JPH0310837Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial field of application) The present invention is a system in which a digging blade is interlocked and connected to a digging drive device installed on a lifting frame extending from the vehicle body. While the blade is vibrated by the operation of the vibration generating case part of the excavation drive device, it is cut into the soil by the downward movement of the lifting frame, and the soil is scooped out by the operation of the transmission case part of the excavation drive device. The present invention relates to an excavator configured to excavate the roots of seedlings and the like by rotating the excavator, and particularly to a structure in which an interlocking attachment portion of an excavation blade drive device has been improved.

(Prior art) The excavating blade drive device of the above-mentioned excavator has a case body of a vibrating case part rotatably pivoted to a rearward extension part of a digging blade shaft supported by a transmission case part. Then, an eccentric with a rotating shaft is installed on the outer periphery of the shaft support in the case body chamber, and the rotating shaft of each eccentric is interlocked and connected to the output shaft of the output case by a transmission gear mechanism, so that the forced force of each eccentric is It is configured to generate vibrations through rotation and impart vibrations to the digging blade.

However, the mechanism in which the vibration case part is assembled to the transmission case part that supports the excavation blade shaft is quite heavy, so this heavy mechanism is lifted and the transmission gear mechanism in the vibration case part is attached to the output case side. It is difficult to assemble the transmission gear mechanism to the output case while interlockingly connecting it to the output shaft of the generator. This makes the connection and installation work even more difficult, and a problem arises in that the eccentric element is easily assembled with the eccentric rotation timing position shifted.

(Purpose of the invention) This invention aims to prevent the eccentric element of the vibration case from shifting when assembling a mechanism in which the vibration case part is assembled to the transmission case part while interlockingly connecting it to the output case side. It is an object of the present invention to maintain the set state as shown in FIG.

(Devised configuration) That is, the present invention rotatably pivots the vibration generating case body 13 to the rear extension portion 8a of the excavation blade shaft 8 supported by the transmission case portion A, and the shaft support in the vibration generating case chamber. Eccentric elements 17, 17 are installed on the outer periphery of 14 with rotating shafts 16, 16, and each rotating shaft 16, 16 is interlocked and connected to the output shaft 25 of the output case E, so that the eccentric element is forcibly rotated. In the digging blade drive device of the digging machine, counter gears 22, 22 are meshed with passive gears 20, 20 of the respective rotating shafts 16, 16, respectively, and each counter gear 22, 22 is connected to the digging blade. A thin timing gear 23 fitted to the shaft is engaged with the drive gear 24 of the output shaft 25 extending from the output case E, and the drive gear 24 of the output shaft 25 is inserted into the lateral side of the timing gear 23 and connected to the counter gears 22, 22. It is characterized by being made to mesh.

(Example) Hereinafter, an example of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a side view of the excavator with a part of the car body cut away, and FIG. 2 is a plan view of the excavator.

Although some parts of the car body C of the excavator are omitted, it is a self-propelled type in which a crawler running section 2 is installed at the bottom of a chassis 1, and the crawler running section is driven by an engine 3 mounted on the chassis. The vehicle is configured so that it can be operated using a control unit (not shown in the figure) at the rear of the chassis, and the work equipment mounting parts 4, 4 and the power transmission mechanism 5 for the work equipment are located at the front of the vehicle body.
A hydraulic mechanism (not shown) for lifting and lowering the work equipment and for rotating the work equipment is also installed in a part of the vehicle body.

The lifting frame D of the excavating working machine is attached to the working machine mounting parts 4, 4.
is formed of a base frame 6 whose rear base is attached to the mounting parts 4, 4 so as to be vertically swingable about a horizontal horizontal axis, and a blade tip holding arm 7 extending from the front end of the base frame, and the blade tip holding arm 7 extends from the front end of the base frame. It is constructed so that it can be raised and lowered by operating a hydraulic cylinder within the mechanism.

A drive device for operating the digging blade is installed in the base frame 6 portion of the lifting frame D, and this drive device is connected to the output case E and the vibration case E, which are arranged in order from the rear to the front. The output case E and the transmission case part A are fixed to the base frame 6, but only the vibration generating case part B is installed without being fixed to the base frame 6. .

Although the internal structure of the transmission case part A located in the front part of the base frame 6 is omitted, a digging blade shaft 8 with an axis P facing forward and backward is supported inside the case body 12. 8 is housed in a case, and the rear end of the digging blade 9 is fixed and interlocked with the front protruding end of the digging blade shaft 8. done to.

Note that, as shown in FIG.
(see figure) has an appropriate width and is formed in a shape having a blade portion 10 at the front edge in the width direction, and the tip has a rotation center located on a line extending forward from the axis P of the digging blade shaft 8. Attach the boss part to the blade tip holding arm 7
It is rotatably supported on the support part 11 of the.

The rear part of the digging blade shaft 8 is a transmission case part A.
The rear protruding portion 8
a is the housing case body 13 in the vibration generating case portion B;
The case body 13 is inserted through the central shaft support 14 of the case body 13.
The excavation blade shaft 8 is supported so as to rotate as the excavation blade shaft 8 rotates.

Inside the case body 13, the central shaft support 14 is provided.
Eccentric housing chambers 15, 15 are formed at positions 180 degrees apart from each other, and can be independently isolated from each other.
Eccentrics 17, 17 supported by 6 are installed.

One end of the rotating shaft 16, 16 of each eccentric is protruded into a sub-chamber 19 formed by attaching a lid 18 to the rear of the case body 13, and passive gears 20, 20 are installed in the protrusion. It is fitted.

Each driven gear 20, 20 is a counter gear 22, 22 supported in the subchamber 19 by a pivot 21, 21.
The respective counter gears 22,
22 is meshed with a timing gear 23 and a drive gear 24.

The timing gear 23 is formed to have a thin width and is fitted onto the digging blade shaft 8 that protrudes into the auxiliary chamber 19, and the drive gear 24 is arranged concentrically with the digging blade shaft 8 from the output case E side. is integrally provided at the end of the output shaft 25 protruding into the auxiliary chamber 19,
It is located parallel to the side of the timing gear 23 and meshed with the counter gears 22, 22.

The end of the output shaft 25 is overlappingly fitted to the outer end of the digging blade shaft 8 via a bearing 26, and the outer circumference is supported by another bearing 27 on the inner diameter of the shaft support cylinder 28. Further, the outer diameter portion of the shaft support cylinder 28 is configured to rotatably support one end portion of the case body 13 of the vibration generating case portion B.

A passive gear 29 is fitted to the inner end of the output case of the output shaft 25, and the passive gear 29 is configured to be capable of transmitting power to the speed increasing transmission mechanism housed within the output case. transmission mechanism 5
It is configured so that it can be input using .

Note that 30 is a closing lid attached to the inlet of the eccentric housing chamber. Further, the two eccentric elements 17, 17 are provided so as to rotate with a phase shift of 180 degrees in the rotational direction, as shown in FIG.

Therefore, in the device configured as described above, the eccentrics 17, 17 are installed and pivoted into the housing chambers 15, 15 from the installation port of the case body 13, and each housing chamber is filled with lubricating oil and closed. The ends of the rotating shafts 16, 16 are closed with lids 30, 30, respectively, and the subchambers 19 are closed.
protrude to the side.

Passive gears 20, 20 are attached to the respective protrusions.
and counter gears 22, 22 that mesh with the respective driven gears 20, 20 are assembled to the case body 13 with the pivots 21, 21, and the cover body 18 is assembled, and the subchamber 1 is assembled.
The assembly of the vibration case part B is completed by making it possible to put lubricating oil into the inside 9.

The vibration generating case part B assembled as described above is assembled by fitting and attaching the central shaft support 14 of the case body 13 to the digging blade shaft 8 that projects rearward from the transmission case part A. 8.

A timing gear 23 is attached to the protruding portion of the digging blade shaft 8 in the sub-chamber 19 by fitting it from the shaft end, so that the eccentrics 17, 17 are positioned at positions 180 degrees out of phase with each other. The counter gears 22, 22 are brought into mesh with each other while being adjusted.

Furthermore, by placing it as above, output case E
If the side output shaft 25 is fitted and inserted from the end of the digging blade shaft 8, the drive gear 2 at the end of the output shaft 25
4 meshes with the counter gears 22, 22 whose positions are set by the timing gear as described above, and the outer diameter part of the shaft support cylinder 28 is connected to the housing case body 13.
Since one side of the is rotatably supported,
Thereafter, by assembling and fixing the output case E to the base frame 6, the entire drive section can be assembled.

When carrying out excavation work, the vehicle body C with the elevating frame D in the raised state is driven appropriately, and the excavation blade 9 is in the state shown in Fig. 2 and in the state shown by the solid line in Fig. 1. When the drive unit is transmitted to the drive unit and starts operating, the eccentrics 17, 17 of the vibration generating case part B in the drive unit
Drive gear 24, counter gear 2 by the power of 5
2, 22, the rotating shaft 1 via the passive gears 20, 20
The excavating blade shaft 8 and the excavating blade 9 are rotated at high speed around the centers 6 and 16 to generate vibration, thereby imparting vibration to the excavating blade shaft 8 and the excavating blade 9.

Therefore, in this state, the elevating frame D is
When the digging blade 9 is lowered as shown by the imaginary line in the figure, it cuts into the soil near the roots of the sapling while vibrating back and forth in the digging direction. During this digging, the transmission case part A in the drive part When rotated appropriately, the digging blade 9 rotates around the digging blade shaft 8, scoops out the soil near the roots, and leaves the roots of the seedlings in a planting position with a roughly hemispherical root pot. It will be separated from the place.

Once the roots have been cut off, the transmission case part A is operated to rotate the digging blade so that it touches the bottom of the root ball, and the lifting frame D is raised to remove the root ball that has been dug out. The seedlings are lifted from the planting site and the digging process is completed.

In addition, when the digging blade 9 excavates into the soil, the position of the vibration generating case part A is made to follow and change so that vibrations in an appropriate direction are always applied to the digging blade even if the digging direction changes. However, since the eccentrics 17 and 17 are housed and installed in storage chambers 15 and 15 provided independently and isolated within the case body 13, and are lubricated with the lubricating oil in each chamber, the case body 13 No matter what rotational position the lubrication oil is placed on, it can vibrate in a stable state without uneven soaking in the lubricating oil.

(Effects of the invention) As described above, in the invention, the eccentric rotating shafts 16, 1 of the vibration case part in the excavation blade drive device
Counter gears 22, 22 are meshed with passive gears 20, 20, which are fitted and fixed to the excavation blade shaft 8, respectively, and each counter gear 22, 22 has a thin timing gear 23 fitted and pivotally supported on the excavation blade shaft 8 side. Output shaft 2 that meshes with each other and extends from output case E
Since the drive gear 24 on the 5th side is inserted into the side part of the timing gear and meshed with each counter gear 22, 22 to be interlocked, each eccentric element 17, 17 is placed at a predetermined timing position. If the timing gear 23 is inserted into the excavation blade shaft 8 and meshed with the counter gears 22, 22, the relative position of the eccentric will remain in the predetermined state no matter how the timing gear is rotated. Therefore, when assembling a heavy mechanism in which the vibration generating case part is attached to the transmission case part while interlockingly connecting it to the output case side, the positional deviation of the eccentric elements 17, 17 can be completely ignored. Since it is only necessary to concentrate on inserting the drive gear 24 into the side portion of the timing gear 23, there is an advantage that the connection work can be performed extremely easily.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which Fig. 1 is a side view of an excavator with a part of the car body cut away, Fig. 2 is a plan view of the excavator, and Fig. 3 is an excavator blade drive device. FIG. 4 is a cross-sectional view taken along the line A--E of FIG. 3, FIG.
It is a sectional view of Rollo in the figure. 8... Excavation blade shaft, 8a... Rear extension part,
13... Vibration case body, 14... Pivotal support, 16...
...Rotating shaft, 17... Eccentric element, 20... Passive gear,
22... Counter gear, 23... Timing gear, 24... Drive gear, 25... Output shaft, A...
Transmission case section, E... Output case.

Claims (1)

[Scope of utility model registration request] Excavation blade shaft 8 supported by transmission case part A
The vibration generating case body 13 is rotatably pivoted to the rear extension portion 8a of the vibration generating case, and eccentric elements 17, 17 are installed on the outer periphery of the shaft support 14 inside the vibration generating case chamber, and eccentric elements 17, 17 are installed with rotating shafts 16, 16. 16, 16 are interlocked and connected to the output shaft 25 of the output case E to forcibly rotate the eccentric element. , 20 have counter gears 2 and 20, respectively.
2 and 22 and each counter gear 2
2 and 22 mesh with a thin timing gear 23 fitted to the excavation blade shaft, and a drive gear 24 of an output shaft 25 extending from the output case E.
An interlocking mounting structure for an excavating blade drive device in an excavator, characterized in that the timing gear 23 is inserted into a side part of the timing gear 23 and meshed with the counter gears 22, 22.