Work vehicle

Abstract

To provide a work vehicle capable of improving the ease of attaching and detaching a battery.SOLUTION: A work vehicle 1 includes a vehicle body 3, a traveling device 10, and working devices 12, 14 that are hydraulically operated. The vehicle body 3 includes a main body frame 18 and a battery mounting section 62 on which a starting battery 60 is detachably mounted. The battery mounting section 62 includes a bracket 64 that is fixed to the main body frame 18 and supports the battery 60, and a catch 80 that fixes the battery 60 to the bracket 64. The bracket 64 includes a flat plate section 66 on which the battery 60 is placed, and a locking section 68 to which the catch 80 is locked. The locking section 68 includes a locking projection 70 on the underside of the flat plate section 66. The catch 80 includes a locking groove section 96 at its lower end that locks with the locking projection 70.SELECTED DRAWING: Figure 3

Description

[Technical field]

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

[0002] Conventionally known examples of working vehicles include hydraulic excavators and track loaders, which are equipped with a lower body to which crawlers or tires 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 by hydraulic pressure (i.e., hydraulic oil at a predetermined pressure).

[0003] The above-mentioned work vehicles are equipped with an engine starting device, electrical equipment such as an air conditioner that adjusts the temperature in the cab, and a battery that supplies power to the control controllers of each device (see Patent Document 1: JP 2018-162610 A). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2018-162610 A Summary of the Invention [Problem to be solved by the invention]

[0005] As an example, Patent Document 1 discloses a structure for mounting a battery on a vehicle body. Specifically, a clamp member is provided at an upper corner of a battery mounted on a bracket, and one end of the clamp member is connected to a locking portion formed on a front wall of the bracket with a hook bolt, and the other end of the clamp member is connected to a locking portion formed on a rear wall of the bracket with a hook bolt, thereby clamping and fixing the battery. However, in this configuration, the locking portion is formed so as to protrude upward from the front wall of the bracket, and there is a problem that the locking portion interferes when attaching and detaching the battery, making it difficult to work. [Means for solving the problem]

[0006] The present invention has been made in consideration of the above circumstances, and has an object to provide a work vehicle that can improve the ease of attaching and detaching a battery.

[0007] The present invention solves the above problems by the solution means described below as one embodiment.

[0008] A work vehicle according to one embodiment is a work vehicle comprising a vehicle body, a traveling device, and a hydraulically operated working device, wherein the vehicle body comprises a main frame and a battery mounting section in which a starting battery is removably mounted, the battery mounting section having a bracket fixed to the main frame and supporting the battery, and a catch for fixing the battery to the bracket, the bracket having a flat plate portion on which the battery is placed and a locking portion for locking the catch, the locking portion having a locking protrusion on the underside of the flat plate portion, and the catch having a locking groove portion at its lower end for locking with the locking protrusion.

[0009] According to the above-mentioned configuration, the battery can be fixed in the area in the direction of attachment and detachment of the battery without providing any member that protrudes upward, thereby improving the ease of attachment and detachment of the battery.

[0010] It is also preferable that the locking protrusion is a rod-shaped member whose axis is parallel to the plate surface of the flat plate portion, and that the locking groove portion is formed with a J-shaped cross section with the axis of the locking groove parallel to the axis of the locking protrusion.

[0011] Furthermore, it is preferable that, when viewed in a plane, the locking portion has a first notch cut out from the outer periphery and a second notch further cut out from the bottom of the first notch, and that the second notch is formed with a width that allows the locking groove portion to fit into.

[0012] Furthermore, it is preferable that the first end of the locking projection is arranged in the axial direction at a position such that the first end is outer than the first end of the first notch and the first end of the second notch, and the second end is inner than the second end of the first notch and outer than the second end of the second notch, and that the distance from the second end of the locking projection to the second end of the first notch is wider than the width of the locking groove portion.

[0013] It is also preferable that at least a lower half of the rod-shaped member is formed in a circular shape in cross section.

[0014] It is also preferable that a weld bead wider than the outer diameter of the engaging projection is formed on both ends of the engaging projection. Effect of the Invention

[0015] According to the work vehicle according to one embodiment, the ease of attaching and detaching the battery can be improved. [Brief description of the drawings]

[0016] [Figure 1] FIG. 1 is a perspective view showing an example of a work vehicle according to an embodiment of the present invention. [Diagram 2] FIG. 2 is a perspective view showing an example of a cab of the work vehicle of FIG. [Diagram 3] Fig. 3A is a perspective view showing an example of a battery mounting unit of the work vehicle of Fig. 1. Fig. 3B is a perspective view of the battery mounting unit shown in Fig. 3A from another direction. Fig. 3C is a perspective view of the battery mounting unit shown in Fig. 3A from yet another direction. [Figure 4] FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. 3A. [Diagram 5] FIG. 5 is a bottom view of the bracket. [Figure 6] FIG. 6 is an enlarged view of a portion VI in FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0017] 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 left front) showing an example of a work vehicle 1 according to this embodiment. For convenience of explanation, arrows may be used in the drawings to indicate up / down, left / right, and front / rear directions. In addition, in all drawings for explaining the embodiment, members having the same function are given the same reference numerals, and repeated explanations thereof may be omitted.

[0018] First, a description will be given of the overall configuration of the work vehicle 1. A hydraulic excavator will be taken as an example of the work vehicle 1. However, the work vehicle 1 is not limited to a hydraulic excavator.

[0019] As shown in FIG. 1, a work vehicle 1 includes a vehicle body including a lower body 2 and an upper body 3 disposed on the lower body 2 (note that the lower body 2 and the upper body 3 may be integrally configured).

[0020] The work vehicle 1 is equipped with working devices 12, 14 that are attached to the lower body 2 and upper body 3 and are operated by hydraulic pressure (hydraulic oil at a specified pressure). The lower body 2 is equipped with a traveling device 10 for traveling. The upper body 3 is equipped with a main body frame 18 at its lower part. The upper body 3 is equipped with a driver's cab 16 at the front where an operator sits and is provided with various operating devices for operating the vehicle and performing work.

[0021] An example of the traveling device 10 includes a pair of left and right crawlers 26. However, the traveling device 10 is not limited to the crawlers 26, and may include tires (not shown) instead of the crawlers 26. The crawlers 26 are driven (travel) by a traveling hydraulic motor 28.

[0022] An example of the working device 12 includes a blade 22. The blade 22 is attached to the lower body 2 so as to be swingable up and down (including forward and backward). The blade 22 is driven by a hydraulic cylinder (blade cylinder) 32. However, the present invention is not limited to the above configuration.

[0023] An example of the working device 14 includes a boom 42, an arm 44, and a detachable attachment 46. As a specific configuration, the boom 42 is attached to the upper body 3 so as to be swingable up and down (including front and rear components). 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 front and rear components) 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 front and rear components). The attachment 46 is attached to the arm 44 so as to be swingable up and down (including front and rear components). The boom 42 is driven by a hydraulic cylinder (boom cylinder) 52. The arm 44 is driven by a hydraulic cylinder (arm cylinder) 54. The attachment 46 is driven by a hydraulic cylinder (bucket cylinder) 56. However, the configuration is not limited to the above.

[0024] The drive mechanism for driving the traveling hydraulic motor 28 and each hydraulic cylinder is, for example, composed of a hydraulic pump (main hydraulic pump, etc.) driven by a drive source, a control valve, etc. (none of which are shown). An operator operates a predetermined operating device to actuate the control valve, thereby controlling the supply of hydraulic oil at a predetermined pressure delivered from the hydraulic pump to the traveling hydraulic motor 28 and each hydraulic cylinder. This allows the traveling device 10 to travel, and the working devices 12, 14 to work. One or more hydraulic pumps that constitute the drive mechanism are provided depending on the configuration and load of the working devices 12, 14 and the traveling device 10.

[0025] The work vehicle 1 is equipped with an engine (an internal combustion engine that burns fuel) as the drive source. Note that as another example of the drive source, instead of or together with the engine, a configuration may be provided in which an electric motor (one or more depending on the number of hydraulic pumps, rated output, etc.) is provided (not shown).

[0026] 2, in the work vehicle 1 according to this embodiment, an equipment compartment 36 is provided below the seat 34 on which the operator sits, and a battery 60 is housed in the equipment compartment 36. The battery 60 supplies power for starting the work vehicle 1 (it is not limited to being used exclusively for starting the work vehicle 1, but is intended to be used at least for starting the work vehicle 1).

[0027] The battery 60 is mounted on a battery mounting section 62 located at the front position when the door 38 of the equipment compartment 36 is open. Here, Figs. 3A to 3C are perspective views of the battery mounting section 62 viewed from different directions. Fig. 4 is a cross-sectional view taken along line IV-IV in Fig. 3A. The battery mounting section 62 includes a bracket 64 fixed to the main body frame 18 to support the battery 60, and a catch 80 for fixing the battery 60 to the bracket 64. The members constituting the bracket 64 and the catch 80 are both formed using a metal material (for example, a steel material such as SPHC).

[0028] The bracket 64 has a flat plate portion 66 on which the battery 60 is placed, and a locking portion 68 to which the catch 80 is locked. The locking portion 68 has a locking projection 70 on the underside of the flat plate portion 66. The locking projection 70 is a rod-shaped member whose axis is parallel to the plate surface of the flat plate portion 66. Here, in conventional work vehicles, the locking portion is provided by welding a metal plate with a locking hole or a U-shaped metal fitting or the like to the bracket. Therefore, by employing a rod-shaped member as the locking projection 70, the number of manufacturing processes for the part can be reduced.

[0029] The catch 80 has a first catch 82, a second catch 92, and a connecting member 100 that connects the first catch 82 and the second catch 92 together.

[0030] The first catch 82 is formed by bending a single metal plate. The first catch 82 has an abutment portion 84 that abuts against the rear upper surface of the battery 60, a locking groove portion 86 with a J-shaped cross section that extends obliquely upward from the rear end of the abutment portion 84, and a connecting member engagement portion 88 that extends upward at a substantially right angle from the front end of the abutment portion 84. A rubber plate 84A that absorbs vibrations of the battery 60 is provided on the abutment portion 84. An insertion hole 88a through which the connecting member 100 is inserted is formed on the connecting member engagement portion 88.

[0031] The second catch 92 is formed by bending a single metal plate. The second catch 92 has an abutment portion 94 that abuts against the front surface and the front upper surface of the battery 60, a locking groove portion 96 with a J-shaped cross section extending from the lower end of the abutment portion 94, and a connecting member engaging portion 98 that extends upward at a substantially right angle from the rear end of the abutment portion 94. A rubber plate 94A that isolates the battery 60 is provided on the abutment portion 94. The locking groove portion 96 is provided such that the axis of the locking groove 96a is parallel to the locking protrusion 70. The connecting member engaging portion 98 has an insertion hole 98a through which the connecting member 100 is inserted.

[0032] The connecting member 100 is, for example, a bolt 100A and a nut 100B. The bolt 100A is inserted through the insertion holes 88a, 98a and the nut 100B is screwed into the insertion holes 88a, 98a.

[0033] In the battery mounting section 62 according to this embodiment, when the locking groove 86 of the first catch 82 is locked to the locking portion 106 welded to the front wall 104 of the air conditioner compartment 102 disposed at the rear side of the equipment compartment 36 and the locking groove 96 of the second catch 92 is locked to the locking projection 70 of the bracket 64, the bolts 100A are inserted into the insertion holes 88a, 98a and the nuts 100B are screwed and tightened, so that the abutting portions 84, 94 clamp the battery 60 from above and from the front to fix the battery 60. This allows the battery 60 to be fixed to the bracket 64 without providing any member protruding upward in the region in the mounting and removal direction of the battery 60. This improves the workability of mounting and removing the battery 60. Furthermore, by not providing any member protruding upward, the battery 60 can be prevented from interfering with the member and being damaged.

[0034] Here, the following problem was found when engaging and disengaging the second catch 92. Specifically, when the second catch 92 is moved downward to engage (disengage) the locking groove portion 96 with the locking projection 70, it may interfere with the mounted device (in this embodiment, a swing motor (not shown)) disposed below the bracket 64, and depending on the assembly tolerance, a situation may arise in which it becomes difficult to engage and disengage the second catch 92. To address this problem, the battery mounting portion 62 according to this embodiment has the following configuration.

[0035] 5 and 6, the locking portion 68 has a first notch 72 cut out from the outer periphery in a plan view, and a second notch 74 cut out from the bottom of the first notch 72, and the second notch 74 is formed with a width W1 into which the locking groove 96 can be fitted. In this embodiment, the width W1 (the distance from the first end 74a to the second end 74b) is formed slightly wider than the width of the locking groove 96. As a result, by further fitting the locking groove 96 into the second notch 74 while the locking protrusion 70 is engaged with the locking groove 96, the second catch 92 is prevented from shifting laterally, and the battery 60 can be firmly fixed.

[0036] Further, the locking projection 70 is disposed at a position in which the first end 70a is located outside the first end 72a of the first notch 72 and the first end 74a of the second notch 74 (in this embodiment, the first end 72a and the first end 74a are connected on the same line) in the axial direction, and the second end 70b is located inside the second end 72b of the first notch 72 and outside the second end 74b of the second notch 74, and the distance W2 from the second end 70b of the locking projection 70 to the second end 72b of the first notch 72 is formed wider than the width of the locking groove portion 96. According to this configuration, the following action and effect can be obtained. Specifically, the second catch 92 can be released from the second notch 74 by moving the upper part of the second catch 92 diagonally forward with the locking projection 70, to which the locking groove portion 96 is locked, as a rotation axis. In this state, the second catch 92 can be moved slightly downward and slid along the locking projection 70 toward the second end 72b of the first notch 72 to disengage the locking groove 96 from the locking projection 70, thereby removing the second catch 92. This minimizes the vertical movement of the second catch 92 when it is engaged or disengaged, and prevents it from interfering with the mounted equipment disposed below the bracket 64.

[0037] Furthermore, at least the lower half of the locking projection (rod-shaped member) 70 is formed in a circular shape in cross section. This prevents edge contact with the locking groove 96 and prevents a decrease in strength due to wear, rust, etc. Note that the "circular shape" here is a general term for a perfect circle, an ellipse (oval), etc.

[0038] Additionally, weld beads 76 that are wider than the outer diameter are formed on both ends 70a, 70b of the locking projection 70. This further prevents the second catch 92 from shifting laterally, enabling the battery 60 to be firmly fixed.

[0039] A process for removing the battery 60 mounted on the battery mounting section 62 in the work vehicle 1 described above will now be described.

[0040] First, the negative terminal 112 and the positive terminal 114 connected to the upper part of the battery 60 are removed. Next, the nut 100B of the connecting member 100 connecting the first catch 82 and the second catch 92 is removed. Next, the first catch 82 is moved backward and the front part of the first catch 82 is lifted obliquely upward to disengage the locking groove part 86 from the locking part 106 of the front wall part 104 of the air conditioner room 102, and the first catch 82 is removed (at this time, the bolt 100A of the connecting member 100 is also removed). Next, the upper part of the second catch 92 is moved obliquely forward to disengage the second catch 92 from the second notch 74. In this state, the second catch 92 is moved slightly downward and slid along the locking projection 70 toward the second end part 72b of the first notch 72 to disengage the locking groove part 96 from the locking projection 70, and the second catch 92 is removed. The order in which the first catch 82 and the second catch 92 are removed does not matter. Next, the battery 60 is pulled forward from the equipment compartment 36, thereby completing the removal of the battery 60. When installing the battery 60, the above steps can be carried out in reverse order.

[0041] As described above, according to the above-described work vehicle, the ease of attaching and detaching the battery can be improved.

[0042] The present invention is not limited to the above embodiment (hydraulic excavator), and can be similarly applied to a work vehicle (such as a track loader) in which the upper body does not rotate relative to the lower body. [Explanation of symbols]

[0043] 1. Work vehicles 10 Running gear 12, 14 Working equipment 60 Battery 62 Battery mounting area 64 Bracket 70 Locking protrusion 72 First notch 74 Second notch 80 Catch 82 First Catch 92 Second Catch 100 Connecting member

Claims

1. A work vehicle including a vehicle body, a traveling device, and a hydraulically operated working device, The vehicle body includes a main body frame and a battery mounting section in which a start-up battery is detachably mounted, the battery mounting portion includes a bracket fixed to the main body frame to support the battery, and a catch for fixing the battery to the bracket; the bracket has a flat plate portion on which the battery is placed and a locking portion to which the catch is locked, The locking portion has a locking projection on a lower surface side of the flat plate portion, The catch has a locking groove at a lower end thereof for locking with the locking projection. A work vehicle characterized by:

2. The locking projection is a rod-shaped member having an axis parallel to a plate surface of the flat plate portion, The locking groove is formed in a J-shaped cross section such that the axis of the locking groove is parallel to the axis of the locking projection.

2. The work vehicle according to claim 1,

3. The locking portion has, in a plan view, a first notch cut out from an outer periphery and a second notch cut out further from a bottom of the first notch, The second notch is formed to have a width that allows the engagement groove to be fitted therein.

3. The work vehicle according to claim 2,

4. the locking projection is disposed at a position such that, in the axial direction, a first end is located outside a first end of the first notch and a first end of the second notch, and a second end is located inside a second end of the first notch and outside a second end of the second notch, A distance from the second end of the locking projection to the second end of the first notch is formed wider than a width of the locking groove.

4. The work vehicle according to claim 3,

5. At least a lower half of the rod-shaped member is formed in a circular shape in cross section.

5. The work vehicle according to claim 4,

6. The locking projection has weld beads formed on both ends, the weld beads being wider than the outer diameter.

6. The work vehicle according to claim 5,

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