JP2011094383A - Construction machine - Google Patents

Abstract

[PROBLEMS] To prevent water from being directly applied to a filter and to save space without having to shift a filter and a slit provided in a cover.
A hydraulic excavator provided with a cab 5 is provided with an outside air introduction section 13 for taking outside air into an air conditioner on the left side surface of the cab 5 opposite to the work machine. The outside air introduction unit 13 was equipped with a filter 20 that removes dust from the outside air at the filter attachment unit 18 a of the internal introduction port 18 at the center of the side panel 16. A cover 15 that can be opened and closed is provided facing the outside of the filter 20. The cover 15 is provided with a plurality of slits 25 and stepped plates 24 for introducing outside air alternately. An inner wall 22 is fixed to the back surface of the cover 15, and the inner wall 22 has a waterproof plate 27 positioned between the slit 25 of the cover 15 and the filter 20.
[Selection] Figure 4

Description

  The present invention relates to a construction machine including an outside air introduction unit that takes in outside air into an air conditioner of an air conditioner in order to adjust air in a cab.

A construction machine such as a hydraulic excavator is operated by an operator in a cab. In general, an air conditioner (hereinafter referred to as an air conditioner) is installed in the cab to maintain the operator's working environment. In the cab, for example, an air conditioner for an air conditioner is installed near the driver's seat. The air conditioner is connected to a duct provided in the interior of the cab, and is formed with an outside air introduction section that communicates with the outside air through a vent formed in a cover provided on the wall surface of the cab from the duct through a filter.
A filter is replaceably mounted on a filter mounting portion provided in an outside air introduction portion of the air conditioner. Since the amount of outside air introduced from the outside air introduction section affects the performance of the air conditioner, a certain amount of opening is required. On the other hand, the filter that comes into contact with the outside air deteriorates its performance if it is directly exposed to water during a car wash or the like, so it is necessary to set the filter so that it is not exposed to water from the outside.
Therefore, in a conventional construction machine such as a hydraulic excavator, the outside air introduction portion of the air conditioner is provided at the rear of the cab so that the opening amount can be increased and water is not directly applied to the filter during car washing or the like. Moreover, in the conventional construction machine, the outside air introduction part is located in the outer wall cover of the machine body such as the cab or the upper swing body, so that the filter replacement work is complicated and the maintenance is not good.

As means for improving such a problem, for example, a cab for a construction machine disclosed in Patent Document 1 below has been proposed. In this construction machine, the outside air introduction path is provided on the left side surface opposite to the right side surface of the operator's cab provided with the front working machine including an arm, a bucket and the like. In this construction machine, an outside plate that can be opened and closed is provided by forming an outside air introduction path on the left side surface of the cab, so that the outside plate can be opened and closed without being obstructed by the front work machine or the machine room.
In addition, the outer plate of the cab is formed to extend in the horizontal direction with respect to the outside air filter of the outside air introduction path provided on the left side of the cab, and the through hole for introducing the outside air provided in the outer plate is outside air. It is provided at a position shifted laterally with respect to the filter. And the linear path | route of the external air which directly connects a through-hole and an external air filter can be interrupted | blocked by the interruption | blocking part which partitions off a through-hole. Thereby, the intrusion of rainwater, dust, or the like directly reaching the outside air filter from the through hole is reduced, and the failure of the air conditioner can be reduced.

JP 2006-15917 A

  However, in the above-described configuration, the outside plate for introducing outside air that covers the outside air filter is formed in a dimension that is long in the horizontal direction in which the through hole for introducing outside air is displaced from the outside air filter. There is a problem that a sufficient space for the through hole or the outside air filter or both cannot be ensured when installing in the case. In addition, there is a problem that a large space is required to open and close the outer surface when the outside air filter is replaced, and the replacement space for the outside air filter is complicated.

  In view of such circumstances, the present invention provides a construction machine that can prevent water from being directly applied to the filter and can realize space saving without the need to shift the positions of the filter and the outside air introduction hole. The purpose is to do.

The construction machine according to the present invention includes an outside air introduction unit that takes outside air into the air conditioner in the operator room in the construction machine having the cab, and the outside air introduction unit removes dust from the outside air introduced into the air conditioner. A filter, an openable / closable cover provided outside the filter and provided with an outside air introduction hole for introducing outside air, and a waterproof member provided between the cover and the filter. Features.
According to the construction machine of the present invention, the outside air flowing in through the outside air introduction hole of the cover can be introduced into the filter by bypassing the waterproof member, and dust and the like in the outside air can be removed. When exposed to wind and rain, the water flowing in through the outside air introduction hole of the cover can be prevented from being directly applied to the filter by being blocked by the waterproof member. As a result, it is possible to prevent the filter from being directly exposed to water during a car wash or wind and rain, thereby preventing deterioration in performance. In addition, since the filter is provided to face the outside air introduction hole of the cover, it is not necessary to displace the outside air introduction hole of the cover with respect to the filter, and the cover is reduced in size and space saving. be able to.

The waterproof member is a waterproof plate attached to the cover.
When maintenance such as filter replacement is performed, if the cover is opened, the waterproof member is also opened, so the waterproof member does not interfere with filter replacement. And the rigidity of a cover can be improved by attaching a waterproof board to a cover and integrating.

Further, the waterproof member is provided with an inner hole portion for introducing outside air, and the waterproof member between the inner hole portions is provided in a linear flow path of the outside air introduced into the inside through the hole for introducing outside air. You may make it interrupt.
Since the outside air that passes through the outside air introduction hole provided in the cover bypasses the waterproof member and is introduced into the filter through the inside hole, the amount of outside air introduced can be increased. In addition, water during a car wash or the like that passes through the outside air introduction hole of the cover travels linearly and is blocked by the waterproof member provided on the linear flow path, and directly passes through the inner hole of the waterproof member. Since it is hindered, it is possible to prevent water from splashing directly on the filter.

Moreover, it is preferable that the cover is provided on the side surface opposite to the work machine provided adjacent to the cab.
By providing a cover on the side surface opposite to the work machine provided adjacent to the side surface of the cab, the work machine does not get in the way when opening and closing the cover for maintenance or the like.

According to the construction machine of the present invention, the outside air flowing through the outside air introduction hole of the cover can be introduced into the filter by bypassing the waterproof member, and dust and the like in the outside air can be removed. When exposed to wind and rain, the water flowing in through the outside air introduction hole of the cover is blocked by the waterproof member and is prevented from being directly applied to the filter. As a result, it is possible to prevent the filter performance from deteriorating due to direct water splashing on the filter.
In addition, since the filter is provided to face the outside air introduction hole of the cover through the waterproof member, it is not necessary to shift the outside air introduction hole of the cover with respect to the filter, and the cover is small. Therefore, space saving can be realized.

It is a principal part perspective view which shows the hydraulic shovel by 1st embodiment of this invention. It is a perspective view of the state where the cover of the cab shown in FIG. 1 was closed. It is a perspective view of the state which opened the cover of the cab shown in FIG. It is an AA principal part horizontal sectional view in Drawing 2 showing an outside air introduction part in the state where a cover of a cab was closed. It is a reverse view of a cover. It is a side view of a cover. It is a surface view of a cover. It is a principal part horizontal sectional view similar to FIG. 4 which shows the external air introduction part in the state which closed the cover of the cab by 2nd embodiment of this invention.

Hereinafter, an outside air introduction unit in a hydraulic excavator according to an embodiment of the present invention will be described.
1 to 3 show a hydraulic excavator according to a first embodiment.
As shown in FIG. 1, the excavator 1 according to the present embodiment is provided with an upper swing body 3 on the upper portion of a lower traveling body 2 so as to be able to swing. The revolving frame 4 of the upper revolving structure 3 is provided with a cab 5 on the left side of the front, for example, and on the right side of the cab 5 is provided a work machine 6 equipped with an arm, a bucket and the like so as to move up and down.
A driver's seat and a driving device (not shown) are provided in the cab 5 and an air conditioner 8 for an air conditioner for adjusting the indoor environment in the cab 5 is provided (see FIG. 2). 2 and 3, the cab 5 is surrounded by, for example, a substantially rectangular parallelepiped wall, a front window 9 is provided on the front side, and the left side 10 opposite to the right side on which the work implement 6 is provided. A door 11 is attached. A side window portion 12 is provided at the upper rear side of the door 11 on the left side surface 10, and an outside air introduction portion 13 communicating with the air conditioner 8 is provided below the side window portion 12.

For example, a substantially triangular cover 15 is provided on the left side surface 10 of the cab 5 so that it can be opened and closed (see FIGS. 2 and 3). The cover 15 can be locked and released in a closed state by locking means (not shown).
4 is a cross-sectional view taken along line AA of the outside air introduction portion 13 in the cab 5 shown in FIG. 2, and a side panel 16 connected to the left side surface 10 of the cab 5 is provided as an inner wall inside the cover 15. ing. A space formed by the side panel 16 and the cover 15 is an inner space portion 17. An internal introduction port 18 connected to the duct 19 is provided in the central portion of the side panel 16 in the inner space portion 17. For example, a filter 20 for removing dust from outside air is detachably mounted on a filter mounting portion 18 a having a substantially rectangular tube shape provided in the internal introduction port 18. A duct 19 that communicates with the inner space 17 through a filter 20 provided in the internal introduction port 18 is connected to the air conditioner 8 inside the cab 5.

As shown in FIGS. 4 to 7, the cover 15 is fixed to the inner wall 22 attached to the back surface thereof by bolts or the like. Although the cover 15 is formed in a substantially triangular plate shape in the present embodiment, a suitable shape can be adopted. The cover 15 can be opened and closed by a hinge 23 attached to the inner wall 22 and the side panel 16. In the cover 15, a plurality of stepped plate portions 24 and slits 25 are alternately arranged in at least a region of the cover body 15 a having a substantially triangular plate shape facing the filter 20.
Each stepped plate portion 24 includes an inner plate portion 24a, an outer plate portion 24b, and both plate portions 24a provided substantially parallel to the inner wall 22 at a position close to and away from the inner wall 22 in the sectional view shown in FIG. 24b is formed by being bent into a substantially stepped shape or an inclined surface shape with an inclined surface portion 24c, and the outside air is formed in a step portion between the inner plate portion 24a and the outer plate portion 24b between the adjacent stepped plate portions 24, 24. A slit 25 is formed as an outside air introduction hole for securing an inflow amount of the air.
With this configuration, the outside air introduced through the slit 25 is guided by the stepped plate portion 24 and flows in an oblique direction with respect to the inner wall 22. The region where the plurality of slits 25 are provided is opposed to the region where the filter 20 is provided and extends over a wider range than the region of the filter 20.

As shown in FIG. 5, the inner wall 22 attached to the back surface of the cover 15 corresponds to the outer shape (for example, a quadrangle) of the filter 20 in a region facing the filter 20 with the cover 15 closed, and has a dimension larger than that of the filter 20. A large waterproof plate 27 is provided, and a substantially frame-shaped frame portion 28 is formed facing the peripheral edge of the cover 15. The waterproof plate 27 and the frame portion 28 are integrally formed to form the inner wall 22. Alternatively, the entire inner wall 22 including the frame portion 28 may be the waterproof plate 27.
The inner wall 22 is formed with, for example, a plurality of divided through holes 29 between the waterproof plate 27 and the frame portion 28, and the outside air that has passed through the slits 25 of the cover 15 is filtered through the through holes 29. It will be allowed to flow into.
By providing the waterproof plate 27 on the inner wall 22, it is possible to shield the outside air and water that have passed through the slit 25 of the cover 15 from being directly applied to the filter 20, and the outside air bypasses the waterproof plate 27 and passes through the through hole 29. It reaches the inner space 17 through.

The outside air introduction part 13 of the hydraulic excavator 1 according to the present embodiment has the above-described configuration, and the operation thereof will be described next.
When exchanging the filter 20 of the air conditioner 8 in the hydraulic excavator 1, the filter 15 is unlocked on the left side surface 10 of the cab 5 and the cover 15 is opened around the hinge 23. 20 may be removed from the filter mounting portion 18a of the internal introduction port 18 connected to the duct 19 and replaced with a new filter 20 for mounting.
When the cover 15 is opened, the waterproof plate 27 is fixed to the cover 15 as a part of the inner wall 22 and opens integrally with the cover, so that it does not interfere with filter replacement. Further, since the cover 15 is provided on the left side surface 10 opposite to the right side surface on which the working machine 6 of the cab 5 is provided, the working machine 6 does not interfere with the opening / closing operation of the cover 15 and the maintenance work is easy. It is.
When the air conditioner is operated, outside air is sucked into the inside through the slit 25 of the cover 15 by driving a fan (not shown) of the air conditioner 8. Then, most of the sucked outside air bypasses the waterproof plate 27 provided on the inner wall 22 and flows into the inner space 17 through the through hole 29 provided in the periphery thereof, and passes through the filter 20 from the inner inlet 18 to the inside of the duct 19. To be sent to.

For example, when the hydraulic excavator 1 is washed, if water is discharged to the hydraulic excavator 1 with a hose or the like with the cover 15 closed, the cab 5 passes through a slit 25 provided in the cover 15 of the outside air introduction unit 13. Water enters the interior. The water linearly entering from the slit 25 collides with the waterproof plate 27 of the inner wall 22 and is blocked, and does not directly hit the filter 20.
Since a part of the slit 25 is located at a position opposite to the through hole 29 after removing the waterproof plate 27, the water that has passed through this part of the slit 25 directly enters the inner space 17, but at least the filter 20 and its surroundings Since the waterproof plate 27 is provided in the region, it falls on the side panel 16 around the filter 20. Therefore, the water that enters the inner space portion 17 through the slit 25 does not directly collide with the filter 20 in a region outside the waterproof plate 27.
Even when the excavator 1 is exposed to wind and rain such as a typhoon or heavy rain, water entering through the slit 25 is blocked by the waterproof plate 27 and there is no possibility that the filter 20 is directly applied to the filter 20 as in the case of car washing.

As described above, according to the outside air introducing portion 13 of the hydraulic excavator 1 according to the present embodiment, the waterproof plate 27 is integrally fixed to the back surface of the cover 15 provided on the left side surface 10 of the cab 5 as the inner wall 22. Even if water enters the inside through the slit 25 of the cover 15 due to wind, rain, or the like, the entry is blocked by the waterproof plate 27 and water can be prevented from being directly applied to the filter 20. Therefore, there is no possibility that the performance of the filter 20 is deteriorated by water.
In addition, since the waterproof plate 27 is fixed to the cover 15 as a part or the whole of the inner wall 22, the waterproof plate 27 is integrally opened when the cover 15 is opened during maintenance such as replacement of the filter 20. Never become. Further, since the waterproof plate 27 provided on the back surface of the cover 15 constitutes the inner wall 22 that extends to the entire cover 15 together with the frame portion 28, the rigidity of the cover 15 can be improved.
Further, since the waterproof plate 27 is provided on the back surface of the cover 15, it is not necessary to shift the position of the slit 25 and the position of the filter 20 as in the prior art described above, so that the cover 15 can be disposed facing each other. 15 and the inner space part 17 can be formed small, and space saving can be realized.

Next, the outside air introduction portion 31 of the hydraulic excavator 1 according to the second embodiment of the present invention will be described with reference to FIG. 8, and the same or similar parts and members as those in the first embodiment described above will be described using the same reference numerals. Omitted.
8 is different from the waterproof plate 27 according to the first embodiment in the waterproof plate 32 provided on the inner wall 22 of the cover 15 in the outside air introduction portion 31 of the excavator 1 according to the second embodiment shown in FIG. In the waterproof plate 32 according to the present embodiment, a plurality of inner slits 33 are formed as inner holes at predetermined intervals, and the waterproof plate portion 34 positioned between the inner slits 33 and 33 is bent.
For example, one end portion 34a adjacent to one slit 25 of the cover 15 is bent or curved in a direction approaching the slit 25 to advance to the slit 25 side, and the other end portion 34b is adjacent to each waterproof plate portion 34. It bends or curves in a direction away from the other slit 25. Thus, each waterproof plate 34 shown in FIG. 8 has a shape in which end portions 34a and 34b on both sides that are bent or curved are connected to each other via a flat connecting portion 34c.

Since one end portion 34a and the other end portion 34b of the two waterproof plate portions 34, 34 of the waterproof plate 32 are alternately provided in the front-rear direction at positions facing the slit 25 of the cover 15, a linear flow of water entering from the slit 25 is provided. The road is shielded by one end 34a and the other end 34b of the two waterproof plates 34, 34. Therefore, outside air is introduced through the inner slit 33 between the one end 34a and the other end 34 of the two waterproof plate portions 34, 34, but the water flowing through the linear flow path has one end 34a and the other end. Blocked by the part 34.
In FIG. 8, the waterproof plate portions 34, 34 at both ends are formed by omitting one of the one end 34a and the other end 34b.

Since the outside air introduction part 31 according to the second embodiment has the above-described configuration, a part of the outside air entering from the slit 25 of the cover 15 is an inner slit between the waterproof board parts 34, 34 adjacent to the waterproof board 32. The remaining outside air enters the inner space portion 17 through the slit 25 of the cover 15 and the gap between the stepped plate portion 24 of the cover 15 and the waterproof plate portion 34 of the inner wall 22.
Therefore, even when water enters linearly from the slit 25 of the cover 15 due to car washing or wind and rain, it collides with one end 34a or the other end 34b of the two waterproof plates 34, 34 of the waterproof plate 32. It does not reach the filter 20 directly. Even if the inner slit 33 is formed between the waterproof plate portions 34 and 34 of the waterproof plate 32, it is possible to prevent water from being applied directly to the filter 20.

  According to the outside air introduction unit 31 according to the second embodiment, the waterproof plate 32 can prevent water from directly passing from the slit 25 of the cover 15 to the filter 20 due to car washing, wind and rain, etc. By providing the inner slit 33 and forming the waterproof plate portion 34 between the slits 33 by bending or bending, the amount of outside air that has passed through the slit 25 supplied to the filter 20 can be increased.

In each of the above-described embodiments, the stepped plate portion 24 provided on the cover 15 is formed in an inclined surface shape. However, in the present invention, the shape is not limited to such a shape. The shape can be adopted. Similarly, the shape of the waterproof plate 34 formed on the inner wall 22 in the second embodiment is not limited to the above-described bent shape or curved shape, so that water that has passed through the slit 25 does not reach the filter 20 directly. What is necessary is just to be arrange | positioned so that the linear course may be prevented.
Further, the waterproof members constituting the waterproof plates 27 and 32 are not necessarily fixed integrally with the cover 15. For example, the waterproof members 27 and 32 may be provided so as to be able to be opened / closed or detached separately from the cover 15.
In each of the above-described embodiments, the slit 15 is provided in the cover 15 as an outside air introduction hole. However, the slit 25 is not necessarily provided, and an appropriately shaped outside air introduction hole for introducing outside air can be employed. Similarly, in the second embodiment, the inner slit 33 is provided in the waterproof plate 32. However, the inner slit 33 does not have to be a slit shape, and an appropriately shaped inner hole for introducing outside air can be adopted.
Needless to say, the present invention is not limited to the hydraulic excavator 1 and can be applied to various construction machines.

DESCRIPTION OF SYMBOLS 1 Hydraulic excavator 5 Driver's cab 8 Air conditioner 13, 31 Outside air introduction part 15 Cover 20 Filter 22 Inner wall 24 Step board part 25 Slit 27, 32 Waterproof board 34 Waterproof board part 33 Inner slit

Claims (4)

In construction machinery with cab,
It has an outside air introduction part that takes outside air into the air conditioner in the cab, and the outside air introduction part
A filter that removes dust from outside air introduced into the air conditioner;
An openable and closable cover that is provided facing the outside of the filter and provided with an outside air introduction hole for introducing outside air;
A construction machine comprising a waterproof member provided between a cover and a filter.   The construction machine according to claim 1, wherein the waterproof member is a waterproof plate attached to the cover.   The waterproof member is provided with an inner hole portion for introducing outside air, and a waterproof member between the inner hole portions is provided and blocked in a linear flow path of the outside air introduced through the hole for introducing outside air. The construction machine according to claim 1 or 2, wherein the construction machine is configured as described above.   The construction machine according to any one of claims 1 to 3, wherein the cover is provided on a side surface opposite to the work machine provided adjacent to the cab.

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