JP2023022703A - Suspension link and crawler - Google Patents

Abstract

To provide a suspension link that is made compact when the suspension is not used.SOLUTION: A suspension link 25 comprises an intermediate link 40 and a distal link 50. The intermediate link 40 is rotatably attachable to the plane of a crawler frame 21 in the crawler lateral outside Y2. The distal link 50 is rotatably attached to the intermediate link 40, and can attach a suspension tool A for suspending the crawler frame 21. The intermediate link 40 and the distal link 50 are configured so that the links are made into a suspension state for suspending the crawler frame 21, and a storage state. The storage state is a state which can be made into a state except when the crawler frame 21 is suspended and a state in which the intermediate link 40 and the distal link 50 are folded.SELECTED DRAWING: Figure 2

Description

The present invention relates to hoisting links for hoisting crawlers and crawlers including hoisting links.

For example, Patent Literature 1 and the like describe a conventional suspension link (a suspension bracket in the same document). In the technique described in the document, suspension links (suspension brackets in the document) are attached to the crawler frame when the crawler is attached to and detached from the traveling body. A hoisting tool is attached to the hoisting link, and the crawler is hoisted.

Japanese Patent No. 6673521

In the invention described in the document, if the suspension link is attached to the crawler frame when the suspension link is not used, problems such as interference between the suspension link and other objects may occur due to the large size of the suspension link. be. In addition, if the suspension link is removed from the crawler frame when not in use, the suspension link is large enough to make it difficult to transport, for example, or require a large space to store the suspension link. There are cases where

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a suspension link and a crawler that can be made compact when not in use.

A suspension link is attachable to the crawler. The crawler includes a crawler frame that can be attached to a traveling body, and a crawler belt that is arranged around the crawler frame. The suspension link includes an intermediate link and a tip link. The intermediate link is rotatably mountable on a crawler laterally outer surface of the crawler frame. The tip link is rotatably attached to the intermediate link and can be attached with a sling for hoisting the crawler frame. The intermediate link and the tip link are configured to be able to be in a lifted state when lifting the crawler frame and a retracted state. The retracted state is a state in which the crawler frame can be put in a state other than when the crawler frame is lifted, and the state in which the intermediate link and the tip link are folded.

With the above configuration, the suspension link can be made compact when the suspension link is not used.

2 is a diagram of the work machine 1 including the crawler 20 as seen from the lateral direction Y. FIG. It is the figure which looked at the working machine 1 shown in FIG. 1 from the front-back direction X. FIG. It is the figure which looked at the crawler 20 shown in FIG. 1 from the horizontal direction Y. FIG. It is the figure which looked at the crawler 20 shown in FIG. 3 from the upper side Z1. It is the figure which looked at the suspension link 25 etc. of the suspended state shown in FIG. 3 from the front side X1. It is the figure which looked at the intermediate|middle link 40 shown in FIG. 5 from the front side X1. It is the figure which looked at the front-end|tip link 50 shown in FIG. 5 from the front side X1. FIG. 6 is a view equivalent to FIG. 5 and shows the suspension link 25 and the like in a state between the suspended state and the intermediate state. FIG. 5 is a view equivalent to FIG. 5 and shows the suspension link 25 and the like in an intermediate state. FIG. 5 is a view equivalent to FIG. 5 and shows the suspension link 25 and the like in the retracted state. FIG. 11 is a view of the suspended link 25 and the like in the retracted state shown in FIG.

A working machine 1 having a crawler 20 will be described with reference to FIGS. 1 to 11. FIG.

The working machine 1, as shown in FIG. 1, is a machine that performs work, such as a construction machine that performs construction work. The work machine 1 is, for example, a crane or the like that performs work using a boom or the like. The working machine 1 is, for example, a crawler crane. The work machine 1 includes an upper revolving body 11 and a lower travel body 13 . The upper revolving body 11 is rotatably mounted on the lower traveling body 13 .

The undercarriage 13 allows the work machine 1 to travel. As shown in FIG. 2 , the lower running body 13 includes a running body main body 13 a and crawlers 20 . The traveling body main body 13 a is a frame (car body frame) that supports the upper revolving body 11 .

The crawler 20 is a device that causes the work machine 1 to travel. The crawler 20 can be attached to the traveling body main body 13a. The crawlers 20 are arranged on both sides (right and left) in the lateral direction Y of the traveling body main body 13a. Each of the left and right crawlers 20, 20 is provided so as to extend in the front-rear direction X (see FIG. 1). The crawler 20 is detachable from the traveling body main body 13a. The reason for this is as follows. When the working machine 1 is transported, the working machine 1 is disassembled so as to fit within the restricted dimensions. At this time, the crawler 20 is removed from the traveling body main body 13a, and the crawler 20 and the traveling body main body 13a are separately transported. Therefore, the crawler 20 is detachable from the traveling body main body 13a. The crawler 20 includes a crawler frame 21 , a crawler belt 23 and suspension links 25 .

(definition of direction)
Let the longitudinal direction of the crawler 20 be the front-back direction X (refer FIG. 1). A lateral direction Y is a direction in which the left and right crawlers 20, 20 face each other when the left and right crawlers 20, 20 are attached to the traveling body main body 13a. The lateral direction Y is the width direction of the lower traveling body 13 (the traveling body lateral direction) and the width direction of the crawler 20 (the crawler lateral direction). In the lateral direction Y, the side closer to the lateral Y center of the running body main body 13a is defined as the lateral inner side Yi of the running body, and the side away from the lateral Y center of the running body main body 13a is referred to as the lateral outer side Yo of the running body. In the lateral direction Y, the side closer to the lateral Y center of the crawler 20 is the crawler lateral inner side Y1, and the side away from the lateral Y center of the crawler 20 is the crawler lateral outer side Y2. A vertical direction Z is defined as a direction in which the rotating shaft of the upper rotating body 11 extends with respect to the lower traveling body 13 . In the vertical direction Z, the side from the lower traveling body 13 toward the upper revolving body 11 is defined as an upper side Z1, and the side opposite to the upper side Z1 is defined as a lower side Z2. The up-down direction Z is, for example, a direction perpendicular to the front-rear direction X and the lateral direction Y, respectively. One of the left and right crawlers 20, 20 will be described below.

The crawler frame 21 can be attached to the traveling body main body 13a. The crawler frame 21 is a frame (structure) elongated in the front-rear direction X (see FIG. 1). The cross section of the crawler frame 21 seen from the front-rear direction X is, for example, a quadrangle or substantially a quadrangle. As shown in FIG. 5, the crawler frame 21 includes an upper member 21a, an inner side plate 21b, an outer side plate 21c, an inner lower member 21d, and an outer lower member 21e. The crawler frame 21 also includes a crawler frame inner side surface 21i, a crawler frame outer side surface 21o, a crawler side link attachment portion 21r, and a crawler side link storage portion 21s.

The upper member 21 a is a member provided on the upper side Z1 portion of the crawler frame 21 . For example, the upper member 21a is a plate (upper plate) arranged to extend in the lateral direction Y and the front-rear direction X. As shown in FIG. The inner side plate 21b is a member provided on the inner side Yi portion of the crawler frame 21 in the lateral direction of the traveling body. The inner side plate 21b is arranged to extend downward Z2 from the upper member 21a (the same applies to the outer side plate 21c). The inner side plate 21b is a plate arranged so as to extend in the vertical direction Z and the front-rear direction X (the same applies to the outer side plate 21c). The outer side plate 21c is a member provided on the outer Yo portion of the crawler frame 21 in the lateral direction of the traveling body. The outer side plate 21c is arranged on the outer side Yo in the lateral direction of the traveling body than the inner side plate 21b. The inner side plate 21b and the outer side plate 21c may be connected to each other in the horizontal direction Y by a connecting member (not shown) different from the upper member 21a.

The inner lower member 21d is a member (for example, a lower plate) provided on the lower Z2 portion (for example, the lower Z2 end) of the crawler frame 21 . "Edge" means edge and periphery of edge (and so on). The inner lower member 21d is provided on the inner side Yi portion of the crawler frame 21 in the lateral direction of the traveling body. The inner lower member 21d is arranged on the lower side Z2 of the inner side plate 21b and connected to the lower end of the inner side plate 21b (the relationship between the outer side plate 21c and the outer lower member 21e may be the same). The width of the inner lower member 21d in the lateral direction Y is wider than the width (thickness) of the inner side plate 21b in the lateral direction Y (the relationship between the outer side plate 21c and the outer lower member 21e may be the same). The inner lower member 21d protrudes laterally inward Yi and laterally outward Yo of the running body with respect to the inner side plate 21b (the relationship between the outer side plate 21c and the outer lower member 21e may be the same). The inner side plate 21b may be, for example, a plate extending in the front-rear direction X and the lateral direction Y, or may be block-shaped (the outer lower member 21e may be the same).

The outer lower member 21e is a member (for example, a lower plate) provided on the lower Z2 portion (for example, the lower Z2 end) of the crawler frame 21 . The outer lower member 21e is provided on the outer Yo portion of the crawler frame 21 in the lateral direction of the traveling body. A roller (not shown) that contacts the crawler belt 23 is arranged between the outer lower member 21e and the inner lower member 21d.

The crawler frame inner side surface 21i is a surface of the crawler frame 21 on the side to which the traveling body main body 13a (see FIG. 2) is attached (that is, the inner side Yi in the lateral direction of the traveling body). The crawler frame inner side surface 21i is, for example, the surface of the member that constitutes the inner side Yi portion of the crawler frame 21 in the lateral direction of the traveling body. Specifically, the crawler frame inner surface 21i is the surface of the upper member 21a, the inner side plate 21b, and the inner lower member 21d on the inner side Yi in the lateral direction of the traveling body.

The crawler frame outer side surface 21o is a surface of the crawler frame 21 on the opposite side in the lateral direction Y to the side on which the traveling body main body 13a (see FIG. 2) is attached (that is, the laterally outer side Yo of the traveling body). The crawler frame outer side surface 21o is, for example, the surface of the outer side Yo of the traveling body of the member constituting the outer side Yo portion of the crawler frame 21 in the lateral direction of the traveling body. Specifically, the crawler frame outer surface 21o is the outer surface Yo of the upper member 21a, the outer side plate 21c, and the outer lower member 21e in the lateral direction of the traveling body. Suspension links 25, which will be described later, may be attached to the crawler frame outer surface 21o or the crawler frame inner surface 21i. Below, the case where the suspension link 25 is attached to the crawler frame outer surface 21o will be described.

The crawler-side link attachment portion 21r is a portion (suspension link attachment bracket) to which the suspension link 25 is attached. The crawler-side link attachment portion 21r protrudes from the crawler frame outer surface 21o to the outer side Yo of the traveling body. For example, the crawler-side link attachment portion 21r protrudes from the upper member 21a and the outer side plate 21c to the outer side Yo in the lateral direction of the traveling body. The crawler-side link attachment portion 21r is, for example, a plate-like shape extending in the vertical direction Z and the lateral direction Y (the crawler-side link storage portion 21s may be the same).

The crawler-side link storage portion 21s is a portion (suspension link storage bracket) to which an intermediate link 40 (described later) is attached when the suspension link 25 is in a retracted state (see FIG. 10, described later). The crawler-side link storage portion 21s protrudes from the crawler frame outer surface 21o (for example, the surface of the outer lower member 21e on the outer side Yo of the outer side Yo of the outer side) to the outer side Yo of the outer side Yo.

The crawler belt 23 is arranged around the crawler frame 21 (see FIG. 1). As shown in FIG. 2 , the crawler belt 23 is arranged on the lower side Z<b>2 of the upper revolving body 11 and is spaced apart from the upper revolving body 11 in the vertical direction Z. Even when the upper revolving body 11 revolves with respect to the lower traveling body 13, the crawler belt 23 is arranged on the lower side Z2 than the upper revolving body 11, and is spaced from the upper revolving body 11 in the vertical direction Z. are placed. The crawler belt 23 is attached to the crawler frame 21 via rollers (not shown) or the like, and is driven by a traveling motor (not shown) provided on the crawler frame 21 . The crawler belt 23 is formed by connecting a plurality of crawler shoes.

The suspension link 25 is a member (crawler suspension link) for suspending the crawler 20 . Suspension link 25 is used for assembly and disassembly of work machine 1 . The suspension link 25 is a member that enables the crawler 20 to be easily suspended when the crawler 20 is attached to or detached from (attached to or removed from) the traveling body main body 13a. Suspension links 25 can be attached to the crawler frame 21 . The suspension link 25 may be detached from the crawler frame 21 or may not be detached from the crawler frame 21 (it may remain attached).

This suspension link 25 is attached to the outer surface 21o of the crawler frame, as shown in FIG. For example, the suspension link 25 is not attached to the crawler frame inner side surface 21i, but is attached only to the crawler frame outer side surface 21o (only one side). Here, when the suspension link 25 is attached to the inner side surface 21i of the crawler frame, the suspension link 25 is arranged in a narrow space between the traveling body main body 13a (see FIG. 2) and the crawler frame 21. FIG. Therefore, the work related to the suspension link 25 may become difficult. On the other hand, when the suspension link 25 is attached to the outer surface 21o of the crawler frame, the work related to the suspension link 25 can be easily performed. As a modification, the suspension link 25 may be attached to the inner side surface 21i of the crawler frame. As will be described later, the suspension link 25 (the intermediate link 40 and the tip link 50, which will be described later) can be in a suspended state, an intermediate state (see FIG. 9), and a retracted state (see FIG. 10). is. The suspension link 25 in the suspended state will be mainly described below, and the retracted state and the intermediate state will be described later. As shown in FIG. 3 , the suspension link 25 includes a front link 30 , a rear link 80 and front and rear link connecting portions 90 .

As shown in FIG. 5, the front link 30 has a curved shape, such as a substantially C shape when viewed in the front-rear direction X, for example. The front link 30 has an intermediate link 40 and a tip link 50 . The front link 30 includes an intermediate link rotation shaft portion 61, an intermediate link rotation restriction portion 62, a tip link rotation shaft portion 63, a tip link positioning portion 64, an intermediate link storage portion 65, a tip link storage portion 66, and a tip link support portion 67 .

The intermediate link 40 can be attached to the crawler frame 21 as shown in FIG. The intermediate link 40 is rotatably attached to the surface of the crawler lateral direction outer side Y2 of the crawler frame 21 (for example, the crawler frame outer surface 21o). The intermediate link 40 is attached to the crawler frame outer surface 21o via the crawler-side link attachment portion 21r. The intermediate link 40 is rotatable around an intermediate link rotating shaft portion 61 (see FIG. 8). The intermediate link 40 protrudes from the crawler-side link attachment portion 21r to the crawler lateral direction outer side Y2. As shown in FIG. 5, the intermediate link 40 is provided so as to extend from the crawler-side link attachment portion 21r toward the crawler laterally outer Y2 portion of the crawler belt 23 from the crawler laterally outer Y2 end. The intermediate link 40 is provided so as to extend in a direction inclined with respect to the lateral direction Y so as to be arranged on the upper side Z1 toward the outer side Y2 in the lateral direction of the crawler. For example, as shown in FIG. 6 , the intermediate link 40 includes an intermediate link body portion 41 , an intermediate link body projecting portion 43 and an intermediate link detour portion 45 . In FIG. 6, elements other than the intermediate link 40 and the tip link storage portion 66 are indicated by two-dot chain lines.

The intermediate link body portion 41 is the body portion of the intermediate link 40 . The intermediate link body portion 41 has, for example, a plate-like member, and may have only one plate-like member, or may have a plurality of plate-like members (for example, two plates, etc.) as shown in FIG. . For example, in the example shown in FIG. 3, the two plate-like members forming the intermediate link body portion 41 are arranged so as to sandwich the crawler-side link mounting portion 21r from the front-rear direction X. As shown in FIG. For example, the crawler-side link attachment portion 21r may include two plate-like members, or may be arranged so as to sandwich the intermediate link body portion 41 of one plate-like member (not shown). As shown in FIG. 6, the intermediate link main body portion 41 is substantially L-shaped or the like when viewed from the front-rear direction X. As shown in FIG. For example, the intermediate link body portion 41 includes an intermediate link inclined portion 41a and an intermediate link upper projecting portion 41b.

The intermediate link inclined portion 41a is provided so as to extend from the crawler-side link mounting portion 21r to the crawler lateral direction outer side Y2 and the upper side Z1. The intermediate link inclined portion 41a is provided so as to extend in a direction inclined with respect to the horizontal direction Y so as to be arranged on the upper side Z1 toward the outer side Y2 in the crawler horizontal direction.

The intermediate link upper projecting portion 41b projects upward Z1 from the crawler lateral direction outer Y2 portion of the intermediate link inclined portion 41a.

The intermediate link body projecting portion 43 is a portion where the tip link housing portion 66 is provided. The intermediate link body projecting portion 43 projects upward Z1 from the crawler laterally inner Y1 portion of the intermediate link body portion 41 (more specifically, the intermediate link inclined portion 41a). The intermediate link body projecting portion 43 may be configured continuously (integrally) with the intermediate link body portion 41 or may be a separate body from the intermediate link body portion 41 . For example, the intermediate link main body projecting portion 43 may be arranged so as to be sandwiched between the intermediate link main body portions 41 (see FIG. 3) of two plate-like members.

As shown in FIG. 5, the intermediate link bypass section 45 is provided so as to bypass the crawler belt 23 (for details, refer to the tip link bypass section 55, which will be described later). As shown in FIG. 6 , the intermediate link detour portion 45 is provided on the crawler lateral direction outside Y2 portion of the intermediate link body portion 41 . For example, when viewed in the front-rear direction X, the intermediate link detour portion 45 is configured by an upper side Z1 of the intermediate link inclined portion 41a and an inner side Y1 of the intermediate link upper projecting portion 41b in the crawler lateral direction.

The tip link 50 is rotatably attached to the intermediate link 40 as shown in FIG. The tip link 50 is rotatable around the tip link rotating shaft portion 63 (see FIGS. 9 and 10). The leading end link 50 is located near the center of the crawler belt 23 in the lateral direction Y and above the crawler belt 23 from the crawler laterally outer Y2 portion of the intermediate link 40 (more specifically, the intermediate link upper projecting portion 41b). provided to extend toward the For example, as shown in FIG. 7 , the tip link 50 includes a tip link body portion 51 , a tip link bypass portion 55 , a sling attachment portion 57 , and a front and rear link connection portion attachment portion 59 . Note that in FIG. 7, elements other than the tip link 50 are indicated by two-dot chain lines.

The tip link body portion 51 is the body portion of the tip link 50 . The tip link body portion 51 has, for example, a plate-like member, and may have a plurality of (for example, two) plate-like members, or may have only one plate-like member. For example, in the example shown in FIG. 3 , the crawler laterally outer Y2 portion of the tip link main body portion 51 is arranged so as to be sandwiched between the two plate members of the intermediate link main body portion 41 . As shown in FIG. 7, the tip link main body portion 51 is substantially L-shaped or the like when viewed from the front-rear direction X. As shown in FIG. For example, the tip link body portion 51 includes a tip link inclined portion 51a and a tip link straight portion 51b.

The tip link inclined portion 51 a constitutes the crawler lateral direction outer Y2 portion of the tip link 50 . The tip link inclined portion 51a is provided so as to extend from the intermediate link body portion 41 (more specifically, the intermediate link upper projecting portion 41b) to the upper side Z1 and the crawler lateral direction inner side Y1. The leading end link inclined portion 51a is provided so as to extend in a direction inclined with respect to the up-down direction Z so that the upper side Z1 is arranged on the inner side Y1 in the crawler horizontal direction.

The leading end link linear portion 51b is provided so as to extend from the upper side Z1 portion of the leading end link inclined portion 51a to the inner side Y1 in the crawler horizontal direction. The tip link linear portion 51b is substantially linear (beam-shaped).

As shown in FIG. 5 , the leading end link detouring portion 55 is provided so as to bypass the crawler belt 23 . The tip link detouring portion 55 is provided on the crawler lateral direction outer side Y2 (more specifically, the tip link inclined portion 51a) of the tip link body portion 51 . For example, when viewed in the front-rear direction X, the tip link detour portion 55 is configured by the inner side Y1 of the tip link inclined portion 51a in the crawler horizontal direction and the lower side Z2 of the tip link straight portion 51b. The tip link detour part 55 and the intermediate link detour part 45 are arranged so as not to interfere with the crawler belt 23 . As shown in FIG. 8 , the tip link detouring portion 55 and the intermediate link detouring portion 45 are arranged so as not to interfere with the crawler belt 23 even when the suspension link 25 rotates about the intermediate link rotating shaft portion 61 . . As shown in FIG. 5 , the leading end link detouring portion 55 and the intermediate link detouring portion 45 are located below the crawler belt 23 in the crawler lateral direction Y2 so as to bypass the crawler laterally outer Y2 portion of the crawler belt 23 . , and on the upper side Z1. The tip link detour part 55 and the intermediate link detour part 45 have a curved shape, and are, for example, C-shaped when viewed from the front-rear direction X. As shown in FIG.

The sling attachment portion 57 is a portion (suspension position) to which the sling A can be attached. The hanger mounting portion 57 is provided on the tip link body portion 51, more specifically, is provided on the tip link linear portion 51b, and is provided on the tip portion of the tip link body portion 51 (the end portion of the inner side Yi in the lateral direction of the traveling body). . The hanger mounting portion 57 is arranged on the inner side Yi in the lateral direction of the traveling body from the tip link detouring portion 55 . The hoist A attached to the hoist attachment portion 57 is a member for hoisting the crawler frame 21 . For example, the sling A includes a shackle Aa (see FIG. 3) and a rope Ab (see FIG. 1). The shackle Aa is a metal fitting connected to the sling attachment portion 57 . A rope Ab (tension member) shown in FIG. 1 is connected to a shackle Aa and a crane hook (not shown) for lifting the crawler 20 . The "crane for lifting the crawler 20" may be an auxiliary crane for assembling and disassembling the working machine 1, or may be the working machine 1 (the working machine 1 may detach the crawler 20 by itself). In addition, the structure of the hanger A does not have to be the one described above. For example, instead of the rope Ab, belt-shaped members (tension members) such as chains, wires, and slings (sling belts, belt slings, etc.) may be used.

The front and rear link connection portion attachment portion 59 (see FIG. 7) is a portion to which the front and rear link connection portion 90 shown in FIG. 4 is attached. As shown in FIG. 7 , the front-rear link connecting portion mounting portion 59 is provided on the tip link body portion 51 . The front-rear link connecting portion attachment portion 59 may be provided on the tip link inclined portion 51a or may be provided on the tip link straight portion 51b. In the example shown in FIG. 7 , the front-rear link connecting portion attaching portion 59 is provided on the upper side Z1 portion of the tip link body portion 51 . Only one front/rear link connecting portion mounting portion 59 may be provided, or a plurality of (three in FIG. 7) may be provided. Note that the front-rear link connecting portion mounting portion 59 may be provided on the intermediate link 40 .

The intermediate link rotating shaft portion 61 is a portion that serves as a rotating shaft of the intermediate link 40 with respect to the crawler frame 21, as shown in FIG. For example, the intermediate link rotating shaft portion 61 has a pin and a pin hole (the intermediate link rotation restricting portion 62, the tip link rotating shaft portion 63, the tip link positioning portion 64, and the intermediate link storing portion 65 ). A "pin hole" may mean an inner surface of an object (for example, the crawler-side link attachment portion 21r, etc.) that forms a hole into which a pin is inserted. The intermediate link rotating shaft portion 61 may be configured with something other than a pin and a pin hole (the intermediate link rotation restricting portion 62, the tip link rotating shaft portion 63, the tip link positioning portion 64, and the intermediate link storing portion 65 may also be configured). as well). For example, as shown in FIG. 6, the intermediate link rotating shaft portion 61 includes a first crawler-side pin hole 61a, a first intermediate-link pin hole 61b, and a first pin 61p.

The first crawler-side pin hole 61 a is a pin hole provided in the crawler frame 21 . The first crawler-side pin hole 61a is provided in the crawler-side link attachment portion 21r. For example, the crawler-side first pin hole 61a penetrates in the front-rear direction X through the crawler-side link attachment portion 21r. When the pin hole is a through hole, the point that the through hole is the front-rear direction X is the same for other pin holes (for example, the intermediate link side first pin hole 61b).

The intermediate link side first pin hole 61 b is a pin hole provided in the intermediate link 40 . The intermediate link side first pin hole 61b is provided, for example, in the intermediate link main body portion 41, and is provided, for example, at the crawler laterally inner Y1 portion (for example, end portion) of the intermediate link inclined portion 41a.

The first pin 61p rotatably couples the crawler frame 21 and the intermediate link 40 together. The first pin 61p is inserted (attached) into the crawler-side first pin hole 61a and the intermediate link-side first pin hole 61b.

The intermediate link rotation restricting portion 62 restricts (fixes) the rotation of the intermediate link 40 with respect to the crawler frame 21, as shown in FIG. For example, as shown in FIG. 6, the intermediate link rotation restricting portion 62 includes a crawler-side second pin hole 62a, an intermediate link-side second pin hole 62b, and a second pin 62p.

The crawler-side second pin hole 62 a is a pin hole provided in the crawler frame 21 . For example, the crawler-side second pin hole 62a is provided in the crawler-side link attachment portion 21r. For example, the crawler-side second pin holes 62a are arranged so as to be aligned in the vertical direction Z with the crawler-side first pin holes 61a. For example, the crawler-side second pin hole 62a is arranged on the upper side Z1 than the crawler-side first pin hole 61a.

The intermediate link side second pin hole 62 b is a pin hole provided in the intermediate link 40 . The intermediate link side second pin hole 62b is provided, for example, in the intermediate link body portion 41, and is provided, for example, in the crawler laterally inner Y1 portion (for example, end portion) of the intermediate link inclined portion 41a. For example, the intermediate link side second pin hole 62b is arranged so as to be aligned in the vertical direction Z with the intermediate link side first pin hole 61b. For example, the intermediate link side second pin hole 62b is arranged above the intermediate link side first pin hole 61b Z1.

The second pin 62p is attached to and detached from (attached to and removed from) the crawler-side second pin hole 62a and the crawler-side second pin hole 62a. The second pin 62p restricts rotation of the intermediate link 40 with respect to the crawler frame 21 by being attached to the crawler-side second pin hole 62a and the crawler-side second pin hole 62a. By removing the second pin 62p from the crawler-side second pin hole 62a and the crawler-side second pin hole 62a, as shown in FIG. ) is released.

As shown in FIG. 5 , the tip link rotating shaft portion 63 is a portion that serves as a rotating shaft of the tip link 50 with respect to the intermediate link 40 . For example, as shown in FIG. 6, the tip link rotating shaft portion 63 includes an intermediate link side third pin hole 63b, a tip link side third pin hole 63c, and a third pin 63p.

The intermediate link side third pin hole 63 b is a pin hole provided in the intermediate link 40 . The intermediate link side third pin hole 63 b is provided in the intermediate link body portion 41 . More specifically, the intermediate link side third pin hole 63b is a portion (for example, an end portion) of the intermediate link body portion 41 on the side opposite to the intermediate link side first pin hole 61b and the intermediate link side second pin hole 62b. provided in The intermediate link side third pin hole 63b is provided, for example, in the crawler lateral direction outer Y2 portion (eg, end portion) of the intermediate link main body portion 41, and is provided, for example, in the intermediate link upper projecting portion 41b.

The tip link side third pin hole 63c is a pin hole provided in the tip link body portion 51, as shown in FIG. The tip link side third pin hole 63c is provided, for example, in the tip link sloped portion 51a, and is provided, for example, in the lower side Z2 portion (for example, the end) of the tip link sloped portion 51a.

The third pin 63p rotatably couples the intermediate link 40 and the tip link 50 together. The third pin 63p is inserted into the intermediate link side third pin hole 63b and the tip link side third pin hole 63c.

The tip link positioning part 64 restricts (fixes, positions) the rotation of the tip link 50 with respect to the intermediate link 40, as shown in FIG. For example, as shown in FIG. 6, the tip link positioning portion 64 includes an intermediate link side fourth pin hole 64b, a tip link side fourth pin hole 64c (see FIG. 7), and a fourth pin 64p.

The intermediate link side fourth pin hole 64 b is a pin hole provided in the intermediate link 40 . The intermediate link side fourth pin hole 64b is provided, for example, in the intermediate link main body portion 41, for example, provided in the crawler laterally outer Y2 portion (for example, end portion) of the intermediate link main body portion 41, and is provided, for example, in the intermediate link main body portion. 41 is provided at the upper Z1 portion (for example, the end). The intermediate link side fourth pin hole 64b is arranged, for example, substantially aligned with the intermediate link side third pin hole 63b in the horizontal direction Y, and is arranged, for example, on the outer side Y2 in the crawler horizontal direction of the intermediate link side third pin hole 63b. be done.

The tip link side fourth pin hole 64c is a pin hole provided in the tip link 50, as shown in FIG. The tip link side fourth pin hole 64c is provided, for example, in the tip link main body portion 51, for example, in the crawler lateral direction outside Y2 portion (for example, end portion) of the tip link main body portion 51. As shown in FIG. The tip link side fourth pin hole 64c is provided, for example, in the tip link sloped portion 51a, for example, in the lower Z2 portion (for example, the end) of the tip link sloped portion 51a. The tip link side fourth pin hole 64c is arranged, for example, substantially aligned with the tip link side third pin hole 63c in the lateral direction Y, and is arranged, for example, on the outer side Y2 of the crawler lateral direction from the tip link side third pin hole 63c. be.

The fourth pin 64p is attached to and detached from the intermediate link side fourth pin hole 64b (see FIG. 6) and the tip link side fourth pin hole 64c. The fourth pin 64p restricts the rotation of the tip link 50 with respect to the intermediate link 40 by being attached to the intermediate link side fourth pin hole 64b (see FIG. 6) and the tip link side fourth pin hole 64c. By removing the fourth pin 64p from the intermediate link side fourth pin hole 64b (see FIG. 6) and the tip link side fourth pin hole 64c, as shown in FIG. Release the restriction of rotation by the 4-pin 64p.

The intermediate link storage section 65 restricts (fixes) the rotation of the intermediate link 40 with respect to the crawler frame 21 when the suspension link 25 is in the stored state. For example, as shown in FIG. 5, the intermediate link storage portion 65 includes a crawler-side fifth pin hole 65a, an intermediate link-side fifth pin hole 65b, and a fifth pin 65p (see FIG. 10).

The fifth crawler-side pin hole 65 a is a pin hole provided in the crawler frame 21 . The fifth crawler-side pin hole 65a is provided in the crawler-side link storage portion 21s.

The intermediate link side fifth pin hole 65 b is a pin hole provided in the intermediate link 40 . The intermediate link side fifth pin hole 65b is provided, for example, in the intermediate link body portion 41, for example, in the intermediate link inclined portion 41a, for example, in the crawler laterally outer Y2 portion of the intermediate link inclined portion 41a. The intermediate link side fifth pin hole 65b is provided in the vicinity of the side of the lower side Z2 of the intermediate link inclined portion 41a when viewed in the front-rear direction X, for example. For example, the intermediate link side fifth pin hole 65b is arranged so as to be substantially aligned in the vertical direction Z with the intermediate link side third pin hole 63b. For example, as shown in FIG. 6, the intermediate link side fifth pin hole 65b is arranged on the lower side Z2 than the intermediate link side fourth pin hole 64b and the intermediate link side third pin hole 63b.

The fifth pin 65p (see FIG. 10) is attached to and detached from the crawler-side fifth pin hole 65a and the intermediate link-side fifth pin hole 65b shown in FIG. As shown in FIG. 10, when the suspension link 25 is in the retracted state and attached to the crawler frame 21, the fifth pin 65p is in the crawler-side fifth pin hole 65a (see FIG. 5) and the intermediate link-side fifth pin hole 65a (see FIG. 5). It is attached to the pin hole 65b (see FIG. 5). Thereby, the fifth pin 65p restricts the rotation of the intermediate link 40 with respect to the crawler frame 21. As shown in FIG. By removing the fifth pin 65p from the crawler-side fifth pin hole 65a (see FIG. 5) and the intermediate-link-side fifth pin hole 65b (see FIG. 5), the fifth pin 65p of the intermediate link 40 relative to the crawler frame 21 is removed. is released (see FIG. 5).

The tip link storage portion 66 restricts (fixes) the rotation of the tip link 50 with respect to the intermediate link 40 when the suspension link 25 is in the retracted state. For example, the tip link storage portion 66 may have a pin and a pin hole, or may have a member that connects members (specifically, a tip link storage connection portion 66d). It may have a member that connects the members together. Specifically, for example, the tip link storage portion 66 includes an intermediate link side sixth pin hole 66b (see FIG. 6), a tip link side sixth pin hole 66c (see FIG. 7), and a tip link storage connecting portion 66d. , an intermediate link side sixth pin 66p1, and a tip link side sixth pin 66p2.

The intermediate link side sixth pin hole 66b is a pin hole provided in the intermediate link 40, as shown in FIG. The intermediate link side sixth pin hole 66 b is provided in the intermediate link main body projecting portion 43 . The intermediate link side sixth pin hole 66 b may be provided in the intermediate link body portion 41 .

The tip link side sixth pin hole 66c is a pin hole provided in the tip link 50, as shown in FIG. The tip link side sixth pin hole 66c is provided, for example, in the tip link body portion 51, and is provided, for example, in the tip link linear portion 51b. The sixth pin hole 66c on the tip link side is provided, for example, in the central portion of the tip link straight portion 51b in the longitudinal direction (lateral direction Y), and is located below the tip link straight portion 51b when viewed in the front-rear direction X, for example. It is arranged near the side of Z2.

As shown in FIG. 10, the tip link retracting connecting portion 66d is connected to the intermediate link 40 and the tip link 50 when the suspension link 25 is in the retracted state. The leading end link storage connecting portion 66d may have, for example, a plate-shaped member, may have a plurality of (for example, two) plate-shaped members, or may have only one plate-shaped member. good. When the suspension link 25 is in a state different from the retracted state, as shown in FIG. may be (stored).

As shown in FIG. 10, the intermediate link side sixth pin 66p1 connects the intermediate link 40 and the tip link storage connecting portion 66d. The intermediate-link-side sixth pin 66p1 rotatably connects the front-end link storage connecting portion 66d to the intermediate link 40. As shown in FIG. When the suspension link 25 is in the stored state, the intermediate link side sixth pin 66p1 is attached to the intermediate link side sixth pin hole 66b (see FIG. 6) and the pin hole provided in the tip link storing connecting portion 66d.

The tip link side sixth pin 66p2 connects the tip link 50 and the tip link storage connecting portion 66d. The intermediate-link-side sixth pin 66p1 may rotatably connect the leading end link storage connecting portion 66d to the leading end link 50 . When the suspension link 25 is in the stored state, the tip link side sixth pin 66p2 is attached to the tip link side sixth pin hole 66c (see FIG. 7) and the pin hole provided in the tip link storage connecting portion 66d.

The tip link support 67 limits the rotation of the tip link 50 with respect to the intermediate link 40, as shown in FIG. The tip link support portion 67 restricts the rotation of the tip link 50 with respect to the intermediate link 40 in the direction in which the tip link straight portion 51b moves away from the intermediate link inclined portion 41a. The tip link support portion 67 does not restrict the rotation of the tip link 50 with respect to the intermediate link 40 in the direction in which the tip link straight portion 51b approaches the intermediate link inclined portion 41a (see FIG. 10). The tip link support portion 67 includes an intermediate link side support portion 67b (see FIG. 6) and a tip link side support portion 67c (see FIG. 7).

The intermediate link side support portion 67b is provided on the intermediate link 40 as shown in FIG. The intermediate link side support portion 67 b is provided on the intermediate link body portion 41 and fixed to the intermediate link body portion 41 . The intermediate link side support portion 67b protrudes, for example, from the crawler laterally outer Y2 portion (for example, end) of the intermediate link body portion 41 to the crawler laterally outer Y2. The intermediate link side support portion 67b may have a block-shaped portion or a plate-shaped portion. The intermediate link side support portion 67b may have a plate-like portion extending in the up-down direction Z and the front-rear direction X, for example. For example, as shown in FIG. 3, when the intermediate link body portion 41 has two plate-shaped portions, the intermediate link side support portion 67b is fixed to one of the two plate-shaped portions of the intermediate link body portion 41. Alternatively, it may be arranged so as to span two plate-like portions of the intermediate link body portion 41 .

The tip link side support portion 67c is provided on the tip link 50, as shown in FIG. The tip link side support portion 67c is configured to be able to come into contact with the intermediate link side support portion 67b (see FIG. 6). The tip link side support portion 67 c restricts the rotation of the tip link 50 with respect to the intermediate link 40 by coming into contact with the intermediate link side support portion 67 b. The tip link side support portion 67c and the intermediate link side support portion 67b (see FIG. 6) are provided, for example, at the crawler lateral direction outside Y2 portion (for example, end portion) of the front link 30. As shown in FIG. The tip link side support portion 67c is provided, for example, in the tip link body portion 51, and is provided, for example, at the crawler lateral direction outside Y2 portion (eg, end portion) of the tip link body portion 51. As shown in FIG. The tip link side support portion 67c has, for example, a notch shape, and is configured to be recessed, for example, from the crawler laterally outer Y2 end of the tip link body portion 51 toward the crawler laterally inner Y1.

The rear link 80 is constructed similarly or substantially similarly to the front link 30, as shown in FIG. The rear link 80 is symmetrical or substantially symmetrical to the front link 30 in the front-rear direction X, for example. The rear link 80 is spaced apart from the front link 30 in the front-rear direction X (longitudinal direction of the crawler frame 21). The rear link 80, like the front link 30, includes an intermediate link 40 and a tip link 50. As shown in FIG. As with the front link 30 shown in FIG. 5, the rear link 80 includes an intermediate link rotation shaft portion 61, an intermediate link rotation restriction portion 62, a tip link rotation shaft portion 63, a tip link positioning portion 64, an intermediate link storage portion 65, a tip A link storage section 66 and a tip link support section 67 are provided. 5 is a view of the front link 30 and the like from the front side X1 of the front link 30, but if FIG. , etc. (the same applies to FIGS. 6 to 10).

The front-rear link connection portion 90 is connected to the front link 30 and the rear link 80 to fix the front link 30 and the rear link 80 to each other. The front-rear link connection portion 90 is connected to a portion of the front link 30 (rear link 80 (as well as connections to ). Note that the crawler frame 21 is not included in the front-rear link connection portion 90 . For example, as shown in FIG. 4 , the front-rear link connection portion 90 is connected to the front link 50 of the front link 30 and the front link 50 of the rear link 80 . The front-rear link connection portion 90 may be connected to the intermediate link 40 of the front link 30 and the intermediate link 40 of the rear link 80 . The front and rear link connection portion 90 is directly connected to the front link 30 (connection to the rear link 80 is the same), and more specifically, to the front and rear link connection portion mounting portion 59 (see FIG. 7). For example, the front-rear link connection portion 90 may be connected to the front link 30 by welding, or may be connected to the front link 30 by a fastening member (for example, a bolt and nut).

The front-rear link connecting portion 90 receives the acting force in the front-rear direction X acting on the front link 30 and the rear link 80 . More specifically, for example, a hoist A attached to the front link 30 and a hoist A attached to the rear link 80 shown in FIG. For example, it is assumed that the In such a case, the force acting to bend the front link 30 and the rear link 80 in the longitudinal direction X acts on the front link 30 and the rear link 80 . Specifically, a force acts on the front link 30 and the rear link 80 so that the front link 30 and the rear link 80 (for example, the tip links 50 ) approach each other in the front-rear direction X. The front-rear link connecting portion 90 integrates the front link 30 and the rear link 80 . Therefore, it is possible to improve the strength of the suspension link 25 against the force in the longitudinal direction X (which is advantageous in terms of design).

The front-rear link connection portion 90 is provided so as to extend in the front-rear direction X, for example, as shown in FIG. 4 . The front-rear link connection portion 90 may be, for example, rod-shaped (substantially linear), substantially rod-shaped, plate-shaped, or substantially plate-shaped. For example, a plurality of (three in the example shown in FIG. 4) may be provided, or only one front and rear link connection portion 90 may be provided. For example, when a plurality of front and rear link connection portions 90 are provided, the plurality of front and rear link connection portions 90 are preferably arranged as follows. As shown in FIG. 11 , when the suspension link 25 is in the retracted state and attached to the crawler frame 21 , the plurality of front and rear link connection portions 90 are spaced apart in the vertical direction Z. As shown in FIG. In this case, the plurality of front and rear link connection portions 90 can be used as a ladder for the worker to ascend and descend the crawler 20, a scaffold for the worker to work on, and the like. In addition, when the plurality of front and rear link connection portions 90 are used as a ladder, the width of the interval in the vertical direction Z between the plurality of front and rear link connection portions 90 is preferably a width suitable for the ladder. is, for example, 250 mm to 300 mm.

(Hanging state)
As shown in FIG. 5, when the suspension links 25 lift the crawler frame 21, the suspension links 25 (more specifically the intermediate links 40 and the tip links 50) are placed in a suspended state. The suspension link 25 in the suspended state is in the following state.

The suspension link 25 is arranged to bypass the crawler belt 23 in the suspended state. More specifically, the intermediate link detouring portion 45 and the tip link detouring portion 55 are spaced apart in the vertical direction Z and the lateral direction Y from the crawler laterally outer Y2 portion of the crawler belt 23 .

In the suspended state, the sling attachment portion 57 is arranged above the crawler belt 23 Z1. The hanger mounting portion 57 is arranged near the center portion of the crawler belt 23 in the lateral direction Y. As shown in FIG. The sling attachment portion 57 is arranged directly above or substantially above the center of gravity of the crawler 20 . The center of gravity of the crawler 20 is inside the width of the crawler belt 23 in the lateral direction Y (the inner side Y1 in the lateral direction of the crawler from both ends of the outer side Y2 in the lateral direction of the crawler).

In the suspended state, the intermediate link rotation restricting portion 62 restricts rotation of the intermediate link 40 with respect to the crawler frame 21 . Specifically, the second pin 62p is attached (inserted) into the crawler-side second pin hole 62a (see FIG. 6) and the intermediate link-side second pin hole 62b (see FIG. 6).

In the suspended state, the tip link positioning portion 64 and the tip link support portion 67 restrict rotation of the tip link 50 with respect to the intermediate link 40 . Specifically, the fourth pin 64p is attached to the intermediate link side fourth pin hole 64b (see FIG. 6) and the tip link side fourth pin hole 64c (see FIG. 7). The intermediate link side support portion 67b (see FIG. 6) contacts the tip link side support portion 67c (see FIG. 7).

(Change from suspended state to intermediate state)
Suspension link 25 (more specifically intermediate link 40 and tip link 50) is changed from the suspended state to the intermediate state as follows. The restriction on rotation of the intermediate link 40 with respect to the crawler frame 21 by the intermediate link rotation restricting portion 62 is released. Specifically, the second pin 62p is removed from the crawler-side second pin hole 62a (see FIG. 6) and the intermediate link-side second pin hole 62b (see FIG. 6).

Next, as shown in FIG. 8, the suspension link 25 is rotated around the intermediate link rotating shaft portion 61 (more specifically, the first pin 61p). At this time, for example, a machine for assembly (a machine for assembly) different from the work machine 1 (see FIG. 1) may rotate the suspension link 25 while suspending it via a suspension tool A (see FIG. 1). (The same applies to the change from the intermediate state to the stored state, which will be described later). Further, for example, the work machine 1 in the middle of assembly or disassembly may rotate while suspending the suspension link 25 (the same applies to the change from the intermediate state to the storage state, which will be described later). Further, for example, the operator may manually rotate the suspension link 25 (the same applies to the change from the intermediate state to the retracted state, which will be described later). At this time, the suspension link 25 is rotated in a direction in which the suspension attachment portion 57 moves to the crawler lateral direction outer side Y2. At this time, the shape of the suspension link 25 (more specifically, the intermediate link detour portion 45 and the tip link detour portion 55 ) is set so that the suspension link 25 does not interfere with (contact with) the crawler belt 23 . Then, as shown in FIG. 9, the rotation of the intermediate link 40 with respect to the crawler frame 21 is restricted, for example, by contacting the intermediate link 40 with the crawler frame 21 (for example, the outer lower member 21e). As a result, the suspension link 25 is in the intermediate state. The trajectory T of the center position of the hoist attachment portion 57 when the hoist link 25 changes from the hoisted state to the intermediate state is indicated by a dashed line in FIG.

(intermediate state)
As shown in FIG. 9 , when the suspension link 25 (more specifically, the intermediate link 40 and the tip link 50 ) is in the intermediate state, the suspension attachment portion 57 is positioned closer to the crawler than the crawler laterally outer Y2 end of the crawler belt 23 . It is arranged on the laterally outer side Y2. When the suspension link 25 is in the intermediate state, the position of the suspension attachment portion 57 in the vertical direction Z is the same or substantially the same as the position of the intermediate link rotating shaft portion 61 in the vertical direction Z, for example. When the suspension link 25 is in the intermediate state, the leading end link body portion 51 (more specifically, the leading end link linear portion 51b) is tilted with respect to the vertical direction Z so that the upper side Z1 is arranged on the outer side Y2 in the crawler horizontal direction. are arranged so as to extend to

(change from intermediate state to stored state)
Suspension links 25 (more specifically intermediate links 40 and leading links 50) are changed from the intermediate state to the retracted state as follows. The restriction on rotation of the tip link 50 with respect to the intermediate link 40 by the tip link positioning part 64 is released. Specifically, the fourth pin 64p is removed from the intermediate link side fourth pin hole 64b (see FIG. 6) and the tip link side fourth pin hole 64c (see FIG. 7). The leading link 50 is then rotated relative to the intermediate link 40 . At this time, the tip link 50 is rotated so that the tip link straight portion 51b approaches the intermediate link inclined portion 41a. At this time, the tip link 50 is rotated in a direction in which the sling attachment portion 57 moves to the inner side Y1 in the crawler lateral direction. For example, as shown in FIG. 10, the tip link 50 is rotated until the tip link linear portion 51b is arranged to extend in the vertical direction Z or substantially the vertical direction Z, for example. As a result, the suspension link 25 will be in the retracted state. A trajectory T of the center position of the suspension attachment portion 57 when the suspension link 25 changes from the intermediate state to the retracted state is indicated by a one-dot chain line in FIG.

(storage state)
As shown in FIG. 10, when the suspension links 25 are retracted, the suspension links 25 (more specifically the intermediate links 40 and the tip links 50) are retracted. The suspension link 25 can be in the retracted state at times other than when the crawler frame 21 is lifted. When the suspension link 25 is in the retracted state, the intermediate link 40 and the tip link 50 are folded. The suspension link 25 in the stored state may be attached to the crawler frame 21 , that is, stored in the crawler frame 21 . The suspended link 25 in the retracted state may be removed from the crawler frame 21 . Here, a case where the suspension link 25 in the retracted state is attached to the crawler frame 21 will be described. The suspended link 25 in the retracted state is in the following state.

In the retracted state, the upper Z1 end of the leading end link 50 is arranged on the lower Z2 side than the upper Z1 end (upper surface) of the crawler belt 23 (see FIGS. 9 and 10). At this time, the tip link 50 does not protrude from the upper surface of the crawler belt 23 to the upper side Z1. In this case, even if the upper revolving body 11 revolves with respect to the lower traveling body 13 shown in FIG.

In the example shown in FIG. 10, the tip link body portion 51 (more specifically, the tip link linear portion 51b) is arranged to extend in the up-down direction Z or substantially in the up-down direction Z. As shown in FIG. In this case, for example, compared to the case where the upper side Z1 is arranged on the outer side Y2 in the crawler lateral direction (see FIG. 9), an object (obstacle ) and the suspension link 25 is suppressed.

As shown in FIG. 10, in the retracted state, the end of the suspension link 25 on the outer side Y2 in the crawler lateral direction may be arranged on the inner side Y1 in the crawler lateral direction than the end of the crawler belt 23 on the outer side Y2 in the crawler lateral direction ( See the crawler belt 23 indicated by a two-dot chain line in FIG. 10). In this case, when the crawler 20 travels, interference between an object (obstacle) located on the outer side Y2 in the crawler lateral direction of the crawler 20 and the suspension link 25 is suppressed. For example, in the retracted state, the outer Yo end of the suspension link 25 in the lateral direction of the traveling body may be arranged on the inner Yi side in the lateral direction of the traveling body than the outer Yo end of the crawler belt 23 in the lateral direction of the traveling body. In this case, when the crawler 20 travels, interference between an object (obstacle) located outside Yo of the traveling body in the lateral direction of the crawler 20 and the suspension link 25 is suppressed.

In the retracted state, the intermediate link storage section 65 may restrict rotation of the intermediate link 40 with respect to the crawler frame 21 . Specifically, for example, the fifth pin 65p may be attached to the crawler-side fifth pin hole 65a (see FIG. 5) and the intermediate link-side fifth pin hole 65b (see FIG. 5). In this case, the intermediate link 40 is held with respect to the crawler frame 21 .

When in the retracted state, the tip link retraction portion 66 may limit rotation of the tip link 50 relative to the intermediate link 40 . Specifically, the tip link storing connecting portion 66d may connect the tip link 50 and the intermediate link 40 by the intermediate link side sixth pin 66p1 and the tip link side sixth pin 66p2. In this case, the tip link 50 is held with respect to the intermediate link 40 .

(Hanging attachment detached state)
When the sling A (see FIG. 2) is attached to and detached from the sling attachment portion 57, the sling link 25 (more specifically, the intermediate link 40 and the tip link 50) is placed in the sling attachment/detachment state. The attachment/detachment state of the hanger may be the stored state or the intermediate state (see FIG. 9). When the sling is attached/detached, the sling attaching portion 57 is arranged on the outer side Y2 in the crawler lateral direction of the end of the outer side Y2 in the crawler lateral direction of the crawler belt 23 (see FIGS. 10 and 9). This arrangement suppresses the interference of the hoisting tool A with the crawler belt 23 when the hoisting tool A (see FIG. 2) is attached to or detached from the hoisting tool mounting portion 57 .

(Other conditions and changes of condition)
Note that the change from the stored state to the lifted state (see FIG. 5) is performed in the reverse order of the change from the lifted state to the stored state. The state of the suspension link 25 when the sling A is attached to and detached from the sling attachment portion 57 shown in FIG. , FIG. 9), but it does not have to be in the detachable state. For example, when the suspension link 25 is rotated by a means different from that of the suspension tool A (for example, manually by an operator), when the suspension link 25 is in the suspended state, The sling A may be attached and detached. Also, the procedure for changing the state of the suspension link 25 described above is an example, and the procedure can be changed in various ways.

(examination)
Consider the case where the suspension link 25 cannot be stored in the crawler frame 21 shown in FIG. As described above, the center of gravity of the crawler 20 is inside the lateral Y width of the crawler belt 23 . Therefore, in order to hoist the crawler 20 while suppressing the inclination of the crawler 20, the hoisting position (the position of the hoist attachment portion 57) is set inside the width of the crawler belt 23 in the horizontal direction Y and above the crawler belt 23 Z1. There is a need to. Therefore, when the upper revolving body 11 revolves with respect to the lower traveling body 13 , there is a possibility that the suspension link 25 and the upper revolving body 11 interfere with each other.

If the suspension link 25 cannot be stored in the crawler frame 21 , the suspension link 25 must be removed from the crawler frame 21 in order to avoid interference between the suspension link 25 and the upper rotating body 11 . When the suspension link 25 is removed from the crawler frame 21, a large space is required for storage of the suspension link 25 unless the suspension link 25 is configured to be foldable.

If the suspension link 25 cannot be stored in the crawler frame 21, it is necessary to attach and detach the suspension link 25 to and from the crawler frame 21 before and after attaching and detaching the crawler 20 to and from the traveling body main body 13a (before and after assembly and disassembly). . As a result, the work of attaching and detaching the crawler 20 to and from the traveling body main body 13a is troublesome, and the time required for this work is lengthened. As a result, the work process for assembling and disassembling the work machine 1 increases, and the cost for assembling and disassembling increases. Since the work machine 1 is provided with two crawlers 20 (right and left), it is necessary to attach and detach the suspension link 25 to and from the crawler frame 21 for each of the two crawlers 20 .

Further, if the upper revolving body 11 turns without removing the suspension link 25 from the crawler frame 21 (a state in which the removal is forgotten), the suspension link 25 and the upper revolving body 11 interfere with each other.

Moreover, when the hanging link 25 needs to be attached to and detached from the crawler frame 21, the crawler frame 21 and the crawler belt 23 and the hanging link 25 may be transported separately. In this case, the time and effort of transportation increases, and the cost of transportation (transportation expenses) increases. Further, in this case, it is assumed that the crawler frame 21 and the crawler belt 23 have been brought into the assembly site of the work machine 1 and the suspension link 25 has not been brought in (has not yet arrived). In this case, the operation of attaching the crawler 20 to the traveling body main body 13a cannot be started until the suspension link 25 is carried in.

On the other hand, in this embodiment, as shown in FIG. 10 , the suspension link 25 can be stored in the crawler frame 21 while attached to the crawler frame 21 . Therefore, it is possible to suppress the above problems when the suspension link 25 cannot be stored in the crawler frame 21 and the suspension link 25 needs to be removed from the crawler frame 21 . Further, the suspension link 25 of the present embodiment can be removed from the crawler frame 21 and placed in a state (stored state) in which the intermediate link 40 and the tip link 50 are folded. Therefore, the suspension link 25 can be made more compact than when the intermediate link 40 and the tip link 50 are not folded. Therefore, the hanging link 25 can be easily carried. In addition, a space for storing (storing) the suspension link 25 can be easily secured.

(Effect of the first invention)
[Configuration 1-1] The effects of the suspension link 25 shown in FIG. 2 are as follows. Suspension links 25 are attachable to the crawler 20 . The crawler 20 includes a crawler frame 21 and a crawler belt 23. The crawler frame 21 can be attached to the traveling body main body 13a. The crawler belt 23 is arranged around the crawler frame 21 . As shown in FIG. 5, the suspension link 25 includes an intermediate link 40 and a tip link 50. As shown in FIG.

[Construction 1-2] The intermediate link 40 can be rotatably attached to the outer surface Y2 of the crawler frame 21 in the lateral direction of the crawler. The tip link 50 is rotatably attached to the intermediate link 40 and can be attached with a sling A for hoisting the crawler frame 21 . The intermediate link 40 and the tip link 50 are configured to be able to be in a hoisted state when hoisting the crawler frame 21 and a stored state (see FIG. 10). The retracted state (see FIG. 10) is a state in which the crawler frame 21 can be in a state other than when the crawler frame 21 is lifted, and is a state in which the intermediate link 40 and the tip link 50 are folded.

In the above [Configuration 1-2], the tip link 50 shown in FIG. 5 is rotatably attached to the intermediate link 40 . Also, as shown in FIG. 10, the intermediate link 40 and the tip link 50 can be folded into a stored state. Therefore, compared to the case where the intermediate link 40 and the tip link 50 are not foldable, the hanging link 25 can be made compact when not in use.

(Effect of the second invention)
As shown in FIG. 4 , the suspension link 25 includes a front link 30 , a rear link 80 and front and rear link connecting portions 90 . The front link 30 has an intermediate link 40 and a tip link 50 . The rear link 80 is spaced apart from the front link 30 in the longitudinal direction (front-rear direction X) of the crawler frame 21 when the intermediate link 40 is attached to the crawler frame 21 . The rear link 80 has an intermediate link 40 and a leading link 50 separate from the intermediate link 40 and leading link 50 of the front link 30 .

[Configuration 2] The front-rear link connection portion 90 is connected to the front link 30 and the rear link 80 to fix the front link 30 and the rear link 80 to each other.

The front link 30 and the rear link 80 can be integrated by the front and rear link connection portion 90 of [Configuration 2]. Therefore, deformation of the front link 30 and the rear link 80 due to the force in the longitudinal direction X acting on the front link 30 and the rear link 80 can be suppressed. As a result, the strength of the suspension link 25 can be improved.

(Effect of the third invention)
[Configuration 3] As shown in FIG. 11, a plurality of front and rear link connection portions 90 are provided. When the intermediate link 40 is attached to the crawler frame 21 and the intermediate link 40 and the tip link 50 are in the retracted state, the plurality of front and rear link connecting portions 90 are spaced apart in the vertical direction Z. As shown in FIG.

According to [Configuration 3] described above, the operator can use the plurality of front and rear link connection portions 90 as ladders, scaffolds, and the like.

(Effect of the fourth invention)
[Configuration 4] The effects of the crawler 20 shown in FIG. 5 are as follows. The crawler 20 includes a suspension link 25, a crawler frame 21, and a crawler belt 23 (see [Configuration 1-1] and [Configuration 1-2] above, respectively). A suspension link 25 is attached to the crawler frame 21 . The tip link 50 has a sling attachment portion 57 to which the sling A can be attached.

[Configuration 4] can provide the crawler 20 that achieves the effects of [Configuration 1-2].

(Effect of the fifth invention)
[Construction 5-1] When the intermediate link 40 and the tip link 50 are in a suspended state, the suspension link 25 is arranged to bypass the crawler belt 23, and the suspension attachment portion 57 is arranged above the crawler belt 23 Z1. be done. In this suspended state, rotation of the intermediate link 40 with respect to the crawler frame 21 is restricted, and rotation of the tip link 50 with respect to the intermediate link 40 is restricted.

[Arrangement 5-2] As shown in FIG. 10, when the intermediate link 40 and the tip link 50 are in the retracted state, the upper Z1 end of the tip link 50 is positioned lower Z2 than the upper Z1 end of the crawler belt 23. placed.

As in the above [configuration 1], the intermediate link 40 and the tip link 50 are variable between the lifted state (see FIG. 5) and the retracted state (see FIG. 10). In the above [configuration 5-1], as shown in FIG. 5, when the intermediate link 40 and the tip link 50 are in the suspended state, the rotation of the intermediate link 40 with respect to the crawler frame 21 is restricted, Rotation of link 50 is restricted. Therefore, even if the intermediate link 40 and the tip link 50 have a variable structure between the lifted state and the retracted state, when the intermediate link 40 and the tip link 50 are in the lifted state (when the suspension link 25 is used). , the rotation of the intermediate link 40 and the tip link 50 is reliably limited. Therefore, the hoist A attached to the hoist link 25 can reliably hoist the crawler 20 .

In the above [Configuration 4], the suspension link 25 is attached to the crawler frame 21 . In the above [Configuration 5-2], as shown in FIG. 10, when the intermediate link 40 and the tip link 50 are in the retracted state, the upper Z1 end of the tip link 50 is located above the upper Z1 end of the crawler belt 23. are also arranged on the lower side Z2. Here, the structure (specifically, the upper revolving structure 11) mounted on the traveling body main body 13a (see FIG. 2) may be arranged above the crawler belt 23 (specifically, the crawler may pass through the area directly above the belt 23). Therefore, the intermediate link 40 and the tip link 50 in the retracted state and the upper rotating body 11 (see FIG. 2) do not interfere with each other. Therefore, it is not necessary to remove the suspension link 25 from the crawler frame 21 in order to prevent interference between the upper revolving body 11 and the suspension link 25 . Therefore, it is possible to eliminate the need to attach and detach the suspension link 25 to and from the crawler frame 21 .

When the suspension link 25 is not attached to and detached from the crawler frame 21, the efficiency of attaching and detaching the crawler 20 to and from the traveling body main body 13a shown in FIG. 2 can be improved, and the time required for this operation can be shortened. be able to.

Moreover, when the suspension link 25 is not attached to and detached from the crawler frame 21, the following effects may be obtained. For example, it is possible to reduce the labor and cost of storing the suspended link 25 removed from the crawler frame 21, and eliminate the need to secure a storage place for the suspended link 25. Also, for example, the crawler frame 21 and the suspension link 25 can be transported integrally. When the crawler frame 21 and the suspension link 25 are transported integrally, compared with the case of transporting them separately, it is possible to reduce the labor and cost of transportation. Further, if the crawler frame 21 and the crawler belt 23 have been brought into the work site when the crawler 20 is attached to the traveling body main body 13a, the suspension link 25 has also been carried into the work site. Therefore, as soon as the traveling body main body 13a and the crawler 20 are brought into the work site, the work of attaching the crawler 20 to the traveling body main body 13a can be started.

(Effect of the sixth invention)
[Structure 6] The tip link 50 includes a sling attachment portion 57 to which the sling A can be attached. As shown in FIG. 10 , the intermediate link 40 and the tip link 50 are configured so that they can be put into a state for attaching and detaching the sling A to and from the sling attachment portion 57 . When the intermediate link 40 and the tip link 50 are in the attachment/detachment state of the suspension attachment, the suspension attachment portion 57 is arranged on the outer side Y2 of the crawler belt 23 in the lateral direction Y2 of the crawler belt.

With the above [configuration 6], even in the state where the suspension link 25 is attached to the crawler frame 21 (the above [configuration 4]), when the hoisting tool A is attached to or detached from the hoisting tool mounting portion 57, the hoisting tool A is Interference with the crawler belt 23 can be suppressed. Therefore, attachment/detachment of the sling A to/from the sling attachment portion 57 can be easily performed.

(Effect of the seventh invention)
[Structure 7] When the intermediate link 40 and the tip link 50 are in the retracted state, the outer Yo end of the intermediate link 40 and the tip link 50 travels further than the outer Yo end of the crawler belt 23 in the lateral direction of the traveling body. It is arranged on the inner side Yi in the lateral direction of the body. (See the crawler belt 23 indicated by a two-dot chain line in FIG. 10)

With the above [configuration 7], even in the state where the suspension link 25 is attached to the crawler frame 21 (the above [configuration 4]), the obstacle on the outer side Yo of the traveling body from the crawler 20 and the suspension link 25 , can be suppressed.

(Modification)
The above embodiments may be modified in various ways. For example, the arrangement and shape of each component of the above embodiment may be changed. For example, the number of components may vary and some components may not be provided. For example, fixing, coupling, etc. between components may be direct or indirect unless otherwise specified. For example, what has been described as a plurality of different members or parts may be treated as one member or part. For example, what has been described as one member or portion may be divided into a plurality of different members or portions.

13a Traveling body main body 20 Crawler 21 Crawler frame 23 Crawler belt 25 Suspension link 30 Front link 40 Intermediate link 50 Tip link 57 Suspension attachment part 80 Rear link 90 Front and rear link connection part A Suspension attachment Y1 Crawler lateral direction inner side Y2 Crawler lateral direction outer side Yi Lateral inner side of running body Yo Lateral outer side of running body

Claims (7)

A suspension link attachable to a crawler comprising a crawler frame attachable to a traveling body and a crawler belt disposed around the crawler frame,
an intermediate link rotatably attachable to a crawler laterally outer surface of the crawler frame;
a tip link rotatably attached to the intermediate link and capable of attaching a sling for hoisting the crawler frame;
with
The intermediate link and the tip link are
a lifting state when lifting the crawler frame;
a storage state in which the crawler frame can be in a state other than when the crawler frame is lifted, and in which the intermediate link and the tip link are folded;
configured to be capable of becoming
hanging link. A suspension link according to claim 1,
a front link having the intermediate link and the tip link;
The intermediate link is spaced longitudinally with respect to the front link when attached to the crawler frame, and is separate from the intermediate link and the tip link of the front link. a rear link having an intermediate link and said leading link;
a front and rear link connection portion connected to the front link and the rear link and fixing the front link and the rear link to each other;
comprising
hanging link. A suspension link according to claim 2,
A plurality of the front and rear link connection portions are provided,
When the intermediate link is attached to the crawler frame and the intermediate link and the tip link are in the retracted state, the plurality of front and rear link connecting portions are vertically spaced apart,
hanging link. a suspension link according to any one of claims 1 to 3;
the crawler frame to which the suspension link is attached;
the crawler belt;
comprising
crawler. A crawler according to claim 4,
The tip link includes a sling attachment portion to which the sling can be attached,
When the intermediate link and the tip link are in the suspended state, the suspension link is arranged to bypass the crawler belt, the suspension attachment portion is arranged above the crawler belt, and is attached to the crawler frame. rotation of the intermediate link is restricted, rotation of the tip link relative to the intermediate link is restricted;
When the intermediate link and the tip link are in the retracted state, the upper end of the tip link is arranged below the upper end of the crawler belt.
crawler. A crawler according to claim 4 or 5,
The tip link includes a sling attachment portion to which the sling can be attached,
The intermediate link and the tip link are configured so as to be able to be put into a sling attachment/detachment state for attaching and detaching the sling to and from the sling attachment portion,
When the intermediate link and the tip link are in the attachment/detachment state of the suspension attachment, the suspension attachment portion is arranged outside in the crawler lateral direction of the outer end of the crawler belt in the crawler lateral direction.
crawler. The crawler according to any one of claims 4 to 6,
When the intermediate link and the tip link are in the retracted state, the outer ends of the intermediate link and the tip link in the lateral direction of the running body are positioned further inward in the lateral direction of the running body than the outer end of the crawler belt in the lateral direction of the running body. to be placed,
crawler.

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