JP2008231697A - Cover device of turning type working machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To increase rigidity by eliminating a huge portion of a cover body on the upside of a side cover, and to facilitate an opening/closing operation. <P>SOLUTION: This cover device comprises the side cover 16 which is attached to a side portion of a base 15 on the front side of one side portion of a counterweight 14 of a swivel base 2, and the cover body 4 which is arranged on the front side of one side portion of a hood 17 and on the upside of the side cover 16. An upper edge 16a of the side cover 16 and a lower edge 4a of the cover body 4 are formed in such a shape as to be inclined upward to the rear from the front, and brought closer to an upper edge 14a of a front side portion of the counterweight 14. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a cover device for a turning work machine such as a backhoe.

The upper structure of the swivel work machine comprises a swivel frame by fixing the swivel frame on a base that is supported by the travel frame of the crawler travel device so as to be pivotable about the swivel axis. A weight, oil tank, fuel tank, etc. are mounted on the left and right sides, the upper surface of the swivel base is a step, and a driver seat or a cabin having a driver seat is placed, and a bonnet that covers the engine, an oil tank A tank cover (cover body) that covers the side, a side cover that covers the side surface of the swivel base, and the like.
The side cover is attached to the side of the base on the front side of one side of the counterweight, and is provided on the lower side of the tank cover arranged on the front side of one side of the bonnet. It is formed in a rectangular shape (for example, see Patent Document 1).
JP 2005-315051 A

Since the left and right sides of the counterweight are likely to interfere with obstacles when turning, the swivel work machine tends to protrude upward and serve as a protector part or a protector mounting part for attaching a separate protector. The lower edge extends from the top of the protector portion of the counterweight to the upper surface of the side cover and then extends forward, and the upper side portion of the side cover of the tank cover has a large vertical dimension.
The tank cover is opened and closed at the time of maintenance and inspection, and is preferably lightweight and easy to open and close.However, if the distance from the upper surface to the side cover is long, the opening area becomes large, but the rigidity of the part where the distance is long is increased. This causes a problem that the opening / closing operation becomes difficult.

An object of this invention is to provide the cover apparatus of the turning working machine which enabled it to solve such a problem of a prior art.
In the present invention, by forming the upper edge of the side cover to be inclined upward from the front to the rear, the cover body can be formed without greatly lowering the lower edge on the front side of the counterweight, and the rigidity of the cover body is eliminated by eliminating the long part of the cover body. An object of the present invention is to provide a cover device for a swing work machine that is improved and can be easily opened and closed.

Specific means for solving the problems in the present invention are as follows.
First, a side cover 16 attached to the side of the base 15 at the front side of the counterweight 14 of the swivel base 2 and a front side of the side of the bonnet 17 and above the side cover 16 are arranged. A swivel work machine cover device provided with a cover body 4 comprising:
The upper edge 16a of the side cover 16 and the lower edge 4a of the cover body 4 are inclined upward from the front to the rear, and are close to the upper edge 14a of the front side portion of the counterweight 14.

Second, the rear lower edge 16b of the side cover 16 is disposed on the upper surface of the base 15, and protrudes downward from the rear lower edge 16b from the front end of the side cover 16 to the front of the rear lower edge 16b. An extension 18 is formed that overlaps with the base 15.
The side cover 16 is characterized in that the vertical dimension H in front of the rear end 18a of the extension 18 is set to be the same as the vertical dimension H from the lower edge 16b to the upper edge 16a of the cover rear end 16c. To do.
Third, the side cover 16 has a rear lower edge 16b and an extension lower edge 18b formed horizontally, and a rear end of the upper edge 16a is substantially continuous with a front side upper edge 14a of the counterweight 14. And

Fourth, the side cover 16 is characterized in that the cover rear end 16c overlaps with the front side front edge 14b of the counterweight 14 inwardly and outwardly and is inclined rearward from the bottom upward. .
The cover device configured as described above has the following effects.
The upper edge 16a of the side cover 16 is inclined upward from the front to the rear and is close to the upper edge 14a of the front side portion of the counterweight 14. Accordingly, the lower edge 4a of the cover body 4 is also upward from the front to the rear. The cover body 4 is inclined and close to the upper edge 14 a of the front side portion of the counterweight 14, and the lower edge 4 a of the cover body 4 does not have a downward bulge that is greatly lowered on the front side of the counterweight 14. There is no major part in the middle part, thereby improving the rigidity and facilitating the opening / closing operation.

The side cover 16 has an extended portion 18 overlapped with the base 15 and the rear lower edge 16b is disposed on the upper surface of the base 15, so that the upper edge 16a of the side cover 16 is an upper edge from the rear lower edge 16b. With the height set by the vertical dimension H up to 16a, the cover body 4 arranged thereon can be arranged at the required height, and there is an extension 18 projecting downward from the rear lower edge 16b, There is no mistake in the model to be installed.
The side cover 16 has a vertical dimension H on the front side of the rear end 18a of the extension 18 that is set to be the same as a vertical dimension H from the rear lower edge 16b to the upper edge 16a of the cover rear end 16c. When the vertical dimension H is cut at the same position, it becomes a side cover having front and rear dimensions from the front end to the cutting position. When the lower edge of the rear end 18a of the extension 18 is arranged on the upper surface of the base 15, the cover body 4 is It is possible to apply to different types of turning work machines arranged at the same height as described above.

Since the rear end of the upper edge 16a of the side cover 16 is substantially continuous with the upper edge 14a of the counterweight 14, the lower edge 4a of the cover body 4 reaches from the counterweight 14 to the side cover 16. A large step is not formed in the part, and the vertical dimension of the cover body 4 can be reduced to prevent a decrease in rigidity.
The cover rear end 16c of the side cover 16 and the front side front edge 14b of the counterweight 14 are overlapped inward and outward and formed to be inclined rearward from the bottom to the front, so that the front and rear sides of the side cover 16 are assembled. Alignment in the direction, the up-down direction, and the inside-outside direction becomes easy.

  According to the present invention, the cover body on the upper side of the side cover can be formed without greatly lowering the lower edge on the front side of the counterweight, and the length of the cover body can be eliminated to improve the rigidity and facilitate the opening / closing operation.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1, 12, and 13, reference numeral 21 denotes a backhoe as a turning work machine, and an upper structure thereof is mounted on a base 15 that is supported by a traveling frame 23 of a crawler traveling device 22 so as to be rotatable around a turning shaft 24. The swivel frame 25 is fixed to constitute the swivel base 2, and the engine 26 and the counterweight 14 are mounted on the rear part of the swivel base 2, and the oil tank 27, the control valve 28, and the like are mounted on the left and right side parts (right side part). The upper surface of the swivel base 2 is set as step 29 and the cabin 30 having the driver's seat and the control device is placed.

The backhoe 21 includes a hood 17 that covers the engine 26, a part of the engine 26, a cover body (tank cover) 4 that covers a structure 3 such as an oil tank 27, a control valve 28, and a side cover 16 that covers the side surface of the swivel base 2. Etc. The cover body 4 is further covered with a cap body 5, and the cover device 1 is constituted by the cover body 4, the cap body 5, the side cover 16, the bonnet 17, and the like.
The swivel base 2 has a substantially frame-shaped vertical frame in plan view and a swivel frame 25 having a bracket for mounting the engine 26 and other structures 3 fixed on the base 15, and the front end of the C-shaped vertical frame. A swing bearing member 31 that supports the excavator 40 so as to be swingable about the swing axis is fixed, and a swivel joint constituting the swivel shaft 24 is disposed at the center.

The counterweight 14 is formed of a casting, and extends from the rear end of the swivel base 2 to the rear portion of the left and right side portions, and the front end of the right side portion thereof is connected to the side cover 16 in a substantially flush manner. A protector 32 that protrudes upward and covers the rear portion of the cover body 4 is attached to the left and right sides of the counterweight 14.
The bonnet 17 is pivotally supported by a support frame 34 for placing and supporting the rear portion of the cabin 30 via a horizontal shaft 35 so that the bonnet 17 can be opened and closed. The right end of the bonnet 17 is arranged continuously with the cover body 4. The outer surface of the rear portion of the cover body 4 is substantially flush with the side cover 16, and the outer surface of the rear portion of the side cover 16 is substantially flush with the right side portion of the counterweight 14.

In FIGS. 1 to 7, the cover body 4 and the side cover 16 are made of sheet metal, and the side cover 16 is screwed to the swivel base 2, whereas the front and lower ends of the cover body 4 are pivotal support 36. The rear upper end can be locked to the support frame 34 or the structure 3 via a locking tool 37, and the oil tank 27, control valve The structure 3 such as 28 can be opened and closed for maintenance.
The cover body 4 has a top surface, a front surface, and left and right side surfaces, and a bottom surface and a back surface are open. A cross-sectional front shape and a cross-sectional planar shape are U-shaped. The divided members 4L and 4R are joined to each other.

The left split material 4L on the cabin 30 side (inward side) is integrally formed with a semi-upper surface portion A, a semi-front surface portion B, and a left-side surface portion L. The half front part B and the right side part R are integrally formed.
Each of the left and right divided members 4L and 4R has a bulging portion 11 formed from the semi-upper surface portion A to the upper portion of the semi-front surface portion B, and a flange projecting upward by bending the end portion of the bulging portion 11 on the dividing surface P side. 6a and 6b are formed, and the flange joint portion 6 is formed by joining the flanges 6a and 6b by welding or the like.

Since the flanges 6a and 6b protrude from the main body portions of the divided members 4L and 4R, even if they are welded, the main body portions are not adversely affected by welding distortion or the like, and a strong welding side is possible. The part 6 serves as a rib and improves the shape retention strength of the cover body 4.
The left and right divided members 4L, 4R are formed with overlapping edges 7a, 7b on the half front surface portion B. The overlapping edges 7a and 7b are bent so that one side is flat and the other is arranged inside thereof, and are positioned one step inside. By overlapping the overlapping edges 7a and 7b by welding or the like, the overlapping portion is joined. 7 is formed.

Each of the left and right divided members 4L and 4R is formed with a notch between the flanges 6a and 6b so that the overlapping edges 7a and 7b are bent and welded easily. The notch is an opening 8 between the flange joint 6 and the overlap joint 7.
The flange joint portion 6 protrudes in a substantially chicken crown shape at the center of the bulging portion 11, and a concave notch 10 is formed near the front portion.
The cap body 5 is made of synthetic resin and is integrally formed in a shape that covers the left and right bulged portions 11 including the flange joint portion 6 and the opening portion 8, and is screwed from the inner surface of the cover body 4. The cap body 5 is provided with a plurality of protrusions 5a extending in the front-rear direction on the lower surface thereof, and one or a plurality of protrusions 5b extending in the front-rear direction.

The protrusions 5a and 5b constitute reinforcing ribs of the cap body 5, and the protrusion 5a in the left-right direction is orthogonal to the flange joint 6 so that the lower surface thereof is fitted into the flange joint 6. A concavity 9 is formed. Although the width of the concave portion 9 is larger than the thickness of the flange joint portion 6, the cap body 5 can be positioned in the left-right direction by fitting into the flange joint portion 6, so that the cap body 5 can be easily attached. It has become.
Further, the protrusion 5a facing the notch 10 of the flange joint portion 6 is not formed with a portion corresponding to the recess 9 and can be directly fitted to the notch 10, and this fitting allows the front and rear of the cap body 5 to be fitted. The direction can be positioned, and the cap body 5 can be easily attached. The positioning of the cap body 5 does not have to be accurate, and may be a rough one with looseness.

The front lower parts of the left and right divided members 4L, 4R of the cover body 4 bulge from the portion where the cap body 5 is arranged, and are formed so that the front surface of the covered cap body 5 and the surface are continuous.
The protrusion 5a is formed with a protrusion or protrusion separately from the reinforcing rib of the cap body 5, and is fitted with the notch 10, and a recess 9 is formed at the tip of the protrusion or protrusion to form a flange. The cap body 5 may be positioned in the front / rear / right / left direction by fitting with the joint portion 6.
A concave portion shallower than the concave portion 9 is formed in the protrusion 5a facing the notch 10, and the cap body 5 is positioned in both the front-rear direction and the left-right direction by fitting the notch 10 and the concave portion. Also good. The notches 10 may be provided at a plurality of locations on the flange joint 6.

1 and 8 to 10, the lower edge 4a of the cover body 4 and the upper edge 16a of the side cover 16 are arranged in parallel and close to each other, and they are formed to be inclined upward from the front to the rear. The lower edge of the side cover 16 is disposed substantially horizontally. The upper edge 16a of the side cover 16 is bent in an L shape from the main body portion and is formed on a flat surface.
The rear lower edge 16b of the side cover 16 is disposed on the upper surface of the base 15. From the front end of the side cover 16 to the front of the rear of the side cover 16 below the rear lower edge 16b, the rear lower edge 16b is lower than the rear lower edge 16b. An extension 18 is formed so as to protrude to the base 15 and overlap the base 15.

The rear lower edge 16b and the extension lower edge 18b of the side cover 16 are bent horizontally from the main body portion in an L shape, and the rear end of the upper edge 16a is connected to the front upper edge 14b on one side of the counterweight 14. It is arranged at a substantially continuous height.
Reference numeral 19 shown in FIGS. 1 and 9 is an L-shaped rear stay projecting laterally from the base 15, and the rear lower edge 16 b and the body portion of the side cover 16 are fastened to the rear stay 19 with bolts or the like. It is fixed through tools. Reference numeral 16d denotes a hole in the main body portion through which the fastener is inserted.
A reference numeral 20 shown in FIGS. 1 and 10 is a front stay projecting laterally from the base 15 and is configured by providing a spacer portion 20b on the lower surface of the band plate 20a. The extension lower edge 18b is fixed through a fastener such as a bolt.

Since the front stay 20 includes the spacer portion 20b, the extension lower edge 18b can be disposed at a position overlapping the base 15, and the extension lower edge 18b can be attached and supported one step lower than the rear lower edge 16b. . Further, the side cover 16 has a U-shaped cross-sectional front shape and is arranged to protrude outward from the base 15.
The upper edge 16a of the side cover 16 does not have to be completely continuous with the front edge 14b of the counterweight 14. However, if the height difference between the edges 16a and 14b is small, the lower edge of the cover body 4 4a decreases the amount of the portion extending from the front side upper edge 14b of the counterweight 14 to the upper edge 16a of the side cover 16 and the vertical dimension of the cover body 4 at the midway in the front-rear direction is shortened. The cover body 4 can be made smaller and lighter to improve rigidity and facilitate manufacture.

The cover rear end 16c of the side cover 16 is disposed so as to overlap the front side portion front edge 14b of the counterweight 14 in the inner and outer directions, and is formed to be inclined rearward from the bottom to the top. The side cover 16 is mounted after the counterweight 14 is fixed to the base 15, and at the time of mounting, the front side front edge 14 b of the counterweight 14 serves as a positioning reference in the front-rear direction and the left-right direction. Mounting is facilitated by the fact that the edge 14b is inclined backward.
In the side cover 16, the vertical dimension H from the lower edge 16b to the upper edge 16a of the cover rear end 16c is substantially set to the distance from the upper surface of the base 15 to the lower edge 4a of the cover body 4, and an extension portion The vertical dimension in front of the rear end 18a is set to be the same as the vertical dimension H.

As described above, the lower edge 4 a of the cover body 4 and the upper edge 16 a of the side cover 16 are inclined upward from the front to the rear, and the upper edge of the rear end of the side cover 16 is brought close to the height of the counterweight 14. When the distance from the upper surface to the lower edge 4a in the front and rear halfway is shortened, unlike a conventional rectangular strip cover body, a long cover is formed with a single mold and then cut. Therefore, it becomes difficult to use it for a plurality of types having long and short dimensions.
That is, in a turning work machine such as a backhoe, a standard machine having a long distance from the turning shaft 24 to the rear end of the counterweight 14 as shown in FIGS. There is a small rear swivel machine or the like that is not greatly protruded from the width of the crawler traveling device 22 even if it is turned short, and the front and rear dimensions of the swivel base 2 are different even if the machines have the same horsepower.

The rear small swivel shown in FIG. 11 has a shorter swivel base 2 than the standard machine, but the cover body 4, cap body 5, counterweight 14 and bonnet 17 are the same as the standard machine shown in FIGS. Are commonly used, and the side cover 16 also uses the standard side cover 16 in common.
The side cover 16 of the standard machine has a vertical dimension H on the front side of the rear end 18a of the extension portion that is the same as a vertical dimension H from the lower edge 16b to the upper edge 16a of the cover rear end 16c. When the side cover 16 of the standard machine is cut (the cutting line S is shown in FIG. 8) from the front end arrangement position of the side cover 16 to the front side front edge 14a of the counterweight 14, the vertical dimension of the rear end is The vertical dimension H is obtained. Further, the projecting dimension of the extension 18 is determined so that the vertical dimension of the rear end becomes the vertical dimension H.

In this way, the side cover 16 formed for the rear small turning machine by cutting the side cover 16 of the standard machine prepares a stay of only the belt plate 20a without the spacer portion 20b of the front stay 20, and its front. At the stay, the lower edge 18 b of the extension 18 is placed horizontally and substantially at the same height as the upper surface of the base 15. The rear stay may be fixed to the lower edge 18b of the extension 18 and the main body portion via a fastener using the rear stay 19 of a standard machine.
Reference numerals 16e shown in FIGS. 8 and 11 indicate holes through which the fasteners for the small rear swivel are inserted. The vertical position relationship between the base 15 and the cover body 4 and the front-rear position relationship with the counterweight 14 are holes. It is the same as 16d.

Thus, in the small rear swivel machine, the upper edge 16a of the side cover 16 is arranged in parallel and close to the lower edge 4a of the cover body 4, and is substantially continuous with the upper edge 14b of the front side portion of the counterweight 14. The height of the upper surface can be the same as that of the standard machine, and each cover of the cover device 1 can be used in common even if the front and rear dimensions of the swivel base 2 are different between the standard machine and the small rear swirler. .
In the present invention, the shape of each member and the positional relationship between the front, rear, left, and right in the embodiment are best configured as shown in FIGS. However, it is not limited to the said embodiment, A member, a structure can be variously deformed, and a combination can also be changed.

For example, if only the upper edge 16a of the side cover 16 is substantially continuous with the front edge 14b of the counterweight 14, a dedicated side cover 16 may be used for the standard machine and the rear small turning machine. The cover body 4 may be formed of a synthetic resin if it is used in common.
Further, the upper edge 16a of the side cover 16 and the front side upper edge 14a of the counterweight 14 may be made substantially flush with each other.

It is a side view which shows embodiment of this invention. It is a side view of a cover body and a cap body. It is a top view of a cover body and a cap body. It is a cover body and a cap body exploded side view. It is a top view of only a cover body. It is an enlarged plan view of the front part of a cover body. It is a perspective view of a flange joint part and a superposition joint part. It is a side view of a side cover. It is the XX sectional view taken on the line of FIG. It is the YY sectional view taken on the line of FIG. It is a side view which shows the cover apparatus of a back small turning machine. It is a side view of the whole backhoe. It is a perspective view of the whole backhoe.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Cover apparatus 2 Rotating base 3 Structure 4 Cover body 4a Lower edge 5 Cap body 14 Counterweight 15 Base 16 Side cover 17 Bonnet 18 Extension part

Claims (4)

A side cover (16) attached to the side of the base (15) on the front side of one side of the counterweight (14) of the swivel base (2), and a front side and side cover of one side of the bonnet (17) (16) a cover device for a turning work machine provided with a cover body (4) disposed on the upper side,
The upper edge (16a) of the side cover (16) and the lower edge (4a) of the cover body (4) are inclined upward from the front to the rear, and are formed on the upper edge (14a) of the front side of the counterweight (14). A cover device for a swivel working machine, characterized in that they are close to each other. The rear lower edge (16b) of the side cover (16) is disposed on the upper surface of the base (15), and extends from the front end of the side cover (16) to the front of the rear lower edge (16b). ), And an extension portion (18) that overlaps with the base (15) is formed.
The side cover (16) has a vertical dimension (H) in front of the rear end (18a) of the extension portion (18) from the lower edge (16b) to the upper edge (16a) of the cover rear end (16c). 2. The cover device for a swing work machine according to claim 1, wherein the cover device is set to have the same vertical dimension (H).   The side cover (16) has a rear lower edge (16b) and an extension lower edge (18b) formed horizontally, and the rear edge of the upper edge (16a) is the upper edge (14a) of the front side of the counterweight (14). 3. The cover device for a swivel working machine according to claim 2, wherein the cover device is substantially continuous.   The side cover (16) is formed such that the rear end (16c) of the cover overlaps the front edge (14b) of the front side of the counterweight (14) inward and outward, and is inclined rearward from the bottom upward. The cover device for a turning work machine according to claim 2 or 3, characterized in that.

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