JP2747214B2 - Auger screw drive - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an auger screw drive for rotating an auger screw by a drive motor via a speed reducer.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 7, an auger screw drive device uses a bolt (not shown) to connect a flange 202 formed on a main body of a speed reducer 200 and a flange 206 formed on a main body of a drive motor 204. Combine
The reduction gear 200 was housed in the frame 208.

[0003] Guide gibs 210 and 212 slidably engaged with guide rails of a leader (not shown) are fixed to both ends of the frame 208. During excavation, the guide rail is set up vertically, and the frame 208 is raised and lowered. Therefore, it is preferable that the center of gravity of the heavy drive motor 204 is at a position as low as possible, that is, at a position close to the guide rail. If the center of gravity is far from the guide rail,
A large moment acts on the guide gibs 210, 212, causing uneven wear of the guide gibs 210, 212.

Accordingly, the frame 208 is substantially inverted "U"
The guide rail side of the frame 208 is opened, the drive motor 204 is protruded from the frame 208, and the center of gravity of the drive motor 204 is configured as close to the guide rail as possible. The drive motor 204 covers both side surfaces and the upper surface, and
4 is protected. Further, the main body of the speed reducer 200 is fixed to the frame 208 by a plurality of bolts 214 penetrating through the side surface of the frame 208.

[0005]

In such a conventional motor, when it is necessary to replace the drive motor 204 due to a failure such as burnout, the flanges 202 and 206 are surrounded by the frame 208 (see FIG. 1). 7 (a)) For example, it is conceivable to remove the cover 209 of the frame 208 and loosen the bolts fastening the two flanges 202, 206.

However, since the space between the motor 204 and the frame 208 is small, it is difficult to loosen the bolts. Further, it is necessary to loosen the bolts while supporting the motor 204 by suspending with wires. The motor 204 hung by the wire or suspended by the wire
It is difficult to take out and replace it from the inside. To facilitate this work, it is conceivable to increase the space, but there is a problem that the width of the frame 208 increases and the weight also increases.

[0007] Therefore, when replacement is necessary, first, the hanging sheave block 216 is removed from the frame 208, and a plurality of bolts 214 are loosened. The drive motor 204 is pulled out (FIG. 7B). When the speed reducer 200 and the drive motor 204 are integrated, they are unstable. Therefore, the speed reducer 200 and the drive motor 204 need to be mounted on a stand (not shown) that supports the speed reducer.

Then, the drive motor 20
4 is removed (FIG. 7C), replaced with a new drive motor 204, and attached to the speed reducer 200. After attaching the speed reducer 200 to the frame 208 with the plurality of bolts 214, the suspension sheave block 216 must be attached to the frame 208, and in this case, there is a problem that the replacement operation is difficult.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide an auger screw drive device which facilitates the work of replacing a drive motor, with the object of solving the above-mentioned problems.

[0010]

In order to achieve the above object, the present invention has the following structure as means for solving the problems. That is, while the main body of the drive motor is flanged to the main body of the speed reducer to which the auger screw is connected,
A frame to which the main body of the speed reducer is fixed is slidably supported on a guide rail of a reader via a guide gib, and the frame is moved along the guide rail via a hanging sheave rotatably supported by the frame. In the auger screw drive device for raising and lowering and rotating the auger screw to excavate, the lower frame fixed to the main body of the speed reducer so that the frame can release the flange connection and remove the drive motor. A main frame that covers the drive motor protruding from the lower frame and rotatably supports the suspension sheave. The main frame detachably connects the lower frame and the main frame, and the lower frame and the main frame. The auger screw drive device, wherein the guide gibs are arranged respectively. Configuration is it.

Further, the lower frame is provided with a leg member for supporting the lower frame substantially horizontally when the reduction gear to which the drive motor is attached is fixed and the guide gib is set down. It may be.

[0012]

In the auger screw driving device having the above structure, the connection between the lower frame and the main frame is released, and the main frame covering the drive motor is removed. Then, the flange connection between the speed reducer and the drive motor is released, the drive motor is detached from the speed reducer, and replaced with a new drive motor. Then, since the main frame is connected to the lower frame again so as to cover the drive motor, the drive motor can be easily replaced.

Further, since the lower frame is provided with the leg members, even if the main frame is removed from the lower frame, the lower frame is supported substantially horizontally.
The operation of removing the drive motor by releasing the flange connection becomes easy.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a front view of a construction machine using an auger screw driving device according to one embodiment of the present invention. 1 is a self-propelled construction machine for an earth auger, and a leader 2 is a stay 4
And the catching hawk 6 so as to be able to be turned upside down. Two elongated guide rails 8 and 10 are laid on the front surface of the reader 2 along its longitudinal direction. The guide rails 8 and 10 having a circular cross section are provided with four guide gibs 14 having four frames 12. 17 are engaged.

The frame 12 has a hanging sheave 22.
Is rotatably supported. One end of a wire 24 wound around the suspension sheave 22 is fixed to the upper end of the reader 2, and the other end is rotatably supported by the upper end of the reader 2. The frame 12 is suspended via the suspension sheave 22.

Then, the reel is wound around a winch rotating drum (not shown) provided inside the construction machine 1 via a sheave 30 rotatably supported in the middle of the leader 2 and a sheave 32 provided at the lower end of the leader 2. Then, the frame 12 can be raised and lowered by driving the winch.

As shown in FIGS. 2 to 5, the frame 12 includes a lower frame 34 and a main frame 36. The main frame 36 further includes an upper frame 38 and an intermediate frame 4.
0. As shown in FIG. 3, the lower frame 34 has a pair of guide gibs 15 and 17 fixed by a plurality of bolts 42 (only some of which are shown). The semicircular grooves 44 and 46 corresponding to the outer peripheral shape of the ten are formed.
The guide rails 8 and 10 are inserted into the grooves 44 and 46, and the guide rails 8 and 10 are sandwiched by the two guide gibs 15 and 17 so that the lower frame 34 can be slidably supported in the longitudinal direction of the guide rails 8 and 10. It is configured as follows.

The lower frame 34 includes side plates 48 and 50 erected at predetermined intervals, between which the planetary reduction gear 5 is mounted.
2. A speed reducer 56 having a final-stage speed reducer 54 is housed therein, and the main body of the speed reducer 56 is fixed to the lower frame 34 by a plurality of bolts 58 penetrating through the side plates 48, 50. The speed reducer 56 is configured so that the auger screw 20 can be connected via the joint 60.

A rotary joint 62 is mounted on the reducer 56 on the opposite side of the joint 60 and coaxially with the auger screw 20 so as to supply an augment such as cement milk to the auger screw 20. Further, a flange 64 provided with a plurality of mounting holes 63 is formed on the side opposite to the joint 60. The flange 64 corresponds to a flange 68 formed on the front surface of the drive motor 66. The bolts 65a (see FIG. 2) are inserted into the flanges 68 by fitting the flanges 64 and 68, and the nuts 65b are inserted into the mounting holes 63 of the flanges 64.
And the reduction gear 56 and the drive motor 66 can be flange-coupled.

The flange 64 of the speed reducer 56 is arranged such that the position of the center of gravity of the drive motor 66 to be mounted is as close to the guide rails 8 and 10 as possible, and the speed reducer 56 is fixed to the lower frame 34. so,
The bolts 65a and the nuts 65b of the flanges 64 and 68 are loosened or tightened with a wrench or the like to dispose and connect the flange connection.

In the present embodiment, the side plates 4 and 50 are disposed near the guide rails 8 and 10 near the ends thereof.
8 and 50 are arranged at positions where the bolts 65a and the nuts 65b cannot be loosened or tightened due to obstruction. The drive motor 66 is flanged so as to protrude largely from the lower frame 34. Note that the drive motor 66 may be an electric motor or a hydraulic motor.

Further, an end surface 56a orthogonal to the axial direction of the auger screw 20 formed above the speed reducer 56 has:
As shown in FIG. 3B, three screw holes 67 are formed at equal intervals in a fan shape, and an arc-shaped step 56b is formed. Then, the intermediate frame 40 of the side plates 48, 50
At the side end, through holes 69 are respectively formed in a vertical line along the edge.

As shown in FIG. 6B, the side plates 48 and 50 are fixed to the lower frame 34 with a reduction gear 56 having a drive motor 66 mounted thereon, and the guide gibs 15 and 17 are placed on the ground or floor as shown in FIG. , Leg members 70 and 72 for supporting the lower frame 34 substantially horizontally are attached. In this case, the speed reducer 5 having the drive motor 66 attached thereto
The positions of the centers of gravity of the lower frame 34 and the intermediate frame 40 to which the fixing members 6 are fixed are determined by the guide gibs 15 and 17 and the leg members 70 and 72.
If the upper frame 38 is between them, it is possible to stand alone even when the upper frame 38 is removed.

On the other hand, in the upper frame 38, as shown in FIG. 5, four suspension sheaves 22 are housed between two side plates 74 and 76 which are erected and opposed to each other. 22 is rotatably supported by a support shaft 78 supported by both side plates 74 and 76. The support shaft 78 is arranged on an extension of the auger screw 20.

A pair of the guide gibs 14 and 16 are fixed to the upper frame 38 by a plurality of bolts 80 and 82, and the two guide gibs 14 and 16 are fixed in accordance with the outer peripheral shape of the guide rails 8 and 10. Grooves 84, 8 on the semicircle
6 are formed. The guide rails 8, 10 are inserted into the grooves 84, 86, and the guide rails 8, 10 are sandwiched between the two guide gibs 14, 16, so that the upper frame 38 can be slidably supported in the longitudinal direction of the guide rails 8, 10. It is configured as follows.

A support shaft 78 is provided on both side plates 74 and 76.
And a side plate 74,7 is formed.
The insertion holes 92 are formed by the ring members 90 and 91 fixed to
(Only one is shown) is formed. On the other hand, as shown in FIG. 4, the intermediate frame 40 is formed to have a substantially inverted “U” cross-sectional shape, and is formed so as to cover the drive motor 66 projecting from the lower frame 34 from above. I have. The intermediate frame 40 is formed with support portions 94 and 96 opposed to each other at intervals capable of accommodating the upper frame 38. Both support portions 94 and 96 are provided with through holes 88 and insertion holes 92 of the upper frame 38. , Through holes 98 and 100 (only one is shown) are formed.

The upper frame 38 is accommodated between the support portions 94 and 96, and the pins 10 are inserted into the through holes 88 and 98, and into the insertion holes 92 and 100, respectively.
It is configured such that the upper frame 38 and the intermediate frame 40 can be connected by inserting the 2 and 104. In this embodiment, a separate upper frame 3 is used.
Although the main frame 36 is formed by the intermediate frame 8 and the intermediate frame 40, the present invention can also be applied to a main frame in which these are integrally formed.

The intermediate frame 40 has a mounting surface 40a perpendicular to the axial direction of the auger screw 20 at the end opposite to the upper frame 38. The mounting surface 40a has a screw hole of the speed reducer 56 formed therein. Through hole 1 corresponding to 67
06 is drilled. Also, the edge 4 of the mounting surface 40a
0b is formed in an arc shape corresponding to the step 56b of the speed reducer 56. The lower frame 3 of the intermediate frame 40
A window 107 is formed on the fourth side, so that a bolt 109 can be inserted into the through hole 106 through the window 107.

On the side surface of the intermediate frame 40, mounting portions 110 and 112 are formed at intervals so as to be able to be inserted into both side plates 48 and 50 of the lower frame 34. Screw holes 108 are respectively formed corresponding to the through holes 69 of the frame 34.

The edge 40b of the front end of the intermediate frame 40 is aligned with the step 56b of the speed reducer 56 fixed to the lower frame 34, and the end surface 56a and the mounting surface 40a are aligned. The mounting portions 110, 1 are provided inside the side plates 48, 50.
Positioning is performed by inserting 12.

Next, a bolt 109 is inserted into the through hole 106 through the window 107 and screwed into the screw hole 67 of the speed reducer 56. Further, the bolt 11 is inserted into the through hole 69 of the lower frame 34.
4 and screwed into the screw holes 108 of the intermediate frame 40 to connect the lower frame 34 and the intermediate frame 40.

By loosening these bolts 109 and 114, the intermediate frame 40 can be removed from the lower frame 34, and when reassembled, the positioning is performed by the edge 40b, the step 56a, etc., and the upper frame 38
The positions of the grooves 44, 46, 84, 86 between the guide gibs 14, 16 of the lower frame 34 and the guide gibs 15, 17 of the lower frame 34 coincide with the guide rails 8, 10.

Next, the operation of the auger screw driving device of the present embodiment will be described. First, as shown in FIGS. 1 and 2, a wire 24 is hung on a suspension sheave 22 and lifted, and grooves 44 and 4 of each of the guide gibs 14 to 17 are lifted.
6, 84, 86 are engaged with the guide rails 8, 10.
Then, the auger screw 20 is connected to the speed reducer 56 via the joint 60.

When the wire 24 is wound up, the frame 12 moves up along the guide rails 8 and 10, and when the wire 24 is fed, the frame 12 moves down. When the drive motor 66 is driven, the speed reducer 56,
The auger screw 20 is rotated via the joint 60 to perform excavation.

The drive motor 6 is driven by a change in load during excavation or the like.
6 may be burned out, and the driving motor 6
6 may fail and the drive motor 66 may need to be replaced. In this case, the auger screw 20 is removed, and the frame 12 is lowered to remove the frame 12 from the guide rails 8 and 10.

Then, as shown in FIG.
Place it on the ground or floor with 4-17 down (Fig. 6
(I)). Next, the pins 102 and 104 are removed, and the upper frame 38 is removed from the intermediate frame 40. Also, the bolt 109 is loosened with a spanner or a wrench through the window 107, and the bolt 114 is similarly loosened to remove the intermediate frame 40 from the lower frame 34 (FIG. 6).
(B)). In this state, the lower frame 34 is supported substantially horizontally by the guide gibs 15 and 17 and the leg members 70 and 72 without the need for another support or a base.

Subsequently, the bolt 65a and the nut 65b are loosened, the flange connection between the reduction gear 56 and the drive motor 66 is released, and the drive motor 66 is removed (FIG. 6C). At this time, since the flanges 64 and 66 are near the end of the lower frame 34, the bolts 65a and the nuts 65b can be easily loosened while the speed reducer 56 is fixed to the lower frame 34. Further, since the lower frame 34 is supported substantially horizontally, the operator can easily hold the bolt 6 in a comfortable posture.
5a and the nut 65b can be loosened, and the drive motor 66 can be loosened while being suspended by an auxiliary crane (not shown). After loosening, the drive motor 66 can be directly carried out horizontally by the auxiliary crane.

Thereafter, a new driving motor 66 is similarly carried in by the auxiliary crane, and the two flanges 64, 68 are aligned while being suspended horizontally by the auxiliary crane, the bolt 65a is inserted, and the nut 65b is screwed. And tighten. Since the flanges 64 and 68 can be aligned in a substantially horizontal state, the replacement operation can be easily performed.

Next, the intermediate frame 40 is attached to the lower frame 34 by bolts 109 and 114, and the upper frame 38 is connected to the pins 102 and 1 in the reverse order to the above.
Attach to the intermediate frame 40 with 04. Then, the frame 12 is lifted by the wire 24, and the guide gibs 14 to 17 are engaged with the guide rails 8 and 10, thereby completing the replacement.

As described above, the present invention is not limited to such embodiments at all, and can be implemented in various modes without departing from the gist of the present invention.

[0041]

As described in detail above, the auger screw driving device of the present invention releases the connection between the lower frame and the main frame, releases the flange connection between the speed reducer and the drive motor, and moves the speed reducer to the lower position. While fixed to the frame,
Since the drive motor can be removed, there is an effect that the drive motor can be easily replaced. In addition, by providing the leg members, the lower frame to which the speed reducer to which the drive motor is attached is fixed is supported in a substantially horizontal state, so that there is an effect that the replacement work becomes easier.

[Brief description of the drawings]

FIG. 1 is a front view of a construction machine using an auger screw driving device as one embodiment of the present invention.

FIG. 2 is an enlarged front view of the auger screw driving device of the present embodiment.

FIGS. 3A and 3B are detailed views of a lower frame to which the speed reducer of the embodiment is fixed, wherein FIG. 3A is a front view and FIG.

4A and 4B are detailed views of the intermediate frame of the present embodiment, wherein FIG. 4A is a front view, FIG. 4B is a side view, and FIG.

FIGS. 5A and 5B are detailed views of the upper frame of the present embodiment, wherein FIG. 5A is a front view thereof and FIG.

FIG. 6 is an explanatory diagram showing a procedure for replacing a drive motor of the auger screw drive device of the present embodiment.

FIG. 7 is an explanatory view showing a procedure for replacing a drive motor of a conventional auger screw drive device.

[Explanation of symbols]

1. Construction machine 2. Leader 8,
DESCRIPTION OF SYMBOLS 10 ... Guide rail 12 ... Frame 14-17 ... Guide give 20 ... Auger screw 22 ... Hanging sheave 34
... lower frame 36 ... main frame 38 ... upper frame 40
... Intermediate frames 56,200 ... Reducers 66,204 ... Drive motors 70,72 ... Leg members

Claims (2)

(57) [Claims] 1. A main body of a drive motor is flanged to a main body of a speed reducer to which an auger screw is connected, and a frame to which the main body of the speed reducer is fixed is slidable on a guide rail of a reader via a guide gib. An auger screw driving device that supports and raises and lowers the frame along the guide rails via a suspension sheave rotatably supported by the frame, and rotates and excavates the auger screw. A lower frame to which the main body of the speed reducer is fixed so that the flange connection can be removed and the drive motor can be removed, and a main frame that covers the drive motor protruding from the lower frame and rotatably supports the suspension sheave. The lower frame and the main frame are detachably connected to each other, and the lower frame is Auger screw drive device being characterized in that each arranging the Gaidogibu to said main frame and over arm. 2. The apparatus according to claim 1, wherein the lower frame includes a leg member for supporting the lower frame substantially horizontally when the reduction gear to which the drive motor is mounted is fixed and the guide gib is placed down. The auger screw drive device according to claim 1, wherein: