UA23165U - Centrifugal friction clutch - Google Patents

Abstract

A centrifugal friction clutch has driving and driven shafts, group of levers with loads and half-clutches. The half-clutches additionally have friction shoes, pressing discs installed on driving shaft by means of pin, with possibility of motion in long direction. Between those ring is installed, with arranged uniformly along the perimeter openings for fixation of tension springs, those are connected to loads of clamping disks uniformly placed along the perimeter.

Description

Description of the invention

The utility model refers to the field of mechanical engineering, in particular to devices that connect the shafts of 2 working units together.

Known designs of oddentrivy friction clutches | see Kozhevnikov S.N., Esypenko Y.I., Raskin Y.M.

Mechanism! Directory. Ed. 4th revision. and additional Ed. S.N. Kozhevnikova. M, Mashinostroenie, 1976 p. 409, fig. 6.63; Polyakov V.S., Barbash I.D., Ryakhovsky O.A. Handbook of couplings. L., Mashinostroenie, 1974 p. 298, fig. U111.6), in which rubber rings or friction pads are installed between the half-couplings, which, when rotated by 70 due to the centrifugal forces of inertia, cause joint rotation of both half-couplings. However, such couplings do not allow the driven half-coupling to be accelerated quickly and are not capable of creating large torques.

There are also well-known designs of oddentric friction clutches, see Design of mechanisms and devices.

Zablonskyi K.I., Belyaev M.S., Telis I.Ya. etc. Ed. Zablonsky K.I. Ed. Vyshcha shk., Kyiv, 1971 p. 448, fig. 4.50), the main drawback of which is the limitation of the upper limit of the rotational moment due to the impossibility 12 of using springs of high stiffness or another friction clutch, which differs both in the complexity of the design and the limitation of the upper limit of the transmitted torque | see Kozhevnikov S.N., Esypenko

Ya.I., Raskin Ya.M. The mechanism. Directory. Ed. 4th revision. and additional Ed. S.N. Kozhevnikova. M.,

Mashinostroenie, 1976 p. 410, fig. 6.60).

The technical solution closest to the claimed useful model | see Kozhevnikov S.N., Esypenko 20 Y.I., Raskin Y.M. The mechanism. Directory. Ed. 4th revision. and additional Ed. S.N. Kozhevnikova. M.,

Mechanical engineering, 1976 p. 409, fig. 6.64), which is designed to connect working shafts due to inertial forces transformed in the axial direction. The prototype mechanism consists of two pairs of lever systems that transform the centrifugal forces of inertia in the axial direction. On each pair of levers, at the place of their hinged connection, a load is installed to create a centrifugal force of inertia. 29 Systems of levers with a load are installed on two pressure discs mounted on the drive shaft, which are able to move along the axis of rotation. The driving half-coupling, which has a closed circuit in the axial section and is connected to the half-coupling on the driven shaft through the fingers, is also movably installed.

The prototype centrifugal clutch works as follows.

When the drive shaft rotates, the discs with a set of levers installed on them rotate simultaneously with it. o 30 Centrifugal forces of inertia of the loads through the levers are transformed in the longitudinal direction and press the discs Ge) to the working friction surfaces of the driving half-coupling. As a result, frictional forces arise between them and the driving half-coupling begins to rotate. The rotation from this half-clutch is transmitted to the second half-clutch through the fingers. --

Since the obtuse angle between the levers approaches 1802, the coefficient of transformation of the centrifugal force of inertia into the normal force to the connected surfaces is large, due to which the creation of large

From torques. high school

The prototype and the claimed useful model have the following common features: - presence of spring-loaded loads with levers; - presence of friction disks; "- the presence of an enclosing body. WITH

But the device according to the prototype has the following disadvantages: c - the complexity of the design of the pressure disk system; "z - increased requirements for dynamic balancing of two pressure discs; - large axial dimensions of the coupling; - impossibility of increasing the number of loads, which leads to a limitation of the upper limit of the torque on the driven half-coupling; o - weakening of the drive shaft due to the presence of a hole for the spring between the loads. (4) The purpose of simplifying the design of the gear clutch, reducing the acceleration time, and increasing the reliability of its operation and load capacity is set as the basis of the useful model.

The task is solved in a centrifugal friction clutch, which contains the driving and driven shafts, pressure (Ge) 50 discs, a group of levers with loads and half-clutches in that the half-clutches additionally have end friction pads, the pressure discs are mounted on the drive shaft with the help of a key with the possibility of movement , between them there is a sl ring with holes evenly spaced around the perimeter for securing the tension springs, which are connected to loads of pressure discs evenly spaced around the perimeter.

Centrifugal friction clutch is shown in the drawings, where: 99 Fig. 1 - centrifugal friction clutch in longitudinal section; c Fig. 2 - centrifugal friction clutch in cross section.

Centrifugal friction clutch consists of flange 1, freely mounted on drive shaft 2. End friction pad 4 is rigidly fixed on flange 1. On drive shaft 2, with the help of keys З, pressure disks 5 and 6 are installed, and between them a ring 7 is installed. disk 5 is installed with the possibility of pressure 60 on the end friction pad 4, and the other disk 6 - on another end friction pad 8, which is rigidly fixed on the flange 9. The flange 9 is installed on the driven shaft 10 with the help of a key 11. On the pressure disk 6, according around its perimeter, evenly spaced supports 12, with which levers 13 are hingedly connected. Levers 13 are hingedly connected to loads 14 and levers 15. Levers 15 are in contact with the pressure disk 5 with their free end surfaces along the self-centering groove ha", which is made on this disk. Loads 14 are connected by a spring 16 to a ring 7. Flanges 1 and 9 are rigidly connected to each other with the help of a sleeve 17 and screws 18, making up a closed semi-coupling installed on the driven shaft 10 through the key 11. The length of the levers is calculated in such a way that in the working state of the pressure discs, the angle o between the levers would always be slightly less than 1809.

Centrifugal friction clutch works as follows.

The movement from the drive shaft through the key Z is transmitted to the pressure discs 5 and 6. The pressure discs 5 and 6, rotating, lead to the rotation of the levers 13 and 15, as well as the loads 14. When the loads 14 rotate, centrifugal forces of inertia arise, which through the system of levers 13 and 15 are transformed into longitudinal forces that are uniformly located along the perimeter of the self-centering groove. The pressure disks move in opposite directions along the axis of the shaft and are pressed against the end friction pads. Frictional forces 70 arise on flanges 1 and 9, which cause them to rotate, after which the movement is transmitted to the driven shaft 10 through the key 11.

Claims (1)

The formula of the invention Centrifugal friction clutch, which contains the driving and driven shafts, pressure discs, a group of levers with loads and a half-clutch, which is distinguished by the fact that the half-clutches additionally have end friction pads, the pressure discs are mounted on the driving shaft with the help of a key with the possibility of longitudinal movement, between they set a ring with holes evenly spaced around the perimeter for fastening the tension springs, which are connected to loads of pressure discs evenly spaced around the perimeter. that 2 iv) (Se) "- (ze) p - and? name) (95) - (o) sl 60 b5