JP2003020680A - Bonnet for turning working vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve a mounting structure and a mounting procedure for a bonnet and reduce a manufacturing cost and assembling man-hours. SOLUTION: This bonnet covering an engine and the like in the turning working vehicle is constructed of left and right side part bonnets 15L and 15R and a center bonnet 15C, and the center bonnet 15C is laterally turned to be opened. A mounting stay 17 and a locking stay 18 for supporting and fixing both sides of the center bonnet 15c are installed to a seat mount 16 on the body side, and to both of the stays, the center bonnet 15C is positioned to be installed. Subsequently, the left and right side part bonnets 15L and 15R are positioned to the stays to be installed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an upper revolving structure of a crawler-type revolving work vehicle, and more particularly to a bonnet mounting structure.

[0002]

2. Description of the Related Art Conventionally, an engine, a battery, a fuel tank, etc. are arranged on a revolving structure of a revolving work vehicle, and these are covered with a bonnet. It is known that the bonnet has an integral structure that covers the side and rear portions, a door that allows only the rear portion to be opened, and one that is divided into a plurality of pieces.
When the bonnet is divided into a plurality of bonnets, the left bonnet, the central bonnet, and the right bonnet are made up of three bonnets, and when the central bonnet is configured to open and close to the left and right, the bonnets are separately attached to the main body side. Of.

[0003]

However, in the conventional mounting structure, if the respective bonnets are not mounted accurately, the gap between the bonnets or between the bonnets and the adjacent cover or frame, or the bonnet becomes large. There was a step between the car and the hood. In order to eliminate these gaps and steps, the bonnets must be repositioned and mounted again, which makes the mounting work extremely troublesome.

In view of the above problems, the present invention reviews the mounting structure and mounting procedure of the bonnet to reduce the manufacturing cost and the number of assembling steps.

[0005]

The problems to be solved by the present invention are as described above, and the means for solving the problems will be described below. That is, as described in claim 1, the bonnet of the turning work vehicle for covering the engine and the like is configured by the left and right side bonnets and the central bonnet, and the central bonnet is opened laterally in the central bonnet. Attach a stay that supports and fixes both sides of the, and position and attach the central bonnet to the stay,
Next, the left and right side bonnets are positioned and attached to the stay.

According to a second aspect of the present invention, the bonnet of the turning work vehicle for covering the engine and the like is composed of the left and right side bonnets and the central bonnet, and the central bonnet is opened laterally in the central bonnet. And the left and right side bonnets are attached to a seat mount to form an integrated bonnet mechanism, and the bonnet mechanism is placed and fixed on a turning frame.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION Next, an embodiment of the present invention will be described with reference to the drawings. 1 is an overall side view of the swing work vehicle of the present invention, FIG. 2 is a rear perspective view of the swing structure, FIG. 3 is a partial plan view in the vicinity of a mounting stay, and FIG. FIG. 5 is a diagram showing the configuration of the mounting portion of the central bonnet, and FIG. 6 is a diagram showing a state in which each bonnet and the seat mount are assembled into an assembly.

First, as an embodiment of the present invention, a structure of a turning work vehicle equipped with a crawler type traveling device will be described. FIG. 1 shows a turning work vehicle equipped with the bonnet structure of the present invention. In the swivel work vehicle, a swivel base bearing 7 is arranged in the upper center of the crawler type traveling device 1, and a swivel body 8 is supported by the swivel base bearing 7 so as to be rotatable left and right. At the front and rear ends of the crawler type traveling device 1, an earth discharging plate 10 is arranged so as to be vertically rotatable.

The revolving structure 8 has an engine mounted on a turning frame 11 serving as a base, and covers the engine, a battery and the like with a bonnet 15 of the present invention described later, and a canopy 21 is arranged above the bonnet 15. Is configured. The boom bracket 12 is attached to the front end of the swing body 8 so as to be rotatable left and right, and the lower end of the boom 6 is pivotally supported so as to be vertically rotatable. A base of an arm 5 is pivotally supported on the tip of the boom 6, and a device such as a bucket 4 is mounted on the tip of the arm 5. The lower end of the boom cylinder 23 is rotatably supported by the boom bracket 12, and the boom 6 is expanded and contracted to rotate the boom 6 with respect to the boom bracket 12. An arm cylinder 25 is provided above the boom 6.
The arm 5 rotates with respect to the boom 6 by the expansion and contraction of the arm cylinder 25. A bucket cylinder 24 is arranged at the base of the arm 5, and the bucket 4 is connected to the tip of the bucket cylinder 24 via a link mechanism. The bucket 4 is rotatably supported at the tip of an arm 5, and is rotated with respect to the arm 5 by expanding and contracting the bucket cylinder 24.

The rear portion of the turning frame 11 is composed of a counterweight portion 11c, and a side cover 46 is arranged in front of the counterweight portion 11c, and a control valve and a control valve are provided in a space covered by the side cover 46. , Swivel joint, etc. are installed.

FIG. 2 shows the components of the rear part of the revolving structure 8. 11 is a turning frame, 15L is the left side bonnet (hereinafter left bonnet), 15R is the right side bonnet (hereinafter right bonnet), and 15C is. It is a central bonnet and 16 is a seat mount. The seat mount 16 is configured in a four-legged table shape, and a seat (not shown) is fitted in a range where the central portion of the top plate is hollowed out, and the lower portion of the four-legged portion is fixed to the turning frame 11. The front part is supported by the boss 33. A mounting stay 17 is mounted on the rear surface of the left rear leg, and a lock stay 18 is mounted on the rear surface of the rear right leg.
In FIG. 2, for convenience of description, the mounting stay 1
7, an enlarged view of the lock stay 18, the opening and closing stay 27 is shown.

Next, the respective constituent members will be described in detail. As shown in FIG.
6, a fixed surface 17a that abuts and fixes 6 on the surface, and a mounting surface 17b that abuts and fixes the rear portion of the left bonnet 15L.
And the connecting surface 17c that intersects the end surface at a right angle with the fixed surface 17a and the mounting surface 17b form a staircase shape (FIG. 3) in plan view, and the mounting surface 17b and the connecting surface 17c are vertically central and lower. From the above, the arms 26, 26 having the pivotal connection holes 26a, 26a are attached to the mounting surface 17b and the connecting surface 17c.
Extending to the acute angle side composed of
The pivoting portions 28 of the opening / closing stay 27 are axially mounted on a. Further, from the upper part of the connecting surface 17c, a stay 32a is provided, which is provided with a restriction pin 29a protruding upward, to restrict the opening / closing angle of the central bonnet 15C (the restriction of the opening / closing angle will be described later). . Further, the through holes 3 are formed at two positions in the vertical direction on the fixed surface 17a.
5.35 is bored to enable bolting to the bolt hole provided on the seat mount 16 side, while mounting surface 1
7b has through holes 36, 36 formed at two positions in the vertical direction, and the back side surface of the through holes 36, 36 (the left bonnet 15L
Nuts 37, 37 are welded and fixed to the surface (that becomes the surface) (FIG. 3).

Next, as shown in FIG. 2, the lock stay 18 is a fixed surface 18 that is brought into surface contact with the seat mount 16.
a, two mounting surfaces 18b, 18b that come into surface contact with the right bonnet 15R, a fixed surface 18a, and a mounting surface 18b.
The connecting surface 18c connecting the 8b forms a staircase shape (FIG. 4) in a plan view, and a bar-shaped lock arm 19 having a "U" shape in rear view is formed from the upper part to the lower part of the fixed surface 18a. There is. The hook 2 of the lock arm 19 which will be described later
The engaging portion of 0 is arranged at a position that is floated (away from the rear) with respect to the mounting surface 18b, and as shown in FIG. It is designed to form a space.
Further, through holes 38, 38 are formed in the fixing surface 18a at two positions in the vertical direction so that bolts can be bolted to the bolt holes provided on the seat mount 16 side, while the mounting surfaces 18b, 18b. Through holes 39, 39, respectively.
The nuts 40 and 40 are welded and fixed to the surface 5R) (FIG. 4).

Next, the structure of the bonnet will be described. First, as shown in FIG. 2, the central bonnet 15C
Has a substantially rectangular shape when viewed from the rear and covers the space between the rear upper surface of the seat mount 16 and the rear upper surface of the turning frame 11, and an opening / closing handle 48 is disposed on the right hand side in the rear surface. As shown in FIG. 4, the opening / closing handle 48
A hook 20 is formed on the back side of the hook 20, and the hook 20 is locked to the lock arm 19 of the lock stay 18, or
The central bonnet 15C is opened and closed by releasing the locking. In addition, as shown in FIGS. 3 and 5, on the rear surface on the left side in rear view, which is the opposite side of the opening / closing handle 48, a “U” -shaped support portion is provided at a position separated from the side end surface of the central bonnet 15C toward the center side. 42, the mounting surface 27a of the opening / closing stay 27 is fixed to the supporting portion 42. The opening / closing stay 27 is formed in a U shape in plan view so that the rear end portion of the left bonnet 15L described later can be inserted even when the central bonnet 15C is closed. Further, a stay 32b having a restriction pin 29b protruding upward is fixed to the upper surface of the support portion 42.

Next, as shown in FIG. 2, the left hood 1
5L covers the rear part of the left side of the seat mount 16, and the side bar 51, which assists the operator getting on and off, is raised from the rear part upward and bent forward to form a horizontal part. It is bent downward and fixed at the lower front. Further, an oil gauge window 52 is formed on the left side surface,
The amount of hydraulic oil is visible from the outside. The lower front end of the left bonnet 15L is fixed to the seat mount 16 with bolts or the like. Then, the end surface 57 on the side of the central bonnet 15C
In the vicinity of L, two mounting holes 53, 53 are provided at upper and lower positions, and the periphery of the mounting holes 53, 53 is recessed from the exterior surface to embed the head of the mounting bolt described later. The head is kept out of contact with the outside.

Further, as shown in FIG. 3, the end surface 57L on the side of the central bonnet 15C is bent toward the seat mount 16 (inside the central bonnet 15C) in plan view. It is configured so as to enter between the end surface of the central bonnet 15C and the pivotal portion to reduce the gap and
The inside is hidden from the outside.

Next, as shown in FIG. 2, the right hood 1
5R is configured to cover the right-hand rear portion of the seat mount 16, and like the left bonnet 15L, a side bar 51 is formed and mounting holes 54, 54 are formed.

Further, as shown in FIG. 4, the end surface 57R on the side of the central bonnet 15C also has a plan view in the same manner as described above.
Seat mount 16 side (inside the central hood 15C)
It is bent to.

Bonnet 15C constructed as described above
15L / 15R and mounting stay 17 / lock stay 18
In the main body side (seat mount 16), a stay (mounting stay 1) for supporting and fixing both sides of the central bonnet 15C is attached.
7 and the lock stay 18), the central bonnet 15C is positioned and attached to the stay, and then the left and right side bonnets 15L and 15R are positioned and attached to the stay.

The mounting procedure will be described in detail below. First, the mounting stay 17 having the opening / closing stay 27 mounted on the seat mount 16 is mounted. Then, as shown in FIG. 5, the support portion 42 on the back side of the central bonnet 15C is fixed to the mounting surface 27a of the opening / closing stay 27, and the central bonnet 15C is attached to the mounting stay 17 so as to be openable and closable. Further, a regulation arm 44 having a long hole is bridged between the regulation pin 29b of the stay 32b and the regulation pin 29a of the stay 32a on the mounting stay 17 side to regulate the opening / closing angle of the central bonnet 15C. I have to.

The inclination of the central bonnet 15C thus mounted is adjusted by adjusting the angle at which the support portion 42 is fixed to the open / close stay 27. The angle may be adjusted so that the central bonnet 15C is closed and is horizontal when viewed from the rear surface. When adjusting the angle, open the central bonnet 15C and loosen the bolts 27c and 27c from the back side. It can be easily done just by fastening.

Next, the mounting of the lock stay 18 will be described. As shown in FIG. 4, the hook 20 on the back side of the central bonnet 15C is locked to the lock arm 19 or brought close to the lock arm 19 so that the lock stay 18 can be locked. While adjusting the bolt 62 by loosening it from the gap between 18 and the central bonnet 15C, the hook 20 and the lock arm 19 are tightened and fixed in an optimal engagement state.

Next, the mounting of the left bonnet 15L will be described. As shown in FIG. 3, the end surface 57L of the left bonnet 15L is inserted into the inside of the end surface 15CT of the central bonnet 15C, and the mounting hole 53 is attached to the nut 37 of the mounting stay 17. Left bonnet 15L so that it matches the position of
This is performed by bringing the inner surface of the above into contact with the mounting surface 17b, inserting the mounting bolt 58 from the outside, and fastening it to the nut 37. Also, the end face 57L of the left bonnet 15L
Since it is configured to fit inside the central bonnet 15C, no gap is formed between the central bonnet 15C and the central bonnet 15C (while comparing each other), the left bonnet 15L is attached. The angle can be adjusted.

As described above, the work for mounting the left bonnet 15L and the adjustment of the mounting angle can be easily performed by fastening the mounting bolt 58 from the outside of the left bonnet 15L.

Similarly, when mounting the right bonnet 15R, as shown in FIG. 4, the end surface 57 of the right bonnet 15R is attached.
R is inserted into the inside of the end surface 15CR of the central bonnet 15C, the mounting hole 54 is aligned with the position of the nut 40 of the lock stay 18, the inner surface of the right bonnet 15R is brought into contact with the mounting surface 18b, and mounted from the outside. Bolt 59
Is carried out and is fastened to the nut 40. Here, since the end face 57R of the right bonnet 15R is configured to be inserted inside the central bonnet 15C, no gap is formed between the right bonnet 15R and the central bonnet 15C, and the end face 57R is in the form of the central bonnet 15C. While, the mounting angle of the right bonnet 15R can be adjusted.

As described above, the work for mounting the right bonnet 15R and the adjustment of the mounting angle can be easily performed by fastening the mounting bolt 59 from the outside of the right bonnet 15R.

Further, with the above configuration, the following mounting procedure can be improved. That is, as shown in FIG. 6, an attachment stay 17 (not shown) and a lock stay 18 (not shown) are attached to the seat mount 16 in advance off-line with respect to the assembly line, and the left hood 15L is further attached.
-The center bonnet 15C and the right bonnet 15R are attached to form the bonnet mechanism 90 in which the attachment angle is adjusted, and the bonnet mechanism 90 is attached to the turning frame 11 in the manufacturing line. Is simplified, and detailed work on the manufacturing line (adjustment of bonnet mounting angle, etc.) can be omitted. In addition, this off-line assembly is performed with the seat mount 16 and each bonnet 15C.
It is realized by the mutual relation of the shapes of 15L and 15R and the turning frame 11.

Further, focusing on the number of parts, as described above, the left stay hood 15L and the center hood 15C are attached to the mounting stay 17 (including the opening / closing stay 27), and the center hood 15C is attached to the lock stay 18. Since the hook 20 is locked and the right bonnet 15R is mounted with a small number of parts, the manufacturing cost can be reduced.

[0029]

Since the present invention is constructed as described above, it has the following effects. That is, as described in claim 1, the hood of the turning work vehicle that covers the engine,
In the configuration in which the left and right side bonnets and the central bonnet are configured and the central bonnet is opened laterally, a stay for supporting and fixing both sides of the central bonnet is attached to the main body side, and the central bonnet is positioned with respect to the stay. Since the mounting and then the left and right side bonnets are positioned and mounted on the stay, the positioning can be performed easily and the mounting angle can be easily corrected for each bonnet.

According to a second aspect of the present invention, the bonnet of the revolving work vehicle for covering the engine and the like is composed of the left and right side bonnets and the central bonnet, and the central bonnet is opened laterally in the central bonnet. And the left and right side bonnets are attached to the seat mount to form an integrated bonnet mechanism, and the bonnet mechanism is placed and fixed on the turning frame.Because the bonnet mechanism is adjusted offline in advance, the mounting angle of each bonnet is adjusted. Can be assembled as an assembly to the turning frame in the manufacturing line, which simplifies the mounting procedure and also enables detailed work in the manufacturing line (adjustment of the mounting angle of the bonnet). Etc.) can be omitted.

[Brief description of drawings]

FIG. 1 is an overall side view of a turning work vehicle of the present invention.

FIG. 2 is a rear perspective view of a revolving structure.

FIG. 3 is a partial cross-sectional plan view of the vicinity of a mounting stay.

FIG. 4 is a partial plan view of the vicinity of the lock stay.

FIG. 5 is a diagram showing a configuration of a mounting portion of a central bonnet.

FIG. 6 is a view showing a state in which each bonnet and a seat mount are assembled into an assembly.

[Explanation of symbols]

15C central bonnet 15R Right hood 15L left hood 17 Mounting stay 18 Rock stay

Claims (2)

[Claims] 1. A bonnet of a revolving work vehicle for covering an engine or the like is configured by left and right side bonnets and a central bonnet, and the central bonnet is opened laterally by rotation.
A swing characterized in that a stay for supporting and fixing both sides of the central bonnet is attached to the main body side, the central bonnet is positioned and attached to the stay, and then the left and right side bonnets are positioned and attached to the stay. The hood of a work vehicle. 2. A bonnet of a revolving work vehicle for covering an engine or the like is configured by left and right side bonnets and a central bonnet, and the central bonnet is opened laterally by rotation.
A bonnet for a revolving work vehicle, characterized in that a central bonnet and left and right side bonnets are attached to a seat mount to form an integrated bonnet mechanism, and the bonnet mechanism is mounted and fixed on a turning frame.