JP2938782B2 - Backhoe bonnet structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hood structure for a backhoe, and more particularly, to an engine disposed at a rear portion of a swivel base and tanks disposed at one lateral side of a front portion of the swivel base to provide the engine and the tank. The hood structure of the backhoe, in which the hood is separately covered with an engine bonnet and a tank bonnet, respectively.

[0002]

2. Description of the Related Art Conventionally, in fixing a tank bonnet to a swivel base, brackets for mounting the bonnet are provided upright at predetermined intervals on the upper surface of the lateral outer end of the swivel base, and the bracket is covered. The tank bonnet was fixedly connected to the outside of the bonnet via lateral bolts.

[0003]

According to the conventional tank bonnet fixing structure, since the fixing bolts of the tank bonnet are exposed on the outer surface of the tank bonnet, mud adheres to the bolts. The bolts rust, making it difficult to remove the tank bonnet.
Furthermore, since the bolt is exposed on the outer surface of the bonnet, the bolt head has become unsightly in recent years in a work vehicle requiring design.

Therefore, as means for solving the above-mentioned drawbacks,
It is conceivable to provide an openable / closable inspection cover on the upper part of the tank bonnet and fix the tank bonnet from the inside through the inspection opening. However, in such a case, the following inconvenience occurs. That is, in recent years, since the fuel tank has been increased in size while reducing the size of the body, the outer surface of the tanks is provided close to the outer surface of the tank bonnet. There is almost no gap between the inner surface of the engine bonnet and it is almost impossible to insert the hand into that part and fix the bolt. There is a disadvantage that the fuel tank must be downsized.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a tank bonnet fixing bolt provided inside the tank bonnet, so that the tank bonnet can be easily fixed.

[0006]

In order to achieve the above object, the present invention is characterized in that an engine is arranged at a rear portion of a swivel, and tanks are arranged at one side of a front portion of the swivel. A lateral portion of the engine hood covering the engine communicates with a rear portion of the tank hood covering the tanks, and an inspection cover is provided on the upper portion of the engine hood, which can be opened and closed. Including an inspection cover, the upper and lower ends of the tank bonnet are bolted from the inside of the bonnet to the upper surface of the lateral outer end of the swivel, and the tank bonnet lower end and A positioning engagement portion is provided for engaging and connecting the swivel table with the swivel table from above and below via a pin and a connection hole.

[0007]

As shown in FIGS. 1 to 5, when the tank bonnet 15 is fixed to the swivel base 3, the intermediate portion of the tank bonnet 15 is connected to the positioning connecting pins 19 on the swivel base 3 side and the tank bonnet 15 side. Positioning is performed by engaging and connecting from above and below via a connecting hole 19a, and then the front or rear portion of the tank bonnet 15 is fixedly connected to the inside of the bonnet 15 via bolts 18. In such a case,
When fixing the front of the tank hood 15 to the swivel 3, open the inspection cover 15 a of the tank hood 15 upward, insert a hand through the upper inspection opening, and move the front of the tank hood 15 to the swivel 3. Up and down bolt 1
8 and fixedly connected. And tank bonnet 1
5 is fixed to the swivel 3, there is a distance from the inspection opening of the tank bonnet 15 to the fixing portion. In such a case, the inspection cover 14 a of the rear engine bonnet 14 is opened and the engine bonnet 15 is opened. The hand is inserted through the inspection opening at the top of the upper part 14 and the rear part of the tank bonnet 15 is fixedly connected to the swivel 3 via the bolt 18 in the vertical direction.

[0008]

As described above, since the inspection cover is provided on the upper part of the bonnet to fix the tank bonnet from the inside, it is possible to prevent the mud from adhering to the bolt,
The rust of the bolt can be prevented, and the work of attaching and detaching the tank bonnet can be easily performed. And, since the portion of the tank outer surface and the bonnet inner surface, which are difficult to reach, are fixed via the dowel pins for positioning, they can be fixed without enlarging the swivel or miniaturizing the fuel tank, The work of fixing the tank bonnet becomes easy.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 7 shows the entire side surface of the backhoe. A dozer device 2 is provided at the front of a traveling device 1 of a rubber crawler type, and a swivel 3 and a backhoe device 4 are provided above the traveling device 1.

Next, the arrangement of each part of the swivel 3 will be described. As shown in FIG. 6, the boom 4a of the backhoe device 4 is provided substantially at the center of the front, rear, left and right of the swivel base 3 via a pair of left and right brackets 3a, 3a integrally connected from the swivel frame.
The driving part 5 is formed at the front part on the left side of the boom 4a, and the engine 6 and the radiator 7 are arranged at the rear part of the swivel 3 so that the hydraulic pump 8, driven by the engine 6, An air cleaner 9 and a muffler 10 for the engine 6 are disposed on the rear left side. A battery 11, a fuel tank 12, and a hydraulic oil tank 13 are arranged on the swivel 3 on the right side of the boom 4a.

Next, the bonnet on the swivel 3 will be described. As shown in FIGS. 1 and 4, the bonnet of the driving unit that covers the engine and the tanks is divided into an engine hood 14 that covers the upper part of the engine and a tank hood 15 that covers the upper part of the tanks. Is a fixed bonnet 14 fixed to the swivel 3
b, and an inspection cover 14a that can swing open and close around the horizontal axis P1 above the fixed bonnet 14b, and the tank bonnet 15 has a longitudinal axis P
2 is provided with an inspection cover 15a that can swing open and close.

Next, the mounting structure of the engine bonnet 14 will be described. As shown in FIG.
A gate-shaped support frame 16 is erected and connected to the rear part of the right and left sides. Hinges 14c and 14c of an inspection cover 14a are bolted to a pair of left and right brackets 16a and 16a on the upper part of the support frame 16. The lower end of the fixed bonnet 14b is connected to the brackets 3b of the revolving frame via vertical bolts. The inspection cover 14a is configured to be openable and closable by a lock mechanism (not shown) including a locking member provided on the inspection cover 14a side and a locked member provided on the bonnet 14 side.

Next, the mounting structure of the tank bonnet 15 will be described. As shown in FIG. 4, a tank bonnet 15 having an inspection cover 15a and a wide support plate 17 for connection to the right bracket 3a of the pair of left and right brackets 3a supporting the base of the boom 4a.
As shown in FIG. 3, the connection hole 19b on the tank bonnet 15 side is fitted and connected to the knock pin 19a on the upper surface of the revolving frame 3 from above the revolving base 3 and is positioned and connected. As described above, two front and rear portions of the lower end of the tank bonnet 15 are connected to the brackets 3c, 3c on the upper surface of the revolving frame.
To each other via bolts 18 in the vertical direction. As shown in FIG. 5, the wide support plate 17 has a lower portion bolted to the right bracket 3a, an upper front side bolted to the upper surface of the fuel tank 12 via a support stay 20a, and an upper portion. Is bolted from the swivel 3 to a standing frame 21 via a support stay 20b. In addition, the tank bonnet 15
As shown in FIG. 1, the upper part of the rear side is connected to the brackets 16b, 16b of the support frame 16 by bolts from the bonnet 15 side via a support stay 15c provided continuously. The inspection cover 15a is bolted to the wide support plate 17 integrally with the inner wall of the tank bonnet 15 via a pair of front and rear hinges 15b. The inspection cover 15a is configured to be openable and closable by a lock mechanism (not shown) including a locking member provided on the inspection cover 15a side and a locked member provided on the bonnet 15 side.

The rear part of the tank hood 15 and the front part of the engine bonnet 14 are communicated inside the swivel 3, that is, the rear part of the tank hood 15 is open and the front part of the engine bonnet 14 is open. The part is open.

As shown in FIG. 7, the fixed hood 14b of the engine hood 14 has a large number of ventilation holes 14a.
d, and as shown in FIG. 5, a large number of ventilation holes 15d are also provided on the rear side surface of the tank bonnet 15.
Is provided.

As shown in FIGS. 2 and 3, a seal rubber 22 having an anti-vibration function is attached to the lower end edges of the bonnets 14 and 15, respectively.

With the above structure, as shown in FIG. 5, when the inspection cover 15a of the tank bonnet 15 is opened, the fuel tank 12 and the hydraulic oil tank 13 are exposed from the opening of the inspection cover 15a. Of course, the front portion of the tank bonnet 15 can be fixed from the inside through the opening with the inspection cover 15a opened. When the inspection cover 14a of the engine bonnet 14 is opened, the engine 6, the air cleaner 9 and the muffler 10 are exposed from the opening of the inspection cover 14a, so that the engine can be inspected. The rear part of the tank bonnet 15 can be fixed from the inside through the opened opening.

As shown in FIGS. 6 and 7, between the backhoe device 4 and the operation unit 5, a sunshade plate 23 made of translucent synthetic resin is provided.

[Alternative Embodiment] In the above-described embodiment, the knocking pin is provided on the revolving base and the connecting hole is provided on the bonnet side as the positioning engagement part. It may be provided on the side.

In the claims, reference numerals are provided for convenience of comparison with the drawings, but the present invention is not limited to the configuration shown in the attached drawings.

[Brief description of the drawings]

FIG. 1 is a plan view of a swivel table.

FIG. 2 is a longitudinal sectional view showing a fixed state of the tank bonnet.

FIG. 3 is a longitudinal sectional view showing a positioning engagement portion of the tank bonnet.

FIG. 4 is an exploded side view of the tank bonnet.

FIG. 5 is a side view of the tank bonnet.

FIG. 6 is a plan view of a swivel table.

FIG. 7 is an overall side view of the backhoe.

[Explanation of symbols]

 3 Turntable 6 Engine 12 Tank 13 Tank 14 Engine Bonnet 14a Inspection Cover 15 Tank Bonnet 15a Inspection Cover 18 Bolt 19a Pin 19b Connection Hole 19 Positioning Engagement

Claims (1)

(57) [Claims] An engine (6) is provided at a rear part of a swivel (3), and tanks (12) and (13) are provided at one side of a front part of the swivel (3). One side of the engine hood (14) covering the (6) communicates with the rear part of the tank hood (15) covering the tanks (12) and (13). In addition to the inspection cover (14a) that can be opened and closed, an inspection cover (15a) that can be opened and closed is provided above the tank bonnet (15). ) Two bolts (18) and (18) are connected from the inside of the bonnet at the front and rear ends of the lower end, and the lower end of the tank bonnet (15) and the swivel (3) are connected to an intermediate part of the front and rear bolt connection points. Bonnet structure backhoe, characterized in that is provided down (19a) and the connecting hole (19b) positioning engaging portion for engagement connection in the vertical direction through the (19).