Abstract: An idler wheel includes a disk shaped idler body, and a plurality of wear plate assemblies disposed to encircle a circumferential surface of the idler body. Each wear plate assembly includes a first wear plate and a second wear plate. The first and second wear plates are adjacent to each other. Each of the first and second wear plates includes a first crawler belt contact surface and a second crawler belt contact surface. Each of the first wear plates includes a first end part that defines an end on a second wear plate side of the first crawler belt contact surface as seen in a plan view, and a second end part that defines an end on the second wear plate side of the second crawler belt contact surface as seen in the plan view. The first end part is inclined with respect to an axial direction.

Abstract: A track link includes a tread surface, a shoe surface, a communicating part, and a seat formation part. The tread surface comes into contact with a roller for an undercarriage. The shoe surface is disposed on an opposite side from the tread surface. A track shoe is attachable to the shoe surface. The communicating part is disposed between the shoe and tread surfaces. The communicating part passes through the track link in a width direction that is perpendicular to a linking direction, and allows side faces of the track link to communicate in the width direction. The seat formation part is formed on a shoe surface side of the communicating part. A through-hole passes through from the shoe surface to the seat formation part, and a bolt member is disposable in the through-hole. A number track links in a loop are usable in a track of a work vehicle.

Abstract: Roller shell has a first cylindrical part and a second cylindrical part. An outer diameter of the first cylindrical part is larger than an outer diameter of the second cylindrical part, and an inner diameter of the first cylindrical part is smaller than an inner diameter of the second cylindrical part. The first cylindrical part fits to a small-diameter bushing part, and the second cylindrical part fits to a large-diameter bushing part. The second cylindrical part has a slit which extends through an outer circumferential surface and an inner circumferential surface and is open at an end surface. The roller shell engages with a step part. An engaging member fits to a groove and engages with the slit. A retainer is formed to have an annular shape and is detachably attached to bushing to hold an end surface of the roller shell.

Abstract: An idler wheel includes a disk shaped idler body, and a plurality of wear plate assemblies disposed to encircle a circumferential surface of the idler body. Each of the wear plate assemblies has an arc shaped wear plate disposed on the circumferential surface of the idler body, a first fixing member fixing the wear plate to the idler body, and a first fastening tool fastening the first fixing member to the idler body. Each wear plate has a crawler belt contact surface, a guide part protruding from the crawler belt contact surface to guide a crawler belt on the crawler belt contact surface, a first abutting surface abutting the idler body and being perpendicular to an axial direction, and a second abutting surface abutting the idler body and being perpendicular to the axial direction. The first abutting surface faces the second abutting surface in the axial direction.

Abstract: A track link includes a tread surface, a shoe surface, a communicating part, and a seat formation part. The tread surface comes into contact with a roller for an undercarriage. The shoe surface is disposed on an opposite side from the tread surface. A track shoe is attachable to the shoe surface. The communicating part is disposed between the shoe and tread surfaces. The communicating part passes through the track link in a width direction that is perpendicular to a linking direction, and allows side faces of the track link to communicate in the width direction. The seat formation part is formed on a shoe surface side of the communicating part. A through-hole passes through from the shoe surface to the seat formation part, and a bolt member is disposable in the through-hole. A number track links in a loop are usable in a track of a work vehicle.

Abstract: A roller device includes a shaft, a bushing, a roller shell, a retainer, and an elastic member. The shaft has a rotation axis. The bushing has smaller-diameter parts on both ends and a larger-diameter part arranged between the smaller-diameter parts with stepped portions interposed therebetween, and is fitted over the outer circumference of the shaft to be rotatable relative to the shaft around the rotation axis. The roller shell has a cylindrical shape, and is fitted over the outer circumference of the smaller-diameter parts of the bushing to abut on the stepped portions. The retainer is formed annularly, is fixed detachably to an end face of the bushing, and abuts on the end face of the roller shell with the elastic member interposed therebetween.

Abstract: A roller of a track-type traveling vehicle which can increase the life of a bearing supporting a roller shell is provided. The roller includes: a shaft having a cylindrical outer circumferential surface; a roller shell arranged to surround a portion of the outer circumferential surface of the shaft in a circumferential direction, and having a cylindrical inner circumferential surface which faces the outer circumferential surface, and an annular end surface; a collar fixed to the shaft and having an annular facing surface which faces the end surface; a radial sliding bearing arranged between the outer circumferential surface and the inner circumferential surface; and a thrust sliding bearing arranged between the end surface and the facing surface and provided separately from the radial sliding bearing. The roller is provided with an anti-rotation structure which prevents relative rotation of the thrust sliding bearing with respect to the roller shell.

Abstract: An idler wheel includes a disk shaped idler body, and a plurality of wear plate assemblies disposed to encircle a circumferential surface of the idler body. Each of the wear plate assemblies has an arc shaped wear plate disposed on the circumferential surface of the idler body, a first fixing member fixing the wear plate to the idler body, and a first fastening tool fastening the first fixing member to the idler body. Each wear plate has a crawler belt contact surface, a guide part protruding from the crawler belt contact surface to guide a crawler belt on the crawler belt contact surface, a first abutting surface abutting the idler body and being perpendicular to an axial direction, and a second abutting surface abutting the idler body and being perpendicular to the axial direction. The first abutting surface faces the second abutting surface in the axial direction.

Abstract: A crawler belt coupling apparatus includes a first crawler belt link, a second crawler belt link, a master pin, a locking pin, and a snap ring. The master pin is inserted in first and second through holes. The master pin is provided with an insertion hole. The locking pin is press fitted into the insertion hole, and has both ends projecting relative to the master pin. The snap ring has a C-like shape, has an outer diameter larger than the first through hole, is disposed opposite to the second crawler belt link relative to the first through hole, and is attached to the master pin. The groove has a width smaller than a diameter of the master pin. The locking pin is disposed in the groove.

Abstract: An idler wheel includes a disk shaped idler body, and a plurality of wear plate assemblies disposed to encircle a circumferential surface of the idler body. Each wear plate assembly includes a first wear plate and a second wear plate. The first and second wear plates are adjacent to each other. Each of the first and second wear plates includes a first crawler belt contact surface and a second crawler belt contact surface. Each of the first wear plates includes a first end part that defines an end on a second wear plate side of the first crawler belt contact surface as seen in a plan view, and a second end part that defines an end on the second wear plate side of the second crawler belt contact surface as seen in the plan view. The first end part is inclined with respect to an axial direction.

Abstract: A roller device includes a shaft, a bushing, a roller shell, a retainer, and a seal. The roller shell is fitted over the outer circumference of the bushing. The retainer is fixed detachably to an end of the bushing, and fitted in an end of the roller shell on a radially outer side. The seal is disposed on the outer circumference of the shaft so as to seal a gap between the shaft and the bushing. The seal includes a first seal member attached to the bushing and a second seal member attached to the shaft. The first seal member is rotatable relative to the second seal member. The second seal member has an outer circumferential end disposed on an inner side with respect to an inner circumferential end of the retainer.

Abstract: Roller shell has a first cylindrical part and a second cylindrical part. An outer diameter of the first cylindrical part is larger than an outer diameter of the second cylindrical part, and an inner diameter of the first cylindrical part is smaller than an inner diameter of the second cylindrical part. The first cylindrical part fits to a small-diameter bushing part, and the second cylindrical part fits to a large-diameter bushing part. The second cylindrical part has a slit which extends through an outer circumferential surface and an inner circumferential surface and is open at an end surface. The roller shell engages with a step part. An engaging member fits to a groove and engages with the slit. A retainer is formed to have an annular shape and is detachably attached to bushing to hold an end surface of the roller shell.

Abstract: A roller device includes a shaft, a bushing, a roller shell, a retainer, and an elastic member. The shaft has a rotation axis. The bushing has smaller-diameter parts on both ends and a larger-diameter part arranged between the smaller-diameter parts with stepped portions interposed therebetween, and is fitted over the outer circumference of the shaft to be rotatable relative to the shaft around the rotation axis. The roller shell has a cylindrical shape, and is fitted over the outer circumference of the smaller-diameter parts of the bushing to abut on the stepped portions. The retainer is formed annularly, is fixed detachably to an end face of the bushing, and abuts on the end face of the roller shell with the elastic member interposed therebetween.

Abstract: A crawler belt coupling apparatus includes a first crawler belt link, a second crawler belt link, a master pin, a locking pin, and a snap ring. The master pin is inserted in first and second through holes. The master pin is provided with an insertion hole. The locking pin is press fitted into the insertion hole, and has both ends projecting relative to the master pin. The snap ring has a C-like shape, has an outer diameter larger than the first through hole, is disposed opposite to the second crawler belt link relative to the first through hole, and is attached to the master pin. The groove has a width smaller than a diameter of the master pin. The locking pin is disposed in the groove.

Abstract: In a crawler belt coupling apparatus, a first crawler belt link has a first through hole, and a first cutout in an inner circumferential surface of a first through hole. A master pin is inserted in the first through hole of the first crawler belt link, and has a second cutout in an outer circumferential surface thereof. A first recess is constructed of the first cutout and the second cutout, and has an opening at an end portion of the first through hole. A first knock pin is disposed such that one end surface thereof faces the opening. A first snap ring has a C-like shape, and is disposed to be separated from the one end surface of the first knock pin with a space therebetween or disposed in abutment with the one end surface.

Abstract: A crawler belt link includes a center portion, one end portion located on one end side of the center portion, and the other end portion located on the other end side of the center portion. In a second surface, the center portion has a first portion of a rail surface, the one end portion has a second portion of the rail surface, and the other end portion has a third portion of the rail surface. A first outer circumferential portion reaching the second portion of the rail surface is located closer to a second side portion with respect to a bushing hole surrounding portion. Accordingly, a crawler belt link and a crawler belt apparatus can be implemented, by which wear of the rail surface above a bushing hole can be suppressed while maintaining the width of the crawler belt link to be relatively small.

Abstract: A roller of a track-type traveling vehicle which can increase the life of a bearing supporting a roller shell is provided. The roller includes: a shaft having a cylindrical outer circumferential surface; a roller shell arranged to surround a portion of the outer circumferential surface of the shaft in a circumferential direction, and having a cylindrical inner circumferential surface which faces the outer circumferential surface, and an annular end surface; a collar fixed to the shaft and having an annular facing surface which faces the end surface; a radial sliding bearing arranged between the outer circumferential surface and the inner circumferential surface; and a thrust sliding bearing arranged between the end surface and the facing surface and provided separately from the radial sliding bearing. The roller is provided with an anti-rotation structure which prevents relative rotation of the thrust sliding bearing with respect to the roller shell.

Abstract: The present wear limit determining gauge is a wear limit determining gauge to be used in determining whether or not a wear loss of a track-related component of a tracked vehicle exceeds a predetermined amount, and includes a main body formed in a plate shape, a contact surface and a wear limit determining part. The contact surface is located on an end of the main body, and makes contact with a reference surface serving as a reference in determining the wear loss of the component. The wear limit determining part is disposed on a worn side of the component while the contact surface is contacted to the reference surface, and includes first, second and third determining portions.

Abstract: A roller device includes a shaft, a bushing, a roller shell, a retainer, and a seal. The roller shell is fitted over the outer circumference of the bushing. The retainer is fixed detachably to an end of the bushing, and fitted in an end of the roller shell on a radially outer side. The seal is disposed on the outer circumference of the shaft so as to seal a gap between the shaft and the bushing. The seal includes a first seal member attached to the bushing and a second seal member attached to the shaft. The first seal member is rotatable relative to the second seal member. The second seal member has an outer circumferential end disposed on an inner side with respect to an inner circumferential end of the retainer.

Abstract: In a crawler belt coupling apparatus, a first crawler belt link has a first through hole, and a first cutout in an inner circumferential surface of a first through hole. A master pin is inserted in the first through hole of the first crawler belt link, and has a second cutout in an outer circumferential surface thereof. A first recess is constructed of the first cutout and the second cutout, and has an opening at an end portion of the first through hole. A first knock pin is disposed such that one end surface thereof faces the opening. A first snap ring has a C-like shape, and is disposed to be separated from the one end surface of the first knock pin with a space therebetween or disposed in abutment with the one end surface.