JP3520152B2 - Structure of connecting part of power transmission chain in crawler traveling body - Google Patents

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a crawler traveling body.
The present invention relates to a chain used for power transmission .

[0002]

2. Description of the Related Art As a general chain, a plurality of offset links formed by a pair of left and right link plates,
Some of them are connected to each other linearly or annularly by press-fitting a support shaft pin. In addition, a first link formed by press-fitting the left and right ends of the pair of spindle pins into the front and rear ends of the pair of link plates, and a space that can be inserted between the link plates of the first link And a second link body formed by press-fitting a pair of front and rear cylindrical bushes on both front and rear ends of the pair of link plates,
Some of these first and second link bodies are alternately connected by inserting a support shaft pin into a bush. When connecting the chain in an annular shape, so-called joint links are provided at both ends of the chain. The support shaft pins are inserted in the axial direction, and the split pins are used to prevent them from coming off.

These chains are wound between sprockets of a mechanical device and used for power transmission, or metal or elastic track plates are attached to links with bolts or the like.
An endless elastic track is provided on the outer peripheral surface of the chain and is used as a traveling device (crawler) for construction machinery and agricultural machinery.

[0004]

By the way, in this type of chain, it is necessary to replace a part of the chain or change the length thereof due to, for example, elongation or damage of the chain. May occur. In such a case, since the spindle pin and bush are press-fitted into the link plate as described above, a tool and a special device to release the press-fitting are required, and also when removing the joint link. However, a tool for removing the split pin that prevents the spindle pin from coming off is required, and such work is difficult and time-consuming. Also, chain connection (assembly)
Even at the stage, the work of press-fitting, assembling the split pins, etc. similarly requires tools, devices, and a great number of man-hours, which causes an increase in manufacturing cost.

In the case of being used for power transmission by being wound between sprockets of a mechanical device or the like, a shaft of a joint link is axially inserted into both ends of the chain while winding a linear chain around the sprockets. And then connect,
When removing the chain, the support pin of the joint link is pulled out in the axial direction. Therefore, a space for inserting the support shaft pin of the joint link in the axial direction thereof, a space for extracting the space, a space for inserting a tool, and the like are required, and in a device or the like in which such space cannot be sufficiently provided. Assembly and removal work became more difficult.

[0006] Therefore, an object of the present invention is to provide a chain which can be assembled, replaced, and adjusted in length easily and quickly.

[0007]

The present invention has taken the following technical means in order to achieve the above object. That is,
Engagement portion 5 is formed at the end portion of one of the adjacent link bodies 2 connected to each other, which faces the other side, and the engagement portion 5 can be engaged at the end portion that faces the other one side. Engaged part 1
0, the engaged portion 10 has a wide portion and a narrow portion in its outer shape, and is provided so as to project from the side surface of the other link body 2. A pivotal support portion which is formed in a circular concave shape or a circular hole shape having substantially the same diameter as the wide portion of the engaged portion 10 on the side surface of the one link body 2 so that the engaged portion 10 can be inserted and can be rotatably supported. 7 is wider than the narrow portion of the engaged portion 10 and can pass through the narrow portion, and is narrower than the wide portion of the engaged portion 10 and cannot pass through the wide portion, A notch 6 which is formed so as to communicate from the pivot portion 7 to the outer peripheral surface of the one link body 2 and allows the engaged portion 10 to be inserted into and removed from the pivot portion 7 .
The notch 6 is provided outside the link body 2 from the pivot portion 7.
It is formed in the front-rear direction toward the peripheral surface,
After inserting the engaged portion 10 into the
Engage from the pivot 7 by rotating the direction about 90 °
The part 10 is configured so as not to come out through the cutout 6.
It is characterized in that it is.

According to this, the engaged portion 7 formed in the other link body 2 is inserted into the notch portion 6 of the engaging portion 5 formed in the one link body 2 from its narrow portion, Engagement part 5
It is inserted into and engaged with the pivot part 7 of. After the insertion, the wide portion of the engaged portion 10 can prevent the engaged portion 10 from coming out of the notch 6. Therefore, when assembling, exchanging, and adjusting the chain, the work can be performed easily and quickly without using tools or devices. Further, since the engaged portion 10 is engaged with the engaging portion 5 from the outer peripheral surface side of the link body 2 forming the cutout portion 6, it is possible to insert or remove a conventional spindle pin in the axial direction. Space is not required and workability is improved.

Further, the present invention is characterized in that the engaged portion 10 is formed on one end side of the link body 2 and the engaging portion 5 is formed on the other end side thereof. According to this, by connecting a plurality of the linked bodies 2 each having the engaged portion 10 and the engaging portion 5 at both ends, a chain is configured, and therefore, in adjusting the length, any portion of the chain can be easily adjusted. It can be removed and connected.

In the present invention, the link body 2 has a pair of link plates 3, and the pair of link plates 3
A support shaft pin 8 which is bridged and connected to both link plates 3 is fixed to one end side of the support shaft 10, and the engaged portion 10 is formed on the support shaft pin 8. 1
By forming 0 on the support shaft pin 8, the structure can be simplified.

Further, the notch 6 is detachably provided with a retaining member 15 for opening and closing the notch 6 so as to prevent the engaged part 10 engaged with the engaging part 5 from coming off. This is characterized in that, for example, the notch 6 is opened and closed by a retaining member 15 made of a bolt or a spacer to enable reliable connection.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 3 shows a crawler traveling body 23 used in a construction machine, an agricultural machine or the like, which is provided with the chain 1 according to the present invention, and is formed into an annular shape by connecting a plurality of link bodies 2. An elastic crawler plate 25, which constitutes the chain 1 and has a flat core material 24 coated with an elastic body such as rubber, fixes the core material 24 portion to each link body 2 by welding or the like via a mounting piece 26. Thus, the crawler traveling body 23 is configured by being attached. In addition, the elastic track plate 25
A lug 32 that is long in the crawler width direction and is substantially perpendicular to the traveling direction is provided on the ground contact surface side of the.

As shown in FIG. 1, the link body 2 is fitted in a pair of left and right link plates 3 and a fixing hole 4 formed at one of the front and rear ends of the link plate 3 to form the left and right link plates 3. And a support shaft pin 8 that connects the link plate 3 to each other. An engaged portion 10 is projected from an inner surface on one end side of the link plate 3, and a notch portion 6 is formed on the other front and rear end sides of both link plates 3.
The engaging portion 5 having is formed. Also, the link body 2
Is formed such that one end side of the pair of link plates 3 (fixed side of the support shaft pin 8) is widened in mutual distance and the other end side (portion in which the engaged portion 10 is formed) is narrowed in mutual distance. It is a so-called offset link.

The spindle pin 8 has a sprocket engaging portion 9 formed in a columnar shape at the approximate center in the axial direction,
The support shaft pin 8 between the sprocket engaging portion 9 and the inner side surfaces of the left and right link plates 3 is formed in a substantially rectangular cross section as shown in FIG. ing. The axial width of the engaged portion 10 is equal to the engaging portion 5
It is formed slightly wider than the thickness of the link plate 3 in the forming portion.

As described above, the engaged portion 10 is formed to have a substantially rectangular shape, that is, to have a wide L1 portion and a narrow L2 portion, and the wide portion of the link body 2 is formed. It is formed in a direction perpendicular to the front-back direction (longitudinal direction). On the other hand, the engaging portion 5 formed on the link plate 3
Is formed so as to penetrate the link plate 3 in the left-right direction, and has a hole having a diameter capable of rotatably inserting and supporting the wide portion L1 of the engaged portion 10 and the hole serves as the pivot portion 7. ing. The outer peripheral end of the wide L1 portion of the engaged portion 10 is
It is formed in an arc shape having substantially the same diameter as the diameter of the pivot portion 7 so that the pivot portion 7 can smoothly rotate.

As shown in FIG. 1B, the notch 6 is formed in the front-rear direction from the pivotal support 7 toward the outer peripheral surface of the link plate 3, and the notch width L3 is engaged. It is formed to be slightly wider than the narrow L2 portion so that the narrow L2 portion of the portion 10 can be passed and the wide L1 portion cannot be passed. When connecting the adjacent link bodies 2 to each other, the link plates 3 having the narrow spacing of the other link body 2 should be inserted between the link plates 3 having the wide spacing of the one link body 2. To connect.

This state will be described with reference to FIG. 2. The engagement of the other link body 2 toward the engaging portion 5 formed on the other end side of one of the adjacent link bodies 2 will be described. Joint part 1
Insert 0. At this time, the engaged portion 10 is supported from the narrow width L2 portion in a state where one link body 2 is oriented vertically with respect to the other, that is, in a state where the wide L1 portion of the engaged portion 10 is oriented laterally. The engaged portion 10 is inserted through the pivotal portion 7 through the notch 6 in the radial direction of the shaft pin 8 (see FIG. 2A).
Then, after the engaged portion 10 is inserted into the pivotally supported portion 7, the direction of one of the link bodies 2 is rotated by about 90 °, so that the engaged portion 1 from the pivotally supported portion 7 with respect to the direction in which the chain 1 continues.
0 does not come out (see FIG. 2 (b)).

Therefore, in connecting the link body 2, it is possible to connect and disconnect quickly and easily without the need of using a special tool or a device for connecting, and the link having such a structure. If the chain uses only the body, the length can be adjusted freely, and it is possible to easily replace a part of the chain. Further, as shown in FIG. 4, even when the conventional offset link 30 is connected by the support shaft pins 31 to form a chain, one end of the link body 2 has the engaging portion 5 and the other end has the engaged portion 5. By forming the joint portion 10, it is possible to easily form an annular shape of the chain, and by providing such a relationship between the engaging portion 5 and the engaged portion 10 at a plurality of points, the chain length can be increased. Is adjustable,
In addition, when exchanging, it becomes possible to exchange necessary parts.

In the above description, the engaged portion 10 is formed in a substantially rectangular shape, but it may be formed in an elliptical shape having a major axis of L1 and a minor axis of L2, or a semicircle or the like. A circular cross section may be cut out. Also, support pin 8
With regard to, it is possible to form only the cross-sectional shape of the engaged portion 8 without forming the cylindrical sprocket engaging portion 9, and the fitting portions of both ends of the spindle pin 8 into the link plate 3 are sprocket engaged. It may be formed in a cylindrical shape like the portion 9.

Further, the width L3 of the notch 6 is determined by the engaged portion 10
Although it is formed to be slightly wider than the narrow L2 portion, it is formed to be the same as or narrower than L2, and the engaged portion 10 is press-fitted into the notch portion 6 at the time of connection or disconnection, or the vicinity of the notch portion 6 is thermally contracted By doing so, the notch width L3 may be increased and the narrow width L2 portion may be passed. FIG. 5 shows another embodiment in which the chain 1 having the link body 2 as described above is used for the crawler traveling body 23.

In FIG. 1A, a crawler traveling body 23 is constructed by fixing an iron shoe 27 to the outer peripheral side of the link plate 3 of the link body 2 constituting the chain 1 with bolts and nuts 28. is there. Further, as shown by a chain double-dashed line in the figure, an elastic pad 29 made of rubber or the like can be attached to the iron shoe 27 by fixing with a bolt, and the ground surface side of the iron shoe 27 can be made of an elastic material such as rubber. May be welded and coated. The iron shoe 27 may be fixed to the link plate 3 by welding or the like instead of being fixed by bolts.

The one shown in (b) is an engaging convex portion 27a in which the top side is widened on the non-grounding surface side of the iron shoe 27.
Is formed so as to project, and the outer peripheral side of the link plate 3 (ground side)
An engaging recess 3a having a wide concave bottom is formed in the engaging recess 3a, and the engaging recess 27a of the iron shoe 27 is inserted (press-fitted) into the engaging recess 3a from the left and right sides of the link plate 3. The iron shoe 27 is attached to the link body 2 by combining them. The engaging recess may be formed on the iron shoe side and the engaging protrusion may be formed on the link plate side.
Also, a rubber crawler belt pad may be fixed to the iron shoe 27 by bolts, or an elastic material such as rubber may be welded to the ground surface side of the iron shoe 27 to cover the ground surface side.

Further, as shown in FIG. 3, the elastic shoe plate 25 is attached to the link body 2 by welding or the elastic shoe plate is fixed by bolts, and as shown in FIG. 2 has a wide top on the outer peripheral side of the link plate 3
A protruding piece 3b having a letter shape is formed, and a concave groove 25a is formed on the non-grounded surface side of the shoe plate 25 in a substantially T-shape with a wide groove bottom so that the protruding piece 3b can be engaged ( In the figure, a groove 25a is formed in the core material 24), and the protruding piece 3 of the link plate 3
Insert the concave groove 25a into b from the left and right sides (press-fit)
By engaging, the shoe plate 25 can be attached to the link body 2. In this case as well, it is possible to form a concave groove on the link plate 3 side and form a protruding piece on the core material of the shoe plate.

The one shown in FIGS. 5B and 5C can be attached to the link body 2 (link plate 3) by inserting the iron shoe 27 or the crawler plate 25 into the link body 2, so that a bolt or the like can be attached. It is possible to reduce the number of parts and improve the mounting workability without the need. In addition, as shown in FIG.
The elastic track plate 25 is formed by covering a core material 24 having a substantially V shape in a plan view with an elastic material such as rubber, and the ground surface side of the elastic track plate 25 has a substantially V shape corresponding to the core material 24. The lug 32 may be provided so as to project, and the core member 24 is fixed to the link body 2 by welding or the like, or the core member 24 is inserted into and engaged with the link plate 3 as shown in FIG. The track plate 25 can be attached.

Further, the chain 1 used in the crawler traveling body shown in FIGS. 5 and 6 has the engaging portions 5 at both ends of the link body 2.
One in which a plurality of engaged parts 10 are connected (Fig. 1
However, the engaging portion 5 and the engaged portion 10 may be formed on the opposing ends of some of the adjacent link bodies 2 (see FIG. 4). FIG. 7 shows a second embodiment of the chain according to the present invention. The difference from the first embodiment of the present embodiment is that the notch 6 formed in the link plate 3 is replaced by the pivot support 7 It is formed so as to reach the outer peripheral surface of the link plate 3 in an obliquely upward direction, and the wide L1 portion of the engaged portion 10 is formed in a direction parallel to the longitudinal direction of the link plate 3. The other configurations are similar to those of the first embodiment.

In the present embodiment, the link plate 3 is inclined, and the narrowed portion L2 of the engaged portion 10 extends from the cutout portion 6.
Is engaged with the pivot support portion 7, and after the engagement, the link plate 3 is rotated around the axis of the support shaft pin 8 so that the engaged portion 10 does not come out of the pivot support portion 7. ing. Note that the notch 6 can be formed on the upper side or the lower side of the pivotal support 7, in addition to the notch 6 being formed obliquely above the pivotal support 7 as in the present embodiment.

FIG. 8 shows a third embodiment of the present invention. In this embodiment, the lower side of the notch 6 of the left and right link plates 3 in the first embodiment is connected by a connecting portion 13. Therefore, the strength of this portion is improved. The connecting portion 13 can be provided in the vicinity of the notch 6 even if the notch 6 is formed obliquely above the link plate 3 as in the second embodiment.

FIG. 9 shows a fourth embodiment of the present invention, in which one or both of the pair of link plates 3 in the first embodiment is opened or closed with the notch 6. The detachment prevention tool 15 is provided so as to be free. The pull-out prevention tool 15 is formed of a bolt having a male screw, a hole 16 into which the bolt is inserted is formed in the upper portion of the notch 6, and a female screw 17 into which the bolt is screwed is formed in the lower portion.
Then, after connecting the link bodies 2 as shown in the first embodiment, the pull-out prevention tool 15 is inserted into the hole 16 and the female screw 17 is inserted.
The notch 6 is closed by being screwed into.
According to this, it is possible to reliably prevent the engaged portion 10 from coming off from the pivotally supported portion 7 after the connection, and it is possible to release the connection only by removing the bolt.

The hole 16 can be formed in a female screw shape. In this case, the notch 6 can be opened by screwing the bolt into the hole 16 only, so that the bolt cannot be completely removed. Both can be connected and the loss of bolts can be prevented. Further, instead of the bolts, a pin that can move up and down to open and close the notch 6 is provided, and the pin is urged in the closing direction of the notch 6 by a spring or the like. It is also possible to open 6.

Further, instead of the bolt, a spacer or the like which is detachably mounted so as to close the notch 6 may be used.
FIG. 10 shows a fifth embodiment of the present invention. A chain 1 in the present embodiment is a link having a pair of offset left and right link plates 3 and a spindle pin 8 as in the first embodiment. Although it is configured by connecting the bodies 2, the support shaft pins 8 are provided so as to connect the portions of the left and right link plates 3 where the gap is narrow, and the portions where the gap is wide. On the inner surfaces facing each other, a circular recess (pivotally supporting portion) 7 and a notch 6 which are engaging portions 5 are formed. A wide width L1 is formed on the left and right outer surface sides of the link plate on the same axis as the support shaft pin 8.
An engaged portion 10 having a substantially rectangular outer shape is provided so as to protrude, and has a narrow portion L2 and a narrow portion L2. The engaged portion 10
The projecting height is formed to be substantially the same as the depth of the recessed portion 7, and is formed such that the direction of the wide width L1 portion of the engaged portion 10 matches the longitudinal direction of the link plate 3.

On the upper and lower sides of the recess 7, recessed notches 6 which allow the narrow L2 portion of the engaged portion to pass but the wide L1 portion cannot pass and communicate with the recess 7 are formed on the outer surface of the link plate 3. It is formed over. And such an engaging portion 5
In order to connect the link bodies 2 having the engaged portions 10 to each other, the link plate 3 of one side is set in a vertical state with respect to the one link plate 3 and the notch portion 6 is formed from the narrow width L2 portion of the engaged portion 10. After inserting the engaged portion 10 into the concave portion 7 and then rotating the other link plate 3 by about 90 °, the concave portion 7 and the engaged portion 10 are engaged with each other so that the connection is performed. In addition, quick and easy connection and disconnection are possible as in the above embodiment.

In the present embodiment, the pivotal support 7 may be formed in the shape of a hole penetrating the link plate 3 instead of the shape of the recess, with the cutout 6 having the recessed shape as described above. The joint portion 10 may be formed integrally with the support shaft pin 8 so that the portion of the support shaft pin 8 where the engaged portion 10 is formed protrudes from the outer surface of the link plate 3. Also, the engaging portion 5
Is formed on the outer surface of the link plate 3 on the side of the support shaft pin 8,
The engaged portion 10 may be protruded inward from the inner surface on the opposite side.

FIG. 11 shows a sixth embodiment of the present invention. In this embodiment, the link body 2 is composed of a first link body 2A and a second link body 2B. , The second link bodies 2A and 2B are alternately connected to form the chain 1. The first link body 2A has a fifth inner surface on both front and rear end sides of the pair of left and right link plates 3A.
The circular recessed portion (pivotally supported portion) 7 as the engaging portion 5 and the recessed notch portion 6 as shown in the above embodiment are formed, and the left and right link plates 3 are connected by the connecting piece 17 at substantially the center thereof. . Further, the support shaft pins 8 are fixed to the second link body 2B at both front and rear ends of the pair of left and right link plates 3B,
A substantially rectangular engaged portion 10 is formed on the outer surface of the link plate 3B on the same axis as the support shaft pin 8 so as to project outward in the left and right directions.

Then, the second link body 2B is inserted into the recess 7 of the first link body 2A in the same manner as in the above-described embodiment.
The engaged parts 10 are engaged to be connected. In addition, also in this embodiment, the notch 6
With the above-mentioned concave shape, the pivotally supporting portion 7 may be formed in the shape of a through hole instead of the concave shape.

FIG. 12 shows a seventh embodiment of the present invention. A chain 1 of the present embodiment is provided with a link body 2 which is substantially Y-shaped in a plan view, and the fork on one end side of the link body 2 is provided. A spindle pin 8 having a substantially rectangular cross section is bridged and fixed to the portion,
On the other end side, a pivotally supporting portion 7 penetrating in the left-right direction is formed, and a notch 6 is formed at an upper portion of the pivotally supporting portion 7 to form an engaging portion 5. The forked portion of the support shaft pin 8 is the engaged portion 10, and the engaged portion 1 is the same as in the above-described embodiment.
The narrow portion of 0 is inserted into the cutout portion 6 to be connected.

When the chain 1 of the present embodiment is used for power transmission, the support shaft pin 8 is projected to the outside of the link body 2 to the left and right to form the sprocket engaging portion 9 or separately. The sprocket engaging portions 9 may be formed so as to project outward on the left and right sides of the above, and the teeth 21 of the double sprocket may be engaged with the engaging portions. The chains in the above-mentioned first to seventh embodiments can be adopted for traveling crawlers, chain transmissions of mechanical devices, fences between gate poles, etc., which are generally used, and the material thereof is used, etc. It can be made of metal, resin, wood chips, compressed pulp or the like.

[0037]

As described above in detail, according to the present invention, the engaging portion is formed at the end of one of the adjacent link bodies to be connected, which is opposed to the other side, and the other side is connected to the other side. Engaged portions that can be engaged with the engaging portions are formed at opposing end portions, and the engaged portions have a wide portion and a narrow portion in their outer shape and are provided in the other link body. It is provided to project from the side,
The engaging portion is formed on a side surface of one of the link bodies in a circular concave shape or a circular hole shape having substantially the same diameter as the wide portion of the engaged portion, and the engaged portion can be inserted and can be rotatably supported. And a pivotal branch
The width of the engaged portion is wider than the narrow portion of the engaged portion and can pass through the narrow portion, and the width of the engaged portion is narrower than the wide portion of the engaged portion and cannot pass through the wide portion. And a cutout portion that is formed so as to communicate with the outer peripheral surface of the link body and that allows the engaged portion to move in and out of the pivotal support portion, and is formed .
The cutout is directed from the pivot support to the outer peripheral surface of the link body.
Is formed in the front-rear direction, and the engaged portion is attached to the pivot portion.
After inserting it, rotate the direction of one link body by about 90 °
This allows the engaged portion to pass through the cutout portion from the pivotal support portion.
Since it is configured so as not to come off, the notch of the engaging portion formed in one link body is inserted from the narrow portion of the engaged portion formed in the other link body, and the engaged portion By rotatably inserting into and engaging with the pivot portion of the engaging portion, easy and quick work can be performed in the assembly, replacement, adjustment, etc. of the chain without using tools or devices. Even if the work space is small, the connecting and disconnecting work can be easily performed (Claim 1).

Further, according to the present invention, since the engaged portion is formed on one end side of the link body and the engaging portion is formed on the other end side, the both ends of the link body are thus respectively formed. By configuring a chain by connecting a plurality of engaged parts and engaging parts, it is possible to easily remove and connect any part of the chain when adjusting the length. (Claim 2).

According to the present invention, the link body has a pair of link plates, and at one end side of the pair of link plates, a support shaft pin that bridges and connects both link plates is fixed and Since the engaged portion is formed on the support shaft pin, the structure can be simplified (claim 3). Further, since the cutout portion is provided with a retaining device for opening and closing the notch portion so as to prevent the engaged portion engaged with the engaging portion from being disengaged, the retaining device prevents the retaining portion from being disconnected. By opening the notch and closing the notch after the connection, the retainer is prevented and reliable connection is possible (claim 4).

[Brief description of drawings]

FIG. 1 shows a chain according to a first embodiment of the present invention, where (a) is a plan view, (b) is a side view, and (c) is (a).
FIG.

FIG. 2 is a side view showing the operation of the linked body of the same chain in a connected state, (a) being before connection and (b) being after connection.

FIG. 3 is a perspective view showing a crawler traveling body that employs the chain according to the first embodiment of the present invention.

FIG. 4 shows a modification of the first embodiment of the present invention,
(A) is a plan view and (b) is a side view.

FIG. 5 is a side view showing another embodiment of the crawler traveling body that employs the chain according to the present invention.

FIG. 6 is a plan view showing another form of a crawler traveling body that employs the chain according to the present invention.

FIG. 7 is a side view showing the operation of the chain in the connected state according to the second embodiment of the present invention.

FIG. 8 shows a chain according to a third embodiment of the present invention, in which (a) is a plan sectional view and (b) is a BB arrow view of (a).

FIG. 9 is a side view of the chain according to the fourth embodiment of the present invention.

FIG. 10 shows a chain according to a fifth embodiment of the present invention, (a) is a plan view, (b) is a view on arrow CC of (a),
(C) is a DD arrow view of (a).

FIG. 11 shows a chain according to a sixth embodiment of the present invention, (a) is a plan view, (b) is a view taken along the line EE of (a),
(C) is an FF arrow line view of (a).

FIG. 12 shows a chain according to a seventh embodiment of the present invention, (a) is a plan view and (b) is a side view showing a connected state.

[Explanation of symbols]

1 chain 2 link body 3 link plates 5 Engagement part 6 notches 7 pivot branch 8 spindle pins 10 Engagement part 15 Prevention tool

─────────────────────────────────────────────────── --Continued from the front page (56) References JP-A-7-172354 (JP, A) JP-A-61-48640 (JP, A) JP-A-63-22420 (JP, A) Actual development Sho-62- 189311 (JP, U) Actual development Sho 50-18861 (JP, U) Special table 10-500193 (JP, A) International publication 95/021670 (WO, A1) (58) Fields investigated (Int.Cl. ⁷⁾ , DB name) F16G 13/00-17/00 B62D 41/00-67/00 B65G 17/00-17/48

Claims (4)

(57) [Claims] 1. An engaging portion (5) is provided at an end portion of one of the adjacent link bodies (2) to be connected, the end portion facing the other side.
And an engaged portion (10) engageable with the engaging portion (5) is formed at an end portion facing the other one side, and the engaged portion (10) is The outer shape has a wide portion and a narrow portion, and is provided so as to project from the side surface of the other link body (2), and the engagement portion (5) is provided on the side surface of the one link body (2) by the cover. A pivotal support portion (7) which is formed in a circular concave shape or a circular hole shape having substantially the same diameter as the wide portion of the engaging portion (10) and into which the engaged portion (10) can be inserted and which is rotatably supported. Engagement part (10)
Is wider than the narrow portion of the engaged portion (10) and is narrower than the wide portion of the engaged portion (10) and cannot pass through the wide portion of the engaged portion (10). are formed has been communicated formed to the outer surface of one of the link body (2) with the engaged portion (10) cut-out portion that allows in and out relative to the pivot portion (7) and (6), the The cutout (6) is a link body from the pivotal support (7).
It is formed in the front-back direction toward the outer peripheral surface of (2).
After inserting the engaged portion (10) into the pivot support portion (7),
Rotate the direction of one link body (2) by about 90 °
And the engaged portion (10) from the pivot portion (7) to the cutout portion.
(6) A structure of a connecting portion of a power transmission chain in a crawler traveling body, which is configured so as not to pass through . 2. The engagement part (10) is formed on one end side of the link body (2), and the engagement part (5) is formed on the other end side. Item 2. A structure of a connecting portion of a power transmission chain in the crawler traveling body according to Item 1. 3. The link body (2) has a pair of link plates (3), and one end side of the pair of link plates (3) is supported by both link plates (3). The crawler traveling body according to claim 1 or 2, wherein the shaft pin (8) is fixed and the support shaft pin (8) is formed with the engaged portion (10) .
Structure of the connecting part of the power transmission chain. 4. The retaining means for opening and closing the notch (6) in order to prevent the engaged part (10) engaged with the engaging part (5) from coming off the notch (6). The structure of the connection part of the power transmission chain in the crawler traveling body according to any one of claims 1 to 3, wherein a tool (15) is provided.