JP6667796B2 - Adapter structure - Google Patents

Description

The present invention relates to an adapter structure for assisting an attachment / detachment operation of attaching / detaching a crawler frame to / from an axle protruding in a vehicle width direction of a car body of a construction machine.

  In a construction machine, when the crawler frame is expanded in the vehicle width direction, the length of the engagement engagement of the beam frame (axle) of the car body with the guide hole of the crawler frame is reduced. Therefore, stress concentration of the load acting on the car body occurs, and the guide hole of the crawler frame is deformed, so that the crawler frame may not be able to maintain its upright state.

  Therefore, a technique described in Patent Document 1 has been proposed. In Patent Literature 1, a guide block adapter having the same dimensions as the beam frame is attached to reduce the length of the beam frame (axle) in order to reduce the stress of the load acting on the car body when the vehicle width is expanded and adjusted. Is secured.

JP-A-7-138984

  When a crawler frame is mounted on an axle protruding from a car body of a construction machine, the crawler frame is positioned with respect to an askle while being hung by a crane. Since this positioning operation is relatively difficult, it takes time to mount the crawler frame.

  Accordingly, an object of the present invention is to provide an adapter structure that allows a crawler frame to be easily mounted on an axle protruding from a car body of a construction machine.

To achieve the above object, the present invention, the crawler construction machine comprising a lower traveling body comprising a Crawler frame attachment carbody and axle projecting in the vehicle width direction of the car body on the axle An adapter structure for assisting a mounting operation of mounting a frame on the axle, comprising: a connecting portion connected to a protruding end of the axle; and a mounting plane extending in the vehicle width direction from the connecting portion. And a mounting plane for temporarily mounting the crawler frame, which is inserted into an axle insertion hole formed in the crawler frame, and both end sides of the mounting plane extending in the vehicle width direction. At least partially has a tapered shape that tapers away from the protruding end toward the outside in the vehicle width direction.

  Here, it is preferable that the mounting plane is disposed substantially on the same plane as the upper surface of the axle.

  In addition, it is preferable that a width of an end side of the placement plane that is in contact with the protruding end is greater than or equal to a width of the protruding end.

  Further, the adapter structure further includes a reinforcing portion provided across the connecting portion and the mounting plane, and a lower surface of the reinforcing portion is viewed from a direction in which the crawler frame extends, from the protruding end. It is preferable that the reinforcing portion is inclined upward so that the reinforcing portion tapers toward the outside in the vehicle width direction.

  Further, the placing plane moves between a working position disposed substantially on the same plane as the upper surface of the axle and a retracted position disposed substantially parallel to and near the end surface of the protruding end. Preferably, it is configured to be possible.

  According to the present invention, when the crawler frame is mounted on the axle, once the crawler frame is placed on the adapter, the height position of the crawler frame is automatically determined. Further, since the mounting plane has a tapered shape, the insertion is smooth, and the mounting operation can be performed while the crawler frame faces the car body. Therefore, the crawler frame can be easily mounted on the axle protruding from the car body of the construction machine.

The figure which shows the hydraulic shovel by embodiment of this invention. FIG. 3 is a perspective view showing a lower traveling body excluding a crawler frame. FIG. 2 is a plan view showing a lower traveling body including a crawler frame. FIG. 4 is a view taken in the direction of the arrow IV in FIG. 3. FIG. The side view which shows the adapter of the state connected to the front-end | tip of an axle. FIG. 7 is a view taken in the direction of arrow VII in FIG. 6. The figure for explaining the adapter concerning a modification.

<1. Embodiment>
An adapter structure according to an embodiment of the present invention will be described with reference to FIGS. Hereinafter, a hydraulic excavator 1 shown in FIG. 1 will be exemplified as an example of a construction machine according to the present invention. In addition, in each drawing, the front-back direction and the left-right direction of the machine are appropriately defined as needed.

  As shown in FIG. 1, the hydraulic excavator 1 includes a crawler type lower traveling body 2 and an upper revolving superstructure 3. The upper revolving unit 3 is mounted on the lower traveling unit 2 and is capable of revolving around the vertical axis with respect to the lower traveling unit 2.

  As shown in FIGS. 2 to 4, the lower traveling body 2 includes a car body 4, an axle 5, an adapter 6, and left and right crawler frames 7.

  The car body 4 is a hollow frame structure having enhanced strength and rigidity. A turning bearing 41 is provided on the upper surface of the car body 4. The upper revolving unit 3 is rotatably supported on the car body 4 via the revolving bearing 41.

  A total of four axles 5 are provided, two on each of the front and rear sides, and project from the car body 4 in the vehicle width direction (lateral direction).

  The adapter 6 is a member connected to the tip of the axle 5 when the crawler frame 7 is detached. The adapter 6 is attached to the tip of the axle 5 and further extends from the tip of the axle 5 in the vehicle width direction. Therefore, the adapter 6 is also called an axle extension bracket or the like.

  The left and right crawler frames 7 are mounted on the axle 5 via the adapter 6 and support the car body 4. The left and right crawler frames 7 are long structures, and are installed substantially parallel to both sides of the car body 4 so as to extend in the front-rear direction.

  As shown in FIG. 3, the left and right crawler frames 7 are formed with two axle insertion holes 71 penetrating the left and right side surfaces in the vehicle width direction (left and right direction). The adapter 6 and the axle 5 are inserted into the axle insertion hole 71 when the crawler frame 7 is attached.

  Next, the adapter 6 connected to the tip of the axle 5 will be described in detail with reference to FIGS.

  As shown in FIGS. 5 to 7, the adapter 6 includes a connection plate 61, a mounting plate 63, and a reinforcing plate 65.

  The connection plate 61 is a flat plate that is connected in parallel to the end surface 51 of the protruding end of the axle 5. As shown in FIG. 6, the connection plate 61 is connected to the end surface 51 of the protruding side end of the axle 5 by a bolt (not shown) so that the upper end is located substantially at the same position as the upper surface 53 of the axle 5. This connection plate 61 is an example of a connection portion according to the present invention.

  The mounting plate 63 is a flat plate that is bent at a substantially right angle from the upper end of the connection plate 61 and extends in the vehicle width direction. The mounting plate 63 has a mounting plane 63S arranged on the same plane as the upper surface 53 of the axle 5. As shown in FIG. 7, the width of an end side of the mounting plate 63 on the side in contact with the end surface 51 of the axle 5 is configured to be substantially the same as the width of the upper surface 53 of the protruding end of the axle 5.

  As shown in FIGS. 5 and 7, both sides 631 of the mounting plate 63 (mounting plane 63S) extending in the vehicle width direction have a tapered shape that tapers away from the protruding end of the axle 5. are doing. Here, both end sides 631 are shaped such that they extend a predetermined distance while maintaining the same width as the end side of the mounting plate 63 that is in contact with the end surface 51 of the axle 5, and then taper.

  The reinforcing plate 65 is a plate-shaped member provided across the connection plate 61 and the mounting plate 63. Specifically, the reinforcing plate 65 is connected to the inner surface of the L-shaped cross section formed by the connecting plate 61 and the mounting plate 63 so as to be orthogonal to each other. By providing the reinforcing plate 65, the load (specifically, the weight when the crawler frame 7 is mounted) applied to the mounting plate 63 reduces the connection portion (L-shaped portion) between the connecting plate 61 and the mounting plate 63. It does not concentrate on the bent part) but is dispersed. The reinforcing plate 65 is an example of a reinforcing portion.

  As shown in FIG. 6, the lower side (lower surface) 65 </ b> L of the reinforcing plate 65 extends outward from the end surface 51 of the protruding end of the axle 5 in the vehicle width direction when viewed from the front-rear direction (extending direction of the crawler frame 7). The reinforcing plate 65 is inclined upward so that the reinforcing plate 65 tapers in the up-down direction as it goes away. More specifically, the reinforcing plate 65 has a vertical length on the side where the crawler frame 7 is inserted (outside in the vehicle width direction), and a vertical length on the side connected to the axle 5 (inside in the vehicle width direction). It has a shorter trapezoidal shape. That is, the reinforcing plate 65 is shaped so that the adapter 6 can be easily inserted into the axle insertion hole 71 of the crawler frame 7.

  When mounting the crawler frame 7 using the adapter 6 described above, first, the adapter 6 is connected to the end surface 51 of the protruding end of the axle 5 with a bolt. Next, the crawler frame 7 is suspended and moved by a crane, and is once mounted on the mounting plane 63S of the adapter 6. Thereafter, the crawler frame 7 is moved inward and attached to the axle 5. When the crawler frame 7 is mounted on the axle 5, the adapter 6 is removed.

  As described above, according to the present embodiment, when the crawler frame 7 is mounted on the axle 5, the crawler frame 7 can be once mounted on the mounting plane 63S of the adapter 6, so that the height position of the crawler frame 7 is automatically determined. Therefore, the operator only needs to adjust the position of the crawler frame 7 in the front-rear direction and adjust the twist when the crawler frame 7 is viewed from above. Further, since the mounting plane 63S has a tapered shape, it can be smoothly inserted into the axle insertion hole 71, and the mounting operation can be performed while the crawler frame 7 faces the car body 4. Therefore, the crawler frame 7 can be easily assembled to the axle 5 protruding from the car body 4 of the excavator 1.

  Further, according to the present embodiment, the adapter 6 is configured to be detachable from the end surface 51 of the protruding end of the axle 5. Therefore, by removing the adapter 6 after assembling the crawler frame 7, the adapter 6 does not protrude from the side of the crawler frame 7 to hinder work.

  Further, according to the present embodiment, the mounting plane 63S of the adapter 6 is arranged on the same plane as the upper surface 53 of the axle 5, and the mounting plate 63 has an edge on the side in contact with the end surface 51 of the axle 5. The width is substantially the same as the width of the upper surface 53 at the protruding end of the axle 5. Therefore, the axle insertion hole 71 of the crawler frame 7 does not need to be caught at the joint between the axle 5 and the adapter 6, and the crawler frame 7 can be inserted smoothly.

  Further, according to the present embodiment, both end sides 631 of the mounting plate 63 (mounting plane 63S) extending in the vehicle width direction have a tapered shape that tapers away from the protruding end of the axle 5. I have. That is, both end sides 631 function as guide surfaces for guiding insertion into the axle insertion hole 71. Therefore, it is easy to insert the adapter 6 into the axle insertion hole 71 of the crawler frame 7.

<2. Modification>
The adapter structure according to the present invention is not limited to the embodiment described above, and various modifications and improvements are possible within the scope described in the claims.

  In the above-described embodiment, the case where the width of the side of the mounting plate 63 that is in contact with the end surface 51 is substantially the same as the width of the protruding side end of the axle 5 is not limited thereto. May be larger than the width of the protruding side end of the second member.

  Also in such a modification, when the crawler frame 7 is mounted, the axle insertion hole 71 of the crawler frame 7 does not catch on the joint between the axle 5 and the adapter 6, and the crawler frame 7 can be inserted smoothly.

  Further, in the above-described embodiment, the case where the mounting plane 63S of the adapter 6 is substantially horizontal has been exemplified, but the present invention is not limited to this. If the configuration is such that the adapter 6 is guided toward the upper surface 53 of the axle 5, the mounting plane 63S does not necessarily need to be horizontal, and may be slightly inclined up and down.

  Further, in the above embodiment, the case where the mounting plane 63S of the adapter 6 is arranged on the same plane as the upper surface 53 of the axle 5 is exemplified, but the present invention is not limited to this. The direction may be shifted (that is, a step may be generated).

  In the above-described embodiment, the reinforcing plate 65 is illustrated as an example of the reinforcing portion provided across the connecting portion (the connecting plate 61) and the mounting plane (the mounting plate 63). However, the present invention is not limited to such a configuration. . For example, a plurality of reinforcing plates may be provided, or the entire adapter may be formed of a block (block-shaped) member. Even in such a case, it is preferable that the lower surface of the adapter be inclined upward as the distance from the end surface 51 of the protruding end of the axle 5 to the outside in the vehicle width direction increases.

  Further, in the above embodiment, the case where the adapter 6 is connected to the end surface 51 of the protruding end of the axle 5 by a bolt has been exemplified. However, the present invention is not limited to this, and the foldable adapter 60 as shown in FIG. It may be installed at the tip of the axle 5.

  As shown in FIG. 8, the adapter 60 includes a rotating shaft 610, a mounting plate 630 that rotates about the rotating shaft 610, and a mounting plane of the mounting plate 630 that is flush with the upper surface 53 of the axle 5. And a support member 620 that supports the device in a state where it is disposed above. In such a modification, the mounting plate 630 has a work surface (top view in FIG. 8) where the mounting plane is disposed substantially on the same plane as the upper surface 53 of the axle 5 and the end surface 51 of the protruding end of the axle 5. It moves between the evacuation position (lower view in FIG. 8), which is disposed substantially parallel to and close to the evacuation position. According to such a modified example, unlike the above embodiment, the trouble of attaching and detaching the adapter 60 can be omitted.

  In the above embodiment, the case where the concept of the present invention is applied to the hydraulic excavator 1 is illustrated. However, the present invention is not limited to this, and may be applied to other construction machines such as a dismantling machine and a crane.

  As described above, the adapter structure according to the present invention is suitable for a hydraulic shovel or the like including a removable crawler frame.

DESCRIPTION OF SYMBOLS 1 Hydraulic excavator 2 Undercarriage 3 Upper revolving superstructure 4 Car body 5 Axle 6 Adapter 7 Crawler frame 41 Revolving bearing 51 End face 53 Upper surface 60 Adapter 61 Connection plate 63 Mounting plate 63S Mounting plane 65 Reinforcement plate 65L Lower side 71 of reinforcement plate Axle insertion hole 610 Rotating shaft 620 Support member 630 Mounting plate 631 Both ends

Claims (5)

To assist the mounting operation for mounting the crawler frame to the axle construction machine comprising a lower traveling body comprising a car body and an axle projecting from the vehicle width direction of the car body and capable crawler frame attached to the axle Adapter structure for
A connection portion connected to a protruding end of the axle;
A mounting plane extending from the connection portion in the vehicle width direction, the mounting plane being inserted into an axle insertion hole formed in the crawler frame, and temporarily mounting the crawler frame. ,
The adapter structure according to claim 1, wherein at least a part of both sides extending in the vehicle width direction of the mounting plane has a tapered shape tapering away from the protruding end toward the outside in the vehicle width direction.   The adapter structure according to claim 1, wherein the placement plane is disposed substantially on the same plane as an upper surface of the axle.   3. The adapter structure according to claim 1, wherein a width of an end side of the placement plane that is in contact with the protruding end is greater than or equal to a width of the protruding end. 4. The adapter structure further includes a reinforcing portion provided across the connecting portion and the mounting plane,
The lower surface of the reinforcing portion is inclined upward so that the reinforcing portion tapers away from the protruding end toward the outside in the vehicle width direction when viewed from the extending direction of the crawler frame. The adapter structure according to any one of claims 1 to 3, wherein   The mounting plane is movable between a working position disposed substantially on the same plane as an upper surface of the axle and a retracted position disposed substantially parallel to and close to an end surface of the protruding end. The adapter structure according to any one of claims 1 to 4, wherein the adapter structure is configured.

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