This invention relates to a selector device for adjusting pedal travel to operate
tractor in single/ dual clutch.
BACKGROUND AND PRIOR ART OF THE INVENTION QWX'Q'!!
In tractors, clutch is used to temporarily disconnect the power from engine
flywheel to transmission & PTO shaft as and when required. This is operated
by adjustment of the bolt and maintains the proper distance by any tool or key
& rotation of the complete assembly. Many tractors have Dual Clutch. If pedal
is pressed to a particular limit, the power transfer to drive wheels is
disconnected but PTO shaft still receives drive from engine. This condition is
called Single Clutch Condition. In case, pedal is pressed further down, the
drive to PTO shaft is also disconnected. This condition is called Dual Clutch
Condition. In field operations, the Single Clutch Condition is used frequently
e.g. while taking turns in field. The pedal travel limit for single clutch operation
depends upon clutch & linkage dimensions. But while operating clutch, it is
difficult to judge this limit accurately every time.
Therefore, it is required to provide selector device which is adjusted by operator
and can maintain pedal travel to singleldual clutch limit.
OBJECTS OF THE INVENTION
The primary object of the present invention is to provide a selector device for
manual adjustment of pedal travel.
Another object of the present invention is to provide a selector device for
operating tractor in single or dual clutch by maintaining the pedal travel to a
particular limit.
Further object of the present invention is to provide a selector device for
adjusting pedal travel to operate tractor in single or dual clutch which is
efficient and reliable.
SUMMARY OF THE INVENTION
According to this invention, there is provided a selector device for adjusting
pedal travel to operate tractor in singleldual clutch comprising of a bolt,
tightening of which to a particular limit for adjustment of the clutch pedal
travel to desired limit for operating the tractor in single clutch and a stopper for
operating the tractor in dual clutch.
BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWINGS
Further objects and advantages of this invention will be more apparent from I
the ensuing description when read in conjunction with the accompanying
drawings and wherein:
Fig. 1A and 1B shows: currently available layout of clutch and transmission.
Fig. 1 shows: selector mechanism according to the present invention.
Fig. 2 shows: final position of pedal after adjustment of bolt.
Fig. 3 shows: operation of tractor in single clutch.
Fig. 4 shows: operation of tractor in double clutch.
DETAILED DESCRIPTION OF THE INVENTION WITH REFERENCE TO THE
ACCOMPAWNG DRAWINGS
This invention discloses a selector device for adjusting pedal travel to operate
tractor in single or dual clutch.
Now, reference may be made to the currently available layout of clutch and
transmission (fig. 1A and 1B). This is provided with dual clutch, one for
transmission and another one for disengagement of PTO together with gear box
(8 + 2).
. ., -.
Total linkage length for rotation stopping of liver A for complete disengagement
of transmission clutch and starting of disengagement of the IT0 clutch is
101.5mm.
To reduce the length for rotation and also to address the drawbacks mentioned
in the prior art, the present invention has been introduced.
'fhe instant invention is directed to a selector device for adjustment of the
clutch pedal travel to desired limit by tightening the bolt, wherein the
adjustment is carried out for operating tractor in single or dual clutch.
Now, reference may be made to fig. 1, 2 and 3. Fig. 1 indicates adjustment bolt
(B), stopper plate (S), clutch pedal at initial position (C) and running board (R).
Fig. 2 indicates clutch pedal (C) at final position and proper adjustment (P) for
single clutch operation. The selector mechanism is subjected to a clutch pedal
travel adjustment by tightening the bolt at approximately 15 mm. This can
restrict the pedal travel to the desired limit and it can be operated as single
clutch.
The bolt (B) is indicated in fig. 3, rotation length of which is required to be
adjusted for single clutch operation.
Now, referring to fig. 4, in which stopper (S) is required to be pulled up for
double clutch operation.
For accurate adjustment of proper disengagement of transmission clutch, the
bolt: is required to be adjusted as per different requirement of different tractor.

WE CLAIM:-
1. A selector device for adjusting pedal travel to operate tractor in
singleldual clutch comprising of a bolt, tightening of which to a
particular limit for adjustment of the clutch pedal travel to desired limit
for operating the tractor in single clutch and a stopper for operating the
tractor in dual clutch.
2. A selector device as claimed in claim 1, wherein the bolt is tightened at
approximately 15mm to operate the tractor in single clutch.
3. A selector device as claimed in claim 1 or 2, wherein stopper is provided,
which is pulled up for operating tractor in dual clutch.
4. A selector device as claimed in any of the preceding claims, wherein for
accurate adjustment of proper disengagement of transmission clutch, the
bolt is required to be adjusted as per different requirement of different
tractor.
5. A selector device as claimed in any of the preceding claims, wherein the
dual clutch is not disengaged in any circumstances when the stopper is
applied for providing comfort to operator while driving.
6. A selector device for adjusting pedal travel to operate tractor in
singleldual clutch substantially as herein described with reference to the
accompanying drawings.