JP2008247100A - Engine hood mounting structure and construction machine equipped with the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an engine hood mounting structure and a construction machine equipped with the same, capable of reducing a load applied to an engine hood and a hinge portion. <P>SOLUTION: In the mounting structure 20 of the engine hood 21, a hinge 22 of the engine hood 21 is mounted to a portion (mounting seat part 31a) of an exterior frame 31 constituting an engine compartment 6. Also, a lock part 23 for locking opening/closing of the engine hood 21 is mounted on the upper face of the engine compartment 6. Members including in the engine hood 21, such as the hinge 22 and the lock part 23, are mounted on the engine compartment 6 sides all of which are the same vibration system. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an engine hood mounting structure that is mounted so as to cover a part of an engine room that houses a power source such as an engine mounted on a construction machine such as a hydraulic excavator, and a construction machine including the same.

In recent years, in construction machines, in order to block noise generated from a power chamber including a power source, a structure in which a power chamber storing these components is covered with an exterior cover is generally used.
On the other hand, the power source in the power chamber covered by the exterior cover needs to be regularly maintained and inspected, and may require urgent maintenance. In this case, for example, it is very inefficient to perform the work by removing the exterior cover fixed to the frame by fastening members such as bolts and nuts each time, and there is a possibility that the operator may be burdened.

Therefore, even when the maintenance of the equipment stored in the power room becomes necessary, it is attached to cover the upper surface of the exterior cover so that the maintenance inside the exterior cover can be easily performed. An open / close structure for the engine hood has been proposed.
For example, Patent Document 1 discloses an engine hood mounting structure that opens and closes an engine hood via a hinge that is rotatable about an axis that is disposed along a horizontal direction.
JP 2006-056326 A (published March 2, 2006)

However, the conventional engine hood mounting structure has the following problems.
That is, in the engine hood mounting structure disclosed in the above publication, the engine hood is mounted so as to straddle different vibration systems on the exterior cover side and the counterweight side. There is a risk of load.

  An object of the present invention is to provide an engine hood mounting structure capable of reducing the load applied to the engine hood and the hinge portion, and a construction machine including the same.

  An engine hood mounting structure according to a first aspect of the present invention is an engine hood mounting structure that covers an upper part of an engine room of a construction machine equipped with a counterweight, and includes an engine hood, a hinge, and a lock portion. Yes. The engine hood is opened and closed in the front-rear direction with the counterweight side as a rotation axis. The hinge is an end on the counterweight side, is attached to a member of the same vibration system as the engine room, and is configured to include a rotation shaft for opening and closing the engine hood. The lock portion is disposed at the end of the engine hood opposite to the hinge, and fixes the engine hood to the engine room side.

  Here, for example, in a construction machine with a counterweight mounted behind the vehicle body, such as a hydraulic excavator or a wheel loader, an engine hood that is attached so as to cover the upper surface of an engine room that houses a power source such as an engine, Open and close in direction. Further, a hinge serving as a rotation shaft for opening and closing the engine hood is attached to the counterweight side in a frame or the like constituting the engine room. Further, a lock portion for fixing the engine hood to the upper surface on the engine room side when the engine hood is closed is provided on the side opposite to the hinge side. And this hinge and the lock | rock part are attached with respect to the vibration system member same as an engine room.

Here, the vibration system member that is the same as the engine room includes a frame and an exterior cover that constitute the engine room, and does not include another vibration system member such as a counterweight.
As a result, the engine hood has the same vibration system member together with the hinge and lock part even when vibration is generated by a power source such as an engine housed in the engine room or by vibration applied to the work machine during work. Therefore, the load applied to the hinge, the lock part, and the engine hood itself can be reduced. As a result, it is possible to effectively prevent deformation and breakage in the engine hood, hinge, and lock portion.

An engine hood mounting structure according to a second aspect of the present invention is the engine hood mounting structure according to the first aspect of the present invention, further comprising an exterior frame that covers the engine room. The hinge is attached to the exterior frame.
Here, a hinge is attached to the exterior frame constituting the engine room.

  Thereby, the hinge of the engine hood attached so that the upper surface of an engine room may be covered can be attached with respect to the vibration system member same as an engine room. As a result, it is possible to reduce the load applied to the engine hood itself, the hinge, and the lock portion, and prevent the hinge and the like from being deformed or damaged.

An engine hood mounting structure according to a third aspect of the present invention is the engine hood mounting structure according to the second aspect of the present invention, wherein the hinge is attached to an extension provided in the exterior frame.
Here, the hinge of the engine hood is attached to an extension formed by extending the exterior frame from the conventional one.
Thereby, an engine hood, a hinge, and a lock | rock part can be attached to the engine room side which is the same vibration system member by attaching a hinge with respect to some exterior frames which comprise an engine room. As a result, it is possible to reduce the load applied to the engine hood, the hinge, and the lock portion due to the vibration of the vehicle body.

An engine hood attachment structure according to a fourth aspect of the present invention is the engine hood attachment structure according to the second or third aspect of the present invention, wherein the hinge is attached to an extension portion provided in the exterior frame.
Here, the hinge of the engine hood is attached to an extension portion formed by adding a part of the exterior frame to the conventional one.

  Thereby, an engine hood, a hinge, and a lock | rock part can be attached to the engine room side which is the same vibration system member by attaching a hinge with respect to some exterior frames which comprise an engine room. As a result, it is possible to reduce the load applied to the engine hood, the hinge, and the lock portion due to the vibration of the vehicle body.

A construction machine according to a fifth aspect includes the engine hood mounting structure according to any one of the first to fourth aspects, a counterweight, and an engine room.
Here, the present invention is specified as a construction machine adopting the above-described engine hood mounting structure.
As a result, for example, in a construction machine such as a hydraulic excavator or a wheel loader, particularly a medium-sized or larger construction machine, the load on the lock side or the hinge side of the engine hood can be reduced even when vibration occurs in the vehicle body. As a result, it is possible to prevent deformation and breakage of the engine hood, hinge, and lock part.

A construction machine according to a sixth invention is the construction machine according to the fifth invention, wherein the counterweight is disposed so as not to overlap in a plan view with respect to the cab mounted on the construction machine and the engine room. ing. Further, the cab, engine room, and counterweight are arranged in this order from the front.
Here, as a construction machine on which the engine hood mounting structure of the present invention is mounted, for example, the configuration of a medium-sized hydraulic excavator or the like of 6 t or more is specified by the arrangement of the cab, the engine room, and the counterweight.

Here, “the cab, the engine room and the counterweight do not overlap in plan view” means a construction machine in which the cab is arranged above the engine room as seen in a relatively small construction machine. Means excluded.
This effectively reduces the amount of load on the hinges, locks, and engine hood itself, especially in engine hood mounting structures that are mounted on medium-sized or larger construction machines that are prone to large body vibrations. Can do.

A construction machine according to a seventh invention is the construction machine according to the fifth or sixth invention, wherein the counterweight and the engine room are respectively mounted on the main frame arranged along the front-rear direction of the construction machine. Has been.
Here, the engine room in which the engine hood is attached to the upper surface and the counterweight arranged at the rear of the vehicle body are attached so as to be placed on the main frame.

Here, when vibration occurs in the engine room, or when vibration occurs due to an impact applied to the work machine or the like, the counterweight serving as another vibration system member is also passed through the main frame. Vibration is transmitted.
As a result, the engine hood and its hinges and locks are not attached to the counterweight, which is a separate vibration system member from the engine room, greatly increasing the load on the engine hood, hinges and locks. Can be reduced.

A construction machine according to an eighth aspect is the construction machine according to any one of the fifth to seventh aspects, wherein the counterweight has a notch on the side adjacent to the engine room.
Here, the counterweight has a notch at the end on the engine room side.
Here, the notch includes a recess formed in a part of the counterweight in the width direction.

  Thereby, when the counterweight is mounted on the rear side of the vehicle body, it is possible to avoid the interference between the hinge portion, which is the mounting portion of the engine hood, and the counterweight. As a result, it is possible to improve workability and assembling performance when the counterweight is mounted.

A construction machine according to a ninth invention is the construction machine according to the eighth invention, and pipes installed in the engine room are arranged in the notch.
Here, the notch formed at the end of the counterweight on the engine room side is used as a piping space.
Here, the pipes that pass through the notch include aftercooler pipes, fuel pipes, urea water pipes, and the like that exist in the engine room.
Thereby, the structure in an engine room can be arrange | positioned more efficiently by utilizing the notch part of the counterweight formed for the assembly property improvement as piping space.

  According to the mounting structure of the engine hood according to the present invention, even when vibration due to a power source such as an engine housed in the engine room or vibration due to an impact applied to the work machine during work occurs, the hinge or lock The load on the engine hood itself can be reduced.

A hydraulic excavator (construction machine) 1 equipped with an engine hood mounting structure according to an embodiment of the present invention will be described below with reference to FIGS.
[Configuration of hydraulic excavator 1 as a whole]
As shown in FIG. 1, a hydraulic excavator 1 according to the present embodiment includes a lower traveling body 2, a swivel base 3, a work implement 4, a counterweight 5, an engine room 6, an equipment room 9, and a cab 10. And an attachment structure 20 for the engine hood 21 and a main frame 30 (see FIG. 4).

The lower traveling body 2 has the crawler belt P wound around the left and right ends of the traveling direction rotated to move the excavator 1 forward and backward, and the swivel base 3 is mounted on the upper surface side in a swingable state. .
The swivel base 3 can be swung in any direction on the lower traveling body 2 and has a work machine 4, a counterweight 5, an engine room 6, and a cab 10 mounted on the upper surface.

  The work machine 4 is configured to include a boom 11, an arm 12 attached to the tip of the boom 11, and a bucket 13 attached to the tip of the arm 12. The work machine 4 is a civil engine that excavates earth and sand and gravel while moving the boom 11, the arm 12, the bucket 13 and the like up and down by the hydraulic cylinders 11a, 12a and 13a included in a hydraulic circuit (not shown). Work at the construction site.

  The counterweight 5 is made of, for example, scrap iron or concrete in a box formed by assembling steel plates and is hardened. The counterweight 5 is an engine room 6 on the swivel 3 for balancing the vehicle body during mining. It is provided behind. Further, as shown in FIG. 9, the counterweight 5 is included in the main frame 30 and is placed on the placement portion 30 aa installed at the rear end portion of the pair of I-type frames 30 a arranged along the front-rear direction. It is installed. Further, as shown in FIG. 4, the counterweight 5 has a cutout (cutout portion) 5 a at a substantially central portion in the left-right direction on the surface adjacent to the engine room 6. As shown in FIGS. 10 and 11, the notch 5 a is provided with a pipe P <b> 1 of the aftercooler 32 disposed in the engine room 6. Thus, by using the notch 5a formed in the counterweight 5 as a piping space, the configuration in the engine room 6 can be efficiently arranged.

  As shown in FIGS. 4 and 5, the engine room 6 is disposed at the rear end portion of the swivel base 3 on the main frame 30 so as to be adjacent to the counterweight 5. Further, as shown in FIG. 9, the engine room 6 is surrounded by an exterior frame 31 including a pair of I-shaped frames 30a and 30a, four leg frames 41a to 41d, and four beam frames 42a to 42d. A portion is formed, and a storage space for the engine 6a and the like is formed inside. The engine room 6 includes an engine 6a (see FIG. 3), an aftercooler 32 (see FIGS. 10 and 11), which are power sources for driving the lower traveling body 2 and the work implement 4, and the like in an internal storage space. Stored. Further, as shown in FIG. 9, the engine room 6 is attached to the main frame 30 by standing upright four leg frames 41 a to 41 d. That is, the engine room 6 and the counterweight 5 are arranged adjacent to each other, but are not directly attached to each other and are connected to each other via the main frame 30. For this reason, when the engine room 6 and the counterweight 5 vibrate due to vibrations of the engine 6a in the engine room 6 or an impact from the work machine 4 or the like, they function as separate vibration systems. Further, as shown in FIGS. 2 and 3, the engine room 6 has an opening for maintenance on the upper surface, and this opening is opened by an engine hood 21 that can be opened and closed via a hinge 22 except during maintenance. Covering.

The equipment room 9 is disposed behind the work machine 4 and houses a fuel tank, a hydraulic oil tank, an operation valve, and the like (not shown).
The cab 10 is a driver's cab in which an operator of the excavator 1 gets on and off, and is disposed on the left front side on the swivel 3 so that the tip of the work machine 4 can be seen. .

As shown in FIGS. 2 and 3, the mounting structure 20 for the engine hood 21 is a mounting structure for mounting the engine hood 21 on the engine room 6 so as to cover a part of the upper surface of the engine room 6. The hinge 22 and the lock part 23 are included. The configuration of the engine hood 21 and the mounting structure 20 will be described in detail later.
As shown in FIG. 4, the main frame 30 is a frame that constitutes a bottom portion of the swivel base 3, and an engine room 6, a counterweight 5, and the like are mounted thereon. The mounting of the engine room 6 and the counterweight 5 on the main frame 30 will be described in detail later.

Here, in the hydraulic excavator 1 of the present embodiment, the cab 10, the engine room 6, and the counterweight 5 of the above-described configuration are not overlapped in a plan view as shown in FIG. They are arranged in order. Such an arrangement is found, for example, in medium-sized hydraulic excavators of 6t class or higher.
(Configuration of engine hood 21)
As shown in FIGS. 2 and 3, the engine hood 21 is a substantially box-shaped lid member that is opened and closed during maintenance or the like in the engine room 6, and rotates the hinge 22 attached to the counterweight 5 side. It opens and closes in the front-rear direction as the center of movement. For this reason, it is preferable that the engine hood 21 is configured to be as large as possible in order to increase the opening and improve the maintainability. Further, the engine hood 21 is attached so as to cover a part of the upper surface of the engine room 6 disposed so as to be sandwiched between the cab 10 and the counterweight 5 in the front-rear direction in the closed state. As shown in FIGS. 3 and 6 to 8, the engine hood 21 includes a hinge 22 attached to an end portion on the counterweight 5 side, a lock portion 23 attached to an end portion on the cab 10 side, And a handle 24.

  As shown in FIG. 8, the hinge 22 is configured to include two pedestals 22 b and 22 c that are rotatable with respect to the rotation shaft 22 a. Then, one pedestal 22c of the hinge 22 is attached to a mounting seat (additional portion) 31a of the exterior frame 31 disposed above the notch 5a formed on the surface of the counterweight 5 on the engine room 6 side. It is done. The other pedestal 22 b of the hinge 22 is attached to the surface of the engine hood 21 on the counterweight 5 side. Here, the attachment position of the hinge 22 is a boundary portion with the counterweight 5 in the exterior frame 31 constituting the engine room 6. This is because the upper surface opening of the engine room 6 and the engine hood 21 covering the engine room 6 are designed to be as large as possible in order to improve maintainability in the engine room 6.

A pair of lock portions 23 are attached to the surface of the engine hood 21 on the cab 10 side, and when the engine hood 21 is in a closed state (see FIGS. 2 and 6), the lock portion 23 is in an open state (see FIGS. 3 and 7). The engine hood 21 is fixed to the upper surface of the engine room 6 so as not to shift.
The handle 24 is disposed between the pair of lock portions 23 in the engine hood 21 and is used as a handle when the engine hood 21 is opened and closed.

(Configuration of the mounting structure 20 of the engine hood 21)
The attachment structure 20 of the engine hood 21 is configured to include the engine hood 21, the hinge 22, and the lock portion 23 described above.
In this embodiment, as described above, the engine hood 21 attached to cover a part of the upper surface of the engine room 6, the hinge 22 for opening and closing the engine hood 21, and the engine hood 21 are in a closed state. In this case, the lock portion 23 that restricts the transition to the open state is fixed to the exterior frame 31 (mounting seat portion 31a) of the engine room 6 that is the same vibration system. That is, the hinge 22 of the engine hood 21 is not connected to the counterweight 5 side that is a vibration system different from the engine room 6, and all the members included in the engine hood 21 are connected to the engine room 6 side. ing.

Specifically, the difference between the vibration systems can be expressed by the ratio (difference) of gravitational acceleration when the excavator 1 gets over an obstacle.
That is, when the obstacles are overcome by the crawler belts P on both sides at the same time, the exterior frame 31 vibrates with respect to the counterweight 5 with a gravitational acceleration of about 2.2 to 2.3 times. When the obstacle is simultaneously climbed by the crawler belt P on one side, the exterior frame 31 vibrates with respect to the counterweight 5 with a gravitational acceleration of about 2.7 to 2.8 times.

Thus, due to the structural characteristics of the rear portion of the hydraulic excavator 1, a large difference in gravitational acceleration occurs between the exterior frame 31 of the engine room 6 and the counterweight 5.
As a result, in the excavator 1, even when vibration due to vibration of the engine 6 a in the engine room 6 or shock to the work implement 4 occurs, the engine hood 21 is not mounted across different vibration systems. In addition, the load on the engine hood 21 and the hinge 22 can be reduced. As a result, deformation and breakage of the engine hood 21, the hinge 22, the lock portion 23, and the like can be prevented.

[Features of the mounting structure 20 of the engine hood 21]
(1)
In the mounting structure 20 of the engine hood 21 of the present embodiment, as shown in FIG. 8, the hinge 22 of the engine hood 21 is attached to a part (mounting seat portion 31 a) of the exterior frame 31 constituting the engine room 6. Yes. And the lock part 23 which locks opening and closing of the engine hood 21 is also attached with respect to the upper surface of the engine room 6, as shown in FIG. That is, the members such as the hinge 22 and the lock portion 23 included in the engine hood 21 are all attached to the engine room 6 side that is the same vibration system.

  As a result, when the vibration of the engine 6a housed in the engine room 6 or the vibration caused by the impact applied to the work implement 4 is generated, the engine hood 21 is as large as possible in consideration of maintainability and the like. Even if it is designed, it is not mounted across different vibration systems such as the counterweight 5 or the like. For this reason, the load concerning engine hood 21, hinge 22, etc. can be reduced more effectively than before. As a result, it is possible to effectively prevent the occurrence of problems such as deformation of the engine hood 21 and damage to the hinge 22 portion.

(2)
In the attachment structure 20 of the engine hood 21 of the present embodiment, the hinge 22 of the engine hood 21 is attached to the exterior frame 31 that forms the outline of the engine room 6, as shown in FIG.
Thereby, the engine hood 21, the hinge 22 and the lock part 23 can be fixed to the common vibration system of the engine room 6. Therefore, it is possible to reduce the load applied to the hinge 22 and the like when vibration is generated, and to prevent the deformation and breakage of the load.

(3)
In the hydraulic excavator 1 of the present embodiment, as shown in FIG. 8, the hinge 22 of the engine hood 21 is attached to a mounting seat portion 31 a provided with an additional exterior frame 31.
As a result, the hinge 22 attached to the mounting seat portion 31a coupled to the exterior frame 31 becomes the same vibration system member as the exterior frame 31, so that the load applied to the engine hood 21, the hinge 22 and the like is effectively reduced. Can be reduced.

(4)
As shown in FIG. 1, the hydraulic excavator 1 according to the present embodiment includes an engine hood 21 mounting structure 20 described above, a counterweight 5 placed on a rear end portion of a main frame 30, and an exterior frame 31. The engine room 6 is configured to be included.
Thereby, even when vibration occurs in the hydraulic excavator 1, the load applied to the engine hood 21, the hinge 22 and the like can be reduced, and the deformation and breakage of the engine hood 21 and the like can be effectively prevented.

(5)
In the hydraulic excavator 1 of the present embodiment, as shown in FIG. 5 and the like, the cab 10, the engine room 6, and the counterweight 5 are arranged in this order from the front so as not to overlap in a plan view.
Here, the arrangement in which the cab 10, the engine room 6, and the counterweight 5 do not overlap in a plan view is, for example, a configuration unique to a relatively large hydraulic excavator 1 that is 6t or larger.

As a result, even if vibration occurs in the hydraulic excavator 1 of a medium-sized machine or more that is likely to generate relatively large vibration due to the output of the engine 6a and the power of the work machine 4 being increased, the engine hood 21 and its hinge It is possible to reduce the load applied to 22 etc. and prevent these deformations and breakage.
(6)
In the excavator 1 of the present embodiment, as shown in FIGS. 4 and 9, the counterweight 5 and the engine room 6 are separately mounted on the main frame 30.

  Thereby, the counterweight 5 and the engine room 6 function as separate vibration systems. However, the hinge 22 and the like of the engine hood 21 are not attached to the counterweight 5 side. For this reason, even when the vehicle body of the hydraulic excavator 1 vibrates, the load applied to the engine hood 21 and the hinge 22 can be reduced, and deformation and breakage of the engine hood 21 and the like can be prevented.

(7)
In the hydraulic excavator 1 of the present embodiment, as shown in FIGS. 4 and 8, a notch 5 a is provided in a part of the surface of the counterweight 5 on the engine room 6 side.
Here, the hinge 22 of the engine hood 21 described above is attached to a portion of the engine room 6 at the border with the counterweight 5 so that the engine hood 21 can be opened and closed in the front-rear direction and is as large as possible. . For this reason, when the hydraulic excavator 1 is assembled, when the counterweight 5 is finally placed on the rear part of the vehicle body, the hinge 22 may interfere with the counterweight 5 and workability during assembly may be reduced. .

For this reason, by providing the notch 5a in the portion corresponding to the attachment location of the hinge 22 on the counterweight 5 side, it is possible to prevent mutual interference when the counterweight 5 is placed on the rearmost part of the main frame 30, Assemblability can be improved.
(8)
In the hydraulic excavator 1 of this embodiment, as shown in FIGS. 8, 10, and 11, the excavator 1 is installed in the engine room 6 in the space of the notch 5 a formed on the surface of the counterweight 5 on the engine room 6 side. The piping P1 of the aftercooler 32 is arranged.

Thereby, the notch 5a of the counterweight 5 formed for preventing interference with the hinge 22 and the like when the counterweight 5 is mounted can be used as a space for the pipe P1. As a result, the engine 6a and the like housed in the engine room 6 can be efficiently arranged.
[Other Embodiments]
As mentioned above, although one Embodiment of this invention was described, this invention is not limited to the said embodiment, A various change is possible in the range which does not deviate from the summary of invention.

(A)
In the said embodiment, the hinge 22 was demonstrated and demonstrated with the example fixed with respect to the attachment seat surface 31a as an additional part of the exterior frame 31. As shown in FIG. However, the present invention is not limited to this.
For example, as shown in FIG. 12, instead of the additional portion of the exterior frame, one pedestal 22c of the hinge 22 may be attached to an extension portion 31b obtained by extending a part of the exterior frame.

  Even in this case, the hinge 22 can be attached to the end of the counterweight 5 on the engine room 6 without increasing the number of parts, so the hinge 22 and the lock portion 23 of the engine hood 21 are a common vibration source. It can be installed on the engine room 6 (the exterior frame 31 constituting the engine room 6). As a result, even when the vehicle body of the construction machine vibrates, it is possible to obtain the same effect as described above that the load applied to the engine hood 21, the hinge 22, the lock portion 23, and the like can be reduced.

(B)
In the above embodiment, the example in which the hinge 22 is fixed to a part of the exterior frame 31 has been described. However, the present invention is not limited to this.
For example, the hinge may be attached to a member other than the exterior frame constituting the engine room.

Even in this case, as long as the vibration system member is the same as the engine room, the load on the engine hood can be reduced.
(C)
In the above embodiment, the example in which the pipe P1 for the aftercooler 32 is disposed in the notch 5a formed on a part of the counterweight 5 on the side adjacent to the engine room 6 has been described. However, the present invention is not limited to this.

For example, as shown in FIG. 13, in order to reduce and purify nitrogen oxides in the exhaust gas of the engine using a liquid reducing agent such as urea water or the like, the rearmost end on the counterweight 5 side in the engine room 6 You may make it arrange | position the piping P2 connected to the urea water tank 50 arrange | positioned.
Or you may arrange | position the piping P1 of the aftercooler 32 mentioned above and the piping P2 of the urea water tank 50 in the notch part of a counterweight, respectively.

Even in this case, the notch 5a of the counterweight 5 formed for preventing interference with a hinge or the like when the counterweight 5 is mounted is also used as a space for the pipes P1 and P2, so that the engine room 6 can be used. The engine 6a and the like to be stored can be efficiently arranged.
(D)
In the above embodiment, an example in which the notch 5a is provided in a part of the counter weight 5 adjacent to the engine room 6 as a space for preventing interference when the counter weight 5 is mounted and as a space for installing a pipe is given. Explained. However, the present invention is not limited to this.

For example, the notch 5a may be formed in a groove shape along the entire width direction of the counterweight, or may be a hole formed near the center in the height direction of the counterweight. There may be.
(E)
In the said embodiment, the example which applied this invention to the hydraulic excavator 1 more than 6t or more medium sized machines was given and demonstrated. However, the present invention is not limited to this.

For example, the present invention is naturally applicable not only to medium-sized machines and large-sized machines but also to small hydraulic excavators and the like.
However, in consideration of the magnitude of vibration generated in the vehicle body and the like, it can be made more effective by being applied to medium-sized machines or more, as in the above embodiment. It is preferable that the present invention is applied to other construction machines.

(F)
In the said embodiment, the hydraulic excavator 1 was mentioned as an example and demonstrated as a construction machine to which the attachment structure 20 of the engine hood 21 of this invention is applied. However, the present invention is not limited to this.
For example, in addition to a hydraulic excavator, as shown in FIG. 14, the present invention can be similarly applied to an engine room 111 of a wheel loader (construction machine) 100 that is mounted with a cab 120 and a counterweight 130 and travels by drive wheels 114. It is.

  Even when the present invention is applied to a wheel loader, it is more effective to be applied to a medium-sized machine or more having a large vibration compared to a small machine, similarly to a hydraulic excavator.

  The mounting structure of the engine hood of the present invention is such that even if vibrations due to a power source such as an engine housed in an engine room or vibrations due to an impact applied to a work machine during work occur, the hinge, the lock part, the engine Since the load on the hood itself can be reduced, the present invention can be widely applied to various construction machines having an engine hood opening / closing mechanism.

The perspective view which shows the structure of the external appearance of the hydraulic shovel which employ | adopted the attachment structure of the engine hood which concerns on one Embodiment of this invention. FIG. 2 is a perspective view showing a configuration around an engine room and a counterweight including a mounting structure of an engine hood mounted on the rear side of the hydraulic excavator in FIG. 1. The perspective view which shows the open state of the engine hood attached to the upper surface of the engine room of FIG. FIG. 2 is an exploded perspective view showing a main frame included in the hydraulic excavator of FIG. 1 and a counterweight placed on the rear end thereof. FIG. 3 is a plan view showing a configuration around an engine room and a counterweight in FIG. 2 and the like. The side view which shows the structure of the periphery including the attachment structure of the engine hood attached to the upper surface of the engine room of FIG. The side view which shows the opening-and-closing state of the engine hood of FIG. The enlarged view which shows the structure of the attachment structure of the engine hood included in FIG. 6 and FIG. The side view which shows the attachment part to the main frame of the counterweight and engine room contained in FIG. The side view which shows the structure in the engine room contained in FIG.2 and FIG.3 etc. FIG. The top view which shows the structure in the engine room of FIG. The enlarged view which shows the structure of the attachment structure periphery of the engine hood which concerns on other embodiment of this invention. The perspective view which shows the structure in the engine room of the hydraulic excavator which concerns on further another embodiment of this invention. The side view which shows the structure of the wheel loader which concerns on further another embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Hydraulic excavator 2 Lower traveling body 3 Swivel stand 4 Working machine 5 Counterweight 5a Notch (notch part)
6 Engine room 6a Engine 9 Equipment room 10 Cab 11 Boom 11a Boom cylinder 12 Arm 12a Arm cylinder 13 Bucket 13a Bucket cylinder 20 Engine hood mounting structure 21 Engine hood 22 Hinge 22a Rotating shaft 22b Base 22c Base 23 Lock part 24 Handle 30 Main frame 30a I-type frame 30aa Mounting portion 31 Exterior frame 31a Mounting seat (additional portion)
31b Extension part 32 After cooler 41a-41d Leg part frame 42a-42d Beam part frame 100 Wheel loader (construction machine)
111 Engine Room 114 Drive Wheel 120 Cab 130 Counter Weight P1 Piping (Aftercooler Piping)
P2 piping (urea water tank piping)

Claims (9)

An engine hood mounting structure that covers the upper part of the engine room of a construction machine equipped with a counterweight,
An engine hood that is opened and closed in the front-rear direction with the counterweight side as a rotation axis;
A hinge including a pivot shaft for opening and closing the engine hood, which is an end on the counterweight side and is attached to a member of the same vibration system as the engine room;
The engine hood is disposed at an end opposite to the hinge, and a lock portion for fixing the engine hood to the engine room side;
Engine hood mounting structure equipped with. It further includes an exterior frame that covers the engine room,
The hinge is attached to the exterior frame;
The engine hood mounting structure according to claim 1. The hinge is attached to an extension provided in the exterior frame.
The engine hood mounting structure according to claim 2. The hinge is attached to an additional portion provided in the exterior frame,
The engine hood mounting structure according to claim 2 or 3. The engine hood mounting structure according to any one of claims 1 to 4,
The counterweight;
The engine room;
Construction machinery equipped with. The counterweight is arranged from the front in order of the cab, the engine room, and the counterweight so as not to overlap in a plan view with respect to the cab mounted on the construction machine and the engine room.
The construction machine according to claim 5. The counterweight and the engine room are respectively mounted on a main frame arranged along the front-rear direction of the construction machine.
The construction machine according to claim 5 or 6. The counterweight has a notch on the side adjacent to the engine room,
The construction machine according to any one of claims 5 to 7. Pipings installed in the engine room are arranged in the notch,
The construction machine according to claim 8.

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