JP4230199B2 - Cab floor structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a floor structure of a driver's cab provided on a construction machine main body in a construction machine such as a hydraulic excavator or a work machine such as an industrial vehicle or an agricultural machine.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, in a hydraulic excavator whose main drive source is an engine type, for example, a space in a gantry (deck portion) that supports a cab is used as a space for storing tools. Further, in the same excavator type construction machine in which the drive source is a combination of an engine and an electric motor (so-called hybrid construction machine), a plurality of (26 pieces) spaces in the same frame (DC12V / piece) What is used as a space for storing the battery is also known (see, for example, Patent Document 1).
[0003]
[Patent Document 1]
Japanese Patent Laid-Open No. 2001-11889
[Problems to be solved by the invention]
However, in general, hoses and harnesses related to control equipment and the like are fixed to the lower surface of the floor panel constituting the floor portion of the cab in a stripped state by clips or the like. There is a problem that there is a risk of damage. In addition, the hose, harnesses, and the traveling control equipment attached to the floor panel with the lower part protruding from the lower surface of the floor panel are obstacles to securing a wide utility space in the gantry. There is also the problem of becoming. Therefore, it must be said that it is very difficult to secure a space for storing as many as 26 batteries in the gantry as described in Patent Document 1, particularly in a small and medium model. Note that Patent Document 1 does not specify specific means for securing such a utility space in the gantry.
[0005]
The present invention has been made in view of such problems and circumstances, and can protect hoses and harnesses that are extended between the cab and the work machine main body, and can be used for utility in the gantry. An object of the present invention is to provide a cab floor structure that can secure a wider space.
[0006]
[Means for solving the problems and actions / effects]
In order to achieve the above object, the cab floor structure according to the present invention comprises:
The floor structure of the operator's cab provided on the platform of the work machine main body, provided with a tunnel portion at the center position in the left-right direction of the floor panel constituting the floor portion of the operator's cab , and at the front center position of the floor panel. An upward inclined surface portion is formed toward the front, a traveling control device for controlling the operation of the traveling device of the work machine is attached to the inclined surface portion, and the work machine of the work machine is operated at the rear portion of the floor panel. It arranged working machine manipulator, the tunnel portion, does not project a harness which extends between the traveling manipulator and electromagnetic switching valve to be operated in the running manipulator on the lower surface of the floor panel with inserted as in the tunnel portion, wherein the harness is extended between the work machine steering device and electromagnetic switching valve to be operated for the work machine manipulator Furoapa It is characterized in that inserted so as not to protrude the lower surface side Le.
[0007]
According to the present invention, the tunnel portion is provided at the center position in the left-right direction of the floor panel constituting the floor portion of the cab, and a harness extending between the cab and the work machine main body is provided in the tunnel portion. since is inserted, will be the harness is protected by the tunnel section, for example, also the space within the gantry as was utilized as storage space tooling, never harness damaged by out of tooling. Further, since the rigidity of the floor panel is enhanced by the wall portion constituting the tunnel portion, the cost can be reduced by reducing the plate thickness. In addition, since the harness extending through the center of the floor panel to the electromagnetic switching valve is protected, maintenance due to disconnection or failure of the harness can be concentrated.
[0008]
Further, according to the present invention, since the harness is housed in the tunnel portion so as not to protrude to the lower surface side of the floor panel, it is possible to secure a wide utility space in the gantry below the floor panel. Further, the forward to the front center position of the floor panel is formed the inclined surface portion of the upward gradient, since the inclined surface portion is a preparative Chakumen of run line manipulator, running from the lower surface floor panel The amount of protrusion of the control device can be reduced, and a wider utility space can be secured.
[0009]
In the present invention, the tunnel portion is preferably arranged on the upper surface side of the floor panel so that the lower surface of the floor panel becomes a flat surface or a substantially flat surface . By so doing, it is possible to secure a wider utility space in the gantry below the floor panel.
[0010]
In addition, when this invention is applied to the engine type work machine which uses an engine as a main drive source, tools etc. are accommodated in the utility space obtained by this invention. In this case, there is an advantage that a large amount of tools can be accommodated compared to the conventional case, and convenience is improved. In addition, when the present invention is applied to an electric work machine having an electric motor as a main drive source instead of an engine or a so-called hybrid work machine having a combination of an engine and an electric motor as a drive source, the present invention can be obtained. In the utility space, electrical components such as power storage devices (batteries, capacitors (capacitors), etc.) and inverters are stored. In this case, there are advantages that the degree of freedom in layout design can be improved, the operation time can be extended, and the maintenance inspection can be facilitated.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Next, a specific embodiment of the cab floor structure according to the present invention will be described with reference to the drawings. The present embodiment is an example in which the present invention is applied to a hydraulic excavator that is a kind of construction machine.
[0012]
FIG. 1 is an external perspective view of a hydraulic excavator according to an embodiment of the present invention.
[0013]
A hydraulic excavator 1 according to the present embodiment includes a track-type lower traveling body 2 and an upper revolving body 3 attached to the lower traveling body 2 via a swiveling device (not shown). In the following description, the front, rear, left, and right directions are determined based on the operator's driving posture.
[0014]
The lower traveling body 2 includes a track frame and a traveling device mounted on the track frame, and the traveling device is wound around and mounted between a driven wheel and a driving wheel on both sides of the track frame. The crawler belt is configured to make a circular motion by the operation of each traveling hydraulic motor that applies power to each drive wheel, and the hydraulic excavator 1 travels in the front-rear and left-right directions by this circular motion.
[0015]
In the upper swing body (corresponding to the “work machine main body” of the present invention) 3, a work machine 4 is located at the front center, a cab 5 is located at the left front, and a driving engine is located at the rear In addition, a hydraulic unit, a counterweight, and other devices are provided. Here, the working machine 4 includes a boom, an arm, and a bucket that are rotated by expansion and contraction operations of a boom cylinder, an arm cylinder, and a bucket cylinder, respectively, and the hydraulic unit includes a hydraulic oil tank and an engine. A set of operation valves for supplying and discharging hydraulic oil to be driven and hydraulic oil discharged from the hydraulic pump to each hydraulic actuator (boom cylinder, arm cylinder, bucket cylinder, travel hydraulic motor, swing motor driving hydraulic motor) The main valve is a body, and an electromagnetic switching valve for operating the switching operation of each operation valve.
[0016]
Next, the floor structure of the cab 5 of the excavator 1 will be described in detail below. FIG. 2 is a longitudinal sectional view of a main part showing the floor structure of the cab. 3 is an overall perspective view of the floor panel, and FIG. 4 is a sectional view taken along the line ZZ of FIG.
[0017]
The driver's cab 5 has a plurality of (this embodiment) on a gantry (hereinafter referred to as “deck portion”) 6 having a box structure as shown in FIG. 2 formed on a revolving frame constituting the framework of the upper revolving structure 3. The plate-like structure as shown in FIG. 3 is supported through four support bodies (viscous mounts) 7 and forms the floor portion of the operator cab 5 by being supported by these support bodies 7. The floor panel 8 and a cab 9 having a known structure fixed to the upper surface of the floor panel 8 are configured. Here, the floor panel 8 is manufactured by welding, plastic working, or a manufacturing method combining both.
[0018]
In the floor panel 8, a tunnel portion 10 extending in the front-rear direction at a center position in the left-right direction has an insertion hole formed on the back side of the cab 9 with an inner space of a traveling control equipment mounting portion 15, which will be described later, and the outside of the cab 5 It is provided so as to communicate via (not shown). As shown in FIGS. 3 and 4, the tunnel portion 10 includes an upper wall portion 13 projecting upward with respect to the flat portion 12 of the floor panel 8 so as to form a required space 11 inside. The lower wall portion 14 is provided so as to close the opening below the upper wall portion 13. The lower wall portion 14 is formed by fixing both side portions of the flat plate member to the lower surface of the flat portion 12 by bolt fastening.
[0019]
A travel control device mounting portion 15 for mounting a travel control device 20 that controls the operation of the travel device is formed at the front portion of the floor panel 8. The traveling control device mounting portion 15 is formed to be bent in a mountain shape when viewed from the side so that an inclined surface portion 15a having an upward slope is arranged on the front side, and the traveling surface is attached to the inclined surface portion 15a. A mounting hole 15b into which the lower part of the control device 20 is fitted is formed. Then, by fixing the attachment surface portion of the travel control device 20 to the inclined surface portion 15a by bolt fastening, the travel control device 20 is installed in a tilted and lifted state, and the travel control device 20 is installed from the lower surface of the floor panel 8. It does not protrude.
[0020]
Here, the travel control device 20 is configured to output an electric signal corresponding to the tilt displacement by tilting operation of either the travel lever 21 or the travel bed 22 that operates the travel control device 20. The harness 31 inserted into the space 11 in the tunnel portion 10 is electrically connected to the electromagnetic switching valve related to the operation of the traveling device via the controller 23 installed at the right rear position in the cab 5. Has been. In this way, the traveling operation of the excavator 1 by the traveling device is performed by the tilting operation of the traveling lever 21 or the traveling bed 22. In addition, what is shown by the code | symbol 24 is the cover of the traveling control apparatus 20. FIG.
[0021]
An operation seat 26 is installed above the rear portion of the floor panel 8 via a seat mounting base 25, and work implement control devices 27 are installed on the operation seat 26 on the left and right sides at positions where the operator can operate in the seated state. (Only the right side is shown in FIG. 2). These work implement control devices 27 are configured to output an electrical signal corresponding to the tilt displacement of the operation lever 28 erected so as to be tiltable to the work implement control device 27, and the space in the tunnel unit 10. 11 is electrically connected to the electromagnetic switching valve related to the operation of the work machine 4 and the turning device via the controller 23 by the harness 32 inserted through the wire 11. Thus, the bending operation of the working machine 4 by the hydraulic cylinders and the turning operation of the upper swing body 3 by the turning device are performed by the predetermined tilting operation of the operation levers 28.
[0022]
In addition, although detailed description by illustration is abbreviate | omitted, the harness regarding steering equipment other than the above-mentioned steering equipment 20 and 27, instruments, and switches is also distribute | arranged in the said tunnel part 10. FIG. In addition, a floor mat whose bottom surface has a shape that matches the uneven shape of the top surface of the floor panel 8 and whose top surface is substantially flat is laid on the floor panel 8.
[0023]
According to the floor structure of the cab 5 as described above, the cab 5 is installed on the traveling control device 20 and the work implement control device 27 installed in the cab 5 and the upper swing body 3 outside the cab 5. The harnesses 31 and 32 and other harnesses that are extended between the operation switches 20 and 27 and the electromagnetic switching valve are operated on the lower surface of the floor panel 8 by the tunnel portion 10 provided on the floor panel 8. Since it is inserted into the space 11 formed at the upper position, these harnesses do not protrude from the lower surface side of the floor panel 8. Therefore, it is possible to secure a wider utility space 30 in the deck portion 6 below the floor panel 8. For example, when storing tools in the utility space 30, a larger amount of tools can be stored than in the conventional case. There is an advantage that convenience is enhanced. Moreover, they harness because they are protected by the tunnel portion 10 can prevent damage due to out of tooling. Further, since the rigidity of the floor panel 8 is enhanced by the upper wall portion 13 constituting the tunnel portion 10, there is an advantage that the cost can be reduced by reducing the plate thickness or the like.
[0024]
Instead of the floor panel 8, each floor panel 8A, 8B, 8C having a tunnel structure as shown in FIGS. 5A, 5B, and 5C may be used. The floor panel 8A shown in FIG. 5 (a) has the same basic configuration as the floor panel 8 (therefore, the functionally identical parts are given the same reference numerals in the figure. Hereinafter, the floor panel 8B). , 8C is also the same)), the bottom surface is completely flattened. In the floor panel 8A, stepped portions 34 and 34 into which both side portions of the lower wall portion 14A are fitted are formed on the flat surface portion 12A by a processing means such as milling, and are not shown in the drawing. Thus, the lower wall portion 14A is fixed to the flat surface portion 12A. Further, in the floor panel 8B shown in FIG. 5B, the upper wall portion 13 is arranged such that the lower wall portion 14 in the floor panel 8 is deleted and the harnesses 31 and 32 are arranged in the space 11. It is supported by clips 35 and 35 fixed to the required portions. Further, in the floor panel 8C shown in FIG. 6C, the lower wall portion 14 in the floor panel 8 is deleted and the grommet-like is fixed to a required portion of the upper wall portion 13 in the same manner as the floor panel 8B. The harnesses 31 and 32 are supported by the cord support bracket 36 to which the members 37 and 37 are attached so that the harnesses 31 and 32 are arranged in the space 11. Here, in the floor panel 8B and the floor panel 8C, if the harnesses 31, 32 can be stretched in the space 11, the clips 35, 35 and the cord support bracket 36 are not provided. A tunnel part of the structure is also conceivable.
[0027]
In the present embodiment , an example is shown in which tools are stored in a utility space 30 to which the present invention is applied to a construction machine that uses an engine as a main drive source. However, the application target of the present invention is a main drive for an electric motor. In the case of a so-called hybrid construction machine having a configuration in which an engine and an electric motor are combined as a power source, or an engine and a motor as a drive source, for example, a power storage device [battery, capacitor (capacitor), etc.], an inverter, etc. By adopting a configuration that accommodates the electrical components, it is possible to improve the degree of freedom in layout design, extend the operation time, and facilitate maintenance and inspection.
[0028]
Further, in the present embodiment, the traveling manipulator 20 and the working machine steering apparatus 27 has an example is of electric type, but they manipulators 20, 27 are pilot pressure control method using the pressure reducing valve Needless to say, the present invention can be applied. In this case, a pilot pressure oil transport hose is inserted into the tunnel portion 10 ( 10A , 10B , 10C ) instead of the previous harnesses 31, 32.
[0029]
Further, as shown in FIG. 6 , a drawer 41 is detachably attached to the utility space 30 by a telescopic guide rail 42, and a tool, a power storage device [battery, capacitor (capacitor (capacitor)) is attached to the drawer 41. ) Etc.], electrical components such as inverters may be accommodated. In this way, convenience can be further enhanced.
[0030]
Further, Oite to the present embodiment has been described by way of which forms the operation space of the sealed by the cab 9 as the cab 5 is not limited to this, also driving for example those forming operations space open by canopy Included in the concept of a room.
[Brief description of the drawings]
FIG. 1 is an external perspective view of a hydraulic excavator according to an embodiment of the present invention.
FIG. 2 is a longitudinal sectional view of a main part showing a floor structure of a cab.
FIG. 3 is an overall perspective view of the floor panel.
4 is a cross-sectional view taken along the line ZZ in FIG. 2. FIG.
FIG. 5 is a cross-sectional view of a main part of each floor panel including a tunnel portion according to another embodiment.
Figure 6 is a diagram showing an example in which a lead to the deck.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Hydraulic excavator 2 Lower traveling body 3 Upper turning body 5 Driver's cab 6 Mount (deck part)
8 floor panel 10,10A, 10B, 10 C tunnel portion
11 space 20 traveling control equipment 31, 32 harness

Claims (2)

The floor structure of the operator's cab provided on the platform of the work machine main body, provided with a tunnel portion at the center position in the left-right direction of the floor panel constituting the floor portion of the operator's cab , and at the front center position of the floor panel. An upward inclined surface portion is formed toward the front, a traveling control device for controlling the operation of the traveling device of the work machine is attached to the inclined surface portion, and the work machine of the work machine is operated at the rear portion of the floor panel. It arranged working machine manipulator, the tunnel portion, does not project a harness which extends between the traveling manipulator and electromagnetic switching valve to be operated in the running manipulator on the lower surface of the floor panel with inserted as in the tunnel portion, wherein the harness is extended between the work machine steering device and electromagnetic switching valve to be operated for the work machine manipulator Furoapa Floor structure of the cab, characterized in that inserted so as not to protrude the lower surface side Le.   2. The cab floor structure according to claim 1, wherein the tunnel portion is disposed on an upper surface side of the floor panel so that a lower surface of the floor panel becomes a flat surface or a substantially flat surface.

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