JP5404660B2 - Construction machinery - Google Patents

Description

  The present invention relates to a construction machine such as a hydraulic excavator provided with an opening / closing cover that opens and closes an opening for maintenance and inspection formed in an upper portion of a building cover that covers an engine room.

  There exists a thing shown by patent document 1 as this kind of prior art. Patent Document 1 discloses a hydraulic excavator including a working device including a boom, an arm, and a bucket, and a revolving body to which the working device is attached. The hydraulic excavator is formed in an engine room disposed on the revolving structure, a building cover covering the engine room, an upper part of the building cover, an opening for maintenance and inspection in the engine room, and the opening. Is provided with an engine compartment cover, that is, an engine compartment opening / closing cover that is attached so as to be rotatable in the vertical direction. The engine compartment opening / closing cover is formed of a pressed steel sheet.

  The hydraulic excavator is provided on a rear surface of the engine compartment opening / closing cover, and is provided with a rod-like body that is provided so as to be rotatable in the vertical direction and can hold the engine compartment opening / closing cover with the opening of the building cover open. A stay guide that guides the stay as the engine compartment opening / closing cover opens and closes, that is, a guide bracket is provided. The stay is rotatably held by a bracket fixed to the building cover. Normally, various devices such as a heat exchanger are arranged around the engine compartment opening / closing cover.

JP 2007-69673 A

  In the above-described prior art, when maintenance of equipment around the engine compartment opening / closing cover is difficult, such as a small model, it is difficult to secure the operator's footing, the worker is placed on the engine compartment opening / closing cover. There are times when you want to ride and perform maintenance and inspection work. However, in the above-described prior art, since the opening is formed below the engine compartment opening / closing cover made of a single plate, when the operator gets on the engine compartment opening / closing cover, the engine compartment opening / closing cover is bent and deformed. May occur. That is, in the conventional technology, it is not sufficient to ensure the rigidity of the engine compartment opening / closing cover part when an operator takes on the ride. Therefore, an operator cannot get on the engine compartment opening / closing cover to perform maintenance and inspection work, and the engine compartment opening / closing cover of such an engine compartment opening / closing cover is used in order to perform work using the position avoiding the engine compartment opening / closing cover. The maintenance and inspection work for peripheral equipment could not be improved.

  The present invention is made from the actual state in the above-described prior art, and an object thereof is to provide a construction machine capable of ensuring sufficient rigidity of an engine compartment opening / closing cover portion arranged in an upper portion of a building cover. It is in.

  In order to achieve this object, the present invention provides a working device, a swivel body to which the work device is attached, an engine room disposed on the swivel body, a building cover made of a steel plate and covering the engine room, A building frame made of steel material to which the building cover is fixed, an opening for maintenance and inspection formed in the upper part of the building cover, and the opening and closing of the opening can be opened and closed to the building frame. And a stay made of a steel rod-like body that is provided so as to be pivotable in the vertical direction and can hold the engine chamber opening / closing cover in an open state, and A construction machine comprising a guide bracket made of a steel material fixed to the rear surface of the engine compartment opening / closing cover and guiding the stay as the engine compartment opening / closing cover is opened / closed And extending to cross the opening, fixed to the building frame, and provided with a reinforcing frame made of steel, and the stay is attached to the reinforcing frame so as to be pivotable in the vertical direction. When the engine compartment opening / closing cover is placed on the building cover in a state where the opening is closed, the shape is set on the reinforcing frame and can be brought into contact with the reinforcing frame. Yes.

  The present invention configured as described above is provided with a reinforcement frame fixed to the building frame so as to cross the opening when the opening formed in the upper part of the building cover is closed by the engine room opening / closing cover. The guide bracket fixed to the back surface of the cover and guiding the stay can be brought into a contactable state. Therefore, when an operator who performs maintenance and inspection work on the equipment around the engine compartment opening / closing cover gets on the engine compartment opening / closing cover, the load from the operator removes the guide bracket and the reinforcing frame from the engine compartment opening / closing cover. To the building frame having sufficient rigidity. As a result, a desired operation can be performed without causing the engine chamber opening / closing cover to bend and deform. That is, it is possible to ensure sufficient rigidity of the engine compartment opening / closing cover portion disposed in the upper portion of the building cover.

  In the present invention, since the reinforcing frame also serves as a support member that rotatably supports the stay, there is no need for a separate member for supporting the stay. That is, an increase in the number of members can be suppressed.

  According to the present invention, in the above invention, the reinforcing frame is made of a single steel material extending across the central portion of the opening, and the guide bracket closes the opening in the engine compartment. When the opening / closing cover is disposed on the building cover, the opening / closing cover is made of one steel material capable of coming into contact with the reinforcing frame.

  In the present invention, the engine room opening / closing cover is provided so as to be pivotable in the front-rear direction of the revolving structure, the reinforcing frame is extended in the front-rear direction of the revolving body, and the stay is It is characterized by being attached so as to be rotatable in the front-rear direction of the revolving structure.

  Further, the present invention is the above-mentioned invention, wherein the reinforcing frame has an L-shaped cross section having a side surface portion to which the stay is attached and a flat upper surface portion connected to the upper end of the side surface portion. Is connected to the upper surface portion fixed to the back surface of the engine compartment opening / closing cover and one side end portion of the upper surface portion, and guides the tip of the stay during the opening / closing operation of the engine compartment opening / closing cover. One side surface portion having a guide groove, and a locking groove that is connected to the guide groove and that locks the tip end portion of the stay when the engine compartment opening / closing cover opens the opening, and the upper surface portion Connected to the other side end portion of the other side surface portion so as to be opposed to the one side surface portion, and connected to the lower end of the other side surface portion to close the opening. The engine compartment opening / closing cover When was placed on ya cover is characterized in that set into a shape having a contact capable of flats on the upper surface of the reinforcing frame.

  The present invention further includes a heat exchanger disposed on one side of the revolving structure and a fuel tank disposed on the other side of the revolving structure, wherein one end of the reinforcing frame is connected to the revolving frame. The second building frame is fixed to the upper end of the first building frame fixed upright and fixed to the revolving frame of the body, and is fixed to the second building frame extending in the left-right direction of the revolving body, and the other end of the reinforcing frame is connected to the second building frame. It is characterized by being fixed to a third building frame that is arranged so as to face the building frame and extends in the left-right direction of the revolving structure so as to connect the heat exchanger and the fuel tank.

  The present invention is provided with a reinforcing frame made of a steel material that extends across a maintenance / inspection opening formed in the upper part of a building cover that covers the engine compartment, is fixed to the building frame, and opens and closes the opening. The engine room opening / closing cover is configured such that a stay made of a steel rod-like body capable of holding the opening in an open state is attached to the reinforcing frame so as to be rotatable in the vertical direction. Further, the present invention provides a reinforcing frame when the shape of the guide bracket made of a steel material that guides the stay as the engine compartment opening / closing cover is opened and closed is disposed on the building cover in a state where the opening is closed. It is located on the top and is set in a shape that can contact the reinforcing frame. With these configurations, the present invention can ensure sufficient rigidity of the engine compartment opening / closing cover portion disposed in the upper portion of the building cover. Therefore, according to the present invention, an operator rides on the engine compartment opening / closing cover with the opening closed, and maintenance and inspection of equipment around the engine compartment opening / closing cover without causing bending deformation of the engine compartment opening / closing cover. Work can be performed, and the efficiency of maintenance and inspection work of equipment around the engine compartment opening / closing cover can be improved as compared with the conventional case. Moreover, since the reinforcing frame also serves as a support member for the stay, an increase in the number of members can be suppressed. Along with this, the manufacturing cost and the cost required for member management can be suppressed to the same level as before.

It is a side view which shows the small turning type hydraulic excavator which comprises one Embodiment of the construction machine which concerns on this invention. It is a top view which shows the state except the cab etc. in the turning body with which this embodiment is equipped. FIG. 3 is a perspective view showing a state in which an engine or the like is removed from an engine room provided in the swing body shown in FIG. FIG. 4 is an enlarged cross-sectional view of an engine compartment opening / closing cover as seen from the direction A in FIG. 3. FIG. 3 is a perspective view of the engine compartment provided in the swivel body shown in FIG. 2 excluding an engine, an engine compartment opening / closing cover, and the like. FIG. 6 is a plan view of FIG. 5. It is a perspective view which shows the state which opened the engine compartment opening / closing cover from the state shown in FIG. It is a side view which shows the state which opened the engine compartment opening / closing cover from the state shown in FIG. It is a principal part enlarged view of FIG.

  Embodiments of a construction machine according to the present invention will be described below with reference to the drawings.

  A construction machine according to an embodiment of the present invention is a small swivel type in which, for example, the shape and size of a building cover is relatively small, and the maintenance and inspection work on the building cover is subject to restrictions on securing an operator's scaffold. It is a hydraulic excavator. As shown in FIG. 1, this small turning type hydraulic excavator is attached to a traveling body 1, a turning body 2 disposed on the traveling body 1, and a swiveling body 2 so as to be rotatable in the vertical direction. , An arm, and a bucket, and a working device 3 that performs excavation work of earth and sand.

  An operator cab 4 and a counterweight 5 are arranged on the revolving body 2, and an engine chamber in which devices such as an engine and a hydraulic pump are accommodated between the operator cab 4 and the counterweight 5. 6 is arranged.

  As shown in FIG. 2, the small swivel hydraulic excavator according to the present embodiment has a hydraulic oil tank 7 disposed on the inner side of the right front position of the engine chamber 6 on the swivel frame 2 a of the swivel body 2. The fuel tank 8 is arranged in the front.

  Further, in this embodiment, as shown in FIGS. 2, 3, 5 and 6, a heat exchanger 9 is disposed adjacent to the engine compartment 6, and this heat exchanger 9 is covered by a heat exchanger opening / closing cover 10. It has been broken. A handle 10a is attached to the heat exchanger opening / closing cover 10.

  Moreover, this embodiment is provided with the building cover 11 which consists of one steel plate and covers the engine compartment 6, as shown in FIG. The building cover 11 is formed with a vent hole 11a for exhaust in the engine compartment 6 and an anti-slip portion 11b for an operator's foot riding on the building cover 11. Further, as shown in FIGS. 5, 6, 7, etc., an opening 11 c for maintenance and inspection in the engine room 6 is formed in the upper portion of the building cover 11. An operator who rides on the building cover 11 performs various operations such as an engine oil supply operation and a fan belt adjustment operation through the opening 11c. As shown in FIGS. 2 and 8, the building cover 11 has a side surface portion 11d facing the heat exchanger 9 described above, and the cooling air guided into the engine compartment 6 by the side surface portion 11d. A vent hole 11a that forms an inflow port is formed.

  In addition, as shown in FIGS. 2, 4, 7, etc., the present embodiment includes an engine compartment opening / closing cover 12 that allows the opening 11 c to be opened and closed. A handle 12 a is attached to the engine compartment opening / closing cover 12, and an anti-slip portion 12 b for an operator's foot and a vent hole 12 c for exhaust in the engine compartment 6 are formed. As shown in FIGS. 3 and 4, the first building frame 14 a that is erected and fixed to the revolving frame 2 a by welding, and is fixed to the upper end of the first building frame 14 a by welding and extends in the left-right direction of the revolving structure 2. A second building frame 14b is provided, and the engine compartment opening / closing cover 12 can be pivoted vertically on the second building frame 14b via the hinge 15 and can be pivoted in the front-rear direction of the revolving structure 2. It is attached. Further, as shown in FIG. 4, the engine compartment opening / closing cover 12 has a bent portion 12d formed by bending a peripheral portion downward, and a rubber 12e is attached to the bent portion 12d. When the engine compartment opening / closing cover 12 is closed, the rubber 12e comes into contact with the building cover 11. As shown in FIGS. 3 and 5, a support base 13 on which an engine (not shown) is mounted is provided in the engine chamber 6.

  Further, as shown in FIGS. 4, 7, 8, 9, etc., the present embodiment is made of steel that is provided so as to be rotatable in the vertical direction and that can hold the engine compartment opening / closing cover 12 with the opening 11 c open. And a guide bracket 18 made of a steel material that is welded and fixed to the back surface of the engine compartment opening / closing cover 12 and guides the stay 17 when the engine compartment opening / closing cover 12 is opened and closed. The stay 12 is provided so as to be rotatable in the front-rear direction of the revolving structure 2.

  As shown in FIGS. 4, 6, and 7, the present embodiment includes a reinforcing frame 16 made of a steel material that is fixed to a building frame so as to cross, for example, the central portion of the opening 11 c. As shown in FIG. 6 and the like, the reinforcing frame 16 is made of, for example, one steel material that extends in the front-rear direction of the swivel body 2. As shown in FIG. 4, the reinforcing frame 16 has an L-shaped cross section having a side surface portion 16b on which the stay 17 is rotatably supported, and a flat upper surface portion 16a that is connected to the upper end of the side surface portion 16b. Made of shape. As shown in FIGS. 5 and 6, for example, the reinforcing frame 16 is arranged such that one end is welded and fixed to the second building frame 14 b and the other end is opposed to the second building frame 14 b. It is welded and fixed to a third building frame 14c shown in FIG. 7 that is connected to the fuel tank 8 in the left-right direction so as to connect the fuel tank 8. That is, the reinforcing frame 16 is made of a single steel material that extends in the front-rear direction of the revolving structure 2.

  In the present embodiment, the shape of the guide bracket 18 is positioned on the reinforcing frame 16 when the engine compartment opening / closing cover 12 is disposed on the building cover 11 in a state in which the opening 11c is closed. The shape is abuttable. As shown in FIGS. 4 and 9, the guide bracket 18 includes an upper surface portion 18 a that is welded and fixed to the back surface of the engine compartment opening / closing cover 12. In addition, the guide groove 18b1 is connected to one side end of the upper surface portion 18a and guides the tip 17a of the stay 17 during the opening / closing operation of the engine compartment opening / closing cover 12, and is connected to the guide groove 18b1. The engine compartment opening / closing cover 12 has one side surface portion 18b having a locking groove 18b2 for locking the tip end portion 17a of the stay 17 when the opening portion 11c is opened. The guide bracket 18 has the other side surface portion 18c that is connected to the other side end portion of the upper surface portion 18a and is disposed so as to face the one side surface portion 18b. Further, the guide bracket 18 is connected to the lower end of the other side surface portion 18c, and the upper surface of the reinforcing frame 16 is disposed when the engine compartment opening / closing cover 12 is disposed on the building cover 11 with the opening portion 11c closed. It has a flat portion 18d that can come into contact with the portion 16a. The guide bracket 18 is made of one steel material.

  In this embodiment, as shown in FIGS. 6, 7, etc., a bracket 19 is welded and fixed to the back surface of the engine compartment opening / closing cover 12, and an engaging claw 19 a is provided on the bracket 19. Further, for example, the bracket 20 is fixed to the reinforcing frame 16 by welding, and the bracket 20 is provided with an engagement hole 20a in which the above-described engagement claw 19a can be engaged.

  In this embodiment configured as described above, when the engine compartment opening / closing cover 12 is opened by gripping the handle 12a, the stay 17 is rotated as shown in FIGS. Guided by the guide groove 18b1 of the bracket 18 and locked by the locking groove 18b2, the engine compartment opening / closing cover 12 can be held open. Thus, maintenance and inspection work such as engine oil replenishment work can be performed through the opening 11c.

  Further, the tip 17a of the stay 17 is detached from the locking groove 18b2 of the guide bracket 18 and the engine compartment opening / closing cover 12 is rotated in the direction to close the opening 11c, and the engaging claw 19a of the bracket 19 is engaged with the bracket 20. With the rubber 12e of the engine compartment opening / closing cover 12 placed on the building cover 11 so as to be engaged with the joint hole 20a, the operator gets on the engine compartment opening / closing cover 12 and opens and closes the heat exchanger. By gripping and opening the handle 10a of the cover 10 and taking out the dust-proof net of the heat exchanger 9, the dust-proof net can be cleaned.

  According to the present embodiment configured as described above, when the opening 11c of the building cover 11 is closed by the engine room opening / closing cover 12, the second building frame 14b and the third building frame 14b are extended so as to cross the opening 11c. A flat portion 18d of a guide bracket 18 fixed to the back surface of the engine compartment opening / closing cover 12 and guiding the stay 17 can be brought into contact with the reinforcing frame 16 fixed to the building frame 13c. Therefore, when an operator who performs maintenance and inspection of equipment around the engine compartment opening / closing cover 12, such as a dust net of the heat exchanger 9 as described above, gets on the engine compartment opening / closing cover 12, the operator The load is transmitted from the engine compartment opening / closing cover 12 to the second and third building frames 14b and 14c through the guide bracket 18 and the reinforcing frame 16, and further, the turn having sufficient rigidity through the first building frame 14a. It is transmitted to the frame 2a. Accordingly, the engine compartment opening / closing cover 12 is not bent and deformed, that is, sufficient rigidity of the engine compartment opening / closing cover 12 portion can be ensured. Maintenance and inspection work of equipment around the room opening / closing cover 12 can be performed. Therefore, this embodiment improves the efficiency of maintenance and inspection work for equipment around the engine compartment opening / closing cover 12 by carrying out maintenance and inspection operations on the engine compartment opening / closing cover 12. be able to. Further, since the reinforcing frame 16 also serves as a support member for the stay 17, it is possible to suppress an increase in the number of members, and accordingly, it is possible to suppress an increase in manufacturing cost and cost required for member management.

  In the above embodiment, the engine compartment opening / closing cover 12 is provided so as to be rotatable in the front-rear direction of the revolving structure 2, the guide bracket 18 is extended in the front-rear direction of the revolving structure 2, and the stay 17 is disposed in the front-rear direction of the revolving structure 2. Although the reinforcing frame 16 is provided so as to extend in the front-rear direction of the revolving structure 2, the present invention is not limited to such a configuration. For example, the engine compartment opening / closing cover 12 is provided so as to be rotatable in the left-right direction of the revolving structure 2, the guide bracket 18 is extended in the left-right direction of the revolving structure 2, and the stay 17 is rotatable in the left-right direction of the revolving structure 2. The reinforcing frame 16 may be provided so as to extend in the left-right direction of the revolving structure 2.

DESCRIPTION OF SYMBOLS 1 Traveling body 2 Revolving body 2a Revolving frame 3 Working apparatus 6 Engine room 8 Fuel tank 9 Heat exchanger 10 Heat exchanger opening / closing cover 11 Building cover 11c Opening part 12 Engine room opening / closing cover 14a 1st building frame 14b 2nd building frame 14c Third building frame 15 Hinge portion 16 Reinforcement frame 16a Upper surface portion 16b Side surface portion 17 Stay 17a Tip portion 18 Guide bracket 18a Upper surface portion 18b One side surface portion 18b1 Guide groove 18b2 Locking groove 18c Other side surface portion 18d Flat portion

Claims (5)

A working device, a revolving body to which the working device is attached, an engine room disposed on the revolving body, a building cover made of a steel plate and covering the engine room, and a building frame made of a steel material to which the building cover is fixed And an opening for maintenance and inspection formed in the upper part of the building cover, and an engine room opening / closing cover attached to the building frame so as to be able to open and close the opening so as to be openable and closable.
A stay made of a steel rod-like body provided so as to be pivotable in the vertical direction and capable of holding the engine compartment opening / closing cover with the opening open, and fixed to the back surface of the engine compartment opening / closing cover, In a construction machine including a guide bracket made of a steel material that guides the stay along with opening and closing of the chamber opening and closing cover,
Extending across the opening and fixed to the building frame, comprising a reinforcing frame made of steel;
The stay is attached to the reinforcing frame so as to be rotatable in the vertical direction,
The shape of the guide bracket is set so that the engine compartment opening / closing cover is located on the reinforcing frame and can be brought into contact with the reinforcing frame when the engine compartment opening / closing cover is disposed on the building cover with the opening closed. Construction machine characterized by that. The construction machine according to claim 1,
The reinforcing frame is made of a single steel material extending across the central portion of the opening,
The construction machine is characterized in that the guide bracket is made of one steel material capable of coming into contact with the reinforcing frame when the engine compartment opening / closing cover is disposed on the building cover in a state in which the opening is closed. . The construction machine according to claim 2,
The engine compartment opening / closing cover is provided so as to be rotatable in the front-rear direction of the revolving structure,
The reinforcing frame is extended in the front-rear direction of the revolving structure,
A construction machine, wherein the stay is attached so as to be rotatable in the front-rear direction of the revolving structure. The construction machine according to claim 1,
The reinforcing frame has an L-shaped cross section having a side surface portion to which the stay is attached and a flat upper surface portion connected to the upper end of the side surface portion.
The guide bracket is
An upper surface portion fixed to the back surface of the engine compartment opening / closing cover;
A guide groove that is connected to one side end of the upper surface portion and guides the tip of the stay during the opening / closing operation of the engine chamber opening / closing cover, and the engine chamber opening / closing cover that is provided continuously to the guide groove. One side surface having a locking groove for locking the tip of the stay when the opening is opened;
The other side surface portion arranged continuously to the other side end portion of the upper surface portion and arranged to face the one side surface portion;
A flat portion that is connected to the lower end of the other side surface portion and can contact the upper surface portion of the reinforcing frame when the engine compartment opening / closing cover is disposed on the building cover in a state in which the opening portion is closed. Construction machine characterized by having a shape having The construction machine according to claim 4,
A heat exchanger disposed on one side of the revolving structure, and a fuel tank disposed on the other side of the revolving structure,
One end of the reinforcing frame is fixed to the second building frame fixed to the upper end of the first building frame fixed upright on the revolving frame of the revolving structure and extending in the left-right direction of the revolving structure, and the reinforcement The other end of the frame is fixed to a third building frame that is disposed so as to face the second building frame and extends in the left-right direction of the revolving body so as to connect the heat exchanger and the fuel tank. Construction machine characterized by.

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