JPH0716756Y2 - Excavator rod turning device in excavator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a drill rod swivel device for a multi-axis auger excavator and other excavators including various excavating rods.

(Prior Art) For example, when excavating a corner portion by a multi-axis auger excavator equipped with three augers in parallel, the multi-axis auger can be turned at a desired angle without moving the base machine and the mast depending on the environment of the excavation site. If it is possible to change the direction, it may be advantageous in work. Therefore, conventionally, a casing is mounted below a drive unit composed of an electric motor and a speed reducer supported on a mast so that the main driven shaft and the main driven shaft are connected to the output shaft of the drive unit inside the casing. In a multi-axis auger excavator in which two auxiliary driven shafts connected to each other via gear trains are rotatably supported and augers are respectively connected to lower ends of the driven shafts, the casing is provided with the main driven shaft. There is known a multi-axis auger revolving device equipped with a pair of hydraulic cylinders which are mounted so as to be revolvable around a shaft and which reciprocally drive the casing.

(Problems to be solved by the invention) However, under the present circumstances in which this conventional device is a large and heavy object and an electric motor is frequently used in the drive section, a dedicated hydraulic drive source and required equipment are prepared for the turning hydraulic cylinder. What you have to do is a huge disadvantage.

The present invention aims to eliminate the drawbacks of the prior art.

(Means for Solving the Problems) In order to solve the above problems, the present invention is based on the idea of using a rotation transmitted from a drive unit to one of the driven shafts to rotate an excavation rod, and its structure is , Under the drive unit supported by the mast so that it can move up and down,
A main driven shaft connected to the output shaft of the drive unit in one casing, and 1 connected to the main driven shaft via a gear train.
Alternatively, in an excavator in which a plurality of sub-driven shafts are supported in parallel with each other and an excavating rod is connected to one or all lower ends of the driven shafts, the casing is reciprocally rotatable about the main-driven shafts. A clutch means that supports the casing and can be freely engaged with and disengaged from any of the sub driven shafts, and that stops the rotation of the sub driven shaft when locked and revolves around the main driven shaft. Further, the casing is equipped with a locking means that can be operated from the ground so as to lock the casing in a desired turning position in a disengageable manner.

It is as a configuration.

In the present invention, "supporting" the revolving casing so that it can freely reciprocate includes the case where it is directly supported by the main driven shaft, and the case where it is supported by the mast or the drive unit via a supporting portion. Further, the "drilling rod" is used as a generic term for various other things such as an auger, a rod having a stirring blade, a rod having a spiral blade and a stirring blade, and the like. Further, the "driven shaft" for connecting the excavating rod includes a case where both the main driven shaft and the sub driven shaft are connected, and a case where only the sub driven shaft is connected.

An embodiment of the present invention will be described below with reference to the drawings.

(Example) In FIGS. 1 and 2, the upper end of the mast (3) is supported on the upper end of the boom (2) extending from the base machine (1),
A wire rope in which a driving part carrier (5) is slidably engaged with and supported by guide rails (4), (4) laid on the front of the mast (3) and extending over the entire length, and which is suspended from the upper end of the mast. (6) hangs up and down so that the carrier (5) is provided with a drive unit consisting of an electric motor (7) and a speed reducer (8), and the casing (1
8) through 3 drilling rods (10), (10a), (10
b) are hung parallel to each other and the casing (18) is equipped with a drill rod turning device. The drilling rods (10), (10a), (10b) in this example are provided with a double spiral blade (11) having a drilling blade at the lower end of the rod and a stirring blade (12) ... is there.

The structure of the excavating rod turning device is as follows. Third,
In FIGS. 4 and 5, the stepped main and driven shafts (14) are concentrically connected to the output shaft (13) protruding from the lower surface of the drive unit, while sliding on the guide rails (4) and (4) of the mast. The bearings (17) and (17) are fixed to the upper and lower brackets (16) and (16) projectingly provided to the movably engaged auxiliary carrier (15),
Both upper and lower ends of the main driven shaft (14) are rotatably supported by both bearings, and the bearings (17), (17) are attached to the main driven shaft (14).
In between, the casing (18) is rotatably and reciprocally supported on the horizontal plane via the bearings (19) and (19) by utilizing the stepped portion of the main-driven shaft.

In the casing (18), the main driven shaft (1
The sub-driven shafts (14a) and (14b) are rotatably supported in parallel on the left and right sides of 4) via bearings (20) and (20), respectively, and fixed to the main driven shaft (14). The sub gears (21a) and (21b) fixed to the sub driven shafts (14a) and (14b) are engaged with the gear (21) from the left and right, and these main and sub driven shafts (14), (14a) and (14b) are engaged. At the end protruding from the lower surface of the casing (18) of
The upper ends of (10b) are concentrically connected by joints (23).

As locking means for fixing the casing (18) so that it cannot be swung at a desired swiveling position, a lock engaging plate (24) horizontally projecting from the rear side surface of the casing (18) is provided with In this example, three locking holes (25) are opened at intervals of 45 degrees at positions on an arc centered on the axis of the main driven shaft (14), while the front surface of the auxiliary carrier 15 is opened. A bracket (26) having a pair of upper and lower through holes (27) sandwiching the locking plate (24) is projectingly provided on the bracket.
The lock pin (29) is slidably inserted into the cylinder (28) fixed vertically to the lower surface of the cylinder, and the tip of the lock pin (29) is moved by the coil spring (30) to the upper end of the opening of the cylinder (28) and the bracket (26). ) Of the lock pin (29) and the pull rod (31) connected to the lower end of the lock pin (29) penetrates the lower end of the cylinder (28) and the bracket (16) and projects downward. Ring with protruding ends (32)
The lock pulling rope (33) is connected to and is hanging to the ground. Therefore, now, as shown in FIG. 4, the lock pin (29) is conventionally inserted into the through hole (27) of the bracket (26) and one of the locking holes (25) of the locking plate (24), and the casing (18). When the rotation of the drive unit is transmitted to the main driven shaft (14) while the motor is locked so that it cannot rotate, the rotation is transmitted from the main gear (21) to the sub gears (21a) and (21b). Driven shaft (14a), (14b)
To the drilling rods (10), (10
A) and (10b) rotate, and excavation becomes possible.

Next, as a clutch means for locking the casing (18) to the sub driven shaft (10b), a bracket (34) projecting on the lower surface of the casing (18) near the sub driven shaft (10b)
The middle portion of the clutch bar (35) having the pawl (36) at one end is pivotally supported in a direction in which the pawl (36) comes in contact with and separates from the outer peripheral surface of the protruding lower portion of the sub-driven shaft (10b). , The claw (36) of the clutch lever (35) is the sub-driven shaft (10b).
The coil spring (37) constantly repels the clutch lever (35) on the outer peripheral surface of the lower protruding portion of the sub-driven shaft (10b) (four in this example) from the clutch lever (35). ) Is rocked against the spring (37), the claw (36)
It is projected at 90 degree intervals at the position where it is locked. (39) is a clutch pulling rope which is connected to the other end of the clutch lever (35) and hangs down to the ground.

Now, with the casing (18) in the normal position shown in FIG. 5,
The rotation of the drive unit is changed from the main gear (21) to the auxiliary gear (21a), (21
b) to each gear (21), (21a), (21b), each driven shaft (14), (14a), (14b), and each drilling rod (1
0), (10a), (10b) are respectively rotated in the directions of the arrows in FIG. 5 to perform excavation for one stroke, and then when excavating the corner portion, the excavation rod group (10), if necessary,
If you want to turn the whole of (10a) and (10b) by 45 degrees, first pull the lock pulling rope (33) to retract the lock pin (29) to the unlock position while continuing the above rotations.
The casing (18) is placed in a rotatable state, and then the clutch pulling rope (39) is pulled to swing the clutch lever (35) against the spring (37) in the clockwise direction in FIG. ) Is engaged between the locking teeth (38) (38) of the sub driven shaft (10b) to integrally connect the casing (18) with the sub driven shaft (14b) and the sub gear (21b). As a result, the sub gear (21b) that has been rotating up until then becomes non-rotatable and its rotation is stopped, and as a result, the sub gear (21b) becomes the main gear (2b).
The circumference of 1) revolves around the main gear (21) in the same direction as the direction of rotation, and the casing (18) causes the main gear (21), that is, the axis of the main driven shaft (14) to follow the revolution. It turns in the same direction with the center as the center (in the direction of the arrow in FIG. 5). When the casing (18) turns 45 degrees, the lock pull rope (3
When the pull of (3) is released, the lock pin (29) is repulsed upward by the spring (30) to engage with the new locking hole (25) from the through hole (27) of the bracket (26). Locks the casing (18) at the 45-degree turning position.

When returning the casing (18) to the normal position, the motor (7)
And rotate the casing (1
It is enough to turn 8) back to the original position by 45 degrees.

(Effect of the Invention) The excavating rod swivel device in the excavator of the present invention is smaller and lighter than the conventional device, and the drive unit of the excavator is based on any type of drive source such as an electric motor or a hydraulic motor. However, the turning device of the present invention can be immediately used without separately preparing a dedicated drive source, which is extremely economically advantageous.

[Brief description of drawings]

The drawings show an embodiment of the present invention. Fig. 1 is a side view of the entire excavator, Fig. 2 is a front view of the same with the base machine omitted, and Fig. 3
The figure is an enlarged vertical front view of the casing portion, FIG. 4 is a semi-cut sectional view taken along line IV-IV of FIG. 3, and FIG. 5 is VV of FIG.
It is a line sectional view. 3 ... Mast, 7 ... Electric motor, 10, 10a, 10b ... Drilling rod, 14 ... Main driven shaft, 14a, 14b ... Sub driven shaft, 18 ... Casing, 21 ... Main gear, 21a, 21b ... Sub gear, 24 ... Lock locking plate, 29 ... Lock pin, 35 ... Clutch lever, 38 ... Locking teeth.

Claims (1)

[Scope of utility model registration request] 1. A main drive shaft connected to an output shaft of the drive unit in one casing below a drive unit supported by a mast so as to be movable up and down, and a main drive shaft and a main drive shaft connected to each other via a gear train. An excavator in which one or more auxiliary driven shafts are supported in parallel with each other, and an excavating rod is connected to one or all lower ends of the driven shafts, wherein the casing reciprocates about the main and driven shafts. The casing is rotatably supported, and the casing can be engaged with and disengaged from any of the sub-driven shafts. When the casing is locked, the sub-driven shaft stops rotating and revolves around the main-driven shaft. An excavating rod swiveling device for an excavator, which is equipped with a clutch means and a locking means that is operable from the ground to lock the casing in a desired swiveling position in a disengageable manner.