JP3787284B2 - Working machine side cover opening and closing structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a side cover opening / closing structure that opens and closes an opening provided on a side of a work machine.
[0002]
[Prior art]
A hydraulic excavator of a construction machine, for example, a construction machine is composed of an upper swing body 2, a lower traveling body 1 and a work device 8 as shown in FIGS. 5 and 6.
The upper swing body 2 is provided with a cab 3 for an operator room of a work machine. Further, on the frame of the upper swing body 2, an engine, a hydraulic pump, a cooling device, a battery, a control valve, a fuel tank, a hydraulic oil A storage portion 2a for storing a tank or the like is provided.
[0003]
An appropriate opening 11 for inspection and maintenance and storage is provided on the outer surface in the vehicle width direction of the upper swing body 2 constituting the storage portion 2a of the upper swing body 2 in order to open and close the opening 11. Side cover 10 is provided.
The side cover 10 is provided with a side cover handle 5 for a handle, and is attached to the opening 11 so as to be opened and closed in a double-speech manner through a hinge member 6 hinged to the opening 11.
[0004]
The upper swing body 2 is provided with a counterweight 7 and a work attachment 8 attached to the front portion of the upper swing body 2.
FIG. 6 is a plan view of the main part showing a state in which the side cover 10 is opened as shown in FIG. 5. The vehicle width dimension W of the excavator, the turning center O of the upper swing body 2, and the upper swing body 2 are shown. The maximum turning radius R of the work attachment 8 is excluded.
[0005]
In general, hydraulic excavators, which are working machines for construction machinery, are often used in confined areas because there are obstacles such as standing objects, walls, and trees around the tunnel and in residential areas. In the hydraulic excavator, as shown in FIGS. 5 and 6, the cab 3 and the counterweight 7 are arranged in a circle having a turning radius R so as to cope with the narrow work described above, and outward from the vehicle width dimension W. It does not protrude.
[0006]
[Problems to be solved by the invention]
However, in the conventional side cover opening / closing structure, as shown in FIGS. 5 and 6, the side cover 10 is hinged to the opening 11 by the hinge member 6. In some cases, the opening trajectory of the side cover 10 protrudes greatly outside the circle with the maximum turning radius R, not to mention a general or large hydraulic excavator, but particularly a small turning type hydraulic excavator. The advantage of the excavator is impaired, and the side cover 10 cannot be opened when working in confined spaces, so that there is a problem that inspection maintenance and entry / exit of goods cannot be performed.
[0007]
The present invention has been devised in view of such a problem. An opening is provided on the outer peripheral side surface of the work machine, and an openable and closable side cover provided in the opening can be opened and closed along the outer peripheral side surface. An object of the present invention is to provide a side cover opening / closing structure for a working machine capable of working in a narrow space.
[0008]
[Means for Solving the Problems]
Therefore, the side cover opening and closing structure of the working machine according to the first aspect of the present invention is the working machine having the upper swing body mounted on the lower traveling body and the upper swing body having the side cover. The base ends of the front lever and the rear lever are pivotally pivoted to the position of the distance between fulcrums set by the design specifications inside the upper and lower parts of the opening, respectively, and the pivots of the front lever and the rear lever are supported. The position and length are set so that the upper side and the lower side coincide with each other in a plan view, and the front ends of the front lever and the rear lever are pivotally supported on the inner surface side of the side cover, together with the side cover when the side cover opened to open and close movement back-and-forth direction along the outer surface of the upper revolving body, the opening of the side cover provided on the upper rotating body is mounted an outer surface of the maximum turning radius It is characterized in that the Rikurumahaba direction is provided in the notch plate portion.
[0009]
According to a second aspect of the present invention, there is provided a side cover opening / closing structure of the working machine according to the first aspect, wherein the lengths of the front lever and the rear lever are substantially the same length, The length is configured to be shorter than the length of the rear lever.
The side cover opening / closing structure of the working machine of the present invention according to claim 3 is the configuration according to claim 1 or 2, wherein the side cover opening / closing structure is larger than a radius from a rotation center of the upper swing body to an outer peripheral side surface of the upper swing body . as can plurality of rotational path intersecting the pivoting locus of the upper rotating body, rotatably above a position of the distance between support points is set by the design specifications proximal end of the of the front lever and a rear lever It is pivotally supported inside the upper and lower portions of the opening of the upper swing body, and the side cover is configured to move in the front-rear direction along the outer surface of the upper swing body when the side cover is opened. It is a feature.
[0010]
The side cover opening / closing structure of the working machine according to claim 4 of the present invention is the structure according to any one of claims 1 to 3, wherein the base end portions of the front lever and the rear lever are on the upper swing body side. The fulcrum position that is attached to the lever is provided at a position farther from the side cover provided at the opening of the upper swing body toward the center side in the vehicle width direction of the swing body as the length of the lever is longer. As the length of the lever is shorter, the lever is provided at a portion closer to the opening of the revolving body compared to the lever having a longer length.
[0011]
The side cover opening and closing structure of the working machine of the present invention according to claim 5 is the structure according to any one of claims 1, 2 , and 4 , wherein the turning trajectory of the side cover is the maximum turning of the upper swing body. It is characterized by being configured so as to be within a substantially circular radius .
[0012]
According to a sixth aspect of the present invention, there is provided a side cover opening / closing structure for a work machine according to the second or third aspect, wherein the base end of the front lever is rotatably attached to the upper swing body and the rear lever. The distance between the fulcrum between the base end of the fulcrum and the fulcrum that is rotatably attached to the upper revolving body is determined by the fulcrum of the pivot that is rotatably attached to the side cover of the front lever and the rear lever. It is characterized by being configured to be smaller than the distance between the fulcrums between the fulcrum of the pivotal support portion rotatably attached to the side cover side.
[0013]
According to a seventh aspect of the present invention, there is provided a side cover opening / closing structure for a work machine according to the second or third aspect, wherein the side cover has a maximum turning radius greater than a maximum turning radius of the side cover when closed and the upper turning body. The side cover is configured to be able to open and close along the outer surface of the upper swing body within the range of the movement trajectory.
[0014]
The side cover opening and closing structure of the working machine of the present invention according to claim 8 is the structure according to claim 2 or 3, wherein the side cover provided on the maximum turning radius line of the upper swing body and the maximum of the upper swing body The side cover can be opened and closed in the front-rear direction along the outer surface of the upper swing body within a range of the maximum turning trajectory of the side cover that is larger than the turning radius. Yes.
[0015]
According to a ninth aspect of the present invention, in the construction of the sixth aspect , the side cover opening / closing structure of the working machine according to the sixth aspect includes the front lever and the rear lever, the fulcrum of the two base end portions, and the two pivot support portions. The fulcrum and the side cover are characterized in that the lengths of the two levers have substantially the same length to form a parallelogram link.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
DESCRIPTION OF EMBODIMENTS Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In the following description, components that are substantially the same as those in the prior art will be denoted by the same reference numerals.
FIG. 1 is a schematic perspective view showing a main part of a hydraulic excavator when the side cover opening / closing structure of the working machine of the present invention is applied to the hydraulic excavator, and FIG. 2 is a schematic showing a cross section taken along line 2A-2A in FIG. FIG. 3 is a schematic enlarged plan view of the main part showing the open / closed state of the side cover in FIG. 2, and FIG. 4 is a schematic explanatory view showing an arrow along line 4A-4A in FIG.
[0017]
Next, the side cover opening and closing structure of the present invention will be described with reference to FIGS. 1 to 4. The front lever 17 and the rear lever 18 according to the present invention have the same pivot position and length on the upper side and the lower side in plan view. Therefore, the upper side will be described in this embodiment. As shown in FIG. 1, a hydraulic excavator of a construction machine, for example, a construction machine is composed of an upper swing body 2, a lower traveling body 1, and a work device 8.
[0018]
The upper swing body 2 is provided with a cab 3 for an operator room of a work machine, and on the frame of the upper swing body 2, an engine E, a hydraulic pump, a cooling device R, a battery, a control valve, a fuel tank, A storage portion 2 a having a cover 2 </ b> C that can be opened and closed in the vertical direction is provided at an upper portion where a hydraulic oil tank or the like is stored.
An appropriate opening 11 for inspection and maintenance and storage is provided on the outer surface in the vehicle width direction of the upper swing body 2 constituting the storage portion 2a of the upper swing body 2 in order to open and close the opening 11. Side cover 10 is provided.
[0019]
2 to 4, it is pivotally supported by fulcrum pins 15 and 16 provided inside the upper portion of the opening 11, and the front end portions of the upper front lever 17 and the rear lever 18 are side covers. 10 is configured to be pivotally supported by upper pivot pins 19 and 20 respectively.
Further, as shown in FIG. 3, the front lever 17 having a different length of amm and the rear lever 18 having a length of bmm are respectively provided at the upper and lower portions of the opening 11 of the upper swing body 2. The fulcrum distance between the base ends 15 and 16 is pivotally supported at a position where the distance is S1, and the pivot positions 15, 16 and lengths of the two front and rear levers 17 and 18 are flat. When viewed from the top, the upper side and the lower side are arranged so that the upper side and the lower side coincide with each other, and the front end portions of the front lever 17 and the rear lever 18 are pivoted to the inside of the side cover 10 so as to be pivotable. It is pivotally supported by.
[0020]
The pivot pins 19 and 20 are attached to the inner portion of the side cover 10 according to the shape of the outer peripheral side surface of the upper swing body 2.
In the present embodiment, the side cover 10 is configured to move forward along the outer side surface 2F of the upper swing body 2 when the side cover 10 is opened. The direction may be reversed to move backward.
[0021]
Since one embodiment of the present invention is configured as described above, when opening the closed side cover 10 as shown in FIGS. 2 and 3, the side cover handle 5 shown in FIGS. First, the side cover 10 is pulled out to the outside, and as shown in FIG. 2, the maximum turning radius R of the outer side surface 2F of the upper turning body 2 in the arc shape in plan view and the outside when the side cover 10 is closed. Since there is an interval L1 between the side surfaces, the side cover 10 can be opened while being moved forward within the approximate range of the interval L1.
[0022]
In this case, the length (a) of the front lever 17 is made larger than the length (b) of the rear lever 18, and the distance S1 between the fulcrums between the base ends 15 and 16 is set to the pivot pins 19 and 20. Since the distance is set slightly smaller than the distance S2 between the fulcrums, the side cover 10 can be opened to the front position along the arcuate outer surface of the upper swing body 2.
Further, in this embodiment, the side cover 10 opens and closes the opening 11 for attaching the side cover 10 provided on the left and right side surfaces of the upper swing body 2 in the vehicle width direction substantially inside the maximum swing radius R of the upper swing body 2. The left and right sides of the upper swing body 2 are provided at portions where the vehicle width is reduced (notched) by the length of approximately L1 shown in FIG.
[0023]
Therefore, when the side cover 10 is rotated, the portion of the side cover 10 that protrudes outside the maximum turning radius R can be reduced and opened and closed.
Further, as shown in FIG. 2, the side cover 10 is placed in the front and rear direction of the vehicle within a range L2 between the side cover 10 in the closed state and the maximum turning trajectory of the side cover 10 larger than the maximum turning radius R of the upper turning body 2. Even if it can be opened and closed in the direction, it is possible to perform narrower work than the conventional hinged opening and closing structure.
[0024]
In the above-described embodiment, the side cover 10 is provided in the vehicle width portion of the upper swing body 2 that has the opening 11 to which the side cover 10 is attached reduced by approximately L1 from the left and right outer surfaces of the upper swing body 2. However, the side cover 10 provided on the maximum turning radius line of the upper swing body 2 and the side cover 10 larger than the maximum swing radius of the upper swing body 2 are not reduced. The side cover 10 can be opened and closed along the outer surface 2F of the upper-part turning body 2 even if the side cover 10 can be opened and closed in the front-rear direction of the vehicle within the range of the maximum turning trajectory. Narrower work can be performed than the opening and closing structure.
[0025]
Further, in the above embodiment, even if the levers are configured as a parallelogram link mechanism having substantially the same length, both of the levers can achieve substantially the same operational effects as described above.
When the lengths of the two levers are substantially the same, the opening and closing can be performed stably by the configuration of the parallelogram link mechanism.
Further, by configuring the length a of the front lever to be shorter than the length b of the rear lever, the opening / closing structure can be set in accordance with the outer shape of the upper swing body.
[0026]
Therefore, the lengths a and b of the levers 17 and 18 and the pivot positions of the levers and the distances S1 and S2 between the fulcrums of the levers 17 and 18 are the shape of the outer peripheral side surface of the upper swing body 2 and the upper swing. What is necessary is just to set with the maximum turning radius etc. of the body 2, and there exists a freedom degree at the time of the design of the said opening / closing structure.
Further, the side cover opening / closing structure of the working machine according to the present invention can perform the above-described opening / closing movement more stably by using guide rails and rollers for guiding and supporting the side covers 17 and 18 together.
[0027]
【The invention's effect】
As described above in detail, according to the side cover opening / closing structure of the working machine of the present invention described in claim 1, in the working machine having the upper swing body mounted on the lower traveling body and the upper swing body having the side cover. The base levers of the front lever and the rear lever are pivotally pivoted to the position of the distance between fulcrums set according to the design specifications inside the upper and lower parts of the opening of the upper revolving body, respectively. The rear lever pivot position and length are set so that the upper side and the lower side coincide with each other in plan view, and the front and rear levers can be pivoted to the inner side of the side cover. And when the side cover is opened, the side cover moves in the front-rear direction along the outer surface of the upper swing body. Therefore, when opening the side cover, the side cover is directed outward. Withdrawal While, it is possible to open and close substantially greater than that without the maximum turning radius of the front and rear direction of the upper rotating body to a position along the outer surface of the upper frame.
Further, since the opening to which the side cover provided in the upper turning body is attached is provided in a portion cut out in the vehicle width direction from the outer surface of the maximum turning radius, the side cover is opened when the side cover is opened. When the working machine is working in a narrow space, the side cover is opened within the circle with the maximum turning radius R. Thus, maintenance of inspection and maintenance and entry / exit of articles can be easily performed without any trouble.
[0028]
That is, even when the working machine is working in a narrow space, the side cover can be opened and closed in the front-rear direction of the vehicle along the outer surface of the upper swing body, so that maintenance and articles for inspection and maintenance can be performed without any trouble. Can be easily taken in and out.
Further, the side cover opening / closing structure of the working machine according to the present invention has a small number of components and is easy to assemble, so that the production cost is low.
[0029]
In addition, the side cover opening / closing structure is advantageous in terms of maintenance because it is not adversely affected by dust and dirt.
According to the side cover opening / closing structure of the working machine of the present invention described in claim 2, in the configuration according to claim 1, the length of the front lever and the rear lever is configured to be substantially the same length, or the front Since the length of the lever is configured to be shorter than the length of the rear lever, in addition to the effect of claim 1, when the lengths of the two levers are substantially the same, a parallelogram link is formed and stable. The length of the front lever is shorter than the length of the rear lever, and the opening / closing structure can be set in accordance with the outer shape of the upper swing body, etc. There is a degree of freedom when designing the opening and closing structure.
[0030]
According to the side cover opening / closing structure of the working machine of the present invention described in claim 3, in the configuration of claim 1 or 2, than the radius from the rotation center of the upper swing body to the outer peripheral side surface of the upper swing body. large, to allow a plurality of rotary trajectories intersecting the pivoting locus of the upper rotating body, rotatably at the position of the distance between support points is set by the design specifications proximal end of the of the front lever and a rear lever The upper cover is pivotally supported inside the upper and lower openings, and the side cover is configured to move in the front-rear direction along the outer surface of the upper swing body when the side cover is opened. Therefore, in addition to the effects of the first and second aspects, the rotation trajectories of both levers may be determined in accordance with the rotation trajectory of the side cover, and the design becomes easy.
[0031]
According to the side cover opening and closing structure of the working machine of the present invention described in claim 4, in the configuration according to any one of claims 1 to 3, the base end portion of the front lever and the rear lever is the upper portion. The fulcrum position attached to the revolving structure side is provided at a position farther from the side cover provided at the opening of the upper revolving structure toward the center side in the vehicle width direction of the revolving structure as the length of the lever increases. The shorter the length, the closer to the opening of the revolving body compared to the longer lever, the rotation of the side cover in addition to the effect of any one of claims 1 to 3. It is only necessary to determine the rotation trajectory of both levers in accordance with the trajectory, and the design is facilitated.
[0032]
According to the side cover opening and closing structure of the working machine of the present invention described in claim 5, in the configuration according to any one of claims 1, 2 , and 4 , the rotation trajectory of the side cover is that of the upper swing body. which is configured to be in a substantially circular maximum turning radius,請 Motomeko addition to the effects of any one of 1-4, when opening the side cover, open trajectory the maximum turning radius of the side cover Even when the working machine is working in a narrow space, the side cover is opened within the circle with the maximum turning radius so that maintenance work and articles can be performed without hindrance. Can be easily taken in and out.
[0034]
According to the side cover opening / closing structure of the working machine of the present invention described in claim 6, in the configuration of claim 2 or 3, the fulcrum in which the base end portion of the front lever is rotatably attached to the upper swing body side and the above The distance between the fulcrum between the base end portion of the rear lever and the fulcrum that is rotatably attached to the upper revolving body side, the fulcrum of the pivot portion that is rotatably attached to the side cover side of the front lever, and the rear lever In addition to the effects of claim 2 or 3, the side cover is attached to the upper portion of the upper portion of the side cover. The vehicle can be opened and closed by moving to a position in the front-rear direction of the vehicle along the arcuate outer surface of the revolving structure.
[0035]
According to the side cover opening / closing structure of the working machine of the present invention described in claim 7, in the configuration according to claim 2 or 3, the side cover of the side cover that is larger than the maximum turning radius of the side cover when closed and the upper swing body is provided. Since the side cover can be opened and closed along the outer surface of the upper swing body within the range of the maximum rotation trajectory, in addition to the effects of claim 2 or 3, the side cover Rotating the side cover performs a narrower work than the conventional hinged opening / closing structure, even if the side cover can be opened and closed in the front-rear direction of the vehicle with as few portions as possible protruding outside the maximum turning radius R. be able to.
[0036]
According to the side cover opening / closing structure of the working machine of the present invention described in claim 8, in the configuration according to claim 2 or 3, the side cover provided on the maximum turning radius line of the upper swing body and the upper swing body Since the side cover can be opened and closed in the front-rear direction along the outer surface of the upper revolving body within the range of the maximum turning trajectory of the side cover that is larger than the maximum turning radius, In addition to the effect of claim 2 or 3, an opening to which the side cover is attached is provided on the maximum turning radius line of the upper swing body without reducing the width of the left and right outer surfaces of the upper swing body. Even if the side cover can be opened and closed in the front-rear direction within the range of the side cover and the maximum turning trajectory of the side cover that is larger than the maximum turning radius of the upper turning body. Along the outer surface of the part turning body can be opened and closed, it is possible to perform the narrow office work than hinged closure structure of the prior art.
[0037]
According to the side cover opening / closing structure of the working machine of the present invention described in claim 9, in the structure described in claim 6 , the front lever and the rear lever, the fulcrum of the both base ends, and the pivots The parallelogram-shaped link is formed in addition to the effect of claim 7 because the parallelism-shaped link having the substantially the same length of both levers is configured from the fulcrum of the support portion and the side cover. The opening and closing movement of the vehicle in the front-rear direction can be performed stably by the link.
[Brief description of the drawings]
FIG. 1 is a schematic perspective view of a hydraulic excavator in which a side cover opening / closing structure of a working machine according to the present invention is applied to a hydraulic excavator.
FIG. 2 is a schematic explanatory diagram showing a cross section taken along line 2A-2A in FIG.
3 is a schematic enlarged main part plan view showing an open / closed state of a side cover 10 in FIG. 2. FIG.
4 is a schematic explanatory diagram showing an arrow view along line 4A-4A in FIG. 3;
FIG. 5 is a side view of a hydraulic excavator having a conventional side cover opening / closing structure.
6 is a schematic plan view showing a state in which a side cover in FIG. 5 is opened. FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Working machine boom 2 Working machine arm 2a Storage part 2C Cover 2F Outer side surface 5 Side cover handle 6 Hinge member 8 Attachment 10 Side cover 11 Opening 15, 16 Pivoting pin 17 Front lever 18 Rear lever 19, 20 Pivoting pin a Front lever length b Rear lever length O Upper turning body turning center E Engine L1 Distance between side cover when closed and maximum turning radius L2 Side cover when closed and position larger than maximum turning radius Distance S1 between the fulcrums of the pivot pins 17 and 18 S2 Distance between the fulcrums of the pivot pins 19 and 20 RO Cooling device W Vehicle width of the hydraulic excavator

Claims (9)

In the working machine having the upper revolving unit mounted on the lower traveling unit and having the side cover on the upper revolving unit,
The base ends of the front lever and the rear lever are pivotally pivoted to the position of the fulcrum distance set according to the design specifications inside the upper and lower parts of the opening of the upper swing body,
The pivot position and length of the front lever and the rear lever are set so that the upper side and the lower side coincide with each other in plan view.
Each front end of the front lever and the rear lever is pivotally supported on the inner surface side of the side cover,
When the side cover is opened, the side cover moves in the front-rear direction along the outer surface of the upper swing body ,
The side of the working machine, wherein the opening to which the side cover provided in the upper turning body is attached is provided in a portion cut out in the vehicle width direction from the outer surface of the maximum turning radius. Cover opening and closing structure. The length of the front lever and the rear lever is configured to be substantially the same length, or the length of the front lever is configured to be shorter than the length of the rear lever. Side cover opening / closing structure for the working machine described. It said larger from the center of rotation of the upper rotating body than the radius to the outer peripheral side surface of the upper rotating body, to allow rotation locus of the plurality of intersecting the pivoting locus of the upper revolving body, above the front lever and after The base end portion of the lever is pivotally supported inside the upper and lower portions of the opening of the upper revolving body so as to be rotatable at a position of a fulcrum distance set according to the design specifications.
The side cover opening and closing of the working machine according to claim 1 or 2, wherein the side cover is configured to move forward and rearward along the outer side surface of the upper swing body when the side cover is opened. Construction. Support position mounted in front lever and the base end the upper pivot side of the rear lever described above, the car of the revolving body from the side cover length provided long as the opening of the upper revolving body of the lever It is provided in a part away from the center side in the width direction, and as the length of the lever is shorter, it is provided in a part closer to the opening of the upper swing body compared to the lever having a longer length. The side cover opening / closing structure of the working machine according to any one of claims 1 to 3. 5. The work according to claim 1, wherein the side track is configured so that a turning trajectory of the side cover is within a substantially circle of a maximum turning radius of the upper turning body. Machine side cover opening and closing structure. The distance between the fulcrum between the fulcrum that the base end of the front lever is rotatably attached to the upper swing body and the fulcrum that the base end of the rear lever is rotatably attached to the upper swing body It is configured to be smaller than the distance between the fulcrums between the fulcrum of the pivot that is pivotally attached to the side cover of the lever and the fulcrum of the pivot that is pivotally attached to the side cover of the rear lever. The side cover opening / closing structure of the working machine according to claim 2, wherein the side cover opening / closing structure is provided. The side cover can be opened and closed along the outer surface of the upper swing body within a range of the side cover when closed and the maximum rotation trajectory of the side cover that is larger than the maximum swing radius of the upper swing body. The side cover opening and closing structure for a working machine according to claim 2 or 3, wherein the side cover opening and closing structure is configured as described above. The side cover is placed outside the upper swing body within a range of a side cover provided on the maximum swing radius line of the upper swing body and a maximum rotation trajectory of the side cover that is larger than the maximum swing radius of the upper swing body. 4. The side cover opening / closing structure for a working machine according to claim 2, wherein the side cover opening / closing structure is configured to be capable of opening / closing in a front-rear direction along a side surface. From the front lever and the rear lever, the fulcrum of both base ends, the fulcrum of the pivots, and the side cover, the parallel sides having the lengths of the levers are substantially the same. The side cover opening / closing structure for a working machine according to claim 6 , wherein a shape link is formed.

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