RU2286627C1 - Electrical machine commutator treatment device - Google Patents

Abstract

FIELD: electrical engineering; repairs of primarily totally-enclosed electrical machines for heavy-freight motor vehicles.

SUBSTANCE: proposed device designed for repairing DC electrical machine commutators has base which is joined with bracket and carries loosely mounted carriage with at least one working tool secured thereon, as well as lead screw coupled with carriage; novelty is that base has inner space accommodating bearing-mounted lead screw with drive nut; working tool is mounted on carriage for displacement; DC motor is joined to base and communicates with lead screw by means of closed flexible joint. In addition, drive nut has hole to receive carriage-mounted bolt. Device is also provided with two adjustment screws of which one is mounted in carriage and is coupled with working tool; other one is installed in base and is coupled with bracket-mounted strip.

EFFECT: enhanced degree of uniformity throughout entire surface of commutator being treated.

3 cl, 2 dwg

Description

The invention relates to elements of electrical equipment, in particular to devices for repairing electric DC machines, mainly closed, and is intended for the treatment of engine manifolds used for motor wheels of heavy vehicles.

A device for grinding collector rings (AS Czechoslovakia No. 254085, publ. 14.08.88.) Consisting of an auxiliary holder attached to the synchronous motor case with brushes and a device with a tool for processing rings. The brushes are connected to the power source through an adjustable rectifier (frequency converter). Before processing the surface of the assembled rings mounted on the rotor, an operational brush holder with brushes is dismantled and an auxiliary holder with repair (new) brushes is attached to the motor housing. These brushes are connected to an auxiliary power source, the voltage value of which is equal to the excitation voltage at idle of the engine.

To use this device, partial dismantling of the engine and additional equipment are necessary, which is difficult to ensure during the repair of motor wheels in the absence of a repair base. In addition, the rigid attachment of the ring processing device to the motor housing makes it necessary to reinstall the working tool in order to process the entire surface of the rings, which requires a more precise adjustment of the tool and does not ensure uniformity of the machined surface.

A device is known for grinding surfaces of collectors and slip rings, comprising a grinding block mounted through a pressure plate on a transverse caliper mounted on a longitudinal caliper, and a transition piece — an air chamber with an opening in the form of a nozzle with a tip. The body of the air chamber is attached with a paw to the line of the brush beam of the electric machine. The transverse caliper is moved by hand, using a lead screw and a gear, longitudinal - similarly, using a micrometer screw (patent DE 8322929 U, class IPC H 01 R 43/14, publ. 1983).

The described device partially solves the problem of moving the working tool — the grinding bar over the entire width of the surface being machined. However, the gear, moving calipers and screws using manual adjustment increase the complexity of installing the working tool with the accuracy necessary for uniform processing of the surface of the collector. In addition, this device cannot be used in closed-type machines (motor-wheels) without dismantling due to the limited space that can be used for the installation of any devices.

The claimed technical solution allows to treat the surfaces of the collectors of electric machines of a closed type (motor-wheel), with a high degree of uniformity over the entire surface, providing accuracy and reliable operation of the device in a limited space, due to its compactness and reduction in the proportion of manual adjustment, which is especially important in the absence of special conditions for repair.

The problem is solved in that in a device for processing collectors of electric machines, comprising, connected to the bracket, a base on which the carriage is movably mounted, with at least one working tool fixed to it and a lead screw connected to the carriage, the base is made with an internal cavity in which a spindle with a drive nut is installed on the bearings. At the same time, the working tool is mounted on the carriage with the possibility of movement, and a DC motor is connected to the base, which communicates with the lead screw through a closed flexible connection. In addition, a hole is made in the lead nut in which a bolt mounted on the carriage is installed. The device is additionally equipped with two adjusting screws, one of which is installed in the carriage and communicates with the working tool, and the other is installed in the base and communicates with a curved bracket fixed to the bracket.

The shape and relative position of the bearing parts and elements for adjusting and adjusting the device ensure the proper quality of the surface treatment of the collectors, compactness and reliability of the device as a whole.

The invention is illustrated by drawings, where figure 1 shows a General view of the device; figure 2 is a section along aa.

The device consists of a base 1, a carriage 2, working tools fixed on it, for example, cutters 3, communicating with the first pair of adjusting screws 4 installed in the end of the carriage 2. At the base 1 there is a cavity 5 in which the screw 6 is mounted on bearings 7 and 8, connected to the leading nut 9, in which the hole 10 is made. The leading nut 9 is connected to the carriage 2 by a bolt 11 installed in the hole 10 of the leading nut 9. The base 1 is secured with, for example, straps 13 and studs 14 on the bracket 12, which is an element of dv igator and is located near the collector. In addition, braces 12 are fixed to the brace 12, communicating with the second pair of adjusting screws 16. To ensure a more smooth stroke of the carriage 2 between the contacting surfaces of the base 1 and the carriage 2, a gap 17 can be made with the strap 18 placed in it, the compression force of which is regulated by screw 19. A DC motor 21 is connected to the base 1 via a bracket 20, connected to the lead screw 6 by a closed flexible coupling (belt or chain transmission) 22. The DC motor 21 can be powered both from a stationary source (AC adapter) and from an autonomous source (battery). The direction of rotation of the motor 21 is determined by a standard three-position switch. The power source and switch are not shown in the drawings.

The device operates as follows.

Before turning on the device, it is necessary to accurately determine the location of the working tool relative to the surface of the collector. For this, the bolt 11 is removed, the carriage 2 acquires the ability to move freely along the base 1. After the carriage is installed, the bolt 11 is installed in the hole 10 of the driving nut 9 and fixes the position of the carriage 2 relative to the base 1. Using the first pair of adjusting screws 4, the working position is determined tool relative to the surface to be processed. Using the second pair of adjusting screws 16, the parallelism of the surfaces of the base 1 and the treated collector is ensured during operation of the device. After presetting, the DC motor 21 is energized. Through a closed flexible connection 22, the torque is transmitted to the spindle 6, which ensures the movement of the carriage with the working tool along the surface of the collector. When switching, the polarity of the power source changes, the spindle 6 starts to rotate in the opposite direction and the carriage 2 performs a reverse stroke. If necessary, the smooth running of the carriage 2 can be adjusted by adjusting the screw 19 of the compression force of the strap 18 installed in the gap 17.

The proposed design of the device for treating the collectors of electric machines, due to its compactness and regulating capabilities, makes it possible to repair the engine without dismantling it, ensuring high-quality surface treatment of the collector in optimal time, due to the accuracy of tuning of the working tool, which is indispensable when operating motor wheels of heavy vehicles, especially in conditions lack of repair base.

Claims (3)

1. A device for processing collectors of electrical machines, comprising a base connected to the briquette, on which a carriage is mounted movably with at least one working tool mounted on it, and a screw connected to the carriage, characterized in that the base is made with an internal cavity, in which a threaded spindle with a driving nut is installed on the bearings, the working tool is mounted on the carriage with the possibility of movement, and a DC motor connected to the base is connected to the spindle in the middle Twomey closed flexible communication. 2. The device according to claim 1, characterized in that a hole is made in the lead nut in which a bolt mounted on the carriage is installed. 3. The device according to claim 1, characterized in that it is equipped with two adjusting screws, one of which is installed in the carriage and communicates with the working tool, and the other is installed in the base and communicates with a curved strip fixed to the briquette.

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