JPS5917951Y2 - Bullet support device of culvert forming device - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a bullet support device for a conduit forming device.

This invention will be explained below based on embodiments shown in the drawings.

First, the structure of the idea will be explained.

Reference numeral 1 denotes a machine frame. A hitch 5 for connecting the top link 3 and lower link 4.4 of the agricultural tractor 2 is attached to the front end of the machine frame 1, and a tail is attached to the rear end of the machine frame 1. A ring 6 is detachably attached.

7 is a reinforcing rod for reinforcing the machine frame 1 and the hitch 5.

Reference numeral 8 denotes an input shaft that is rotatably mounted on the machine frame 1 along the longitudinal direction.
Power is transmitted from the shaft 9 via a transmission device 10, and an eccentric cam body 11 is integrally fixed to the rear end of the input shaft 8.

Reference numeral 12 denotes a tilled soil vertical cutting blade. During work, the cutting blade 12 advances while being buried in the soil, and its front edge is used as the blade edge 12a, and the lower end of the tillage vertical cutting blade 12 is used for excavating soil. The body 14 is fixed.

A spring 15 is interposed between the rotating frame 13 and an arm 16 attached to the machine frame 1 located on the rear side of the rotating frame 13, and is wound around a rod 17. It urges the rotating frame 13 forward.

Reference numeral 18 denotes a crank, and an intermediate bent portion of the crank 18 is pivotally supported at a portion above the pivot portion 13a of the rotating frame 13 in the machine frame 1, and the eccentric cam body 11 is attached to the front end of the crank 18. A cam floor 19 is supported on the upper rear end of the crank 18, and a roller 20 is supported on the rear upper end of the crank 18 to receive the frontward pressing force of the spring 15 of the rotating frame 13. 11 rotations and spring 1
The rotating frame 13 is configured to vibrate back and forth via the crank 18 due to the pressing force of 5.

The lower end of the tillage vertical cutting blade body 12 has a long support hole 12b extending in the front-rear direction, and the length L of the support long hole 12b in the front-rear direction is set to the lower end of the tillage vertical cutting blade body 12. It is configured to be slightly longer than the longitudinal swing length l of the excavated body 14, and a connecting rod 21 is connected to the support elongated hole 12b so that the connecting rod 21 can be freely moved into the support elongated hole 12b. A bullet 22 is attached to the rear end of the connecting rod 21.

Next, the effect of the invention will be explained.

When power is transmitted from the PTO shaft 9 to the input shaft 8 and the input shaft 8 is rotated, the eccentric cam body 11 causes the crank 18 to vibrate.

Then, due to the roller 20 of the crank 18 and the pressing force of the spring 15, the rotating frame 13 vibrates back and forth around the pivot portion 13a, and the tilled soil vertical cutting blade 12 and the excavator 14 swing back and forth.

In this state, the cultivated soil vertical cutting blade body 12 and the excavation body 14
When the tiller moves forward while forcibly swinging back and forth, the tillage vertical cutting blade 1
The blade edge 12a of the bullet 2 cuts the soil and moves forward while digging a hole with the excavator 14, and the following bullet 22 expands the hole dug with the excavator 14 and solidifies the surrounding area, forming a cylindrical hole. It continues to form.

In this way, the soil is incised and a cylindrical hole is formed. When attaching the subsequent bullet 22 to the excavation body 14 via the connecting rod 21, the tilled soil vertical cutting blade body 12 is
The connecting rod 21 is supported by the longitudinal support hole 12b formed at the lower end of the tiller, and this support hole 12b is configured to be slightly longer than the longitudinal swing length of the lower end of the tillage vertical cutting blade 12. ing.

Therefore, the bullet 22 is pulled forward when the tillage vertical cutting blade body 12 moves forward, but when the tillage vertical cutting blade body 12 moves backward, the connecting rod 21 on the bullet 22 side closes in the support hole 12b. , and no backward pressing force is applied to the bullet 22. Therefore, when the tillage vertical cutting blade body 12 moves backward, the bullet 22 does not move backward, and the bullet 22 does not move backward. 22, it is possible to form a linear hole.

This idea is based on a vertical tillage blade body 12 that vibrates in the front and rear directions on the frame.
At the lower end of the vertical blade body 12, a connecting rod 21 supporting a bullet 22 at the rear is movable in the front-back direction over a range longer than the amplitude of the lower end of the vertical blade body 12. Since this is a bullet support device of the underdrain forming device which is fitted and connected to the underdrain, when the tillage vertical cutting blade body 12 swings forward, the bullet 22 is pulled and moved forward to form the hole.
When moving the cultivated soil vertical cutting blade 12 backward, the bullet 22
There is no force acting on the bullet 22 to cause it to retreat backwards, and the bullet 22 is in a stopped state. Therefore, as the bullet 22 retreats backwards, the straight cylindrical hole does not move up and down. can be formed by the bullet 22.

[Brief explanation of the drawing]

The drawing is a side view showing an embodiment of this invention.

Claims (1)

[Scope of utility model registration request] A vertical tillage blade body 12 that vibrates in the front-rear direction is supported and provided on the frame, and a connecting rod 21 supporting a bullet 22 at the rear is attached to the lower end of the vertical blade body 12. A bullet support device for a culvert forming device which is fitted and connected so as to be movable in the front and back direction over a range longer than the amplitude of the part.