RU40416U1 - ELASTIC FINGER CLUTCH OF SCUBA ENGINEER I.S. - Google Patents

Abstract

The elastic finger coupling refers to mechanical engineering and can be used to transmit torque from the drive to the actuators

The elastic finger coupling contains the leading and driven half-couplings, consisting of flanges 1, 2 and hubs 3, 4 connected by fingers, each of which has a front part 5, in the form of a parallelepiped inscribed in the cylinder and the tail part 6, the front part 5 of the fingers is limited two transverse walls rounded along the diameter d ₀ (cylinder) and longitudinal side walls 7, 8, on which elastic elements 9 are mounted and they are located between the walls 10, 11 of the grooves of the flange 2, the longitudinal side walls 7, 8 can be parallel to the walls 10, 11 grooves, and are not parallel, the diameter d _{1 of the} rear part of the 6 fingers in the coupling may be equal to the diameter d _{0 of the} front of the 5 fingers, and may be larger than the diameter d _{0 of the} front of the 5 fingers with elastic elements mounted on it, from the side of the tail 6 the fingers of the coupling is equipped with a limiter 13 with locking screws 14.

Description

An elastic finger coupling refers to mechanical engineering and can be used to transmit torque from the drive to the actuators.

Known elastic sleeve-finger coupling type MUVP [1], containing the leading and driven half-couplings, consisting of flanges and hubs. The coupling halves are interconnected by fingers having a front conical and a tail cylindrical part. Rubber bushings of trapezoidal section are mounted on the cylindrical part. Such a clutch is used in rotary machines for transmitting torque. Its main advantage is maintainability, i.e. the ability to repair (including replacing worn bushings) without dismantling the unit and its subsequent alignment.

A significant disadvantage of sleeve-sleeve couplings is their relatively small transmitted torque. For example, when transmitting a torque of 110 kgm, the diameter of the fingers is 130 mm. Hence the inefficiently used volume and increased metal consumption of the coupling. In addition, due to the uneven distribution of transmitted loads along the perimeter of the elastic bushings, the latter wear out intensively.

Known elastic finger coupling [2], containing the leading and driven half-couplings, consisting of flanges and hubs, interconnected by fingers having a front and a tail. The front part of the fingers is made plane-parallel, in the form of a parallelepiped inscribed in the cylinder and mated to one of the half-couplings through the elastic elements located in the grooves of this half-coupling. The tail part is cylindrical and placed in the hole of the other half-coupling.

In addition, the stops can be of very different instructions: in the form of a retaining ring installed in the annular groove in the part of the hole free from the finger; in the form of a retaining ring mounted in an annular groove at the junction of the flange into the hub; in the form of a retaining ring mounted in a groove in the place farthest from the axis of rotation; in the form of an elastic curved plate; installed in an annular groove located in the finger-free part of the hole; in the form of a locking screw mounted on the outer diameter of the flange; in the form of a screw plug, etc.

The specified coupling, as well as the previous one, can be widely used in technology for transmitting torque. Its disadvantage is the design of the finger, which provides for a sharp transition from its front part, made plane-parallel, in the form of a parallelepiped inscribed in the tail cylindrical part.

When the clutch operates at the indicated junction, the highest stress concentration is formed. This can lead to the destruction of the finger, which will lead to breakage of the coupling, and therefore to a stop of the equipment.

To eliminate these drawbacks, the task was to create an elastic coupling transmitting increased torque by improving the design of the fingers.

The inventive elastic finger coupling, as well as the known one, contains leading and driven half-couplings, consisting of flanges and hubs, interconnected by fingers having a front part in the form of a parallelepiped inscribed in a cylinder, with elastic elements installed between the walls of the grooves of the flange in one of the half-couplings and a tail cylindrical part located in the holes of the flange of the other coupling half, while on the side of the tail part the finger coupling is provided with a stop.

In contrast to the known technical solution, in the inventive elastic finger coupling, the front part of the fingers is made with a variable cross-section limited by longitudinal side walls. In the cross section of the front of the finger, the longitudinal side walls may be parallel or at an angle to the adjacent walls of the groove, or at least one of the longitudinal side walls of the front of the fingers may be parallel to the adjacent wall of the groove In addition, the longitudinal side walls, in their height, can be made with curvature, and the diameter of the tail of the fingers is equal to or greater than the diameter of the front of the finger, ”with elastic elements mounted on it.

These distinctive features are inextricably linked with the technical result, namely:

- the front part of the finger, made with a variable cross section bounded by longitudinal side walls. This technical solution allows you to perform the front of the fingers, for example, thickened at the transition of the front to the tail. This strengthens the front of the fingers in the most loaded state. Also, a thickening can be on both sides of the front of the fingers, which will further strengthen it. Thus, with the same clutch, but with a thickened front part of the finger, at the base, more torque can be transmitted. In addition, the front of the fingers can be made in cross-section of various shapes, limited by the side walls of various shapes convex, concave, straight, mixed, etc .;

- in the cross section of the front of the fingers, the longitudinal side walls are parallel or at an angle to the adjacent walls of the groove, or in the cross section of at least one of the walls of the front of the fingers is parallel to the adjacent wall of the groove, the side walls can be made in height with curvature.

The different design and arrangement of the longitudinal side walls of the front of the fingers and the walls of the groove allows the use of elastic elements of various shapes, which makes it possible to select the coupling that is most technically demanded for a particular type of equipment for transmitting rotation, taking into account the refraction of the axis of rotation, its bending and the magnitude of the torque;

- the diameter of the tail of the fingers is equal to the diameter of the front of the fingers. This solution provides quick assembly of the coupling, as well as the replacement of elastic elements without dismantling the equipment, which is very important in operating conditions;

- the diameter of the tail of the fingers is larger than the diameter of the front of the fingers. This allows you to quickly assemble or replace the elastic elements. Convenience for carrying out the specified operations improves.

The essence of the invention is illustrated by drawings.

Figure 1 shows an elastic finger coupling

In figure 2, 3, 4, 5, 6 - various versions of the section aa

The resilient finger coupling comprises a leading and a driven coupling half. consisting of flanges 1, 2 and hubs 3, 4, interconnected by fingers. Each finger has a front part 5, in the form of a parallelepiped inscribed in the cylinder and the tail part 6. The front part 5 of the fingers is bounded by two transverse walls rounded along the diameter d ₀ (cylinder) and longitudinal side walls 7, 8 on which elastic elements 9 are mounted and they are located between the walls 10, 11 of the grooves of the flange 2. At the same time, the front part 5 of the fingers is made with a variable cross section (Fig.2, 3, 4, 5, 6). The longitudinal side walls 7, 8 of the cross section, can be either parallel to the walls 10, 11 of the groove, and not parallel. In addition, the diameter d _{1 of the} tail portion 6 of the finger in the coupling may be equal to the diameter d _{0 of the} front part of the 5 fingers, or be larger than diameter d ₀

the front part of the 5th finger, with elastic elements mounted on it. The tail cylindrical part 6 is located in the holes 12 of the flange 1. On the side of the tail 6 of the fingers, the clutch is equipped with a stop 13 with locking screws 14.

The elastic finger clutch operates as follows.

From the drive, the torque leading to the coupling half: hub 3 and flange 1 is transmitted to the rear parts of the 6 fingers, followed by transmission to the front of the 5 fingers. The front part 5 of the fingers presses, for example, the longitudinal side wall 8 on the elastic elements 9, which, in turn, press on the walls of the grooves 11 of the flange of the driven coupling half.

When the leading coupling half is rotated in the opposite direction, the longitudinal side walls 7, through the elastic elements 9, press on the walls 10 of the slots of the driven coupling half 2. During the transmission of torque, the elastic elements take on both the forces transmitted by the coupling and undesirable loads resulting from curvature , displacement and skew axis of rotation. Thus, there is a transmission of torque with compensation for errors caused by the installation and commissioning of equipment. The fingers are held in the holes by the limiter 13, the latter is fixed with screws 14.

The assembly of the coupling is carried out in this sequence.

In the case when the fingers are made so that the diameter d _{1 of} their tail portion 6 is equal to the diameter d _{0 of the} front part 5 of the fingers, the driving and driven half couplings are mounted on the shafts, after which elastic elements 9 are placed in the grooves of the flange 2 of the driven half coupling and the front part 5 the fingers are placed in the holes 12. Next, the fingers move along the holes 12 made in the leading coupling half. After exiting from the holes of the coupling half, the front part of the 5 fingers is inserted into the holes of the elastic elements 9. Having installed all the fingers with the elastic elements in the coupling halves,

push the limiter 13 and fix it by screwing the locking screws 14.

In the case when the fingers are made so that the diameter d _{1 of} their tail 6 is larger than the diameter d _{0 of the} front part 5 of the fingers, with elastic elements mounted on it, the assembly of the coupling is performed in this sequence. Install the leading and driven coupling halves on the shafts. Elastic elements 9 are worn on the front part 5 of the fingers, with their subsequent installation in the holes 12 of the flange of the driving coupling half and in the pavas of the flange of the driven coupling half. After that, a limiter is installed.

When replacing elastic elements, the coupling halves are not removed from the shafts. It is enough to loosen the screws and push the stopper back. Then remove the fingers, remove worn elastic elements from them and put on new ones. After that, the fingers are placed in their places and the limiter, as described above.

This technical solution not only solves the task - increasing the transmitted power, but also improves serviceability during the repair of the coupling with a reduction in the time spent on it.

The resilient finger coupling can be manufactured on standard equipment with a conventional tool. Easy to maintain.

With the use of polyurethane for elastic elements, it, with the same sizes as the finger one, transmits a power of 1.5-1.8 times greater, which means that the specific metal consumption in relation to the transmitted power will decrease.

The inventive coupling will take its rightful place in the range of equipment manufacturers and operators.

Claims (7)

1. An elastic finger coupling containing the leading and driven half-couplings, consisting of flanges and hubs, interconnected by fingers with a front part in the form of a parallelepiped inscribed in a cylinder with elastic elements installed between the walls of the grooves of the flange in one of the half couplings, and a tail cylindrical the part placed in the holes of the flange of the other half-coupling, while the finger coupling is provided with a limiter on the tail part, characterized in that the front part of the fingers is made with a variable cross section, ogre nichinny longitudinal side walls. 2. The elastic finger coupling according to claim 1, characterized in that in the cross section of the front of the fingers the longitudinal side walls are parallel to the adjacent walls of the groove. 3. The elastic finger coupling according to claim 1, characterized in that in the cross section of the front of the fingers the longitudinal side walls are made at an angle to the adjacent wall of the groove. 4. The elastic finger coupling according to claim 1, characterized in that in cross section at least one of the longitudinal side walls of the front of the fingers is parallel to the adjacent wall of the groove. 5. The elastic finger coupling according to claim 1, characterized in that the longitudinal side walls along their height are made with curvature. 6. An elastic finger coupling according to claims 1 to 4, characterized in that the diameter of the tail of the finger is equal to the diameter of the front of the finger. 7. An elastic finger coupling according to claims 1 to 4, characterized in that the diameter of the tail of the fingers is larger than the diameter of the front of the fingers with elastic elements.