JPH0526133Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention includes a swivel base mounted on a traveling machine base, an engine placed behind the rotary joint of the swivel base, and a swivel base mounted on the top surface of a bonnet covering the engine. A driving deck is provided with a driver's seat, and includes a cover part that covers an upper part of the rotary joint, and step parts located on both left and right sides of the rotary joint, and the driving deck is formed such that the step part is lower than the cover part. Regarding the backbone.

[Conventional technology]

In the conventional backhoe, the front bonnet part of the bonnet is fixed to the swivel base, and the front upper part of the bonnet is attached to the front bonnet part so that the rear bonnet part can swing up and down, thereby preventing the rear bonnet part from rising. It has been considered to provide a catch member on the rear bonnet portion for fixing the rear lower portion to the swivel base.

[Problem that the invention attempts to solve]

However, in order to prevent the rear bonnet portion from swaying laterally due to vibrations of the aircraft body, the strength of the catch member must be increased, resulting in an increase in cost.

An object of the present invention is to prevent the bonnet from swinging sideways with a simple structure.

[Means for solving problems]

The characteristic configuration of the bonnet structure of the backhoe of the present invention is that the rear bonnet part of the bonnet is fixed to the swivel base, and the upper part of the rear side is fixed to the rear side so that the front bonnet part to which the driver's seat is attached can swing up and down. A notch is provided at the front lower part of the front bonnet, into which the rear end of the cover fits when the front bonnet swings downward, and the notch is in contact with both left and right lateral sides of the cover. The lateral vibration regulating portion is formed on the periphery of the notch, and its effects are as follows.

[Effect]

In other words, the front bonnet part, which can swing up and down,
When the notch part fits into the end of the cover part as it swings downward, the lateral vibration control part around the notch part comes into contact with both left and right lateral sides of the cover part, ensuring that the front bonnet part does not sway horizontally. Furthermore, if the operator is seated in the seat, his weight will prevent the front bonnet from swinging upward.

[Effect of the invention]

Therefore, with a simple structure of just providing a notch in the front bonnet part, it is possible to prevent the bonnet from lateral vibration and upward swinging without providing a catch member, and even if a catch member is provided, the catch member itself can be prevented. The structure is simple and the bonnet can be formed at low cost.

Furthermore, since the rear bonnet section is fixed to the swivel base, it is easy to ensure the strength of the rear bonnet section, making it easier to improve the protection performance for the engine.

〔Example〕

Next, embodiments of the present invention will be described based on the drawings.

As shown in Figure 2, a crawler type traveling machine base 1
A swivel base 3 driven by a hydraulic motor 2 and a dozer 5 driven by a hydraulic cylinder 4 are attached to the swivel base 3, a backhoe device 6 is provided on the swivel base 3, and an engine E is installed behind the rotary joint 7 of the swivel base 3. A driver's seat 9 is provided on the upper surface of a bonnet 8 that covers the engine E, and in front of the driver's seat 9, there are installed a driver's seat 9, a hydraulic motor 2, a hydraulic cylinder 4, and a hydraulic cylinder C installed in the backhoe device 6. A control box 10 containing an operating valve V is installed upright, and between the bonnet 8 and the control box 10, there is a cover part 11A that covers the upper part of the rotary joint 7, and a step part 11B located on both left and right sides of the rotary joint 7. A backhoe is constructed by bending a driving deck 11 consisting of a driving deck 11 such that the step portion 11B is lower than the cover portion 11A.

To form the backhoe device 6, the swivel table 3
An arm 13 is provided with a boom 12 that can freely swing up and down, and a bucket 14 is attached to the tip so that it can swing back and forth.
is attached to the boom 12 so as to be swingable back and forth, and the boom 12, arm 13, and bucket 14 are each provided with a hydraulic cylinder C for swinging operation.

Of the bonnet 8, as shown in FIG. 1, the rear bonnet part 8B is formed from a thick steel plate and is fixed to the swivel base 3, and the front bonnet part 8A, which is made of a thin steel plate and has the driver's seat 9 mounted thereon, is arranged vertically. The upper part of the rear side is attached to the horizontal support shaft 1 so as to swing.
5 to the rear bonnet part 8B, and as the front bonnet part 8A swings downward, the cover part 11
A notch portion 16 into which the rear end of A fits is provided at the lower front side of the front bonnet portion 8A, and a lateral vibration regulating portion 17 that contacts both left and right lateral sides F, F of the cover portion 11A is provided at the periphery of the notch portion 16. It has been formed.

[Another example]

Instead of integrally forming the cover portion 11A and the step portion 11B, they may be formed separately. The front bonnet portion 8A may or may not be provided with a catch member for preventing its rise.

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 the drawing]

The drawings show an embodiment of the bonnet structure of a backhoe according to the present invention, and FIG. 1 is a perspective view of the main part, and FIG. 2 is a side view of the entire backhoe. DESCRIPTION OF SYMBOLS 1... Traveling machine base, 3... Swivel base, 7... Rotary joint, 8... Bonnet, 8A... Front bonnet part, 8B... Rear bonnet part, 9...
...Driver seat, 11...Driving deck, 11A...Cover part, 11B...Step part, 16...Notch part, 17...Side vibration control part, E...Engine, F
...lateral side.

Claims (1)

[Scope of utility model registration request] A swivel base 3 is attached to the traveling machine base 1, and the swivel base 3
An engine E is arranged behind the rotary joint 7, a driver's seat 9 is provided on the upper surface of a bonnet 8 that covers the engine E, and a cover part 11A that covers the upper part of the rotary joint 7 and the left and right sides of the rotary joint 7 are provided. Step parts 1 located on both sides
In a backhoe in which a driving deck 11 consisting of 1B is formed such that the step part 11B is lower than the cover part 11A, the rear bonnet part 8B of the bonnet 8 is fixed to the swivel base 3. , the rear upper part of the front bonnet part 8A to which the driver's seat 9 is attached is attached to the rear bonnet part 8B so that it can swing up and down, and as the front bonnet part 8A swings downward, the rear end of the cover part 11A Notch 1 into which
6 is provided at the front lower part of the front bonnet part 8A, and a lateral vibration regulating part 17 is formed at the periphery of the notch part 16, which contacts both left and right lateral sides F, F of the cover part 11A. Bonnet structure.