JP2022107250A - Lifting magnet work machine - Google Patents

Abstract

To provide a lifting magnet work machine capable of improving the visibility of an operator in an operator cab when the operator visually confirms the vicinity of a ground surface in a diagonally right forward direction.SOLUTION: A revolving frame 6a of a revolving superstructure 6 is connected onto a lower traveling body 4 and a base end of a work front 2 including a lifting magnet 3 is connected to a bearing frame 7 provided at the center in the lateral direction on its front part. An operator cab 14 is provided on the left side of the bearing frame 7, an urea water tank 17 is provided on the right side, and a frame 20 is fixed onto the revolving frame 6a such that the urea water tank 17 is stored therein. A control panel 19 is arranged in a front part on the frame 20 and a power generation unit 27 including a hydraulic motor 25 and a power generator 26 is arranged in a rear part. A hydraulic pump is driven by an engine at a rear part of the revolving frame 6a and a hydraulic oil is supplied to the hydraulic motor 25 through a high pressure pipe to operate the power generator 26 so that the power generated by the power generator is supplied to a power control device 23 inside the control panel 19 to actuate the lifting magnet 3.SELECTED DRAWING: Figure 2

Description

The present invention relates to a lifting magnet working machine.

The lifting magnet working machine is a working machine that attracts objects to be adsorbed such as steel plates and scraps by the magnetic force of the lifting magnet and moves them to a desired place. As described in Patent Document 1, some lifting magnet work machines of this type use a hydraulic excavator as a base machine, and a lifting magnet is attached to the work front as an attachment to operate the lifting magnet. Equipment such as the power control device described below is provided.

The base hydraulic excavator has a swivel frame of the upper swivel body connected to the lower traverse body that can be run by a crawler via a swivel device, and a bearing frame at the front part of the swivel frame and substantially in the center in the left-right direction. Is provided. The base end of the articulated work front is connected to the bearing frame, and the driver's cab on which the operator is boarded is provided on the left side of the bearing frame. A machine room is provided at the rear of the swivel frame, and a hydraulic power unit is mounted inside the machine room. The hydraulic pump is driven by the engine constituting the hydraulic power unit, and hydraulic oil is supplied from the hydraulic pump to operate the above-mentioned crawler, swivel device, and work front, respectively.

On the right side of the swivel frame, a hydraulic oil tank and a fuel tank are provided adjacent to the front side of the machine chamber, and a urea water tank for storing the urea water for purifying the exhaust gas of the engine is provided on the front side thereof. Has been done. As a result, the urea water tank is arranged on the right side of the bearing frame when viewed from the cab.

The above is the basic configuration of the hydraulic excavator. In the case of a lifting magnet work machine, a lifting magnet is attached to the work front, and a control panel is provided on the front side of the urea water tank on the swivel frame. For mounting this control panel, the swivel frame is extended forward compared to a standard hydraulic excavator without a control panel. A power control device including a converter, an inverter, a driver, and a power storage device is housed in the control panel. A generator is directly connected to the engine of the hydraulic power unit together with a hydraulic pump to drive the engine, and the generated power is supplied to the control panel via high-voltage power lines. Then, the generated power is supplied to the lifting magnet and operated through rectification by the converter, voltage adjustment by the inverter, and drive control by the driver.

JP-A-2017-179479

However, the lifting magnet working machine of Patent Document 1 has room for improvement in terms of visibility of the operator in the driver's cab, particularly visibility diagonally forward to the right.
That is, the lifting magnet attached to the tip of the work front is located slightly to the right of the front when viewed from the operator in the driver's cab, and the positional relationship does not change even if the upper swing body turns. Then, the lifting magnet is moved to the object to be adsorbed and attracted, or the adsorbed object is moved to a desired place. For this reason, the line of sight of the operator during work is often focused on the area from the diagonally left front to the diagonally right front right including the lifting magnet in the plan view and near the ground surface corresponding to the diagonally downward side view. Visibility within the area is of particular importance.

In the lifting magnet working machine of Patent Document 1, a urea water tank is provided on the right side of the bearing frame, and a control panel is provided on the front side thereof. The urea water tank is located on the right side of the driver's cab with the bearing frame in between, so it does not significantly affect the visibility of the operator. It blocks the line of sight. Since such deterioration of visibility causes a decrease in work efficiency, measures for improving visibility when visually recognizing the vicinity of the ground surface diagonally forward to the right have been conventionally requested.

The present invention has been made to solve such a problem, and an object of the present invention is visibility when an operator in the driver's cab visually observes the front diagonally to the right and the vicinity of the ground surface with the bearing frame in between. It is to provide a lifting magnet working machine which can improve.

In order to achieve the above object, the lifting magnet working machine of the present invention includes a swivel frame of an upper swivel body rotatably connected to a tramable lower traveling body via a swivel device, and a front on the swivel frame. An articulated work front with a lifting magnet at the tip, which is connected to a bearing frame provided in the center of the left and right direction so that the base end can be changed, and an engine arranged on the swivel frame. A power control device that controls the electric power generated by the generator by using the driving force of the above and operates the lifting magnet, and an operator provided on one side of the swivel frame with the bearing frame sandwiched between them. A lifting magnet working machine provided with a driver's cab and a urea water tank provided on the other side of the bearing frame on the swivel frame to store urea water for purifying the exhaust of the engine. In, the front edge of the urea water tank is located near the front edge of the swivel frame, and the power control device is supported from the swivel frame via a pedestal and is arranged directly above the urea water tank. It is characterized by being.

According to the lifting magnet working machine of the present invention, it is possible to improve the visibility when the operator in the driver's cab visually observes diagonally forward and near the ground surface on the opposite side of the bearing frame.

It is a side view which shows the lifting magnet working machine of embodiment. It is a detailed view of part A of FIG. 1 in which the work front is not shown. It is the B arrow view of FIG. 1 which did not show the work front. FIG. 1 is a view taken along the line C of FIG. 1 in which the work front is not shown. It is a side view corresponding to FIG. 2 which showed the positional relationship of a urea water tank, a control panel and a power generation unit by removing a gantry cover and a side unit cover.

Hereinafter, an embodiment of a lifting magnet working machine that embodies the present invention will be described.
FIG. 1 is a side view showing the lifting magnet working machine of the present embodiment, and in the following description, the front-rear direction, the left-right direction, and the up-down direction are defined mainly by the operator boarding the lifting magnet working machine. The lifting magnet work machine 1 of the present embodiment uses a general hydraulic excavator as a base machine, and a lifting magnet 3 is attached to the work front 2 as an attachment, and devices for operating the lifting magnet 3 (power control described later). The device 23, the power generation unit 27, etc.) are provided.

A pair of left and right crawlers 5 are provided on the lower traveling body 4 of the lifting magnet working machine 1, and these crawlers 5 are driven by a traveling hydraulic motor (not shown) to allow the lower traveling body 4 to travel. A swivel frame 6a of the upper swivel body 6 is connected to the lower traveling body 4 via a swivel device (not shown), and is driven by a swivel hydraulic motor 13 (shown in FIG. 4) provided in the swivel device to be described above. The swivel body 6 is designed to swivel. A bearing frame 7 is provided at the front portion on the swivel frame 6a and substantially in the center in the left-right direction, and the base end of the boom 8 is connected to the bearing frame 7 via a shaft 8a. The base end of the arm 9 is connected to the tip of the boom 8 via a shaft 9a, and the lifting magnet 3 is connected to the tip of the arm 9 via a shaft 3a, thereby forming an articulated work front 2. ing.

The angle of the boom 8 with respect to the upper swing body 6 is changed by driving the boom cylinder 10 around the shaft 8a, and the angle of the arm 9 with respect to the tip of the boom 8 is changed by driving the arm cylinder 11 with respect to the shaft 9a. .. Further, the lifting magnet 3 is suspended from the tip of the arm 9 via the shaft 3a without being driven by the cylinder, and is always maintained in a posture in which the suction surface faces downward due to its own weight, and is covered with a steel plate, scrap, or the like. The adsorbent S can be adsorbed. The angle of the lifting magnet 3 may also be changed by driving the cylinder.

FIG. 2 is a detailed view of part A of FIG. 1 in which the work front 2 is not shown, FIG. 3 is a view taken along the arrow B of FIG. 1 in which the work front 2 is not shown, and FIG. 4 is a view in which the work front 2 is not shown. It is a C arrow view of 1.
On the swivel frame 6a, the swivel hydraulic motor 13 of the swivel device described above is provided on the rear side of the bearing frame 7 to swivel the upper swivel body 6. A driver's cab 14 on which the operator is boarded is provided on the left side (corresponding to one side of the present invention) sandwiching the bearing frame 7 on the swivel frame 6a, and the operator operates an operation device (not shown) provided in the driver's cab 14. Then, the lifting magnet working machine 1 is operated.

On the other hand, the rear portion of the swivel frame 6a is mainly covered with the building cover 15, and the building cover 15 is composed of the machine room cover 15a, the hydraulic oil tank cover 15b, and the fuel tank cover 15c. The machine room cover 15a extends over the entire left and right at the rearmost portion on the swivel frame 6a, and the machine room 16 defined by the machine room cover 15a is not shown with an engine as a power source. It is equipped with a hydraulic power unit. The configuration of the hydraulic power unit is well known and will not be described in detail. However, the hydraulic pump is driven by the engine, and the discharged hydraulic oil is switched and controlled by the hydraulic circuit according to the operation of the operating device by the operator to control the hydraulic actuator, for example, the above. This is a hydraulic system that supplies and drives a traveling hydraulic motor, a turning hydraulic motor 13, a boom cylinder 10, an arm cylinder 11, and the like. As a result, the lifting magnet work machine 1 travels, the upper swing body 6 turns, the work front 2 operates, and the like according to the operator's operation.

The hydraulic oil tank cover 15b is provided adjacent to the front side of the machine room cover 15a on the right side of the swivel frame 6a, and an operation (not shown) for storing hydraulic oil supplied to each hydraulic actuator by the hydraulic power unit is provided inside the hydraulic oil tank cover 15b. Contains an oil tank. The fuel tank cover 15c is provided adjacent to the front side of the hydraulic oil tank cover 15b, and a fuel tank (not shown) for storing engine fuel is housed inside the fuel tank cover 15c. A urea water tank 17 for storing urea water for purifying the exhaust gas of the engine is arranged on the front side of the fuel tank cover 15c, and is fixed on the swivel frame 6a by bolts (not shown). As a result, the urea water tank 17 is arranged on the right side (corresponding to the other side of the present invention) sandwiching the bearing frame 7 when viewed from the cab 14. If there is room for space to form a recess on the upper surface of the swivel frame 6a, the urea water tank 17 may be arranged in the recess.

The details will be described later, but in the present embodiment, a different installation structure is adopted without providing the control panel 119 (shown in FIGS. 2 and 4) on the front side of the urea water tank on the swivel frame as in Patent Document 1. is doing. Therefore, the swivel frame 6a is not extended forward for mounting the control panel 19, and is maintained at the same front-rear length as that of the standard hydraulic excavator. As a result, the leading edge 17a of the urea water tank 17 is located near the leading edge 6a1 of the swivel frame 6a.

FIG. 5 is a side view corresponding to FIG. 2 showing the positional relationship between the urea water tank 17, the control panel, and the power generation unit by removing the gantry cover and the side unit cover. The installation structure of the control panel and the like will be described.

In short, the control panel 19 is supported from the swivel frame 6a via the gantry 20 and is arranged directly above the urea water tank 17. The gantry 20 has a square box shape that opens downward, and is fixed on the swivel frame 6a by bolts (not shown). The front surface of the gantry 20 is located near the leading edge 6a1 of the swivel frame 6a, the rear surface is adjacent to the fuel tank cover 15c, the left surface is adjacent to the bearing frame 7, and the right surface is located near the right edge of the swivel frame 6a. .. A space is formed on the swivel frame 6a by the gantry 20, and the urea water tank 17 is housed inside.
The gantry 20 does not necessarily have to be box-shaped, and the shape can be arbitrarily changed as long as the control panel 19 and the power generation unit described below can be supported from the swivel frame 6a. For example, an angle material or the like is welded. It may be a frame structure.

Since the purification action of NOx using urea water is well known, the details will not be described, but the urea water stored in the urea water tank 17 is injected from the urea water injector into the exhaust passage of the engine to hydrolyze the urea water. The generated ammonia is supplied to the SCR catalyst on the downstream side and exerts a NOx reducing action in the exhaust gas.

A control panel 19 is arranged on the front portion of the upper surface of the gantry 20 and is fixed by bolts 21 and nuts 22. The control panel 19 has a square box shape in which the left and right dimensions are larger than the front and rear dimensions, and the power control device 23 is housed inside. Although not shown, the power control device 23 includes a converter, an inverter, a driver, and a power storage device, and the driver is connected to the lifting magnet 3 via a high-voltage power line arranged along the work front 2.

The front surface of the control panel 19 is configured as a removable door 19a that can be opened and closed, and although not shown, it is fixed to the control panel 19 by bolts and a key lock mechanism is provided to prevent opening and closing by an outsider. There is. Maintenance such as periodic inspection and repair of the power control device 23 in the control panel 19 is performed after the key lock mechanism and the bolts are released and the door 19a is removed from the control panel 19. However, the openable / closable door of the present invention is not limited to the removable door 19a as in the present embodiment, and may be configured as a door that can be opened / closed around a hinge, for example. Reference numeral 24 denotes a decorative plate that closes the gap formed between the bearing frame 7 and the control panel 19.

On the other hand, a power generation unit 27 including a hydraulic motor 25 and a generator 26 is disposed at the rear of the upper surface of the gantry 20, and is fixed to the upper surface of the gantry 20 by bolts 28 and nuts 29, respectively. As a result, the power generation unit 27 is arranged directly above the urea water tank 17 together with the control panel 19. Although not shown, one end of a high-pressure pipe is connected to the hydraulic motor 25, the high-pressure pipe extends rearward on the swivel frame 6a, and the other end is a hydraulic pump driven by the engine of the hydraulic power unit in the machine chamber 16. It is connected to the. The generator 26 is directly connected to the hydraulic motor 25, and its output terminal is connected to the converter of the power control device 23 in the control panel 19 via a high-voltage electric wire. Therefore, hydraulic oil is supplied from the engine of the hydraulic power unit to the hydraulic motor 25, the generator 26 is driven by the hydraulic motor 25, and the generated power is input to the converter of the power control device 23. That is, the power generation unit 27 functions to convert the hydraulic pressure of the hydraulic oil generated by the hydraulic power unit into electric power.

Therefore, hydraulic oil is supplied from the hydraulic pump, and the generator 26 is driven by the hydraulic motor 25. The generated power is rectified by the converter of the power control device 23, voltage is adjusted by the inverter, driven and controlled by the driver, and supplied to the lifting magnet 3 to operate.
The hydraulic pump that supplies hydraulic oil to the hydraulic motor 25 may be shared with, for example, an existing hydraulic pump that drives a hydraulic actuator, or a dedicated hydraulic pump may be directly connected to the engine.

The gantry 20, the control panel 19, and the power generation unit 27 configured as described above are covered with a cover similar to the building cover 15 described above. Specifically, the gantry cover 30 is fixed to the right side of the gantry 20 by bolts (not shown), and the side unit cover 31 is fixed to the right side of the control panel 19 and the power generation unit 27 by bolts (not shown). These covers 30 and 31 are arranged so as to be flush with the right side surface of the fuel tank cover 15c located on the rear side without protruding from the right side edge of the swivel frame 6a, and are arranged so as to be flush with the right outer wall of the lifting magnet work machine 1. Is forming.

Further, an upper unit cover 32 is fixed to the upper side of the power generation unit 27 by a bolt (not shown), whereby the power generation unit 27 is concealed from above. The upper surface of the upper unit cover 32 is arranged so as to be slightly lower than the upper surface of the fuel tank cover 15c located on the rear side and flush with the upper surface of the control panel 19 located on the front side.

Anti-slip plates 33 and 34 are fixed to the upper surface of the control panel 19 and the upper surface of the upper unit cover 32, respectively, in order to function as a part of the maintenance passage provided on the upper swivel body 6. Further, the lower step 35 is fixed to the leading edge 6a1 of the swivel frame 6a, the middle step 36 is fixed to the gap between the bearing frame 7 and the control panel 19, and the upper surfaces of the steps 35 and 36 are anti-slip processed. Is given. Similarly, the anti-slip plate 37 is appropriately fixed to the upper surface of the building cover 15 such as the upper surface of the fuel tank cover 15c.

In the conventional lifting magnet working machine, the middle step 36 is provided on the front surface of the control panel 19, but in the present embodiment, the middle step 36 is on the left side of the control panel 19 in order to make the front surface function as the door 19a. The position has been changed.

As described above, the maintenance passage 38 including the lower step 35, the middle step 36, the upper surface of the control panel 19, the upper surface of the upper unit cover 32, the upper surface of the fuel tank cover 15c, the upper surface of the hydraulic oil tank cover 15b, and the upper surface of the machine room cover 15a is formed. It is formed so that an operator can freely walk on the maintenance passage 38 and move back and forth between the ground surface G and the upper swivel body 6. Reference numeral 39 denotes a handrail held by the operator when walking in the maintenance passage 38.

Next, in the lifting magnet working machine 1 configured as described above, the field of view of the operator boarding the driver's cab 14 will be described.

As described in [Problems to be Solved by the Invention], the line of sight L of the operator during work is within the region α from the diagonally left front to the diagonally right front right including the lifting magnet 3 in the plan view shown in FIG. Moreover, in the side view shown in FIG. 1, it is often poured in the vicinity of the ground surface G diagonally below. When the operator visually recognizes the object diagonally forward to the right, it is difficult to say that the visibility is originally good because the target object is visually observed through the base end of the boom 8, and further, in the technique of Patent Document 1, two points are shown in FIGS. As shown by the chain line, the line of sight L is blocked by the control panel 119 arranged on the front side of the urea water tank 17.

In the present embodiment, the control panel 19 is arranged directly above the urea water tank 17 using the gantry 20, and it is not necessary to extend the swivel frame 6a forward for mounting the control panel 19 accordingly. Therefore, the front-rear length of the swivel frame 6a, which is the same as the standard specification, is maintained. As a result, as shown by the arrows in FIGS. In addition to being able to prevent it, the visibility of the leading edge 6a1 of the swivel frame 6a can be improved because it does not block the line of sight L.

In addition, in the present embodiment, the power generation unit 27 is also arranged on the gantry 20 together with the control panel 19, and this installation structure has the advantages described below as compared with the technique of Patent Document 1.

In the lifting magnet work machine 1 of Patent Document 1, a generator (corresponding to the generator 26 of the present embodiment) is directly connected to the engine of the hydraulic power unit arranged at the rear part of the upper swing body, and the generated power is transferred to the front of the upper swing body. It is supplied to the control panel 119 (shown in FIGS. 2 and 4) arranged in the unit. High-voltage power lines are laid on the upper swivel body for power supply along a long path from the rear to the front. Since the high-voltage power line needs to be inspected regularly so that it will not be worn out by vibration during work and leak, it may be a factor that impairs the maintainability of the lifting magnet work machine 1.

On the other hand, in the present embodiment, the hydraulic pump is driven by the engine of the hydraulic power unit arranged at the rear of the upper swing body 6, and the discharged hydraulic oil is the hydraulic pressure of the power generation unit 27 arranged at the front of the upper swing body 6. It is supplied to the motor 25, and the generated power from the generator 26 is supplied to the control panel 19 adjacent to the power generation unit 27. Therefore, in order to supply the hydraulic oil, a high-voltage pipe is extended from the rear part to the front part of the upper swing body 6 instead of the high-voltage electric wire of Patent Document 1, but the high-voltage pipe has no risk of electric leakage and also has no risk of electric leakage. Since it is robust, it is much less likely to cause trouble than high-voltage power lines. Therefore, the reliability and durability of the lifting magnet working machine 1 can be improved, and maintainability can be improved because periodic inspections and the like assuming troubles are not required.

In order to replace the high-voltage electric wire with the high-voltage pipe in this way, it is necessary to mount the power generation unit 27 including the hydraulic motor 25 on the front part of the upper swing body 6, but based on the idea of Patent Document 1, the control panel As with 19, the power generation unit 27 can only be conceived so as to be arranged on the front side of the urea water tank 17. Therefore, the upper swing body 6 is further extended forward for mounting the power generation unit 27, and the condition regarding the operator's field of view is further deteriorated.

According to the present embodiment in which the power generation unit 27 is arranged on the gantry 20 together with the control panel 19, it is possible to prevent the operator's line of sight L from being obstructed by the power generation unit 27 and to turn for mounting the power generation unit 27. Since it is not necessary to extend the frame 6a forward, the leading edge 6a1 of the swivel frame 6a does not block the line of sight L. Therefore, the high-voltage electric wire on the swivel frame 6a can be replaced with the high-voltage pipe without causing any adverse effect, and thereby the above-mentioned advantages related to reliability and the like can be achieved.

In addition, in the present embodiment, the power generation unit 27 is arranged at the rear part on the gantry 20, the control panel 19 is arranged at the front part, and a removable door 19a that can be opened and closed is provided at the front part. Such a configuration greatly contributes to improving the maintainability of the power control device 23 in the control panel 19.
In order to maintain the internal power control device 23, it is necessary to provide the door 19a on any of the front, rear, left and right surfaces of the control panel 19. In order for an operator standing on the ground surface G to carry out maintenance, it is desirable to provide a door 19a at a position where the inside of the control panel 19 can be easily seen, and each device constituting the power control device 23 is visually inspected and inspected thoroughly. Therefore, it is desirable to secure as large an opening area as possible.

If the control panel 19 is arranged at the rear part (rear side of the power generation unit 27) on the gantry 20, the front surface thereof is blocked by the power generation unit 27, the rear surface is blocked by the fuel tank cover 15c, and the left side surface is the bearing frame 7. A door 19a is provided on the right side surface of the remaining control panel 19 because it is blocked by the control panel 19. In this case, although the operator standing on the right side of the control panel 19 can open the door 19a for maintenance, the opening area when the door 19a is opened is small because the left side surface of the control panel 19 is narrow, and particularly the control panel 19 It becomes difficult to visually and inspect the equipment installed in the inner part.

On the other hand, when the control panel 19 is arranged on the front portion (front side of the power generation unit 27) on the gantry 20 as in the present embodiment, the door 19a can be provided without blocking the front surface thereof. In this case, a worker standing on the front side of the control panel 19 can open the door 19a for maintenance, and of course, since the front surface of the control panel 19 is wider than the left side surface, a large door 19a can be installed and the door 19a can be opened. The depth inside the control panel 19 at that time becomes shallow. Combined with these factors, even a device installed in the inner part of the control panel 19 can be easily visually inspected and inspected, and its maintainability can be further improved.

Although the description of the embodiment is completed above, the aspect of the present invention is not limited to this embodiment. For example, in the above embodiment, the cab 14 is provided on the left side of the bearing frame 7 on the swivel frame 6a and the urea water tank 17 is provided on the right side. A urea water tank 17 may be provided on the left side. In this case, the visibility of the operator in the driver's cab 14 diagonally to the left is not good, but by disposing the control panel 19 and the power generation unit 27 on the urea water tank 17, the same as in the above embodiment. The action and effect of can be achieved.

Further, in the above embodiment, the power generation unit 27 is fixed on the gantry 20 together with the control panel 19, but the present invention is not limited to this. For example, as in the technique of Patent Document 1, the generator 26 is housed in the rear machine room 16 on the swivel frame 6a and driven by the engine, and the generated power is provided in the front portion of the swivel frame 6a. It may be supplied to the control panel 19 on the gantry 20 via a high-voltage electric wire.

Further, the above embodiment is embodied as a lifting magnet working machine 1 including a working front 2 including a boom 8, an arm 9 and a lifting magnet 3 and traveling by a crawler 5, but the present invention is not limited to this. For example, the configuration of the work front 2 may be changed, or the work front 2 may be applied to a lifting magnet work machine provided with tires instead of the crawler 5.

Further, the above embodiment has been embodied as a lifting magnet working machine 1 that runs the vehicle 1 and turns the upper swing body 6 by supplying hydraulic oil from the hydraulic power unit to the hydraulic actuator, but the present invention is not limited to this. .. For example, it is applied to a hybrid type lifting magnet work machine that drives a generator by an engine and supplies the generated power to a traveling electric motor and a turning electric motor to run the vehicle 1 and turn the upper turning body 6. You may.

1 Lifting magnet work machine 2 Work front 3 Lifting magnet 4 Lower traveling body 6 Upper swinging body 6a Swinging frame 7 Bearing frame 14 Driver's cab 17 Urea water tank 19 Control panel 19a Door 20 Stand 23 Power control device 25 Hydraulic motor 26 Generator 32 Upper unit cover 38 maintenance passage

Claims (4)

The swivel frame of the upper swivel body, which is rotatably connected to the lower traverse body that can be traversed via a swivel device,
An articulated work front with a lifting magnet at the tip, which is connected to a bearing frame provided at the front part of the swivel frame and substantially in the center in the left-right direction so that the base end can be changed at an angle.
An electric power control device that controls the electric power generated by the generator by utilizing the driving force of the engine arranged on the turning frame and operates the lifting magnet.
A driver's cab on the swivel frame, which is provided on one side of the bearing frame and on which an operator is boarded.
A urea water tank on the swivel frame, which is provided on the other side of the bearing frame and stores urea water for purifying the exhaust gas of the engine.
In a lifting magnet working machine equipped with
The leading edge of the urea water tank is located near the leading edge of the swivel frame.
The power control device is a lifting magnet working machine that is supported from the swivel frame via a gantry and is arranged directly above the urea water tank. The engine is mounted at the rear on the swivel frame and drives a directly connected hydraulic pump to discharge hydraulic oil.
The hydraulic pump supplies the discharged hydraulic oil to the hydraulic motor via a high-pressure pipe to drive the generator directly connected to the hydraulic motor.
The lifting magnet working machine according to claim 1, wherein the hydraulic motor and the generator are arranged directly above the urea water tank by being fixed on the gantry together with the power control device. .. The hydraulic motor and the generator are arranged at the rear part on the gantry.
The power control device is arranged in the front part on the gantry and housed inside the control panel.
The lifting magnet working machine according to claim 2, wherein the control panel has a square box shape having a left-right dimension larger than the front-rear dimension and is provided with a door that can be opened and closed at the front surface. The hydraulic motor and the generator are concealed by an upper unit cover from above.
The lifting magnet work according to claim 3, wherein the upper surface of the upper unit cover and the upper surface of the control panel function as a part of a maintenance passage in which an operator provided on the upper swing body can walk. Machine.

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