JP2004291695A - Cabin of wheel loader - Google Patents

Abstract

A cabin of a wheel loader that can be formed without welding a frame having a front support, a rear support, and an upper beam.
A pair of right and left frame members, each having a deformed pipe bent and formed in a side view gate shape, are arranged in a pair, and an upper beam portion that connects a front support portion, a rear support portion, and an upper end of the front and rear support portion is integrally formed. The cabin 2 can be formed without welding the frame 4, and the strength can be improved by reducing the stress concentration at the welding location. Further, the air conditioner 9, the air conditioner filter 11, and the rotating lamp 12 can be arranged at optimal positions.
[Selection diagram] Fig. 1

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a cabin of a wheel loader.
[0002]
[Prior art]
In this type of conventional technology, the hood covering the control unit is formed by connecting the upper ends of a pair of left and right front struts, intermediate struts, and rear struts with upper beams to form left and right frames, and attaching a roof member to the left and right upper beams. Attachment, a windshield is mounted between the left and right front supports, a door is mounted on the middle support, and a hatchback door is mounted between the left and right rear supports (for example, see Patent Documents 1 and 2).
[0003]
[Patent Document 1]
Japanese Patent Publication No. Hei 8-2760 [Patent Document 2]
JP-A-7-3842.
[0004]
[Problems to be solved by the invention]
In the prior art, the front support, the rear support, the upper beam, and the like use square pipes and are joined by welding. However, a welding process is required, and stress concentration is likely to occur at a welding location. .
An object of the present invention is to provide a cabin of a wheel loader that can solve such a problem of the related art.
An object of the present invention is to provide a cabin of a wheel loader that can be formed without welding a frame by integrally forming a front strut, a rear strut, and an upper beam with a deformed pipe.
[0005]
[Means for Solving the Problems]
The specific means for solving the problems in the present invention are as follows.
First, the frame 4 constituting the left and right side frames of the cabin 2 is formed by bending a deformed pipe into a portal shape in a side view and connecting an upper end of a front support 5, a rear support 6, and an upper end of a front and rear support. Are integrally formed.
As a result, the front strut portion 5, the rear strut portion 6, and the upper beam portion 7 can be integrally formed with the frame 4 in which one deformed pipe is bent into a gate shape in a side view without welding, thereby reducing stress concentration. As a result, the strength can be improved and the cost can be reduced.
[0006]
Secondly, a roof member 8 is attached between the left and right upper beams 7 of the pair of left and right side view portal frame members 4, and an air conditioner 9 is arranged below the roof member 8.
Thereby, the structure of the roof member 8 can be simplified, and the air conditioner 9 can be mounted.
Third, an outside air inlet member 10 is provided at the rear of the roof member 8 so as to protrude rearward, and a filter 11 communicating with the air conditioner 9 is disposed inside the outside air inlet member 10.
Thus, the production of the outside air inlet member 10 can be simplified, and the arrangement structure of the filter 11 can be simplified.
[0007]
Fourth, a mounting base 12A is provided on the left and right sides of the outside air inlet member 10 at the rear of the roof member 8, and the rotating lamps 12 are arranged. The upper surface of the mounting base 12A is substantially the same as the uppermost surface of the roof member 8. Or it is arranged low.
As a result, the rotation lamp 12 can be easily mounted, and the height above the cabin top can be reduced.
Fifth, the deformed pipe forming the frame 4 has two recesses b between two outer peripheral arc surfaces a, and a mounting portion or a contact portion of the cabin surface forming member is formed in the recess b. That is.
[0008]
Thereby, the mounting portion for mounting the cabin surface forming member such as the window glass and the contact portion for the cabin surface forming member such as the door to abut can be configured very simply.
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 to 6, reference numeral 1 denotes a wheel loader which connects a front body 28 having a front loader 26 and a front wheel 27 and a rear body 30 having an engine, a cabin 2 and a rear wheel 29 by a vertical axis 31. By operating a steering device 32 having a pair of hydraulic cylinders, the front vehicle body 28 swings relative to the rear vehicle body 30 to be steered.
[0010]
The rear body 30 of the wheel loader 1 has a built-in engine and a transmission for driving the rear wheel 29 therein. A hood 15 is provided so as to cover the engine and the like. 17 are mounted.
A steering wheel 31 for operating the steering device 32 is disposed in front of the driver's seat 17, and a speed change operation device, a loader operation device for operating the front loader 26, and the like are disposed around the driver's seat 17. The unit 16 is constituted.
[0011]
The cabin 2 is mounted on the rear vehicle body 30 by assembling or separately and retrofitted so as to surround the control section 16.
The cabin 2 includes a pair of left and right frames 4 forming a left and right side frame, and integrally forms a front support 5, a rear support 6 and an upper beam 7, and the front support of the frame 4 is formed. An intermediate support 34 is provided between the rear support 5 and the rear support 6, and a roof member 8 is provided between the left and right upper beams 7 to form an overall framework. A windshield 35 is fitted between the left and right front supports 5. The entry / exit door 20 is mounted on the left and right intermediate columns 34.
[0012]
The frame body 4 is formed by bending a straight deformed pipe at two places to form a side view portal having two arc-shaped corner portions, and front and rear portions become a front support portion 5 and a rear support portion 6, The intermediate portion becomes the upper beam portion 7 connecting the upper ends of the front and rear support portions, and these are integrally formed.
As shown in FIG. 3, the deformed pipe is drawn or extruded into a shape in which a circular pipe is immersed in two opposing inward directions so as to have two depressions b between two outer circular arc surfaces a. Etc.
[0013]
The two depressions b are oriented in the left-right direction and the front-rear direction, and the left-right depressions b of the left and right front support columns 5 form a mounting portion for a windshield 35 as a cabin surface forming member. The recessed portion b in the rear direction of the support portion 5 forms a contact portion of the entrance door 20 as a cabin surface forming member.
Further, the left and right dent portions b of the left and right rear support portions 6 form contact portions such as a rear upper door (hatchback door) 14 and a rear lower door 18 as a cabin surface forming member to be described later. The rearward recessed portion 5 of FIG. 5 forms a mounting portion of the blown glass 21 as a cabin surface forming member described later and a contact portion of the opening / closing lid 23, respectively.
[0014]
Further, the downward recessed portion b of the upper beam portion 7 forms a contact portion between the entrance door 20 and the opening / closing lid 23, and the leftward recessed portion b forms a mounting portion of the roof member 8.
An air conditioner 9 is disposed below the roof member 8. The air conditioner 9 is supported by the left and right frames 4 and / or the roof member 8, and the lower portion thereof is covered with an interior material 44. The air conditioner 9 includes an air conditioner unit, a blower, a filter 11, and the like. Note that a heater or a cooler may be used instead of the air conditioner 9.
At the rear of the roof member 8, an outside air inlet member 10 made of sheet metal is provided so as to protrude rearward, and a filter 11 that communicates with an air conditioner unit of the air conditioner 9 is disposed therein.
[0015]
An outside air inlet 10a is formed on a lower surface (or a back surface) of the outside air inlet member 10 protruding rearward from the roof member 8, and the outside air taken in from the outside air inlet 10a is filtered by a filter 11, and the duct or the roof member is provided. The air enters the air conditioner unit of the air conditioner 9 through the space between the interior material 8 and the interior material, and the temperature and humidity are adjusted, and the air is blown into the cabin 2 from the plurality of outlets.
At the rear of the roof member 8, rotating lamps 12 are arranged on the left and right sides of the outside air inlet member 10. The rotating lamp 12 is mounted on a mounting base 12A, and the upper surface of the mounting base 12A is located at substantially the same height as the top surface of the roof member 8 (it may be slightly higher or lower, but preferably lower), and the cabin 2 is configured so that the height of the ground at the top can be set low.
[0016]
The back surface of the cabin 2 is divided into upper and lower parts, and a hatchback type rear upper door 14 is provided on the upper side, and a hatchback type rear lower door 18 which can be freely opened rearward around the upper part on the lower side is provided. Is provided.
The rear upper door 14 is formed of glass or transparent plastic, and has an upper end pivotally connected to the rear portion of the roof member 8 via a pivotal support 38 so that opening and closing can be assisted via a gas damper or the like. You can stop at. Although not shown, a lock member for locking the rear upper door 14 in a closed state is provided between the rear upper door 14 and the left and right rear columns 6.
[0017]
The rear lower door 18 is made of sheet metal, glass, or plastic, and may be transparent or opaque. Is supported on the rear support 6 directly or via a support member so as to be swingable about a horizontal axis. The opening / closing pivot 19 of the rear lower door 18 may be not only swingable with respect to the rear support 6 but also detachable.
Further, between the rear lower door 18 and the left and right rear support portions 6, a lock device 39 for locking the rear lower door 18 in a closed state, a support rod (fastener) 40 for holding the rear lower door 18 in an open state, and the like are provided.
[0018]
The lower portion of the rear lower door 18 has a concave portion 18a for fitting on the rear portion since the rear portion of the bonnet 15 projects rearward from the rear lower door 18.
The bonnet 15 is openable and closable so that the rear end thereof rises via the lower horizontal axis, and swings around the horizontal axis to open the engine room while the driver's seat 17 is mounted. The rear end of the swinging hood 15 draws an opening / closing locus P. The locus of the lower end of the rear upper door 14 is indicated by S, and the locus of the lower end of the lower rear door 18 is indicated by R.
The opening / closing pivot 19 of the rear lower door 18 is set behind the open / close locus P of the rear end of the bonnet 15, and if the rear lower door 18 is swung rearward to be in an open state, the bonnet 15 is moved. The door can be opened and closed, and in this case, the rear upper door 14 may or may not be opened.
[0019]
A fixed cover 36 surrounds the periphery of the engine, and the bonnet 15 contacts the upper surface of the fixed cover 36 when closed. Reference numeral 37 denotes a counterweight at the rear end of the rear vehicle body 30.
The side surface of the cabin 2 is divided back and forth by an intermediate column 34, and the door 20 is provided on the front side of the intermediate column 34, whereas the rear side of the intermediate column 34 is further divided vertically. A rear glass 21 is provided on the lower rear side, and a ventilation port 22 is formed on the rear upper side of the side surface. The ventilation port 22 is configured to be opened and closed by an opening / closing lid 23.
[0020]
The opening / closing lid 23 has a front portion pivotally supported by the intermediate support 34, and a rear portion provided with an opening / closing connector 42 for connecting the rear support 6 to the rear support 6 freely. Can be ventilated from above and behind.
In the present invention, it is best that the shape of each member and the positional relationship between front and rear, left and right, and up and down in the above embodiment are configured as shown in FIGS. However, the present invention is not limited to the above-described embodiment, and members and configurations can be variously modified and combinations can be changed.
[0021]
For example, the rear surface of the cabin 2 may be located behind the rear end of the hood 15, and the rear lower door 18 may cover the rear end of the hood 15. It may be formed to be the same or longer than the vertical length.
The roof member 8 is formed of sheet metal, and the rear portion is extended to the rear corner portion of the frame body 4 and supports the rear upper door 14, but the portion connected to the upper beam portion 7 and the rear corner portion are formed. The portion formed and provided with the outside air inlet member 10 may be formed as a separate member.
The rotating lamp 12 may be provided so as to protrude rearward from the rear surface of the cabin 2, and the rotating lamp 12 may not be protruded upward from the uppermost portion of the cabin 2.
[0022]
The rear upper door 14, the rear lower door 18, the getting on / off door 20, the glazing glass 21, the windshield 35 and the like may be a door frame or a window frame in which glass is fitted.
[0023]
【The invention's effect】
According to the present invention described in detail above, the front strut portion 5, the rear strut portion 6, and the upper beam portion 7 are integrally formed with the frame 4 in which one deformed pipe is bent in a side view portal shape without welding. Thus, stress concentration can be reduced, strength can be improved, and cost can be reduced.
[Brief description of the drawings]
FIG. 1 is a side view showing an embodiment of the present invention.
FIG. 2 is a sectional side view of the same.
FIG. 3 is a sectional plan view of the same.
FIG. 4 is a side view of the entire wheel loader.
FIG. 5 is a rear view of the entire wheel loader.
FIG. 6 is a plan view of the entire wheel loader.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Wheel loader 2 Cabin 4 Frame 5 Front support part 6 Rear support part 7 Upper beam part 8 Roof member 9 Air conditioner 10 Outside air inlet member 11 Filter 12 Rotation lamp 15 Bonnet 16 Control part 17 Driver's seat 18 Rear lower door 19 Opening / closing Pivot point 20 getting on / off door 21 fixed glass 22 ventilation opening 23 opening / closing lid

Claims (5)

A frame body (4) constituting left and right side frames of the cabin (2) is formed by bending a deformed pipe into a portal shape in a side view to connect a front support (5), a rear support (6) and an upper end of the front and rear support. A cabin of a wheel loader, wherein an upper beam (7) is integrally formed. A roof member (8) is attached between the left and right upper beams (7) of the pair of left and right side view gate frames (4), and an air conditioner (9) is arranged below the roof member (8). The cabin of the wheel loader according to claim 1, wherein the cabin is provided. The outside air inlet member (10) is provided in the rear part of the roof member (8) so as to protrude rearward, and a filter (11) communicating with the air conditioner (9) is arranged inside the outside air inlet member (10). 3. The cabin of the wheel loader according to 1 or 2. Attachments (12A) are provided on the left and right sides of the outside air inlet member (10) at the rear of the roof member (8), and the rotating lamps (12) are arranged. The cabin of a wheel loader according to any one of claims 1 to 3, wherein the cabin is arranged substantially the same as or lower than the uppermost surface of (8). The deformed pipe forming the frame (4) has two concave portions (b) between two outer peripheral arc surfaces (a), and the mounting portion or the abutment of the cabin surface forming member is in the concave portions (b). The cabin of a wheel loader according to any one of claims 1 to 4, wherein a cabin is formed.

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