JP4030296B2 - Axle extension adapter - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an axle extension adapter used for improving the stability of a work machine.
[0002]
[Prior art]
7 to 11 show an example of a traveling device for a working machine such as a mobile crane, and this traveling device includes a car body 1 and a pair of left and right crawler frames 2.
[0003]
The car body 1 includes a swivel base 3 that supports an upper swivel body (not shown) having a cab and a machine room, and parallel to each other from the front and rear ends of the left and right sides of the swivel base 3 to the outside of the work implement. And an axle member 4 protruding in the direction.
[0004]
The crawler frame 2 is supported by a hollow frame main body 5 extending in the front-rear direction of the work machine, and a rear end portion (A side in FIG. 7) of the frame main body 5 and driven by a hydraulic motor (not shown). Sprocket 6, idler wheel 7 pivotally supported on the front end of frame body 5 (B side in FIG. 7), a plurality of lower rollers 8 pivotally supported on the lower side of frame body 5, and pivoted on the upper side of frame body 5 A plurality of supported upper rollers 9, a sprocket 6, a lower roller 8, an idler wheel 7, and an endless crawler shoe 10 wound around the upper roller 9, and when the hydraulic motor is operated, the sprocket 6 The crawler shoe 10 sent out by is guided by the upper roller 9, the idler wheel 7, and the lower roller 8 and circulates.
[0005]
The crawler frame 2 is attached to the left and right sides of the car body 1.
[0006]
Two hollow axle boxes 11 penetrating in the left-right direction and circumscribing the axle member 4 are provided in the middle part of the frame body 5 in the front-rear direction.
[0007]
A cylinder 12 is disposed below the swivel base 3.
[0008]
The cylinder 12 has a housing connected to the car body 1 and a piston rod connected to the frame body 5, and the distance between the left and right crawler frames 2 can be adjusted by expanding and contracting the cylinder 12. ing.
[0009]
Further, an axle extension adapter can be attached to the tip of the axle member 4.
[0010]
As shown in FIGS. 10 and 11, the axle extension adapter includes a base plate 14 fastened to the end face of the axle member 4 with four bolts 13, welded to the lower side of the base plate 14, and attached to the inner bottom surface of the axle box 11. It has a sliding plate 15 that can abut, and a reinforcing member 16 that is welded and fixed to both the upper surface of the sliding plate 15 and the surface of the substrate 14 on the side opposite to the axle member.
[0011]
If this axle extension adapter is attached to the end surface of each axle member 4 and the distance between the left and right crawler frames 2 is widened so that the inner bottom surface of the axle box 11 abuts against the sliding plate 15, the stability of the work machine can be improved. The improvement of the property is achieved.
[0012]
[Problems to be solved by the invention]
However, in the above-described conventional axle extension adapter, when attaching and detaching, it is necessary to work to fasten a large number of bolts 13 and to release the fastening of the bolts 13. Could not adjust.
[0013]
Further, if the axle extension adapter is left attached, the maximum size of the car body 1 becomes excessive, and transportation is restricted.
[0014]
The present invention has been made in view of the above-described circumstances, and an object thereof is to provide an axle extension adapter that can be easily attached and detached.
[0015]
[Means for Solving the Problems]
In order to achieve the above object, in the axle extension adapter of the present invention, an adapter body that can be inserted into the front end portion of the axle member of the car body from the outer side of the car body toward the center side, and extending in the front-rear direction of the car body; A pin capable of penetrating the axle member and the adapter body, a pressing member fixed to the adapter body so as to be able to contact the upper edge of the tip of the axle member from the outside of the car body, and an axle box of the crawler frame that circumscribes the axle member A sliding plate fixed to the adapter body so that it can come into contact with the inner bottom surface ,
The planar shape of the sliding plate is a shape in which the width gradually narrows from the middle part in the longitudinal direction toward the anti-axle member side and the tip becomes a semicircular shape, and the sliding plate has a semicircular shape due to the reaction force that the crawler frame receives from the ground. The pressure distribution is configured to be averaged .
[0016]
In the axle extension adapter of the present invention, the pin is passed through the axle member and the adapter body, the sliding plate to be in contact with the axle box is restrained by the axle member, and the pin is pulled out from the axle member and the adapter body. Release the restraint of the sliding plate on the axle member.
[0017]
The reaction force received from the ground by the crawler frame is transmitted to the axle member by the pin and the pressing member. Furthermore, the planar shape of the sliding plate is a shape in which the width gradually narrows from the middle part in the longitudinal direction toward the anti-axle member and the tip becomes a semicircular shape, so that the crawler frame receives the reaction force received from the ground. The pressure distribution of the sliding plate is averaged.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0019]
1 to 6 show an example of an embodiment of an axle extension adapter according to the present invention. In the drawings, the same reference numerals as those in FIGS. 7 to 9 denote the same components.
[0020]
This axle extension adapter includes a pin 18 that can penetrate the lower edge portion of the abdomen plate member 4a at the front end of each axle member 4 in the front-rear direction of the car body 1, and the front end of the axle member 4 at the outer side of the car body 1. Adapter body 17 that can be inserted toward the center side and pivotally supported by the pin 18, a pressing member 19 that is fixed to the adapter body 17, and a sliding plate 20.
[0021]
The adapter body 17 is arranged horizontally in the front-rear direction of the car body 1 and has two vertical members 21 that have a substantially triangular shape when viewed in the front-rear direction of the car body 1 and a horizontal that is welded and fixed to the lower sides of the front and rear vertical members 21. It comprises a member 22 and a stiffening member 23 that is interposed between both front and rear vertical members 21 and is welded and fixed to the opposite surface.
[0022]
A pin hole 24 through which the pin 18 can be inserted is formed in a portion of the vertical member 21 near the axle member 4, and a through hole 25 coaxial with the pin hole 24 is provided between the front and rear vertical members 21. The hollow member 26 which has has intervened.
[0023]
Further, a contact washer 21 a is fixed to the surface of each vertical member 21 on the side opposite to the hollow member so as to be coaxial with the pin hole 24, so that fitting and sliding with respect to the axle member 4 are considered.
[0024]
When the adapter main body 17 is mounted on the axle member 4, the horizontal member 22 abuts the end surface of the axle member 4 on the lower end edge of the axle member 4.
[0025]
The pressing member 19 is welded and fixed to the top of the vertical member 21, and comes into contact with the upper edge of the tip of the axle member 4 when the adapter body 17 is attached to the axle member 4.
[0026]
The sliding plate 20 is fixedly welded to the lower surface of the horizontal member 22 of the adapter body 17 so that when the axle box 11 of the crawler frame 2 is externally attached to the axle member 4, the sliding plate 20 comes into contact with the inner bottom surface thereof. .
[0027]
The planar shape of the sliding plate 20 gradually decreases in width from the longitudinal intermediate portion toward the tip (on the side opposite to the axle member), and the tip is semicircular.
[0028]
When the axle extension adapter is attached to the axle member 4, the adapter main body 17 in which the portion near the pin hole 24 of the vertical member 21 faces the center side of the car body 1 is inserted into the distal end portion of the axle member 4, and the axle member 4 and The pin 18 is inserted into the pin hole 24 of the adapter body 17.
[0029]
Next, when the cylinder 12 is extended to increase the distance between the left and right crawler frames 2, the sliding plate 20 of the adapter body 17 comes into contact with the inner bottom surface of the axle box 11.
[0030]
Thereby, the reaction force that the crawler frame 2 receives from the ground is transmitted to the axle member 4 via the pressing member 19 and the pin 18 of the adapter main body 17.
[0031]
When the axle extension adapter is removed from the axle member 4, the cylinder 12 is reduced to narrow the distance between the left and right crawler frames 2, and the pin 18 is pulled out from the axle member 4 and the adapter body 17, and the adapter body 17 with respect to the axle member 4. Release the restraint.
[0032]
As described above, in the axle extension adapter shown in FIGS. 1 to 6, the axle extension adapter can be easily attached and detached by inserting and removing one pin 18.
[0033]
Further, since the reaction force received by the crawler frame 2 is transmitted to the axle member 4 through the pressing member 19 and the pin 18, a large rigidity can be obtained with a simple structure.
[0034]
Further, since the sliding plate 20 of the adapter body 17 is formed in a tapered shape whose width gradually decreases toward the tip, it is possible to average the pressure distribution of the sliding plate 20 due to the reaction force that the crawler frame 2 receives from the ground. it can.
[0035]
It should be noted that the axle extension adapter of the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the present invention.
[0036]
【The invention's effect】
As described above, according to the axle extension adapter of the present invention, the following various excellent effects can be obtained.
[0037]
(1) A pin is passed through the axle member and the adapter main body, the sliding plate to be in contact with the axle box is restrained by the axle member, the pin is pulled out from the axle member and the adapter main body, and the sliding plate with respect to the axle member. Therefore, the adapter body can be easily attached and detached by inserting and removing one pin.
[0038]
(2) Since the reaction force received from the ground by the crawler frame is transmitted to the axle member by the pin and the pressing member, a large rigidity can be obtained with a simple structure. Furthermore, the planar shape of the sliding plate is a shape in which the width gradually narrows from the middle part in the longitudinal direction toward the anti-axle member and the tip becomes a semicircular shape, so that the crawler frame receives the reaction force received from the ground. It is possible to average the pressure distribution of the sliding plate.
[Brief description of the drawings]
FIG. 1 is a plan view showing a traveling device for a working machine equipped with an example of an embodiment of an axle extension adapter of the present invention.
FIG. 2 is a view taken in the direction of arrows II-II in FIG.
FIG. 3 is a side view of the axle extension adapter associated with FIG. 2;
4 is a view taken along arrow IV-IV in FIG. 3;
5 is a VV arrow view of FIG. 3;
6 is a view taken along arrow VI-VI in FIG. 2;
FIG. 7 is a plan view showing an example of a traveling device for a conventional working machine.
8 is a view taken along arrow VIII-VIII in FIG. 7;
FIG. 9 is a view taken along arrow IX-IX in FIG.
10 is an enlarged view of a portion A in FIG.
11 is a XI-XI arrow view of FIG.
[Explanation of symbols]
1 Car Body 2 Crawler Frame 4 Axle Member 11 Axle Box 17 Adapter Body 18 Pin 19 Pressing Member 20 Sliding Plate

Claims (1)

An adapter main body that can be inserted into the front end portion of the axle member of the car body from the outer side of the car body toward the center side, a pin that extends in the front-rear direction of the car body and that can pass through the axle member and the adapter main body, and the front end of the axle member A pressing member fixed to the adapter body so as to be able to come into contact with the upper edge from the outside of the car body, and a sliding member fixed to the adapter body so as to be able to come into contact with the inner bottom surface of the axle box of the crawler frame that circumscribes the axle member With a board ,
The planar shape of the sliding plate is a shape in which the width gradually narrows from the middle part in the longitudinal direction toward the anti-axle member side and the tip becomes a semicircular shape, and the sliding plate has a semicircular shape due to the reaction force that the crawler frame receives from the ground. Axle extension adapter, characterized by averaging pressure distribution .

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