JPH0326856Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention provides a tractor bonnet in which the lower side or the upper side of the side plate constituting the engine bonnet is pivotally connected to the machine body so that the bonnet can swing in and out. Regarding opening/closing structure.

[Conventional technology]

Generally, the side plates are formed to have a relatively large front-rear dimension, so the opening/closing structure shown in FIG. 6 is often adopted. That is, a rotatable lock arm 1 is attached to both the front and rear ends of the inner upper part of the side plate 9 which is pivotally connected to the fuselage frame 3 via the pivot parts D and D.
0 and 10 are installed, and this lock arm 1
0 and 10 are operated using the lock arm 10 on the outside of the side plate 9.
This is done using knobs 16, 16 provided coaxially with the. and,
Locking or unlocking of the side plate 9 is performed using receiving members 14, 14 provided on the fuselage side and the lock arm 1.
0 and 10 independently.

[Problem that the invention attempts to solve]

However, with the configuration shown in the prior art, the operation for locking or unlocking must be performed at two locations, which takes time and effort, and a through hole is drilled in the side plate to attach the knob for operating the lock arm. In addition, it requires a structure for installation and rotation, and is time-consuming and costly to manufacture, leaving room for improvement.

It is also possible to connect two lock arms with a rod or the like and omit one knob so that the lock can be unlocked by operating one lock arm, but although this makes the operation easier, the structure is more complicated. difficult to realize.

Also, considering the above-mentioned engagement structure between the lock arm and the receiving member, in a structure in which the lock arm swings in response to the operation of the knob, the lock arm and the receiving member slide each time the knob is operated. Since they are in contact with each other, each contact surface tends to wear out, and when used for a long period of time, a gap is created between the two, making it impossible to close the side plate when it is pulled to the specified position, causing vibration to the side plate. This may lead to inconveniences such as causing.

The purpose of the present invention was made in view of the above-mentioned circumstances, and was designed to provide a rational bonnet opening/closing structure that is easy to operate and maintains a secure closed state even after long-term use. The point is to compose it.

[Means for solving problems]

A feature of the present invention is that a rotary lock arm that can be freely engaged with and detached from a receiving member on the body side is installed near one of the front and rear ends of the inside of the side plate so as to be rotatable from the outside of the side plate, and one end is pivotally connected to this lock arm. A lock arm is extended along the inner surface of the side plate to the other end of the front and back, and is penetrated and supported by the support member, and as the lock arm is rotated toward the lock side, the lock arm is actuated to protrude toward the other end of the side plate, The opposite side plate of the receiving member, which is made of a permeable body formed on the side plate side, is configured to be engaged with the armpit, and its functions and effects are as follows.

[Effect]

In other words, the lock rod is linked to protrude toward the other end when the lock arm is operated toward the lock side, so even if the side plate is formed with a relatively large longitudinal dimension, the same timing as when the lock arm is operated. The lock rod engages and disengages from the receiving member.

In addition, since the lock rod engages and disengages from the receiving member by operating along the axis of the lock rod,
Compared to a structure in which another lock arm is provided on this side and rotated by pushing and pulling the rod, the operating resistance is low.

Furthermore, in the present invention, the receiving member is made of an elastic body, and the rod is engaged with the opposite side plate of the receiving member during the closing operation, so that the receiving member is elastically deformed during this engagement. Even if wear may occur on the respective sliding surfaces due to long-term use, the rod and receiving member can be maintained in contact during this engagement. Even if there is some error in the positional relationship, engagement and retention can be carried out without strain.

[Effect of idea]

Therefore, the bonnet is easy to operate because only a single lock arm is required for manual operation, and the bonnet can be reliably closed even after long-term use without causing any inconveniences such as vibration in the side plates. The open structure is simple and inexpensive.

〔Example〕

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

As shown in FIG. 5, an engine 4 is mounted on the front part of a fuselage frame 3 on which a front wheel for steering 1 and a rear wheel for propulsion 2 are mounted, and a steering handle 5, a seat 6, etc. are mounted in the center. An agricultural tractor is constructed by disposing a driving section A consisting of the following.

Further, an engine bonnet B formed to cover the upper and left and right side parts of the engine 4 is provided at the front of the vehicle body, and the front of this bonnet B includes two headlights 7, a front grill 8, etc. It is provided.

The engine bonnet B is constructed such that the left and right side plates of the bonnet B are swingable so that the interior of the engine room C can be inspected and repaired from the sides by opening the left and right sides.This will be described in detail below.

As shown in FIGS. 1 to 4 A and B, a side plate 9 whose lower end is connected to the left fuselage frame 3 via two pivot parts D and D, a lock arm 10 provided inside the rear end of the side plate, A lock rod 11 is pivotally connected to one end of the lock arm 10 and extends forward.
A support member 12 that penetrates and supports the front end of the body, a receiving member 14 that is provided on the fuselage side and that the lock arm 10 engages with, a receiving member 15 that the lock rod 11 engages with, a knob 16 that operates the lock arm 10, etc. 9 swing structures and lock mechanisms are constructed.

The operation for opening or locking the side plate 9 is as follows:
By rotating the knob 16, the lock arm 10
and the receiving member 14, the lock rod 11 and the receiving member 1
This is done by engaging and disengaging 5.

Further, as shown in FIG. 1, a rotating shaft 16a fixed to the knob 16 is disposed so as to penetrate through the side plate 9.
The lock arm 10 is fixed to the shaft end. A ring-shaped buffer member 17 for absorbing engine vibration is interposed between the knob 16 and the side plate 9, and a disc-shaped spring 18 is interposed between the side plate 9 and the lock arm 10. As shown in Figure 3,
The cross-sectional shape of the engaging side portion 10a of the lock arm 10 is formed into a circular arc shape smoothly protruding toward the outside of the aircraft body, and the receiving member 14 with which this engaging side portion 10a engages
is made of a plate-like elastic body with two protrusions 14a and 14b formed toward the inside of the machine body at the top and bottom when viewed from the front and rear directions, and is attached to the body side frame 3a with bolts 19. By setting the protrusion amount of the upper protrusion 14a large, the engagement side part 10a of the lock arm 10 is reliably locked between the two protrusions 14a and 14b, and
The lock arm 10 is configured to prevent excessive rotational operation.

As shown in FIG. 1, the rear end 11a of the lock rod 11 is bent into a hook shape and is supported through the non-engaging side 10b of the lock arm 10.
The front end 11b of this lock rod 11 is formed into a tapered shape.

The receiving member 15, to which the front end 11b of the lock rod 11 is engaged and disengaged, is made of a plate-like elastic body formed into a substantially L-shape in plan view.
is further formed into a shape that protrudes toward the inside of the fuselage, so that the front end portion 11b of the lock rod 11 can ride smoothly and also generate a strong elastic locking force.

Further, in order to adjust the position of the side plate 9 when the side plate 9 is locked, long holes 15b, 15b are formed in the receiving member 15, and the longitudinal direction is set in the inside and outside directions of the fuselage body. The receiving member 15 is attached to the frame 3a on the fuselage side through the bolts 20, 2.
0 is tightened and fixed.

Furthermore, a rubber cushion 21 is attached to the front frame 3a to receive the side plate 9 during locking.

Bent pieces 9a, 9b, and 9c are formed at the front end, rear end, and upper end of the side plate 9, respectively, toward the inside of the body, and the opening edge on the side of the bonnet B also has bent parts corresponding to the bent pieces, respectively. Ba, Bb, and Bc are formed, and a rubber sealing material 22 is inserted into these bent portions to prevent rainwater from entering into the bonnet B when the side plate 9 is locked, and also to prevent vibration of the side plate 9. It is configured to do this.

[Another example]

In this embodiment, the side plate 9 is pivoted at the lower edge, but it may be pivoted at the upper edge instead.

[Brief explanation of the drawing]

The drawings show an embodiment of the bonnet opening/closing structure for a tractor according to the present invention; FIG. 1 is a cross-sectional plan view showing the lock mechanism, FIG. 2 is a side view of the engine bonnet with the side plate open, and FIG. 4A and 4B are side views showing the operating state of the lock mechanism; FIG. 5 is an overall side view of the tractor;
The figure is a side view of an engine bonnet section showing a conventional example. 9... Side plate, 10... Lock arm, 11...
Lock rod, 12...Supporting member, 14...Receiving member, B...Engine bonnet.

Claims (1)

[Scope of utility model registration request] A tractor bonnet opening/closing structure in which the lower side or the upper side of the side plate 9 constituting the engine bonnet B is pivotally connected to the machine body so that it can swing in and out. A rotatable lock arm 10, which can be freely engaged and detached from a receiving member 14 on the fuselage side, is rotatably attached from the outer surface of the side plate, and a lock rod 11, one end of which is pivotally connected to the lock arm 10, is attached to the front and rear ends of the lock arm 11 along the inner surface of the side plate 9. An elastic body formed on the fuselage side extends sideways and is supported through the support member 12, and as the lock arm 10 rotates toward the lock side, the lock rod 11 is actuated to protrude toward the other end of the side plate. A tractor bonnet opening/closing structure configured so that the opposite side plate of the receiving member 15 is engaged with the other side.