JP3673683B2 - Swivel work machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a turning work machine such as a backhoe.
[0002]
[Prior art]
For example, in a turning work machine disclosed in Japanese Patent Application Laid-Open No. 11-1939, an engine is arranged at the rear part of the turning table, a radiator is arranged on the right side of the engine, and a driver's seat is arranged on the front side. An oil tank, a fuel tank, and a battery are disposed in the tank.
The fuel tank, the battery, the oil tank, and the like are covered with a side bonnet that can be opened and closed around a horizontal axis, and the engine and the radiator are arranged adjacent to the rear side of the side bonnet, and Is supported by a bonnet after it is pivotally supported around the horizontal axis and can be freely opened and closed.
[0003]
[Problems to be solved by the invention]
The side bonnet and the rear bonnet are molded by a steel plate or a resin material. Particularly, since the side bonnet is formed long in the front and rear direction, a dimensional error in the front and rear direction is likely to occur. ing.
When the side bonnet is attached to the swivel so that it can be opened and closed with the front as a fulcrum, the position of the rear side of the side bonnet is uniquely determined by the mounting position on the front side. When this occurs, the gap at the abutting portion with the rear bonnet becomes wide and narrow, and the side bonnet is poorly fit and the appearance is deteriorated and the sealing property is deteriorated. Further, by repeatedly opening and closing the side bonnet after long-term use, the gap between the rear bonnet and the rear bonnet is likely to fluctuate due to backlash, distortion, and the like.
[0004]
The present invention aims to solve the above problems.
[0005]
[Means for Solving the Problems]
The present invention takes the following technical means to achieve the above object.
That is, the swivel working machine according to the present invention has a first bonnet that is provided on a swivel base so that it can be opened and closed with one end in the longitudinal direction as a fulcrum, and is adjacent to the other end of the first bonnet in the longitudinal direction. The first bonnet is provided such that the position in the longitudinal direction with respect to the second bonnet is adjustable.
[0006]
In this case, by adjusting the longitudinal position of the first bonnet, the gap with the second bonnet can be set to a predetermined value, so that the first bonnet can be better fitted and the appearance can be prevented from deteriorating.
The second bonnet may be provided so as to be openable and closable with respect to the swivel base, or may be fixed.
According to the present invention, a reinforcing frame that reinforces the first bonnet is fixed to the inner surface of the first bonnet, and an opening / closing fulcrum portion of the first bonnet and an attachment of the first bonnet to the swivel are attached to the reinforcing frame. It is characterized in that a fixture having an adjustment portion that can adjust the position in the longitudinal direction is provided. According to this, since the first bonnet is reinforced by the reinforcing frame, and the fixture is provided on the reinforcing frame, it is possible to prevent distortion and the like when the first bonnet is opened and closed, and to increase the strength of the rotation support structure. This can be improved, and fluctuations in the gap with the second bonnet are also prevented.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 8 shows a turning work machine 1 according to the present invention exemplified by a backhoe. The turning work machine 1 is mainly composed of a crawler traveling device 2, a turntable 3, and an excavation device 4.
On the track frame 6 of the crawler traveling device 2, a swivel base 3 is mounted via a swivel bearing 7 so as to be pivotable about a swivel axis X in the vertical direction. Is mounted so that it can be raised and lowered.
[0008]
The excavator 4 is provided at the front end of the base frame 3a constituting the bottom surface of the swivel base 3 via a bracket 3b, and the counterweight 9 is provided at the rear end to balance the weight with the excavator 4. It has been. A control floor 13 having a driver's seat 10, a control device 11, and a step unit 12 is provided on the left front side of the swivel base 3. Various engines such as an engine 15 and a tank 16 are provided on the rear and right sides of the control floor 13. Bonnets 21, 22, and 23 that cover the equipment are mounted. Further, an entrance 18 to the driver's seat 10 is formed on the left side of the turntable 3 in front of the driver's seat 10.
[0009]
The excavator 4 pivotally supports the base ends of the boom 26 and the boom cylinder 27 on the swing bracket 25 supported by the bracket 3b via the vertical axis, and pivots the arm 28 on the tip of the boom 26. The arm cylinder 29 is swingable, and a bucket 30 is pivotally supported at the tip of the arm 28 so that the bucket cylinder 31 can scoop and dump.
The rear part of the swivel base 3 is formed on an arc wall surface centered on the swivel axis X, and the swivel trajectory drawn by the rear part of the swivel base 3 is stored in the left and right and front and rear widths of the crawler traveling device 2. . The left and right side portions of the swivel base 3 are formed on a straight wall surface in the front-rear direction, and the left-right width of the swivel base 3 is formed narrower than the diameter of the swivel locus.
[0010]
Thus, the turning work machine 1 according to the present embodiment belongs to the rear small turning type in which the turntable 3 can turn without protruding from the vehicle width of the traveling device 2, thereby enabling traveling and excavation work in a narrow road. It can be easily done.
An engine 15 is disposed laterally at the rear portion of the base frame 3a. A hydraulic pump 33 is directly connected to the left side of the engine 15, and a radiator 34, a battery 35, and the like are disposed on the right side of the engine 15. A hydraulic oil tank 16 is disposed on the front side of the radiator 34, a control valve 36 is disposed on the front side of the hydraulic oil tank 16, and a fuel is disposed on the left front side of the swivel base 3 below the driver seat 10. A tank 37 is provided.
[0011]
The bonnets 21, 22, and 23 are made of sheet metal or hard resin, and are swung with a side bonnet (first bonnet) 21 that is formed long in the front-rear direction on the right side of the swivel base 3 (to the right of the control floor 13). Arranged on the left side of the side bonnet 21 between the rear bonnet 22 and the driver's seat 10 on the rear side of the pedestal 3 and adjacent to the rear side of the side bonnet 21. Fixed bonnet 23.
The side bonnet 21 covers the upper, front and left and right sides of the hydraulic oil tank 16, the control valve 36, the battery 35, the radiator 34, etc., and the rear bonnet 22 covers the upper and rear sides of the engine 15 and the hydraulic pump 33. The covering and fixing bonnet 23 is configured to cover the upper side and the left side of the engine 15 and the hydraulic pump 33 and the like.
[0012]
Further, the side bonnet 21 has a rear opening shape, the rear bonnet 22 has a front opening shape, and the rear side edge of the side bonnet 21 is adjacent to the right front side edge of the rear bonnet 22 in a butting manner. ing.
The fixed bonnet 23 is supported from below by a support frame 39 erected on the base frame 3 so as to straddle the engine 15 and the hydraulic pump 33 as shown in FIGS. And fixed.
The support frame 39 includes an upper frame 39a provided in the left-right direction above the engine 10 and the like, and leg portions 39b extending from the left and right ends and the middle of the upper frame 39a to the front lower side or the rear lower side. It exhibits a side-view portal type, and these are formed of a plate material or a pipe material.
[0013]
The rear bonnet 22 has a front upper portion attached to the upper frame 39a via a hinge member 40 so as to be pivotable and openable around the axis P2 in the left and right direction, and upward (in the direction of arrow A in FIG. 1). ) To open the engine room from the rear. In addition, a locking tool 41 that locks the closed state with the counterweight 9 is provided at the lower rear portion of the rear bonnet 22.
The side bonnet 21 is provided such that the front lower portion thereof is pivotable around the axis P1 in the left-right direction with respect to the swivel base 3 and can be opened and closed, and the hydraulic oil tank 16 is opened by opening in the front upper direction (arrow B direction). The outside of the control valve 34 and the like can be opened. A handle 44 for opening and closing is attached and fixed to the upper wall of the side bonnet 21.
[0014]
A reinforcing frame 46 is provided on the inner surface of the side bonnet 21, and the reinforcing frame 46 is connected to the inner side of the front wall of the side bonnet 21 by a fastener 47 (see FIG. 3) such as a bolt. A rear connecting plate 46b connected to the rear inner side of the upper wall by a fastener 48 such as a bolt (see FIGS. 5 and 6), and a pair of left and right reinforcing members 46c for connecting the front and rear connecting plates 46a and 46b to each other; It is constituted by.
The reinforcing member 46c is formed by a rod-like member such as a pipe member so as to extend back and forth along the upper wall and the front wall inner surface of the side bonnet 21, and therefore supports the side bonnet 21 from the inner surface side and serves as a reinforcement. The hydraulic oil tank 16 and the control valve 36 are covered and have a function as a guard.
[0015]
In the illustrated example, the left and right reinforcing members 46c are two, but may be one or three or more. Further, the reinforcing member 46c may be made of a solid bar material or a plate material.
The front connection plate 46 a is provided with a fixture (attachment means) 51 for attaching the side bonnet 21 to the swivel base 3.
As shown in FIGS. 3 and 4, the fixture 51 includes a pair of left and right projecting pieces 52 projecting downward from the front connecting plate 46 a and a left and right support shaft (opening / closing fulcrum portion) at the lower end of the projecting piece 52. A pair of left and right arms 54 that are rotatably connected via 53 and a connecting plate 55 made of a planar rectangular plate material that is long in the left-right direction and connects the lower ends of the arms 54 to each other.
[0016]
The connecting plate 55 is connected to the auxiliary step portion 12a on the swivel 3 formed on the front side of the side bonnet 21 by a fastener 56 such as a bolt or a nut.
Accordingly, the side bonnet 21 is fixed to the reinforcing frame 46 that is pivotally attached to the swivel 3 around the support shaft 53 (around the axis P1). 46 is also opened at the same time, so that the distortion of the side bonnet 21 at the time of opening and closing can be effectively prevented, and the reinforcing frame 46 does not get in the way when inspecting the internal equipment.
[0017]
Moreover, since the fixture 51 is provided not on the first bonnet but on the reinforcing frame 46, the strength of the rotation support structure of the first bonnet can be improved.
The auxiliary step portion 12a communicates with the steering step portion 12 and enables the boarding / alighting from the front right side of the swivel base 3. When the side bonnet 21 is opened, the auxiliary step is provided on the front wall. By depositing on the part 12a side, the open state can be supported.
The connecting structure between the mounting tool 51 and the swivel base 3 will be described in detail. On the back side of the auxiliary step 12a, a base plate 58 that is long in the left-right direction is provided so as to protrude downward. A pair of engaging tools 59 having an L-shape are provided protruding downward.
[0018]
The base plate 58 is formed with a pair of left and right bolt holes 60, and the connecting plate 55 is formed with a pair of left and right adjusting holes 61 corresponding to the bolt holes 60. The connecting plate is inserted into the pair of engaging tools 59 so as to be detachable in the front-rear direction, and the bolt holes 60 and the adjusting holes 61 are matched to insert the bolts of the fasteners 56 and fastened with nuts. 55 is attached to the auxiliary step portion 12a. The auxiliary step portion 12a is formed with an opening 62 penetrating vertically so as to allow bolt insertion and fastening from above.
[0019]
The fixture 51 has an adjustment portion 64 that can adjust the attachment position in the front-rear direction with respect to the swivel base 3, and the adjustment portion 64 in the present embodiment forms the adjustment hole 61 in a long hole in the front-rear direction. It is configured by
Therefore, the front / rear mounting position of the connecting plate 55, that is, the front / rear mounting position of the side bonnet 21 can be adjusted within the range of the long hole 61. By this adjustment, the gap t (see FIG. 1) can be set to a predetermined value, and even if a dimensional error or the like in the longitudinal direction occurs in the side bonnet 21, the side bonnet 21 can be placed in a well-contained manner, and deterioration in appearance and sealing property can be prevented. It is like that.
[0020]
In addition, even if the side bonnet 21 is repeatedly opened and closed over a long period of use, the side bonnet 21 is reinforced by the reinforcing frame 46, so that fluctuation of the gap with the rear bonnet due to distortion or the like can be prevented. Even if there is a change in the gap, the adjustment section 64 can adjust the front and rear positions of the side bonnet 21 again to set the predetermined gap t again.
Further, by unfastening the fastener 56 and detaching the connecting plate 55 from the engagement tool 59, or by removing the support shaft 53 from the projecting piece 52 and the arm 54, the entire side bonnet 21 is moved to the swivel 3. Is removable.
[0021]
The adjusting portion 64 can also be configured by making the bolt hole 60 a long hole in the front-rear direction. In this case, the fastener 56 also moves back and forth by adjusting the front-rear position of the connecting plate 55. Since 56 may be displaced from the opening 62 and it may be difficult to insert and fasten the bolt, it is preferable to provide the adjustment portion 64 on the fixture 51 side.
Locking means 66 for locking the closed state of the side bonnet 21 is provided inside the rear side of the side bonnet 21.
[0022]
As shown in FIGS. 5 and 6, the locking means 66 includes a hook-shaped latch 67 provided so as to protrude rearward from the rear connection plate 46 b of the reinforcing frame 46, and a right side portion of the support frame 39. And a locking member 69 attached via a bracket 68 projecting to the hook, and the closing state of the side bonnet 21 can be locked by detachably engaging the locking member 69 with the latch 67. I have to.
The stopper metal 69 is a so-called shrimp metal having a ring part 69a that engages with the latch 67 and a rotation lever 69b that engages and disengages the ring part 69a.
[0023]
Since the locking means 66 is provided in the rear interior of the side bonnet 21, it is exposed rearward when the rear bonnet 22 is opened, and can be engaged and disengaged from within the engine room. In other words, since the side bonnet 21 cannot be opened unless the rear bonnet 22 is opened, the locking device 41 may be provided only in the rear bonnet 22.
Also, by opening both the side bonnet and the rear bonnets 21 and 22, various devices on the swivel base 3 can be exposed in series (entirely), and inspection work and the like can be performed easily. Yes.
[0024]
The present invention is not limited to the above-described embodiment, and can be appropriately changed in design.
For example, the arrangement of the side bonnet 21, the fixed bonnet 23, and the control floor 13 on the swivel 3 may be reversed in the left-right direction. By extending the fixed bonnet 23 rightward and adjoining the side bonnet 21 forward and backward. The fixed bonnet 23 can be configured as a second bonnet. The rear bonnet may be configured to be opened and closed with the rear lower part as a fulcrum.
As the turning work machine, a standard type in which the turning locus drawn by the rear end of the turntable 3 protrudes from the width of the traveling device 2 or the turning locus is accommodated within the width of the traveling device 2 and the excavating device 4 is moved up and down. An ultra-small turning type provided with a moving fulcrum on the side of the driver's seat 10 or the like may be used, and a cabin that surrounds the control floor 13 may be provided on the turntable 3.
[0025]
【The invention's effect】
According to the present invention described above, the gap between the first bonnet and the second bonnet can be set to a predetermined value by adjusting the position of the first bonnet in the longitudinal direction, and the first bonnet can be improved to prevent the appearance from deteriorating. it can.
[Brief description of the drawings]
FIG. 1 is a right side view showing a swivel base of a swivel working machine according to the present invention.
FIG. 2 is a plan view showing the arrangement of bonnets and the arrangement of support frames and reinforcing frames.
FIG. 3 is an enlarged side view showing a side bonnet attachment.
FIG. 4 is an enlarged plan view of the same.
FIG. 5 is an enlarged side view showing a locking means of the side bonnet.
FIG. 6 is a rear view of the same.
FIG. 7 is a plan view of the turning work machine.
FIG. 8 is an overall side view of the same.
[Explanation of symbols]
1 Backhoe (Swivel work machine)
3 Turntable 21 side bonnet (first bonnet)
22 Rear bonnet (second bonnet)
51 Fixing tool 64 Adjusting part

Claims (2)

A first bonnet provided on the swivel base so as to be openable and closable around one end in the longitudinal direction as a fulcrum, and a second bonnet disposed adjacent to the other end of the first bonnet in the longitudinal direction is provided. The first bonnet is provided with adjustable longitudinal position with respect to the second bonnet,
A reinforcing frame for reinforcing the first bonnet is fixed to the inner surface of the first bonnet, and an opening / closing fulcrum portion of the first bonnet and a mounting position of the first bonnet with respect to the swivel are adjusted in the longitudinal direction on the reinforcing frame. A fixture having an adjustment portion to enable,
The fixture includes an arm having the opening / closing fulcrum portion and rotatably supporting the first bonnet, and a connecting plate having the adjustment portion and connected to a lower end portion of the arm,
The swivel base is provided with a base plate that protrudes downward from the upper surface of the connecting plate, and the lower surface of the base plate has the upper surface of the connecting plate in contact with the base plate. swivel work machine, characterized in that the connecting plate pair of left and right engaging member which both ends are adjustably supported in the longitudinal direction of the is provided to protrude downward.   The base plate is disposed on the back surface of the auxiliary step on the swivel base, and the auxiliary step allows insertion and fastening of a fastener to be fastened to the base plate from above. The turning work machine according to claim 1, wherein an opening penetrating vertically is formed.

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