JPH052756Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] This invention has an operating shaft for releasing the lock penetrating the free end side of a bonnet that can be opened and closed by swinging, and is fixed to the outwardly projecting end of the bonnet. The present invention relates to a bonnet opening/closing structure for a work vehicle configured to be unlocked by rotating an operating knob.

[Prior art]

As a bonnet opening/closing structure having the above configuration, for example, as shown in Japanese Utility Model Application Publication No. 57-77559,
A locking tool is fixed to the lower end of an operating shaft connected to a knob on the bonnet, and this locking tool is configured to be able to be released from a locking part fixed to the body side, and the locking tool and the locking part are engaged with each other. In order to match the phase, it has been proposed to have an arm protruding from the operating shaft and a spring attached between the tip of the arm and the body.

[Problem that the invention attempts to solve]

However, as mentioned above, in the conventional configuration, it is necessary to provide a special arm protruding laterally on the operation shaft in order to align the phases of the locking tool and the locking part, and it is also necessary to set the arm protruding in the direction in which the arm protrudes. It is necessary to accurately correspond to the mounting phase of the locking tool, which requires a lot of processing time.

The present invention has been made in view of the above-mentioned circumstances, and an object of the present invention is to provide a bonnet opening/closing structure for a working vehicle that can simplify the structure of the locking mechanism.

[Means for solving problems]

The characteristic configuration of the bonnet opening/closing structure for a work vehicle according to the present invention is that a locking device that can be freely engaged and detached from a locking portion fixed on the body side is provided in the bonnet, and a locking device is provided in the bonnet so as to be able to swing freely. The bent part is bent laterally, the bent part is engaged with the locking tool, and the locking tool is configured to be oscillated by rotation of the operating shaft, and the tip of the bent part and the bonnet are connected to each other. A spring is tensioned between the shaft and a predetermined part to bias the operating shaft to a predetermined locking phase.
Its action and effects are as follows.

[Effect]

That is, the bending part provided on the operating shaft is engaged with the locking tool, and the locking tool is configured to be swung by the rotation of the operating shaft, and the tip of the bending part and a predetermined part of the bonnet are connected. In between, a spring is installed to bias the operating shaft to rotate to a predetermined phase for locking, so the bent part of the operating shaft can be fitted with a spring to align the locking tool with the locking part on the fuselage side. It can also be used as an arm.

[Effect of idea]

As a result, by using the bent part provided on the operating shaft as the spring mounting arm, there is no need for a special spring mounting arm protruding from the operating shaft as in the past, reducing the number of parts. It has become possible to provide a work vehicle that has a simplified structure and is advantageous in terms of productivity and cost.

〔Example〕

Embodiments of the present invention will be described below based on the drawings.

As shown in FIG. 4, an engine E and a clutch housing 6 directly connected to the rear part of the engine E are mounted on the front parts of a pair of left and right main frames 1, 1 facing the front and back of the aircraft, and the rear part of the main frame 1 A transmission case 8 is connected to the transmission case 8 to form a machine body, and this machine body is composed of a rear wheel 10 pivotally supported on the rear part of the transmission case 8 and a front wheel 11 pivotally supported on the front part of the main frame 1. An agricultural tractor shown as an example of a working vehicle includes a lift arm 13 at the rear end of the body for lifting and lowering a working machine such as a tiller.

The main frames 1, 1 formed in the shape of a rectangular cylinder
are arranged in pairs on the left and right sides of the aircraft body, and on the main frames 1, 1, as shown in FIG. A battery 2 is disposed at the front position.

A bottom cover 24 whose center portion is curved downward is installed between the front ends of the main frames 1, 1, and the battery 2 is mounted and fixed on the upper surface of the bottom cover 24. Further, between the battery 2 and the front axle case 4, a weight mounting case 5 is provided on the lower surface of the main frame 1.
is fixed, so that a weight 16 can be placed inside this weight mounting case 5. That is, by providing the weight 16 at the tip of the machine body at the forward position of the front axle case 4, the weight balance in the longitudinal direction of the machine body is made good, and a heavy working device is connected to the rear of the agricultural tractor for towing work. Sufficient traction force can be exerted even when doing Moreover, although the weight 16 is provided at the front of the fuselage, it does not protrude forward from the tip of the fuselage, and the dimension from the front axle case 4 to the tip of the fuselage does not become large. There is no need for a very large headland. Further, the weight 16 is housed in the weight attachment case 5 so that the appearance is not spoiled, and when the weight 16 is not housed in the weight attachment case 5, it can be used as a storage space.

Next, the unlocking/closing structure of the bonnet 15 will be explained in detail.

The bonnet 15 is provided so that its front side can be opened and closed upwards with the rear side serving as a fulcrum.
An operating knob 26 that can lock and release the closed state of the bonnet 15 is protruded from the center of the front part of the bonnet 15 in the left-right direction. A locking fitting 3 is attached to the lower part of the knob 26, and by rotating the knob 26, a locking fitting 19 attached to the lower end of the locking fitting 3 is attached to a locking part fixed to the front part of the body. 20 so that it can be locked or released.

That is, the lock fitting 3 is connected to the operation shaft 21 attached to the lower part of the knob 26 and the bonnet 1.
5, a support plate 23 is fixed to a stay 22 horizontally suspended on the lower surface of the 5, and a locking member 19 is swingably pivoted to the support plate 23.
The lower end of the operating shaft 21 is inserted into the support hole 23b of the support piece 23a bent toward the rear of the aircraft at the upper part of the body, and a bent portion formed by bending the lower end of the operating shaft 21 sideways. 21a is inserted into a horizontally elongated hole 23c drilled in the support plate 23, and a bent portion 21 is provided at the upper end of the locking tool 19.
a is inserted, and by rotating the knob 26, the bent portion 21a is swung left and right, and the locking tool 19 is swung in the left-right direction of the aircraft body. Lock recess 19a
is adapted to be locked to the arch-shaped locking portion 20 fixed to the upper surface of the stay 17 installed at the front of the fuselage. Further, a spring 31 is tensioned between the tip of the bent portion 21a and the body to bias the locking member 19 in the locking direction.

Therefore, when closing the bonnet 15, by pushing the tip of the bonnet 15 downward and rotating it, the locking part 20 comes into contact with the inclined surface 19a formed on the lower edge of the locking tool 19, and the locking tool is closed. 1
9 swings slightly, and the locking member 19 is rotated in the locking direction by the biasing force of the spring 31, so that the locking portion 20 is locked in the locking recess 19a. Also, when opening the bonnet 15, use the knob 2.
6 by hand and rotate it, the locking tool 19 swings through the operating shaft 21, the locking part 20 comes off from the lock recess 19a of the locking tool 19, and the lock is released. Become.

Note that the stay 17 installed at the front of the aircraft
There is a bonnet receiver 33 made of elastic rubber on the top surface of the
is provided in a protruding manner, and comes into elastic contact with the stay 22 of the bonnet 15 when the bonnet 15 is closed.

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 opening/closing structure for a working vehicle according to the present invention, in which FIG. 1 is a longitudinal sectional side view of the main part, FIG. 2 is a longitudinal sectional front view of the main part, FIG. FIG. 1 is an overall side view of an agricultural tractor. 15... Bonnet, 19... Locking tool, 20
...Locking portion, 21...Operation shaft, 21a...Bending portion, 26...Operation knob, 31...Spring.

Claims (1)

[Scope of utility model registration request] An operating shaft 21 for unlocking is provided through the free end side of the bonnet 15, which can be opened and closed by swinging.
A bonnet opening/closing structure for a working vehicle configured to release the lock by rotating an operating knob 26 fixed to an outwardly projecting end of a bonnet 15,
A locking tool 19 that can be engaged and detached from a locking part 20 fixedly installed on the body side is swingably provided in the bonnet 15, and the inner end of the bonnet 15 of the operating shaft 21 is bent laterally, and this bending The portion 21a is engaged with the locking tool 19, and the locking tool 19 is configured to be swing-operated by rotation of the operating shaft 21, and
A bonnet opening/closing method for a working vehicle characterized in that a spring 31 is tensioned between the tip of the bent portion 21a and a predetermined portion of the bonnet 15 for biasing the operating shaft 21 to rotate to a predetermined locking phase. structure.