Transmission mechanism for a working vehicle
First Claim
1. A transmission mechanism for a working vehicle, provided with an input shaft, comprising:
- a traveling system transmission shaft which is hollow and is disposed coaxially of said input shaft and allows said input shaft to perforate said transmission shaft;
a PTO system transmission shaft disposed coaxially with said input shaft and connected in a driving manner to said input shaft projecting from the interior of said traveling system transmission shaft; and
an auxiliary speed change device constructed between said input shaft and said traveling system transmission shaft.
2 Assignments
0 Petitions
Accused Products
Abstract
A transmission mechanism having a PTO transmission system and a traveling transmission system and used for a working vehicle, which is so constructed that a input shaft 8 is coaxially freely perforated through a hollow traveling clutch shaft 13, both ends of input shaft 8 projects from the traveling clutch shaft 13, one projecting portion is journalled between a bearing wall 1b of a front transmission casing 1 and a front bearing plate 4 for covering an opening at the front end of the wall 1b, and a selecting device A including a forward and rearward movement switching clutch B, as an embodiment of an auxiliary speed change device, is disposed at this projecting portion. At the front bearing plate 4 is formed an oil relaying unit 4a in which an oil passage for the forward and rearward movement switching clutch B is bored, so that an oil passage bored in a thick portion 1d of the outer wall connects through a hydraulic control valve unit 35 attached to the outer wall of the front transmission casing 1 with the oil passage of oil relaying unit 4a without need of piping. Meanwhile, a PTO clutch 9 is coaxially disposed with the input shaft 8 sequentially to the projection thereof, between the input shaft 8 and the PTO clutch shaft 9 is disposed a PTO assembly of combination of a hydraulic PTO clutch D and hydraulic PTO brake E, an annular groove 53c is formed on the outer peripheral surface, a rear surface portion of the drum 53 is rotatably mounted to a bearing wall 2a of the rear transmission casing 2, and abutting portion 53e is formed on the inner periphery of the brake drum 53 and made possible to abut against a stopper pin 61 projecting into a recess 2f at the bearing wall 2, thereby allowing the idling of brake drum 53 in a predetermined angle with respect to the bearing wall 2a.
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Citations
17 Claims
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1. A transmission mechanism for a working vehicle, provided with an input shaft, comprising:
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a traveling system transmission shaft which is hollow and is disposed coaxially of said input shaft and allows said input shaft to perforate said transmission shaft; a PTO system transmission shaft disposed coaxially with said input shaft and connected in a driving manner to said input shaft projecting from the interior of said traveling system transmission shaft; and an auxiliary speed change device constructed between said input shaft and said traveling system transmission shaft. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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Specification