JPH0140922Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention provides an engine bonnet that is capable of swinging up and down, has an engaging piece for a bonnet lock installed inside the engine bonnet, and a machine base on which the bonnet is mounted in a swingable manner. A catch for the engaging piece is provided in the part, and the engine bonnet is configured to be freely switched between a state in which the engine bonnet is fixed to the machine base and a state in which it is released from the fixing state by engaging and disengaging the catch from the engaging piece. Regarding the engine bonnet fixing structure of a working vehicle, the purpose is to make it possible to lock the engine bonnet with a simple closing operation through simple structural improvements, and to make it easier to open the engine bonnet once it is locked. The point is to make it possible to do this.

The characteristic configuration of the present invention is that, in the engine bonnet fixing structure of the working vehicle, the catch is swingable in a direction intersecting the movement trajectory of the engagement piece at a position facing the movement trajectory of the engagement piece. It is provided with elastic bias on the side that engages with the joint piece, and
The catch includes a hook-shaped locking portion that engages with the upper end of the engagement piece to prevent the engine bonnet from moving toward the open side, and a hook-shaped locking portion that prevents the engine bonnet from moving from the open state to the closed direction. a cam surface which, upon contact with the engagement piece, generates a component force in a direction that resists the elastic biasing force of the catch and retracts the engagement portion out of the movement trajectory; Further, on the engine bonnet side, an operating tool for lifting the bonnet upward is provided in a swingable manner, and this operating tool includes a swinging tool for lifting the engine bonnet upward. The present invention is characterized in that an operating portion is formed that presses the catch toward the release side from the engagement piece when the catch is moved.

The functions and effects of the characteristic configuration of the present invention are as follows.

In other words, when the engine bonnet is lowered to close the engine, the engagement piece comes into contact with the cam surface of the catch that is elastically biased toward the engagement side, causing the locking portion of the catch to move along the movement trajectory of the engagement piece. Temporarily evacuate outside,
As the engaging piece descends as the engine bonnet further descends, the retracted state of the locking portion of the catch is released, and the catch and the engaging piece engage with each other due to the elastic bias against the catch. Since the engine bonnet can be closed and locked to the aircraft by simply lowering the engine bonnet, there is no need for any special closing operation to lock it.
The complexity of special locking operations can be eliminated, and the configuration has become simpler. Also, as the operating tool is moved in the direction of lifting the engine bonnet,
Since the operating part formed on the operating tool is for pushing the catch toward the side where it is released from the engagement piece,
The operation to release the locked state and the operation to swing open the bonnet can be performed in a series of operations.
Compared to the conventional method, in which operating the operating tool and opening the bonnet are performed separately, the operability has been improved. Since only extremely simple structural improvements are made, it is possible to provide a practically advantageous engine bonnet fixing structure without complicating the structure.

The following embodiments of the present invention will be described in detail based on the drawings.

As shown in FIG. 1, a swivel table 3 is installed on a crawler type traveling device 2 equipped with a dozer device 1 so as to be able to drive and rotate freely around the vertical axis. At the front, a backhoe device 4 capable of digging side ditches, a boarding and driving section 5, and a driving section 6 are arranged side by side in that order, thereby forming a worker who can selectively perform excavation work and soil removal work.

In the driving unit 6, as shown in FIG.
A bonnet 8 covering the engine 7 is mounted on the swivel base 3 so as to span almost the entire width of the swivel base 3 and can be opened and closed by swinging up and down by means of a hinge 9 placed on one side of the bonnet 8. , the bonnet 8 is fixed in the closed state by a fixing mechanism 10 provided on the other side thereof.

As shown in FIGS. 3 and 4, the fixing mechanism 10 is constructed by attaching a pair of rectangular engaging pieces 11 to the lower part of the side surface of the bonnet 8 inside the swinging end of the bonnet 8. A plate-shaped catch 1 is attached with one side fixedly attached to the inner surface of the bonnet 8 while facing the front and rear of the aircraft, and has a hook-shaped locking portion 12a formed in an approximately inverted V shape at the upper end.
2 is attached to the bracket 13 provided on the top surface of the swivel base 3.
Then, the locking portion 12a swings between a posture in which it engages with the upper side portion of the engagement piece 11 on the side of the bonnet 8 in the closed state and a posture in which it separates from the engagement piece 11 toward the inside of the bonnet 8. The catch 12 is freely pivotally connected at its lower end side, and a helical spring 14 attached to the pivotally connected portion always urges the catch 12 toward the engagement position with respect to the engaging piece 11. Stopper portion 12b integrally extended from the lower end
Due to the contact between the end and the top surface of the swivel base 3, the catch 1
2 to the side of the bonnet 8, the catch 1
The inverted V-shaped end piece portion of the locking action portion 12a in
The end portion of the locking portion 12a is regulated so as to be located on the swing locus of the lower end corner of the engaging piece 11 as the bonnet 8 is opened and closed. The helical spring 14 is moved while the catch 12 is temporarily retracted from the movement locus of the engagement piece 11 due to the contact between the cam surface 12c and the lower end of the engagement piece 11.
The catch 12 is automatically moved to the engaging piece 1 by the urging force of
1 to fix the closed state of the bonnet 8.

In order to release the fixing mechanism 10, a lever-like operating tool 15 is provided at the bottom of the engagement piece 11, with its operating end protruding outward from a vertical elongated hole 16 formed in the side surface of the bonnet 8. The operating part 15a, which is integrally connected to the operating tool 15, is brought into contact with the engaged catch 12 by the upward swinging operation, and the helical spring 1
4, so that the catch 12 is disengaged from the engagement piece 11 toward the unlocking side, and when the catch 12 is disengaged, the operating tool 15 comes into contact with the upper end of the elongated hole 16, and is fixed. It is configured such that the release operation of the mechanism 10 and the opening operation of the bonnet 8 can be performed as a series of operations by lifting and swinging the operating tool 15.

Note that the fixing mechanism 10 includes a catch 12.
The shape and mounting structure of the engaging piece 11 can be changed in various configurations, and the shape of the operating tool 15 for releasing the fixing mechanism 10 by an upward swinging operation,
And the structure can be changed in various ways.

The engine bonnet fixing structure for a working vehicle according to the present invention can be applied to various types of working vehicles such as construction working vehicles such as backhoe working vehicles and crane working vehicles, and agricultural working vehicles.

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 illustrate an embodiment of the engine bonnet fixing structure for a working vehicle according to the present invention, in which FIG. 1 is an overall side view of the working vehicle, FIG. 2 is a sectional view taken along the line -- in FIG.
FIG. 3 is a diagram for explaining the operation of the main parts, and FIG. 4 is a partial cross-sectional view of the main parts when viewed from above. 8...Bonnet, 11...Engagement piece, 12...
Catch, 12a...locking action part, 12c...cam surface, 15...operation tool, 15a...operation part.

Claims (1)

[Scope of utility model registration request] A bonnet lock engagement piece 11 is attached to the lift-open type engine bonnet 8, which can swing up and down, and the engagement piece 11 is attached to the machine base portion on which the bonnet 8 is swingably mounted. A work in which a catch 12 is provided for the engine bonnet 8, and the engine bonnet 8 can be freely switched between a state in which it is fixed to the machine base and a state in which it is released by engaging and disengaging the catch 12 and the engaging piece 11. In the car engine bonnet fixing structure,
The catch 12 is provided at a position facing the locus of movement of the engaging piece 11 so as to be swingable in a direction intersecting the locus of movement, and elastically biased toward a side that engages with the engaging piece 11. At the same time, the cat 1
2 includes a hook-shaped locking portion 12a that engages with the upper end side of the engaging piece 11 to prevent the engine bonnet 8 from moving toward the open side; Based on the acting force that moves in the direction, the locking portion 12a is moved in the direction of retracting the locking portion 12a out of the movement trajectory against the elastic biasing force of the catch 12 due to the contact with the engaging piece 11. A cam surface 12c that generates a force is formed.Furthermore, an operating tool 15 for lifting the bonnet 8 upward is connected to the engine bonnet 8 in a swingable manner. The present invention is characterized in that an operating portion 15a is formed to push the catch 12 toward the release side from the engagement piece 11 as the engine bonnet is swung in the direction of lifting the engine bonnet. Engine bonnet fixing structure for work vehicles.