JPH0526131Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] This invention places the engine and driver's seat at a location behind the rotary joint for connecting the oil passage of the swivel base attached to the traveling machine base. With,
The present invention relates to a backhoe in which a traveling control valve and a backhoe control valve are attached to a control box erected at a location located in front of the rotary joint of the swivel base.

[Conventional technology]

In the above-mentioned backhoe, conventionally, as shown in FIG _.
was placed between the rotary joint 9 and the engine 8, which caused the following inconveniences.

[Problem that the invention attempts to solve]

That is, when attempting to shorten the length from the center of rotation P to the rear end of the swivel base 4, the arrangement level of the driver's seat 15 becomes higher. This is because if you try to shorten the length from the rotation center P of the swivel base 4 to the rear end, the distance between the engine 8 and the rotary joint 9 will shorten accordingly. Attached hydraulic pumps P ₁ , P ₂
In order to avoid interference between the turning motor _M3 and other equipment, it is necessary to place the turning motor _M3 far away from the left and right center of the turning table 4 on one side. ₃ is now located under the driver's feet, and the height of the swing motor _M3 and rotary joint 9 that protrudes upward from the bottom end of the swing table is relatively high. As shown, of the driving section deck 16, which is provided to also serve as a cover over the swing motor _M3 and the rotary joint 9, the driving step part where the driver's feet are placed is located at a high level. Because it will be.

The purpose of the present invention is to modify the swivel base so that it can both shorten the longitudinal length and lower the level of arrangement of the driver's seat.

[Means for solving problems]

The characteristic configuration of the present invention is that, in the above-mentioned backhoe, a motor for rotating the swivel base is disposed below the traveling control valve and the backhoe control valve, and the motor is located below the rotary joint of the drive deck. The driving part deck is bent so that the driving step parts located on both sides of the rotary joint are located at a lower level than the cover part located above the rotary joint. The effects are as follows.

[Effect]

By arranging the motor for turning below the control valve, the engine can be placed as close to the rotary joint as possible, and the length from the center of rotation of the turning base to the rear end can be made as short as possible. In order to secure space, it is not necessary to make the length from the rotation center of the swivel base to the front end longer than before, and furthermore, the cover part is located between the legs placed on the driving step part. In this way, the motor can be mounted on the swivel base while narrowing the width of the cover portion and lowering the arrangement level of the left and right driving step portions as much as possible.

[Effect of idea]

The length from the rotation center of the swivel base to the rear end can be shortened, and there is no need to increase the length from the rotation center of the swivel base to the front end, so the front and rear length of the swivel base can be made as short as possible. In this way, it became possible to make the front and rear length of the aircraft as short as possible. Furthermore, since the layout level of the driving step part can be made as low as possible, the layout level of the driver's seat can be made as low as possible and the height of the aircraft can be made as low as possible. It is also compact, allowing for convenient work and storage even in relatively narrow spaces.

〔Example〕

Next, examples will be shown.

As shown in FIG. 5, a slewing base 4 is attached to a traveling machine base 3 equipped with a crawler type traveling device 1 and a dozer 2, and a driving part having an engine bonnet 5, a driving part having a sunshade 6, etc. , a backhoe device 7 is provided on the swivel base 4 to constitute a backhoe with a dozer.

As shown in FIGS. 1 and 3, the engine 8 is located behind the rotary joint 9 of the swivel base 4 as shown in FIG. 10. A rotary fan 11 that supplies cooling air to the engine cooling radiator 10 is arranged behind the engine 8,
An exhaust muffler 12 and a fuel tank 13 for the engine 8 are arranged on both sides of the rear part of the engine 8, and hydraulic pumps _P1 and _P2 are attached to the front part of the engine 8 and are driven by the engine 8. It is configured to take out hydraulic oil from the oil tank 14 and supply it to each hydraulic actuator to be described later.

To configure the driving section, the driver's seat 15 is placed behind the rotary joint 9 and attached to the engine bonnet 5, and the driving section deck 16 is placed in front of the engine bonnet 5.
The traveling machine base 3 drives the crawler traveling device 1.
The dozer 2 is operated by vertically swinging the dozer arm 17 and a pair of travel control valves V ₁ and V ₂ connected to a pair of travel hydraulic motors M ₁ and M ₂ attached via the rotary joint 9. Dozer control valve connected to hydraulic cylinder C ₁ for lifting and lowering operations via rotary joint 9
V ₃ , hydraulic cylinder for boom of backhoe device 7
C ₂ , the four backhoe control valves V ₄ to V ₇ which are connected separately to the arm hydraulic cylinder C ₃ , the bucket hydraulic cylinder C ₄ and the swing hydraulic cylinder C ₅ , and the rotation of these to the swivel base 4 . Each of the swing control valves V ₈ connected to the hydraulic motor M ₃ mounted for dynamic operation is mounted on a control box 18 erected at a location in front of the rotary joint 9 of the swivel base 4. There is.

The swing hydraulic motor _M3 is connected to the eight control valves as shown in FIGS. 1 to 4.
It is attached to the swivel base 4 via the bearing holder 19 while being disposed below V ₁ to V ₈ , and rotates the swivel base 4 by driving the swivel pinion gear 21 meshed with the swivel guide gear 20 . It is configured to do so.

As shown in FIGS. 2 and 3, the driving section deck 16 has driving step portions 16a, 16a located on both sides of the rotary joint 9 on which the driver's feet are placed. The cover portion 16b is bent and attached to the swivel base 4 so as to be located at a lower level than the cover portion 16b located above the cover portion 9.

In the oil tank 14, as shown in FIG.
A front tank portion whose vertical height is lowered so as to fit below the driving part deck 16, and a rear tank portion which is formed to have a higher vertical height than this front tank portion and fit inside the engine bonnet 5. It is equipped with. The fuel filler port 22 and blazer 23 of the oil tank 14 are provided in the rear tank portion so that oil is less likely to leak out regardless of the inclination of the aircraft.

Note that although reference numerals are written in the claims section of the utility model registration for convenience of comparison with the drawings, the present invention is not limited to the structure of the attached drawings by such entry.

[Brief explanation of drawings]

The drawings show an embodiment of the backhoe according to the present invention, in which Fig. 1 is a plan view of the driving part, Fig. 2 is a front view of the control valve installation part, Fig. 3 is a side view of the operating part, and Fig. 4 is a plan view of the driving part. A sectional view of the rotary joint, and FIG. 5 is a side view of the entire backhoe with a dozer. FIG. 6 is a plan view showing a conventional swing motor arrangement, and FIG. 7 is a front view of a conventional operating section. 3...Traveling machine base, 4...Swivel base, 8...Engine, 9...Rotary joint, 15...Driver's seat, 16...Driving section deck, 16a...Driving step part, 16b...Cover parts, V ₁ , V ₂
...Travel control valve, V ₄ , V ₅ , V ₆ ,
V ₇ ... Control valve for backhoe, M ₃ ...
...Motor, 18...Control box.

Claims (1)

[Scope of utility model registration request] The engine 8 and the driver's seat 15 are disposed at a location located behind the rotary joint 9 for oil passage connection of the swivel base 4 attached to the traveling machine base 3, and Travel control valves V ₁ and V ₂ are installed in the control box 18 installed in the front position.
and control valves for backhoes V ₄ , V ₅ ,
It is a backhoe equipped with V ₆ , V ₇ , and the motor M ₃ for rotating the swivel base 4 is connected to the travel control valves V ₁ , V ₂ and the backhoe control valves V ₄ , V ₅ , A driving step portion 16a located below V ₆ and V ₇ and located on both sides of the rotary joint 9 of the driving portion deck 16 is a cover portion 16b located above the rotary joint 9. A backhoe in which the driving section deck 16 is bent so as to be located at a lower level.