Hydraulic unit

Abstract

To provide a hydraulic unit that allows for easy loading and unloading of batteries. [Solution] A portable hydraulic unit comprising a frame 12, a hydraulic power source device including an engine, hydraulic pump, and battery 13 mounted on the frame, and a rectangular parallelepiped-shaped cover body 14 that conceals the hydraulic power source device from the outside, wherein the cover body has a door opening 42 that exposes the battery to the outside, a door that opens and closes the door opening, a lifting device 16 to which a manual lifting device 15 used when transporting the battery can be attached and detached, and a mounting part 46 provided on one side of the door frame 45 that forms the door opening to which the lifting device is attached, wherein the lifting device has an arm 50 provided with a lifting hole for attaching the lifting device, and a hinge 47 that supports the arm so as to be able to rotate horizontally, and the posture can be changed between a stored state where it is stored inside the cover body and an deployed state where it is deployed to the outside through the door opening by rotating the arm horizontally with the hinge attached to the mounting part as a pivot point.

Description

Technical Field

[0001] The present invention relates to a hydraulic unit, and more specifically to a hydraulic unit that generates hydraulic pressure as an external power source for construction machinery. Background Art

[0002] A portable hydraulic unit used as an external power source for construction machinery is known (see, for example, Patent Document 1). The hydraulic unit is formed as a rectangular parallelepiped (box shape) in which components such as an engine, a hydraulic pump, and a battery are mounted on a frame, and a cover body (also referred to as a house, a casing, etc.) with a soundproof structure is provided to cover these components. Prior Art Documents Patent Documents

[0003] Patent Document 1 Japanese Unexamined Patent Publication No. 2011-80438 Summary of the Invention Problems to be Solved by the Invention

[0004] In a hydraulic unit such as that described in Patent Document 1, normally, the position of the outer wall surface provided with the door corresponds to the transport width, and there is a limit to the size (accommodation dimension) of the cover body. Therefore, as the size of the constituent devices continues to increase, the layout requirements become correspondingly stricter. In particular, although a battery, which is treated as a regularly replaced part, is a heavy object, due to its arrangement, it cannot be lifted and transported by an overhead crane or the like, which poses a problem of greatly affecting workability during assembly and maintenance.

[0005] Accordingly, an object of the present invention is to provide a hydraulic unit that enables easy carrying-in and carrying-out of a battery. Means for Solving the Problems

[0006] To achieve the above objective, the present invention provides a portable hydraulic unit comprising a frame, a hydraulic power source device including an engine, a hydraulic pump, and a battery mounted on the frame, and a rectangular parallelepiped-shaped cover body that conceals the hydraulic power source device from the outside, wherein the frame has a bottom plate on which the battery is placed and a fixing device for fixing the battery in a fixed position on the bottom plate, and the cover body has a door opening that exposes the battery to the outside, a door for opening and closing the door opening, and a manual lifting device used when transporting the battery. The device comprises a detachable suspension device and a mounting portion provided on one side of the door frame forming the door opening to which the suspension device is attached. The suspension device comprises an arm provided with a suspension hole for attaching the suspension device and a hinge that supports the arm so as to be rotatable in the horizontal direction. The device is configured to change its orientation between a stored state, where it is housed inside the cover body, and an extended state, where it is deployed to the outside through the door opening, by rotating the arm horizontally with the hinge attached to the mounting portion as a pivot point.

[0007] Furthermore, the suspension device is characterized by being positioned so as not to overlap with the projection of the door opening when it is in the retracted state. It is also characterized by being equipped with a holding means for maintaining the suspension device in the retracted state.

[0008] Furthermore, the interior of the cover body is provided with an inner wall surface perpendicular to the door frame, and the retaining means is characterized by having a bracket provided on the inner wall surface and a retaining pin that can be inserted into and removed from pin holes that overlap vertically between the bracket and the arm. In addition, the inner wall surface is characterized by having a case for housing the hanging device.

[0009] In addition, the device is characterized by having a resin support member interposed between the battery and the bottom plate, and the battery consists of multiple units that are sequentially suspended and transported using the lifting device. [Effects of the Invention]

[0010] According to the hydraulic unit of the present invention, in a lifting device for lifting and transporting batteries, the arm can be rotated horizontally using a hinge as a pivot point, allowing the arm to be changed between a stored state where it is housed inside the cover and an extended state where it is deployed outside through the door opening. Therefore, when lifting and transporting batteries by adjusting the direction of the arm, a compact manual lifting device (e.g., a lever hoist) can be used. Moreover, when the battery is suspended, it is possible to cross over the door frame with a simple operation of just rotating the arm, reducing the effort and burden of manual lifting and transport. In other words, a hydraulic unit that allows for easy loading and unloading of batteries can be realized.

[0011] Furthermore, since the lifting device is positioned in a location that does not overlap with the projection of the door opening when it is retracted, access to various equipment located near the battery (e.g., the control box) is improved, making maintenance inside the cover body easier. In addition, a holding mechanism is provided to keep the lifting device in the retracted position, allowing for safe handling of the lifting device and contributing to the operation of a portable hydraulic unit.

[0012] Furthermore, since retaining pins are used as a simple means of holding, not only is handling improved, but it is also inexpensive and easy to manufacture. In addition, a case for storing the lifting device is provided on the inner wall surface of the cover body, so the lifting device can be stored compactly while maintaining integration with the stored lifting device.

[0013] In addition, because it is equipped with a resin support member (e.g., a resin plate) interposed between the battery and the base plate, the battery can slide smoothly on the base plate, and even if the configuration consists of multiple batteries, they can be easily placed in their designated positions with a simple operation of pushing or pulling each battery individually. In other words, when handling multiple batteries that share a common lifting route, this greatly contributes to reducing the workload and improving work efficiency during assembly and maintenance. [Brief explanation of the drawing]

[0014] [Figure 1] It is a perspective view of the hydraulic unit showing one embodiment of the present invention. [Figure 2] It is also an exploded perspective view of the essential portions thereof. [Figure 3] It is also a front view of the essential portions thereof. [Figure 4] It is a sectional view taken along line IV-IV in Figure 3. [Figure 5] It is a sectional view taken along line V-V in Figure 4. [Figure 6] It is an explanatory diagram showing a state where a battery is suspended by using a lifting tool on a lifting device. [Figure 7] It is a perspective view showing the stored state of the lifting device. [Figure 8] It is a perspective view showing the state after the stored holding of the lifting device is released. [Figure 9] It is a perspective view showing the deployed state of the lifting device. [Figure 10] It is an explanatory diagram showing a state where a first battery is lifted during battery carrying-in work. [Figure 11] It is an explanatory diagram showing a state where the first battery is suspended and conveyed and introduced into the cover body. [Figure 12] It is an explanatory diagram showing a state where a second battery is lifted.

Mode for Carrying Out the Invention

[0015] Figures 1 to 12 show one embodiment of the hydraulic unit of the present invention. As shown in Figures 1 and 2, the hydraulic unit 11 shown in the present embodiment forms a rectangular parallelepiped (box shape) with defined external dimensions in the longitudinal front-rear direction (X direction), the lateral short direction (Y direction), and the vertical direction (Z direction), and mainly includes: a frame 12; a hydraulic power source device configured by an engine mounted on the frame 12, a hydraulic pump driven by the engine, a hydraulic oil tank storing hydraulic oil, a battery 13 (Figures 3 to 5) and the like (components other than the battery 13 are not shown); a rectangular parallelepiped cover body 14 that conceals the hydraulic power source device from the outside; and a lifting device 16 to which a manual lifting tool 15 used when conveying the battery 13 is detachably attachable (Figure 6).

[0016] In the hydraulic unit 11 of the present embodiment, the suspending device 16 belongs to the configuration of the cover body 14, and is permanently provided inside the cover body 14 together with the sling 15 and its accessories for convenience (details will be described later). Further, as the sling 15, as shown in FIG. 6, a well-known lever hoist that can wind up and wind down a chain 15b by manually operating an operating lever 15a is used.

[0017] As shown in FIG. 2 and other drawings, the gantry 12 is formed by framing a steel material (channel) with a U-shaped cross section into a rectangular shape in plan view, and its strength and rigidity are enhanced by the same type of steel material provided to partition the inside of the frame. Further, at the corner of the gantry 12 at a position corresponding to the arrangement of the control panel 17, there are provided a bottom plate 18 on which the battery 13 is placed in a form recessed into the gantry 12, a fixing device 19 for fixing the battery 13 at a fixed position on the bottom plate 18 (FIGS. 3 to 5) (only the locking portion 26 is shown as a component in FIG. 2), and a pair of front and rear base plates 20, 21 for installing the control panel 17 on the upper surface of the frame body.

[0018] As shown in FIGS. 3 to 6, the battery 13 includes a first battery 13R and a second battery 13L that are sequentially suspended and conveyed using the sling 15. Each of the batteries 13R and 13L is a replaceable one of the same type and same shape (low-voltage type), and is respectively placed on a square-shaped tray 22. Further, in the fixed state of each of the batteries 13R and 13L, the battery main body (housing) has a rectangular parallelepiped shape elongated in the front-rear direction (the left-right direction in FIG. 5), and is placed side by side in the left-right direction (the up-down direction in FIG. 5). Resinous support members (for example, resin plates) 23 are attached to the four corners of the lower surface of the tray 22. Accordingly, the support member 23 is interposed between the battery 13 and the bottom plate 18 in a state attached to the battery 13 (FIGS. 3 and 4).

[0019] The fixing device 19 engages angle-shaped lock plates 24, 24 with the upper right shoulder portions of the two batteries 13R, 13L, which are arranged side by side, and tightens both ends of each lock plate 24, 24 in the longitudinal direction with a pair of rod-shaped lock bolts 25, 25 (a total of 4 bolts). One end of the lock bolt 25 is hooked (approximately J-shaped) to a plate-shaped locking portion 26 (a total of 4 locations) fixed to the upper surface of the base plate 18, while the other end is threaded and passes diagonally through the lock plate 24, and a wing nut 27 that can be tightened by hand is fastened to the threaded portion. With these lock plates 24 and lock bolts 25, the fixing device 19 presses the two batteries 13R, 13L toward the base plate 18, fixing the first battery 13R in the first fixed position and the second battery 13L in the second fixed position.

[0020] As shown in Figure 1, the cover body 14 has a right side (front left in Figure 1) where the control panel 17 and connection parts 28 for connecting hydraulic hoses (not shown) to construction machinery (e.g., tubing equipment) are located, a front side (front right in Figure 1), and four side walls (front side wall 29, right side wall 30) forming the left side and rear side (not shown) opposite these, and a ceiling 31 covering the top of each side wall. The ceiling 31 has two suspension holes 31a on the right side and two on the left side in the longitudinal middle section along the right and left sides of the cover body 14. This allows the hydraulic unit 11 to be lifted at four points using suspension ropes (not shown) when transporting it.

[0021] Furthermore, as can be seen in Figure 1, the cover body 14 is divided into three sections in the longitudinal direction (front-to-back direction) for ease of manufacture (Figure 2 shows the front section), and outward-opening doors 32, 33, 34, and 35 are provided on the side walls 29 and 30 of each divided section, which can be opened and closed using the joint as an axis (Figure 1).

[0022] As shown in Figure 2, the control panel 17 is constructed by assembling equipment such as a control box 37, display 38, switch box 39, and circuit breaker box 40 onto a frame-shaped stand 36. During the manufacturing stage, this sub-assembly is installed on the upper surface (base plates 20, 21) of the frame 12. When the cover body 14 is placed over the control panel 17, the operation panel and screen are exposed through a control panel opening 41 provided in the right side wall 30, allowing the operator to stand outside the cover body 14 and operate the hydraulic unit 11 (Figure 1).

[0023] On the other hand, the back of the control panel 17 is usually concealed by the cover body 14, but it can be accessed, for example, for maintenance, through a door opening 42 provided in the front wall 29 (Figure 3). Note that the door 32 that opens and closes the door opening 42 is not shown in Figure 3. In this way, the space S provided in a part (one corner) of the internal space of the cover body 14 is separated from the rest of the internal space by an inner wall surface 43 that defines the depth from the door opening 42 and an inner wall surface 44 that defines the width, as shown in Figure 2, and is formed into a roughly rectangular parallelepiped.

[0024] The door opening 42 is formed by a door frame (door perimeter member) 45 to which a cushioning material (not shown) is attached, and as shown in Figure 3, it has a width W and a height H, allowing the components 37, 38, 39, 40 of the control panel 17 and the fixed battery 13 to face the outside. In addition, one side of the door frame 45 is provided with a mounting portion 46 for attaching the suspension device 16 (Figure 2).

[0025] As shown in Figures 4 and 5, the mounting portion 46 is a box-shaped member positioned between the door frame 45 and the inner wall surface 44 perpendicular to the door frame 45, and fixed across them. The inner surface of the box is provided with a back nut that engages with a bolt 48 in the door opening width direction (up and down direction in Figure 5) for attaching the hinge 47 (fixed side). Furthermore, as shown in Figure 6, the height position of the mounting portion 46 is set as low as possible while ensuring the minimum necessary height for stable suspension and transport of the battery 13. In this embodiment, the mounting portion 46 is positioned below the midpoint in the height direction within the space S inside the cover body 14.

[0026] The door 32 that opens and closes the door opening 42 can be opened and closed using a connecting part (door hinge) 49 provided on the opposite side of the door frame 45 from one side as its axis (Figure 3). This allows the door 32 to be sufficiently separated from the transport path (movement route) of the battery 13 when it is open, improving the placement and operating conditions of the lifting device 16.

[0027] As shown in Figures 4 to 9, the suspension device 16 has an arm 50 with a suspension hole 50a at its tip for attaching a suspension device 15, and a hinge 47 that supports the arm 50. The arm 50 is made of an arm-shaped plate body that extends horizontally with an increased cross-section that resists the vertical bending direction, and has a bent portion 50b in the middle so that it is roughly L-shaped in plan view, and has a bolt hole at the base end for attaching the hinge 47 (movable side) using a bolt and nut 51. In addition, a handle 50c for rotational operation is provided at the upper end (plate end) of the arm 50. The hinge 47 consists of an upper and lower pair having a vertical pivot axis 47a, and supports the arm 50 so that it can rotate horizontally when attached to the mounting portion 46 using a bolt 48.

[0028] As shown in Figure 5, the suspension device 16 configured in this way can change its orientation between a stored state (solid line in Figure 5) where it is housed inside the cover body 14 and an extended state (dimensions line in Figure 5) where it is extended to the outside through the door opening 42 by rotating the arm 50 horizontally with the hinge 47 (rotation axis 47a) as the pivot point. In the stored state, the suspension device 16 is positioned so that the arm 50 follows the inner wall surface 44 and the entire device does not overlap with the projection of the door opening 42 (Figure 5). On the other hand, in the extended state, the bent portion 50b of the arm 50 is brought close to the door frame 45, and the suspension hole 50a is positioned so that it is as far away from the door frame 45 as possible within the range of rotation.

[0029] Furthermore, for safety and convenience, the hydraulic unit 11 includes a holding means 52 for holding the lifting device 16 in a stored state and a case 53 for housing the lifting equipment 15.

[0030] As shown in Figure 7, the retaining means 52 includes a bracket 54 provided on the inner wall surface 44 and a retaining pin 55 that can be inserted into and removed from overlapping pin holes (pipe holes) between the bracket 54 and the arm 50. The bracket 54 has one L-shaped side bolted to the inner wall surface 44, and an upper pipe material 56 that forms the upper pin hole is fixed to the other side. As shown in Figure 8, the upper pipe material 56 is provided with a notch 56a that engages with the handle plate 55a of the retaining pin 55. On the other hand, the lower pipe material 57 that forms the lower pin hole is fixed in line with the position of the bent portion 50b (inner surface) of the arm 50.

[0031] The case 53 is formed in the shape of a bottomed rectangular parallelepiped with an open top and is bolted to the inner wall surface 44 so as to be positioned above the stowed lifting device 16. The case 53 houses the lifting device 15 shown in Figure 6, as well as accessories such as a belt (e.g., a nylon sling) 58.

[0032] In the following section, an example of how the lifting device 16 is used will be described, specifically the process of bringing in the battery 13, with reference to Figures 7 to 12.

[0033] First, the retaining pin 55 is removed from the stowed lifting device 16 (Figure 7) to release its stowed position (Figure 8), and then the arm 50 is rotated towards the front (outside) to transition the lifting device 16 from the stowed position to the deployed position (Figure 9). Then, after attaching the lifting device 15 to the arm 50, for example, the first battery 13R is lifted together with the tray 22 from among the two batteries 13R and 13L prepared on a trolley (not shown). In this case, as shown in Figure 10, the first battery 13R, which is connected to the lifting device 15 via a belt 58, has its lifting point (center of gravity) aligned directly below the lifting device 15, thereby placing it in a position just outside the door frame 45, that is, one long side of the battery body facing the lower outer surface of the door frame 45.

[0034] When the first battery 13R is lifted to within the range of the door opening 42 (Figure 10), the first battery 13R is rotated in place to partially introduce it into the door opening 42, and the arm 50 is rotated inward to avoid contact between the first battery 13R and the control panel 17 (not shown in Figures 10 to 12). As a result, the arm 50 and the first battery 13R are introduced together into the space S inside the cover body 14, while changing their relative positions (orientations). When the first battery 13R reaches a position where one longitudinal side of the battery body is aligned with the inner wall surface 44 (see also Figure 6), its orientation is changed by approximately 90 degrees from the position where it was lifted to within the range of the door opening 42 (Figure 10), as shown by comparing Figure 10 and Figure 11 (Figure 11).

[0035] The first battery 13R, which has been suspended and transported in this manner, is lowered from its suspended position in space S within the cover body 14 to the bottom plate 18 of the frame 12. After the belt 58 is removed, it is manually slid across the bottom plate 18 to its first fixed position, and the lock plate 24 and lock bolt 25 are assembled to it, as shown in Figure 12. The second battery 13L is also suspended and transported into the cover body 14 using the same procedure as the first battery 13R, and the lock plate 24 and lock bolt 25 are assembled to it at its second fixed position on the bottom plate 18. In this way, by activating the fixing device 19, the two batteries 13R and 13L are stably fixed to their respective fixed positions (Figure 5). On the other hand, when releasing (disassembling) the fixing device 19 and transporting the batteries 13R and 13L outside the hydraulic unit 11, the reverse procedure of the above is performed.

[0036] As described above, the hydraulic unit 11 of the present invention allows the lifting device 16 for lifting and transporting the battery 13 to change its orientation from a stored state where it is stored inside the cover body 14 to an extended state where it is deployed outside through the door opening 42 by rotating the arm 50 horizontally with the hinge 47 as the pivot point. Therefore, when lifting and transporting the battery 13 by adjusting the direction of the arm 50, a compact manual lifting device (e.g., a lever hoist) 15 can be used. Moreover, when the battery 13 is suspended, it is possible to cross over the door frame 45 with a simple operation of just rotating the arm 50, which reduces the effort and burden of manual lifting and transport. In other words, a hydraulic unit 11 that can easily load and unload the battery 13 can be realized.

[0037] Furthermore, since the lifting device 16 is positioned in a location that does not overlap with the projection of the door opening 42 when it is in its retracted state, access to various devices (e.g., control box) 37 located near the battery 13 is improved, and maintenance inside the cover body 14 can be easily performed. In addition, since the lifting device 16 is provided with a holding means 52 to hold it in its retracted state, the lifting device 16 can be handled safely, contributing to the operation of the portable hydraulic unit 11.

[0038] Furthermore, since a retaining pin 55 is used as a simple holding means 52, not only is handling improved, but it is also inexpensive and easy to manufacture. In addition, since a case 53 for storing the lifting device 15 is provided on the inner wall surface 44 of the cover body 14, the lifting device 15 can be compactly stored while maintaining integration with the stored lifting device 16.

[0039] In addition, since a resin support member (e.g., a resin plate) 23 is provided between the battery 13 and the base plate 18, the battery 13 can slide smoothly on the base plate 18. Even if the battery 13 consists of multiple batteries (first battery 13R, second battery 13L), they can be easily placed in their designated positions with a simple operation of pushing or pulling each battery 13R, 13L individually. In other words, when handling multiple batteries 13R, 13L that share a common lifting and transport route, this greatly contributes to reducing the workload and improving work efficiency during assembly and maintenance.

[0040] It should be noted that the present invention is not limited to the above-described embodiments, and the battery mounting position can be appropriately changed according to the specifications of the hydraulic unit. Also, although the number of batteries is two in the embodiments, it may be one or three or more. Furthermore, the structure and arrangement of various devices such as suspension devices and fixing devices, and their related parts, are arbitrary. In the embodiments, a resin support member is provided on the battery side, but for example, it may be laid on the bottom plate of the frame. In addition, the holding means may be a simple configuration other than pin fastening, for example, using a band or string. [Explanation of Symbols]

[0041] 11...Hydraulic unit, 12...Frame, 13...Battery, 13R...First battery, 13L...Second battery, 14...Cover, 15...Lifting device, 15a...Operating lever, 15b...Chain, 16...Lifting device, 17...Control panel, 18...Bottom plate, 19...Fixing device, 20,21...Base plate, 22...Tray, 23...Support member, 24...Lock plate, 25...Lock bolt, 26...Locking part, 27...Wing nut, 28...Connection part, 29...Front side wall, 30...Right side wall, 31...Ceiling, 31a...Hanging hole, 32,33,34,35...Door, 36...Stand, 3 7...Control box, 38...Display, 39...Switch box, 40...Circuit breaker box, 41...Control panel opening, 42...Door opening, 43,44...Inner wall surface, 45...Door frame, 46...Mounting part, 47...Hinge, 47a...Rotating shaft, 48...Bolt, 49...Joint part, 50...Arm, 50a...Hanging hole, 50b...Bend, 50c...Handle, 51...Bolt and nut, 52...Retaining means, 53...Case, 54...Bracket, 55...Retaining pin, 55a...Handle plate, 56...Upper pipe material, 56a...Notch, 57...Lower pipe material, 58...Belt

Claims

1. The mounting frame and A hydraulic power source system including an engine, hydraulic pump, and battery mounted on the frame, A rectangular parallelepiped cover body that conceals the hydraulic power source device from the outside, In a portable hydraulic unit equipped with, The aforementioned frame is The base plate on which the aforementioned battery is placed, A fixing device for fixing the battery in a fixed position on the bottom plate, It has, The cover body is, A door opening that allows the aforementioned battery to be seen from the outside, A door that opens and closes the door opening, A lifting device with a detachable manual lifting device used when transporting the aforementioned battery, A mounting portion is provided on one side of the door frame that forms the door opening, to which the suspension device is attached, It has, The aforementioned suspension device is An arm provided with a suspension hole for attaching the aforementioned suspension device, A hinge that supports the arm so that it can rotate horizontally, A hydraulic unit having a hinge attached to the mounting portion, wherein the arm can be rotated horizontally with the hinge as a pivot point, thereby enabling a change in posture between a stored state where the arm is housed inside the cover body and an deployed state where the arm is deployed to the outside through the door opening.

2. The hydraulic unit according to claim 1, characterized in that the suspension device is positioned in a location that does not overlap with the projection of the door opening in the stored state.

3. The hydraulic unit according to claim 2, further comprising a holding means for holding the lifting device in the stored state.

4. The interior of the cover body is provided with an inner wall surface that is perpendicular to the door frame. The aforementioned retaining means is A bracket provided on the inner wall surface, A retaining pin that can be inserted into and removed from the pin holes that overlap vertically between the bracket and the arm, The hydraulic unit according to claim 3, characterized in that it has the following features.

5. The hydraulic unit according to claim 4, characterized in that the inner wall surface is provided with a case for housing the suspension device.

6. The battery and the bottom plate are interposed with a resin support member, The hydraulic unit according to any one of claims 1 to 5, characterized in that the batteries consist of a plurality of batteries that are sequentially lifted and transported using the lifting device.

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