicle width of the lower traveling body 2 when the upper revolving body 4 turns, and avoids interference with surrounding obstacles when the upper revolving body 4 is turning. It can be done.

  The engine 8 as a prime mover is mounted on the rear side of the swivel frame 6 so as to be positioned on the front side of the counterweight 7 as indicated by a broken line in FIG. The engine 8 is mounted on the revolving frame 6 with a crank shaft (not shown) extending in the left and right directions, and drives a hydraulic pump (not shown). As the prime mover, an electric motor or a hybrid prime mover in which an engine and an electric motor are combined can be used.

  The driver seat pedestal 9 is located on the front side of the counterweight 7 and is provided on the turning frame 6. The driver seat pedestal 9 is provided on the revolving frame 6 so as to cover the upper side of the engine 8, hydraulic pump, heat exchanger (not shown) and the like, and supports the driver seat 10. The driver seat pedestal 9 includes a front plate 9A which is disposed on the front side of the engine 8 and rises upward from the revolving frame 6, and a seat mounting plate 9B which extends rearward from the upper end of the front plate 9A and covers the engine 8 and the like from the upper side. Have. The driver's seat 10, the left console device 16, the right console device 32, and the like are attached to the seat mounting plate 9B. A long hose insertion hole 9C extending in the front and rear directions is formed in the vicinity of the left console device 16 in the seat mounting plate 9B, and the same hose insertion hole is also formed in the vicinity of the right console device 32. (Not shown) is formed.

  The driver's seat 10 is provided at the center of the seat mounting plate 9B that constitutes the driver's seat base 9. The driver's seat 10 is seated by an operator who controls the small excavator 1. Left and right console devices 16 and 32 for operating the turning device 3 and the front device 5 are disposed on both the left and right sides of the driver's seat 10.

  On the front side of the driver seat pedestal 9, a footrest member 11 that extends left and right on the turning frame 6 is provided. The footrest member 11 forms a scaffold for an operator seated on the driver's seat 10. Here, one side (left side) of the footrest member 11 in the left and right directions is a boarding / exit 12 for an operator to get on and off the driver's seat 10. Left and right traveling levers / pedals 13 are provided in a portion of the footrest member 11 located on the front side of the driver's seat 10. An operator seated in the driver's seat 10 can control the traveling direction of the small excavator 1 by operating the left and right traveling levers / pedals 13.

  The canopy 14 is disposed so as to cover the driver's seat 10 from above. The canopy 14 is formed, for example, as a two-column canopy having two support columns 14A (only the left side is shown) arranged at intervals in the left and right directions. The lower end of each column 14 </ b> A of the canopy 14 is attached to the rear portion of the driver seat base 9.

  The outer cover 15 is provided on the front side of the counterweight 7 and is provided around the revolving frame 6. The exterior cover 15 is arranged on the upper side of the counterweight 7 and covers the engine 8 and the like from the rear, the left cover 15B extending from the left end of the engine cover 15A to the front and covering the engine 8 and the like from the left side, A right side cover 15C that extends forward from the right end of the cover 15A to the right end of the footrest member 11, covers a hydraulic oil tank, a fuel tank, etc. (none shown), and a revolving frame that is located on the front side of the left side cover 15B. A left skirt cover 15D provided between the footrest member 11 and the footrest member 11, and a right skirt cover 15E provided between the revolving frame 6 and the footrest member 11 on the front side of the right side cover 15C. It is configured to include.

  Next, the left console device 16 and the right console device 32 used in the present embodiment will be described with reference to FIGS.

  The left console device 16 and the right console device 32 are disposed on the seat mounting plate 9B of the driver seat pedestal 9 with the driver seat 10 sandwiched from the left and right directions. Of the left and right console devices 16 and 32, the left console device 16 disposed on the entrance 12 side has an operation position when operated by an operator as shown in FIG. 4 and an operator's seat as shown in FIG. 10 is configured to be rotationally displaced between the jumping position when getting on and off 10. The right console device 32 arranged on the side opposite to the entrance 12 is configured to hold the operation position shown in FIG. 5 regardless of the position (posture) of the left console device 16.

  A left console device 16 serving as one console device arranged on the entrance 12 side is provided with a mounting base 17, a rotating shaft 19, a rotating frame 20, a lever bracket 22, a pilot valve 26, and an operation lever which will be described later. 26A and the console cover 28 are comprised.

  The mounting base 17 is positioned on the left side of the driver's seat 10 and is fixed on the seat mounting plate 9B of the driver's seat base 9, and extends in the front and rear directions. The mounting base 17 includes a bottom plate 17A attached to the seat mounting plate 9B using three bolts 18, a rising plate 17B that rises upward from the right end side of the bottom plate 17A, and a rising plate 17B and the left and right directions. And an L-shaped shaft support plate 17C which is opposed to the bottom plate 17A and fixed to the bottom plate 17A by means of welding or the like. A portion of the bottom plate 17A corresponding to the hose insertion hole 9C of the driver seat base 9 is formed with a notch 17D, and the notch 17D opens the hose insertion hole 9C adjacent to the left side of the mounting base 17. It has become.

  On the other hand, a shaft insertion hole 17E is provided on the lower rear side of the rising plate 17B so as to penetrate in the left and right directions (see FIG. 10). A right end 19B of a rotating shaft 19 to be described later is inserted through the shaft insertion hole 17E. An upper limit stopper shaft 17F, which is positioned above the rotating shaft 19 and extends in the left and right directions, is fixed to the lower rear side of the rising plate 17B. The upper limit stopper shaft 17F protrudes leftward from the rising plate 17B and is inserted into a guide groove hole 22B described later.

  A lower limit stopper shaft 17G extending in the left and right directions is fixed to an intermediate portion in the front and rear directions (length direction) of the rising plate 17B. The lower limit stopper shaft 17G protrudes leftward from the rising plate 17B and engages with a hook 22C described later. Further, a gate lock switch 25 described later is attached to the front end side of the rising plate 17B.

  On the other hand, a shaft insertion hole 17H penetrating in the left and right directions is formed on the surface of the shaft support plate 17C facing the rising plate 17B. The shaft insertion hole 17H is disposed concentrically with the shaft insertion hole 17E of the rising plate 17B, and the left end 19A of the rotating shaft 19 is inserted therethrough. Further, on the surface of the shaft support plate 17C that is orthogonal to the rising plate 17B, an engagement groove 17J that is located in the middle between the upper and lower directions and extends in the left and right directions is formed (see FIG. 9). The engagement groove 17J is for engaging one end 21A of a return spring 21 described later.

  The rotating shaft 19 is attached so as to extend in the left and right directions between the rising plate 17B of the mounting base 17 and the shaft support plate 17C. A left end 19A, which is one end in the left and right directions (axial direction) of the rotary shaft 19, is inserted into the shaft insertion hole 17H of the shaft support plate 17C. A right end 19B, which is the other end in the left and right directions of the rotating shaft 19, is inserted into a shaft insertion hole 17E of the rising plate 17B, and an intermediate portion in the left and right directions of the rotating shaft 19 is an axis of a rotating frame 20 described later. It is inserted through the insertion hole. Here, the rotating shaft 19 is arranged so as to be shifted to a right side surface 28D of a console cover 28 described later, and a hose accommodating space 30 described later is provided between the left end 19A of the rotating shaft 19 and the left side surface 28C of the console cover 28. Is formed.

  As shown in FIG. 10, a retaining plate 19C is engaged with the right end 19B of the rotating shaft 19 projecting from the rising plate 17B toward the driver's seat 10, and this retaining plate 19C is secured to the rising plate using a bolt 19D. It is fixed to 17B. Thereby, the rotating shaft 19 is prevented from being removed from the rising plate 17B and the shaft support plate 17C of the mounting base 17 and is prevented from rotating. A cylindrical collar 19E having a diameter larger than that of the rotating shaft 19 is inserted into the outer peripheral side of the rotating shaft 19, and a return spring 21 is disposed on the outer peripheral side of the collar 19E.

  The rotation frame 20 is provided so as to be rotatable upward and downward with the rotation shaft 19 as a fulcrum. The rotating frame 20 includes a base plate 20A that extends in the front and rear directions while facing the rising plate 17B of the mounting base 17 in the left and right directions, and a valve bracket 20E described later.

  As shown in FIG. 9, FIG. 13, etc., the substrate 20A is composed of an L-shaped plate body whose front side in the front and rear directions extends upward, and includes a rising plate 17B of the mounting base 17 and a shaft support plate 17C. Arranged between. A valve bracket 20E is attached to the upper end 20B of the substrate 20A. On the rear side of the board 20A, a shaft insertion hole (not shown) is formed concentrically with the shaft insertion holes 17E and 17H of the rising plate 17B and the shaft support plate 17C constituting the mounting base 17, and this shaft insertion hole. A rotating shaft 19 is inserted through the shaft. As a result, the rotating frame 20 moves upward and downward between the operation position shown in FIGS. 13 and 14 and the flip-up position shown in FIGS. 15 and 16 with the rotation shaft 19 as a fulcrum with respect to the mounting base 17. To turn.

  A latch pin 20C that is located above the rotary shaft 19 and protrudes toward the shaft support plate 17C is fixed to the surface of the mounting base 17 that faces the shaft support plate 17C. The other end 21B of the return spring 21 is hooked to the hook pin 20C. On the front side of the substrate 20A, a support shaft 20D is provided in the middle between the upper and lower directions. The support shaft 20D protrudes left and right from the board 20A toward the rising plate 17B side of the mounting base 17, and supports a lever bracket 22 described later so as to be rotatable upward and downward.

  The valve bracket 20E is made of a plate bent in a J shape, and is fixed to the upper end 20B of the substrate 20A by welding. A valve support plate 20F made of a rectangular flat plate is fixed to the valve bracket 20E by means such as welding. The valve support plate 20F projects forward from the valve bracket 20E and supports a pilot valve 26 described later. A reinforcing plate 20G is fixed to a portion of the valve bracket 20E near the upper end 20B of the substrate 20A. The reinforcing plate 20G is provided with a locking pin 20H extending in the left and right directions, and one end 24A of a coupling spring 24 described later is hooked on the locking pin 20H.

  A rear cover bracket 20J extending rearward is provided on the rear side of the valve bracket 20E. A front cover bracket 20K that protrudes forward is provided on the front side of the valve support plate 20F. As shown in FIG. 4, a console cover 28 is attached to the rear cover bracket 20J and the front cover bracket 20K. 9 to 11, the rear cover bracket 20J is omitted. The upper end side of the valve bracket 20E is an armrest attaching portion 20L, and an armrest 29 described later is attached to the armrest attaching portion 20L.

  The return spring 21 is provided between the shaft support plate 17 </ b> C of the mounting base 17 and the substrate 20 </ b> A of the rotating frame 20. The return spring 21 is constituted by a torsion coil spring, and is arranged on the outer peripheral side of the collar 19E of the rotating shaft 19 so as to extend in the left and right directions. One end 21A of the return spring 21 is latched in the engagement groove 17J of the shaft support plate 17C, and the other end 21B of the return spring 21 is latched by a latch pin 20C provided on the substrate 20A of the rotating frame 20. ing. Thereby, the return spring 21 urges the rotating frame 20 that has been rotated to the jumping position about the rotating shaft 19 in a direction to return to the operating position about the rotating shaft 19.

  The lever bracket 22 is attached with a gate lock lever 23 described later, and is attached to the rotating frame 20 so as to be rotatable upward and downward with a support shaft 20D as a fulcrum. The lever bracket 22 is formed by a flat plate extending in the front and rear directions, and is disposed between the rising plate 17B of the mounting base 17 and the substrate 20A of the rotating frame 20. A shaft insertion hole 22A is provided at the front and rear intermediate portions of the lever bracket 22, and this shaft insertion hole 22A is rotatably inserted into the support shaft 20D of the rotation frame 20 (see FIG. 10). . The lever bracket 22 is integrally rotated with the gate lock lever 23 and rotated upward and downward between the blocking position shown in FIG. 13 and the open position shown in FIG.

  On the rear side of the lever bracket 22, a guide groove hole 22 </ b> B that is curved upward and extends forward and rearward is formed. The guide groove hole 22B is formed as an arc-shaped hole centered on the axis center of the rotating shaft 19, and the upper limit stopper shaft 17F provided on the rising plate 17B of the mounting base 17 is always engaged. A rear recess 22B1 that is notched downward is formed at the rear end of the guide groove 22B. When the gate lock lever 23 is in the blocking position (position shown in FIG. 13), the upper limit stopper shaft 17F is engaged with the rear recess 22B1. Match. On the other hand, a front recess 22B2 that is notched upward is formed at the front end of the guide groove 22B. When the gate lock lever 23 is in the open position (position in FIG. 16), the upper limit stopper shaft 17F is engaged with the front recess 22B2. To do.

  A substantially J-shaped hook 22 </ b> C is provided at the lower front side of the lever bracket 22. The hook 22 </ b> C engages with a lower limit stopper shaft 17 </ b> G provided on the rising plate 17 </ b> B of the mounting base 17 when the gate lock lever 23 is moved to the blocking position together with the lever bracket 22. Thereby, the gate lock lever 23 is configured to hold the blocking position. As shown in FIG. 10, a locking pin 22 </ b> D that protrudes toward the rising plate 17 </ b> B side of the mounting base 17 is provided on the upper front side of the lever bracket 22. The other end 24B of a connecting spring 24 to be described later is hooked on the locking pin 22D.

  The gate lock lever 23 is provided on the front side of the lever bracket 22. The gate lock lever 23 is composed of a rod-like body bent in a J shape as a whole. The rear end 23 </ b> A side of the gate lock lever 23 is fixed to the upper front portion of the lever bracket 22 using means such as welding, and the front side of the gate lock lever 23 extends forward from the lever bracket 22. The gate lock lever 23 is rotated by an operator seated in the driver's seat 10 between a blocking position for blocking the entrance / exit 12 as shown in FIG. 4 and an opening position for opening the entrance / exit 12 as shown in FIG. Is done. The left console device 16 is pivotally displaced to the operating position when the gate lock lever 23 is in the blocking position, and is pivotally displaced to the jumping position when the gate lock lever 23 is in the open position. A plate-like pressing piece 23B bent in an L shape is fixed in the vicinity of the rear end 23A of the gate lock lever 23.

  The connection spring 24 is provided between the rotating frame 20 and the lever bracket 22 and connects the two. The connection spring 24 is constituted by a torsion coil spring. One end 24A of the connection spring 24 is hooked to a locking pin 20H provided on the reinforcing plate 20G of the rotating frame 20, and the other end 24B of the connection spring 24 is A latch pin 22D provided on the lever bracket 22 is hooked. As a result, the lever bracket 22 is elastically connected to the rotating frame 20 via the connecting spring 24, and the operating force applied to the gate lock lever 23 is transmitted to the rotating frame 20 via the connecting spring 24.

  The gate lock switch 25 is attached to the front end side of the rising plate 17B constituting the attachment base 17 using a bolt 25A. The gate lock switch 25 detects that the gate lock lever 23 is in the blocking position by being pressed by the pressing piece 23B of the gate lock lever 23 when the gate lock lever 23 is in the blocking position.

  The pilot valve 26 is attached to the valve support plate 20F of the rotating frame 20 using a bolt or the like, and is disposed obliquely upward while the left console device 16 is in the operating position. On the upper part of the pilot valve 26, there is provided an operation lever 26A that can be tilted in four directions, ie, front and rear directions and left and right directions. A plurality (for example, five) of pilot hoses 27 are connected to the pilot valve 26. Each pilot hose 27 connects between the pilot valve 26 and a control valve device 33 which will be described later, and supplies pilot pressure corresponding to the operation of the operation lever 26 </ b> A to the control valve device 33.

  The console cover 28 is attached to the rotating frame 20 together with the pilot valve 26. Here, the console cover 28 is formed by a covered frame body that is surrounded by the front surface 28A, the rear surface 28B, the left side surface 28C, the right side surface 28D, and the upper surface 28E and that is open at the lower end side. As shown in FIGS. 4 and 6, the console cover 28 is attached to the rear cover bracket 20J, the front cover bracket 20K, and the like of the rotary frame 20 using bolts 28F, and the rotary frame 20 and the pilot valve 26 are connected to each other. It covers from the left and right sides and from the top. Above the console cover 28, an armrest 29 on which an operator who operates the operation lever 26A puts his arm is arranged. The armrest 29 is attached to the armrest attachment portion 20L of the rotating frame 20 using bolts 29A.

  The hose accommodating space 30 is formed between a left end 19A that is one end in the left and right directions of the rotary shaft 19 and a left side surface 28C that is one side in the left and right directions of the console cover 28 that is a frame. (See FIGS. 7 and 8). The hose accommodating space 30 is a space formed in the console cover 28 for accommodating each pilot hose 27 connected to the pilot valve 26, and the left console device 16 is in the operating position shown in FIG. Located on the rear side of the pilot valve 26, it is formed between the left end 19 </ b> A of the rotating shaft 19 and the left side surface 28 </ b> C of the console cover 28. Thereby, the hose accommodating space 30 is disposed above the hose insertion hole 9 </ b> C formed in the driver seat base 9.

  Each pilot hose 27 passes through the hose accommodating space 30 and is inserted into the driver seat base 9 through the hose insertion hole 9 </ b> C of the driver seat base 9. A hose clamp 31 is provided on the back surface of the seat mounting plate 9B of the driver seat base 9 in the vicinity of the hose insertion hole 9C, and each pilot hose 27 inserted into the driver seat base 9 is moved by the hose clamp 31. After being bound, it extends to the control valve device 33.

  As described above, in the left console device 16 according to the present embodiment, the rotation shaft 19 is arranged so as to be shifted to the right side surface 28D that is the other side surface of the console cover 28 formed of a frame, and the left end 19A of the rotation shaft 19 A hose housing space 30 is formed between the left side surface 28 </ b> C of the console cover 28. Accordingly, it is not necessary to arrange each pilot hose 27 so as to be largely curved so as to surround the outer peripheral side of the rotating shaft 19, and each pilot hose 27 is linearly passed through the left side of the left end 19 </ b> A of the rotating shaft 19. Can be arranged.

  As a result, the left console device 16 has a height of the console cover 28 that covers the pilot valve 26, each pilot hose 27, etc., as compared with the configuration of the prior art in which the pilot hose is arranged so as to surround the outer peripheral side of the rotating shaft. The console cover 28 can be downsized while keeping the dimensions and the length in the front and rear directions small.

  Next, as shown in FIGS. 3 and 5, the right console device 32 is positioned on the right side of the driver's seat 10 and fixedly mounted on the seat mounting plate 9 </ b> B of the driver's seat base 9. That is, the right console device 32 does not include a jumping mechanism including a gate lock lever like the left console device 16. The right console device 32 includes a pilot valve (not shown), an operation lever 32A, a console cover 32B, and an armrest 32C.

 The control valve device 33 is mounted on the revolving frame 6 so as to be positioned below the footrest member 11 (see FIG. 1). As shown in FIG. 4, a plurality of pilot hoses 27 and a plurality of main hoses 34 are connected to the control valve device 33, and each main hose 34 is a variety of hydraulic actuators provided in the small hydraulic excavator 1. It is connected to the. The control valve device 33 is supplied with a pilot pressure from the pilot hose 27 in accordance with an operation on the operation levers 26A and 32A, so that the pressure oil discharged from a pump (not shown) is supplied to the desired hydraulic pressure through the main hose 34. This is supplied to the actuator.

  Next, the operation when the gate lock lever 23 is rotated from the blocking position to the open position and the left console device 16 is rotated from the operation position to the jumping position will be described with reference to FIGS. 13 to 16. . 13 to 16, the shaft support plate 17C of the mounting base 17 is omitted and the end surfaces of the upper limit stopper shaft 17F and the lower limit stopper shaft 17G are omitted in order to clarify the operations of the rotating frame 20, the lever bracket 22, and the like. It is shown as a fracture surface.

  As shown in FIG. 13, when the gate lock lever 23 is in the blocking position, the rear recess 22 </ b> B <b> 1 provided in the lever bracket 22 is engaged with the upper limit stopper shaft 17 </ b> F of the mounting base 17. . Further, the hook 22 </ b> C of the lever bracket 22 is engaged with the lower limit stopper shaft 17 </ b> G of the mounting base 17. Further, the gate lock switch 25 is pressed by the pressing piece 23B of the gate lock lever 23, and detects that the gate lock lever 23 is in the blocking position. The rotating frame 20 holds the operation position.

  Next, as shown in FIG. 14, the gate lock lever 23 is rotated in the direction of arrow A with the support shaft 20 </ b> D of the rotation frame 20 as a fulcrum. As a result, the rear recess 22B1 of the guide groove 22B is detached from the upper limit stopper shaft 17F of the mounting base 17, and the hook 22C is detached from the lower limit stopper shaft 17G of the mounting base 17. Further, the pressing piece 23 </ b> B of the gate lock lever 23 is released from the gate lock switch 25. In this state, the rotating frame 20 holds the operation position.

  When the gate lock lever 23 is further rotated in the direction indicated by arrow A, the upper limit stopper shaft 17F detached from the rear recess 22B1 of the guide groove 22B comes into contact with the peripheral edge on the rear end side of the guide groove 22B. Thereby, the rotation operation of the lever bracket 22 using the support shaft 20D as a fulcrum is restricted, and the lever bracket 22 shifts to the rotation operation using the rotation shaft 19 as a fulcrum together with the rotation frame 20.

  That is, as shown in FIG. 15, when the gate lock lever 23 is rotated in the direction indicated by the arrow B with the rotating shaft 19 as a fulcrum, the operating force applied to the gate lock lever 23 causes the coupling spring 24 to be moved from the lever bracket 22. Via the rotation frame 20. As a result, the lever bracket 22 and the rotating frame 20 rotate upward together with the rotating shaft 19 as a fulcrum. Then, in the state where the front end of the guide groove hole 22B is in contact with the upper limit stopper shaft 17F, the rotating operation of the rotating frame 20 with the rotating shaft 19 as a fulcrum is restricted, and the rotating frame 20 moves to the jumping position. .

  In the state where the rotating frame 20 has moved to the jumping position, the rotating operation of the rotating frame 20 with the rotating shaft 19 as a fulcrum is restricted, so that the lever bracket 22 moves the support shaft 20D with respect to the rotating frame 20. The operation moves to a pivoting operation with a fulcrum.

  That is, as shown in FIG. 16, the upper limit stopper shaft 17F is engaged with the front recess 22B2 from the front end of the guide groove hole 22B by rotating the gate lock lever 23 in the direction of arrow C with the support shaft 20D as a fulcrum. The lever bracket 22 rotates with respect to the rotating frame 20 until they are combined. Then, the front side recess 22B2 of the guide groove hole 22B is engaged with the upper limit stopper shaft 17F, whereby the pivoting operation of the lever bracket 22 is restricted, and the gate lock lever 23 stops at the open position.

  In this state, the return spring 21 urges the rotating frame 20 in a direction to return from the jumping position to the operation position. However, the front recess 22B2 of the guide groove 22B is engaged with the upper limit stopper shaft 17F, whereby the rotation of the lever bracket 22 around the rotation shaft 19 is restricted. As a result, the turning motion of the turning frame 20 connected to the lever bracket 22 via the connecting spring 24 is also restricted, and the turning frame 20 can hold the jumping position.

  Next, an operation when the gate lock lever 23 is rotated from the opening position to the blocking position will be described.

  First, the gate lock lever 23 in the open position is rotated in the direction opposite to the direction indicated by the arrow C in FIG. 16 with the support shaft 20D as a fulcrum. As a result, as shown in FIG. 15, the front recess 22B2 of the guide groove hole 22B provided in the lever bracket 22 is separated from the upper limit stopper shaft 17F, and the inner peripheral edge on the front end side of the guide groove hole 22B is the upper limit stopper shaft. Abuts on 17F.

  As a result, the rotating frame 20 is rotated in the direction opposite to the direction indicated by the arrow B in FIG. 15 with the rotating shaft 19 as a fulcrum by the spring force of the return spring 21, and as shown in FIG. The inner peripheral edge on the rear end side of 22B stops at a position where it abuts on the upper limit stopper shaft 17F. In this state, the gate lock lever 23 is rotated in the direction opposite to the arrow A direction in FIG. 14 with the support shaft 20D as a fulcrum. Accordingly, as shown in FIG. 13, the rear recess 22B1 of the guide groove 22B is engaged with the upper limit stopper shaft 17F, and the hook 22C is engaged with the lower limit stopper shaft 17G. Thereby, the gate lock lever 23 holds the blocking position, and when the pressing piece 23B presses the gate lock switch 25, it is detected that the gate lock lever 23 is in the blocking position.

  The small excavator 1 according to the present embodiment has the above-described configuration, and the operation thereof will be described below.

  When getting on the small excavator 1, the operator gets on the footrest member 11 through the entrance 12. At this time, the gate lock lever 23 is in the open position to get off the previous time, and the left console device 16 is in the jumping position (see FIG. 5). Accordingly, since the entrance 12 is greatly opened, the operator can easily get on the footrest member 11 through the entrance 12.

  An operator seated in the driver's seat 10 holds the gate lock lever 23 and pushes it down from the open position to the shut-off position. Thereby, the gate 12 can be blocked by the gate lock lever 23 and the left console device 16 can be held at the operation position. With the gate lock lever 23 held at the shut-off position, the operator starts the engine 8 and drives the hydraulic pump.

  In this state, the operator operates the operation lever 26A of the left console device 16 and the operation lever 32A of the right console device 32. Thereby, the pilot pressure from the pilot valve 26 is supplied to the control valve device 33 through each pilot hose 27 in accordance with the operation of the left console device 16 on the operation lever 26 </ b> A. Similarly, the pilot pressure is supplied to the control valve device 33 in accordance with the operation of the right console device 32 on the operation lever 26A. As a result, hydraulic oil for operation is supplied to and discharged from the actuators of the turning device 3 and the front device 5, and the small hydraulic excavator 1 excavates earth and sand using the front device 5 while turning the upper turning body 4. It can be performed.

  Here, in the small hydraulic excavator 1 according to the present embodiment, the left console device 16 disposed on the entrance 12 side is attached to the driver base 9 and the mounting base 17 in the left and right directions. A rotating shaft 19 provided to extend, a rotating frame 20 provided to be rotatable upward and downward with the rotating shaft 19 as a fulcrum, a pilot valve 26 attached to the rotating frame 20, and a rotating frame 20 and the pilot valve 26 from both sides in the left and right directions and the upper side, and a console cover 28 that rotates integrally with the rotating frame 20.

  In this case, since the rotation shaft 19 is arranged so as to be shifted to the right side surface 28D, which is the other side surface of the console cover 28, between the left end 19A of the rotation shaft 19 and the left side surface 28C of the console cover 28, A hose housing space 30 is formed above the hose insertion hole 9 </ b> C of the driver seat base 9. Thereby, each pilot hose 27 connecting between the pilot valve 26 and the control valve device 33 is allowed to pass through the left side of the left end 19A of the rotating shaft 19 and linearly toward the hose insertion hole 9C of the driver seat base 9. Can be arranged.

  Therefore, since it is not necessary to arrange each pilot hose 27 so as to be curved so as to surround the outer peripheral side of the rotary shaft 19, the height of the console cover 28 covering the pilot valve 26, each pilot hose 27, etc. The length dimension in the rear direction can be kept small. As a result, the entire console cover 28 can be reduced in size, and a large installation space for the devices formed around the left console device 16 can be secured.

  Moreover, since each pilot hose 27 is linearly disposed through the left side of the left end 19A of the rotating shaft 19 and into the hose insertion hole 9C of the driver seat base 9, the left console device 16 is moved to the operation position and the jumping position. When the pilot hoses 27 are rotated between the pilot hoses 27, it is possible to prevent the pilot hoses 27 from being greatly bent along with the rotation operation. As a result, the pilot hoses 27 can be prevented from rubbing with each other as the left console device 16 rotates, and the life of each pilot hose 27 can be extended. Furthermore, when the left console device 16 is flipped up, it is possible to suppress the load caused by the bending of each pilot hose 27 from acting on the left console device 16 rotating between the operation position and the jumping position. The operability can be improved.

  Further, in the left console device 16 according to the present embodiment, the hose accommodating space 30 is formed between the left end 19A of the rotating shaft 19 and the left side surface 28C of the console cover 28 with the hose accommodating space 30 positioned behind the pilot valve 26. Yes. Accordingly, each pilot hose 27 connected to the pilot valve 26 linearly extends rearward from the pilot valve 26, so that each pilot hose 27 can be easily controlled through the hose insertion hole 9 </ b> C of the driver seat base 9. Arrangement can be made to the device 33, and workability when arranging each pilot hose 27 can be improved.

  Further, the rotary shaft 19 is arranged so as to be shifted to the right side surface 28 </ b> D of the console cover 28, and a hose accommodating space 30 is formed between the left end 19 </ b> A of the rotary shaft 19 and the left side surface 28 </ b> C of the console cover 28. Therefore, a large hose accommodating space 30 can be formed as much as the rotating shaft 19 is shifted to the right side surface 28D of the console cover 28, and each pilot hose 27 can be accommodated with a margin.

  In the embodiment, in the small excavator 1 in which only the left side in the left and right directions is the entrance 12, only the left console device 16 disposed on the entrance 12 side can be turned up and down. In addition, the case where the gate lock lever 23 is provided only in the left console device 16 is illustrated. However, the present invention is not limited to this. For example, the present invention may be applied to a small hydraulic excavator provided with entrances only on the right side in the left and right directions. In this case, the configuration is such that only the right console device arranged on the right side (the entrance / exit side) in the left and right directions can be rotated upward and downward, and the gate lock lever is provided only in the right console device. can do.

  Further, for example, the present invention may be applied to a small hydraulic excavator provided with entrances on both sides in the left and right directions. In this case, the left and right console devices arranged on both sides of the left and right directions are configured to be rotatable upward and downward, respectively, and gate lock levers are provided on the left and right console devices, respectively. It can be configured.

  Furthermore, in embodiment, the small hydraulic shovel 1 of canopy specification provided with the crawler type lower traveling body 2 is illustrated. However, the present invention is not limited to this. For example, the present invention may be applied to a small hydraulic excavator provided with a wheel-type lower traveling body, or may be applied to a small hydraulic excavator provided with a cab that covers the periphery and upper part of the driver's seat. Good.

DESCRIPTION OF SYMBOLS 1 Small hydraulic excavator 2 Lower traveling body 3 Turning device 4 Upper turning body 5 Front device 6 Turning frame 7 Counterweight 8 Engine (motor)
9 Driver's seat base 10 Driver's seat 12 Entrance / exit 16 Left console device 17 Mounting base 19 Rotating shaft 19A Left end (one end)
20 Rotating frame 23 Gate lock lever 26 Pilot valve 26A, 32A Operation lever 27 Pilot hose 28, 32B Console cover 28C Left side (one side)
28D Right side (the other side)
30 Hose housing space 32 Right console device 33 Control valve device

Claims (3)

A self-propelled lower traveling body, an upper revolving body mounted on the lower traveling body via a swivel device so as to be able to swivel and having a doorway on at least one side in the left and right directions, and the upper revolving body Consisting of a movable front device,
The upper swing body is
A swivel frame forming a support structure;
A counterweight provided on the rear side of the swivel frame to balance the weight with the front device;
A prime mover mounted on the swivel frame located on the front side of the counterweight;
A driver seat pedestal that covers the upper side of the prime mover and is provided on the swivel frame and to which a driver seat is attached;
A left and right console device provided on the driver seat pedestal on both the left and right sides of the driver seat and having an operation lever for operating the front device and the turning device;
Of the left and right console devices, at least one console device located on the entrance side is
A mounting base fixed to the driver seat pedestal;
A rotating shaft provided on the mounting base so as to extend in the left and right directions;
A rotating frame provided so as to be rotatable upward and downward with the rotating shaft as a fulcrum;
A pilot valve attached to the rotating frame and supplying a pilot pressure to the control valve device via a pilot hose according to the operation of the operation lever;
In a small hydraulic excavator comprising a frame that covers the rotating frame and the pilot valve from both the left and right sides and the upper side, and a console cover that rotates integrally with the rotating frame,
A hose accommodating space is formed between one end of the left and right direction of the rotating shaft and one side surface of the console cover,
A small hydraulic excavator characterized in that the pilot hose connected to the pilot valve extends to the control valve device through the hose accommodating space.   2. The small hydraulic pressure according to claim 1, wherein the hose accommodating space is formed between one end of the rotating shaft and one side surface of the console cover, located on the rear side of the pilot valve. Excavator.   The rotating shaft is arranged to be shifted to the other side surface of the console cover, and the hose accommodating space is formed between one end of the rotating shaft and the one side surface of the console cover. The small hydraulic excavator according to claim 1.

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