JP5132357B2 - Work vehicle - Google Patents

Description

  The present invention relates to a work vehicle.

  The work vehicle includes a work machine and a main body frame, and the work machine is attached to the main body frame. The work machine has, for example, a boom and an arm that are rotatably connected to each other, and a work attachment such as a bucket is attached to the tip of the arm. In order to support such a working machine, the main body frame is provided with a pair of vertical plate portions. The pair of vertical plate portions are arranged on the bottom surface portion of the main body frame at a distance from each other.

The work vehicle is provided with a cover member supported by the frame portion. A cover member is a member which comprises the outer surface of a work vehicle. The frame portion that supports the cover member has a plurality of column members, and the plurality of column members are attached to the main body frame by fixing the lower end portions thereof to the bottom surface portion of the main body frame (Patent Literature). 1).
JP 2006-335329 A

  In the work vehicle as described above, the lower end portion of the column member is fixed to the bottom surface portion of the main body frame. For this reason, it is difficult to approach the fixed portion between the column member and the main body frame after the cover member is attached at the time of manufacturing or repairing the work vehicle. For this reason, even if an error occurs in the attachment position of the cover member, the fixing between the column member and the main body frame cannot be easily loosened, and it is difficult to adjust the position of the cover member. For example, when the cover member to be horizontally disposed is disposed slightly inclined, if the fixing of the column member can be loosened, the position of the cover member can be adjusted to be horizontal. However, in the conventional work vehicle as described above, it is difficult to adjust the position of the cover member.

  The subject of this invention is providing the work vehicle which can perform the position adjustment of a cover member easily.

A work vehicle according to a first invention includes a work implement, a main body frame, a frame portion, and a cover member. The main body frame has a bottom surface portion and a pair of vertical plate portions. The pair of vertical plate portions are arranged at a distance from each other on the bottom surface portion, and the work machine is attached thereto. The frame portion has a plurality of column members. The plurality of column members are attached to the main body frame and provided along the vertical direction. The cover member constitutes the outer surface of the vehicle and is supported by the frame portion. The plurality of column members include a first column member and a second column member that support the cover member . The 1st pillar member and the 2nd pillar member are being fixed to the side of a vertical board part so that position adjustment is possible. At least one of the first pillar member and a second pillar member is fixed to the inner side surface of the vertical plate portion, the lower end portion of the first pillar member and the lower end portion of the second column member, above the bottom portion Located in.

In this work vehicle, at least one of the first pillar member and the second column member is fixed to the inner side surface of the vertical plate portion, the lower end portion of the first pillar member and the lower end portion of the second column member, the bottom surface It is located above the part. For this reason, compared with the case where a 1st pillar member and a 2nd pillar member are fixed to a bottom face part, it can approach to the fixed part of a 1st pillar member, a 2nd pillar member, and a main body frame easily. Therefore, the position adjustment of the first pillar member and the second pillar member can be easily performed, and as a result, the position adjustment of the cover member can be easily performed.

A work vehicle according to a second aspect of the present invention is the work vehicle of the first aspect, wherein the first column member and the second column member are fixed to the inner side surface of the vertical plate portion.

In this work vehicle, since the pair of vertical plate portions are arranged at a distance from each other, a predetermined space is secured in the inner portion of the vertical plate portion. Therefore, in this work vehicle, the first column member and the second column member are fixed to the inner side surface of the vertical plate portion, thereby easily approaching the fixed portion of the first column member, the second column member , and the vertical plate portion. Become.

  A work vehicle according to a third aspect of the present invention is the work vehicle of the second aspect, further comprising a cab. The cab is disposed on one side of the pair of vertical plate portions on the main body frame. And a 1st pillar member is fixed to the inner surface of the vertical board part adjacent to a cab among a pair of vertical board parts.

  In this work vehicle, the first pillar member is fixed to the inner side surface of the vertical plate portion adjacent to the cab, that is, the side surface located on the side opposite to the side facing the cab. For this reason, compared with the case where a 1st pillar member is fixed to the outer side surface which faces a cab, it can suppress that a cab interferes when approaching the fixed part of a 1st pillar member and a vertical board part.

A work vehicle according to a fourth aspect of the present invention is the work vehicle of the third aspect , wherein the second column member is on the inner surface of the vertical plate portion of the pair of vertical plate portions to which the first column member is not fixed. that has been fixed.

  In this work vehicle, the first column member is fixed to the inner side surface of one vertical plate portion, and the second column member is fixed to the inner side surface of the other vertical plate portion. And the lower end part of a 1st pillar member and a 2nd pillar member is located above a bottom face part, respectively. For this reason, position adjustment with a 1st pillar member and a 2nd pillar member can be performed easily. Thereby, position adjustment of a cover member can be performed still more easily.

In the work vehicle according to the present invention includes a first columnar member at least one of the second pillar member is fixed to the inner side surface of the vertical plate portion, and a lower end of the lower portion and the second columnar member of the first pillar members Is located above the bottom surface. For this reason, compared with the case where a 1st pillar member and a 2nd pillar member are fixed to a bottom face part, it can approach to the fixed part of a 1st pillar member, a 2nd pillar member, and a main body frame easily. Therefore, the position adjustment of the first pillar member and the second pillar member can be easily performed, and as a result, the position adjustment of the cover member can be easily performed.

1. Overall Structure FIG. 1 shows a work vehicle 100 according to an embodiment of the present invention. FIG. 1 is a side view of work vehicle 100. The work vehicle 100 is a so-called hydraulic excavator, and includes a traveling body 1, a work implement 2, and a turning body 3. In the following description, the terms “left and right”, “front and rear”, and “rear front” refer to the direction in which the operator sits on a chair in the cab 13 (the direction from the counterweight 15 to the work implement 2 in FIG. 1). ) As a reference.

  The traveling body 1 has a crawler-type traveling mechanism, and causes the work vehicle 100 to travel when the crawler belt 11 is rotationally driven.

  The work machine 2 is attached to the front part of the revolving structure 3 and is used for performing various operations such as excavation. The work machine 2 includes a boom 21, an arm 22, a bucket 23, and various hydraulic cylinders 24 to 26. The boom 21 is rotatably attached to the revolving structure 3 and is driven by a boom cylinder 24. The arm 22 is rotatably attached to the boom 21 and is driven by an arm cylinder 25. The bucket 23 is rotatably attached to the arm 22 and is driven by a bucket cylinder 26. The work implement 2 can perform work such as excavation while moving the boom 21, the arm 22, and the bucket 23 up and down by the hydraulic cylinders 24 to 26.

The swivel body 3 is placed on the traveling body 1 via the swivel device 12 and can swivel about a rotation axis extending in the vertical direction. Hereinafter, the structure of the revolving structure 3 will be described in detail.
2. Detailed Structure of Revolving Body 3 The revolving body 3 has a cab 13, an engine 14, and a counterweight 15 as shown in FIG. Further, as shown in FIG. 2, the revolving unit 3 includes a tank part 16, a body frame 17, an exterior cover 18, a first frame part 19 (see FIG. 3), and a second frame part 20 (see FIGS. 3 and 5). have.

  The cab 13 is a box-shaped structure in which a space for an operator is formed. Inside the cab 13 are provided a seat on which an operator sits, operating members such as levers and pedals, and various instruments (not shown). The cab 13 is placed on the left front portion of the main body frame 17 and is located on the left side of the work machine 2. Specifically, the cab 13 is disposed on the left side of a pair of vertical plate portions 35 and 36 (see FIG. 2) described later and in front of an engine room R described later.

  The tank unit 16 shown in FIG. 2 includes a fuel tank 16a, a hydraulic oil tank 16b, and piping (not shown) for these devices. The tank portion 16 is placed on the right front portion of the main body frame 17 and is located on the right side of the work machine 2. Specifically, the tank portion 16 is disposed on the right side of the pair of vertical plate portions 35 and 36 and in front of the engine room R.

  The engine 14 shown in FIG. 1 is a drive source for driving the traveling body 1 and the work implement 2 and is disposed in the engine room R.

  A main body frame 17 shown in FIG. 2 is a frame on which the above-described cab 13, engine 14, counterweight 15 and the like are placed, and includes a center frame 31, a first side frame 32, and a second side frame 33. .

  The center frame 31 is located at the center of the main body frame 17 in the left-right direction, and is a part attached to the above-described turning device 12. The center frame 31 includes a bottom surface portion 34, a pair of vertical plate portions 35 and 36, and a front plate portion 37.

  The bottom surface portion 34 is a plate-like member that forms the bottom surface of the center frame 31 and is disposed horizontally.

  The pair of vertical plate portions 35 and 36 are plate-like members extending in the front-rear direction, and are erected on the bottom surface portion 34. The vertical plate portions 35 and 36 are arranged on the bottom surface portion 34 at a distance from each other in the left-right direction.

  The front plate portion 37 is provided between the front end portions of the vertical plate portions 35 and 36 in order to reinforce the vertical plate portions 35 and 36. Brackets 38 to 41 are provided on the front plate portion 37. The brackets 38 to 41 are provided with holes penetrating in the left-right direction. Of the vertical plate portions 35, 36, holes are also provided in portions facing these brackets 38 to 41, and the work machine 2 is connected via a locking pin (not shown) passed through these holes. It is attached between the vertical plate portions 35 and 36. An opening 42 is provided in the lower portion of the front plate portion 37, and hydraulic piping extending to the hydraulic cylinders 24 to 26 of the work machine 2 is passed through the opening 42.

  The first side frame 32 is connected to the left side portion of the center frame 31. The cab 13 is placed on the front portion of the first side frame 32.

  The second side frame 33 is connected to the right side portion of the center frame 31. The tank portion 16 is placed on the second side frame 33.

  The counterweight 15 is provided at the rear portion of the main body frame 17 in order to balance the vehicle body during excavation and the like. The counterweight 15 is made by, for example, putting scrap iron or concrete into a box formed by assembling steel plates and hardening it. The back surface of the counterweight 15 faces the outside of the work vehicle 100 and has a smoothly curved shape. On the other hand, as shown in FIG. 3, the front surface of the counterweight 15 has a complicated concave and convex shape, and is a concave portion 43 that has a concave shape from the front side toward the rear as a whole. The recess 43 reaches the upper surface of the counterweight 15, and the upper part of the space surrounded by the recess 43 is covered with a first cover member 44 (see FIG. 2) described later. A space surrounded by the recess 43, that is, a space on the front side of the recess 43 is an engine room R in which the engine 14 is disposed. A step 51 is formed on the upper surface of the counterweight 15 along the edge of the recess 43. The step portion 51 is slightly lower than the other portion of the upper surface of the counterweight 15, and the rear end portion or the side end portion of the first cover member 44 described later is placed thereon.

  The exterior cover 18 shown in FIG. 2 is arranged facing the outside of the work vehicle 100 and constitutes the outer surface of the rear part of the revolving structure 3. The exterior cover 18 includes a first cover member 44 and a second cover member 45.

  The first cover member 44 is supported by the first frame portion 19 (see FIG. 3). The first cover member 44 is composed of a plurality of separate members, and is provided between a first beam member 59 (see FIG. 3) described later and the upper surface of the counterweight 15. For this reason, the rear end portion and the side end portion of the first cover member 44 have a shape that matches the stepped portion 51 of the counterweight 15. The front end portion of the first cover member 44 has a linear shape along the first beam member 59. The first cover member 44 includes a first member 52, a second member 53, and a third member 54. The first member 52 is located on the left side of the third member 54, and the second member 53 is located on the right side of the third member 54. The third member 54 is located between the first member 52 and the second member 53. The upper surface of the third member 54 is located above the upper surface of the counterweight 15, but the upper surface of the first member 52 and the upper surface of the second member 53 are disposed substantially flush with the upper surface of the counterweight 15. ing.

  The second cover member 45 is supported by the second frame portion 20 (see FIG. 3). The second cover member 45 covers the front and top of the engine room R. The second cover member 45 has an upper surface portion 55 and a partition wall portion 56.

  The upper surface portion 55 is disposed on a second beam member 64 (see FIG. 3) to be described later, and is substantially flush with the upper surface of the counterweight 15 and the upper surface of the first cover member 44. Further, the upper surface of the hydraulic oil tank 16b is located on the right side of the upper surface portion 55, and the upper surface portion 55 is substantially flush with the upper surface of the hydraulic oil tank 16b. The rear end portion of the upper surface portion 55 has a linear shape along the second beam member 64 and faces the front end portion of the first cover member 44. The upper surface portion 55 covers the upper portion of the engine room R together with the first cover member 44.

  The partition wall portion 56 is disposed substantially along the vertical direction, and the upper end of the partition wall portion 56 is connected to the front end of the upper surface portion 55. The partition wall 56 covers the front of the engine room R and partitions the engine room R from other spaces.

  As shown in FIG. 3, the first frame portion 19 is configured by a single first beam member 59. The first beam member 59 is provided across the right end portion and the left end portion of the recess 43 and is disposed horizontally. The first beam member 59 is attached to the counterweight 15 at the right end and the left end of the recess 43 and is fixed by a fixing means such as a bolt.

  The second frame portion 20 is disposed on the front side of the recess 43 and is attached to the main body frame 17. The second frame portion 20 includes a plurality of column members 61 to 63 and a plurality of beam members 64 and 65.

  The plurality of column members 61 to 63 are attached to the main body frame 17 and provided along the vertical direction. Here, the plurality of column members 61 to 63 include a first column member 61, a second column member 62, and a third column member 63.

  The first column member 61 is fixed to the inner side surface of the vertical plate portion 36 adjacent to the cab 13 among the pair of vertical plate portions 35 and 36. The first column member 61 is fixed to the vertical plate portion 36 by fixing means such as bolts. Moreover, the lower end part of the 1st pillar member 61 is located above the bottom face part 34, as shown in FIG. 4 is a cross-sectional view taken along the line IV-IV in FIG.

  The second column member 62 is disposed at a distance in the left-right direction with respect to the first column member 61, and is provided substantially symmetrically with respect to the first column member 61. The second column member 62 is fixed to the inner surface of the vertical plate portion 35 of the pair of vertical plate portions 35 and 36 to which the first column member 61 is not fixed. Similar to the first column member 61, the second column member 62 is fixed to the vertical plate portion 35 by fixing means such as bolts. Further, the lower end portion of the second column member 62 is located above the bottom surface portion 34.

  The third column member 63 is disposed with a distance in the left-right direction with respect to the first column member 61 and the second column member 62. The third column member 63 is disposed on the left side of the pair of vertical plate portions 35 and 36 and behind the cab 13. The lower end portion of the third column member 63 is fixed to the first side frame 32 by fixing means such as a bolt.

  The plurality of beam members 64 and 65 include a second beam member 64 and a third beam member 65.

  The second beam member 64 is provided across the first column member 61, the second column member 62, and the third column member 63. The second beam member 64 is fixed to the upper ends of the first column member 61, the second column member 62, and the third column member 63, and the first column member 61, the second column member 62, and the third column member 63. Is supported by. As described above, the second beam member 64 supports the upper surface portion 55 (see FIG. 2) of the second cover member 45. Further, the second beam member 64 is disposed horizontally and is disposed along the first beam member 59 so as to face the first beam member 59. However, the first beam member 59 and the second beam member 64 are not fixed to each other, and a seal that closes the gap between the first beam member 59 and the second beam member 64 is provided between them as shown in FIG. A member 66 is provided.

  The third beam member 65 is provided across the first column member 61 and the second column member 62. The third beam member 65 is fixed to an intermediate portion in the height direction of the first beam member 59 and the second beam member 64, and reinforces the first column member 61 and the second column member 62.

As described above, the first frame portion 19 and the second frame portion 20 are not fixed to each other and are provided independently. For this reason, the counterweight 15 can be detached from the main body frame 17 with the first frame portion 19 attached. When the counterweight 15 is removed from the main body frame 17, as shown in FIG. 5, the first frame portion 19 is removed from the main body frame 17, and the second frame portion 20 is left on the main body frame 17. Become.
3. Features In this work vehicle 100, the first pillar member 61 is fixed to the inner surface of the vertical plate portion 36 on the cab 13 side. A second column member 62 is fixed to the inner surface of the vertical plate portion 35 on the hydraulic oil tank 16b side. And the lower end part of the 1st pillar member 61 and the 2nd pillar member 62 is located above the bottom face part 34, respectively. For this reason, an operator's hand and tool can approach easily from the upper part to the fixed part of the 1st pillar member 61 and the vertical board part 36, and the fixed part of the 2nd pillar member 62 and the vertical board part 35. . Thereby, the position adjustment of the 1st pillar member 61 and the 2nd pillar member 62 can be performed easily, As a result, the position adjustment of the 2nd cover member 45 can be performed still more easily.
4). Other Embodiments In the above embodiment, both the first column member 61 and the second column member 62 are fixed to the inner side surfaces of the vertical plate portions 35 and 36. However, the first column member 61 is a vertical plate. The second pillar member 62 may be fixed to the outer surface of the vertical plate portion 35 while being fixed to the inner surface of the portion 36. However, as described above, it is easier to adjust the position of the second cover member 45 when both the first column member 61 and the second column member 62 are fixed to the inner side surfaces of the vertical plate portions 35 and 36. Can be done.

  In the above embodiment, a hydraulic excavator is exemplified as the work vehicle 100, but another type of work vehicle may be used as long as it includes the counterweight 15.

  The present invention has an effect of easily adjusting the position of the cover member, and is useful as a work vehicle.

The side view of a work vehicle. The perspective view which shows a part of structure of a turning body. The perspective view which shows the frame structure of a turning body. IV-IV sectional drawing in FIG. The figure which shows the state from which the counterweight was removed in FIG.

2 Working machine 13 Cab 17 Main body frame 20 Second frame part (frame part)
34 Bottom surface portions 35, 36 Vertical plate portion 45 Second cover member (cover member)
61 First pillar member 62 Second pillar member

Claims (4)

A working machine,
A main body frame having a bottom surface portion and a pair of vertical plate portions to which the working machine is attached and spaced apart from each other on the bottom surface portion;
A frame portion having a plurality of pillar members attached to the main body frame and provided along the vertical direction;
A cover member constituting the outer surface of the vehicle and supported by the frame portion;
With
The plurality of column members include a first column member and a second column member that support the cover member, and the first column member and the second column member can be adjusted in position on a side surface of the vertical plate portion. is fixed, the lower end of said at least one of the first pillar member and the second pillar member is fixed to an inner side surface of the vertical plate portion, wherein the lower end portion of the first pillar member second pillar member The part is located above the bottom part,
Work vehicle. The first pillar member and the second pillar member are fixed to an inner surface of the vertical plate portion,
The work vehicle according to claim 1. A cab disposed on one side of the pair of vertical plate portions on the main body frame;
The first column member is fixed to an inner surface of a vertical plate portion adjacent to the cab among the pair of vertical plate portions.
The work vehicle according to claim 2. Before Stories second column member that is fixed to the inner surface of the vertical plate portion of the person who is the first pillar member of the pair of the vertical plate portion not fixed,
The work vehicle according to claim 3.

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