Exhibitor:
Association of Hungarian Inventors - MAFE Inventor and
Invention: NÁDAS, Béla dr: Double cardan joint |
|
1. The Invention |
|
|
Title Double
cardan joint The problem the inventor(s) wanted to solve The main aim was to create
a drive for the coupling of two shafts having different shaft angle with a
simple mechanism where the driving and driven shafts have always the same
angular velocity. Description. The double cardan joint is suitable for the coupling of two shafts
where the two shafts can have a larger shaft angle than that of the
traditional drives and, the angular velocities of the driving and the driven
shafts are always the same. Presentation. drive line the
connection of the two cardan joints in series is
evidently advantageous, since due to their co-action the angular region is
doubled and, in addition, the resulting driving movement also becomes even.
This last effect is true only if the angular deviation between the driving
and driven shafts is evenly distributed by the two cardan
joints. This requirement can be realised in a simple way only in case of
fixed position cardan joints, while in case of two cardan joints that are connected in series and where the
deviation angle between the two shafts is varying in every moment it is
required to build in an auxiliary mechanism. The characteristics
of the present solution is that the two cardan
joints are connected to each other through a double arm hinge-joint
mechanism, instead of an intermediate shaft. The arms of the hinge-joint
mechanism are embedded with bearings into the respective shafts of the two cardan crosses. This simple mechanism automatically
divides exactly in two any actual angular deviation between the shafts and,
as a result, both the driving and driven shafts have always an equal angular
velocity. An auxiliary moving frame determines the position of the crossing
point of the two axis of revolution for both the driving and driven shafts.
The mechanism can also precisely be balanced even in case of high operating
speeds with counterweights and, at the same time, it is still operating in a
deviation angle range that is twice as much as that of a single cardan joint and a more compact construction can be
built-up as that of a double cardan joint where
these are connected to each other with an intermediate shaft. Its lubrication
and maintenance requirements are modest because it is composed of the same
elements as that of a simple cardan joint. Application It can be used to replace
synchronous joints (e.g.: Rzeppa, Bendix-Weiss, etc.) in the machine and vehicle industry. Advantages It allows a higher shaft
angle range than that of the single cardan joint,
with low friction, noiseless operation and low lubrication requirement in a
way that the angular velocity of the driving and the driven shafts are the
same in any moment. Its construction is simple and, thus, it can cheaply and
easily be manufactured and dimensioned for versatile use. Stage of development. The prototype development
is in course. Documentation available: Leaflet |
2. The inventor (or inventors) |
|
|
Name(s) NÁDAS, Béla dr Self introduction. The inventor lives in Owner of the invention? Inventor |
3. Protection |
|
|
Patent Status: Form: patent application
(Reg. no.: P0203250) Priority Countries where it is in force |
4. Business
intention The inventor should like to
sell the patent rights |