Work vehicles

Abstract

To provide a work vehicle capable of easily and highly accurately positioning and assembling exterior parts of an upper body, and having a beautifully finished appearance.SOLUTION: A work vehicle 1 according to the present invention includes a lower body 2 to which a traveling device 10 is attached, an upper body 3 disposed on the lower body 2, work devices 12 and 14 operated by hydraulic pressure, and a control cabin 15. The upper body 3 includes a base frame 16 provided at a lower part, a first equipment room 21 provided at the rear part, a first cover 31 that covers the upper part of the first equipment room 21, a first stay 33A that supports the first cover 31 in an openable / closed or removable manner, and a hydraulic oil tank 23 that is attached to the base frame 16 and stores hydraulic oil. The hydraulic oil tank 23 is configured to also serve as a first stay fixing column to which the first stay 33A is fixed.SELECTED DRAWING: Figure 7

Description

[Technical field]

[0001] The present invention relates to a work vehicle equipped with a hydraulically operated working device. [Background technology]

[0002] As examples of work vehicles, excavators, loaders, etc. have been known that have a lower body on which tires or crawlers for traveling are attached, an upper body disposed on the lower body, and a working device attached to the lower body or upper body and operated hydraulically (see Patent Document 1: JP 2020-045731 A).

[0003] In a conventional work vehicle, a plurality of equipment compartments are provided on a base frame of an upper body, and a cover that can be opened, closed, or removed during maintenance or the like is attached to the top of each equipment compartment.

[0004] Furthermore, in working vehicles such as excavators, a counterweight is provided on the opposite side to the working device in order to balance the vehicle body during work (for example, during excavation). [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2020-045731 A Summary of the Invention [Problem to be solved by the invention]

[0006] In the manufacturing process of conventional work vehicles, the main components constituting the exterior of the upper body (hereinafter sometimes simply referred to as "exterior parts") include a base frame, a cover covering an equipment room, and a counterweight if the vehicle body is configured to be balanced during work (e.g., excavation). However, there are a large number of parts to be assembled, each of which has a complex three-dimensional shape and includes dimensional errors (tolerances), so there is a problem that they cannot be assembled as designed, or even if they can be assembled, there is a tendency for defects to occur, such as the width of the gaps formed at the boundaries between the exterior parts being uneven. Therefore, the above assembly work is not only time-consuming and labor-intensive, but also requires proficiency, i.e., advanced technical ability based on the experience and intuition of the worker, in order to finish the exterior appearance so that the gaps between the exterior parts are even. [Means for solving the problem]

[0007] The present invention has been made in consideration of the above circumstances, and aims to provide a work vehicle that can easily and accurately position and assemble multiple parts that make up the exterior of the upper body without being greatly affected by the experience or technical ability of the worker, and that can produce a beautiful appearance with uniform gaps between the assembled parts.

[0008] The present invention solves the above problems by the means described below.

[0009] The work vehicle according to this embodiment is a work vehicle comprising a lower body to which a traveling gear is attached, an upper body arranged on the lower body, a working gear attached to the lower body or the upper body and operated by the hydraulic pressure of hydraulic oil, and a cockpit for operating the traveling gear and the working gear, wherein the upper body has a base frame provided at the lower part, a first equipment compartment provided at the rear, a first cover covering an upper part of the first equipment compartment, a first stay supporting the first cover in an openable / closable or detachable manner, and a hydraulic oil tank attached to the base frame for storing the hydraulic oil, and wherein the hydraulic oil tank is configured to double as a first stay fixing pillar to which the first stay is fixed.

[0010] According to the above configuration, the hydraulic tank can be accurately positioned at a reference position (a predetermined position in the design) taking into consideration the tolerances of the hydraulic tank and the base frame. By using the hydraulic tank positioned in this way as a support for fixing the parts for mounting other exterior parts of the upper body, it becomes possible to easily and accurately position and assemble the parts for mounting the exterior parts of the upper body and the exterior parts. In addition, it is possible to achieve a beautiful appearance with uniform gaps between the assembled exterior parts. Furthermore, since there is no need to provide supports as dedicated parts, it is possible to reduce the number of parts, thereby reducing costs and simplifying the assembly process.

[0011] Further, it is preferable that the upper body has a first partition plate which separates the first equipment room from the cockpit or an equipment room on the cockpit side, and a second stay which supports the first cover together with the first stay so that it can be opened / closed or attached / detached, and that the first partition plate has the second stay fixed thereto, and that the hydraulic oil tank also serves as a first partition plate fixing support to which a portion of the first partition plate is fixed.

[0012] It is also preferable that the base frame has a plurality of tank mounting bases for mounting the hydraulic oil tank, and at least one of the tank mounting bases is formed separately from the base frame and fixed to the base frame.

[0013] Furthermore, it is preferable that the upper body has a second equipment chamber provided adjacent to the first equipment chamber, a second cover covering an upper portion of the second equipment chamber, and a third stay supporting the second cover in an openable / closable or detachable manner, and that the hydraulic oil tank is configured to also serve as a third stay fixing column to which the third stay is fixed.

[0014] It is also preferable that the upper body has a third partition plate provided below the gap formed at the boundary between the first cover and the second cover and equipped with a rain gutter to drain raindrops entering from above, and that the hydraulic oil tank is configured to also serve as a third partition plate fixing support to which the third partition plate is fixed.

[0015] In addition, it is preferable that the upper body is configured to be rotatable relative to the lower body and has a counterweight provided at the rear for balancing the vehicle body during operation (e.g., during excavation), the counterweight having a lower end fixed to the base frame and an upper end fixed to the first stay and the second stay.

[0016] It is also preferable that the upper body has a second partition plate that separates the first equipment room and the cockpit, the second partition plate having a lower end fixed to the base frame, and the first partition plate having a lower end fixed to the second partition plate.

[0017] It is also preferable that the base frame has a plurality of partition plate mounting bases for mounting the second partition plate, and at least one of the partition plate mounting bases is formed separately from the base frame and fixed to the base frame.

[0018] It is also preferable that the counterweight has an overlapping portion where a front end portion of a side wall of the counterweight fits inside a rear end portion of a side wall of the base frame. Effect of the Invention

[0019] According to the present invention, when assembling the multiple parts that make up the exterior of the upper body, the positioning and assembly of each part can be performed easily and with high precision without being greatly affected by the experience or technical ability of the worker, and a work vehicle can be realized that can be finished with a beautiful appearance with equal gaps between each assembled part. [Brief description of the drawings]

[0020] [Figure 1] FIG. 1 is a front perspective view showing an example of a work vehicle according to an embodiment of the present invention. [Diagram 2] FIG. 2 is a rear perspective view showing an example of a work vehicle according to an embodiment of the present invention. [Diagram 3] 3 is a perspective view of an upper body of the work vehicle shown in FIG. 1. FIG. [Figure 4] FIG. 4 is a perspective view of the upper body shown in FIG. 3 with the first cover and the second cover open. [Diagram 5] 5 is a perspective view of an upper body of the work vehicle shown in FIG. 2. FIG. [Figure 6] FIG. 6 is a perspective view of the upper body shown in FIG. 5 with the first cover and the second cover open. [Figure 7] FIG. 7 is a perspective view of the inside of the upper body shown in FIG. [Figure 8] FIG. 8 is an enlarged view of the base frame of the upper body shown in FIG. [Figure 9] FIG. 9 is a perspective view of the inside of the upper body shown in FIG. [Figure 10] FIG. 10 is an enlarged view of the base frame of the upper body shown in FIG. [Figure 11] 11A and 11B are side and enlarged views of the base frame and the counterweight. [Figure 12] 12 is a perspective view of an upper body of the work vehicle shown in FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0021] Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. Fig. 1 is a schematic diagram (perspective view from above the right front) showing an example of a work vehicle 1 according to this embodiment. Fig. 2 is a schematic diagram (perspective view from above the right rear) showing an example of a work vehicle 1. For ease of explanation, arrows may be used in the drawings to indicate up / down, left / right, and front / rear directions. In addition, in all drawings used to explain the embodiment, members having the same functions are given the same reference numerals, and repeated explanations thereof may be omitted.

[0022] First, an explanation will be given of the overall configuration of the work vehicle 1. An excavator will be taken as an example of the work vehicle 1. However, the work vehicle 1 is not limited to an excavator.

[0023] As shown in Fig. 1, the work vehicle 1 is equipped with a lower body 2 to which a traveling device 10 is attached. The work vehicle 1 is equipped with an upper body 3 which is disposed on the lower body 2 so as to be rotatable via a slewing bearing (not shown). The upper body 3 is driven (rotated) by a slewing hydraulic motor (not shown). The work vehicle 1 is equipped with working devices 12, 14 which are attached to the lower body 2 and the upper body 3 and which are operated by hydraulic pressure (hydraulic oil at a predetermined pressure).

[0024] The upper body 3 is provided with a cockpit (cabin or canopy) 15 at the front where an operator rides and operates the vehicle for traveling and work. The upper body 3 is provided with a control device (not shown) that controls the traveling device 10 and the work devices 12, 14 in response to the operation of the operator. The detailed configuration of the upper body 3 will be described later.

[0025] An example of the traveling device 10 includes four traveling wheels 58, two at the front and two at the back. The traveling wheels 58 have tires 58B fitted onto the outer periphery of wheels 58A (there are both single and double types). However, the traveling device 10 is not limited to the traveling wheels 58. As a modified example, the work vehicle 1 may be configured to include caterpillars (crawlers) instead of the traveling wheels 58 (not shown). The traveling wheels 58 are driven (traveled) by a traveling hydraulic motor (not shown).

[0026] An example of the working device 12 is equipped with a blade 28. The blade 28 is attached to the lower body 2 so as to be swingable up and down (including front and rear components). The blade 28 is driven by a hydraulic cylinder 38. However, the working device 12 is not limited to the above configuration.

[0027] Examples of the working device 14 include a boom 42, an arm 44, and an attachment (a bucket in this embodiment) 46. However, the attachment 46 is not limited to the bucket. The boom 42 is attached to the upper body 3 so as to be swingable up and down (including the front-rear component). However, the boom 42 is not limited to the above configuration. In this embodiment, a boom bracket 48 is provided between the upper body 3 and the boom 42. The boom bracket 48 allows the boom 42 to swing left and right (including the front-rear component) with respect to the upper body 3. Note that the boom bracket 48 may be omitted. The arm 44 is attached to the boom 42 so as to be swingable up and down (including the front-rear component). The attachment 46 is attached to the arm 44 so as to be swingable up and down (including the front-rear component). The boom 42 is driven by a hydraulic cylinder 52. The arm 44 is driven by a hydraulic cylinder 54. The attachment 46 is driven by a hydraulic cylinder 56. However, the working device 14 is not limited to the above configuration.

[0028] Here, the boom bracket 48 has a reinforcing plate 49 fixed (welded in this embodiment) to its underside (see FIG. 12). The reinforcing plate 49 is made of a metal plate and is formed in a convex shape (a convex shape with a gentle curve) with a central portion in the left-right direction that is convex from the rear to the front. Another reinforcing plate examined as a comparative example in the course of research and development was made of a metal plate and was formed in a concave shape with a central portion in the left-right direction that is concave from the front to the rear (not shown). As a result of finite element analysis, it was found that the reinforcing plate according to this comparative example has a problem that stress is likely to concentrate at a position directly below the vertical rib 17, which is also a support member of the boom bracket 48. In response to this problem, an analysis result was obtained that the configuration of the reinforcing plate 49 according to this embodiment can reduce the concentration of stress. That is, it is possible to enhance the reinforcing effect of the boom bracket 48 compared to the reinforcing plate according to the comparative example.

[0029] Next, the mechanism for driving the aforementioned swing hydraulic motor, traveling hydraulic motor, and each hydraulic cylinder is composed of, for example, a hydraulic pump driven by a drive source, a control valve, and the like (all not shown). The control valve is operated in response to the operation of the operator, and control is performed to supply hydraulic oil at a predetermined pressure delivered from the hydraulic pump to the swing hydraulic motor, traveling hydraulic motor, and each hydraulic cylinder. This allows the upper body 3 to swing, the traveling device 10 to travel, and the working devices 12, 14 to work.

[0030] In this embodiment, the work vehicle 1 is equipped with an engine (not shown) as a drive source. However, the drive source is not limited to an engine. As a modified example, the work vehicle 1 may be configured to include a battery-powered electric motor (not shown) instead of or in addition to the engine.

[0031] It should be noted that other mechanisms for travel and work in the work vehicle 1 according to this embodiment are similar to those of known work vehicles (excavators), and therefore detailed description will be omitted.

[0032] Next, the configuration of the upper body 3 will be described in detail (see Figs. 3 to 11). The upper body 3 is provided with a base frame 16 at its lower part, which is a strength member and a support member for the mounted equipment. The upper body 3 is provided with a hydraulic oil tank 23 that is attached to the base frame 16 and stores hydraulic oil. The upper body 3 is provided with a counterweight 18 at its rear part, which stabilizes the rotational movement of the upper body 3. The base frame 16 is integrally formed by welding beams and plates processed into a predetermined shape.

[0033] The upper body 3 is provided with a first equipment chamber 21 in which a drive source is housed at the rear. The upper body 3 is provided with a first cover 31 that covers the upper part of the first equipment chamber 21. The upper body 3 is provided with a first stay 33A and a second stay 33B that support the first cover 31 so that it can be opened and closed (or detached). As an example, the first stay 33A is provided with a pivot link 33Aa and a gas spring 33Ab. As an example, the second stay 33B is provided with a pivot link 33Ba and a gas spring 33Bb. However, the above configuration is not limited to this.

[0034] As described above, in the manufacturing process of the work vehicle 1, at least the base frame 16, the counterweight 18, and a plurality of covers (a first cover 31 and a second cover 32 described later) are assembled as exterior parts constituting the exterior of the upper body 3. However, since there are a plurality of parts to be assembled, and each of them has a complex three-dimensional shape and includes dimensional errors (tolerances), there is a problem that the parts cannot be assembled as designed, or even if they can be assembled, the width of the gaps formed at the boundaries between the exterior parts is not uniform, which is likely to cause problems. Therefore, the above assembly work is not only time-consuming and laborious, but also requires proficiency, i.e., advanced technical ability based on the experience and intuition of the worker, in order to finish the exterior appearance beautifully so that the gaps between the exterior parts are uniform.

[0035] In order to solve the above problems, the work vehicle 1 according to this embodiment has the following configuration.

[0036] The hydraulic oil tank 23 is configured to also serve as a first stay fixing column to which the first stay 33A is fixed.

[0037] In this embodiment, the hydraulic tank 23 can be accurately positioned at a reference position (a predetermined position in the design) by taking into consideration the tolerance of the hydraulic tank 23 and the base frame 16 (for example, by measuring the dimensions of the actual object and then adjusting them). In this way, a configuration is realized in which the hydraulic tank 23 arranged on the base frame 16 is also used as a support for fixing a part for mounting another exterior part of the upper body 3. Therefore, it is possible to easily and accurately position and assemble the part (first stay 33A) for mounting the exterior part (first cover 31) of the upper body 3. Furthermore, since there is no need to provide a support as a dedicated part for fixing the first stay 33A, it is possible to reduce the number of parts, thereby reducing costs and simplifying the assembly process. In addition, the shape accuracy (dimensional accuracy, processing accuracy, welding accuracy, etc.) of the hydraulic tank 23 is generally formed with higher accuracy than the shape accuracy (dimensional accuracy, processing accuracy, welding accuracy, etc.) of the base frame 16.

[0038] Next, the upper body 3 is provided with a first partition plate 61 that separates the first equipment room 21 from the cockpit 15 (including the area in the case where a space for accommodating equipment is provided behind the cockpit 15). The second stay 33B is fixed to the first partition plate 61. The hydraulic oil tank 23 is configured to also function as a first partition plate fixing support to which a part (side end portion 61b) of the first partition plate 61 is fixed.

[0039] According to the above configuration, the first stay 33A and the second stay 33B can be positioned using the hydraulic oil tank 23 arranged on the base frame 16 as a common reference. Therefore, the positioning and assembly of the first cover 31 supported by the first stay 33A and the second stay 33B can be performed easily and with high accuracy. In other words, the assembly of the first cover 31 to the base frame 16 can be performed easily and with high accuracy. In addition, since there is no need to provide a support pillar as a dedicated part for fixing the first partition plate 61, the number of parts can be reduced, which leads to cost reduction and simplification of the assembly process.

[0040] Next, the base frame 16 is provided with a plurality of tank mounting pedestals 24A, 24B for mounting the hydraulic oil tank 23. At least one (or all) of the plurality of tank mounting pedestals 24A, 24B is formed separately from the base frame 16. The separate tank mounting pedestals 24A, 24B are positioned and fixed at predetermined positions on the base frame 16 in a state where the base frame 16 is assembled by welding. As a definition of the term, "separate" refers to a state where the tank mounting pedestal is not provided in advance on the members to be welded in a state before the base frame 16 is assembled by welding. As an antonym, "integral" refers to a state where the tank mounting pedestal is provided in advance on the members to be welded in a state before the base frame 16 is assembled by welding.

[0041] The hydraulic oil tank 23 is attached to the base frame 16 by being fixed to a plurality of tank mounting bases 24A, 24B on the base frame 16. As an example, the tank mounting base 24A has two mounting holes (screw holes) 24Aa, 24Ab. The tank mounting base 24B has two mounting holes (screw holes) 24Ba, 24Bb.

[0042] The base frame 16 is distorted when assembled by welding. Therefore, if the entire tank mounting base is provided in advance on the member to be welded (i.e., formed "integrally"), the position of the tank mounting base will be shifted from the designed position when the base frame 16 is assembled. However, according to the configuration of this embodiment, the separate tank mounting bases 24A, 24B can be fixed in a state where the base frame 16 is assembled by welding (after assembly). When fixing the separate tank mounting bases 24A, 24B to the base frame 16, the fixing positions of the separate tank mounting bases 24A, 24B can be adjusted so that the hydraulic oil tank 23 is positioned at an accurate position on the base frame 16 and is in an accurate upright state. Therefore, when mounting the hydraulic oil tank 23 to the base frame 16, both the positioning accuracy and the tilt accuracy (uprightness) in the front-rear and left-right directions can be improved. The effectiveness of using the hydraulic oil tank 23 as a position reference can be further improved.

[0043] Next, the upper body 3 is provided with a second equipment chamber 22 in which a hydraulic pump (not shown) and the like are housed at a position adjacent to the first equipment chamber 21 (on the front right side of the first equipment chamber 21). The upper body 3 is provided with a second cover 32 that covers the upper part of the second equipment chamber 22. The upper body 3 is provided with a third stay 34A that supports the second cover 32 so that it can be opened and closed (or detached). As an example, one end of two hinges (not shown) is fixed (for example, bolted) to the third stay 34A, and the other end of the hinge is fixed (for example, welded) to the second cover 32, thereby making it possible to open and close the second cover 32. Note that, as a modified example, a configuration including two stays similar to the first stay 33A and the second stay 33B may be used (not shown).

[0044] However, the number and locations of the equipment rooms are not limited to the above configuration.

[0045] The hydraulic oil tank 23 is configured to also serve as a third stay fixing pillar to which the third stay 34A is fixed.

[0046] According to the above configuration, even when the first cover 31 and the second cover 32 are provided to cover two adjacent equipment compartments (the first equipment compartment 21 and the second equipment compartment 22), respectively, the stays (the first stay 33A and the second stay 33B) for attaching the first cover 31 and the stays (the third stay 34A) for attaching the second cover 32 can both be positioned using the hydraulic oil tank 23 arranged on the base frame 16 as a common reference. Therefore, the positioning and assembly of the first cover 31 and the second cover 32 can be performed easily and with high accuracy. In particular, the width of the gap formed at the boundary between the first cover 31 and the second cover 32 can be made uniform easily and with high accuracy, so that a work vehicle 1 with a beautiful appearance can be realized. In addition, since there is no need to provide a support as a dedicated part for fixing the third stay 34A, the number of parts can be reduced.

[0047] Next, the upper body 3 is provided with a third partition plate 65 which is provided below the gap formed at the boundary between the first cover 31 and the second cover 32 and has a rain gutter 63 attached thereto to drain raindrops that enter from above.

[0048] The hydraulic oil tank 23 is configured to also function as a third partition plate fixing support to which the third partition plate 65 is fixed.

[0049] The first cover 31 and the second cover 32 are positioned and assembled with high precision using the hydraulic oil tank 23 arranged on the base frame 16 as a common reference. According to the above configuration, the third partition plate 65 to which the rain gutter 63 is attached, which drains raindrops that infiltrate through a gap formed at the boundary between the first cover 31 and the second cover 32, can be positioned together with the first cover 31 and the second cover 32 using the hydraulic oil tank 23 as a common reference. Therefore, the third partition plate 65 to which the rain gutter 63 is attached can be positioned at a predetermined position below the gap with high precision, and raindrops can be reliably drained.

[0050] Next, the counterweight 18 has a lower end fixed (connected) to the base frame 16, and an upper end fixed (connected) to the first stay 33A and the second stay 33B. Similar to the hydraulic oil tank 23, the counterweight 18 is positioned and fixed to a predetermined position on the base frame 16 using a plurality of mounting bases (not shown) in a state where the base frame 16 is assembled by welding.

[0051] According to the above configuration, it is possible to improve both the positioning accuracy and the tilt accuracy (uprightness) in the front-rear and left-right directions when attaching the counterweight 18 to the base frame 16. Therefore, the first stay 33A and the second stay 33B can be reliably connected to the targeted position (predetermined position in design) of the counterweight 18.

[0052] When a counterweight 18 is provided in addition to the first cover 31 and the second cover 32 that respectively cover two adjacent equipment compartments (the first equipment compartment 21 and the second equipment compartment 22), it is necessary to position and assemble four exterior parts including the base frame 16, which is a task that requires particular skill. However, according to the configuration of this embodiment, the positioning and assembly of the first cover 31, the second cover 32, and the counterweight 18 to the base frame 16 can be performed easily and with high precision.

[0053] In particular, the width of the gaps formed at the boundaries between adjacent parts in the four exterior parts can be made equal easily and with high precision, resulting in a beautiful-looking work vehicle 1. Furthermore, when attaching the counterweight 18 to the base frame 16, a step of adjusting the inclination using a shim was conventionally required, but this step can be omitted to improve efficiency.

[0054] Next, the upper body 3 is provided with a second partition plate 62 that separates the first equipment room 21 from the cockpit 15 (or the equipment room on the cockpit 15 side). The second partition plate 62 has a lower end portion 62a fixed to the base frame 16. The first partition plate 61 described above has a lower end portion 61a fixed to the second partition plate 62.

[0055] According to the above configuration, the partition plate that separates the first equipment room 21 from the cockpit 15 (or the equipment room on the cockpit 15 side) can be made into a divided structure consisting of multiple plates (i.e., the first partition plate 61 and the second partition plate 62). Therefore, during maintenance, it is only necessary to remove the partition plate in the necessary location, improving workability.

[0056] Next, the base frame 16 is provided with a plurality of partition plate mounting bases 64A, 64B, 64C for mounting the second partition plate 62. At least one (or all) of the partition plate mounting bases 64A, 64B, 64C is formed separately from the base frame 16. The separate partition plate mounting bases 64A, 64B, 64C are positioned and fixed at predetermined positions on the base frame 16 when the base frame 16 is assembled by welding. As a definition of the term, "separate" refers to a state in which the partition plate mounting base is not provided in advance on the members to be welded before the base frame 16 is assembled by welding. As an antonym, "integral" refers to a state in which the partition plate mounting base is provided in advance on the members to be welded before the base frame 16 is assembled by welding.

[0057] The second partition plate 62 is attached to the base frame 16 by being fixed to a plurality of partition plate mounting bases 64A, 64B, 64C on the base frame 16. As an example, the partition plate mounting base 64A has one mounting hole (screw hole) 64Aa. The partition plate mounting base 64B has four mounting holes (screw holes) 64Ba, 64Bb, 64Bc, 64Bd. The partition plate mounting base 64C has one mounting hole (screw hole) 64Ca.

[0058] The base frame 16 is distorted when assembled by welding. Therefore, if the entire partition plate mounting base is provided in advance on the member to be welded (i.e., if it is formed "integrally"), the position of the partition plate mounting base will be shifted from the designed position when the base frame 16 is assembled. However, according to the configuration of this embodiment, the separate partition plate mounting bases 64A, 64B, 64C can be fixed in a state in which the base frame 16 is assembled by welding (after assembly). When the separate partition plate mounting bases 64A, 64B, 64C are fixed to the base frame 16, the fixing positions of the separate partition plate mounting bases 64A, 64B, 64C can be adjusted so that the second partition plate 62 is positioned at an accurate position on the base frame 16 and is in an accurate upright state. Therefore, when the second partition plate 62 is attached to the base frame 16, both the positioning accuracy and the tilt accuracy in the front-rear and left-right directions (uprightness) can be improved.

[0059] Next, the counterweight 18 has an overlapping portion 18A where the side wall front end portion 18a fits inside the side wall rear end portion 16a of the base frame 16. Figure 11 is a schematic diagram showing the base frame 16 and the counterweight 18 of the work vehicle 1, where Figure 11A is a side view and Figure 11B is an enlarged perspective view.

[0060] In conventional work vehicles, the gap formed at the boundary between the counterweight 18 and the base frame 16 is difficult to position and assemble so as to have a uniform width among the exterior components of the upper body 3, and is a location where unevenness in width is easily noticeable. However, with the above configuration, even if the width of the gap at the boundary between the counterweight 18 and the base frame 16 becomes uneven, the presence of the overlapping portion 18A can provide a visual effect that makes the unevenness less noticeable.

[0061] As described above, with the above-mentioned work vehicle, when assembling the multiple parts that make up the exterior of the upper body, the positioning and assembly of each part can be performed easily and with high precision without being greatly affected by the experience or technical ability of the worker, and a work vehicle can be realized that can be finished with a beautiful appearance with equal gaps between each assembled part.

[0062] According to the above-described work vehicle, it is possible to reduce the number of parts, thereby reducing costs and simplifying the assembly process.

[0063] The present invention is not limited to the above embodiment (excavator). The present invention can be applied to a work vehicle with a rotating upper body (crane, aerial work vehicle, etc.). The present invention can be applied to a work vehicle with a non-rotating upper body (loader, carrier, etc.). [Explanation of symbols]

[0064] 1. Work vehicles 2 Lower body 3. Upper body 10 Running gear 12, 14 Working equipment 15 Cockpit 16 Base Frame 18 Counterweight 18A Overlap 21 1st equipment room 22 2nd equipment room 23 Hydraulic Oil Tank 24A, 24B Tank mounting base 31 First Cover 32 2nd Cover 33A 1st Stay 33B 2nd Stay 61 First partition 62 Second partition plate 63 Rain gutter 64A, 64B, 64C Partition plate mounting base 65 Third partition plate

Claims

1. A work vehicle comprising a lower body to which a traveling device is attached, an upper body disposed on the lower body, a working device attached to the lower body or the upper body and operated by hydraulic pressure of hydraulic oil, and a control room for operating the traveling device and the working device, the upper body has a base frame provided at a lower portion, a first equipment chamber provided at a rear portion, a first cover covering an upper portion of the first equipment chamber, a first stay supporting the first cover in an openable / closable or detachable manner, and a hydraulic oil tank attached to the base frame and storing the hydraulic oil, The hydraulic oil tank is configured to be used also as a first stay fixing column to which the first stay is fixed. A work vehicle characterized by:

2. The upper body has a first partition plate that separates the first equipment room and the cockpit, and a second stay that supports the first cover together with the first stay so that the first cover can be opened and closed or detached, The first partition plate has the second stay fixed thereto, The hydraulic oil tank is configured to also serve as a first partition plate fixing support to which a part of the first partition plate is fixed.

2. The work vehicle according to claim 1,

3. The base frame has a plurality of tank mounting bases for mounting the hydraulic oil tank, At least one of the tank mounting bases is formed separately from the base frame and fixed to the base frame.

3. The work vehicle according to claim 1 or 2, characterized in that

4. the upper body includes a second equipment chamber provided adjacent to the first equipment chamber, a second cover that covers an upper portion of the second equipment chamber, and a third stay that supports the second cover in an openable / closable or detachable manner, The hydraulic oil tank is configured to be used also as a third stay fixing column to which the third stay is fixed.

4. The work vehicle according to claim 3,

5. The upper body has a third partition plate provided below the gap formed at the boundary between the first cover and the second cover and having a rain gutter attached thereto for draining raindrops entering from above, and the hydraulic oil tank is configured to also serve as a third partition plate fixing support to which the third partition plate is fixed.

5. The work vehicle according to claim 4,

6. The upper body is configured to be rotatable relative to the lower body and has a counterweight provided at the rear to balance the upper body during rotation. The counterweight has a lower end fixed to the base frame and an upper end fixed to the first stay and the second stay.

3. The work vehicle according to claim 2,

7. The upper body has a second partition plate that separates the first equipment room from the cockpit or an equipment room on the cockpit side, The second partition plate has a lower end portion fixed to the base frame, The first partition plate has a lower end fixed to the second partition plate.

7. The work vehicle according to claim 2 or 6,

8. the base frame has a plurality of partition plate mounting bases for mounting the second partition plate, At least one of the partition plate mounting bases is formed separately from the base frame and fixed to the base frame.

8. The work vehicle according to claim 7,

9. The counterweight has an overlapping portion where a front end of a side wall of the counterweight is inserted into an inside of a rear end of a side wall of the base frame.

7. The work vehicle according to claim 6,

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