JP5729244B2 - Construction machinery - Google Patents

Description

  The present invention relates to a construction machine.

  Conventionally, a construction machine including a lower traveling body, an upper swing body mounted on the lower traveling body, and an engine mounted on the upper swing body is known (for example, see Patent Documents 1 and 2). . The engine is covered with a machine room cover. The engine exhaust pipe protrudes and extends from a through hole formed in the upper surface of the machine room cover. Then, the exhaust gas is exhausted to the outside of the machine room cover by bending the tip of the exhaust pipe to the side of the vehicle or the rear of the vehicle.

  Here, in a state where the through hole is exposed, rainwater enters the machine room cover, and therefore it is preferable to close the through hole. For example, it is conceivable to provide an exhaust pipe cover that covers the periphery of the exhaust pipe and closes the through hole, and exhausts the exhaust gas by projecting only the tip of the exhaust pipe from the exhaust pipe cover.

JP 2002-317631 A JP 2006-266040 A

  However, in the configuration in which the tip of the exhaust pipe is bent to the side of the vehicle or the rear of the vehicle, there is a problem that the exhaust pipe and the exhaust pipe cover interfere when the exhaust pipe cover is assembled to the machine room cover.

  Specifically, when the exhaust pipe cover is assembled to the machine room cover, the exhaust pipe cover is moved to the position just above the exhaust pipe while being suspended by a crane, and the exhaust pipe cover is gradually lowered to the exhaust pipe. I try to cover it. However, if the tip of the exhaust pipe is bent, the tip of the exhaust pipe and the side wall of the exhaust pipe cover overlap each other in plan view, and thus the exhaust pipe cover cannot be covered from directly above.

  Here, if a configuration is provided in which a slight gap is provided in a plan view between the side wall of the exhaust pipe cover and the tip of the exhaust pipe, the exhaust pipe and the exhaust pipe are covered when the exhaust pipe cover is placed directly above the exhaust pipe. There is no interference with the tube cover. However, in this case, there is a problem that a part of the exhaust gas exhausted from the exhaust pipe leaks into the exhaust pipe cover from this gap.

  The present invention has been made in view of such a point, and an object of the present invention is to cover the exhaust pipe cover from right above the exhaust pipe and to assemble the exhaust pipe cover. It is to prevent the exhaust gas from leaking into the exhaust pipe cover by eliminating the gap.

  The present invention is directed to a construction machine including a lower traveling body, an upper swing body mounted on the lower travel body, and an engine mounted on the upper swing body, and the following solution is taken. It was.

That is, the first invention is a machine room cover that covers the periphery of the engine and has an upper surface formed with an insertion hole through which the exhaust pipe of the engine is inserted.
An exhaust pipe cover that bulges upward and covers the insertion hole so as to cover the periphery of the exhaust pipe,
An exhaust hole is formed in the side wall of the exhaust pipe cover,
The side wall in which the exhaust hole is formed is inclined obliquely outwardly downward,
The tip of the exhaust pipe extends toward the side wall of the exhaust pipe cover and is inserted through the exhaust hole, thereby projecting to the outside of the exhaust pipe cover,
The exhaust hole is formed in a size such that a protruding portion of the exhaust pipe is located in the exhaust hole in plan view ,
The exhaust pipe cover is provided with a cylindrical exhaust duct extending outward from the peripheral edge of the exhaust hole .

  In the first invention, the engine is covered with a machine room cover. An insertion hole is formed in the upper surface of the machine room cover, and the exhaust pipe of the engine is inserted therethrough. The periphery of the exhaust pipe is covered with an exhaust pipe cover that bulges upward. The insertion hole is closed with an exhaust pipe cover. An exhaust hole is formed in the side wall of the exhaust pipe cover. The side wall in which the exhaust hole is formed is inclined obliquely outwardly downward. The distal end portion of the exhaust pipe extends toward the side wall of the exhaust pipe cover, is inserted into the exhaust hole, and protrudes outside the exhaust pipe cover. The exhaust hole is formed in such a size that the protruding portion of the exhaust pipe is located in the exhaust hole in plan view.

  With such a configuration, the exhaust pipe cover can be assembled from directly above the exhaust pipe, and the gap between the tip of the exhaust pipe and the side wall of the exhaust pipe cover is eliminated, so that the exhaust gas is contained in the exhaust pipe cover. It is possible to prevent leakage.

  Specifically, if the tip of the exhaust pipe is bent, the tip of the exhaust pipe and the side wall of the exhaust pipe cover overlap in plan view, and thus the exhaust pipe cover cannot be covered from directly above. Here, if a slight gap is provided in a plan view between the side wall of the exhaust pipe cover and the tip of the exhaust pipe, the exhaust pipe and the exhaust pipe cover do not interfere with each other. However, in this case, a part of the exhaust gas exhausted from the exhaust pipe leaks into the exhaust pipe cover from this gap.

  On the other hand, in the present invention, the side wall of the exhaust pipe cover is constituted by an inclined surface inclined obliquely outwardly downward, and an exhaust hole is formed in the inclined surface. The exhaust hole is formed in such a size that the protruding portion of the exhaust pipe is located in the exhaust hole in plan view. As a result, when the exhaust pipe cover is hung by a crane and covered from right above the exhaust pipe, the front end of the exhaust pipe and the exhaust pipe cover are not interfered with each other, and the front end of the exhaust pipe is inserted into the exhaust hole. Can do. Furthermore, since the front end portion of the exhaust pipe protrudes outward from the side wall of the exhaust pipe cover, it is possible to suppress part of the exhaust gas exhausted from the exhaust pipe from leaking into the exhaust pipe cover.

A cylindrical exhaust duct is attached to the exhaust pipe cover. The exhaust duct extends outward from the peripheral edge of the exhaust hole.

  With such a configuration, by configuring the exhaust duct separately from the exhaust pipe cover, for example, the length of the exhaust duct is increased or the mounting angle of the exhaust duct is changed in order to reduce exhaust noise. can do.

According to a second invention, in the first invention,
A surface on the front end side of the exhaust duct is formed as a vertical surface or a surface inclined obliquely downward toward the base end side of the exhaust duct.

In the second invention, the surface on the front end side of the exhaust duct is formed as a vertical surface or a surface inclined obliquely downward toward the base end side of the exhaust duct.

  By adopting such a configuration, it is possible to make it difficult for rainwater to enter the exhaust pipe cover from the front end of the exhaust duct by devising the shape of the front end surface of the exhaust duct.

According to a third invention, in the first or second invention,
A sound absorbing material is provided on the inner peripheral surface of the exhaust duct.

In the third invention, a sound absorbing material is provided on the inner peripheral surface of the exhaust duct. As the sound absorbing material, for example, glass wool is used.

  With such a configuration, when the exhaust gas exhausted from the exhaust pipe passes through the exhaust duct, the exhaust sound is absorbed by the sound absorbing material, and the exhaust sound can be reduced.

According to a fourth invention, in any one of the first to third inventions,
A frame-like raising member attached to the upper surface of the machine room cover and partially raising the machine room cover;
The machine chamber cover is formed with an opening hole that opens along the inner peripheral edge of the raising member, while the insertion hole is formed on the upper surface of the raising member,
The exhaust pipe extends and projects upward from the raising member,
The exhaust pipe cover is attached to the upper surface of the raising member so as to cover the periphery of the exhaust pipe.

In the fourth invention, the raising member is attached to the upper surface of the machine room cover, and is partially raised. The machine room cover is formed with an opening hole that opens along the inner peripheral edge of the raising member. An insertion hole is formed on the upper surface of the raising member. An exhaust pipe protrudes and extends above the raising member. The exhaust pipe cover is attached to the upper surface of the raising member. The periphery of the exhaust pipe is covered with an exhaust pipe cover.

  With such a configuration, when the engine or cooler accommodated in the machine room is large and its upper end protrudes outside the machine room cover, the machine room cover is partially raised by the raising member. By doing so, a large engine, a cooler, etc. can be accommodated.

  Moreover, if an exhaust pipe cover is previously attached to the upper surface of the raising member, the exhaust pipe cover and the raising member can be suspended at a time by a crane, and the number of crane operations can be reduced.

According to a fifth invention, in any one of the first to fourth inventions,
The side wall of the exhaust pipe cover is supported so as to be openable and closable by an open / close shaft extending along an upper edge or a lower edge thereof.

In the fifth invention, an opening / closing shaft is provided on the upper edge or the lower edge of the side wall of the exhaust pipe cover. The side wall of the exhaust pipe cover is supported by an opening / closing shaft so as to be freely opened and closed.

  With such a configuration, it is possible to maintain a device (for example, an exhaust purification device) covered by the exhaust pipe cover by simply opening and closing the exhaust pipe cover. Therefore, it is not necessary to remove the entire exhaust pipe cover when maintaining the equipment, and workability is improved.

  According to the present invention, when the exhaust pipe cover is suspended by a crane and covered from directly above the exhaust pipe, the front end of the exhaust pipe and the exhaust pipe cover do not interfere with each other, and the front end of the exhaust pipe is used as the exhaust hole. It can be inserted. Furthermore, since the front end portion of the exhaust pipe protrudes outward from the side wall of the exhaust pipe cover, it is possible to suppress part of the exhaust gas exhausted from the exhaust pipe from leaking into the exhaust pipe cover.

It is a side view which shows the whole structure of the construction machine which concerns on Embodiment 1 of this invention. It is a top view which shows the whole structure of a construction machine. It is a perspective view which shows the state which opened the bonnet. It is side surface sectional drawing which shows the structure of an exhaust pipe cover. It is side surface sectional drawing which shows the structure of the exhaust pipe cover concerning this Embodiment 2. It is side surface sectional drawing which shows the other structure of an exhaust pipe cover. It is side surface sectional drawing which shows the other structure of an exhaust pipe cover. It is side surface sectional drawing which shows the other structure of an exhaust pipe cover.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. It should be noted that the following description of the preferred embodiment is merely illustrative in nature and is not intended to limit the present invention, its application, or its use.

Embodiment 1
FIG. 1 is a side view showing the overall configuration of a construction machine according to Embodiment 1 of the present invention, and FIG. 2 is a plan view. As shown in FIGS. 1 and 2, the construction machine 10 is a hydraulic excavator in which a swingable upper swing body 2 is mounted on a crawler type lower traveling body 1.

  The upper swing body 2 includes a swing frame 3 as a vehicle body frame, an attachment 4 that is provided on the front end side of the swing frame 3 and performs excavation work such as earth and sand, a cab 5, a machine room 6, and a rear of the swing frame 3. A counterweight 7 is provided on the end side to balance the weight with the attachment 4.

  In this embodiment, in FIG. 1, the side on which the attachment 4 on the left side of the drawing is arranged is the front side of the vehicle, and the side on which the cab 5 on the front side of the paper is arranged is the left side of the vehicle. Shall follow unless otherwise stated. Moreover, in FIG. 2, the description of the lower traveling body 1 and the attachment 4 is omitted.

  The attachment 4 includes a boom 11 rotatably attached to a pair of vertical plates 3a (see FIG. 2) provided on the revolving frame 3 on the base end side, and an arm rotatably attached to the distal end side of the boom 11. 12 and a bucket 13 rotatably attached to the distal end side of the arm 12.

  The cab 5 is a rectangular box type cab equipped with a driving seat, various control devices, operation devices, and the like, and is located on the left side of the front of the upper swing body 2 so as to be adjacent to the left side of the attachment 4. It is arranged.

  The machine room 6 is covered with a machine room cover 6a. On the rear side in the machine room 6, a cooler 19, an engine 20, and an exhaust purification device 21 are sequentially arranged from the left side. The exhaust purification device 21 is connected in the middle of the pipe line of the exhaust pipe 22 of the engine 20 and purifies the exhaust gas.

  A hydraulic oil tank 31 that stores hydraulic oil is disposed on the right side of the attachment 4 in the machine room 6. A fuel tank 32 for storing fuel is disposed on the front side of the hydraulic oil tank 31. On the front side of the fuel tank 32, a trunk room 33 capable of storing equipment and the like is disposed. A step platform 34 is provided at a portion of the revolving frame 3 located in the lower front portion of the trunk room 33 so as to protrude forward. And in order to assist an operator's raising / lowering, the handrail 35 is provided so that it may extend in the front-back direction.

  Here, if the construction machine 10 is a large model, a large output is required. Therefore, the mounted cooler 19, the engine 20, and the like (also referred to as engine-related devices) are also increased in size. As a result, in the construction machine 10, a part of the engine-related equipment protrudes from the upper surface of the machine room cover 6a. Therefore, in the present embodiment, the machine room 6 is partially raised by providing the raising member 51 so as to cover the protruding portion.

  FIG. 3 is a perspective view showing a state where the bonnet is opened. As shown in FIG. 3, a rectangular opening hole 6b extending in the width direction is formed in the rear part of the upper surface of the machine room cover 6a.

  The raising member 51 is configured in a frame shape that is long in the left-right direction by combining a plurality of element members formed by pressing a steel plate. The lower surface of the raising member 51 is opened along the periphery of the opening hole 6b. The raising member 51 is assembled to the machine room cover 6a so as to cover the opening hole 6b, and constitutes a part of the machine room cover 6a.

  A rectangular maintenance hole 51a through which the engine 20 can be visually recognized and an insertion hole 51b through which the exhaust pipe 22 (see FIG. 2) of the engine 20 is inserted are formed on the upper surface of the raising member 51 at intervals in the width direction. Has been. A scaffold member 40 is disposed between the maintenance hole 51a and the insertion hole 51b. The scaffold member 40 is attached to the upper surface of the machine room cover 6a by fastening bolts 41 (see FIG. 2). An inspection hole 51c (see FIG. 2) through which an oil level gauge of engine oil can be visually recognized is formed on the rear side of the vehicle from the scaffold member 40. The inspection hole 51c is closed by the inspection door 45 so as to be freely opened and closed.

  In addition, suspension rings (not shown) to be engaged with the crane are provided at the four corners of the raising member 51. If a lifting ring is used when lifting the lifting member 51 with a crane, the lifting member 51 can be lifted with good balance so as to be horizontal, or can be lowered vertically toward the upper surface of the machine room cover 6a.

  A plurality of tread holes 40 a are formed on the tread of the scaffold member 40. These tread holes 40a are formed by being punched from the back side of the tread, and the periphery of the tread hole 40a protrudes to the front side, as an anti-slip when the operator gets on and off the tread of the scaffold member 40. Function.

  The maintenance hole 51a is closed by a bonnet 52 so as to be opened and closed. The bonnet 52 is a dome-shaped member whose periphery is formed slightly larger than the maintenance hole 51a. The bonnet 52 is supported at the end portion on the maintenance hole 51a side in the longitudinal direction of the raising member 51 through a hinge 52a so as to be opened and closed. The bonnet 52 is provided with a bonnet lock 52b for locking the opening / closing operation.

  The bonnet 52 is supported in an open state by the stay 53. By opening the bonnet 52, a part of the opening hole 6b is opened. Thereby, the operator can perform work such as periodic inspection of engine-related equipment through the maintenance hole 51a and the opening hole 6b. Below the maintenance hole 51a, regularly inspected parts are arranged and arranged so that the inspection work can be performed efficiently.

  The insertion hole 51 b is closed by the exhaust pipe cover 60. As shown also in FIG. 4, the exhaust pipe cover 60 bulges upward so as to cover the periphery of the exhaust pipe 22. The right side wall 60a of the exhaust pipe cover 60 is inclined obliquely outwardly downward. An exhaust hole 60b is formed in the side wall 60a.

  The distal end portion of the exhaust pipe 22 extends obliquely upward toward the side wall 60 a, is inserted into the exhaust hole 60 b, and protrudes outside the exhaust pipe cover 60. Thereby, it is possible to prevent a part of the exhaust gas exhausted from the exhaust pipe 22 from leaking into the exhaust pipe cover 60. The front end surface of the exhaust pipe 22 is substantially parallel to the inclination of the side wall 60 a of the exhaust pipe cover 60.

  The exhaust hole 60b is formed in such a size that the protruding portion of the exhaust pipe 22 is located in the exhaust hole 60b in plan view. As a result, when the exhaust pipe cover 60 is suspended by a crane and covered from directly above the exhaust pipe 22, the front end of the exhaust pipe 22 is exhausted without interfering with the front end of the exhaust pipe 22 and the exhaust pipe cover 60. The hole 60b can be inserted.

  A cylindrical exhaust duct 61 extending outward is attached to the peripheral edge of the exhaust hole 60b. The exhaust duct 61 is fastened and fixed to the exhaust pipe cover 60 with fastening bolts (not shown). The exhaust duct 61 may be attached to the exhaust pipe cover 60 by welding. Further, the surface on the tip side of the exhaust duct 61 is formed as a vertical surface. Thereby, rainwater can be prevented from entering the exhaust pipe cover 60 from the tip of the exhaust duct 61.

  A sound absorbing material 62 is provided on the inner peripheral surface of the exhaust duct 61. The sound absorbing material 62 is made of glass wool, for example. Thereby, when the exhaust gas exhausted from the exhaust pipe 22 passes through the exhaust duct 61, the exhaust sound is absorbed by the sound absorbing material 62, and the exhaust sound can be reduced.

  As described above, the exhaust gas of the engine 20 is purified by the exhaust purification device 21 and then exhausted to the outside of the machine room cover 6 a through the exhaust pipe 22 and the exhaust duct 61. A muffler (not shown) is connected to the middle of the exhaust pipe 22 through which exhaust gas purified by the exhaust purification device 21 flows.

<< Embodiment 2 >>
FIG. 5 is a side sectional view showing the configuration of the exhaust pipe cover according to the second embodiment. Since the difference from the first embodiment is that the side wall 60a of the exhaust pipe cover 60 can be freely opened and closed, the same parts as those in the first embodiment are denoted by the same reference numerals, and only the differences will be described.

  As shown in FIG. 5, the exhaust pipe cover 60 bulges upward so as to cover the periphery of the exhaust pipe 22. The right side wall 60a of the exhaust pipe cover 60 is inclined obliquely outwardly downward. An exhaust hole 60b is formed in the side wall 60a.

  The side wall 60a is supported by an open / close shaft 65 extending along its upper edge so as to be freely opened and closed. That is, the side wall 60a can be opened and closed upward about the opening and closing shaft 65. With such a configuration, it is possible to maintain equipment such as the exhaust gas purification device 21 covered by the exhaust pipe cover 60 only by opening and closing the side wall 60a of the exhaust pipe cover 60. Therefore, when maintaining equipment such as the exhaust gas purification device 21, it is not necessary to remove the entire exhaust pipe cover 60 and workability is improved.

<< Other Embodiments >>
About the said embodiment, it is good also as following structures.

  In the present embodiment, the exhaust duct 61 is provided on the right side wall 60a of the exhaust pipe cover 60 and exhaust gas is exhausted from the right side of the vehicle. However, the present invention is not limited to this embodiment. For example, the exhaust duct 61 may be provided on the side wall 60a on the rear side of the exhaust pipe cover 60 so that the exhaust gas is exhausted from the rear side of the vehicle.

  Further, in the present embodiment, the description has been given of the form in which the distal end portion of the exhaust pipe 22 extends obliquely upward so that the surface on the distal end side of the exhaust pipe 22 is substantially parallel to the inclination of the side wall 60a of the exhaust pipe cover 60. However, the present invention is not limited to this form. For example, as shown in FIG. 6, after the exhaust pipe 22 is extended upward, a tip end portion thereof may be bent in the horizontal direction toward the side wall 60 a of the exhaust pipe cover 60. In this way, a horizontal portion is provided in the middle of the exhaust pipe 22, and rainwater hardly enters the exhaust pipe 22.

  Further, in the present embodiment, the form in which the surface on the front end side of the exhaust duct 61 is formed as a vertical surface has been described. For example, as illustrated in FIG. 7, the surface on the front end side of the exhaust duct 61 is It is good also as a form formed in the surface inclined diagonally downward toward the base end side. This makes it difficult for rainwater to enter the exhaust pipe cover 60 from the tip of the exhaust duct 61. Further, the exhaust sound may be reduced by increasing the length of the exhaust duct 61 or changing the mounting angle of the exhaust duct 61.

  In the second embodiment, the open / close shaft 65 is extended along the upper edge of the side wall 60a of the exhaust pipe cover 60. However, as shown in FIG. 8, the open / close shaft 65 is opened / closed along the lower edge of the side wall 60a. The shaft 65 may be extended. In this way, it is possible to maintain equipment such as the exhaust purification device 21 by opening and closing the side wall 60a of the exhaust pipe cover 60 downward.

  As described above, the present invention can be assembled by covering the exhaust pipe cover from directly above the exhaust pipe, and the exhaust gas is exhausted by eliminating the gap between the tip of the exhaust pipe and the side wall of the exhaust pipe cover. Since a highly practical effect of preventing leakage into the cover is obtained, it is extremely useful and has high industrial applicability.

DESCRIPTION OF SYMBOLS 1 Lower traveling body 2 Upper revolving body 6a Machine room cover 6b Opening hole 10 Construction machine 20 Engine 22 Exhaust pipe 51 Raising member 51b Insertion hole 60 Exhaust pipe cover 60a Side wall 60b Exhaust hole 61 Exhaust duct 62 Sound absorbing material 65 Opening and closing shaft

Claims (5)

A construction machine comprising a lower traveling body, an upper swing body mounted on the lower traveling body, and an engine mounted on the upper swing body,
A machine room cover that covers the periphery of the engine and that has an upper surface formed with an insertion hole through which the exhaust pipe of the engine is inserted.
An exhaust pipe cover that bulges upward and covers the insertion hole so as to cover the periphery of the exhaust pipe,
An exhaust hole is formed in the side wall of the exhaust pipe cover,
The side wall in which the exhaust hole is formed is inclined obliquely outwardly downward,
The tip of the exhaust pipe extends toward the side wall of the exhaust pipe cover and is inserted through the exhaust hole, thereby projecting to the outside of the exhaust pipe cover,
The exhaust hole is formed in a size such that a protruding portion of the exhaust pipe is located in the exhaust hole in plan view ,
A construction machine , wherein a tubular exhaust duct extending outward from a peripheral edge of the exhaust hole is attached to the exhaust pipe cover . In claim 1 ,
A construction machine characterized in that a surface on a front end side of the exhaust duct is formed as a vertical surface or a surface inclined obliquely downward toward a base end side of the exhaust duct. In claim 1 or 2 ,
A construction machine, wherein a sound absorbing material is provided on an inner peripheral surface of the exhaust duct. In any one of claims 1 to 3 ,
A frame-like raising member attached to the upper surface of the machine room cover and partially raising the machine room cover;
The machine chamber cover is formed with an opening hole that opens along the inner peripheral edge of the raising member, while the insertion hole is formed on the upper surface of the raising member,
The exhaust pipe extends and projects upward from the raising member,
The construction machine according to claim 1, wherein the exhaust pipe cover is attached to an upper surface of the raising member so as to cover the periphery of the exhaust pipe. In any one of claims 1 to 4 ,
The construction machine according to claim 1, wherein the side wall of the exhaust pipe cover is supported by an opening / closing shaft extending along an upper edge or a lower edge of the exhaust pipe cover.

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