JP2023067237A - Work machine - Google Patents

Abstract

To provide a work machine with improved utilization of space below a cabin in a vibration isolation structure of the cabin.SOLUTION: An excavating machine has a vibration isolation structure that supports a cabin arranged on a revolving frame that is swingably provided above a lower traveling body, and, in a front vibration isolation structure 98 that supports a front side of the cabin, has a plurality of supports 81a, 81b fixed to the revolving frame and a plurality of mounts 82a, 82b supported by the plurality of supports 81a, 81b. At least one of the mounts 82a is arranged in a space within a projecting portion 65 projecting upwardly from a front frame plate 63a forming part of a bottom plate of the cabin 10.SELECTED DRAWING: Figure 8

Description

The present invention relates to a working machine equipped with a cabin.

Conventionally, a working machine has a self-propelled lower traveling body, an upper revolving body provided above the lower traveling body so as to be able to turn, and a work machine supported in a front part of the upper revolving body so as to be vertically rotatable. It has The upper revolving body has a revolving frame that forms a support structure, and a cabin in which an operator who operates the working machine rides is mounted on the upper part of the revolving frame.

An anti-vibration structure is provided between the revolving frame and the cabin to reduce vibration transmitted to the cabin through the revolving frame during work. As an anti-vibration structure, there is known an example in which an anti-vibration material is provided between the revolving frame and the cabin. For example, in the working machine disclosed in Patent Literature 1, anti-vibration materials are provided at the four corners of the rectangular bottom plate of the cabin.

Patent No. 6647997

The vibration-isolating material employed in the vibration-isolating structure of the cabin of the working machine disclosed in Patent Document 1 is a so-called liquid-filled mount that has a cylindrical container portion that encloses a viscous fluid. When the cabin is supported by such anti-vibration materials, the anti-vibration materials are arranged in a space of constant height between the revolving frame and the floor plate of the cabin. On the other hand, if an attempt is made to use the space between the bottom plate of the cabin and the revolving frame to arrange some kind of member, there will be mutual interference with the container portions of the four anti-vibration materials placed below the bottom plate of the cabin. Other members must be placed where they do not. In this way, the use of the space below the cabin is physically restricted by the vibration-damping material, and there is a problem that the configuration that can be arranged in the space below the cabin is limited.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a working machine in which the use of the space below the cabin is improved in the vibration isolation structure of the cabin.

A working machine according to the present invention is a working machine that includes a cabin, and is arranged in a frame on which the cabin is arranged, and between a plurality of vibration-damping materials that support the cabin in vibration isolation, and the frame and the cabin. a plate member arranged to support at least one of the plurality of vibration-isolating members and to arrange the vibration-isolating member above other vibration-isolating members.

In a working machine according to another aspect of the present invention, the plate member has a flat plate portion and a projecting portion that protrudes upward from the flat plate portion, and the vibration-absorbing material extends from the flat plate through the projecting portion. It is arranged apart from the part.

In a working machine according to another aspect of the present invention, the plate member has an attachment hole to which a vibration isolator other than the vibration isolator disposed via the projecting portion can be attached.

In a working machine according to another aspect of the present invention, the plate member has a stepped portion between the projecting portion of the flat plate portion and the mounting hole.

In a working machine according to another aspect of the present invention, the bottom plate of the cabin has an overhanging portion projecting upward, and the projecting portion is arranged below the overhanging portion.

In a working machine according to another aspect of the present invention, the vibration-damping material includes: a cylindrical container portion containing a viscous fluid; a flange portion projecting outward from an opening end of the container portion; and the container portion. and an elastic body covering the opening of the.

ADVANTAGE OF THE INVENTION According to this invention, in the vibration-isolation structure which carries out vibration-isolation support of a cabin, by devising arrangement|positioning of several vibration-isolation materials, the space utilization degree of the lower part of a cabin can be improved.

1 is a left side view of an excavating machine according to one embodiment of the present invention; FIG. 1 is a perspective view from the left front of an excavating machine according to an embodiment of the present invention; FIG. 1 is a left rear perspective view of an excavator according to an embodiment of the present invention; FIG. 1 is a perspective view showing the arrangement of cabins on a revolving frame of an excavating machine according to one embodiment of the present invention; FIG. 1 is a plan view showing the arrangement of cabins on a revolving frame of the excavating machine according to one embodiment of the present invention; FIG. It is a perspective view showing the support structure of the cabin concerning one embodiment of the present invention. It is a top view showing the support structure of the cabin concerning one embodiment of the present invention. It is a front view showing a front support structure of a cabin concerning one embodiment of the present invention. 1 is a perspective view from below and rear of a front support structure for a cabin according to an embodiment of the present invention; FIG. 1 is a top front perspective view of a cabin front support structure according to an embodiment of the present invention; FIG. 1 is a cross-sectional view of a cabin front support structure according to an embodiment of the present invention; FIG. It is a figure which shows the modification of the front support structure of the cabin which concerns on one Embodiment of this invention. It is a figure which shows the modification of the front support structure of the cabin which concerns on one Embodiment of this invention. It is a figure which shows the modification of the front support structure of the cabin which concerns on one Embodiment of this invention. It is a figure which shows the modification of the front support structure of the cabin which concerns on one Embodiment of this invention.

An object of the present invention is to improve the degree of freedom in arranging members in the space below the cabin by devising the mounting structure of the vibration-damping material in the structure below the cabin of the working machine. BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with reference to the drawings.

In the present embodiment, as a working machine according to the present invention, an excavating working machine, which is a revolving working vehicle, will be described as an example. However, the working machine according to the present invention is not limited to excavating machines, and can be widely applied to other working machines such as crane machines, skid steer loaders, and wheel loaders.

The overall configuration of the excavator 1 according to this embodiment will be described. As shown in FIGS. 1 to 3, the excavating work machine 1 includes a self-propellable traveling vehicle body (machine body) composed of a lower traveling body 2A and an upper revolving body 2B. A soil device 4 is provided.

The lower traveling body 2A has a pair of left and right crawler-type traveling portions 5, 5 and a body frame 6 as a base interposed between the left and right traveling portions 5, 5. As shown in FIG.

The traveling portion 5 has a structure in which crawler belts are wound around sprockets, idlers, and a plurality of rollers supported by the body frame 6 . The traveling portion 5 has a driving sprocket 5a, which is a driving wheel, at its rear end.

A soil removal device 4 is attached to the front side of the body frame 6 . The earth unloading device 4 includes a support frame 40 and a blade 41 that is a earth unloading plate supported by the support frame 40 . The earth unloading device 4 including these configurations is configured generally bilaterally symmetrical as a whole.

The support frame 40 is supported so as to be vertically rotatable with respect to the lower traveling body 2A, and includes left and right arms 43 extending in the front-rear direction between the left and right traveling portions 5,5. Base ends of the left and right arms 43 are supported by support brackets 42 provided on the front part of the body frame 6 with the left and right directions as the rotation axis direction. The support frame 40 rotates up and down as the blade cylinder 44 expands and contracts. That is, when the blade cylinder 44 expands and contracts, the blade 41 rotates up and down via the support frame 40 .

The upper rotating body 2B has a rotating frame 7 mounted so as to be able to rotate with respect to the lower traveling body 2A. The revolving frame 7 is connected to the body frame 6 via a revolving bearing 8, and is driven by a revolving motor (not shown) so as to be able to turn in either the left or right direction about the vertical axis with respect to the body frame 6. is provided. By connecting the body frame 6 and the revolving frame 7 in this way, the upper revolving body 2B revolves with respect to the lower traveling body 2A.

An excavator 3 is attached to the front side of the upper revolving body 2B. The excavator 3 has a boom 32 forming a base portion thereof, an arm 33 connected to the tip of the boom 32 , and a bucket 34 attached to the tip of the arm 33 . The excavator 3 also has a boom cylinder 35 that rotates the boom 32 , an arm cylinder 36 that rotates the arm 33 , and a bucket cylinder 37 that rotates the bucket 34 .

A base end of the boom 32 is supported by a boom support bracket 31 . The boom support bracket 31 is supported by a bracket mounting portion 28 (see FIG. 1) projecting from the revolving frame 7 via a swing shaft whose rotation axis direction is the vertical direction.

The boom support bracket 31 includes a boom support portion 22 that rotatably supports the base end of the boom 32 with the horizontal direction as the direction of the rotation axis, a boom cylinder support portion 23 that supports the lower end of the boom cylinder 35 , and a swing cylinder 38 . and a swing cylinder connecting portion 25 that connects the tip ends of the rods. The operation of the swing cylinder 38 rotates the boom support bracket 31 about the swing axis, thereby rotating the excavator 3 left and right.

The boom cylinder 35, the arm cylinder 36, the bucket cylinder 37, and the swing cylinder 38 are all hydraulic cylinders operated by pressure oil discharged by a hydraulic pump (not shown). In the excavator 3, the bucket 34 is detachably mounted as a working attachment, and depending on the work content, other attachments such as a pincher (fork) or a crusher (breaker) may be used instead of the bucket 34. be worn.

The upper revolving body 2B includes a cabin 10 containing a driving unit for an operator to drive and operate the traveling unit 5 and the work machine, a prime mover unit 11 containing an engine, a battery, etc., a fuel tank for the engine and a hydraulic cylinder. A tank portion 12 is provided for accommodating a hydraulic oil tank of the. A cabin 10 is arranged on the front left portion of the revolving frame 7 in plan view, and a tank portion 12 is arranged on the right side of the cabin 10 . A prime mover section 11 is arranged behind the cabin 10 on the revolving frame 7 . Further, a counterweight 9 for balancing the weight with the excavator 3 is attached to the rear side of the upper swing body 2B.

A counterweight 9 and a rear cover 13 cover the rear portion of the motor portion 11 of the upper swing body 2B. The lower left side of the cabin 10 of the upper revolving body 2B is covered with a lower left exterior cover 14, and the lower front side of the cabin 10 is covered with a front exterior cover 15. As shown in FIG. By removing the lower left exterior cover 14 and the front exterior cover 15, maintenance of parts and the like arranged below the bottom plate of the cabin 10 is possible.

A driver's seat is provided in the cabin 10, and around the driver's seat are a plurality of traveling levers for causing the lower traveling body 2A to travel, turning the upper revolving body 2B, and operating the work equipment. An operation pedal, a work operation lever, an operation panel section, and the like are provided.

In the excavating work machine 1 having the above configuration, the operator in the cabin 10 appropriately operates the travel lever, the work operation lever, and the like to perform desired operations and work. For example, by operating the traveling lever, the traveling unit 5 is moved forward and backward straightly and left and right turning, and by operating the work operation lever, excavation work by the excavator 3, or earth removal work and land leveling work by the earth removal device 4. is done.

The revolving frame 7 on which the cabin 10 is arranged and the vibration isolation structure of the cabin 10 will be further described. 2 and 4 to 7, illustration of the bracket mounting portion 28 in the revolving frame 7 is omitted.

First, the configuration of the revolving frame 7 will be described. The revolving frame 7 is a support structure for the upper revolving body 2B. It has a front horizontal rib 74 and a rear horizontal rib 75 connecting the left vertical rib 72 and the right vertical rib 73 on the front and rear sides.

The substrate 71 has a shape in which the left and right ends and the rear end are formed in a substantially arc shape in plan view. Note that the term "substantially arcuate" as used herein includes not only a simple arc, but also a shape in which a plurality of arcs with different central angles are continuous and a shape that partially includes a straight line. A hole 78 is provided in the central portion of the base plate 71, which is the center of rotation, from which the tip of a swivel joint 79, the base end of which is fixed to the body frame 6, protrudes.

The right vertical rib 73 is provided linearly along the front-rear direction. The left vertical rib 72 is provided parallel to the right vertical rib 73 on the rear side, and is provided obliquely so that the front end is bent to the right by being bent in the middle.

A support plate 76 extending leftward from the side surface of the left vertical rib 72 is provided on the rear left side of the substrate 71 . The support plate 76 supports a swing cylinder support portion 77 that supports the base end portion of the swing cylinder 38, and also functions as a partition that separates the layout area of the cabin 10 and the layout area of the prime mover section 11 on the substrate 71.

A cabin installation portion 80 is provided on the substrate 71 (see FIGS. 6 and 7). The cabin 10 is vibration-isolated and supported by a vibration-isolating structure provided in the cabin installation portion 80 .

Further, in the excavator 1 according to the present embodiment, the boom support bracket 31 is attached to the right side of the cabin installation portion 80 in the revolving frame 7 in order to secure the range of motion of the boom 32 in the longitudinal direction on the right side of the cabin 10 . There is a need. Therefore, the mounting position of the boom support bracket 31 on the board 71 is slightly to the right of the center of the front side of the board 71 .

A configuration of the cabin 10 will be described. The cabin 10 has a substantially rectangular box shape as shown in FIGS. It consists of windows, etc. The term "substantially rectangular box shape" as used herein includes not only a simple rectangular parallelepiped but also a shape that is polygonal in plan view and side view, and a shape in which a part of the outer surface includes an inclined surface or a curved surface.

A boarding/alighting door 55 is provided on the left side of the cabin 10 so as to be able to be opened and closed, and the operator can board/alight from the cabin 10 via the boarding/alighting door 55 . A plurality of windows 56a, 56b, 56c, 56d, 56e, 56f, and 56g are provided on the front, rear, left, and right of the cabin 10 by fitting a transparent plate such as glass into the frame 51 and the door frame of the passenger door 55. . Accordingly, the operator in the cabin 10 can visually confirm the surroundings of the excavator 1 from the driver's seat. Further, by providing a window 56g also on the front side of the ceiling 52 of the cabin 10, it is possible for the operator to visually confirm an upper obstacle or the like.

The outer shape of the revolving frame 7 is designed to have an arcuate curve whose rear end portion is within the lateral width of the left and right traveling portions 5, 5 during revolving. Further, the shape of the cabin 10 in a plan view is not quadrangular but substantially pentagonal (see FIG. 5). That is, the right side of the cabin 10 is a boundary with the movable area in the longitudinal direction of the boom 32 and is linear in plan view, but the left side is two sides with an obtuse angle along the outer shell of the revolving frame 7. It has a shape consisting of Therefore, the shape of the cabin 10 in plan view is substantially pentagonal. By making the shape of the cabin 10 in plan view into a shape that fits within the contour of the revolving frame 7 , the upper revolving body 2</b>B can turn within the left and right widths of the left and right traveling parts 5 , 5 . That is, the excavating machine 1 is configured to be capable of performing a small backward turning operation.

As shown in FIG. 4 , the rear wall portion 58 of the cabin 10 is provided with a tapered portion 59 that is inclined forward from the rear of the cabin 10 so that the upper side of the cabin 10 projects further rearward than the lower end of the cabin 10 . there is Therefore, the area of the ceiling 52 of the cabin 10 is larger than the area of the bottom, and the center of gravity (center of mass) of the cabin 10 is closer to the rear.

The cabin 10 has an operating section support plate (not shown) forming a floor and a bottom frame 61 surrounding the operating section support plate. The driving portion support plate and the bottom frame 61 constitute a bottom plate of the cabin 10 by being connected to each other. 6 and 7, the illustration of the operating section support plate is omitted, and the state in which the bottom frame 61 is arranged in the cabin installation section 80 described later is illustrated.

The bottom frame 61 of the cabin 10 has a front frame plate 63a, a left frame plate 63b, a rear frame plate 63c and a right frame plate 63d. The front frame plate 63a, the left frame plate 63b, the rear frame plate 63c, and the right frame plate 63d are made of elongated plate materials with different shapes, and are connected to each other by fastening members such as bolts at their ends so that they are approximately A rectangular bottom frame 61 is constructed. Note that the bottom frame 61 includes a reinforcing member 64 that reinforces the space between the frame plates as necessary. Here, the term "substantially rectangular" includes not only a simple rectangle, but also quadrilaterals with different side lengths and polygons having obtuse corners on some of the four sides.

In addition, the front frame plate 63a has an overhanging portion 65 projecting upwards from the right end portion of the flat plate surface. The protruding portion 65 is configured so that a mount 82a as a vibration isolator, which will be described later, can be accommodated in its internal space.

A support structure for the cabin 10 will be described. A cabin installation portion 80 for installing the cabin 10 on the base plate 71 of the revolving frame 7 is provided with a vibration isolation structure including a plurality of (four in this embodiment) vibration isolation materials, as shown in FIGS. It is More specifically, four supports 81a, 81b, 81c, and 81d fixed on the substrate 71 (hereinafter, the supports 81a, 81b, 81c, and 81d are collectively referred to as the support 81); , four mounts 82a, 82b, 82c, and 82d (hereinafter, the mounts 82a, 82b, 82c, and 82d are collectively referred to as mounts 82) supported by the respective supports 81 and connected to the bottom plate of the cabin 10. are placed. The support 81 and the mount 82 are arranged at positions corresponding to the four corners of the substantially rectangular bottom of the cabin 10 .

The front of the cabin 10 is supported by a front anti-vibration structure 98 including a right front support 81a, a right front mount 82a, a left front support 81b and a left front mount 82b. It is supported by a rear anti-vibration structure 99 including a rear mount 82c, a right rear support 81d and a left rear mount 82d.

The supports 81 each have a predetermined length (height) in the vertical direction, and are fixed to the base plate 71 of the revolving frame 7 by welding or the like. The predetermined length (height) here is, for example, about 1.2 to 1.5 times the cylinder diameter of the swing cylinder 38, and is the height of the cylinder of the container portion 83 in the mount 82, which will be described later. It is the length that becomes taller than the height. These supports 81 form a space in which members can be arranged between the substrate 71 and the bottom plate of the cabin 10 . Therefore, between the base plate 71 and the bottom plate of the cabin 10 , the swing cylinder 38 can be arranged obliquely across the bottom of the cabin 10 . Note that the vertical dimension (height) of each support 81 may not be the same, and the length suitable for each position is selected in consideration of the shape of the bottom plate of the cabin 10 and the like.

Each of the supports 81 is formed into a predetermined shape by bending and/or welding a metal plate. More specifically, the support body 81a has a substantially C shape in a front view in order to secure a space for the cylinder rod of the swing cylinder 38 to protrude from the front end of the revolving frame 7 and extend and contract. there is Further, the support body 81b has a substantially C shape when viewed from the front and a substantially L shape when viewed from above. Further, the support 81c has a substantially inverted U shape when viewed from the side. In addition, the “U-shape” is not limited to a smoothly curved shape, and includes a U-shape with a flat bottom. In addition, the term "inverted U-shape" refers to an arrangement in which two ends of the U-shape are arranged downward and the U-shape is open downward. The support 81 d has a substantially L shape when viewed from the side, and one end of the L shape is fixed to the substrate 71 and the other end is fixed to the rear lateral rib 75 . In this way, the support bodies 81 do not have to have the same shape as long as they have rigidity (section modulus equal to or greater than a predetermined value) capable of withstanding the load of the cabin 10. An appropriate shape is selected in relation to the arrangement of the left vertical rib 72 and the rear horizontal rib 75, the specifications of the mount 82, and the like.

The mount 82 is a vibration isolator that absorbs vibration transmitted to the revolving frame 7 via the boom support bracket 31 during excavation work and suppresses vibration transmission to the cabin 10 on which the operator rides. The mount 82 is, for example, a liquid-filled mount, and includes a cylindrical container portion 83 for containing a viscous fluid therein, an elastic body 84 provided above the container portion 83, and a stud fixed to the elastic body 84. 85.

The elastic body 84 is a tubular body formed of rubber so that the upper side protrudes from the outer shell of the container part 83 and the lower side fits into the opening of the container part 83, and functions as a stopper against the load in the compression direction. . A flange portion 86 is provided at the upper end of the container portion 83, and the viscous fluid is accommodated by fixing the lower surface of the upper projecting portion of the elastic body 84 to the upper surface of the flange portion 86 using a close contact method such as baking adhesion. The container portion 83 is sealed by the elastic body 84 . That is, the elastic body 84 functions as a lid that seals the viscous fluid contained in the container portion 83 . The flange portion 86 is provided with a plurality of bolt insertion holes 87 through which fixing bolts can be inserted.

A stud 85 is held in the upper center of the elastic body 84 . The stud 85 is for connecting to the bottom plate of the cabin 10, and is provided with a threaded hole into which a threaded portion of a bolt is screwed. Mount 82 and cabin 10 are connected by screwing the bottom plate of cabin 10 to stud 85 .

When vibration is applied to the mount 82 having such a configuration, the vibration is damped by the viscous resistance of the viscous fluid contained in the container portion 83 . Silicone oil can be used as the viscous fluid.

In the rear vibration isolation structure 99 in the cabin installation portion 80, the mount 82c is directly supported by the support 81c, and the mount 82d is directly supported by the support 81d. That is, the mounts 82c and 82d have bolts (not shown) inserted through the bolt insertion holes of the flange portion 86 and the container portion 83 inserted through vibration-isolating material attachment holes provided in the upper flat portions of the support members 81c and 81d, respectively. ) are attached to each of the supports 81c and 81d.

In addition, in the front antivibration structure 98 in the cabin installation portion 80, the mounts 82a and 82b are supported by the supports 81a and 81b via the intermediate plate member 91. As shown in FIG.

The intermediate plate member 91 is formed of a metal plate material and has a flat plate portion 92 elongated in the left-right direction and a projecting portion 93 for supporting the mount 82a on the left end side of the flat plate portion 92 . As shown in FIGS. 8 to 11, the intermediate plate member 91 is installed between the support 81a and the support 81b. Note that FIG. 11 shows the AA cross section in FIG.

The flat plate portion 92 has a stepped portion 94 that continuously connects the first plate portion 101 and the second plate portion 102 having different heights. The stepped portion 94 is formed by attaching a plate surface (a first plate portion 101 and a second plate portion 101 and a second plate portion) parallel to the surface of the base plate 71 of the turning frame 7 to the intermediate plate member 91 supported by the supports 81a and 81b having different heights. 102), and functions as a height adjuster. The stepped portion 94 is formed as an inclined surface portion that slopes downward to the left from the left-right center of the flat plate portion 92, and the first plate portion 101 is positioned at a lower height than the second plate portion 102. there is Note that the stepped portion 94 may be a surface portion perpendicular to the horizontal first plate portion 101 and the second plate portion 102 .

The protruding portion 93 is formed by bending a metal plate material, and has a generally inverted U-shaped shape composed of an upper flat plate portion 95 formed with an engaging surface with the flange portion 86 of the mount 82a and a pair of leg portions 97. (See Figures 8 and 9). The lower end of the leg portion 97 of the protruding portion 93 is fixed by welding onto the second plate portion 102 on the right end side of the flat plate portion 92 elongated in the left-right direction. The entire lower end of the leg portion 97 of the protruding portion 93 may not be fixed to the flat plate portion 92, and a portion may protrude beyond the width of the flat plate portion 92 as shown in FIG. The lower end of the leg portion 97 of the projecting portion 93 may be bridged over a hole portion 96 provided in the flat plate portion 92 for passing a cable or the like that supplies electric power to the electrical components of the operating portion. Further, the portion of the lower end of the leg portion 97 of the projecting portion 93 that is not directly connected to the flat plate portion 92 may be supported by another member such as an operating portion support plate (not shown).

The protruding portion 93 is configured such that the length of the leg portion 97 is equal to or longer than the vertical length of the container portion 83 of the mount 82a. The lower end of the container portion 83 is separated from the upper surface of the second plate portion 102 . An upper flat plate portion 95 of the protruding portion 93 is provided with bolt insertion holes that communicate with the bolt insertion holes 87 provided in the flange portion 86 of the mount 82a. The mount 82a is attached to the protruding portion 93 by inserting the container portion 83 through the vibration isolator mounting hole and fastening the flange portion 86 and the upper flat plate portion 95 of the protruding portion 93 with bolts and nuts. As a result, the container portion 83 of the mount 82 a is arranged in the space between the flat plate portion 92 and the projecting portion 93 of the intermediate plate member 91 .

The first plate portion 101 on the left end side of the flat plate portion 92 has a vibration isolator mounting hole 89 for mounting the mount 82b and a bolt insertion hole communicating with the bolt insertion hole 87 provided in the flange portion 86 of the mount 82b. is provided. The mount 82b is attached to the intermediate plate member 91 by inserting the container portion 83 of the mount 82b into the vibration isolator attachment hole 89 and fastening the flange portion 86 and the first plate portion 101 with bolts and nuts. The container portion 83 of the mount 82b is arranged in the space between the intermediate plate member 91 and the substrate 71. As shown in FIG. That is, the intermediate plate member 91 whose right end is supported by the support 81a and whose left end is supported by the support 81b functions as a pedestal for arranging the mount 82a at a position higher than the other mounts 82b, 82c, and 82d. .

A front frame plate 63a is provided on an intermediate plate member 91 supported by a mount 82a on the right end side and a mount 82b on the left end side. On one end side (right end side) of the front frame plate 63a, an overhanging portion 65 is provided that projects upward from the plate surface. The projecting portion 65 has a rectangular box shape and is open at the bottom. A bolt insertion hole 67 is provided in the central portion of the upper flat portion 66 of the projecting portion 65 . The mount 82a supported by the projecting portion 93 is accommodated in the inner space of the overhanging portion 65, and the bolt 88 is inserted into the bolt insertion hole 67 of the upper flat portion 66 of the overhanging portion 65 so that the screw provided in the stud 85 of the mount 82a is inserted. The front frame plate 63a and the mount 82a are connected by screwing them into the holes.

When installing the cabin 10 on the revolving frame 7 , the driver's seat and the driver's support plate on which the operating levers and the like are mounted are connected to the bottom frame 61 . At this time, the driving portion support plate is connected to the mounts 82b, 82c, 82d via bolts. As a result, the bottom plate of the cabin 10, in which the bottom frame 61 and the driving portion support plate are integrated, is supported by the four mounts 82a, 82b, 82c, 82d. Furthermore, by connecting the frame body 51 of the cabin 10 to the bottom plate, the installation of the cabin 10 on the revolving frame 7 is completed.

Of the four mounts 82 in the cabin installation portion 80, the mount 82a that supports the right front of the cabin 10 is arranged at a position higher than the other three mounts 82b, 82c, and 82d. The container portion 83 does not protrude into the space between the base plate 71 of the swivel frame 7 and the bottom plate of the cabin 10 at the right front. Thereby, a space in which the swing cylinder 38 can be arranged can be provided under the mount 82a. The swing cylinder 38 is horizontally installed from the center position of the rear end of the cabin installation portion 80 so as to pass under the mount 82a arranged on the right front side, and the tip of the rod is a boom support bracket provided near the front center of the swing frame 7. 31 is connected to the swing cylinder connecting portion 25 . Thus, by devising the support structure of the mounts 82a and the shape of the front frame plate 63a, the four mounts 82 can provide the cabin 10 with a vibration isolation effect.

Note that the four mounts 82 may not all have the same specifications. The cabin 10 is provided with a driver's seat and a seat mount that supports the driver's seat on the rear lower side, and the shape of the cabin 10 in a side view is a shape in which the upper rear end protrudes rearward. The center of gravity of 10 will be in a position biased toward the rear. Therefore, regarding the mounts 82c and 82d that support the rear portion of the cabin 10, in order to cope with the load on the rear portion that is heavier than the front portion of the cabin 10, for example, the thickness of the elastic body 84 in the upper portion of the container portion 83 is increased so that the cabin A thicker one than the mounts 82a, 82b that support the front part of the 10 in an anti-vibration manner may be employed. In addition, in order to reduce the height of the overhanging portion 65 of the front frame plate 63a, the length of the tubular container portion 83 of the mount 82a is shortened and the diameter of the tubular portion is increased so that the elastic body 84 is The increased surface area may be balanced in terms of load bearing capability with the other three mounts 82b, 82c, 82d.

Further, each of the mounts 82 is arranged at intervals in the front, rear, left, and right directions of the area covered by the bottom plate of the cabin 10 on the base plate 71 of the swing frame 7 . The area covered by the bottom plate of the cabin 10 is also the area defined by the bottom frame 61 . The four mounts 82 are arranged at positions corresponding to the four corners of the substantially rectangular bottom plate of the cabin 10, and are formed by virtually connecting the mounts 82 arranged at the four corners in the front, rear, left, and right in a plan view. Shapes do not have to be exact rectangles, but can be quadrilaterals with different side lengths. For example, considering the shape of the bottom plate of the cabin 10, each of the four mounts 82 is defined by the contour of the bottom plate and the outline of a similar figure obtained by reducing the shape of the bottom plate inward from the outer shell by about 5 to 20%. In the area of constant width, the bottom plate can be arranged at a position where it can be supported from below. Each of the mounts 82 may be arranged at appropriate intervals at positions where the forces supporting the load of the cabin 10 are approximately balanced. Further, as the arrangement of the four mounts 82, for example, an arrangement may be adopted in which the center of gravity of the cabin 10 overlaps with the intersection of the diagonal lines of a quadrangle having the four mounts 82 as vertices in plan view. good.

It can be said that the excavating machine 1 according to the present embodiment having the above configuration has the following configuration. That is, the excavating machine 1 is a working machine having a cabin 10, which is arranged on a frame (revolving frame 7) in which the cabin is arranged, and a plurality of vibration isolating members (four mounts 82 ) and between the frame (swivel frame 7) and the cabin 10 to support at least one (mount 82a) of the plurality of vibration-isolating materials so that the vibration-isolating materials are positioned above the other vibration-isolating materials. and a plate member (intermediate plate member 91) to be arranged. More specifically, the excavator 1 is arranged on a revolving frame 7, which is a frame of a traveling vehicle body (machine body), and includes four mounts 82 for anti-vibration support of the cabin 10, a substrate 71 of the revolving frame 7, and a cabin. 10 bottom plates and supports one mount 82a of the four mounts 82 so that the mount 82a is positioned above the other mounts 82b, 82c, 82d distributed at the same horizontal height. It also has an intermediate plate member 91 for arranging it above.

According to the excavating machine 1 according to the present embodiment having the configuration as described above, the mount 82a of the four mounts 82 is arranged at a higher position than the other mounts 82b, 82c, and 82d. Therefore, a space can be provided under the mount 82a, and another member (swing cylinder 38) can be arranged in the space. That is, the utilization of the space below the cabin 10 is improved. In addition, since the space below the cabin 10 can be used more widely than before, the options for the size and type of members that can be arranged are expanded, and the degree of freedom in designing the arrangement of parts mounted on the revolving frame 7 is improved. Furthermore, in the conventional anti-vibration structure in which all of the multiple mounts exist in the space at a constant height between the bottom plate of the cabin 10 and the base plate 71 of the revolving frame 7, the mounts are located at positions that interfere with other members. In this case, if priority is given to installing other members, the mount must be removed, and there is a concern that the anti-vibration performance will deteriorate. According to the excavating machine 1 according to the present embodiment, by shifting the arrangement of at least one of the mounts 82 upward, the vibration isolation performance of the cabin 10 can be improved without reducing the number of the mounts 82 . and utilization of the space below the cabin 10 can be made compatible.

Further, in the excavating machine 1 according to the present embodiment described above, the plate member (the intermediate plate member 91) has the flat plate portion 92 and the protruding portion 93 that protrudes upward from the flat plate portion 92. ) are spaced apart from the flat plate portion 92 via the projecting portion 93 . That is, in the structure of the intermediate plate member 91, the intermediate plate member 91 is provided with a projecting portion 93 that protrudes upward. The mount 82a is arranged at a height separated from the upper surface of the flat plate portion 92. As shown in FIG.

According to the excavating machine 1 according to the present embodiment having such a configuration, the mount 82 is supported by the protruding portion 93, so that the vertical arrangement of the mount 82 can be designed more flexibly. . If the height of the projecting portion 65 of the front frame plate 63a is within an allowable range on the floor surface in front of the driver's seat of the cabin 10, it is possible to support the mount 82 at a higher position.

Further, in the excavating work machine 1 according to the present embodiment described above, the plate (intermediate plate 91) is provided with a vibration isolator (mount 82b) different from the vibration isolator (mount 82a) arranged via the projecting portion 93. It has mounting holes (anti-vibration material mounting holes 89) that can be attached. By adopting such an intermediate plate member 91, at least two mounts 82a and 82b can be easily arranged at different heights.

Further, in the excavating machine 1 according to the present embodiment described above, the plate member (intermediate plate member 91) has a stepped portion 94 between the projecting portion 93 of the flat plate portion 92 and the mounting hole (vibration-isolating material mounting hole 89). . That is, when the mount 82a and the mount 82b are arranged at different heights, the arrangement height can also be adjusted by the stepped portion 94 provided on the intermediate plate member 91. FIG.

Further, in the excavating machine 1 according to the present embodiment described above, in the front anti-vibration structure 98 that supports the front portion of the cabin 10, the intermediate plate member 91 is constructed above the support members 81a and 81b, and the mounts 82a and 82a are provided. The intermediate plate member 91 is interposed between the mount 82a and the support 81a, so that the mount 82a is supported by the intermediate plate member 91. By adopting such an intermediate plate member 91, a part of the plurality of mounts 82 can be mounted without changing the shape of the conventionally adopted support, as compared with the case where the mount 82 is supported only by the support 81. It is possible to change the vertical arrangement of the mounts.

Further, in the excavating machine 1 according to the present embodiment described above, the bottom plate (bottom frame 61, front frame plate 63a) of the cabin 10 has the overhanging portion 65 projecting upwardly, and the projecting portion 93 is overhanging. It is arranged below the portion 65 .

It can be said that the excavating machine 1 has the following configuration. That is, in the anti-vibration structure (front anti-vibration structure 98, rear anti-vibration structure 99) that supports the cabin 10 arranged on the revolving frame 7 that is rotatably provided above the lower traveling body 2A, it is fixed to the revolving frame 7. and a plurality of vibration isolators (four mounts 82) supported by the plurality of supports, at least one of the plurality of vibration isolators (four mounts 82) ( The mount 82a) is arranged in a space within a projecting portion 65 where a portion of the bottom plate (front frame plate 63a) of the cabin 10 projects upward.

In this way, since the bottom plate of the cabin 10 is provided with the projecting portion 65 and the mount 82 is accommodated therein, it is only necessary to increase the height of only a portion of the upper surface of the floor on which the driver's seat is provided. The height of the floor as a whole can be kept low. This makes it possible to suppress an increase in the installation height of the cabin 10 .

In addition, in the excavating machine 1 according to the present embodiment described above, the vibration isolator (the mount 82) is provided in the cylindrical container portion 83 for containing the viscous fluid, and outwardly protrudes from the open end of the container portion 83. It is a liquid-filled mount having a flange portion 86 and an elastic body 84 covering the opening of the container portion 83 . Therefore, it can be easily attached to the support 81 and the intermediate plate member 91 via the flange portion 86 .

Modifications of the front vibration isolation structure 98 for the cabin according to the present embodiment will now be further described with reference to FIGS. 12 to 15 . It should be noted that the same members as those in the front anti-vibration structure 98 shown in FIGS. 8 to 11 are denoted by the same reference numerals, and detailed description thereof will be omitted.

In the configuration of the modified example shown in FIG. 12, a support 181a having the same height as the left front support 81b supports a flat intermediate plate member 191 with no step in the vertical direction. A projecting portion 193 provided on the right end side of the intermediate plate member 191 is configured to be higher than the projecting portion 93 by the amount that the support 181a is lower than the support 81a.

Thus, in the front vibration isolation structure 98, the length of the leg portion 197 of the projection portion 193 is longer than that of the leg portion 97 of the projection portion 93, so that the height positions of the mounts 82a and 82b with respect to the substrate 71 are adjusted. can be adjusted. That is, the front frame plate 63a can be supported parallel to the substrate 71 by the mounts 82a and 82b. As described above, in the front anti-vibration structure 98, even when the support members 181a and 82b of the same height support the left and right sides of the intermediate plate member 191 that is not provided with a stepped portion, the height of the leg portion 197 of the projecting portion 193 and the front frame It is possible to horizontally support the bottom plate of the cabin 10 with a plurality of mounts 82 by adjusting the projecting portion 65 and the projecting height of the plate 63a.

In addition, in the modification shown in FIG. 12, the mount 82b is mounted at a position lower than the mount 82a by providing the right end of the intermediate plate 191 with a vibration isolator mounting hole, but in the configuration of the modification shown in FIG. A projecting portion 193 is further provided on the upper portion of the intermediate plate member 192 in place of the vibration isolator mounting hole. In this way, in the front support structure of the cabin 10, when the mounts 82b and the mounts 82a are arranged above the intermediate plate member 192, the shape of the front frame plate 63a connected to the mounts 82a and 82b is also adjusted accordingly. change. As shown in FIG. 13, the front frame plate 63a may have a shape in which a tunnel-shaped projecting portion 165 extending in the lateral direction of the cabin 10 is formed. In this case, the floor surface in front of the driver's seat is provided with a step across the left and right by the overhanging portion 165 . Further, as another shape of the front frame plate 63a, a shape in which projecting portions 65 of the same shape are provided at positions corresponding to the arrangement of the projecting portions 193 may be used.

In the configuration of the modification shown in FIG. 14, a support 81e is additionally provided between the supports 81a and 81b. The support 81e has the same shape as the support 81a, but may have another shape as long as it has the same height as the support 81a and does not interfere with the swing cylinder . An intermediate plate member 291 having a shorter horizontal length than the above-described intermediate plate member 91 is supported by the support members 81a and 81e. Therefore, a support portion 292 having vibration-isolating material mounting holes is provided on the upper portion of the support 81b, and the mount 82b is supported at the same height as the mounts 82c, 82d supported by the supports 81c, 81d. When such an intermediate plate member 291 is employed, the support 81e is added, and the support 81b is changed into a shape capable of supporting the mount 82. As shown in FIG.

In the configuration of the modified example shown in FIG. 15, in order to reduce the height of the projecting portion 365 in the front frame plate 63a, the projecting portion 393 having a leg portion 397 lower in height than the projecting portion 93 and the projecting portion 293 An intermediate plate member 391 provided with a hole through which the container portion 83 of the mount 82 can be inserted is adopted in the flat plate portion 92 directly below the mount 82a so that a part of the container portion 83 is below the flat plate portion 92. are doing. If a space for arranging other members can be secured below the mount 82a, the entire mount 82a does not have to be above the intermediate plate member 391, and the overhanging portion 365 is located on the floor surface in front of the driver's seat of the cabin 10. A lower height is also possible. In other words, at least a part of the mount 82a should be arranged so as to protrude upward from the bottom plate of the cabin 10 .

The above description of the embodiment is an example of the present invention, and the working machine according to the present invention is not limited to the above-described embodiment. Therefore, it goes without saying that various modifications other than the above-described embodiments are possible according to the design and the like, as long as they do not deviate from the technical idea of the present invention. In addition, the effects described in the present disclosure are only examples and are not limited, and other effects may also occur.

In one embodiment of the present invention described above, the heights of the supports 81a and 81b are different. On the other hand, as shown in the modified example, the heights of the supports 81a and 81b that support the intermediate plate member 91 may be the same. That is, the shape of the intermediate plate members 91, 191, 192, 291 and the structure for supporting them are such that the bottom plate of the cabin 10 can be horizontally supported by a plurality of mounts. It is determined in consideration of the height of the projecting portion 65 of the plate 63a.

Further, in one embodiment of the present invention, the intermediate plate member 91 is supported by the supports 81a and 81b having different heights, and a stepped portion 94 is provided in the middle of the flat plate portion of the intermediate plate member 91 to support the different heights. Although the support height of the mount by the bodies 81a and 81b is adjusted, it is not limited to this. The height of the supports 81a and 81b that support the intermediate plate member 91 is determined from the flange portion 86 of the mount 82 to the upper end of the elastic member 84 so that the front frame plate 63a is parallel to the base plate 71 of the swivel frame 7. It can be determined by considering the height, the height of the projecting portion 93 of the intermediate plate member 91, and the height of the projecting portion 65 of the front frame plate 63a. For example, in the front anti-vibration structure 98, the left and right intermediate plate members 191 and 192 are supported by support members of the same height, and the height of the projecting portion 93 and the projecting portion 65 of the front frame plate 63a are equal to each other. The front frame plate 63a may be made parallel to the substrate 71 by adjusting the height.

In the embodiment of the present invention described above, the intermediate plate member 91 is interposed between the support 81a and the projection 93 that supports the mount 82a. 93 may be directly supported by a support. Furthermore, in the above-described embodiment, the projecting portion 93 that supports the mount 82a and the supporting body 81a are separate members, but the projecting portion 93 and the supporting body 81a can be combined without interposing the intermediate plate member 91. A support having height may support the mount 82a. Furthermore, other members such as spacers may be added to adjust the height position for supporting each mount 82 . In addition, the mount 82 may be placed directly on the upper surface of the intermediate plate 91 without using the projecting portion 93 .

Further, in the embodiment of the present invention described above, the four mounts 82 support the bottom plate of the cabin 10 at four points, but the present invention is not limited to this. Three mounts 82 may be used for three-point support, and additional mounts may be added to provide a total of five points, two in front and three in rear, or six points in total, two in front, two in middle, and two in rear. You may make it swing support.

In the above-described embodiment of the present invention, in order to secure the arrangement space for the swing cylinder 38, the support height of the mount 82a arranged on the right front side of the cabin 10 in the front anti-vibration structure 98 of the cabin 10 is changed to three other heights. Although an example in which it is higher than the mounts 82b, 82c, and 83d has been described, it is not limited to this. The support height of any one of the mounts 82b, 82c, and 83d is determined in consideration of the size, shape, maintenance workability, etc. of the members to be arranged in the space between the bottom plate of the cabin 10 and the base plate 71 of the revolving frame 7. You may change the support structure of the cabin 10 so that .

In one embodiment of the present invention described above, the liquid-filled mount is used as the anti-vibration material, but the present invention is not limited to this. For example, a rubber mount consisting of a predetermined thickness of rubber and a metal frame may be used.

1 Excavator (work machine)
2A lower traveling body 2B upper rotating body 3 excavator 4 earth removing device 5 traveling section 6 body frame 7 swing frame 9 counterweight 10 cabin 38 swing cylinder 60 bottom plate 61 bottom frame 63a front frame plate 65 overhang 80 cabin installation portion 81 support Body 82 Mount (anti-vibration material)
83 Container Part 84 Elastic Body 86 Flange Part 89 Anti-vibration Material Mounting Hole 91 Intermediate Plate Material 92 Flat Plate Part 93 Protruding Part 94 Stepped Part 98 Front Anti-vibration Structure 99 Rear Anti-vibration Structure

Claims (6)

A working machine comprising a cabin,
a plurality of anti-vibration materials arranged in a frame on which the cabin is arranged and supporting the cabin in anti-vibration;
a plate member disposed between the frame and the cabin, supporting at least one of the plurality of vibration-isolating members and arranging the vibration-isolating member above other vibration-isolating members;
A working machine comprising: The plate member has a flat plate portion and a protruding portion that protrudes upward from the flat plate portion,
The vibration-damping material is spaced apart from the flat plate portion via the projecting portion,
A work machine according to claim 1, characterized in that: 3. The working machine according to claim 2, wherein the plate member has a mounting hole to which a vibration isolator other than the vibration isolator disposed via the projecting portion can be attached. 4. The working machine according to claim 3, wherein the plate member has a stepped portion between the projecting portion and the mounting hole in the flat plate portion. The bottom plate of the cabin has an overhanging portion projecting upward,
The projecting portion is arranged below the overhanging portion,
The working machine according to any one of claims 2 to 4, characterized in that: The anti-vibration material is
a cylindrical container part containing a viscous fluid;
a flange projecting outward from the open end of the container; an elastic body covering the opening of the container;
A working machine according to any one of claims 1 to 5, characterized by:

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