DE1273899B - Coupling between a drive shaft and a centrifugal weight carrier of a centrifugal governor for regulating the speed of internal combustion engines - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY GERMAN #M PATENT OFFICE Int. CL:

F02d

EDITORIAL

German class: 46b2-13

Number: 1273 899

File number: P 12 73 899.7-13 (B 95386)

Filing date: November 14, 1967

Opening day: July 25, 1968

The invention relates to a coupling between a drive shaft and a flyweight carrier a centrifugal governor for speed control of internal combustion engines, in which as a transmission element of the torque four symmetrically to the drive shaft in one attached to the flyweight carrier Cage arranged, axially and radially clamped and thereby axially on an end face of the flyweight carrier adjacent elastic driver elements are used.

In a known coupling of the type described (German Auslegeschrift 1 152 889) are used as transmission elements of the torque either four or two elastic driver elements, which are clamped radially, with the use of two elements these are cuboid (cuboid Leaf spring assemblies) and in the radial direction between a polygon (two-edge) of the drive shaft and corresponding surfaces of the flyweight carrier that run parallel to the polygonal surfaces are clamped and guided in the axial direction between shoulders of the drive shaft.

In another known coupling of the type described at the beginning (Swiss patent specification 214 249) serve as transfer elements of the torque from ring segment-shaped elements yielding fabric. These ring segment-shaped elements are housed in an annular space which of a cylindrical part coupled to the drive shaft and the cylindrical inner wall of one Recessed cavity is formed in the hub of the flyweight shaft. The annulus is open its one end face by a cylindrical which is permanently attached to the hub of the centrifugal weight shaft Cap closed on the outside. In this design, the standardized drive shaft end was the main focus Considered. The said cylindrical part is for this purpose on the conical, with a wedged end of the drive shaft and is secured by a nut against unwanted Loosen secured. As a result, this coupling is inaccessible and structurally relatively complicated and thus expensive. Circular segments are also difficult to manufacture in an exact fit.

In contrast, the invention is based on the object of developing a clutch that structurally can be produced easily and with little effort, which is easily accessible and in which the elastic Segments can be exchanged quickly and easily, the segments as such being cheap and can be manufactured with an exact shape.

According to the invention, this object is achieved by coupling between a drive shaft
and a flyweight carrier
a centrifugal governor for speed control
of internal combustion engines

Applicant:

Robert Bosch G. m. B. H.,

7000 Stuttgart, Breitscheidstr. 4th

Named as inventor:
Heinrich Staudt, 7145 Markgröningen;
Eberhard Hofmann, 7141 Kirchberg;
Rolf Müller, 7000 Stuttgart-Zuffenhausen

solved that the elements are cuboid and in the radial direction between a square of the drive shaft and corresponding surfaces of the cage that run parallel to this square and in axial direction between a shoulder of the drive shaft and the end face of the flyweight carrier are clamped.

An advantageous embodiment of the invention is such that the cage is known per se (Austrian patent specification 242 438) flange-shaped

formed and that he is on the face of the flyweight carrier is welded and that, likewise in a manner known per se (Austrian patent specification 242 438), the centrifugal weight carrier is mounted on a stub shaft and is preferably wise a disc spring against which the shoulder formed between the square and the stub shaft is pressed.

An embodiment of the invention is shown in the drawing and will be described in more detail below described. It shows

F i g. 1 shows a longitudinal section through a centrifugal governor with clutch and

F i g. 2 shows a section along line H-II in FIG. 1.
A camshaft 1, which is mounted in a housing 2 of a fuel injection pump, which is only indicated, protrudes with its end la into the housing, not shown, of a speed controller. Between the section 1 and the section la of this camshaft, a section Ib is provided which has a square cross-section. At the point between the square

section Ib and the section la of the camshaft formed shoulder is on the section la mounted centrifugal weight carrier 3, which on gel

809 587/112

ken 4 carries the flyweights 5. The Fliehgewichtsträger 3 is _a:, pressed plate spring 6 which is tensioned by a cross in the shaft portion la locking ring 7 on the shoulder. If a sufficient speed is reached, the flyweights 5 actuate a regulator sleeve 8 against the force of a helical spring 9 via their arms 5a Sheet metal and is attached to the flyweight carrier 3 by spot welding. The side of the cage facing the injection pump housing 2 is open. As can be seen from Fig. 2, the walls of the cage run parallel to the square surfaces of the shaft section Ib. Cuboid segments U made of elastic material are arranged between shaft section 1b and cage 10. These cuboid segments 11 are clamped on the one hand between shaft sectionlö and cage 10 ao and on the other hand between a shoulder Ic of the drive shaft and the end face of the flyweight carrier 3. Depending on the bias by the spring 6 and the hardness of the elastic segments 11, the desired damping can be predetermined. The preload and thus the effectiveness of the elastic coupling can be changed using disc springs of various thicknesses.

Claims (4)

Patent claims: 3 » 1. Coupling between a drive shaft and a flyweight carrier of a centrifugal governor for regulating the speed of internal combustion engines, in which four axially and radially clamped axially and radially clamped and axially adjacent to an end face of the flywheel carrier are used as the transmission element of the torque, arranged symmetrically to the drive shaft in a cage attached to the flyweight carrier , characterized in that the elements (11) are cuboid and in the radial direction between a square (Ib) of the drive shaft (1) and corresponding, parallel to this square (Ib) surfaces of the cage (10) and in the axial direction between a The shoulder of the drive shaft (1) and the face of the flyweight carrier (3) are clamped. 2. Coupling according to claim 1, characterized in that the cage (10) is known per se Way flange-shaped and that it is on the face of the flyweight carrier (3) is welded. 3. Coupling according to claim 1 or 2, characterized in that in a manner known per se the flyweight carrier (3) is mounted on a stub shaft (la) and is supported by a spring, preferably a plate spring (6), formed between the square (1 &) and the stub shaft (la) Shoulder is pressed. 4. Coupling according to claim 3, characterized in that the bias of the plate spring (6) can be changed and thereby the effectiveness of the flexible coupling can be influenced. Considered publications:
German Auslegeschrift No. 1152 889;
Austrian Patent No. 242,438;
Swiss patent specification No. 214 249. 1 sheet of drawings 809 587/112 7.68 © Bundesdruckerei Berlin