192 clutches and power-stop control – Clutches – Axially engaging
Patent
1986-01-16
1988-06-28
Friedman, Carl D.
192 clutches and power-stop control
Clutches
Axially engaging
192109A, F16D 2312
Patent
active
047533315
DESCRIPTION:
BRIEF SUMMARY
The invention is concerned with a spring mechanism for a positive engagement clutch such as it has been disclosed in DE-C No. 29 49 149. In arrangements of this kind, the springs are usually integrated with the sliding sleeve or the shift fork and therefore are not very easily assembled. In another kind of assembly (according to DE-C No. 578 901), the springs are concentrically situated around the main axis of the shaft. In both cases the overall length of the springs adds to the overall axial length of the clutch itself and thus requires more overall length for the respective gearing. Moreover, after the assembly is completed, it is not possible to individually adjust the engaging forces and feed paths by setscrews or the like. The adjusting force in the solutions known already must also be maintained on the pivot shaft until effecting or releasing the engagement. Also direct disengagement (without spring action) is not provided thereby so that the driver is not given a feeling of assurance that complete disengagement has occurred.
The invention is directed to the problem of providing a spring mechanism for positive engagement clutches which can be quickly and easily engaged, simply assembled and readjusted, and with which the axial overall length of the clutch is also less affected and a direct springless disengagement is possible.
The solution of the problem consists in that the springs are now supported outside, on the periphery of the sliding sleeve, between a prestressing lever and a shift fork by a spring guide bolt. The expansion of the spring allows the end portions of a bolt to abut against the external sides of the lever and the fork, but when pressure is exerted by the lever thereby compressing the spring against the shift fork, the pressure is released only when the sliding sleeve is engaged.
Thus any additional axial overall length on the shaft, is prevented and the springs remain outside the heating zone of the sliding sleeve. Assembly and adjustment of the spring mechanism is possible without dismounting the sliding sleeve, and several parts remain unchanged and they can be used with different size sleeves, shifting forces and feed paths. In addition, disengagement is directly possible with a positive connection of prestressing lever and shift fork via the end portions of the bolt. The springs also prevent transmission of vibration from the sliding sleeve to the pivot shaft or vice-versa, and end stops do not need to be situated in the driver's compartment (mostly rubber cushioned) making allowances for other play-causing joints, etc. The spring resistance increases only briefly upon actual engagement of the stop. The shift fork and the prestressing lever can be advantageously manufactured as sheet-metal molded parts at reasonable costs.
The following advantages are obtained.
The spring prestressing in the final positions of the sliding sleeve can be reduced.
The actual actuation periods are limited to those needed for arriving at one of the stop positions.
A kinematically favorable arrangement results from a double use of the pivot shaft or the bearing thereof.
A favorable distribution of force onto the springs is obtained and a double use therefor is achieved.
A lever and stop design favorable to mass production is obtained.
The invention is explained in detail with reference to the following embodiments:
FIG. 1 shows a cross sectional view through the shaft and sliding sleeve, with the spring guides that engage the pivot ends of the shift fork, and the support of the prestressing lever on the pivot shaft of a housing wall.
FIGS. 2, 3 and 4 show in the same sideview, respectively, the prestressing lever and the shift fork behind it, according to the arrangement of FIG. 1, in the possible engaged and disengaged positions in detail and also the design of the prestressing lever and the shift fork constructed of sheet metal which reduces the weight and the expense.
FIGS. 5, 6 and 7 show diagrammatically the three operational states of the spring mechanism according to FIGS. 2, 3 and 4.
In FIG
REFERENCES:
patent: 2786560 (1957-03-01), Ishoy
patent: 3277987 (1966-10-01), Zeidler
patent: 4303151 (1981-12-01), Kolacz
patent: 4348913 (1982-09-01), Nozawa
patent: 4352418 (1982-10-01), Teraoka
patent: 4408684 (1983-10-01), Gladich
patent: 4522082 (1985-06-01), Musumiya et al.
Dietenberger Josef
Lehle Hubert
Dennison Caroline D.
Friedman Carl D.
Zahnradfabrik Friedrichshafen AG
LandOfFree
Spring mechanism on a clutch does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Spring mechanism on a clutch, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Spring mechanism on a clutch will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1910743