RU192136U1 - Small motor drive - Google Patents

Abstract

The utility model relates to the field of electrified railway transport and is aimed at improving devices designed to drive various actuators, and can be used mainly to control the disconnectors of the contact network of electrified railways. The essence of the technical solution lies in the fact that the drive small-sized engine, comprising a housing with an output shaft of the drive, designed to connect the drive element disconnect contact nets located in the housing, the motor, the output shaft of which is connected to the input shaft of the four-stage gearbox with parallel arrangement of the axes of the gears, the output rotary lever of the communication unit of which is connected by a rod with the intermediate lever of the output shaft of the drive, a stop is fixed in it to limit movement mentioned traction. The emphasis can be fixed on the cover of the casing of said gearbox. The housing is provided with a front panel, on the inside of which the mentioned stop can be fixed. The gear housing can be made of molding material Silumin. Gears, gears and bearing caps can be made of corrosion-resistant, wear-resistant steel. A useful model is achieved by the technical result, which is to ensure the strength and reliability of the drive with dimensions that do not exceed the dimensions of the existing drives of the disconnectors of contact networks of electrified railways in all climatic zones.

Description

The utility model relates to the field of electrified railway transport and is aimed at improving devices designed to drive various actuators, and can be used mainly to control the disconnectors of the contact network of electrified railways.

Known double gear drive containing a gear shift mechanism with a double drive for moving or lifting the vessel from the water to an elevated level or down from the storage location to the water. The device includes two gears for rotating a gear in the same housing or in separate adjacent housings, which can be connected to a device for rotating a cable with which at least one cable elevator is fastened. This drive is a direct drive because it does not include belts, chains or pulleys, but uses a direct interaction between two adjacent pairs of gears, each of which reduces the speed of rotation to increase power, torque and provides control over the movement of the lifting cable (patent US 6397691 , MKI B66D 1/14, F16H 37/04, publ. 04.06.2002).

The disadvantage of this drive is its large dimensions, since the shafts of the transmission elements are located one after the other in the same direction and the low range of creating maximum force on the output shaft of the drive in case of limitation of overall dimensions.

Known screw motor drive designed to actuate the disconnectors of contact networks and comprising a housing, an engine connected to a screw of a screw pair, the nut of which is placed in a slider having pins on opposite sides, some parts of which are located in the guides of the housing, and others in the grooves of the corresponding rocker connected to the drive element. It is equipped with bushings located on the trunnion parts, and the bushes interacting with the wings are made with collars on the side of the slider and their outer diameter is smaller than the outer diameter of the bushings interacting with the guides of the housing, and the grooves of the wings are closed (patent RU 2172690, B61L 5/00 , F16K 31/50, publication 2001). The disadvantages of the specified screw motor drive are:

- the movement with two parallel working scenes implies the manufacture of parts very precise with a high frequency class;

- during the back and forth motion of the backstage there are two critical positions (the so-called dead points) at which the angle of inclination to the threaded screw leading into the movement of the backstage screw is small, which leads to the need to increase the torque to start the backward movement of the backstage;

- the movement of the bracket inside the wings, and the threaded nut on the drive screw due to the large contact area also leads to large power losses on the output shaft;

- it is necessary to use a powerful (3.2 kV.) and heavy (20 kg) electric motor;

- large mass of the drive (PDV - 44 kg);

- the need for constructive refinement for different versions of the disconnectors of the contact network of electrified railways.

Known small-sized motor drive designed to actuate contact network disconnectors, comprising a housing, an engine coupled through a mechanical converter to an output drive shaft for connecting a drive element of the contact network disconnector. The engine and the mechanical converter are located in the housing, and the mechanical converter is made in the form of a gear motor connected to the output shaft of the engine by its input shaft, and a communication unit of the output shaft of the gear motor with the output shaft of the drive. The communication node of the output shaft of the gearmotor is made in the form of a rotary lever of the output shaft of the gearmotor connected by a link to the intermediate lever of the output shaft of the drive. The motor gearbox is made in the form of a four-stage gearbox with a parallel arrangement of the axes of the gears. The housing contains an electronic switch of the direction of rotation of the drive, a normally closed safety switch against unauthorized opening of the case, and a terminal strip for connecting to the electric control circuits of the drive (patent RU 2423264, IPC B61L 5/00, March 30, 2010).

The design provides a significant expansion of the range of creating maximum effort at the end of the lever of the output shaft of the drive at the moment of contact of the disconnector when it is turned on.

The disadvantages of this motor drive are:

- the occurrence of an additional inertia stroke of the coupling unit of the output shaft of the gearmotor in the form of a rotary lever of the output shaft of the gearmotor connected by a link to the intermediate lever of the output shaft of the drive, due to the large inertia of the drive elements of the contact network disconnector under load, which leads to a power failure circuit, vibrations and sparking of the contact network;

- a relatively large mass of the drive (PDM-G (V) Km 757-21 kg);

- insufficient power of the drive motor in the conditions of constant dimensions.

The problem is the need to improve the reliability and strength of the motor drive of the contacts of the disconnector of contact networks of electrified railways in all climatic zones, including in the far north and Siberia.

The technical result, which this technical solution is aimed at, is to ensure the strength and reliability of the drive with dimensions that do not exceed the dimensions of the existing drives of the disconnectors of contact networks of electrified railways in all climatic zones.

The specified technical result is achieved by the fact that in a small-sized motor drive containing a housing with an output shaft of the drive, designed to connect the drive element of the contactor disconnector, an engine located in the housing, the output shaft of which is connected to the input shaft of a four-stage gearbox with parallel arrangement of gear axles, output the rotary lever of the communication unit which is connected by a rod with the intermediate lever of the output shaft of the drive, in the housing there is a fixed stop for the ogre the movement of the said traction.

In addition, the emphasis can be fixed on the cover of the casing of said gearbox.

In addition, the housing is provided with a front panel, on the inside of which the mentioned stop can be fixed.

In addition, the gear housing can be made of molding material Silumin.

In addition, gears, gears and bearing caps can be made of corrosion-resistant, wear-resistant steel.

The utility model is illustrated by drawings.

In FIG. 1 shows a prototype view of a communication node of the output shaft of the gearbox with the output shaft of the drive;

In FIG. 2 shows an example of fixing the stop on the gear cover;

In FIG. 3 shows a view of the gearbox from the side of the cover with emphasis and thrust of the communication unit;

In FIG. 4 shows an example of a front panel of a housing with a stop fixed thereon;

In FIG. 5 shows a view of the front panel of the housing with a stop fixed to it in the direction from the gearbox;

In FIG. 6 shows the placement of the front panel in the context of the housing;

In FIG. 7 shows a view of the gearbox in section with the engine.

The small-sized motor drive contains a housing 1 with an output shaft 2 of the drive, designed to connect the drive element 3 of the contactor disconnector, located in the housing 1 of the motor 4, the output shaft 5 of which is connected to the input shaft 6 of the four-stage gearbox 7 with a parallel arrangement of the axes of the gears 8, output the pivot arm 9 of the communication unit 10 which is connected by a link 11 with an intermediate lever 12 of the output shaft 2 of the drive, a stop 13 fixed therein is placed in the housing 1 to limit the movement of the said link 11. 13 may be secured to the cover 14 of said housing 15, gearbox 7. The body 1 may be provided with side panels 16, on the inner side of which can be fixed to the abutment 13. The casing 15 gear 7 can be made of Silumin injection material. Gears 8, gears 17 and bearing caps 18 can be made of corrosion-resistant, wear-resistant steel.

Such a combination of essential features ensures the strength and reliability of the drive in all climatic zones with dimensions not exceeding the dimensions of the existing drives of disconnectors of contact networks of electrified railways.

The placement of the stop 13 restricts the movement of the rod 11 and virtually eliminates the occurrence of an additional inertia stroke of the coupling unit of the output shaft of the gearbox with the intermediate lever of the output shaft of the drive, despite the inertia of the drive elements of the contactor disconnector, an increase in the motor power 4 and, accordingly, eliminates the breakdown of the power circuit, oscillations and sparking contact network.

The housing contains an electronic switch 19 of the direction of rotation of the drive, a normally closed safety switch 20 from unauthorized opening of the housing, and a terminal block 21 for connecting to electrical circuits (not shown) of the drive control.

The device operates as follows.

To actuate the drive, the motor 4 is turned on, which drives the gearbox 7 with its output shaft 5, the output rotary lever 9 of the communication unit 10 of which the rod 11 rotates with reinforcement the intermediate lever 12 of the output shaft 2 of the drive, which converts this rotation into translational movement of the drive elements of the disconnector with horizontal output shaft or rotary movement of the disconnector shaft with vertical output shaft. The rotation of the output shaft of the drive is carried out in two plain bearings (bronze bushings), the rotation of the axes of the gearbox is carried out in rolling bearings (ball bearings).

The stop 13, limiting the inertial movement of the rod 11, operates as follows:

When the thrust 11 hits the stop 13 located on the cover of the gearbox 14, large, proportional to the power of the motor 4, peak loads with the vibration of the gears 8, gears 17, gear housing 15 arise, which causes the gearbox parts to wear quickly, namely: the cover is destroyed 14 gearbox and breaking teeth of shafts and gears. In this case, it is impossible to use a reducer with a casting casing made of Silumin material in the drive, since the gear case will be destroyed by several thrusts 11 against the stop 13.

The location of the stop 13 not on the gearbox, but on the front steel panel 16 allows to reduce the length of the rod 11, and therefore, reduce the force of impact on the stop 13.

In this case, the transfer of the stop 13 from the gearbox to the front panel 16 allows you to use a gearbox with a casing made of Silumin molding material in the drive, which reduces the weight of the gearbox and the drive by 2.5 kilograms, reduces the complexity of its manufacturing and cost by 20%, increases the manufacturing speed of the gearbox , and therefore the entire drive.

If all parts of the casing are made of steel 3, 10 and 45, which are coated with Antik silver 4 UHL polyester powder paint, this allows the drive to be used in any weather conditions for 10-15 years.

If you use a gearbox with gears 8, gears 17, bearing caps 18 made of corrosion-resistant, wear-resistant steel 08X1810T, and all other drive parts are covered with 3 layers of corrosion protection:

1 layer - galvanic zinc,

2 layer - primer - cold zinc,

3 layer - zinc paint,

then the life of the proposed drive increases to 35-40 years.

The prototype uses a 60 W motor 4, which does not allow the drive to be used in the extreme north and Siberia, since in severe frosts the moving parts of the drive freeze due to condensation, and the motor power is not enough to start the drive.

In the proposed drive with emphasis 13, a motor 4 with a power of 100 W is used, which allows the drive to be used in all climatic zones. When changing the engine from 60 W to 100 W, the overall dimensions of the motor 4 remained the same, which did not change the overall dimensions of the entire drive.

Thus, a useful model achieves the technical result, which is to ensure the strength and reliability of the drive with dimensions that do not exceed the dimensions of the existing drives of the disconnectors of contact networks of electrified railways in all climatic zones.

Claims (5)

1. Small-sized motor drive, comprising a housing with an output shaft of the drive, designed to connect the drive element of the contact network disconnector, an engine located in the housing, the output shaft of which is connected to the input shaft of a four-stage gearbox with parallel arrangement of the axes of the gears, the output pivot arm of which is connected traction with an intermediate lever of the drive output shaft, characterized in that an emphasis fixed therein is placed in the housing to limit the movement of said traction . 2. The drive according to claim 1, characterized in that the emphasis is fixed to the cover of the casing of said gearbox. 3. The drive according to claim 1, characterized in that the housing is equipped with a front panel, on the inside of which the said stop is fixed. 4. The drive according to claim 1, characterized in that the gear housing is made of injection molding material Silumin. 5. The drive according to claim 1, characterized in that the gears, gears and bearing caps are made of corrosion-resistant, wear-resistant steel.

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