JP6680443B2 - Supporting device for working machine and its cover - Google Patents

Description

  BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cover support mounting device for a work machine that mounts a support that supports a cover to a frame, and a work machine including the support support mounting device.

  Conventionally, an upper revolving structure used in a work machine such as a hydraulic excavator is assembled by welding a plurality of structures. Therefore, distortion may occur in each member during welding, and the dimensional accuracy may decrease. In particular, when the plurality of exterior covers are attached to the frame, if the frame is distorted, the appearance may be affected, such as the gap between the covers becoming large or interference. Specifically, for example, when welding a reinforcing side surface called a channel to the outer edge portion of the bottom plate of the frame, the entire channel may be distorted and deformed in the front-back, left-right, and up-down directions. It is not easy to get the mounting position accuracy of the support. If the accuracy of the mounting position is poor in this way, it may be difficult to assemble the support, or it may be difficult to temporarily place the support depending on the structure, resulting in poor assembling performance.

  In this respect, the base part is welded to the reinforcing member located inside the channel of the frame, the support part is welded on this base part, and the lower end part of the support of the cover laid outside the support part is bolted. A structure in which the support part is fastened and fixed (for example, refer to Patent Document 1), and the support part is welded to the upper surface of the frame, and the lower end part of the support of the cover laid outside the support part is fixed to the support part by bolts. A configuration for fastening is known (see, for example, Patent Document 2).

  However, in the case of these configurations, by adjusting the welding position of the support portion in the front-rear direction and the left-right direction, it is possible to deal with the dimensional distortion in the front-rear direction and the left-right direction, but the position cannot be adjusted in the up-down direction.

  In addition, a long mounting plate is erected vertically on the outside of the channel of the frame, and the positioning plate protruding from the support of the cover is placed and positioned on the upper part of this mounting plate. There is known a configuration in which a lower end portion of a support stacked on the inner side is fastened and fixed to a mounting support with a bolt (for example, refer to Patent Document 3).

  However, in the case of this configuration, when the cover is assembled, the positioning plate of the support of the cover to be temporarily assembled is placed on the upper surface of the thin mounting plate, resulting in an unstable temporary assembled state. Since it is fastened with bolts in this state, the workability of assembly is not good.

JP, 2005-299197, A Japanese Utility Model Publication No. 6-63657 JP, 2007-138483, A

  As described above, when assembling the cover, it is desired to have a configuration in which the position of the support can be adjusted in the front-rear direction, the left-right direction, and the up-down direction, and the support can be temporarily assembled in a stable state.

  The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a strut mounting device for a cover of a working machine that can adjust and assemble a strut in a stable state to an appropriate position, and a working machine including the same. It is intended.

The invention according to claim 1 is a cover support mounting device for a working machine, which mounts a support for supporting a cover along a vertical direction on a frame having a mounting surface along a vertical direction. A bracket portion fixed to the bracket portion, and a mounting portion that is fixed to the bracket portion at a position away from the mounting surface portion and defines an insertion space into which the lower end side of the support pillar is inserted between the mounting surface portion and the bracket portion. A mounting device for a cover of a working machine, comprising: a mounting hole, which is provided in this mounting part, and which is used to fasten and fix the lower end side of the supporting column of the cover inserted into the insertion space to the mounting part with an inserted bolt. .

  The invention according to claim 2 is a frame provided with a mounting surface portion extending in the up-down direction, a column extending in the up-down direction, a cover supported by the column, a column supporting device for a cover according to claim 1, which mounts the column to the frame. A working machine including a machine body having a bolt and a work device operably provided on the machine body.

  According to the first aspect of the present invention, the fixing position of the bracket portion whose upper side is open is set along the mounting surface portion, and the fixing position of the mounting portion is set to the bracket portion toward and away from the mounting surface portion. By setting to, the position of the mounting hole provided in the mounting portion and the fastening surface of the mounting portion can be adjusted in three directions orthogonal to each other, and mounting is performed with the lower end side of the column supporting the cover inserted in the insertion space. Since the bolt can be inserted into the hole to fasten the lower end of the column to the mounting portion, the cover can be adjusted to an appropriate position and assembled in a stable state.

  According to the second aspect of the present invention, the cover can be easily assembled to the frame at an appropriate position, so that it is possible to provide an inexpensive working machine having a better appearance and reliability.

It is an exploded perspective view showing the important section of one embodiment of the support pillar attachment device for the working machine concerning the present invention. It is a perspective view which shows the principal part of the support | pillar attachment apparatus for covers of a working machine same as the above from a back side. (A) is a perspective view showing the mounting work of the bracket mounting part of the cover supporting device for the working machine of the same as above, and (b) is mounting the mounting part of the supporting support mounting device for cover of the same working machine to the bracket part. It is a perspective view showing work. It is a perspective view which shows the frame which attaches the support | pillar attachment apparatus for covers of a working machine same as the above. It is a side view which shows the working machine provided with the support | pillar attachment apparatus for covers of a working machine same as the above. It is a perspective view which shows the lower end side of the support | pillar of other embodiment of the support | pillar attachment apparatus for covers of the working machine which concerns on this invention.

  Hereinafter, the present invention will be described in detail based on the embodiment shown in FIGS. 1 to 5.

  As shown in FIG. 5, a hydraulic excavator 11 as a working machine includes an underbody 14 including a crawler type undercarriage 12 and an upper revolving superstructure 13 rotatably provided on the undercarriage 12, and the undercarriage 14 (Working device 15 provided on the upper revolving structure 13). A cab 16 is mounted on the front side of the upper swing body 13, and a machine room 17 such as an engine, a counterweight 18, a fuel tank (not shown) for storing fuel, and a hydraulic oil tank for storing hydraulic oil are provided on the rear side of the upper revolving structure 13. (Not shown) and the like are mounted. Further, in the working device 15, a boom 21 and a boom cylinder 22 that rotates the boom 21 are pivotally supported by the upper swing body 13, and a stick 23 is pivotally supported by a stick cylinder 24 at the tip of the boom 21. The bucket 25 is rotatably supported at the tip of the stick 23 by a bucket cylinder 26. The hydraulic excavator 11 is capable of excavating earth and sand by operating the working device 15 and rotating the upper swing body 13 relative to the lower traveling body 12. In addition, hereinafter, the front-rear direction and the left-right direction in the present embodiment are the front-rear direction and the left-right direction viewed by an operator who is seated in the cab 16.

  The upper revolving structure 13 includes a revolving frame 31 which is a frame as a base shown in FIG. 4, and the revolving frame 31 is provided with a bottom plate 33, and is erected on the bottom plate 33 and is spaced in the left-right direction in the front-rear direction. A pair of left and right vertical plates 34, 35, a left support member 36 as a plurality of (one) beam members extending leftward from the outer surface of the left vertical plate 34, and a vertical plate positioned on the right side. A right support member 37 as a plurality of (other) beam members extending rightward from the outer surface of 35, and an extension end of a plurality of left support members 36 extending in the front-rear direction (one) A left skirt channel 38 serving as a mounting surface portion, and a right skirt channel 39 serving as a mounting surface portion (another) connected to each of the extending ends of the plurality of right support members 37 and extending in the front-rear direction are provided.

  The vertical plates 34, 35 are formed in a substantially triangular shape when viewed from the side, and their lower ends are welded and fixed near the both sides of the bottom plate 33. These vertical plates 34, 35 are provided with boom foot pin mounting holes 41, 42 that pivotally support the base end of the boom 21 at the highest position, and have a shape that changes so that the height becomes lower as they are separated in the longitudinal direction. Has become. Boom cylinder mounting holes 43 and 44 that pivotally support the base end of the boom cylinder 22 are provided at the front ends of the vertical plates 34 and 35.

  The left support member 36 is also called a left skirt beam and supports the load of a load such as the cab 16. A plurality of left support members 36 are provided apart from each other in the front-rear direction, the base end side is welded to the vertical plate 34, and the tip end side is welded to the left skirt channel 38.

  The right support member 37 is also called a right skirt beam, and supports the load of a mounted object such as a fuel tank or a hydraulic oil tank. A plurality of these right support members 37 are provided apart from each other in the front-rear direction, the base end side is welded to the vertical plate 35, and the tip end side is welded to the right skirt channel 39.

  The left skirt channel 38 is a reinforcing plate that is also called a left side frame skirt portion, and is erected vertically and constitutes the left side surface of the revolving frame 31.

  The right skirt channel 39 is a reinforcing plate also called a right side frame skirt portion, and is erected in the up-down direction and constitutes the right side surface of the revolving frame 31.

  As shown in FIG. 1, the skirt channels 38, 39 support an outer cover 46 (FIG. 5) that covers the cab 16, the machine room 17 (FIG. 5), the fuel tank, the hydraulic oil tank, and the like. The exterior cover frame 47, which is a column, is attached to the upper part via a cover column attachment device 48 (hereinafter, simply referred to as attachment device 48).

  The mounting device 48 includes a bracket portion 51, a mounting plate 52 as a mounting portion welded to the bracket portion 51, a mounting hole 53 provided in the mounting plate 52, and a bolt 54 inserted into the mounting hole 53. It has and. The mounting device 48 is arranged inside the skirt channels 38, 39, that is, on the mounting surfaces 38a, 39a that are the side surfaces on the side of the vertical plates 34, 35, and is in a position that cannot be seen from the outside of the machine body of the hydraulic excavator 11. .

  The bracket portion 51 is formed in a U shape (horseshoe shape) from metal such as steel. That is, the bracket portion 51 has an opening 51a at one end and a lower support portion 51b formed in an arc shape at the other end, and the front and rear of the opening 51a serve as the support portions 51c and 51c. ing. In the bracket portion 51, the outer edges of the lower support portion 51b and the support portions 51c, 51c are welded to the skirt channels 38, 39 with the opening 51a as the upper side. Therefore, the bracket portion 51 is welded and fixed to the skirt channels 38 and 39, and one side in the left and right direction, which is one side in the thickness direction (depth direction), is closed by the skirt channels 38 and 39. The other side in the left-right direction, which is the other side in the depth direction, is a mounting opening 51d to which the mounting plate 52 is mounted. Specifically, in the attachment device 48 attached to the left skirt channel 38, the right side of the bracket portion 51 is the attachment opening 51d, and in the attachment device 48 attached to the right skirt channel 39, the left side of the bracket portion 51 is. It is a mounting opening 51d. In the present embodiment, the bracket portion 51 (support portions 51c, 51c) has a thickness that gradually increases from the lower support portion 51b toward the opening 51a, that is, from the lower side to the upper side. Although formed, this thickness may be formed according to the angle of the mounting surfaces 38a, 39a of the skirt channels 38, 39.

  The mounting plate 52 is formed of a metal such as steel in a D shape. The mounting plate 52 is a separate body from the bracket portion 51 in advance, and is integrated with the bracket portion 51 by welding. The mounting plate 52 is welded so as to close the mounting opening 51d of the bracket portion 51. Therefore, the mounting plate 52 is arranged at a position apart from the mounting surfaces 38a, 39a of the skirt channels 38, 39 in the left-right direction which is the thickness direction of the skirt channels 38, 39. In other words, the mounting plate 52 faces the mounting surfaces 38a, 39a of the skirt channels 38, 39 with a predetermined gap. Therefore, the mounting plate 52 defines an insertion space 57 into which the lower end side of the exterior cover frame 47 is inserted, between the skirt channels 38, 39 and the bracket portion 51. Therefore, the front and rear of the insertion space 57 are regulated by the bracket portion 51 (support portions 51c, 51c), the lower portion is regulated by the bracket portion 51 (lower support portion 51b), and the left and right portions are the skirt channels 38, 39 and the mounting plate. Each is regulated by 52, and the upper portion is opened by an opening 51a. The welding position of the mounting plate 52 with respect to the bracket portion 51 is set according to the thickness of the lower end side of the exterior cover frame 47. For example, the lower support portion 51b to the support portions 51c, 51c of the bracket portion 51 have a predetermined thickness. It may be a half-mounting welding that is welded in a state where the bracket plate 51 and the mounting plate 52 are grooved at positions facing each other, and the mounting plate 52 is welded at the position of the groove. The strength can also be improved by so-called groove welding, which is integrated with the bracket portion 51. Further, the insertion space 57 side of the attachment plate 52 is a flat fastening surface 52s that defines the attachment angle of the exterior cover frame 47.

  The mounting hole 53 has a round hole shape and is provided so as to penetrate the mounting plate 52 in the thickness direction. In the present embodiment, a plurality of, for example, two mounting holes 53 are provided in the mounting plate 52. Then, the mounting holes 53 are arranged at vertically separated positions on the mounting plate 52 with the mounting device 48 mounted on the skirt channels 38, 39.

  The bolts 54 are inserted into the respective mounting holes 53 from the outside of the mounting plate 52, that is, from the side opposite to the insertion space 57.

  The outer cover frame 47 supports the outer cover 46 (FIG. 5) by attaching the outer cover 46 (FIG. 5) with bolts or hinges. The exterior cover frame 47 is arranged substantially vertically along the vertical direction. The exterior cover frame 47 includes a frame main body 61 that is, for example, a pillar main body formed in a U-shaped cross section, and a cutout portion 62 is cut out at a lower end portion of the frame main body 61. At the position of the cutout portion 62, a mounted plate 63 that is a mounted portion is mounted. The mounting plate 63 is provided with two insertion holes 64 into which the bolts 54 are inserted, corresponding to the mounting holes 53 of the mounting plate 52, that is, two vertically spaced apart in the present embodiment. Nuts 65 (FIG. 2) for screwing the bolts 54 are integrally provided on the back side. The mounted plate 63, the insertion hole 64, and the nut 65 form a mounted fixed portion 66 that is mounted and fixed to the mounting device 48 at the lower end portion of the exterior cover frame 47.

  The notch portion 62 is provided inside the frame body 61, that is, at a position opposite to the skirt channels 38 and 39 in a notch shape, for example, in a rectangular shape. Therefore, the lower end side (attached fixed portion 66) of the frame body 61 (exterior cover frame 47) is formed so as to have a smaller thickness in the left-right direction than the upper portion thereof.

  The plate 63 to be attached is provided by being bent in an L-shape (inverted L-shape) along the notch 62 by a metal such as steel, and is integrally fixed to the frame body 61 by, for example, welding. . Therefore, the mounted plate 63 is positioned above the notch 62 and extends in the front-rear, left-right direction in a planar manner, and the supported plate 63a extends in the front-rear and vertical directions along the notch 62 in the front-rear direction. And an abutting portion 63b extending to the. The surface of the contact portion 63b is a flat fastening surface 63s that faces and abuts the fastening surface 52s of the capitalization plate 52.

  In the present embodiment, the insertion hole 64 is formed in a round hole shape, and is provided as a through hole that penetrates the attached plate 63 (contact portion 63b) in the thickness direction.

  The nut 65 shown in FIG. 2 is coaxially integrated with the insertion hole 64 and is fixed to the rear surface side of the plate 63 (contact portion 63b) to be mounted.

  Next, a mounting operation of the exterior cover 46 of the illustrated embodiment will be described.

  First, the attachment device 48 is attached to the skirt channels 38, 39. In this attachment device 48, first, the bracket portion 51 is welded to the attachment surfaces 38a, 39a of the skirt channels 38, 39 (FIG. 3 (a)). At this time, even if the swivel frame 31, particularly the skirt channels 38, 39 is distorted due to welding or the like when the swivel frame 31 is formed, predetermined mounting in the front-back direction and the vertical direction, which is the direction along the mounting surfaces 38a, 39a. The bracket portion 51 is welded to the mounting surfaces 38a, 39a of the skirt channels 38, 39 after alignment using a predetermined jig so that the position can be obtained.

  Next, a predetermined jig is used for the bracket portion 51 welded and fixed to the mounting surfaces 38a, 39a of the skirt channels 38, 39, and the position of the mounting plate 52 is set in the left-right direction, that is, in the thickness direction (depth) with respect to the bracket portion 51. Direction) is set in a direction perpendicular to the mounting surfaces 38a, 39a of the skirt channels 38, 39, and the mounting plate 52 is welded to the bracket portion 51 (FIG. 3 (b)). As a result, the mounting plate 52, that is, the mounting hole 53 provided in the mounting plate 52 is installed at the correct position in the front-rear direction, the vertical direction, and the left-right direction through the bracket portion 51, and the mounting plate 52 The fastening surface 52s is set along the vertical and horizontal directions without any inclination.

  Thereafter, as shown in FIG. 1, the attachment fixing portion 66 of the exterior cover frame 47 is surrounded by the skirt channels 38 and 39, the bracket portion 51, and the attachment plate 52, and has a bag-like (pocket-like) insertion space 57. Is inserted from the opening 51a, that is, from above. In this state, the supported portion 63a of the mounted plate 63 is supported on the upper end of the mounting plate 52, and the abutting portion 63a of the mounted plate 63 connects the mounting plate 52 and the mounting surfaces 38a, 39a of the skirt channels 38, 39. It is sandwiched between and supported by abutting on the back side of the mounting plate 52.

  Then, when the bolts 54 are inserted into the mounting holes 53 and the insertion holes 64 and tightened, the bolts 54 are screwed into the nuts 65 (FIG. 2) of the exterior cover frame 47, whereby the mounted plate 63 (the mounted fixing portion 66). ) Is fastened to the mounting plate 52 and fixed to the swivel frame 31. Next, the exterior cover 46 is appropriately attached to the fixed exterior cover frame 47 via a hinge or a bolt.

  Next, the effects of the illustrated embodiment will be listed.

  The fixing position of the bracket portion 51 is set along the skirt channels 38, 39 (mounting surfaces 38a, 39a), that is, in the up-down direction and the front-back direction, and the fixing position of the mounting plate 52 is set with respect to the bracket portion 51. , 39 (mounting surfaces 38a, 39a) are set closer to and away from each other, that is, in the left-right direction, so that the position of the mounting hole 53 provided in the mounting plate 52 and the fastening surface 52s of the plate 52 are orthogonal to each other in the vertical and horizontal directions. The lower end side of the outer cover frame 47 that supports the outer cover 46 in the bag-shaped insertion space 57 (attached fixed portion 66). With the bolts 54 inserted into the mounting holes 53 with the inserts inserted, the lower end side (fixed mounting portion 66) of the outer cover frame 47 can be fastened and fixed to the mounting plate 52, so that the outer cover 46 remains stable. Can be adjusted to an appropriate position and assembled.

  That is, since the insertion space 57 is in the shape of a bag, by inserting the lower end side (fixed attachment portion 66) of the exterior cover frame 47 into the insertion space 57 from above, the exterior cover frame 47 is temporarily placed before bolting. However, it is held stable and does not fall during work. Therefore, it is not necessary to temporarily insert the bolts 54 at the time of temporary assembly or to perform assembly work by a large number of people, and the workability of assembling the exterior cover 46 is improved.

  Since the exterior cover 46 can be easily assembled to the swivel frame 31 at an appropriate position as described above, the hydraulic excavator 11 having a better appearance and reliability and being inexpensive can be provided.

  In addition, in the above-described one embodiment, as in the other embodiment shown in FIG. 6, the attached fixing portion 66 on the lower end side of the exterior cover frame 47 is replaced with the attached plate 63 instead of the attached plate 63. The attached block 68 may be provided. The mounted block 68 is integrally fixed to the frame body 61 by welding, for example, and is exposed to the inside of the frame body 61 from the notch 62. In addition, a bolt hole 69, which is an insertion hole into which the bolt 54 is screwed, is provided in the mounted block 68 so as to correspond to the mounting hole 53. In this configuration, in the state where the fixed attachment portion 66 is inserted into the insertion space 57 from the opening 51a, that is, from above, the upper portion of the notch portion 62 serves as the supported portion supported by the upper end of the mounting plate 52, and the mounted block 68 serves as an abutting portion sandwiched between the mounting plate 52 and the mounting surfaces 38a, 39a of the skirt channels 38, 39 and abuttingly supported on the rear surface side of the mounting plate 52. Then, with the attached fixing portion 66 inserted into the insertion space 57, the bolt 54 is inserted into the attaching hole 53 and tightened in the bolt hole 69, whereby the attached block 68 (attached fixing portion 66) is removed. It is possible to achieve the same effect as that of the above-described embodiment, such as being fastened to the mounting plate 52 and fixed to the swivel frame 31.

  Further, in each of the above-described embodiments, the mounting device 48 is attached to each of the skirt channels 38, 39, but the mounting device 48 may be attached to the vertical plates 34, 35, for example. That is, the attachment device 48 can be applied not only to the skirt channels 38 and 39 as long as it is an attachment surface portion that is erected in the up-down direction at a position where the lower end side of the exterior cover frame 47 is fixed.

  Further, the bracket portion 51 can be, for example, V-shaped or U-shaped if the upper side is open, and the lower side is closed if the lower end side of the exterior cover frame 47 (attached fixed portion 66) can be supported. It does not have to be done.

  Further, the revolving frame 31 of the present invention is not limited to the hydraulic excavator, but can be applied to, for example, a self-propelled or fixed installation type crane.

  Further, the invention is not limited to the revolving frame 31 of the upper revolving structure 13 and can be applied to the body of another working machine in which the lower end side of the support column is fixed to any frame.

  INDUSTRIAL APPLICABILITY The present invention can be used by businesses involved in manufacturing revolving structures such as hydraulic excavators and cranes, and working machines.

11 Hydraulic excavator as a working machine
14 aircraft
15 Working device
Swivel frame which is 31 frame
38 Left skirt channel as mounting surface
39 Right skirt channel as mounting surface
Exterior cover that is a cover
47 Exterior cover frame that is a pillar
48 Support mounting device for cover
51 Bracket part
52 Mounting plate as mounting part
53 Mounting hole
54 volt
57 Insertion space

Claims (2)

A strut mounting device for a cover of a working machine, which mounts a strut supporting a cover along a vertical direction to a frame having a mounting surface portion along the vertical direction,
A bracket part fixed to the mounting surface part with the upper side open,
A mounting portion that is fixed to the bracket portion at a position away from the mounting surface portion and that defines an insertion space into which the lower end side of the support pillar is inserted between the mounting surface portion and the bracket portion,
And a mounting hole for fastening the lower end side of the support column of the cover inserted into the insertion space to the mounting part with the inserted bolt. Mounting device. A frame having a mounting surface portion extending in the up-down direction, a column extending in the up-down direction, a cover supported by the column, a column supporting device for a cover according to claim 1, and a machine body having a bolt,
A working machine comprising: a working device operably provided on the machine body.

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