JP2000186343A - Construction machinery - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the load on a worker when opening or closing an engine cover. SOLUTION: To the upper surface plate 8b of a building cover 8, a roller 11 is provided along the front and rear of an opening section 9; a guide rail 15 guided in horizontal direction by the roller 11 is provided for the right and left division covers 13 constituting the engine cover 12; and each division cover 13 moves horizontally in left and right direction thereby opening and closing the opening section 9 of the building cover 8 in the configuration. In this way, the weight of each division cover 13 moving horizontally can be received by the building cover 8 through the guide rail 15, roller 11 or the like, by which the worker's load can be reduced when opening and closing the opening section 9 of the building cover 8.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a construction machine such as a hydraulic excavator and a wheel loader, and more particularly to a construction machine having a building cover for accommodating an engine and the like.

[0002]

2. Description of the Related Art Generally, construction machines such as hydraulic excavators are
The vehicle includes a frame constituting a vehicle body, an engine provided on the frame, and a building cover provided on the frame for accommodating the engine.

Here, for the engine housed in the building cover, it is necessary to perform daily maintenance work such as checking the amount of lubricating oil, checking the amount of cooling water in the radiator, and replacing the oil filter. . For this reason, an opening for engine inspection is provided on the upper surface of the building cover, and an engine cover is provided on the upper side of the building cover that moves between an open position for opening the opening and a closed position for closing the opening. .

However, in the above-described engine cover according to the prior art, one end in the left and right directions is attached to the building cover by a hinge mechanism.
By rotating the other end in the right direction up and down,
The opening of the building cover is opened and closed.

[0005] For this reason, when the size of the engine cover is increased with the increase in the size of the hydraulic excavator, the weight of the engine cover also increases, and therefore, there is a problem that the burden on the operator when opening and closing the engine cover increases. is there.

On the other hand, as another conventional technique, an air cylinder, a torque bar, or the like for urging the engine cover in the opening direction is provided between the building cover and the engine cover to open and close the engine cover. Construction machines configured to reduce the burden on workers are proposed.

[0007]

However, in the construction machines according to the other prior arts described above, the angle at which the engine cover is opened is limited by an air cylinder, a torque bar, and the like provided between the building cover and the engine cover. Therefore, even when the engine cover is in the open position, the work space around the opening of the building cover is narrow, and there is a problem that workability when performing maintenance and inspection of the engine and the like is poor.

In an engine cover that opens and closes by turning upward and downward, a rod-shaped support member is usually set up between the engine cover moved to the open position and the building cover.
Although the engine cover is configured to be supported by the support member, if the support member comes off, the engine cover may move to the closed position due to its own weight.

The present invention has been made in view of the above-described problems of the prior art, and can reduce the burden of opening and closing an opening of a building cover, and can perform a large work around the opening of the building cover. It is an object of the present invention to provide a construction machine capable of securing a space.

[0010]

In order to solve the above-mentioned problems, the present invention provides a frame constituting a vehicle body, an engine provided on the frame, and an engine mounted on the frame for accommodating the engine. Applied to construction machinery consisting of a building cover.

A feature of the construction adopted by the invention of claim 1 is that an opening for engine inspection is provided on the upper surface of the building cover, and a guide member is provided along the opening at a position near the opening. Is provided above the building cover, and an engine cover that moves in a horizontal direction between an open position in which the opening is opened and a closed position in which the opening is closed is provided, and the engine cover is guided in the horizontal direction by the guide member. That is, the guided member is provided.

[0012] With this configuration, the engine cover moves in the horizontal direction while the guided member on the engine cover side is guided by the guide member on the building cover side, and opens and closes the opening of the building cover. be able to. in this case,
Since the building cover receives the weight of the engine cover via the guided member and the guide member, the burden on the operator when opening and closing the opening can be reduced.

According to a second aspect of the present invention, the engine cover is constituted by a plurality of divided covers approaching and separating from each other along the guide member.

With this configuration, the opening of the building cover can be closed when the divided covers are brought close to each other, and the opening of the building cover can be opened when the divided covers are separated from each other. .

According to a third aspect of the present invention, one of the guide member and the guided member is constituted by a guide rail extending horizontally along the opening, and the other of the guide member and the guided member is arranged along the guide rail. This is due to the configuration of rolling rollers.

With this configuration, when the engine cover moves in the horizontal direction, the rollers roll along the guide rails, so that the engine cover can be moved smoothly with a small pressing force.

A fourth aspect of the present invention is that a lock mechanism is provided between the divided covers to hold the divided covers in a closed state.

With this configuration, after maintenance and inspection of the engine and the like are completed, each of the divided covers can be held closed by the lock mechanism, and the opening of the building cover can be closed.

[0019]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a hydraulic shovel according to an embodiment of the present invention; FIG.

In FIGS. 1 and 2, reference numeral 1 denotes a lower traveling body, 2 denotes an upper revolving body which forms a vehicle body together with the lower traveling body 1, and a working device 3 is raised and lowered at the front center of the upper revolving body 2. It is provided as possible.

Reference numeral 4 denotes a revolving frame constituting the upper revolving unit 2. The revolving frame 4 has a frame structure, and is rotatably provided on the lower traveling unit 1 via a revolving device (not shown). A cab 5 defining an operator's cab is provided on the front left side of the turning frame 4.
A counterweight 6 is provided on the rear side of the counterweight.

Reference numeral 7 denotes an engine located between the cab 5 and the counterweight 6 and disposed on the revolving frame 4.
The engine 7 is housed in a building cover 8 described later together with a hydraulic pump (not shown) and the like, and drives the hydraulic pump.

Reference numeral 8 denotes a building cover provided between the cab 5 and the counterweight 6 and provided on the revolving frame 4. The building cover 8 is located on both the left and right sides of the revolving frame 4 and is located at the front. The left and right side plates 8A (only the left side is shown) extending rearward, and the upper surface plate 8B extending horizontally from the upper end of each side plate 8A. Then, the rear side of the building cover 8 is closed by the counterweight 6,
The engine 7 and the like are housed in the building cover 8.

Reference numeral 9 denotes an opening provided on the upper surface plate 8B of the building cover 8. The opening 9 has a substantially rectangular shape with a large opening area for maintenance and inspection of the engine 7 and the like housed in the building cover 8. And an engine cover 1 to be described later.
2, which is opened and closed.

Are brackets provided on the upper surface plate 8B of the building cover 8 along the opening 9;
A total of eight are arranged, four on the front side and four on the rear side.
Each of the brackets 10 is formed in a substantially L-shape in which a protruding side is bent upward to form a bent portion 10A, and is fixed to a lower surface of the upper surface plate 8B by welding or the like to protrude into the opening 9. I have.

Are rollers serving as guide members provided on the upper surface plate 8B of the building cover 8 via the brackets 10, respectively. The rollers 11, as shown in FIG. It is rotatably attached to the bent portion 10A via the support shaft 11A, and is composed of a total of eight pieces. The roller 11 is used for a guide rail 1 described later.
Rolling along 5.

Reference numeral 12 denotes an engine cover provided on the upper plate 8B of the building cover 8 for opening and closing the opening 9 of the building cover 8. The engine cover 12 is provided in place of the engine cover according to the prior art. Things. Here, the engine cover 12 is located at a distance from the center in the left and right directions.
It is divided into left and right divided covers 13, 13 which can be moved in directions approaching and separating from each other (left and right directions).

Here, as shown in FIGS. 3 and 4, each divided cover 13 is surrounded by a front surface portion 13A, a rear surface portion 13B, a side surface portion 13C, and an upper surface portion 13D.
It is formed in a box shape having a contact end 13E on the side opposite to 3C.

As shown in FIG. 5, reinforcing plates 14, L extending in the left and right directions are provided inside the front portion 13A and the rear portion 13B of the left and right split covers 13, respectively.
Are fixed by welding or the like, and the lower surface portion 14 of each reinforcing plate 14 is
Guide rails 15 described later are fixed to A, respectively.

Reference numerals 15, 15,... Denote guide rails as guided members. Each of the guide rails 15 is provided one before and after the left and right split covers 13 in total, each of which is four in total. It is guided in the direction. Each of the guide rails 15 is formed in a U-shaped cross section and is fixed to a lower surface portion 14A of each of the reinforcing plates 14 fixed to the divided cover 13 by welding or the like. It extends to the left and right along the part 9.

Accordingly, the rollers 11 provided on the building cover 8 side are engaged with the guide rails 15 provided on the left and right split covers 13, and the guide rails 15 are moved along the rollers 11. , Left and right split covers 13
However, it is configured to horizontally move left and right between an open position (a position in FIG. 2) for opening the opening 9 of the building cover 8 and a closed position (a position in FIG. 1) for closing the opening 9. I have.

Reference numerals 16, 16,... Denote four stoppers for setting the open position, which are fixed to the center portion of each guide rail 15 using bolts (not shown) or the like. As shown in Fig. 5, when each divided cover 13 moves toward the open position, the moving range of each divided cover 13 is limited by contacting the four rollers 11 located at the center in the left and right directions. Then, the open position of each of the divided covers 13 is set.

Reference numerals 17, 17,... Denote four stoppers for setting a closed position which are fixed to the left and right ends of each guide rail 15 with bolts (not shown).
As shown in FIG. 3, when each of the divided covers 13 moves toward the closed position, 4
By contacting the rollers 11, each divided cover 1
3 is set, and the closed position of each divided cover 13 is set.

Reference numerals 18 denote locking mechanisms provided between the upper surfaces 13D of the left and right divisional covers 13 to hold the divisional covers 13 in a closed state. As shown in the figure, the bracket 19 includes a stopper 19 and a receiving member 20 on which the stopper 19 is hooked.

Here, the stopper 19 is attached to the upper surface 13D of one of the divided covers 13 so as to be rotatable at its base end, and includes an arm 19B having a spring 19A built therein and an arm 19B.
And a locking portion 19C rotatably provided at the distal end side. On the other hand, the receiving member 20 is fixed to the upper surface portion 13D of the other divided cover 13 and has a pin 20A on which the retaining portion 19C of the retaining member 19 is hooked.

The lock mechanism 18 engages the pin 20A of the receiving member 20 with the engaging portion 19C of the stopper 19 in a state where the contact ends 13E of the left and right split covers 13 are in contact with each other.
, Each divided cover 13 is held in a closed state.

The hydraulic excavator according to the present embodiment has the above-described configuration. Hereinafter, the opening 9 of the building cover 8 is opened and closed during maintenance and inspection of the engine 7 and the like housed in the building cover 8. Therefore, the left and right split covers 13, 1
3 is moved from the closed position to the open position.

First, as shown in FIG.
By turning the stopper 19 upward, the hook 19 </ b> C of the stopper 19 is removed from the pin 20 </ b> A of the receiving member 20, thereby releasing the closed state of each divided cover 13.

Next, the left and right split covers 13 are pushed left and right so as to be separated from each other. At this time, the guide groove 15A of the guide rail 15 fixed to the divided cover 13
, The roller 11 rotatably provided on the building cover 8 via the bracket 10 is engaged, so that the guide rail 15 can smoothly move on the roller 11 while rolling the roller 11. Thus, the divided cover 13 can be moved in the horizontal direction with a small force.

As a result, as shown in FIGS. 2 and 4, the left and right split covers 13, 13 are in the open position, the opening 9 of the building cover 8 is opened, and the engine housed in the building cover 8 is opened. 7 etc. are exposed to the outside. At this time, as shown in FIG. 4, the stopper 16 for setting the open position provided on the guide rail 15 abuts on the roller 11, thereby preventing the guide rail 15 from excessively moving and separating from the roller 11. .

After each divided cover 13 is set to the open position, a fixing member (not shown) for sandwiching the roller 11 between, for example, the stopper 16 is attached to the guide rail 15, and the movement of the guide rail 15 is prohibited. Thereby, each divided cover 13 can be held at the open position.

After the split cover 13 is held at the open position, maintenance and inspection of the engine 7 and the like are performed through the opened opening 9. At this time, since the split cover 13 largely opens the opening 9 by moving in the horizontal direction, for example, as compared with the engine cover of the related art which is configured to rotate upward and downward by a hinge mechanism, for example, A large work space can be secured around the opening 9, and workability during maintenance and inspection can be improved.

Since the building cover 8 receives the weight of the divided cover 13 via the guide rails 15, the rollers 11, the brackets 10, and the like, the split cover 13 is configured to pivot upward and downward by, for example, a hinge mechanism. Compared with the prior art engine cover, a support member for supporting the engine cover in the open position can be eliminated, and the engine cover in the open position is inadvertently moved to the closed position by its own weight. Can be reliably prevented, and safety at the time of maintenance inspection can be improved.

After the maintenance and inspection of the engine 7 and the like are completed, the left and right split covers 13, 13 are pushed leftward and rightward so as to approach each other. As a result, the guide rail 15 fixed to the divided cover 13 causes the roller 11 provided on the building cover 8 side to roll, and the roller 1
1, and the divided cover 13 moves to the closed position shown in FIG. 1 along with the guide rail 15.

As shown in FIG. 3, the stopper 17 for setting the closed position provided on the guide rail 15 is
, The left and right split covers 13 are positioned in the closed position, and the contact ends 13E of the split covers 13 come into contact with each other at this position.

In this state, as shown in FIG. 7, the stopper 19 of the lock mechanism 18 is rotated downward, and the catch 19C of the stopper 19 is hooked on the pin 20A of the holder 20, whereby Holding the divided cover 13 in a closed state,
The opening 9 of the building cover 8 can be reliably closed.

Thus, according to the present embodiment, the roller 11 is provided along the opening 9 on the upper surface plate 8B of the building cover 8, and the left and right divided covers 13 are guided in the horizontal direction by the roller 11. A guide rail 15 is provided and the guide rail 15 is moved along the roller 11 so that the left and right split covers 13 move horizontally in the left and right directions to open and close the opening 9 of the building cover 8. It has a configuration.

For this reason, the weight of the divided cover 13 constituting the engine cover 12 is reduced by the guide rail 15 and the roller 1.
1 can be received by the building cover 8 via
For example, the burden on the operator when opening and closing the opening 9 of the building cover 8 is greatly reduced as compared with a conventional engine cover that is configured to rotate upward and downward by a hinge mechanism. Can be.

Further, since the divided cover 13 largely opens the opening 9 by moving in the horizontal direction, the divided cover 13 is rotated upward and downward by a hinge mechanism, for example, as compared with a conventional engine cover configured to rotate upward and downward. Thus, a large work space can be secured around the opening 9, and workability during maintenance and inspection can be improved.

Further, since the split cover 13, which has been in the open position, can be reliably prevented from being accidentally moved to the closed position by its own weight, the engine cover is supported in an open state by a support member as in the prior art. As compared with the configuration, the safety at the time of maintenance and inspection of the engine 7 and the like can be improved.

In the above-described embodiment, the roller 11 as a guide member is provided on the building cover 8 side, and the guide rail 15 as a guided member is provided on the division cover 13 side. The present invention is not limited to this. For example, as in a modification shown in FIG. 9, a guide rail 15 is provided along an opening 9 on an upper surface plate 8B of a building cover 8 and a reinforcing plate provided on a divided cover 13. 14 lower surface portion 14A
The roller 11 may be provided via a bracket 31 or the like.

Further, in the above-described embodiment, the divided covers 13 constituting the engine cover 12 are described as moving horizontally in the left and right directions. However, the present invention is not limited to this. , It may be configured to move horizontally backward.

In the above-described embodiment, the case where the engine cover 12 is constituted by the two divided covers 13 has been described as an example. However, the present invention is not limited to this. For example, the divided covers 13 are integrated. It may be configured as an engine cover composed of one engine cover or three divided covers.

Further, in the above-described embodiment, a description has been given by taking a hydraulic excavator as an example. However, the present invention is not limited to this, and may be widely applied to other construction machines having a building cover such as a wheel loader. Can be.

[0055]

As described above in detail, according to the first aspect of the present invention, an opening for engine inspection is provided on the upper surface of the building cover, and a guide member is provided along the opening at a position near the opening. Is provided on the upper side of the building cover, an engine cover that moves horizontally between an open position where the opening is opened and a closed position where the opening is closed, and a guided member that is guided in a horizontal direction by a guide member on the engine cover. The opening of the building cover can be opened and closed by moving the engine cover in the horizontal direction. in this case,
Since the building cover receives the weight of the engine cover via the guided member and the guide member, the burden on the operator when opening and closing the opening can be reduced.

Moreover, since the opening of the engine cover is largely opened by moving the engine cover in the horizontal direction, the opening of the engine cover is larger than that of a conventional engine cover which is configured to rotate up and down by a hinge mechanism. A large work space can be secured around the section, and workability during maintenance and inspection can be improved.

According to the second aspect of the present invention, the engine cover is constituted by the plurality of divided covers approaching and separating from each other along the guide member. Can be closed, and the opening of the building cover can be opened by separating the divided covers from each other.

According to the third aspect of the present invention, one of the guide member and the guided member is constituted by a guide rail extending in the horizontal direction along the opening, and the other of the guide member and the guided member is the guide rail. Since the roller is configured to roll along the rail, the roller rolls along the guide rail when the engine cover moves in the horizontal direction, so that the engine cover can be smoothly moved with a small force. .

Further, according to the fourth aspect of the present invention, since a lock mechanism for holding each divided cover in a closed state is provided between each divided cover, after maintenance and inspection of the engine and the like are completed, By holding each divided cover in the closed state by the lock mechanism, the opening of the building cover can be securely closed at the time of work or the like.

[Brief description of the drawings]

FIG. 1 is a partially broken perspective view showing a hydraulic excavator used in an embodiment.

FIG. 2 is a partially broken perspective view showing the hydraulic excavator used in the embodiment in a state where left and right split covers constituting an engine cover are opened.

FIG. 3 is a main part plan view showing a state in which left and right split covers constituting the engine cover are closed.

FIG. 4 is a main part plan view showing a state where left and right split covers constituting the engine cover are opened.

FIG. 5 is an enlarged perspective view of an essential part showing a roller on a building cover side and a guide rail on a split cover side separated from each other.

FIG. 6 is an enlarged cross-sectional view showing a divided cover, guide rails, rollers, and the like, as viewed from a direction indicated by arrows VI-VI in FIG. 3;

FIG. 7 is a cross-sectional view showing the lock mechanism as viewed from the direction of arrows VII-VII in FIG. 3;

FIG. 8 is a sectional view similar to FIG. 7, showing a state in which a lock mechanism is released.

FIG. 9 is a cross-sectional view of the same position as FIG. 6 showing a divided cover, guide rails, rollers and the like according to a modified example of the present invention.

[Explanation of symbols]

 4 Revolving frame (frame) 7 Engine 8 Building cover 9 Opening 11 Roller (guide member) 12 Engine cover 13 Split cover 15 Guide rail (guided member) 18 Lock mechanism

 ──────────────────────────────────────────────────の Continuing on the front page (72) Inventor Tomohiko Yasuda 650 Kandate-cho, Tsuchiura-shi, Ibaraki Pref.Hitachi Construction Machinery Co., Ltd. (72) Inventor Fumiyasu Watanabe 650 Kandamachi, Tsuchiura City, Ibaraki Prefecture Hitachi Construction Machinery Co., Ltd.

Claims (4)

[Claims] 1. A construction machine comprising: a frame constituting a vehicle body; an engine provided on the frame; and a building cover provided on the frame for accommodating the engine. Is provided with an opening for engine inspection, a guide member is provided along the opening at a position near the opening, and above the building cover, between an open position where the opening is opened and a closed position where the opening is closed. The construction machine according to claim 1, wherein an engine cover that moves in the horizontal direction is provided, and a guided member guided in the horizontal direction by the guide member is provided on the engine cover. 2. The construction machine according to claim 1, wherein the engine cover is constituted by a plurality of divided covers approaching and separating from each other along the guide member. 3. One of the guide member and the guided member is constituted by a guide rail extending in the horizontal direction along the opening, and the other of the guide member and the guided member is rolled along the guide rail. The construction machine according to claim 1, wherein the construction machine includes a moving roller. 4. The construction machine according to claim 2, wherein a lock mechanism for holding each of the divided covers in a closed state is provided between each of the divided covers.