JPS5852049B2 - Vibration device in excavator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an excavator in which a towed excavator such as a subsoiler or a plow woman is connected to a traveling vehicle body such as a tractor so as to be able to rise and fall.

In general, the traction resistance exerted on such excavators is quite large, making it difficult to excavate in deep layers or in hard ground.

For this reason, it has been considered to reduce the traction resistance by towing the excavation rig while applying vibrations, but conventionally, a vibration mechanism was installed in the excavation rig, so the excavation rig could not be used for other types of excavation. The drilling rig pot, which serves as an attachment when replacing the equipment, must have a vibration mechanism, making the cost of the drilling equipment high. Purchasing different types of drilling equipment was economically very difficult.

Furthermore, the distance over which power is transmitted from the PTO shaft of the traveling vehicle body to the vibration mechanism increases, necessitating a long transmission shaft and also requiring a universal joint to raise and lower the excavation equipment. There has been a problem in that the device has become larger and more complex, and its weight has also increased.

The present invention has been made to solve the above problem.

That is, the present invention provides a connecting portion for pivotally connecting one end of the link to the traveling vehicle body, when the towed excavator is connected to the traveling vehicle body via a link configured to be vertically swingable. At the same time, an eccentric cam mechanism is attached to the PTO shaft installed on the traveling vehicle body, and a rod pivotally extended from the cam mechanism is pivotally connected to the swing bracket, and the PTO shaft is mounted on the PTO shaft. The drilling equipment is characterized in that it is configured to force the excavation equipment to vibrate reciprocatingly as the excavator rotates.

In other words, since the vibration mechanism for transmitting vibrations to the excavation rig is also used by the working equipment traction link provided on the machine body side, even if the excavation rig is replaced with another type, The vibration device installed on the fuselage side can be used as is, and the excavation device as an attachment can be used as is.
There is no need for a vibrating device, and the structure can be made simple and very inexpensive.

Furthermore, since the construction is such that the excavating equipment can be connected to links such as the top link and lower link for connecting the traveling vehicle body and the working equipment, the excavating equipment can be connected to other working equipment (such as tilling equipment, etc.) with respect to the machine body. ), just by removing the excavation rig, it is easy to connect the working equipment via the link provided on the fuselage side. Not only can it be lifted up and lowered, but the link can also be swung up and down, so the drilling equipment attached to the link can be moved up and down, making it extremely useful for excavation work as it can adjust the depth of excavation.
It has come to be effective.

In addition, there is no need to extend a long transmission shaft from the traveling vehicle body, unlike when a vibration device is installed on the excavating device 2 taken from the traveling vehicle body 1. There is no need to interpose a transmission mechanism such as a universal joint, and the structure is simple, compact, lightweight, and inexpensive, and the desired vibration can be connected to any drilling equipment 2.
It was possible to give it to

Moreover, since this vibration is a forced reciprocating drive, it has a high ability to destroy soil and can be used extremely effectively for deep excavation and hard ground excavation.

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

FIG. 1 shows an excavator in which a subsoiler 2 is connected to the rear of a traveling vehicle body (tractor) 1 as a towed excavator.

The subsoiler 2 has a plate-shaped vertical arm 5 that extends downward from the rear end of the frame 3 and has an edge 4 on the front edge, and is equipped with a chisel edge 6 and a drilling bullet 7 at the lower end, A lower link 8 and a top link 9 for connection to the traveling vehicle body 1 extend from the frame 3, and the tip of the lower link 8 is pivotally connected to the lower part of the traveling transmission case 10 of the traveling vehicle body 1, and the upper link 9 The tip of the lower link 8 is pivotally connected to the upper end of a T-shaped swing bracket 11 which is pivotally mounted on the upper part of the transmission case 10, and the middle of the lower link 8 is connected to a lift arm 12 provided on the transmission case 10.
is connected to via a hanging rod 21.

The lift arm 12 is driven and oscillated only in the upward direction by a single-acting hydraulic cylinder (not shown), is oscillated downward by the weight of the subsoiler 2, and is configured to be able to descend and stop at any position. ing.

Further, from the rear end of the transmission case 10, there is a direction P toward the rear.
There are three TO shafts with one axis, and a three-core cam mechanism 14 with one PTO axis.

This eccentric cam mechanism 14 has a camshaft 16 that is eccentric to the PTO axis on a cylindrical shaft 15 that is spline-fitted onto the PTO shaft 13.
A rod 18 is pivotally connected via the rod 1.
The upper end of 8 is pivotally connected to the lower end of the swing bracket 11.

Further, a cylindrical case 20 that is externally fitted onto the cylindrical shaft 15 through a bearing 19 is removably attached to a PTO shaft support location on the rear end surface of the transmission case 10.

The present invention is constructed as described above, and by rotating the PTO shaft three times around one axis, the eccentric cam mechanism 14 forcibly swings the swing bracket 11 back and forth, and the upper and lower links 9 , 8 and the subsoiler 2 as a whole.

The rod 18 is configured to be extendable and retractable with a screw type, and this adjustment changes the swing center position of the connection point between the swing bracket 11 and the top link 9, thereby reducing vibrations in the longitudinal and vertical directions. It is possible to change the ingredients.

[Brief explanation of drawings]

The drawings illustrate embodiments of the excavator according to the present invention, and the first
The figure is an overall side view, the second figure is a partial longitudinal side view of the vibration, and the third figure is a side view of the vibration.
The figure is a view taken along the line A--A in FIG. 2. 1... Traveling vehicle body, 2... Excavation equipment, 1
1... Swing bracket, 13...PT
O-axis, 14...cam mechanism, 1 B--rod, 8, 9...link.

Claims (1)

[Claims] 1. To connect the towed excavation equipment 2 via the links 8 and 9 configured to be vertically slidable with respect to the traveling vehicle body 1, one end of the links 8 and 9 is pivotally connected to the traveling vehicle body 1. At the same time, an eccentric cam mechanism 14 is attached to a PTO shaft 13 mounted on the traveling vehicle body 1, and a rod 18 pivotally extended from the cam mechanism 14 and the aforementioned rocking bracket 11 are pivotally mounted. Pivotally connect the bracket 11,
A vibration device to be attached to an excavator, characterized in that it is configured to forcibly vibrate the excavator 2 in a reciprocating manner as the PTO shaft 13 rotates.