JPS582700Y2 - Structure of safety frame for tractor - Google Patents

Description

[Detailed description of the invention] The present invention includes a front frame consisting of a pair of left and right support sections and a horizontal rod section connecting them at the top, in front of the control section.
Moreover, one support column is installed at the rear of the control section, and extends from both ends of the horizontal rod portion to the upper part of the support support.
This invention relates to the structure of a safety frame for a tractor that has a letter-shaped upper frame.

Generally, the control section of a tractor is exposed so that it is easy to monitor the connected working equipment, so in the event that the tractor falls over, the operator will be caught between it and the ground. For this reason, a safety frame like the one above is installed to surround the control section, so that even if the aircraft falls over, the safety frame can support the aircraft and allow the operator to be located at the bottom of the aircraft. It is necessary to configure it so that it has space.

The present invention aims to facilitate the molding process of the upper frame in the safety frame structure, and to greatly increase the strength of the connection portion between the upper frame and the rear column.

Embodiments of the present invention will be described in detail below with reference to illustrative drawings.

The traveling body 1 is provided with driving wheels 2, 2, steering wheels 3, 3, a control handle 4, and a lift lever 5 for raising and lowering a working device (not shown) attached to the rear of the body, and these control parts are connected to the cockpit. A tractor is constructed by providing a control section 7 which is seated on a seat 6 and can be operated.

A pair of left and right struts 8, 8 are erected in the traveling body 1 portion at the front of the control section 1, and these are connected at the upper and middle portions by horizontal rod portions 9, 10, respectively, to form a front frame 11. At the same time, a single support 12 is erected in the rear fuselage portion of the control section 1, and the upper part of this support 12 and both lateral ends of the upper horizontal rod portion 9 of the front frame 11 are connected in a substantially U-shape. The upper frame 13 is connected with bolts to form a safety frame for a tractor.

As shown in FIG. 3, the connecting structure between the horizontal rod portion 9 and the upper frame 13 is a side surface in which the horizontal rod portion 9 is wound and welded around a cylindrical bracket 14 that is welded to the horizontal rod portion 9 made of pipe material. A reinforcing member 15 having a U-shape in appearance is welded to increase the attachment strength of the cylindrical bracket 14 to the horizontal rod portion 9, and a connecting member 16 is inserted into the end of the upper frame 13 made of pipe material and plug-welded. Through the cylindrical bracket 14, both 1
4 and 16 are connected by a through bolt.

In this case, one end of the cylindrical body 17 that is fitted onto the upper frame 13 and plug-welded is fitted onto the bracket 14 and butted against the reinforcing member 15, and the other end extends beyond the end of the connecting member 16. This structure is designed to strengthen the upper frame 13 so that bending stress will not be concentrated at the 13 locations near the ends of the connecting member 16, and to enhance the aesthetic appearance.

As shown in FIG. 5, the structure of the support section 8 is such that left and right support sections 8, 8 made of pipe material are divided into upper and lower sections, respectively.
The intermediate horizontal rod portion 10 is welded to the upper ends of the divided lower support columns 8a, 8a to increase the strength at the divided location, and the connecting member 18 is fitted into the upper divided support support 8b. At the same time as plug welding, the upper support portion 8
A reinforcing member 20 in the shape of a split cylinder, which is open on the inside of the fuselage, is welded to the outer side surface of the fuselage at the lower end of b through the cylinder 19, and
The reinforcing member 20 is attached to the horizontal rod portion 10 on the lower support portion 8a.
Insert the through bolt into the reinforcing member 20. The upper and lower support portions 8b are inserted into the lower support portion 8a and screwed into the female threads fixed to the intermediate horizontal rod member 16.
, 8a, so that the support member 8a,
When bending stress is applied to 8b toward the outside of the fuselage, the reinforcing member 20.degree. 20 is configured to counteract this.

Further, the connection structure between the upper frame 13 and the support column 12 is the sixth one.
As shown in the figure, the upper frame 13 is divided at the connection point with the rear strut 12, and the divided upper frames 13a, 13
The T-shaped connecting members 21 are fitted between the spaces a and welded, and the struts 12 are fitted into the T-shaped protrusion 21a, and the reinforcing cylinder 22 is covered and connected with a through bolt. It is.

In summary, the present invention provides a structure of a penetrating tractor safety frame in which the upper frame is divided at the connection point with the rear strut, and the divided upper frame and the rear strut are each connected to each other in a substantially T-shape at the divided point. It is characterized in that a connecting member of the shape is fitted and fixed inside.

In other words, since the upper frame is divided, the molding of the divided upper frame is easier than the method of configuring the upper frame by bending a single piece, and the connecting member that connects the divided upper frames Since the struts are connected to the upper frame and the struts, the strength of the connection between the upper frame and the struts can be increased.

[Brief explanation of the drawing]

The drawings show an embodiment of the structure of the safety frame for a tractor according to the present invention, and FIG. 1 is a side view of the tractor, FIG. 2 is a perspective view of the frame, FIG. 3 is a plan view of main parts, and FIG. 3
FIG. 5 is a partially cutaway side view of the main part, and FIG. 6 is a partially cutaway side view of the main part. 1... Control section, 8... Strut part, 9.
...Horizontal rod part, 11...Front frame,
12... Support column, 13... Upper frame, 13a... Divided upper frame, 21...
・Connection member.

Claims (1)

[Scope of utility model registration request] A front frame 11 consisting of a pair of left and right support sections 8, 8 and a horizontal rod section 9 that connects them at the top is provided at the front of the control section 1, and one support column 12 is provided at the rear of the control section I. This is a tractor safety frame structure in which a substantially U-shaped upper frame 13 is installed upright and extends over both ends of the horizontal rod portion 9 and the upper part of the support column 12, and the upper frame 13 is connected to the rear support column 12. 12, and a substantially T-shaped connecting member 21 is fitted and fixed to each of the divided upper frames 13a, 13a and the rear strut 12 at the divided location. Safety frame structure.