JP2015155230A - Base carrier of crawler type vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To devise an attachment structure of a translifter device to a truck frame and thereby prevent a transportation width of the truck frame from exceeding a vehicle width limit of a trailer.

SOLUTION: Recessed parts 17, which are recessed to the inner side relative to an upper surface plate 12a and a lower surface plate 12b of a truck frame 12, are respectively formed on side wall parts at both sides of a truck frame 12 in a fore and aft direction. A translifter device 30 supports the upper surface plate 12a of the truck frame 12 by inserting a support arm part 35, which extends from a lifter body part 31 to the truck frame 12 side, into the recessed part 17 of the truck frame 12. Each connection pin 40 is fitted into frame side pin holes 13 and a lifter side pin hole 37 to detachably attach the translifter device 30 to the truck frame 12.

COPYRIGHT: (C)2015,JPO&INPIT

Description

  The present invention relates to a lower traveling body of a crawler type vehicle.

  Conventionally, in crawler type vehicles such as hydraulic excavators and crawler cranes, the crawler width is expanded to increase stability during work, while the crawler width is reduced during transportation to accommodate trailer transport restrictions. Is known (see, for example, Patent Document 1).

  Specifically, side frames on the outer periphery of which crawlers are mounted are disposed on the left and right sides of the track frame of the crawler type vehicle. The left and right side frames are movable in the left-right direction between a crawler width expansion position where the left and right crawler intervals are maximum and a crawler width reduction position where the crawler intervals are minimum.

  By the way, when a truck frame is loaded on a trailer with a small load capacity and transported, even if the side frame is moved to the crawler width reduction position, the vehicle width limit of the trailer may be exceeded and the trailer may not be mounted. .

  In such a case, since the front and rear width of the track frame is narrower than the left and right width, the lower traveling body is lifted by the translifter device, the side frames are temporarily removed from the track frame, and the front and rear of the track frame are It is designed to be mounted on the trailer in the state of facing left and right.

  Here, the trans-lifter arm of the trans-lifter device is attached to the arm mounting bracket via arm mounting pins that are detachable with respect to the arm mounting brackets provided on both the front and rear sides of the track frame.

JP 2010-064595 A

  However, in conventional crawler type vehicles, mounting brackets for mounting the transformer lifter arms are provided on both the front and rear sides of the track frame (on the left and right sides when mounted on the trailer). It is the widest part of the transport width of the frame. For this reason, even if the side frame is removed from the truck frame, the transport width of the truck frame may exceed the vehicle width limit during trailer transport.

  The present invention has been made in view of the above points, and its purpose is to devise a structure for mounting the translifter device to the track frame so that the transport width of the track frame does not exceed the vehicle width limit of the trailer. There is to do.

  The present invention includes a track frame, and a pair of left and right side frames that are detachably attached to the left and right sides of the track frame with crawlers attached to the outer periphery, and lift the track frame to the front and rear sides of the track frame. For the lower traveling body of a crawler-type vehicle to which a pair of front and rear translifter devices can be attached and removed, the following solution was taken.

That is, according to the first aspect of the present invention, the side wall portions on both the front and rear sides of the track frame are formed with recessed portions that are recessed inwardly from the upper surface plate and the lower surface plate of the track frame,
The transformer lifter device supports the track frame by projecting a lifter main body, a lift cylinder for raising and lowering the lifter main body, and projecting from the lifter main body toward the track frame to be inserted into the recess. And a support arm portion that
A lifter side pin hole is formed at the tip of the support arm portion so as to penetrate in the vertical direction and into which the connecting pin is fitted,
The upper surface plate and the lower surface plate of the track frame are formed with frame side pin holes penetrating in the vertical direction corresponding to the lifter side pin holes and into which the connecting pins are fitted,
The translifter device and the track frame are detachably attached by inserting the support arm portion into the recess portion and fitting the connecting pin into the frame side pin hole and the lifter side pin hole. It is characterized by this.

  In the first invention, the support arm portion of the translifter device supports the upper surface plate of the track frame by being inserted into the recess portion of the track frame. The support arm and the upper and lower plates of the track frame are detachably attached by connecting pins.

  With such a configuration, when the translifter device is attached to the track frame, there is no need to project the mounting bracket from both the front and rear sides of the track frame as in the prior art. Thereby, since the widest part of the transport width of the track frame is the front-rear width of the track frame, the transport width of the track frame can be prevented from exceeding the vehicle width limit of the trailer.

  Further, by adopting a structure in which the translifter device and the track frame are connected by the connecting pins, the attaching / detaching operation between the translifter device and the track frame can be easily performed.

According to a second invention, in the first invention,
The connection pin has an upper connection pin and a lower connection pin housed in the lifter side pin hole of the support arm portion,
The translifter device has a connecting cylinder that moves the upper connecting pin and the lower connecting pin in the vertical direction,
The upper connecting pin and the lower connecting pin are fitted into the frame-side pin holes of the upper surface plate and the lower surface plate, respectively, by projecting tip portions thereof in the vertical direction by the connecting cylinder. It is what.

  In the second aspect of the present invention, the upper connection pin and the lower connection pin, which are housed in the lifter side pin holes of the support arm portion, are protruded in the vertical direction by the connection cylinder, respectively, so that the frame side pins of the upper surface plate and the lower surface plate It is inserted into each hole.

  With such a configuration, it is possible to easily attach and detach the translifter device and the track frame with the upper connection pin and the lower connection pin only by operating the connection cylinder.

  According to the present invention, when the translifter device is attached to the track frame, there is no need to project the mounting bracket from both the front and rear sides of the track frame as in the prior art. Thereby, since the widest part of the transport width of the track frame is the front-rear width of the track frame, the transport width of the track frame can be prevented from exceeding the vehicle width limit of the trailer.

  Further, by adopting a structure in which the translifter device and the track frame are connected by the connecting pins, the attaching / detaching operation between the translifter device and the track frame can be easily performed.

It is a top view which shows the structure of the lower traveling body of the crawler type vehicle which concerns on Embodiment 1 of this invention. It is a perspective view which shows the state before attaching a translifter apparatus to a track frame. It is a perspective view which shows the state which attached the translifter apparatus to the track frame. It is side surface sectional drawing which shows the state before connecting a translifter apparatus and a track frame with a connection pin. It is side surface sectional drawing which shows the state which connected the translifter apparatus and the track frame with the connection pin. In this Embodiment 2, it is side surface sectional drawing which shows the state before connecting a translifter apparatus and a track frame with a connection pin. It is side surface sectional drawing which shows the state which connected the translifter apparatus and the track frame with the connection pin.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. It should be noted that the following description of the preferred embodiment is merely illustrative in nature and is not intended to limit the present invention, its application, or its use. In each figure, the up / down and front / rear / left / right directions are indicated by arrows. Unless stated otherwise, the vertical direction will be described according to the directions indicated by these arrows.

Embodiment 1
FIG. 1 is a plan view showing a configuration of a lower traveling body of a crawler type vehicle. The crawler type vehicle 10 of the present embodiment is, for example, a dismantling machine, a hydraulic excavator, a crawler crane, or the like.

  As shown in FIG. 1, the lower traveling body 11 of the crawler type vehicle 10 includes a track frame 12 and a pair of left and right side frames 20. A bearing base 18 to which a swivel bearing (not shown) is fastened is provided at the center on the upper surface side of the track frame 12. The upper swing body (not shown) is slidably mounted on the lower traveling body 11 via a swing bearing.

  Axles 15 extend left and right on the front and rear sides of the track frame 12. The axle 15 is inserted into the axle insertion holes 20 a of the left and right side frames 20. A crawler 21 is mounted on the outer periphery of the left and right side frames 20.

  The left and right side frames 20 are provided so as to be movable in the left-right direction between a crawler width expansion position where the left and right crawler intervals are maximum and a crawler width reduction position where the crawler intervals are minimum. The left and right side frames 20 are expanded and contracted by a hydraulic cylinder 19 provided in the lower traveling body 11. The left and right side frames 20 are connected to the track frame 12 by connecting links (not shown) at the crawler width extended position and the crawler width reduced position, respectively.

  The left and right side frames 20 are detachably attached to the track frame 12. Here, when performing the operation of detaching the side frame 20 from the track frame 12, it is necessary to lift the entire lower traveling body 11 by the translifter device 30. Hereinafter, the mounting structure of the translifter device 30 to the track frame 12 will be described.

  As shown in FIGS. 2 and 3, the side wall portions on the front and rear sides of the track frame 12 are provided with recessed portions 17 that are recessed inwardly of the upper surface plate 12 a and the lower surface plate 12 b of the track frame 12. Two frame-side pin holes 13 are formed at positions facing the recess 17 in the upper surface plate 12a and the lower surface plate 12b with a space in the left-right direction.

  As shown in FIG. 4, the connecting pin 40 is fitted into the frame side pin hole 13. A cylindrical frame-side tube portion 14 is provided at the peripheral edge of the frame-side pin hole 13 on the upper surface of the upper surface plate 12a. A through-hole 14 a that penetrates in the radial direction is formed in the frame-side cylinder portion 14.

  As shown in FIGS. 2 and 3, a pair of front and rear translifter devices 30 for lifting the track frame 12 are disposed on both front and rear sides of the track frame 12. The transformer lifter device 30 includes a lifter body 31, a lift cylinder 32, and a support arm 35 that protrudes from the lifter body 31 toward the track frame 12.

  The lifter main body 31 extends in the left-right direction along the track frame 12, and cylinder brackets 33 that hold a lift cylinder 32 are attached to the left and right ends thereof. The lift cylinder 32 moves the lifter main body 31 up and down as the cylinder rod 32a moves back and forth in the vertical direction.

  The support arm portion 35 is integrally extended toward the track frame 12 from the central portion in the left-right direction of the lifter main body portion 31, and is inserted into the recess portion 17 of the track frame 12 so that the upper surface plate 12 a of the track frame 12 is attached. To support.

  Two lifter side pin holes 37 penetrating in the vertical direction corresponding to the frame side pin holes 13 of the track frame 12 are formed at the distal end portion of the support arm portion 35. Specifically, a cylindrical body 36 extending in the vertical direction is embedded in the tip end portion of the support arm portion 35, and a lifter side pin hole 37 is formed by a cylindrical hole of the cylindrical body 36.

  As shown in FIGS. 4 and 5, the translifter device 30 and the track frame 12 are configured such that the support arm portion 35 is inserted into the recess portion 17 and the connecting pin 40 is fitted into the frame side pin hole 13 and the lifter side pin hole 37. So that it is detachable.

  Specifically, the connecting pin 40 has a pin shaft portion 41 and a head portion 42. The pin shaft portion 41 is formed with a shaft diameter that can be fitted into the frame side pin hole 13 of the track frame 12 and the lifter side pin hole 37 of the transformer lifter device 30. The pin shaft portion 41 is set to such a length that the lower end portion does not protrude from the lower surface of the lower surface plate 12 b of the track frame 12 when fitted into the frame side pin hole 13 and the lifter side pin hole 37.

  The head portion 42 is formed with a diameter that is larger than the pin shaft portion 41 and that can be fitted into the frame-side cylinder portion 14. The head portion 42 is formed with a head hole 42 a penetrating in the radial direction corresponding to the through hole 14 a of the frame side cylinder portion 14.

  A fastening bolt 45 is inserted into the through hole 14 a of the frame side cylinder portion 14 and the head hole 42 a of the connecting pin 40, and the screw portion at the tip protrudes from the frame side cylinder portion 14. Then, by fastening the fastening nut 46 to the threaded portion of the fastening bolt 45, the connecting pin 40 is fixed so as not to come off in the axial direction. Thereby, the translifter device 30 is detachably attached to the track frame 12.

  Here, the upper surface plate 12 a of the track frame 12 is supported by the support arm portion 35 of the translifter device 30. Therefore, when the cylinder rod 32 a of the lift cylinder 32 is extended, the track frame 12 can be lifted together with the lifter body 31 and the support arm 35.

  As described above, according to the lower traveling body 11 of the crawler type vehicle 10 according to the first embodiment, when the translifter device 30 is attached to the track frame 12, the mounting brackets are attached from both the front and rear sides of the track frame 12 as in the past. There is no need to overhang. Thereby, since the widest part of the transport width of the track frame 12 is the front-rear width of the track frame 12, the transport width of the track frame 12 can be prevented from exceeding the vehicle width limit of the trailer.

  Further, by adopting a structure in which the translifter device 30 and the track frame 12 are connected by the connecting pin 40, the attaching / detaching operation of the translifter device 30 and the track frame 12 can be easily performed.

<< Embodiment 2 >>
FIG. 6 is a side cross-sectional view showing a state before the translifter device and the track frame are connected by the connecting pins in the second embodiment. Hereinafter, the same portions as those in the first embodiment are denoted by the same reference numerals, and only differences will be described.

  The connecting pin 40 has an upper connecting pin 40a and a lower connecting pin 40b. The upper connection pin 40 a and the lower connection pin 40 b are respectively accommodated in the lifter side pin holes 37 of the support arm portion 35.

  The translifter device 30 includes a connecting cylinder 43 that moves the upper connecting pin 40a and the lower connecting pin 40b in the vertical direction. Specifically, the connecting cylinder 43 is housed between the upper connecting pin 40 a and the lower connecting pin 40 b in the lifter side pin hole 37.

  The distal end portion of the upper cylinder rod 43a of the connecting cylinder 43 is connected to the proximal end portion of the upper connecting pin 40a. The distal end portion of the lower cylinder rod 43b of the connecting cylinder 43 is connected to the proximal end portion of the lower connecting pin 40b.

  As shown in FIG. 7, when the connecting cylinder 43 is operated, the upper cylinder rod 43a and the lower cylinder rod 43b extend in the vertical direction. As a result, the tip of the upper connecting pin 40a is fitted into the frame-side pin hole 13 of the upper surface plate 12a of the track frame 12, while the tip of the lower connecting pin 40b is fitted into the frame-side pin hole 13 of the lower surface plate 12b. .

  With such a configuration, it is possible to easily attach and detach the translifter device 30 and the track frame 12 by the upper connecting pin 40a and the lower connecting pin 40b only by operating the connecting cylinder 43.

  As described above, the present invention is highly practical in that the transport width of the track frame can be prevented from exceeding the vehicle width limit of the trailer by devising the mounting structure of the translifter device to the track frame. Since the effect is obtained, it is extremely useful and has high industrial applicability.

DESCRIPTION OF SYMBOLS 10 Crawler type vehicle 11 Lower traveling body 12 Track frame 12a Upper surface board 12b Lower surface board 13 Frame side pin hole 17 Recessed part 20 Side frame 21 Crawler 30 Translifter device 31 Lifter main body part 32 Lift cylinder 35 Support arm part 37 Lifter side pin hole 40 connecting pin 40a upper connecting pin 40b lower connecting pin 43 connecting cylinder

Claims (2)

A track frame and a pair of left and right side frames that are detachably attached to the left and right sides of the track frame with crawlers attached to the outer periphery, and a pair of front and rear for lifting the track frame on both the front and rear sides of the track frame A lower traveling body of a crawler type vehicle to which the translifter device of the above can be attached and detached,
On the side wall portions on the front and rear sides of the track frame, recessed portions that are recessed inwardly from the upper surface plate and the lower surface plate of the track frame are formed,
The transformer lifter device supports the track frame by projecting a lifter main body, a lift cylinder for raising and lowering the lifter main body, and projecting from the lifter main body toward the track frame to be inserted into the recess. And a support arm portion that
A lifter side pin hole is formed at the tip of the support arm portion so as to penetrate in the vertical direction and into which the connecting pin is fitted,
The upper surface plate and the lower surface plate of the track frame are formed with frame side pin holes penetrating in the vertical direction corresponding to the lifter side pin holes and into which the connecting pins are fitted,
The translifter device and the track frame are detachably attached by inserting the support arm portion into the recess portion and fitting the connecting pin into the frame side pin hole and the lifter side pin hole. A lower traveling body of a crawler type vehicle characterized by the above. In claim 1,
The connection pin has an upper connection pin and a lower connection pin housed in the lifter side pin hole of the support arm portion,
The translifter device has a connecting cylinder that moves the upper connecting pin and the lower connecting pin in the vertical direction,
The upper connecting pin and the lower connecting pin are fitted into the frame-side pin holes of the upper surface plate and the lower surface plate, respectively, by projecting tip portions thereof in the vertical direction by the connecting cylinder. A lower traveling body of a crawler type vehicle.

Images