JP2008007966A - Construction machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enhance assembling workability, maintenance workability, etc. by enabling a cover surrounding mounted equipment to be easily attached to a frame. <P>SOLUTION: A head 7A of a hexagon socket head cap screw 7, which is protrusively provided at the peripheral edge of a revolving frame 5, is fitted into fitting holes 23E and 21E which are provided in the lower flanges 23D and 21D of right and left skirt covers 23 and 21, respectively. Upper flanges 23C and 21C of the skirt covers 23 and 21 are fixed to a screw seat 11B of a heat-exchanger mounting base 11, a mounting bracket 13A of a battery mounting base 13, and mounting brackets 19E and 19F of a lever stand 19 by means of a bolt 22, respectively. Thus, only the bolting of the upper flanges 23C and 21C of the respective skirt covers 23 and 21 enables the lower flanges 23D and 21D to be also fixed to the revolving frame 5, and enables the operation of attachment/detachment to be performed with ease. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a construction machine such as a hydraulic excavator, and more particularly to a construction machine provided with a cover surrounding a device mounted on a body frame.

  In general, a hydraulic excavator is known as a construction machine. The hydraulic excavator includes a lower traveling body that can be self-propelled, an upper revolving body that is rotatably mounted on the lower traveling body, and an upper revolving body. It is generally configured by a working device provided on the front side so as to be able to be lifted and lowered in the upward and downward directions.

  Further, the upper swing body includes a swing frame that forms a support structure, an engine that is mounted on the rear side of the swing frame and drives a hydraulic pump, a driver seat that is provided above the swing frame and is seated by an operator, It is generally constituted by a floor plate laid on the front side of the driver's seat, and a left cover and a right cover that stand up from the peripheral edge of the frame so as to surround the engine and the like.

  Further, an upper flange is formed at the upper position of the left and right covers by bending inward, and a lower flange is formed at the lower position by bending inward. The cover has a structure in which the lower flange is attached to the bottom plate of the revolving frame using bolts from below and the upper flange is attached to a structure such as a floor plate from above using bolts (for example, Patent Document 1). , See Patent Document 2).

Japanese Patent Laid-Open No. 6-122381 Japanese Patent Laid-Open No. 10-168942

  By the way, in the hydraulic excavator according to each of the above-mentioned patent documents, the lower flange of the cover is bolted to the bottom plate of the revolving frame from the lower side, and the upper flange is bolted to the floor plate or the like from the upper side. Therefore, since the operator must perform bolt tightening work on both the upper and lower sides of the cover, it takes time and labor to install and remove the left and right covers. There is a problem that the properties and the like are lowered.

  In particular, in the work of attaching the lower flange to the bottom plate of the swivel frame from the lower side, the work space is narrow due to the lower traveling body located near the lower side, and the screw holes must be searched by hand, so the workability is poor. There is a problem.

  The present invention has been made in view of the above-described problems of the prior art, and an object of the present invention is to easily attach a cover surrounding a mounted device to a frame, improving assembly workability, maintenance workability, and the like. It is to provide a construction machine that can be used.

  According to a first aspect of the present invention, there is provided a construction machine comprising a vehicle body frame forming a support structure, a power source mounted on the vehicle body frame, a mounted device including a control device, and a peripheral edge of the vehicle body frame to surround the mounted device. And a cover having an upper flange and a lower flange at an upper position and a lower position.

  In order to solve the above-described problem, the feature of the configuration adopted by the invention of claim 1 is that a frame-side engagement portion is provided at a position facing the lower flange of the cover at the peripheral portion of the body frame. The mounting device is provided with a screw seat for fixing the upper flange to the vehicle body frame side at a height position corresponding to the upper flange of the cover, and the cover is engaged with the lower flange on the frame side. A cover-side engaging portion that engages in a positioning state, and a bolt insertion hole at a position corresponding to the screw seat on the upper flange, and a cover-side engaging portion of the lower flange on the frame-side engaging portion. In the engaged state, the cover is fixed to the vehicle body frame side by being inserted into the bolt insertion hole and screwed into the screw seat.

  According to a second aspect of the present invention, the frame-side engaging portion is constituted by a projecting body projecting from the peripheral edge of the vehicle body frame, and the cover-side engaging portion is fitted to the projecting body. This is because it is composed of holes.

  According to the first aspect of the present invention, when the cover is attached to the vehicle body frame, the cover side engaging portion provided on the lower flange of the cover is engaged with the frame side engaging portion provided on the vehicle body frame. Thereby, the lower part of the cover can be positioned in the horizontal direction with respect to the vehicle body frame. In this state, by inserting a bolt into a bolt insertion hole provided in the upper flange of the cover and screwing this bolt into the screw seat, the cover can be fixed to the vehicle body frame only by the upper bolting operation.

  Therefore, the cover can support the lower flange on the vehicle body frame in a positioning state with only a simple engagement operation. Moreover, since the lower flange of the cover is positioned on the vehicle body frame, both the upper and lower sides of the cover can be attached to the vehicle body frame simply by bolting the upper flange of the cover from above. As a result, since it is possible to omit the bolting operation from the lower side, which requires labor, it is possible to improve assembly workability, maintenance workability, and the like.

  According to the invention of claim 2, a projecting body is provided on the peripheral edge of the vehicle body frame using, for example, a hexagon socket bolt, a pin, and the like, and a fitting hole is provided on the lower flange of the cover to fit the projecting body. Therefore, the lower flange of the cover can be supported on the body frame in a positioning state by a simple operation of fitting the fitting hole into the protruding body.

  Hereinafter, a small hydraulic excavator will be described as an example of a construction machine according to an embodiment of the present invention, and will be described in detail according to the accompanying drawings.

  First, FIG. 1 thru | or FIG. 13 has shown the 1st Embodiment of this invention. In FIG. 1, reference numeral 1 denotes a hydraulic excavator as a construction machine applied to the first embodiment. The hydraulic excavator 1 includes a self-propelled crawler type lower traveling body 2 and a lower traveling body 2. The upper revolving structure 3 is mounted so as to be capable of swiveling, and the working device 4 is provided on the front side of the upper revolving structure 3 so as to be swingable and can be raised and lowered.

  Further, as shown in FIGS. 2 to 4, the upper swing body 3 is configured to be very compact so that it can be operated even in a small site. The upper swing body 3 includes an engine 9, a hydraulic pump 10, a heat exchanger mounting base 11, a heat exchanger 12, a battery mounting base 13, a battery 14, a fuel tank 15, which are mounted devices on a swing frame 5 described later. A hydraulic oil tank 16, a lever stand 19, and the like are mounted, and these mounted devices are covered with an engine cover 17 and skirt covers 21 and 23.

  Reference numeral 5 denotes a turning frame as a vehicle body frame serving as a base of the upper turning body 3. As shown in FIG. 5, the swivel frame 5 includes a frame main body 6 that forms a support structure and a counterweight 8 provided on the rear side of the frame main body 6. The frame main body 6 and the counterweight 8 are For example, it is integrally formed by casting.

  Here, the frame body 6 includes a bottom plate 6A extending frontward, rearward, leftward, and rightward, a front rising wall portion 6B, a left rising wall portion 6C, and a right rising wall portion 6C serving as front, left, and right peripheral portions of the bottom plate 6A. A rising wall portion 6D, left and right vertical plates 6E and 6F erected on the bottom plate 6A between the left rising wall portion 6C and the right rising wall portion 6D, and front sides of the vertical plates 6E and 6F And a support bracket 6G that supports the work device 4 in a swingable manner.

  On the other hand, the frame body 6 is provided with, for example, about four stand columns 6H that are positioned on the front side and for mounting a lever stand 19 described later. Further, on the rear side of the frame body 6, for example, about four support columns 6 </ b> J for mounting an engine 9 described later are provided upright.

  Further, the left rising wall portion 6C and the right rising wall portion 6D constituting the peripheral edge portion of the frame body 6 are integrally provided with mounting seats 6K at the front position and the rear position as shown in FIGS. As shown in FIGS. 12 and 13, a screw hole 6L into which a hexagon socket head bolt 7 described later is screwed is formed at a substantially central position of each mounting seat 6K. Since this screw hole 6L is processed using a drill and a tap after casting the revolving frame 5, it can be easily formed at an accurate position.

  Reference numeral 7 denotes a hexagon socket head cap bolt listed as a representative example of the projecting body, and each of the hexagon socket head cap bolts 7 is attached to the screw holes 6L of the four attachment seats 6K. Further, each hexagon socket head bolt 7 is screwed into the screw hole 6L to project the columnar head portion 7A upward, thereby constituting a frame side engaging portion. Then, the hexagon socket head bolt 7 swivels the lower portions of the skirt covers 21 and 23 by fitting the fitting holes 21E and 23E of the skirt covers 21 and 23, which will be described later, to the head portion 7A protruding upward. It is positioned at a predetermined position on the frame 5.

  In addition, although the hexagon socket head cap screw 7 was illustrated as a representative example of a projecting body, this projecting body is not limited to the hexagon socket head bolt 7 and includes a pin, a set screw, a built-in bolt, a hexagon head bolt, and the like. .

  Here, since the hexagon socket head bolt 7 can use a commercial item, an engagement convex part can be provided in low cost. Moreover, since the hexagon socket head cap bolt 7 is a standard product, it has good accuracy such as the diameter of the head portion 7A, and can support the lower portions of the skirt covers 21 and 23 at accurate positions.

  Reference numeral 8 denotes a counterweight integrally formed at the rear portion of the frame main body 6, and the counterweight 8 balances the weight with the work device 4. In this case, the counterweight 8 is formed as a curved plate that is thicker and heavier than the bottom plate 6A, for example, and rises substantially vertically from the rear end of the bottom plate 6A.

  Reference numeral 9 denotes an engine mounted horizontally on the rear side of the turning frame 5, and the engine 9 is attached to each engine support 6 </ b> J of the frame body 6 in a vibration-proof state. A hydraulic pump 10 is attached to the right side of the engine 9 as shown in FIG. The engine 9, the hydraulic pump 10, and the like constitute a power source that supplies pressure oil for operating the hydraulic excavator 1.

  Reference numeral 11 denotes a heat exchanger mounting base which is located on the left side of the engine 9 and forms one of the mounted devices provided on the frame body 6. A heat exchanger 12 that cools engine coolant, hydraulic oil, and the like is provided on the heat exchanger mount 11. Further, as shown in FIG. 7, the heat exchanger mounting base 11 is formed, for example, by bending a plate material into an L shape, and the heat exchanger 12 is placed on a base plate 11A located on the upper side and extending in the horizontal direction. Installed.

  A cylindrical screw seat 11B is fixed to the left end of the base plate 11A of the heat exchanger mounting base 11 by means such as welding. The screw seat 11B is provided at a height position corresponding to an upper flange 21C of the left skirt cover 21 described later. And the screw seat 11B attaches the rear side part of the upper flange 21C of the left skirt cover 21, and the bolt 22 mentioned later is screwed.

  Reference numeral 13 denotes a battery mounting base (see FIGS. 8 and 9) which is one of the mounting devices provided on the right side of the engine 9. The battery mounting base 13 is attached to the rear part of a hydraulic oil tank 16 described later on the front side and attached to the revolving frame 5 on the rear side. The battery mounting base 13 is formed so as to straddle the hydraulic pump 10 by bending or welding the plate material, and the battery 14 is mounted on the upper side thereof.

  A mounting bracket 13A serving as a screw seat bent outward is provided at a front position of the battery mounting base 13 at a height position corresponding to an upper flange 23C of the right skirt cover 23 described later. The mounting bracket 13A is for mounting the rear portion of the upper flange 23C of the right skirt cover 23, and a bolt 22 described later is screwed thereon.

  15 is a fuel tank provided on the left side of the turning frame 5 and located on the front side of the engine 9, and 16 is a hydraulic oil tank located on the front side of the engine 9 and provided on the right side of the turning frame 5 (FIGS. 8 and 9). Each).

  Reference numeral 17 denotes an engine cover that covers the engine 9 and the like above the skirt covers 21 and 23, which will be described later. The engine cover 17 is attached to the counterweight 8 of the revolving frame 5 so as to be openable and closable. Further, a driver's seat 18 on which an operator is seated is mounted on the engine cover 17.

  Reference numeral 19 denotes a lever stand that is one of the mounted devices that are erected at an intermediate position on the front side of the revolving frame 5, and the lever stand 19 constitutes a control device that controls the lower traveling body 2, the work device 4, and the like. . As shown in FIGS. 3 and 4, the lever stand 19 includes a frame 19A formed using a plurality of steel plates, and left and right left and right spaces provided above the frame 19A. The work operation lever 19B, left and right travel operation levers 19C provided between the work operation levers 19B, and a decorative cover 19D that covers the frame 19A are roughly configured. The lever stand 19 is fixed to the revolving frame 5 by attaching the lower part of the frame 19 </ b> A onto each stand column 6 </ b> H of the frame body 6.

  The frame 19A of the lever stand 19 is provided with mounting brackets 19E and 19F serving as screw seats at the lower left and right positions, respectively. The mounting brackets 19E and 19F are provided on the heat exchanger mounting base 11 described above. The screw seat 11B and the mounting bracket 13A of the battery mount 13 are provided at height positions corresponding to the upper flanges 21C and 23C of the skirt covers 21 and 23, respectively. The left mounting bracket 19E attaches the front portion of the upper flange 21C of the left skirt cover 21, and the right mounting bracket 19F attaches the front portion of the upper flange 23C of the right skirt cover 23. Worn.

  Reference numeral 20 denotes a floor plate provided between the engine cover 17 and the lever stand 19. The floor plate 20 is for an operator who sits on the driver's seat 18 to put his / her feet on, and a floor mat 20A is laid on the upper side.

  Reference numeral 21 denotes a left skirt cover provided on the left side of the revolving frame 5. The left skirt cover 21 covers the mounted equipment such as the fuel tank 15 and the heat exchanger mounting base 11 from the front side and the left side between the frame body 6 and the floor plate 20 of the revolving frame 5. 6 and 10, the left skirt cover 21 includes a front surface portion 21A rising from the left side portion of the front rising wall portion 6B of the frame body 6 and a side surface rising from the left rising wall portion 6C. The portion 21B is formed as an L-shaped exterior cover. Further, an upper flange 21C is formed at the upper position of the left skirt cover 21, and a lower flange 21D is formed at the lower position by bending inward.

  On the other hand, the lower flange 21D of the left skirt cover 21 has two fitting holes serving as cover-side engaging portions corresponding to the two hexagon socket head bolts 7 provided on the left rising wall portion 6C of the frame body 6. 21E is formed. As shown in FIGS. 12 and 13, the two fitting holes 21 </ b> E are fitted from the upper side to the heads 7 </ b> A of the two hexagon socket head bolts 7 provided on the left rising wall portion 6 </ b> C of the frame body 6. Is.

  Here, the size of each fitting hole 21E is set to such an extent that it can be smoothly fitted to the head portion 7A of the hexagon socket head cap bolt 7 from above, and in the fitted state, no rattling occurs in the horizontal direction. ing. Thereby, each fitting hole 21E can be supported in a state where the lower portion of the left skirt cover 21 is positioned in the horizontal direction by fitting to the head portion 7A of the hexagon socket head cap screw 7.

  Further, the upper flange 21C of the left skirt cover 21 is provided with two bolt insertion holes 21F. The bolt insertion hole 21F positioned on the front side corresponds to the left mounting bracket 19E of the lever stand 19 and the bolt insertion hole positioned on the rear side when the left skirt cover 21 is disposed at a predetermined position with respect to the turning frame 5. 21F is arrange | positioned corresponding to the screw seat 11B of the heat exchanger mounting base 11. FIG. The bolts 22 are inserted into the respective bolt insertion holes 21F.

  Reference numeral 23 denotes a right skirt cover provided on the right side of the revolving frame 5. The right skirt cover 23 covers the mounting equipment such as the hydraulic oil tank 16 and the hydraulic pump 10 from the front side and the right side between the frame body 6 and the floor plate 20 of the revolving frame 5. The right skirt cover 23 is substantially the same as the left skirt cover 21 described above, and as shown in FIGS. 8 and 11, a front surface portion 23A rising from the right side portion of the front rising wall portion 6B of the frame body 6, An L-shaped cover is formed by the side surface portion 23B rising from the right rising wall portion 6D. Further, an upper flange 23C and a lower flange 23D are formed at an upper position and a lower position of the right skirt cover 23, respectively.

  On the other hand, in the lower flange 23D of the right skirt cover 23, two fitting holes serving as cover side engaging portions corresponding to the two hexagon socket head bolts 7 provided on the right rising wall portion 6D of the frame body 6 are provided. 23E is formed. The two fitting holes 23E are fitted to the head portion 7A of the hexagon socket head bolt 7 from the upper side in substantially the same manner as the fitting hole 21E of the left skirt cover 21, so that the lower portion of the right skirt cover 23 is fitted. Is supported in a state of being positioned in the horizontal direction.

  Further, the upper flange 23C of the right skirt cover 23 is provided with two bolt insertion holes 23F through which the bolts 22 are inserted. The bolt insertion hole 23F located on the front side corresponds to the right mounting bracket 19F of the lever stand 19, and the bolt insertion hole 23F located on the rear side is arranged corresponding to the mounting bracket 13A of the battery mounting base 13.

  The hydraulic excavator 1 according to the first embodiment has the above-described configuration. Next, the assembly work of the upper swing body 3 will be described.

  First, the engine 9, the hydraulic pump 10, the heat exchanger mounting base 11, the heat exchanger 12, the battery mounting base 13, the battery 14, the fuel tank 15, the hydraulic oil tank 16, and the lever stand 19 that are the mounted devices on the revolving frame 5. Etc. are assembled sequentially.

  Next, the left and right skirt covers 21 and 23 are attached to both the left and right sides of the revolving frame 5. In this case, as shown in FIGS. 12 and 13, two hexagonal holes provided in the left rising wall portion 6C of the frame body 6 are provided with two fitting holes 21E formed in the lower flange 21D of the left skirt cover 21. It fits into the head 7A of the attached bolt 7 from above.

  Further, when the fitting holes 21E of the left skirt cover 21 are fitted to the heads 7A of the hexagon socket head bolts 7 on the frame body 6 side, the bolt insertion holes 21F provided in the upper flange 21C of the left skirt cover 21 are The screw seat 11B of the heat exchanger mount 11 and the left mounting bracket 19E of the lever stand 19 are aligned, and in this state, the bolts 22 inserted from above into the bolt insertion holes 21F are applied to the screw seat 11B and the left mounting bracket 19E. Screw it on.

  Thereby, the lower part of the left skirt cover 21 can be positioned in the horizontal direction only by fitting each fitting hole 21E of the lower flange 21D and the head 7A of the hexagon socket head bolt 7 of the frame body 6. it can. Each bolt 22 for fixing the upper part of the left skirt cover 21 is screwed from the upper side of the upper flange 21C having no obstacle, so that the lower part is positioned together with the upper part of the left skirt cover 21. Can be fixed.

  On the other hand, the right skirt cover 23 is symmetrical with the left skirt cover 21 on the left and right, and the mounting procedure is substantially the same as that of the left skirt cover 21, so that the description of the mounting operation is omitted. To do.

  Next, the operation of the excavator 1 assembled as described above will be described. First, the operator can travel the lower traveling body 2 by sitting on the driver's seat 18 and operating each traveling operation lever 19C of the lever stand 19. Further, by operating each work operation lever 19B, the work device 4 can be operated to perform soil excavation work or the like.

  Thus, according to the first embodiment, the rising wall portions 6B, 6C, 6D of the frame body 6 serving as the peripheral portion of the turning frame 5 face the lower flanges 21D, 23D of the skirt covers 21, 23, respectively. The head portion 7A of the hexagon socket head cap bolt 7 is provided as a frame side engaging portion. Further, on the revolving frame 5 side, the screw seat 11B of the heat exchanger mounting base 11, the mounting bracket 13A of the battery mounting base 13, and the lever are located at heights corresponding to the upper flanges 21C and 23C of the skirt covers 21 and 23, respectively. Mounting brackets 19E and 19F of the stand 19 are provided. The left and right skirt covers 21, 23 are provided with fitting holes 21E, 23E for fitting to the heads 7A of the respective hexagon socket head bolts 7 in the lower flanges 21D, 23D, and the upper flanges 21C, 23C. Bolt insertion holes 21F, 23F are provided at positions corresponding to the screw seat 11B and the mounting brackets 13A, 19E, 19F.

  Therefore, when the left and right skirt covers 21 and 23 are attached to the revolving frame 5, the fitting holes 21E and 23E provided in the lower flanges 21D and 23D of the skirt covers 21 and 23 are provided in the frame body 6. In addition, each hexagon socket head bolt 7 is fitted (engaged) with the head 7A. Thereby, the lower part of each skirt cover 21, 23 can be supported in a positioning state in the horizontal direction with respect to the revolving frame 5.

  Here, generally, when positioning the lower part of the skirt cover on the revolving frame, the lower flange is fixed to the revolving frame using bolts. However, in the case of the small excavator 1 as in the present embodiment, the upper swing body 3 is formed compactly, so that it is difficult to reach the lower part of each skirt cover 21, 23, and the tool is The space for handling cannot be secured.

  However, in the first embodiment, as described above, the skirt covers 21 and 23 are fitted so that the fitting holes 21E and 23E are dropped into the heads 7A of the hexagon socket head bolts 7 on the revolving frame 5 side. It is possible to position in the horizontal direction only by doing. As a result, the skirt covers 21 and 23 are simply attached to the screw seat 11B and the mounting brackets 13A, 19E and 19F using the bolts 22 with the upper flanges 21C and 23C. Both 23C and the lower flanges 21D and 23D can be fixed to the turning frame 5.

  As a result, when the left and right skirt covers 21 and 23 are attached to and removed from the revolving frame 5, the bolting work from the lower side, which requires labor, is omitted, and only the bolting work from the upper side is performed. Therefore, assembly workability, maintenance workability, etc. can be improved.

  The frame body 6 of the revolving frame 5 is provided with a head 7A of a hexagon socket head bolt 7 as a projecting body that forms a frame side engaging portion. In this case, the screw hole 6L of the frame body 6 for screwing the hexagon socket head bolt 7 can be easily formed at an accurate position using a drill and a tap. Can be improved. Moreover, the skirt covers 21 and 23 can be accurately positioned at predetermined positions by accurately arranging the hexagon socket head bolts 7.

  Next, FIG. 14 and FIG. 15 show a second embodiment of the present invention. A feature of the present embodiment is that a pin fitting hole is provided as a frame side engaging portion on the revolving frame side, and a pin member to be inserted into the pin fitting hole is provided on the skirt cover side. In the second embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  In FIG. 14, reference numeral 31 denotes a pin fitting hole as a frame side engaging portion provided in the peripheral portion of the frame body 6, for example, the left rising wall portion 6 </ b> C. The pin fitting hole 31 is for inserting a pin member 32 described later. Moreover, since the pin fitting hole 31 is processed using a drill, it can be easily formed at an accurate position.

  Reference numeral 32 denotes a pin member as a cover side engaging portion provided on the lower flange 21 </ b> D of the left skirt cover 21. For example, the upper part of the pin member 32 is fixed integrally using a fixing means such as welding so as to protrude downward from the lower flange 21D. And the pin member 32 can position the lower part of the left skirt cover 21 in the horizontal direction by inserting it into the pin fitting hole 31 on the frame body 6 side from above as shown in FIG. .

  Thus, also in the second embodiment configured as described above, it is possible to obtain substantially the same operational effects as those of the first embodiment described above.

  In the first embodiment, a screw hole 6L is formed in the mounting seat 6K of the frame main body 6, and the hexagon socket head bolt 7 is screwed into the screw hole 6L, whereby the head of the hexagon socket head bolt 7 is obtained. The case where the portion 7A is used as the frame side engaging portion has been described as an example. Moreover, the case where the fitting hole 21E of each skirt cover 21 and 23 was formed as a through hole was illustrated.

  However, the present invention is not limited to these configurations. For example, as in the first modification shown in FIG. 16, the upper surface of the mounting seat 6K of the frame body 6 is partially projected to project as the frame-side engaging portion. The portion 41 may be integrally formed. Moreover, it is good also as a structure which forms the bottomed fitting hole 42 as press side etc. in the lower flange 21D of the left skirt cover 21 as a cover side engaging part.

  In the second embodiment, the pin member 32 is attached to the lower flange 21D of the left skirt cover 21 so as to protrude downward, and the pin member 32 is inserted into the pin fitting hole 31 on the frame body 6 side from above. The case where it was set as the structure to fit was illustrated. However, the present invention is not limited to this. For example, as in the second modification shown in FIG. 17, the protrusion 51 that forms the cover side engaging portion is formed on the lower flange 21 </ b> D of the left skirt cover 21 using press molding or the like. It is good also as a structure which carries out integral molding and fits this projection part 51 in the fitting hole 52 by the side of the frame main body 6. FIG.

  On the other hand, in the first embodiment, the hexagon socket head bolt 7 has been described as an example of the protruding body that forms the frame side engaging portion on the revolving frame 5 side. However, the present invention is not limited to this. For example, a pin may be used as a projecting body by driving a pin so that the upper part protrudes into a pin hole formed on the revolving frame 5 side.

  Further, in each embodiment, the crawler type hydraulic excavator 1 is described as an example of the construction machine. However, the present invention is not limited to this, and other construction machines such as a wheel type hydraulic excavator and a wheel loader are used. Can also be applied. Thus, when applied to other construction machines, the present invention can be applied not only to the skirt cover but also to other covers.

It is a front view which shows the hydraulic shovel applied to the 1st Embodiment of this invention. It is a top view which shows the hydraulic shovel of the state which abbreviate | omitted the working device. It is an external appearance perspective view which shows the upper turning body in FIG. 1 in the state which opened the engine cover. It is an external appearance perspective view which shows an upper revolving body in the state which removed various covers, a tank, etc. It is an external appearance perspective view which expands and shows a turning frame alone. It is an external appearance perspective view of the principal part expansion which shows the left side part of an upper revolving body. It is an external appearance perspective view of the principal part expansion which shows the state which removed the left skirt cover from the upper revolving body of FIG. It is an external appearance perspective view of the principal part expansion which shows the right side part of an upper revolving body. It is an external appearance perspective view of the principal part expansion which shows the state which removed the right skirt cover from the upper revolving body of FIG. It is the external appearance perspective view which looked at the single left skirt cover from the inner side. It is the external appearance perspective view which looked at the single right skirt cover from the inner side. It is sectional drawing of the principal part expansion which looked at the state which attached the left skirt cover to the turning frame side from the arrow XII-XII direction in FIG. It is a disassembled sectional view in the state which isolate | separated the turning frame and the left skirt cover. It is sectional drawing of the principal part expansion which looked at the fitting hole and pin member by the 2nd Embodiment of this invention from the same position as FIG. It is a disassembled sectional view in the state which isolate | separated the turning frame and the left skirt cover. It is a principal part expanded sectional view which shows the fitting hole and projection part by the 1st modification of this invention. It is a principal part expanded sectional view which shows the fitting hole and projection part by the 2nd modification of this invention.

Explanation of symbols

1 Excavator (construction machine)
2 Lower traveling body 3 Upper revolving body 4 Working device 5 Revolving frame 6 Frame main body 6A Bottom plate 6B Front rising wall (periphery)
6C Left rising wall (periphery)
6D Right rising wall (periphery)
6K Mounting seat 6L Screw hole 7 Hexagon socket head cap screw 7A Head (frame side engaging part, projecting body)
9 Engine (equipped equipment, power source)
10 Hydraulic pump (equipped equipment, power source)
11 Heat exchanger mount (equipped equipment)
11B Screw seat 12 Heat exchanger (equipped equipment)
13 Battery mount (equipment)
13A Mounting bracket (screw seat)
14 Battery (equipped equipment)
15 Fuel tank (equipped equipment)
16 Hydraulic oil tank (equipped equipment)
19 Lever stand (equipped equipment, control device)
19A Frame 19B Work control lever 19C Travel control lever 19D Cosmetic cover 19E Left mounting bracket (screw seat)
19F Right mounting bracket (screw seat)
21 Left skirt cover (cover)
21A, 23A Front part 21B, 23B Side part 21C, 23C Upper flange 21D, 23D Lower flange 21E, 23E, 42 Fitting hole (cover side engaging part)
21F, 23F Bolt insertion hole 22 Bolt 23 Right skirt cover (cover)
31 pin fitting hole (frame side engaging part)
32 pin member (cover side engaging part)
41 Protruding part (frame side engaging part)
51 Protruding part (cover side engaging part)
52 Fitting hole (frame side engaging part)

Claims (2)

A vehicle body frame that forms a support structure, a power source mounted on the vehicle body frame, a mounted device that includes a control device, and a part of the periphery of the vehicle body frame that stands up from a part of the periphery of the vehicle body frame. In a construction machine comprising a cover having an upper flange and a lower flange at an upper position and a lower position,
A frame side engagement portion is provided at a position facing the lower flange of the cover on the peripheral portion of the vehicle body frame,
The mounting device is provided with a screw seat for fixing the upper flange to the vehicle body frame side at a height position corresponding to the upper flange of the cover,
The cover is provided with a cover-side engagement portion that engages the frame-side engagement portion in a positioning state on the lower flange, and a bolt insertion hole is provided at a position corresponding to the screw seat on the upper flange.
With the frame side engaging portion engaged with the cover flange engaging portion of the lower flange, the cover is fixed to the vehicle body frame side by inserting the bolt through hole and screwing the bolt to the screw seat. Construction machine characterized by having a configuration to do. The said frame side engaging part is comprised by the protruding body protrudingly provided in the peripheral part of the said vehicle body frame, and the said cover side engaging part is comprised by the fitting hole fitted to the said protruding body. The construction machine according to 1.

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