RU161606U1 - MOTOR DRIVE DISCONNECTORS - Google Patents

Abstract

A motor drive of current disconnectors comprising: a housing, an electric motor with a gearbox, a coupling, a slider-carriage, and, on the slider-carriage, brackets with plugs of connecting connectors are installed, the sockets of which are fixed in brackets on the housing supports, characterized in that the worm-mounted housing includes: angular gearbox with input shaft and output shaft, on which the cam-disk coupling is mounted, two side, two intermediate walls on which four guides and a ball screw are rigidly fixed a transmission, the main part of which is made in the form of a shaft, on the thread of which a movable nut is installed, and the ends of the shaft are installed in the bearings of the housing in bearings rigidly connected to the intermediate walls, moreover, from the motor side, an angular contact bearing is mounted on the shaft, and the shaft end is connected by cam-disk clutch with the output shaft of the angular worm gear, which is rigidly mounted on an additional support mounted on the intermediate wall, where on the inner surfaces of the side and intermediate st housing housing in the corners, angular prisms are rigidly mounted, and a slide-carriage mounted rigidly connected to a movable ball screw nut with rails rigidly fixed to the slide-carriage, on which brackets with plugs of connecting connectors are rigidly fixed, and sockets the connecting connectors are fixed by means of floating bushes in brackets on the housing supports, on which two microswitches are installed, and on the front face wall there is a counter for the number of switching plugs and po etok unite

Description

The proposed utility model relates to mechanical engineering and is intended to connect means of special technical purpose (SSTN) by means of motor drives in operating modes: “control” or “main”. The utility model is aimed at improving the motor drives of current disconnectors used in various industries of automated production.

Known screw motor drive comprising a housing, an electric motor associated with a screw of a screw pair, a rocker mechanism, the slider of which is kinematically connected with the guides inside the housing and has an internal cavity in which the nut of the screw pair is placed, and two rods are fixed on the outside, each of which consists of two parts of different diameters (RF patent No. 2113646, IPC F16K 31/00, published on 06/20/1998)

Another analogue of the claimed utility model is a motor drive of current disconnectors comprising a housing, an electric motor, a rocker mechanism connected to the electric motor by means of a clutch and a planetary gear, with an output shaft connected via a crank to the rocker, consisting of two arcuate guides connected to the shaft of the current disconnectors (RF patent No. 2,337,261 IPC F16 25/06 published on 10/27/2008)

The disadvantage of these devices is the low speed of their work, as well as the lack of the ability to switch CCTS in the control and main modes of operation.

The closest analogue of the claimed utility model is a motor drive of current disconnectors comprising: a housing, an electric motor with a planetary gearbox, a clutch and a rocker mechanism made as a crank-slide, the connecting rod of which is pivotally connected at one end to the crank of the fork, and the other to the slide-carriage, which can be returned - translational movement along two guides rigidly fixed to the walls of the housing, and, on the slide-carriage, brackets with plugs of connectors are installed, socket and which are fixed in brackets on the supports of the housing, providing the connection of the control and main operating modes of special technical equipment, where the plugs and sockets of the connecting connectors are mounted in the brackets movably, and on the supports of the opposite walls of the housing are installed stops restricting the reciprocating movement of the slide carriage and the connecting rod of the crank-slide mechanism can be made compound with the possibility of changing its linear dimensions by means of a screw-nut threaded pair "Respectively with left and right threads, the slider-carriage can be made integral, with the possibility of changing the overall dimensions along the guides by means of screw-nut threaded pairs, respectively, with the left and right threads, and the connecting rod is pivotally mounted at one end on the crank, and on the other hand, on one of the components of the slide carriage (RF patent for utility model No. 127161 IPC F16K 25/06, 31/00, published on 04/20/2013 - prototype).

The disadvantages of this device include:

- the difficulty of adjusting the time for switching operation modes and turning off the motor after switching is completed by installing cams;

- the movement of the slider - carriage is carried out according to a nonlinear law, which is explained by the principle of operation of the crank-slide mechanism;

- insufficient accuracy of connection of plugs and sockets of connectors at the initial moment of their docking;

- the possibility of using the device on mobile means is not provided;

- lack of a counter of the number of switching plugs and sockets of the connectors.

The presence of these disadvantages reduces the reliability of the device, the protection of the motor against overload, the ability to determine the number of switching this device and use on mobile devices.

The essence of the claimed utility model as a technical device is to increase the reliability of the proposed utility model, the ability to determine the number of device switches and use on mobile devices, which is achieved by:

- switching plugs and sockets of connecting connectors with a more reliable ball - screw transmission of the "screw-nut" type;

- protection of the electric motor of the slider - carriage electric drive against overloads when its mechanical stops are reached by disconnecting its power supply by microswitches located in the area where the plugs and sockets of electrical connectors are joined;

- compensation of misalignment of the connected shafts of the worm angle gear and ball screw;

- increasing the rigidity of the structure due to the installation of lateral intermediate walls of the housing, four angular prisms in the corners of the housing of the motor drive, four guides for moving the slide carriage.

The technical result is achieved by the design features of the device, which are reduced to a reduced set of essential features:

- the use of a worm gear, cam-disk clutch;

- the use of a screw-nut ball screw type in a slide-carriage electric drive;

- installation on the left and right side supports of the housing of two microswitches connected in series;

- installation in the housing of two lateral intermediate walls, four guides and corner prisms;

- installation of the counter of the number of switching plugs and sockets of the connectors;

- installation of four shock absorbers.

From the studied patent and scientific and technical information, the authors do not know the technical solution with the proposed set of features, which leads to the conclusion that the technical solution meets the criterion of a utility model - "novelty."

The technical essence of the design of the utility model is illustrated by drawings, where:

- in FIG. 1 shows the design of the DPT with the upper cover removed - top view;

- in FIG. 2 shows the design of the PDT with the side cover removed - side view;

- in FIG. 3 shows the design of the DPT - front view.

The motor drive of the current disconnectors contains (see Fig. 1): housing 1, an electric motor with an electromagnetic clutch 2, a worm angle gear 3 with input 4 (see Fig. 1, view B) and output 5 (see Fig. 1, view B) shafts, ball screw 6, cam-disk clutch 7.

The electric motor 2 is connected to the input shaft 4 of the worm bevel gear 3 by a sleeve 8 (see Fig. 1, view B).

The housing 1 includes side walls 9, 10, a base 11 (see FIG. 2), a top cover 12, a rear 13, a front 14 and two intermediate walls 15, 16, on which four guides 17 are rigidly fixed (see FIG. 1, Fig. 2) along which the slider-carriage 18 moves (see Fig. 1).

On the slider - carriage 18, strips 19, 20, 21, 22 are installed (see Fig. 2), and also brackets 23 with plugs 24 of the connectors are rigidly fixed (see Fig. 1). Sockets 25 are rigidly connected to the floating sleeves 26 (see Fig. 1 - view A) in the brackets 27 fixed to the supports 28 and 29 (see Fig. 1). On the free side walls of the supports 28 and 29, two microswitches 30, 32 and 31, 33 (see Fig. 2) are mounted in brackets 34, 36 and 35, 37, respectively.

Ball screw 6 (see Fig. 1) is a shaft with a thread 38 along which the movable nut 39 moves. The shaft 38 is mounted on one side in double ball angular contact bearings 40 and on the other hand in a ball radial bearing 41, installed respectively in the supports 28, 29, rigidly connected with the intermediate walls 15 and 16 of the housing 1.

The cam-disk clutch 7 (see Fig. 1) consists of two coupling halves 42, 43 (see Fig. 1 - view B) connected by an intermediate disk 44.

The reducer 3 is fixed (see Fig. 1, Fig. 2) on an additional support 45 mounted on the front side of the intermediate wall 15. On the inner surfaces of the side (see Fig. 1) 9, 10 and intermediate 15, 16 walls of the housing 1 are installed angle prisms 46.

At the base 11 (see Fig. 2) four shock absorbers 48 are fixed to the end surfaces of the angular prisms 46.

Connectors 49 are installed on the rear wall 13 (see Fig. 1, Fig. 2), through which the DCT is connected to special technical equipment.

On the front wall 14 (see. Fig. 3) is installed a counter 50 of the number of switching plugs and sockets of the connecting connectors.

The proposed device can operate in two modes: "Control" and "Basic", determined by the control system CCTS.

The electric motor has two field windings, which provide rotation of its rotor in two directions.

Any of the modes of the motor drive of the current disconnectors starts when the supply voltage (see Fig. 1) is applied to the stator winding of the electric motor 2 and to one of its field windings through one of the connectors 49. The electric motor 2, through the sleeve 8, drives the input shaft 4 (see Fig. 1, view B) of the worm angle gear 3. After reducing the speed of the input shaft 4 by gear 3, the increased torque is transmitted from its output shaft 5 (see Fig. 1, view B) to the ball screw shaft 38 through the cam -disc clutch 7 which designed to compensate for misalignment of the connected shafts, which in turn leads to increased reliability of the proposed utility model.

Ball screw 6 (see Fig. 1) converts the torque into the translational movement of the nut 39 associated with the slide-carriage 18.

The slider-carriage 18, moving along four guides 17, leads out of the connection of the plug 24 and socket 25 on one side and connects similar plugs and sockets on the opposite side, thereby switching the CCTS from the "Control" operating mode to the "Main" mode or vice versa.

Sockets 25 (see Fig. 1, view A) are installed in the brackets 27 by means of floating sleeves 26, which eliminates the effect of misalignment of the pins of the sockets 25 and the holes of the plugs 24 of the connectors and increases the reliability of their switching.

Double ball angular contact bearings 40 perceive axial in two directions and radial loads. Ball radial bearing 41 accepts radial loads.

Ball screw 6 is capable of absorbing large loads, which also increases the reliability of the DCT.

The use of four guides 17 leads to an increase in structural rigidity, as a result of which distortions obstructing the movement of the slide-carriage 18 are eliminated, which means increased resistance to external dynamic influences, and, consequently, reliability.

Increasing the rigidity of the structure is also carried out by installing angular prisms 46 and intermediate walls 15, 16.

The movement of the slide carriage in the extreme positions is stopped by pressing the strips 19, 21 (see Fig. 2) on the microswitches 30, 32 when it moves in one direction and the strips 20, 22 on the microswitches 31, 33 when it moves in the opposite direction, which turn off the power of the electric motor 2, protecting it from overloads.

The microswitches 30, 32 and 31, 33, respectively, are connected in series, which increases the reliability of disconnection, that is, the operation of any of the microswitches disables the electric motor at the end of the stroke of the slide - carriage.

The "Control" mode of the motor drive of current disconnectors begins when a supply voltage (see Fig. 1, Fig. 2) is applied to the other excitation winding of the electric motor 2 through one of the connectors 49 installed on the rear wall 13 of the housing 1. In this case, the slider - carriage 18 moves in the opposite direction. In the future, the work process is similar to the process disclosed in the "Basic" mode.

The counter 50 shows the number of switching modes CCTN and is necessary to control the number of switching plugs and sockets of the connectors, since their resource is of limited value.

The installation of shock absorbers 48 reduces the influence of dynamic loads when using the device on mobile devices, which expands the possibility of using DPT with increased vibrations.

Claims (1)

A motor drive of current disconnectors comprising: a housing, an electric motor with a gearbox, a coupling, a slider-carriage, and, on the slider-carriage, brackets with plugs of connecting connectors are installed, the sockets of which are fixed in brackets on the housing supports, characterized in that the worm-mounted housing includes: angular gearbox with input shaft and output shaft, on which the cam-disk coupling is mounted, two side, two intermediate walls on which four guides and a ball screw are rigidly fixed a transmission, the main part of which is made in the form of a shaft, on the thread of which a movable nut is installed, and the ends of the shaft are installed in the bearings of the housing in bearings rigidly connected to the intermediate walls, moreover, from the motor side, an angular contact bearing is mounted on the shaft, and the shaft end is connected by cam-disk clutch with the output shaft of the angular worm gear, which is rigidly mounted on an additional support mounted on the intermediate wall, where on the inner surfaces of the side and intermediate st housing housing in the corners, angular prisms are rigidly mounted, and a slide-carriage mounted rigidly connected to a movable ball screw nut with rails rigidly fixed to the slide-carriage, on which brackets with plugs of connecting connectors are rigidly fixed, and sockets the connecting connectors are fixed by means of floating bushes in brackets on the housing supports, on which two microswitches are installed, and on the front face wall there is a counter for the number of switching plugs and po etok connectors, and four shock absorber mounted on the base.

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