Power transmission system and vehicle with it
IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
UP-0567066
(2006-12-05)
|
등록번호 |
US-7798259
(2010-10-11)
|
우선권정보 |
JP-2005-351126(2005-12-05) |
발명자
/ 주소 |
- Iida, Masaru
- Ishino, Fumitoshi
- Tsukamoto, Michio
- Kawakami, Manabu
|
출원인 / 주소 |
- Kanzaki Kokyukoki Mfg. Co., Ltd.
|
대리인 / 주소 |
Sterne, Kessler, Goldstein & Fox P.L.L.C.
|
인용정보 |
피인용 횟수 :
7 인용 특허 :
6 |
초록
▼
A working vehicle comprises: a vehicle frame; a prime mover mounted on an upper surface of a first portion of the vehicle frame; a pair of left and right transaxles juxtaposed below the vehicle frame, the left and right transaxles having respective single axles so as to individually and reversibly r
A working vehicle comprises: a vehicle frame; a prime mover mounted on an upper surface of a first portion of the vehicle frame; a pair of left and right transaxles juxtaposed below the vehicle frame, the left and right transaxles having respective single axles so as to individually and reversibly rotatably driving left and right drive wheels; a working device disposed below the vehicle frame; an output shaft of the prime mover extended downward from the first portion of the vehicle frame; a traveling belt transmission disposed below the vehicle frame and extended from the output shaft to the pair of left and right transaxles; a working belt transmission disposed below the vehicle frame and extended from the output shaft to the working device; a counter shaft for the traveling belt transmission extended downward from a second portion of the vehicle frame; and a pair of upper and lower pulleys provided on the counter shaft, wherein a belt looped over the lower pulley is extended from the output shaft of the prime mover, and a belt looped over the upper pulley is extended to the left and right transaxles.
대표청구항
▼
What is claimed is: 1. A working vehicle comprising: a vehicle frame including a first portion and a second portion; a prime mover mounted at a bottom end thereof on an upper surface of the first portion of the vehicle frame, the prime mover including a vertical output shaft extended downward from
What is claimed is: 1. A working vehicle comprising: a vehicle frame including a first portion and a second portion; a prime mover mounted at a bottom end thereof on an upper surface of the first portion of the vehicle frame, the prime mover including a vertical output shaft extended downward from the bottom end of the prime mover and extended downward from the first portion of the vehicle frame; a pair of left and right drive wheels; a pair of left and right transaxles juxtaposed below the vehicle frame, the left and right transaxles having a single axle for individually and reversibly rotatably driving each of the left and right drive wheels; a working device disposed below the vehicle frame; a working belt transmission disposed below the vehicle frame and extended from the output shaft to the working device; a vertical counter shaft extended downward from the second portion of the vehicle frame; and a traveling belt transmission disposed below the vehicle frame so as to transmit power of the output shaft to the left and right transaxles, the belt transmission including: a pair of upper and lower pulleys provided on the counter shaft, a first horizontal belt looped over the lower pulley and extended from the output shaft of the prime mover, and a second horizontal belt looped over the upper pulley and extended to the left and right transaxles. 2. The working vehicle according to claim 1, wherein the first portion of the vehicle frame having the prime mover mounted thereon is lower than the second portion of the vehicle frame having the counter shaft extended downward therefrom. 3. The working vehicle according to claim 2, wherein the pair of left and right transaxles are disposed just below the second portion of the vehicle frame having the counter shaft extended downward therefrom, and wherein the vehicle frame is formed with a sloped portion between the first portion having the prime mover mounted thereon and the second portion having the counter shaft extended downward therefrom so as to correspond to shapes of the transaxles therebelow. 4. The working vehicle according to claim 1, further comprising: a clutch mechanism for transmitting or isolating power to and from the working device, wherein the clutch mechanism is provided on the output shaft of the prime mover. 5. The working vehicle according to claim 4, further comprising: a pulley provided on the output shaft of the prime mover below the first portion of the vehicle frame having the prime mover mounted thereon and above the clutch mechanism, so as to be drivingly connected to the lower pulley on the counter shaft through the belt; a transmission shaft on the downstream side of the clutch mechanism extended downward to a lower position than the clutch mechanism; and a pulley provided on the transmission shaft so as to constitute the working belt transmission. 6. A power transmission system for a working vehicle, the working vehicle including: a vehicle frame, a prime mover mounted on an upper surface of the vehicle frame, a pair of left and right transaxles juxtaposed below the vehicle frame, wherein each of the left and right transaxles has a single axle for individually and reversibly rotatably driving each of left and right drive wheels, wherein a housing of each of the transaxles is filled therein with fluid so as to serve as a fluid sump, wherein the single axle and a hydrostatic transmission for driving the corresponding single axle are disposed in each of the housings, wherein each of the hydrostatic transmission includes a hydraulic pump and a hydraulic motor fluidly connected to each other, and wherein each of the hydraulic motors has a vertical motor shaft drivingly connected to the corresponding axle and projecting upward from an upper surface of the housing, and a working device disposed below the vehicle frame, the power transmission system comprising: an output shaft of the prime mover extended downward from the vehicle frame; a traveling transmission mechanism disposed below the vehicle frame and interposed between the output shaft and the pair of left and right transaxles; a working transmission mechanism disposed below the vehicle frame and interposed between the output shaft and the working device; a cover attached on the upper surface of each of the housings so as to cover a top of the corresponding motor shaft; a brake chamber formed in the cover and each of the housings; a wet brake mechanism disposed in each of the brake chambers, wherein the brake mechanism includes a brake disk provided on the top of the motor shaft; and a fluid passage formed in a wall of each of the housings and opened to the corresponding fluid sump and the corresponding brake chamber. 7. The power transmission system for a working vehicle, according to claim 6, further comprising: a pair of reservoir tanks connected to the respective housings of the transaxles so as to regulate volumes of the respective fluid sumps in the housings, wherein the reservoir tanks are fluidly connected to the respective brake chambers. 8. The power transmission system for a working vehicle, according to claim 6, wherein the hydraulic pumps in the respective transaxles are variable displacement hydraulic pumps with respective movable swash plates, and wherein the cover serves as a guide member for the movable swash plates. 9. The power transmission system for a working vehicle, according to claim 6, wherein the hydraulic pumps in the respective transaxles are variable displacement hydraulic pumps with respective movable swash plates, further comprising: a pair of speed control levers for changing displacements of the respective hydraulic pumps, wherein each of the speed control levers is pivoted on one side of the corresponding housing; and a pair of brake levers for operating the respective brake mechanisms, wherein each of the brake levers is pivoted on the other side of the corresponding housing opposite to the corresponding speed control lever, and wherein rotary axes of the speed control levers are disposed in parallel to rotary axles of the brake levers, and the rotary axes of the speed control levers and the brake levers are disposed in parallel to the axles.
이 특허에 인용된 특허 (6)
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Abend Robert ; Ishii Norihiro,JPX ; Ohashi Ryota,JPX, Axle driving apparatus.
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Ishii Norihiro,JPX, Axle driving apparatus.
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Sakikawa,Shigenori, Axle driving apparatus.
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Irikura,Koji, Hydraulic transaxle.
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Jolliff, Norman E.; McDonner, Orville R.; Ruebusch, Richard T., Modular hydrostatic transaxle for zero turn radius mower.
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Langenfeld, Thomas J.; Roney, Matthew C.; Deters, Shane A.; Smothers, Daryl; Hauser, Raymond, Zero turn transaxle.
이 특허를 인용한 특허 (7)
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Sasahara, Kengo; Ebihara, Tomoyuki; Nakagaki, Mitsuhiro; Moriguchi, Kazuma; Matsumoto, Keiji, Electric lawn mower having a sub frame supporting transaxles and motor drivers.
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Ishii, Norihiro; Ebihara, Tomoyuki; Sasahara, Kengo; Itou, Masaya, Electric transaxle unit.
-
Sakakura, Shinya; Okazaki, Takeshi; Iwaki, Koji, Hydraulic transaxle.
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Borshov, Alex; Woodrum, Adam, Parking brake system for a lap bar controlled zero turn radius mower.
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Iwaki, Koji, Wheel motor device.
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Jordan, Barry; Komorida, Takeshi; Reichard, Maxwell, Work vehicle.
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Umemoto, Hideya; Minoura, Akira, Work vehicle.
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