JP2010018958A - Construction machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a construction machine allowing both levers for dozer and accelerator to be arranged in order and in a compact and concentrated manner on condition that they are arranged close to a console box and capable of improving installation property of both levers and reducing cost of installation. <P>SOLUTION: In this construction machine, a box frame 22 being a skeleton of the console box 21 is mounted on a seat stand of an upper swivel structure provided with an operator's seat, and a rib plate 25 is provided by protruding backward on a rear surface of the box frame 22. Both of the lever 15 for operating the dozer and the lever 16 for the accelerator for adjusting rotational speed of an engine provided close to the operator's seat together with the console box 21 to move the dozer up and down are provided on both of right and left sides of the rib plate 25, respectively, and are coaxially mounted by one shaft body 26. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a construction machine in which a console box and various operation levers are arranged in the vicinity of a driver's seat.

  The background art will be described by taking an open type small hydraulic excavator (mini excavator) having no cabin, which is a preferred example of the present invention, as an example.

  In this hydraulic excavator, as shown in FIG. 6, an upper swing body 2 is mounted on a crawler type lower traveling body 1 so as to be rotatable about a vertical axis, and a boom 3, an arm 4, and a bucket 5 are mounted on the upper swing body 2. And a work attachment 9 comprising cylinders 6 to 8 for booms, arms and buckets for driving them.

  The upper swing body 2 has an upper frame 10, and a driver's seat 12 is provided on the upper surface of the rear portion of the upper frame 10 (on the side opposite to the work attachment 9. .

  On the seat stand 11, console boxes are provided on both the left and right sides of the driver's seat 12 (only the right console box directly related to the present invention is shown in that a dozer and an accelerator lever described later are provided) 13. The console box 13 is provided with electrical components such as a monitor, a key switch, and a light switch necessary for controlling the excavator.

  In addition, a work operation lever 14 is provided at the front of the console box 13, a dozer lever 15 for raising and lowering a dozer (not shown), an accelerator lever 16 for adjusting the engine speed, and the console box 13. Are provided respectively.

  As shown in FIGS. 7 and 8, the dozer lever 15 is mounted on the seat stand 11 by separate lever mounting frames 17 and 18 on the rear lower side of the console box 13 and the accelerator lever 16 on the rear side of the console box 13 (for example, Patent Document 1).

  The upper swing body 2 is provided with various other levers, but the illustration and description are omitted because they are not related to the present invention.

  As shown in FIG. 7, the console box 13 is configured such that a box frame (a variety of shapes are known) 19 as a skeleton is covered with a cover 20 made of synthetic resin (see Patent Document 2).

The console box 13 may be provided with a boarding / blocking lever that automatically stops the engine operation or work operation when the operator gets off, and the console box 13 may be configured to rotate together with the boarding / alighting lever. Since it is not directly related to the present invention, illustration and explanation are omitted.
JP 2001-107396 A JP 2005-105591 A

  However, according to the known technique disclosed in Patent Document 2 and the like, the console box 13 installed near the driver's seat 12 and the dozer and accelerator levers 15 and 16 are separated into separate frames (box frame 19 and lever mounting frame 17, respectively). , 18) is distributed and mounted on the seat stand 11, so that there is no unity as equipment around the driver's seat 12, giving a cluttered feeling, and increasing the installation space, especially mini The space around the driver's seat, such as an excavator, was disadvantageous for machines with small space.

  In addition, since both levers 15 and 16 are attached to separate frames, their assembling properties are poor.

  Furthermore, the cost is increased due to poor assembly and an increased number of parts for mounting the lever.

  Therefore, the present invention can be installed in a compact and orderly manner under the condition that both the dozer and accelerator levers are arranged in the vicinity of the console box, improve the assembly of both levers, and reduce the cost. A construction machine that can be realized is provided.

  The invention of claim 1 is provided with a console box in which electrical components and the like are accommodated in the vicinity of the driver's seat, a dozer lever for raising and lowering the dozer, and an accelerator lever for adjusting the engine speed. In a construction machine configured by covering a box frame as a skeleton with a cover, a rib plate protrudes backward on the back of the box frame, and a lever shaft protrudes on each of the left and right sides of the rib plate. The dozer lever is attached to the other lever shaft, and the accelerator lever is attached to the other lever shaft.

  According to a second aspect of the present invention, in the configuration of the first aspect, both lever shafts for the dozer lever and the accelerator lever are provided coaxially with a rib plate interposed therebetween.

  According to a third aspect of the present invention, in the configuration of the second aspect, one shaft body is provided in a state of projecting to the left and right sides through the rib plate, one projecting portion being a lever shaft for a dozer lever, and the other projecting portion. Is the lever shaft for the accelerator lever.

  According to a fourth aspect of the present invention, in the configuration according to any one of the first to third aspects, a cover mounting shaft for mounting a cover of a console box is provided on the rib plate so as to protrude from the left and right sides of the rib plate.

  According to the present invention, the following effects can be obtained.

  (I) Since the dozer and accelerator levers are attached to the rib plate provided on the box frame, the equipment around the driver's seat including both levers is compactly and orderly compared to when both levers are attached to separate frames. be able to.

  (Ii) Since both levers are mounted in an open space on the back side of the box frame, not in the box, and on both sides of the rib plate, the levers can be assembled easily while being arranged compactly.

  (Iii) The strength of the box frame can be increased by the reinforcing effect of the rib plate.

  Further, according to the invention of claim 2, since both lever shafts are concentrated on the same axis, the equipment around the driver's seat can be gathered more compactly.

  According to the invention of claim 3, since the dozer lever shaft and the accelerator lever shaft are formed by providing one shaft body in a state where the rib plate penetrates, the assembling property of both levers including the mounting of the lever shaft is further improved. Further, the cost can be reduced by improving the assembly property and sharing one shaft body for both levers (reducing the number of parts).

  According to the invention of claim 4, since the cover of the console box can be attached in a both-sided state by the cover attachment shaft provided on the rib plate, the cover attachment strength can be increased.

  An embodiment of the present invention will be described with reference to FIGS.

  In the following embodiments, a small hydraulic excavator (open type mini excavator) is taken as an application object in accordance with the description of the background art.

  The console box 21 is provided on the upper surface of the seat stand 11 on the upper swing body, which is the same as the known technique shown in FIGS.

  The console box 21 is configured by covering the box frame 22 shown in FIGS. 1 to 5 with a synthetic resin cover 23 shown by a two-dot chain line in FIGS. 4 and 5, and various electrical components not shown in the console box 21. Is incorporated.

  The box frame 22 includes a frame body 24 and a rib plate 25.

  The frame main body 24 includes a lever attachment portion 24b to which the operation control lever 14 is attached at the front end portion of the main portion 24a bent in a dogleg shape, and the main portion 24a is attached to the upper surface of the seat stand 11.

  For simplification of the drawing, the mounting structure (mounting holes, nuts, etc.) of the main portion 24a to the seat stand 11 and the mounting structure of the work operation lever 14 to the lever mounting portion 24b are not shown.

  The rib plate 25 is provided on the back surface of the main portion 24a of the frame body 24 so as to project rearward in a state of partitioning the back surface to the left and right, and almost the entire length from near the front end to the rear end of the main portion 24a. Yes.

  A single shaft 26 is provided at the rear end of the rib plate 25 so as to penetrate the rib plate 25 and project to the left and right sides. The right projecting portion (dozer lever shaft) 26a includes the dozer lever 15 and the left projecting portion (accelerator). The lever 16 is attached to the lever shaft 26b.

  That is, both levers 15 and 16 are provided coaxially with the rib plate 25 sandwiched between them.

  Further, a cover mounting shaft (pipe) 27 is provided in a state where the rib plate penetrates in a front and upper position with respect to the shaft body 26 in the middle portion in the front-rear direction of the rib plate 25, and the rear end portion of the cover 23 is the cover mounting shaft 27. Mounted on.

  Note that accessories (such as a stopper for regulating the lever operation amount) of the dozer and accelerator levers 15 and 16 are also attached to the rib plate 25.

  As described above, the rib frame 25 is provided on the box frame 22 which is the skeleton of the console box 21, and the dozer and accelerator levers 15 and 16 installed in the vicinity of the driver's seat 12 together with the console box 21 are connected to the left and right sides of the rib plate 25. Since both the levers 15 and 16 are mounted coaxially on both sides (the rib plate 25 as a common frame), both levers 15 and 16 are compared with a known technique in which both levers 15 and 16 are distributed and mounted on different frames. The equipment around the driver's seat 12 including the can be gathered compactly and orderly.

  For this reason, it is advantageous for a small construction machine having a small space around the driver's seat like the mini excavator exemplified in this embodiment.

  In addition, the levers 15 and 16 are mounted in an open space on the back side of the box frame 22 rather than in a closed box, and are distributed to the left and right with the rib plate 25 sandwiched therebetween, so that both levers are arranged in a concentrated manner. Assembly becomes easy.

  Further, since the single shaft body 26 is shared by the levers 15 and 16, the number of parts can be reduced, and the ease of assembly as described above can be improved, so that the cost can be reduced.

  In addition, the strength of the box frame 22 can be increased by the reinforcing effect of the rib plate 25.

  Moreover, since the cover 23 of the console box 21 can be attached in a both-sided manner by the cover attachment shaft 27 provided in the rib plate 25 in a state of penetrating left and right, the cover attachment strength can be increased.

Other Embodiments (1) In the above-described embodiment, the shaft body 26 and the cover mounting shaft 27 are provided as a single shaft in a state of penetrating the rib plate. However, the shaft body 26 includes a dozer lever shaft 26a and an accelerator lever shaft 26b. The cover mounting shaft 27 may be divided into a right cover mounting shaft and a left cover mounting shaft, and may be separately provided on the left and right side surfaces of the rib plate 25 in a coaxial arrangement.

  (2) When the dozer lever shaft 26a and the accelerator lever shaft 26b are provided separately on both side surfaces of the rib plate 25, the lever shafts 26a and 26b may be provided so as to be displaced.

  (3) The present invention is not limited to an open type small excavator having no cabin (mini excavator), but may be applied to a general hydraulic excavator with a cabin and various construction machines other than the hydraulic excavator in the same manner as described above. Can do.

It is a perspective view of a console box (cover omitted) showing an embodiment of the present invention. It is an enlarged view of FIG. FIG. 3 is a perspective view of the console box as viewed from the opposite side to FIG. 2. It is a top view of a console box. FIG. 1 is a schematic side view of a small hydraulic excavator to which the present invention is applied. It is the figure which expanded the console box and its peripheral part among FIG. FIG.

Explanation of symbols

12 Driver's seat 15 Dozer lever 16 Accelerator lever 21 Console box 22 Box frame 23 Cover 24 Box frame main body 24a Main part 24b Lever mounting part 25 Rib plate 26 Shaft body 26a Shaft body right side protruding part (dozer lever shaft)
26b Left side protruding part of axle (accelerator lever shaft)
27 Cover mounting shaft

Claims (4)

  In the vicinity of the driver's seat, there are provided a console box for accommodating electrical components, a dozer lever for raising and lowering the dozer, and an accelerator lever for adjusting the engine speed. The console box has a box frame as a skeleton. In the construction machine configured to be covered with a cover, a rib plate is projected rearward on the back surface of the box frame, and a lever shaft is projected on each of the left and right sides of the rib plate, and the dozer lever is provided on one lever shaft, A construction machine, wherein the accelerator lever is attached to each of the other lever shafts.   The construction machine according to claim 1, wherein both lever shafts for the dozer lever and the accelerator lever are provided coaxially with the rib plate interposed therebetween.   One shaft body is provided in a state of projecting to the left and right sides through the rib plate, one projecting portion being a lever shaft for a dozer lever, and the other projecting portion being a lever shaft for an accelerator lever. The construction machine according to claim 2.   The construction machine according to any one of claims 1 to 3, wherein a cover mounting shaft for mounting the cover of the console box is provided on the rib plate so as to protrude on both the left and right sides of the rib plate.

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