JP2014073794A - Lower traveling body of construction machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify connection work, replacement work, inspection work and maintenance work of a pipe, while preventing damage of the pipe, in a lower traveling body of a construction machine.SOLUTION: A lower traveling body 1 comprises a pair of axles 14 separately arranged in front and in rear of a turning body support part 12, a pair of crawler devices 6 separately arranged on both sides of the turning body support part 12, extending so as to project to the front and rear of the pair of axles 14 and supported by the pair of axles 14 so as to be movable in the width direction of the lower traveling body 1, a flexible hydraulic pipe 8 for supplying hydraulic pressure to the respective crawler devices 6 and a regulating member 9 for regulating the movement of the hydraulic pipe 8. The hydraulic pipe 8 extends to the turning body support part 12 by passing through on the rear side axle 14 from a rear end part of the respective crawler devices 6, and the regulating member 9 is provided on an upper surface of the rear side axle 14, and limits a moving range of the hydraulic pipe 8 to a specific range in response to the fact that the respective crawler devices 6 move in the width direction of the lower traveling body 1.

Description

  The present invention relates to a lower traveling body of a construction machine.

  2. Description of the Related Art Conventionally, a lower traveling body of a construction machine that is mounted so that the upper revolving body of a construction machine can turn around a vertical axis is known, and Patent Document 1 shown below shows an example of the lower traveling body. ing.

  The lower traveling body shown in Patent Document 1 below includes a lower frame (car body) and a pair of left and right crawler devices. The lower frame includes a revolving body support portion that supports the upper revolving body from below, and a pair of axles that are arranged separately at the front and rear of the revolving body support portion and extend in the width direction of the lower traveling body. Each of the left and right crawler devices has a crawler frame, a crawler attached around the crawler frame, and a drive mechanism for rotating the crawler. The pair of axles extends so as to penetrate the left and right crawler frames, and each crawler device is movable along the axle. Further, the drive mechanism of each crawler device includes a motor as a drive source for rotating the crawler, and this motor is provided at the rear end of the crawler frame. And the hydraulic pipe (hose) which connects the hydraulic pump and tank installed in the upper revolving structure and the motor of each crawler device is provided in the lower frame.

  The hydraulic pipe extends downward from the swing body support portion and is disposed so as to extend to the crawler device along the lower surface of the swing body support portion and the axle. A piping duct is attached in a range from the lower surface of the revolving support unit to the lower surface of each axle, and the hydraulic piping is accommodated in the piping duct.

JP 2006-69492 A

  In the configuration of the conventional undercarriage described above, since the hydraulic piping extends through the lower frame revolving support section and the lower side of the axle and is accommodated in the piping duct, the crawler device extends along the axle. Even if the hydraulic piping shakes when moving, the hydraulic piping may be caught by various protrusions such as a bracket for a translifter and a car body weight bracket that are generally provided on the axle, and the protrusion and crawler device There is an advantage that it is possible to prevent the hydraulic piping from being damaged by being sandwiched between them. However, in the above configuration, another problem arises that the connecting work, exchanging work, inspection work, and maintenance work of the hydraulic piping become complicated. The reason is as follows.

  In the above configuration, since the hydraulic piping extends through the lower frame revolving unit support and the lower side of the axle and is accommodated in the piping duct, the hydraulic piping connection work, replacement work or maintenance work is performed. It is necessary to go under the lower frame, and it is necessary to introduce the hydraulic piping into the piping duct and / or to take out the hydraulic piping from the piping duct, which is complicated. In addition, since the hydraulic piping is hidden under the revolving support and the axle and covered with the piping duct, it is difficult to see from the outside. It is necessary to inspect and inspect, and the inspection work becomes complicated.

  The present invention has been made to solve the above-mentioned problems, and its purpose is to prevent the pipe from being damaged in the lower traveling body of the construction machine, and to connect, replace, inspect and maintain the pipe. Is to simplify.

  In order to achieve the above object, a lower traveling body of a construction machine according to the present invention is a lower traveling body of a construction machine that is mounted so that the upper revolving body can freely turn, and supports the upper revolving body from below. A lower frame having a revolving body support portion, a pair of axles arranged separately on the front and rear of the revolving body support portion, attached to the revolving body support portion and extending in a width direction of the lower traveling body, and the lower portion The pair of axles are arranged separately on both sides of the revolving support part in the width direction of the traveling body, extend so as to protrude forward and backward of the pair of axles, and are movable in the width direction of the lower traveling body. A pair of crawler apparatuses supported by the apparatus, a flexible pipe for supplying hydraulic pressure to each of the crawler apparatuses, and a movement for regulating the movement of the pipes as the crawler apparatuses move. A restriction member, and the piping is provided to extend from at least one of the front end portion and the rear end portion of each crawler device to the revolving body support portion through the corresponding axle, and the restriction member Is provided on the upper surface of the axle on the side of the pair of axles where the piping is arranged, and the piping moves when the crawler device moves in the width direction of the lower traveling body. The range of movement of is limited (Claim 1).

  In the lower traveling body of this construction machine, since the piping is provided so as to extend over the axle to the revolving support section, the pipe is connected to the piping from the outside of the lower traveling body during pipe connection work, replacement work, and maintenance work. In addition to being easily accessible, it is not necessary to introduce the pipe into the pipe duct and / or to remove the pipe from the pipe duct as in the prior art. For this reason, piping connection work, exchange work, and maintenance work can be simplified. In addition, since the piping can be easily seen from the outside of the lower traveling body, the inspection work of the piping can be simplified. Further, in the lower traveling body of this construction machine, the restriction member provided on the upper surface of the axle restricts the range of movement of the pipe to a specific range when the pipe moves along with the movement of the crawler device. Compared to the case of free movement, it is possible to effectively avoid the situation where the pipe is caught by the projection provided on the axle or the pipe is caught between the projection and the crawler device. Can prevent damage. Therefore, in the lower traveling body of the construction machine, the pipe connection work, the exchange work, the inspection work, and the maintenance work can be simplified while preventing damage to the pipe.

  The lower traveling body of the construction machine further includes a plurality of translifters for lifting the lower frame with respect to the ground, and the lower frame is provided on each axle and is used for a translifter for attaching the translifter The bracket for the translifter, and the pivoting of the axle at a position inside the axle when the crawler device is disposed at the innermost position in the width direction of the lower traveling body. The restricting member protrudes from an edge opposite to the body support portion, and is disposed at a position on the revolving body support portion side of the transformer lifter bracket on the axle on the side where the pipe is disposed. The pipe moves downward at a height position away from the height position of the bracket for A lower regulating portion that comes into contact with the pipe from below so as to inhibit, and the pipe that extends upward from the lower regulating portion and prevents the pipe from moving inward in the width direction of the lower traveling body. And an inner regulating portion that contacts from the inner side in the width direction (Claim 2).

  According to this configuration, the inner restricting portion and the lower restricting portion prevent the pipe from moving downward inward in the width direction along with the movement of the crawler device inward in the width direction of the lower traveling body. As a result, it is possible to prevent the pipe from being caught on the inner edge of the transformer lifter bracket. For this reason, after that, when the crawler device moves outward in the width direction of the lower traveling body, it is possible to prevent the pipe from being damaged by the inner edge of the transformer lifter bracket.

  In this case, the restricting member is disposed at a position away from the lower restricting portion to the upper side and is attached to the inner restricting portion, and the pipe is prevented from moving upward so as to prevent the pipe from moving upward. It is preferable to have an upper restricting portion in contact (claim 3).

  According to this configuration, the upper restricting portion can prevent the pipe from rising and getting over the inner restricting portion. For this reason, it can prevent more reliably that piping is caught in the inner edge of the bracket for transformer lifters.

  In the configuration in which the restriction member includes a lower restriction part and an inner restriction part, the restriction member extends upward from the lower restriction part at a position away from the inner restriction part to the outside in the width direction of the lower traveling body, You may have the outer side control part which contacts the said piping from the said width direction outer side so that the said piping may prevent moving to the width direction outer side of the said lower traveling body (Claim 4).

  According to this configuration, in addition to being able to prevent the pipe from being caught and damaged by the inner end edge of the transformer lifter bracket as described above, the inner restricting portion and the lower restricting portion can prevent the piping of the lower traveling body. With the movement of the crawler device outward in the width direction, the piping can be prevented from falling downward by its own weight while moving outward in the width direction by the outer restricting portion and the lower restricting portion. When moving to the inner side in the width direction of the lower traveling body, it is possible to prevent the pipe from being pinched between the outer edge of the transformer lifter bracket and the crawler device and being damaged.

  In this case, the restricting member is disposed at a position away from the lower restricting portion to the upper side and is installed between the inner restricting portion and the outer restricting portion to prevent the pipe from moving upward. It is preferable to have an upper restricting portion that comes into contact with the pipe from above (claim 5).

  According to this configuration, the upper restriction portion can prevent the piping from floating over the inner restriction portion or the outer restriction portion. For this reason, it is possible to more reliably prevent the pipe from being caught on the inner edge of the transformer lifter bracket or being sandwiched between the outer edge of the transformer lifter bracket and the crawler device.

  In the configuration in which the restricting member includes an inner restricting portion and an outer restricting portion, the inner restricting portion is disposed at an inner position than an inner edge of the transformer lifter bracket in the width direction of the lower traveling body, It is preferable that the outer side regulation part is arrange | positioned in the position of the outer side rather than the outer edge of the said bracket for transformer lifters in the width direction of the said lower traveling body.

  According to this configuration, it is possible to ensure a relatively large movement range of the pipe in the width direction of the lower traveling body. For this reason, when the crawler device moves in the width direction of the lower traveling body, it is possible to prevent a large bending deformation from being applied to the pipe, and it is possible to suppress damage to the pipe due to such a bending deformation. .

  In the configuration in which the restriction member has an inner restriction portion and an upper restriction portion, the restriction member further includes a plurality of car body weights for stabilizing the lower traveling body, and the lower frame is provided on each axle, and the car body weight A car body weight bracket for attaching the car body weight bracket to the upper side from the upper surface of the axle at a position on the inner side in the width direction of the lower traveling body with respect to the bracket for the translifter in each axle. The restriction member may be provided so as to protrude, and may be disposed at a position outside the car body weight bracket in the width direction of the lower traveling body.

  According to this configuration, the inner restriction portion and the upper restriction portion of the restriction member prevent the pipe from floating while moving inward in the width direction as the crawler device moves inward in the width direction of the lower traveling body, It is possible to prevent the pipe from getting over the car body weight bracket located further inside the inner regulating portion in the width direction of the lower traveling body. For this reason, after that, when the crawler device moves outward in the width direction of the lower traveling body, it is possible to prevent the piping from being caught by the car body weight bracket and being damaged.

  In the configuration provided with a regulating member for regulating the movement of the pipe accompanying the movement of the crawler device in the width direction of the lower traveling body, further comprising a plurality of translifters for lifting the lower frame with respect to the ground, The lower frame is provided on each axle, and includes a transformer lifter bracket for attaching the transformer lifter. The transformer lifter bracket includes a crawler device in the width direction of the lower traveling body in each axle. At the position inside the innermost position of the axle, the axle protrudes from the end of the axle opposite to the revolving support section, and the restricting member is located on the axle on the side where the piping is arranged. The transformer lifter bracket is disposed at a position on the revolving support section side of the transformer lifter bracket. A lower restricting portion that comes into contact with the pipe from the lower side so as to prevent the pipe from moving downward at a height position away from the height position of the G, and extends upward from the lower restricting portion. The pipe may further include an outer regulation portion that contacts the pipe from the outer side in the width direction so as to prevent the pipe from moving to the outer side in the width direction of the lower traveling body (Claim 8).

  According to this configuration, the outer restricting portion and the lower restricting portion prevent the pipe from moving downward in the width direction along with the movement of the crawler device to the outer side in the width direction of the lower traveling body and falling downward due to its own weight. As a result, the piping can be prevented from being disposed between the outer edge of the transformer lifter bracket and the crawler device. For this reason, after that, when the crawler device moves inward in the width direction of the lower traveling body, it is possible to prevent the pipe from being sandwiched between the outer edge of the transformer lifter bracket and the crawler device and being damaged. .

  In this case, the restricting member is disposed at a position away from the lower restricting portion and attached to the outer restricting portion, and the pipe is prevented from moving upward so as to prevent the pipe from moving upward. It is preferable to have an upper restricting portion in contact (claim 9).

  According to this configuration, the upper restriction portion can prevent the pipe from floating and overcoming the outer restriction portion. For this reason, it can prevent more reliably that piping is pinched between the outer edge of the bracket for translifters, and a crawler device.

  In the configuration including a regulating member for regulating the movement of the pipe accompanying the movement of the crawler device in the width direction of the lower traveling body, the vehicle further comprises a plurality of car body weights for stabilizing the lower traveling body, The lower frame is provided on each axle, and includes a car body weight bracket for attaching the car body weight. The car body weight bracket is configured such that the crawler device of the axle is connected to the lower traveling body. It is provided so as to protrude upward from the upper surface of the axle at a position inside the innermost position in the width direction, and the restricting member is provided on the axle on the side where the pipe is disposed. It is arranged at a position on the outer side in the width direction of the lower traveling body with respect to the car body weight bracket, and the pipe is An inner regulating portion that contacts the pipe from the inner side in the width direction so as to prevent the lower traveling body from moving inward in the width direction, and the inner regulating portion that is disposed at a position away from the upper surface of the axle. And an upper regulating portion that contacts the pipe from above so as to prevent the pipe from moving upward (Claim 10).

  According to this configuration, the inner restricting portion and the upper restricting portion prevent the pipe from moving upward while moving inward in the width direction along with the movement of the crawler device inward in the width direction of the lower traveling body. As a result, it is possible to prevent the pipe from getting over the car body weight bracket located further inside the inner regulating portion in the width direction of the lower traveling body. For this reason, after that, when the crawler device moves outward in the width direction of the lower traveling body, it is possible to prevent the piping from being caught by the car body weight bracket and being damaged.

  As described above, according to the present invention, it is possible to simplify pipe connection work, replacement work, inspection work, and maintenance work while preventing damage to the pipe in the lower traveling body of the construction machine.

1 is a schematic right side view of a crawler crane to which a lower traveling body according to an embodiment of the present invention is applied. It is a top view of the state which removed the crawler, the drive wheel, and the idler wheel of the lower traveling body by a 1st embodiment of the present invention. It is the figure which looked at the lower traveling body shown in Drawing 2 from back. FIG. 4 is an enlarged view of the vicinity of a right rear side regulating member showing a state in which the hydraulic piping of the lower traveling body shown in FIG. 3 is removed. FIG. 5 is a view corresponding to FIG. 4 for explaining a situation where the hydraulic piping is caught on the inner end edge of the transformer lifter bracket when no regulating member is provided. FIG. 5 is a view corresponding to FIG. 4 for explaining a situation in which hydraulic piping is sandwiched between an outer edge of a transformer lifter bracket and a crawler device when a regulating member is not provided. FIG. 5 is a view corresponding to FIG. 4 for explaining a situation in which hydraulic piping is caught on a car body weight bracket when a regulating member is not provided. It is a top view which shows partially the part from the rear-end part of the lower traveling body by the 2nd Embodiment of this invention to the intermediate part of the front-back direction. It is the figure which looked at the lower traveling body shown in Drawing 8 from back.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(First embodiment)
First, with reference to FIGS. 1-4, the lower traveling body 1 by 1st Embodiment of this invention is demonstrated.

  The lower traveling body 1 according to the first embodiment is applied to a crawler crane as shown in FIG. 1, and this crawler crane is an example of the construction machine of the present invention. The crawler crane includes an upper swing body 3 provided so that a hoisting member 2 for performing a lifting operation can freely hoist and the lower traveling body 1 according to the first embodiment. The upper turning body 3 is mounted on the lower traveling body 1 so as to be turnable around the vertical axis. The upper swing body 3 includes a hydraulic pressure supply device (not shown) such as a hydraulic pump.

  The lower traveling body 1 according to the first embodiment is a crawler type, and includes a lower frame 4 (see FIG. 2), a pair of crawler devices 6, a pair of hydraulic cylinders 7, a plurality of hydraulic pipes 8, and two The regulating member 9, four translifters (not shown), and a plurality of car body weights (not shown) are provided. In the following description, a side on which drive wheels 26 described later are disposed is referred to as a rear side, and a side on which idle wheels 28 described later are disposed is referred to as a front side. In the following description, the right side is the right side toward the front side, and the left side is the left side toward the front side.

  As shown in FIG. 2, the lower frame 4 includes a revolving support part 12, a pair of axles 14, four transformer lifter brackets 16 (hereinafter referred to as lifter brackets 16), and four car body weight brackets. 18 (hereinafter referred to as weight bracket 18).

  The revolving unit support 12 is located at the center of the lower frame 4 and supports the upper revolving unit 3 from below. The swivel support part 12 has an annular bearing support part 20. An unillustrated slewing bearing is attached to the bearing support 20 so as to be concentric, and the upper slewing body 3 is mounted on the slewing body support 12 via the slewing bearing so that the upper slewing body 3 can freely pivot. Piping through holes 22 (see FIG. 3) that penetrate the bearing support portion 20 in the radial direction are provided at predetermined positions on the left and right sides of the rear portion of the bearing support portion 20.

  The pair of axles 14 are arranged separately on the front and rear of the swing body support portion 12 and are attached to the swing body support portion 12. The pair of axles 14 supports the pair of crawler devices 6. Both axles 14 extend in the width direction (left-right direction) of the lower traveling body 1 so as to protrude from the left and right sides of the revolving support section 12. Each axle 14 is formed in an elongated box shape having a substantially rectangular cross section. The front axle 14 and the rear axle 14 are configured to be symmetrical with each other.

  The lifter brackets 16 are for attaching unillustrated transformer lifters for lifting the lower frame 4 with respect to the ground. Two lifter brackets 16 are provided on the front axle 14 and the rear axle 14, respectively. That is, a total of four transformer lifters are provided on each of the front side and the rear side of the lower frame 4, and when the crawler device 6 moves in the width direction of the lower traveling body 1 or when the crawler device 6 is attached to or detached from the axle 14. The lower frame 4 is lifted by these four transformer lifters.

  Each lifter bracket 16 is formed in a flat plate shape, and is arranged so that the upper surface thereof is flush with the axle 14 on which the lifter bracket 16 is provided. Projects from the edge. That is, the lifter bracket 16 provided on the front axle 14 protrudes forward from the front edge of the front axle 14, and the lifter bracket 16 provided on the rear axle 14 is connected to the rear axle 14. It protrudes rearward from the rear edge. The two lifter brackets 16 provided on the front axle 14 and the two lifter brackets 16 provided on the rear axle 14 are configured to be symmetrical in the front-rear direction. Therefore, the configuration of the two rear lifter brackets 16 will be described as a representative.

  The rear two lifter brackets 16 are arranged so as to be symmetrical with respect to the center line in the width direction of the lower frame 4. Hereinafter, the rear two lifter brackets 16 arranged on the right side are referred to as the right rear lifter bracket 16, and the left rear lifter bracket 16 is referred to as the left rear lifter bracket 16. The right rear lifter bracket 16 is an intermediate position between the center position in the width direction of the lower traveling body 1 and the right end of the rear axle 14, and the right crawler device 6 is the lowermost traveling body 1. It is arrange | positioned in the position which left | separated a little inside from the inner edge of the crawler apparatus 6 when arrange | positioning inside the width direction. The configuration of the left rear lifter bracket 16 is the same as the configuration of the right rear lifter bracket 16.

  The weight brackets 18 are for attaching unillustrated car body weights for stabilizing the lower traveling body 1, and two weight brackets 18 are provided on the front axle 14 and the rear axle 14, respectively. Two axles 14 provided on the front axle 14 are paired to support the front car body weight, and two axles 14 provided on the rear axle 14 are paired to form the rear car body weight. Support. The two weight brackets 18 provided on the front axle 14 and the two weight brackets 18 provided on the rear axle 14 are configured to be symmetrical in the front-rear direction. Therefore, hereinafter, the configuration of the two rear weight brackets 18 will be described as a representative.

  The two rear weight brackets 18 are each formed in a flat plate shape, and are arranged so as to be symmetrical with respect to the center line in the width direction of the lower traveling body 1 (lower frame 4). Hereinafter, the rear two weight brackets 18 arranged on the right side will be referred to as the right rear weight bracket 18, and the one arranged on the left side will be referred to as the left rear weight bracket 18. The right rear weight bracket 18 is positioned at the inner side in the width direction of the lower traveling body 1 than the lifter bracket 16 at the rear axle 14 and at the outer position from the center position in the width direction of the lower traveling body 1. Has been placed. The right rear weight bracket 18 is disposed so as to be perpendicular to the upper surface of the rear axle 14, protrudes upward from the upper surface of the axle 14, and extends from the rear edge of the axle 14 to the rear side. It is provided to protrude. The configuration of the right rear weight bracket 18 is the same as the configuration of the left rear weight bracket 18.

  The pair of crawler devices 6 bears the traveling function of the lower traveling body 1. The pair of crawler devices 6 are arranged separately on both sides of the swing body support portion 12 of the lower frame 4 in the width direction of the lower traveling body 1 and extend in the front-rear direction of the lower traveling body 1. In other words, the pair of crawler devices 6 is arranged separately on the left and right sides of the revolving support unit 12 and extends so as to protrude forward and backward of the pair of axles 14. Since the pair of crawler devices 6 is configured to be symmetrical, and the configuration is common, the configuration of the right crawler device 6 will be described as a representative.

  The crawler device 6 on the right side includes a crawler frame 24, a drive wheel 26 (see FIG. 1), an idle wheel 28 (see FIG. 1), a crawler 30 (see FIG. 1), and a crawler drive motor (not shown). Have.

  The crawler frame 24 extends in the front-rear direction, and an idler wheel 28 is provided at a front end portion thereof, and a drive wheel 26 is provided at a rear end portion thereof. The crawler 30 is mounted on the outer periphery of the crawler frame 24 via idle wheels 28 and drive wheels 26, and is rotated by the rotation of the drive wheels 26. An insertion hole 24a is provided at a position corresponding to each axle 14 in the crawler frame 24, and the axle 14 corresponding to each insertion hole 24a is inserted. Accordingly, the crawler frame 24 is supported by the pair of axles 14 so as to be movable along the axles 14 in the width direction of the lower traveling body 1.

  An unillustrated crawler driving motor is a hydraulic motor, and is for driving the driving wheel 26. That is, the crawler driving motor rotates the driving wheel 26 and thereby rotates the crawler 30 to cause the lower traveling body 1 to travel. The crawler driving motor is disposed at the rear end of the crawler device 6. Specifically, the crawler driving motor is provided at a position near the driving wheel 26 at the rear end of the crawler frame 24.

  The pair of hydraulic cylinders 7 are for moving the left and right crawler devices 6 in the width direction of the lower traveling body 1. Both hydraulic cylinders 7 are arranged between the front axle 14 and the rear axle 14. The pair of hydraulic cylinders 7 are arranged separately on the left and right. The right hydraulic cylinder 7 is installed between the revolving support unit 12 and the right crawler frame 24, moves the right crawler device 6 in the width direction of the lower traveling body 1, and the left hydraulic cylinder 7 The crawler device 6 on the left side is moved between the revolving unit support 12 and the left crawler frame 24 and moves in the width direction of the lower traveling unit 1.

  The hydraulic pipe 8 is for supplying hydraulic pressure to the crawler driving motor of each crawler device 6 from a hydraulic pressure supply device provided in the upper swing body 3. The hydraulic pipe 8 is composed of a flexible hydraulic hose. The lower traveling body 1 includes a plurality of right rear hydraulic pipes 8 that supply hydraulic pressure from the hydraulic supply device to the crawler driving motor of the right crawler device 6, and a crawler drive for the left crawler device 6 from the hydraulic supply device. A plurality of hydraulic pipes 8 on the left rear side for supplying hydraulic pressure to the motor are provided. The plurality of right rear hydraulic pipes 8 pass from the crawler driving motor at the rear end of the right crawler device 6 to the upper side of the rear axle 14 and pass through the right rear rear pipe through hole 22 of the revolving support part 12. It passes through the inside of the revolving support part 12 and is provided so as to reach the upper revolving body 3. The plurality of left rear hydraulic pipes 8 pass from the crawler driving motor at the rear end of the left crawler device 6 to the upper side of the rear axle 14 and pass through the left rear pipe through hole 22 of the swivel support 12. It passes through the inside of the revolving support part 12 and is provided so as to reach the upper revolving body 3. The plurality of hydraulic pipes 8 on the right rear side and the plurality of hydraulic pipes 8 on the left rear side are respectively bundled at predetermined positions. Both the right rear hydraulic pipe 8 and the left rear hydraulic pipe 8 have a slightly longer length even when the corresponding crawler device 6 is disposed at the outermost position in the width direction of the lower traveling body 1. have.

  The restricting member 9 is for restricting the movement of the hydraulic pipe 8 accompanying the movement of the crawler device 6 in the width direction of the lower traveling body 1. Specifically, the hydraulic pipe 8 moves such that the crawler device 6 swings or swells as the crawler device 6 moves in the width direction of the lower traveling body 1. The restricting member 9 is for limiting the range in which the hydraulic pipe 8 moves to a predetermined range. The two restricting members 9 are provided on the upper surface of the rear axle 14 and are arranged so as to be symmetrical with respect to the center line in the width direction of the lower frame 4. The right regulating member 9 regulates the movement of the plurality of hydraulic pipes 8 on the right rear side, and the left regulating member 9 regulates the movement of the plurality of hydraulic pipes 8 on the left rear side. The right-side regulating member 9 and the left-side regulating member 9 are configured to be bilaterally symmetric and have the same configuration. Therefore, the configuration of the right-side regulating member 9 will be described below as a representative.

  The right restricting member 9 is disposed on the rear axle 14 on the inner side of the right rear weight bracket 18 on the revolving body support portion 12 side (front side) of the right lifter bracket 16. It is arranged at a position between the left end edge of the crawler device 6 on the right side. As shown in FIG. 4, the right regulating member 9 includes two base portions 32, a lower regulating portion 34, an inner regulating portion 36, an outer regulating portion 38, and an upper regulating portion 40.

  The two base portions 32 are disposed at the lower portion of the restricting member 9 and are attached to the rear axle 14 so as to be detachable. Specifically, the two attachment blocks 14a are provided apart from each other in the area on the front side of the right rear lifter bracket 16 and on the right side of the right rear weight bracket 18 on the upper surface of the rear axle 14. Each mounting block 14a is formed with a bolt hole. The two base portions 32 are arranged at positions corresponding to the two mounting blocks 14a and installed on the mounting blocks 14a, and the lower ends of the base portions 32 are fastened to the corresponding mounting blocks 14a by bolts. Yes. Each base portion 32 extends upward from each mounting block 14a.

  The lower regulating portion 34 is configured so that the right rear hydraulic pipe 8 is located at a height position away from the height position of the right rear lifter bracket 16 (the height position of the upper surface of the rear axle 14). The hydraulic piping 8 is contacted from below so as to prevent the downward movement. The lower restricting portion 34 is disposed on the rear axle 14 at the front position of the right rear lifter bracket 16 and is attached to the upper ends of the two base portions 32. The lower restricting portion 34 is a linear member extending linearly, and is disposed in a range extending over both widthwise sides of the right rear lifter bracket 16. The lower restricting portion 34 extends in parallel to the upper surface of the rear axle 14 and extends obliquely so as to go slightly rearward as it goes to the right.

  The inner regulating portion 36 contacts the hydraulic pipe 8 from the inner side (left side) in the width direction so as to prevent the hydraulic pipe 8 on the right rear side from moving to the inner side (left side) in the width direction of the lower traveling body 1. It is. The inner regulating portion 36 is a linear member extending linearly, and is coupled to an inner end portion (left end portion) of the lower regulating portion 34 in the width direction of the lower traveling body 1 and extends upward from the end portion. ing. The inner regulating portion 36 is located on the inner side (left side) of the inner edge (left end edge) of the right rear lifter bracket 16 and on the right rear side of the weight bracket 18 on the right rear side in the width direction of the lower traveling body 1. It is arranged on the outside (right side) position.

  The outer regulating portion 38 comes into contact with the hydraulic pipe 8 from the outer side in the width direction (left side) so as to prevent the right rear hydraulic pipe 8 from moving to the outer side (right side) in the width direction of the lower traveling body 1. It is. The outer restricting portion 38 is a linear member extending linearly, and is coupled to an outer end portion (right end portion) of the lower restricting portion 34 in the width direction of the lower traveling body 1 and extends upward from the end portion. ing. The outer regulating portion 38 is outside (right side) of the outer edge (right end edge) of the right rear lifter bracket 16 in the width direction of the lower traveling body 1, and the right crawler device 6 is connected to the lower traveling body 1. It is arrange | positioned in the position inside the inner edge of the crawler apparatus 6 when arrange | positioning innermost in the width direction of this.

  The upper restricting portion 40 comes into contact with the hydraulic piping 8 from above so as to prevent the right rear hydraulic piping 8 from moving upward, and the upper restricting portion of the inner restricting portion 36 and the outer restricting portion 38 It is installed between the upper end. The upper restricting portion 40 is an elongated flat plate-like member and extends substantially parallel to the lower restricting portion 34. The upper restricting portion 40 is fastened to the inner restricting portion 36 and the outer restricting portion 38 by fastening the left end portion to the upper end portion of the inner restricting portion 36 and the right end portion to the upper end portion of the outer restricting portion 38 with bolts. It is attached so that it can be attached or detached.

  With the configuration of the restriction member 9 as described above, the right rear hydraulic pipe 8 is passed through a space surrounded by the lower restriction part 34, the inner restriction part 36, the outer restriction part 38 and the upper restriction part 40. The left and right movement range of the portion inserted into the space is limited to a range between the inner restriction portion 36 and the outer restriction portion 38, and the upper and lower movement range of the portion inserted into the space is the upper restriction portion 40. And the range between the lower regulating portion 34.

  In the first embodiment, since the hydraulic pipe 8 is provided so as to extend through the upper side of the rear axle 14 to the revolving support part 12, the hydraulic pipe 8 is connected, exchanged, and maintained. The hydraulic piping 8 can be easily accessed from the outside of the lower traveling body 1, and it is not necessary to introduce the hydraulic piping into the piping duct and / or to take out the hydraulic piping from the piping duct as in the prior art. For this reason, the connection work, replacement work, and maintenance work of the hydraulic piping 8 can be simplified. In addition, since the hydraulic pipe 8 can be easily seen from the outside of the lower traveling body 1, the inspection work of the hydraulic pipe 8 can be simplified.

  Moreover, in the first embodiment, the restriction member 9 provided on the upper surface of the rear axle 14 moves when the hydraulic pipe 8 moves as the crawler device 6 moves in the width direction of the lower traveling body 1. Since the range of movement of the hydraulic pipe 8 is limited, the hydraulic pipe 8 is caught on the lifter bracket 16 and the weight bracket 18 provided on the rear axle 14 as compared with the case where the hydraulic pipe 8 moves freely. The situation in which the hydraulic pipe 8 is sandwiched between the bracket 16 and the crawler device 6 can be effectively avoided, and as a result, the hydraulic pipe 8 can be prevented from being damaged.

  Specifically, when the restriction member 9 according to the first embodiment is not provided, when the crawler device 6 moves inward in the width direction of the lower traveling body 1, the hydraulic pipe 8 is accordingly moved in the width direction. While moving inward, it hangs down due to its own weight and may be caught on the inner edge of the lifter bracket 16 as shown in FIG. In this case, when the crawler device 6 moves outward in the width direction of the lower traveling body 1, the hydraulic pipe 8 is damaged by the inner edge of the lifter bracket 16. On the other hand, in the first embodiment, the inner regulating portion 36 and the lower regulating portion 34 of the regulating member 9 are connected to the hydraulic pipe 8 as the crawler device 6 moves inward in the width direction of the lower traveling body 1. The hydraulic pipe 8 can be prevented from being caught on the inner edge of the lifter bracket 16 because the hydraulic pipe 8 is prevented from falling downward due to its own weight while moving inward in the width direction. For this reason, it is possible to prevent the hydraulic pipe 8 from being damaged by the inner edge of the lifter bracket 16 when the crawler device 6 moves to the outside in the width direction of the lower traveling body 1 thereafter.

  When the crawler device 6 moves to the outside in the width direction of the lower traveling body 1 when the regulating member 9 is not provided, the hydraulic pipe 8 hangs downward by its own weight while moving to the outside in the width direction accordingly. Thereafter, when the crawler device 6 moves inward in the width direction of the lower traveling body 1, it is sandwiched between the outer edge of the lifter bracket 16 and the crawler frame 24 of the crawler device 6 as shown in FIG. There is a risk of damage. On the other hand, in the first embodiment, the outer restricting portion 38 and the lower restricting portion 34 of the restricting member 9 are connected to the hydraulic piping 8 as the crawler device 6 moves outward in the width direction of the lower traveling body 1. While moving outward in the width direction, it is prevented from falling downward due to its own weight. Therefore, after that, when the crawler device 6 moves inward in the width direction of the lower traveling body 1, the hydraulic pipe 8 is sandwiched between the outer edge of the lifter bracket 16 and the crawler device 6 and is damaged. Can be prevented.

  Further, when the crawler device 6 moves to the inner side in the width direction of the lower traveling body 1 when the regulating member 9 is not provided, as shown in FIG. You may get over. In this case, when the crawler device 6 moves outward in the width direction of the lower traveling body 1, the hydraulic pipe 8 may be caught by the weight bracket 18 and damaged. On the other hand, in the first embodiment, the inner restriction portion 36 and the upper restriction portion 40 of the restriction member 9 are connected to the hydraulic pipe 8 as the crawler device 6 moves inward in the width direction of the lower traveling body 1. Prevents floating upward while moving inward in the width direction. For this reason, the hydraulic pipe 8 is prevented from getting over the weight bracket 18, and thereafter, when the crawler device 6 moves outward in the width direction of the lower traveling body 1, the hydraulic pipe 8 is caught by the weight bracket 18 and damaged. Can be prevented.

  In the first embodiment, since the upper restricting portion 40 is constructed between the upper end portion of the inner restricting portion 36 and the upper end portion of the outer restricting portion 38, such an upper restricting portion 40 is provided. It is possible to reliably prevent the hydraulic pipe 8 from getting over the inner restricting portion 36 or the outer restricting portion 38 as compared with the case where there is not. Therefore, it is ensured that the hydraulic pipe 8 is caught on the inner edge of the lifter bracket 16 or the weight bracket 18 or is sandwiched between the outer edge of the lifter bracket 16 and the crawler device 6. Can be prevented.

  Further, in the first embodiment, the inner regulating portion 36 is disposed at a position inside the end edge inside the lifter bracket 16 in the width direction of the lower traveling body 1, and the outer regulating portion 38 is disposed on the lower traveling body. Since the movement of the hydraulic pipe 8 is restricted by the restricting member 9 because it is disposed at a position outside the outer edge of the lifter bracket 16 in the width direction 1, the width direction of the lower traveling body 1 A relatively large movement range of the hydraulic pipe 8 can be ensured. For this reason, when the crawler device 6 moves in the width direction of the lower traveling body 1, it is possible to prevent a large bending deformation from being applied to the hydraulic piping 8, and damage to the hydraulic piping 8 due to such bending deformation. Can be suppressed.

(Second Embodiment)
Next, with reference to FIG.8 and FIG.9, the structure of the lower traveling body 41 by 2nd Embodiment of this invention is demonstrated.

  The lower traveling body 41 according to the second embodiment includes two restriction members 49 having different configurations from the two restriction members 9 of the lower traveling body 1 according to the first embodiment.

  The two restricting members 49 in the second embodiment have the same shape and are arranged so as to be symmetrical with respect to the center line in the width direction of the lower frame 4. Since the configuration of the two regulating members 49 is common, the configuration of the right regulating member 49 will be described below as a representative.

  The right regulating member 49 is erected so as to protrude from the upper surface of the rear axle 14, and is disposed on the revolving body support portion 12 side (front side) of the right rear lifter bracket 16. The right restricting member 49 includes an inner restricting portion 52 and an upper restricting portion 54.

  The inner restricting portion 52 comes into contact with the hydraulic pipe 8 from the inner side in the width direction so as to prevent the plurality of right rear hydraulic pipes 8 from moving to the inner side (left side) in the width direction of the lower traveling body 1. is there. The inner restricting portion 52 is a rod-like member that linearly extends upward from the upper surface of the rear axle 14, and is outside (right side) of the right rear weight bracket 18 in the width direction of the lower traveling body 1. And it is arrange | positioned in the position of the outer side (right side) rather than the inner edge (left end edge) of the bracket 16 for right rear lifters.

  The upper restricting portion 54 comes into contact with the hydraulic pipe 8 from above so as to prevent the plurality of right rear hydraulic pipes 8 from moving upward, and is separated upward from the upper surface of the rear axle 14. It extends from the inner regulating portion 52 to the outer side in the width direction of the lower traveling body 1 at the position. Specifically, the upper restriction portion 54 is linearly inclined so as to go from the upper end portion of the inner restriction portion 52 toward the outer side (right side) in the width direction of the lower traveling body 1 toward the revolving body support portion 12 side (front side). It is a rod-like member that extends in a general manner. The upper restricting portion 54 is formed integrally with the inner restricting portion 52, and the inner restricting portion 52 and the upper restricting portion 54 are formed by bending one straight bar into an L shape.

  Other configurations of the lower traveling body 41 according to the second embodiment are the same as the configurations of the lower traveling body 1 according to the first embodiment.

  In the second embodiment, as in the first embodiment, the hydraulic pipe 8 extends through the upper side of the rear axle 14 to the swivel support 12 so that the crawler driving motor 6 is connected to the crawler driving motor. Connection work of the hydraulic piping 8, replacement work of the hydraulic piping 8, inspection work and maintenance work can be simplified.

  In the second embodiment, the inner restriction portion 52 and the upper restriction portion 54 of the restriction member 49 are connected to the inner side in the width direction of the hydraulic pipe 8 as the crawler device 6 moves inward in the width direction of the lower traveling body 1. To move upward while moving to. For this reason, it is possible to prevent the hydraulic pipe 8 from getting over the weight bracket 18 positioned on the inner side in the width direction of the lower traveling body 1 with respect to the inner regulating portion 52. For this reason, it is possible to prevent the hydraulic pipe 8 from being caught by the weight bracket 18 and being damaged when the crawler device 6 moves to the outside in the width direction of the lower traveling body 1.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is shown not by the above description of the embodiments but by the scope of claims for patent, and further includes meanings equivalent to the scope of claims for patent and all modifications within the scope.

  For example, in the above embodiment, the crawler driving motor is provided only at the rear end portions of the left and right crawler devices, but the crawler driving motor may be provided only at the front end portions of the left and right crawler devices. The crawler driving motors may be provided at both the front end portion and the rear end portion of the left and right crawler devices.

  When the crawler driving motor is provided only at the front end portions of the left and right crawler devices, the hydraulic piping and the regulating member provided on the rear side of the above embodiment may be applied to the front side. Further, when crawler driving motors are provided at both the front end and the rear end of the left and right crawler devices, in addition to the hydraulic piping and the regulating member provided on the rear side of the above embodiment, the same as that The hydraulic piping and the regulating member may be provided on the front side.

  In the first embodiment, the upper restricting portion may be omitted from the restricting member. Even in this case, if the height of the inner restricting portion is secured to some extent, the hydraulic piping can be prevented from getting over the inner restricting portion, and as a result, the hydraulic piping to the inner edge of the lifter bracket can be prevented. It is possible to prevent catching. Further, if the height of the outer restricting portion is ensured to some extent, the hydraulic piping can be prevented from getting over the outer restricting portion even if the upper restricting portion is not provided. It is possible to prevent the hydraulic piping from being caught between the outer edge and the crawler device.

  In the first embodiment, the outer restriction portion may be omitted from the restriction member. In this case, it becomes difficult to prevent the hydraulic pipe from being caught between the outer edge of the lifter bracket and the crawler device by the regulating member, but the hydraulic pipe is caught on the inner edge of the lifter bracket. And it is possible to prevent the hydraulic piping from being caught on the weight bracket.

  In the first embodiment, the upper restricting portion and the outer restricting portion may be omitted from the restricting member. In this case, it is difficult to prevent the hydraulic pipe from being caught between the outer edge of the lifter bracket and the crawler device and the hydraulic pipe from being caught by the weight bracket. It is possible to prevent the hydraulic pipe from being caught on the inner edge.

  Moreover, in the said 1st Embodiment, you may abbreviate | omit an inner side control part from a control member. In this case, it is difficult to prevent the hydraulic pipe from being caught on the inner edge of the lifter bracket by the restriction member, but at least the hydraulic pipe between the outer edge of the lifter bracket and the crawler device It is possible to prevent pinching.

  In the first embodiment, the upper restricting portion and the inner restricting portion may be omitted from the restricting member. In this case, it becomes difficult to prevent the hydraulic pipe from being caught on the inner edge of the lifter bracket and the hydraulic pipe from being caught on the weight bracket by the regulating member, but the outer edge of the lifter bracket and the crawler It is possible to prevent the hydraulic piping from being caught between the devices.

  Further, the upper restricting portion is not necessarily provided between the inner restricting portion and the outer restricting portion. In other words, the upper restricting portion may extend from the inner restricting portion to a predetermined position before the outer restricting portion, or may extend from the outer restricting portion to a predetermined position before the inner restricting portion.

  Moreover, in the said 1st Embodiment, the installation position of the inner side control part in the width direction of a lower traveling body may be a position outside the inner edge of the lifter bracket. Further, the installation position of the outer restricting portion in the width direction of the lower traveling body may be a position on the inner side of the outer edge of the lifter bracket.

  Moreover, in the said embodiment, although the crane as an example of the construction machine of this invention was mentioned as an example and demonstrated, it is not limited to this. For example, the present invention can be applied to excavators and other construction machines.

1, 41 Lower traveling body 3 Upper swing body 4 Lower frame 6 Crawler device 8 Hydraulic piping (piping)
9, 49 Restriction member 12 Revolving body support part 14 Axle 16 Translifter bracket 18 Car body weight bracket 34 Lower restriction part 36, 52 Inner restriction part 38 Outer restriction part 40, 54 Upper restriction part

Claims (10)

It is a lower traveling body of a construction machine that is mounted so that the upper revolving body can turn freely,
A revolving body support portion that supports the upper revolving body from below, and a pair of axles that are separately arranged before and after the revolving body support portion, are attached to the revolving body support portion, and extend in the width direction of the lower traveling body; A lower frame having
In the width direction of the lower traveling body, the pair is arranged separately on both sides of the revolving body support portion, extends so as to protrude forward and backward of the pair of axles, and is movable in the width direction of the lower traveling body. A pair of crawler devices supported by the axles;
Flexible piping for supplying hydraulic pressure to each of the crawler devices;
A regulating member for regulating the movement of the pipe accompanying the movement of each crawler device,
The pipe is provided so as to extend from at least one of the front end portion and the rear end portion of each of the crawler devices to the swivel support portion through the corresponding axle.
The restricting member is provided on an upper surface of an axle on the side where the pipe is disposed among the pair of axles, and the pipe moves as the crawler devices move in the width direction of the lower traveling body. The undercarriage of construction machinery that limits the range of movement of the piping. A plurality of translifters for lifting the lower frame relative to the ground;
The lower frame is provided on each axle, and includes a bracket for a translifter for attaching the translifter,
The translifter bracket is opposite to the revolving body support portion of the axle at a position on the inner side of the axle when the crawler device is disposed on the innermost side in the width direction of the lower traveling body. Protruding from the side edge,
The restricting member is disposed on the axle on the side where the piping is disposed, at a position on the revolving support portion side of the transformer lifter bracket, and is spaced apart from a height position of the transformer lifter bracket. A lower restricting portion that comes into contact with the pipe from below so as to prevent the pipe from moving downward at the vertical position, and extends upward from the lower restricting portion, and the pipe extends in the width direction of the lower traveling body. The lower traveling body of the construction machine according to claim 1, further comprising an inner regulation portion that contacts the pipe from the inner side in the width direction so as to prevent the inner pipe from moving inward.   The restricting member is disposed at a position away from the lower restricting portion to the upper side and attached to the inner restricting portion, and the upper restricting member that contacts the pipe from above so as to prevent the pipe from moving upward. The lower traveling body of the construction machine according to claim 2, comprising a portion.   The restricting member extends upward from the lower restricting portion at a position away from the inner restricting portion in the width direction outside of the lower traveling body, and prevents the pipe from moving outward in the width direction of the lower traveling body. The lower traveling body of the construction machine according to claim 2, further comprising an outer regulating portion that comes into contact with the pipe from the outside in the width direction.   The restricting member is disposed at a position away from the lower restricting portion to the upper side and is laid between the inner restricting portion and the outer restricting portion so as to prevent the pipe from moving upward. The lower traveling body of the construction machine according to claim 4, further comprising an upper restriction portion that contacts the pipe from above. The inner restricting portion is disposed at a position inside the inner edge of the transformer lifter bracket in the width direction of the lower traveling body,
6. The lower traveling body of the construction machine according to claim 4, wherein the outer restricting portion is disposed at a position outside an outer edge of the transformer lifter bracket in a width direction of the lower traveling body. A plurality of car body weights for stabilizing the lower traveling body;
The lower frame is provided on each axle, and has a car body weight bracket for attaching the car body weight,
The car body weight bracket is provided so as to protrude upward from the upper surface of the axle at a position on the inner side in the width direction of the lower traveling body than the transformer lifter bracket in each axle.
The lower travel body of the construction machine according to claim 3 or 5, wherein the restricting member is disposed at a position outside the car body weight bracket in the width direction of the lower travel body. A plurality of translifters for lifting the lower frame relative to the ground;
The lower frame is provided on each axle, and includes a bracket for a translifter for attaching the translifter,
The translifter bracket is opposite to the revolving body support portion of the axle at a position on the inner side of the axle when the crawler device is disposed on the innermost side in the width direction of the lower traveling body. Protruding from the side edge,
The restricting member is disposed on the axle on the side where the piping is disposed, at a position on the revolving support portion side of the transformer lifter bracket, and is spaced apart from a height position of the transformer lifter bracket. A lower restricting portion that comes into contact with the pipe from below so as to prevent the pipe from moving downward at the vertical position, and extends upward from the lower restricting portion, and the pipe extends in the width direction of the lower traveling body. The lower traveling body of the construction machine according to claim 1, further comprising an outer regulating portion that comes into contact with the pipe from the outside in the width direction so as to prevent the pipe from moving outward.   The restricting member is disposed at a position away from the lower restricting portion to the upper side and is attached to the outer restricting portion, and the upper restricting member that contacts the pipe from above so as to prevent the pipe from moving upward. The lower part traveling body of the construction machine according to claim 8 which has a section. A plurality of car body weights for stabilizing the lower traveling body;
The lower frame is provided on each axle, and has a car body weight bracket for attaching the car body weight,
The car body weight bracket projects upward from the upper surface of the axle at a position on the inner side of the axle when the crawler device is disposed on the innermost side in the width direction of the lower traveling body. Provided as
The restricting member is disposed on the axle on the side where the pipe is disposed, at a position on the outer side in the width direction of the lower traveling body with respect to the car body weight bracket, and the pipe is disposed in the width direction of the lower traveling body. An inner restricting portion that comes into contact with the pipe from the inner side in the width direction so as to prevent the inward movement, and an upper distance from the upper surface of the axle, and extends outward from the inner restricting portion in the width direction. The lower traveling body of the construction machine according to claim 1, further comprising an upper regulating portion that comes into contact with the pipe from above so as to prevent the pipe from moving upward.

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