IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0138671
(2010-01-27)
|
등록번호 |
US-8851582
(2014-10-07)
|
우선권정보 |
IT-MI2009A0462 (2009-03-24) |
국제출원번호 |
PCT/IB2010/000147
(2010-01-27)
|
§371/§102 date |
20111122
(20111122)
|
국제공개번호 |
WO2010/109277
(2010-09-30)
|
발명자
/ 주소 |
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
6 인용 특허 :
14 |
초록
▼
A track (10) for track-type vehicles is described, comprising a continuous sequence of articulated joints (12, 12′) of the hinge type, oriented according to a first axis (A-A) substantially perpendicular to the central longitudinal development axis (B-B) of the track (10). The articulated joints (12
A track (10) for track-type vehicles is described, comprising a continuous sequence of articulated joints (12, 12′) of the hinge type, oriented according to a first axis (A-A) substantially perpendicular to the central longitudinal development axis (B-B) of the track (10). The articulated joints (12, 12′), provided with pins (36, 36′), are connected to each other and maintained at a constant distance through pairs of links (14) having longitudinal development, arranged laterally and symmetrically with respect to the longitudinal central axis (B-B). Around each pin (36, 36′) a bushing (40) is mounted free to rotate with respect to the pin (36, 36′) itself and between each pin (36, 36′) and the links (14) at least one sliding bearing (44) is press-fitted. The geometric/size characteristics of the links (14) and of the sliding bearings (44) make it possible to improve the stability and the resistance to fatigue and wearing of the articulated joints (12, 12′) of the track (10).
대표청구항
▼
1. Track (10) for track-type vehicles, comprising a continuous sequence of articulated joints (12, 12′) of the hinge type, and oriented according to a first axis (A-A) substantially perpendicular to the central longitudinal development axis (B-B) of the track (10), said articulated joints (12, 12′)
1. Track (10) for track-type vehicles, comprising a continuous sequence of articulated joints (12, 12′) of the hinge type, and oriented according to a first axis (A-A) substantially perpendicular to the central longitudinal development axis (B-B) of the track (10), said articulated joints (12, 12′) being connected to each other and maintained at a constant distance through pairs of links (14) having longitudinal development, arranged laterally and symmetrically with respect to said longitudinal central axis (B-B), each link (14) being provided with a first end flange (16) facing outwards of the track (10), with reference to said longitudinal central axis (B-B), and with a second end flange (18) facing inwards of the track (10), with reference to said longitudinal central axis (B-B), each link (14) being provided with a first upper surface (20) and a second lower guide surface (24), opposite with respect to said first upper surface (20), made on said first end flange (16) being a first through hole (26), oriented according to said first axis (A-A), for the non-rotatable connection of said link (14) with one of the pins (36, 36′) of said articulated joint (12, 12′), and made on said second end flange (18) being a second through hole (32), oriented according to said first axis (A-A), for the rotatable connection of said link (14) with one of said pins (36, 36′), characterized in that: the ratio R1 between the overall width L1 of said second lower guide surface (24) and the overall thickness (L2) of said first end flange (16) is comprised in the range between 1.1 and 1.3,the ratio (R2) between the overall width (Li) of said second lower guide surface (24) and the offset (L3) between the external surface of said first end flange (16) and the external edge of said second lower guide surface (24) is comprised in the range between 1.4 and 1.65, andthe ratio (R3) between the overall thickness (L2) of said first end flange (16) and the overall thickness (L4) of said second end flange (18) is comprised in the range between 1 and 1.1, andin that at least one annular-shaped sliding bearing (44) is housed inside said second through the ratio (Ro) between the length (S) and the related internal diameter (D) of said sliding bearing (44) being greater than 0.60. 2. Track (10) according to claim 1, characterized in that said ratio (R0) between the length (S) and the related internal diameter (D) of said sliding bearing (44) is greater than 0.65. 3. Track (10) according to claim 1, characterized in that said sliding bearing (44) is press-fitted between the internal circumferential surface of said second through hole (32) and the external circumferential surface of said pin (36, 36′), guaranteeing the free rotation around said first axis (A-A) thereof. 4. Track (10) according to claim 1, characterized in that mounted around said pin (36, 36′), and coaxially with respect thereto, is a bushing (40) free to rotate with respect to said pin (36, 36′). 5. Track (10) according to claim 4, characterized in that two sealing groups (46, 46′) are provided on each side of said sliding bearings (44), said sealing groups (46, 46′) being intended to cooperate with said bushing (40), said links (14) and said sliding bearings (44) to provide a sealing system for the articulated joints (12, 12′). 6. Track (10) according to claim 5, characterized in that a first of said sealing groups (46) is housed inside an annular groove (30) facing inwards of the track (10), with reference to said longitudinal central axis (B-B), obtained at said first through hole (26). 7. Track (10) according to claim 6, characterized in that a second of said sealing groups (46′) is interposed between said sliding bearing (44) and said rotating bushing (40), and it is housed inside said second through hole (32). 8. Track (10) according claim 1, characterized in that the non-rotatable connection of said link (14) with said pin (36, 36′) is obtained by means of a ring (42) of the “Seeger” type, integrally joined with said pin (36, 36′) and housed inside an annular groove (28) facing outwards of the track (10), with reference to said longitudinal central axis (B-B), obtained on said first end flange (16) at said first through hole (26), said ring (42) providing the locking in position between said first end flange (16) and the end of said pin (36, 36′). 9. Track (10) according to claim 1, characterized in that said sliding bearing (44) is press-fitted between the internal circumferential surface of said second through hole (32) and the external circumferential surface of said pin (36, 36′), guaranteeing the free rotation around said first axis (A-A) thereof. 10. Track (10) for track-type vehicles, comprising a continuous sequence of articulated joints (12, 12′) of the hinge type, and comprising pins (36, 36′) oriented according to a first axis (A-A) substantially perpendicular to the central longitudinal development axis (B-B) of the track (10), said articulated joints (12, 12′) being connected to each other and maintained at a constant distance through pairs of links (14) having longitudinal development, arranged laterally and symmetrically with respect to said longitudinal central axis (B-B), each link (14) being provided with a first end flange (16) facing outwards of the track (10), with reference to said longitudinal central axis (B-B), and with a second end flange (1.8) facing inwards of the track (10), with reference to said longitudinal central axis (B-B), each link (14) being provided with a first upper surface (20) and a second lower guide surface (24), opposite with respect to said first upper surface (20), made on said first end flange (16) being a first through hole (26), oriented according to said first axis (A-A), for the non-rotatable connection of said link (14) with one of the pins (36, 36′) of said articulated joint (12, 12′), and made on said second end flange (18) being a second through hole (32), oriented according to said first axis (A-A), for the rotatable connection of said link (14) with one of said pins (36, 36′), characterized in that: the ratio (R1) between the overall width (L1) of said second lower guide surface (24) and the overall thickness (L2) of said first end flange (16) is comprised in the range between 1.1 and 1.3,the ratio (R2) between the overall width (L1) of said second lower guide surface (24) and the offset (L3) between the external surface of said first end flange (16) and the external edge of said second lower guide surface (24) is comprised in the range between 1.4 and 1.65, and the ratio (R3) between the overall thickness (L2) of said first end flange (1.6) and the overall thickness (L4) of said second end flange (18) is comprised in the range between 1 and 1.1 in that at least one annular-shaped sliding bearing (44) is housed inside said second through hole (32) of each link (14), the ratio (Ro) between the length (S) and the related internal diameter (D) of said sliding bearing (44) being greater than 0.60 wherein a non-rotatable connection of said link (14) with said pin (36, 36′) is obtained by means of a ring (42) of the “Seeger” type, integrally joined with said pin (36, 36′) and housed inside an annular groove (28) facing outwards of the track (10), with reference to said longitudinal central axis (B-B), obtained on said first end flange (16) at said first through hole (26), said ring (42) providing the locking in position between said first end flange (16) and the end of said pin (36, 36′).
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