US 3548751 A
Description (OCR text may contain errors)
United States Patent  Inventors Georgy lgnatievich lzhelya,
Ulitsa Malopodvalnaya l4, kv. 13; Konstantin Alexeevich Bykov, Ulitsa Streletskaya 14, kv. 2; Boris Sokratovich Veneraki, Ulitsa Gorkogo 155, kv. 28; Alexandr lvanovich Vishnikln, Ulitsa Belorusskaya l, kv. 17; Vladimir Andreevich Mishalrin, Ulitsa Selskokhozyaistvennaya 7/9, kv. 19; Sergei Alexeevich Rebrov, Ulltsa Nikolsko, Botanicheskaya 14, kv. 20; Itskhok Avrumovich Spektor, Ulitsa Muromskaya 3, kv. 15, and Alexandr Grigorievich Shapovalenko, Ulitsa Zatonskogo 15/41, kv. 25, all of Kiev, U.S.S.R.
21 Appl. No. 710,221
 Field ofSearch 104/118, 120. I38. 148LM. 119: 105/l.26.49.77, l, 141,
Primary Examiner-Arthur L. La Point Assistant Examiner-Howard Beltran Attorney-Waters, Roditi, Schwartz & Nissen ABSTRACT: The running gear of electric stock employed on electrified monorails, comprising line induction traction rnotors wherein the rotor is the tractive guide rail, while the split stators are arranged on both sides of said rail, said stators being mounted on a separate bogie connected to the running bogie of the electric stock by means of a rod which transmits only longitudinal, relative to the tractive rail, efforts.
 Filed Mar. 4, 1968  Patented Dec. 22, 1970  ELECTRIC LINEAR LOCOMOTIVE 4 Claims, 4 Drawing Figs.
 11.8. C1. 104/148, 104/120;105/49,105/77,I05/l45,105/215  Int. Cl. B601 13/00, B6lc 3/00; HOZk 41/02 PALENTED UEC22 I970 sum 2 or 2 ELECTRIC LINEAR LOCOMOTIVE The invention relates to running gears of electric stock used on a monorail.
The running gear of electric stock employed up to the present time on monorail in Japan, the USA, German Federal Republic, Italy is made in the form of running bogies with driving wheels provided with DC tractive electric drives.
In this case traction effort is transmitted from an electric motor to the driving wheels through a reducing gear. Conversion of rotation produced by the tractive motor armature into forward motion of the running stock is performed by means of adhesion between the driving wheels and the bearing surface of the monorail trestle.
The designers of monorail stock electric drives that have no reducing gears, for instance in the UK, suggest that a railway tractive induction motor should be used, said motor having a split stator whose rotor is a tractive rail made from aluminum bus. In such a construction the split stators of the electric motor arranged on both sides of the tractive. rail are rigidly attached to a running bogie of the stock. In this case tractive effort is generated owing to an electromagnetic interaction between the stators and the tractive rail and is transmitted directly to the running bogie making conversion from one kind of energy into another unnecessary.
The running gears of the electric stock for employment on monorails, both in use now and those still under design, have a number of serious disadvantages.
To utilize tractive effort through driving wheels when using a running gear of the stock in conjunction with a DC tractive motor calls not only for a reducing gear but also for a certain amount of adhesion weight which artificially increases the stock weight. What is more, utilization of adhesion force extends exacting requirements to the condition of the bearing surface of the monorail trestle. Besides, a DCelectric drive requires converter substations for power supply which substantially detracts from power efficiency.
It the running gear is provided with railway induction motors, one of the major requirements to be met is that a certain minimum air clearance between the split stators and the tractive rail should be kept constant. Deviation of the air clearance from the rated value, especially a larger clearance, while the motor is running, results in unstable tractive performance.
When the split stators of the railway motor are rigidly attached to the running bogie, the vibration of the rolling stock will influence the amount of air clearance between the stators and the tractive rail. Rigid attachment of stators to the running bogie causes special trouble on curvilinear sections of the monorail.
Apart from this, employment of a bus made from aluminum, which is nonmagnetic material, reduces the power efficiency of the electric motor because a considerable rise in magnetizing current.
The object of this invention is to provide for a constant minimum air clearance between the split stators and the tractive rail, for stable tractive performance of the running electric motor and for its higher power efficiency.
This object is achieved by arranging the split stators of each electric motor on an individual bogie which is connected with the running gear of the stock by means of a tie that only transmits efforts longitudinal with respect to the tractive rail. Said tie between the bogies may be made in the form of a rod fitted with hinges. For a free lateral movement of the stators inside the bogie, the body of the latter should be provided with grooved bars fixed thereto, wherein the guides of split stators travel.
A compensation spring device can also be arranged on the bogie sidewalls, said device being connected by pins with the magnetic circuits of the split stators.
The invention will appreciated better from a description of its exemplary embodiment with the appended drawings, where:
FIG. 1 shows a side view of the running bogie and the bogie carrying the induction motors;
FIG. 2 is a plan view of the same; FIG. 3 shows a side view of the electric motor bogie, with parts of the body cutout to make visible the grooved bars;
FIG. 4 shows a front view of the electric motor bogie with the clamp of the right stator removed and illustrating the rail 5 and the left clamp 14 in front of the roller 12 in section.
The running gear of the monorail electric stock comprises bogie 1 for the railway induction motor (FIGS. 1 and 2), running bogie 2 and a tie consisting of rod 3 with hinges 4 at its ends, said rod transmitting the tractive effort from said bogie I to running bogie 2. Bogie l of the railway induction motor travels over tractive guide rail 5 serving as a rotor of the electric motor and made in the form of a rectangular-shaped steel strip. Employment of tractive rail 5 made from magnetic material allows the reduction of the magnetin'ng current of the electric motor as compared to that of the motor whose tractive rail is made from aluminum. In addition, a steel tractive rail conn'ibutes to be strength of the construction. Tractive rail 5 is rigidly attached on monorail beam 6 of the monorail road.
Bogie l of the electric motor comprises body 7 (FIGS. 3, 4) ribbed for rigidity, said body serving at 'the same time as the housing of the electric motor. The bogie of the electric motor runs along tractive rail 5 in a strictly predetermined position with respect to said rail owing to bearing rollers 8 secured by means of levers 9 to axles 10in body 7 of the bogie. Each electric motor has split stators 11 arranged inside body 7 of bogie 1 on both sides of tractive rail 5. The air clearance between stators l1 and tractive rail 5 is provided with spaced rollers 12 secured to axles 13 of the stator clamp. 14. The specified air clearance is obtained by adjusting the position of axles 13 of the spaced rollers 12.
For a free lateral movement of split stators ll inside bogie 1, body 7 of this bogie is fitted with grooved bars 15 forming transverse guiding slots wherein guides 16 of the stators travel.
Attached to the lateral walls in body 7 of bogie 1 are compensation spring devices 17 which are connected by pins 18 with clamps 14 of the magnetic circuit of stators 11. A compensation device is required because employment of a steel tractive rail results in the generation of magnetic attraction between the magnetic circuits of the motor stators and the tractive rail. This magnetic attraction force is transmitted to space rollers 12 which are unloaded by means of said compensation spring device 17.
The suggested invention can find application not only in monorail road but also in other hauling and hoisting devices, for instance in mining transport means operating on steep tracks, in. driving lifts and elevators, in driving bogies and bridges of cranes, etc.
1. A running gear of electric stock comprising a first bogie, a second bogie, a monorail supporting said first and second bogies for movement therealong, an induction motor being supported on said second bogie, said monorail being constituted as a rotor of said induction motor, said induction motor having split stators arranged one on each side of said monorail, first means interconnecting said second bogie to said first bogie for transmitting longitudinal force from one to the other of said bogies along said monorail, and second means interconnecting said split stators to said second bogie for freeing said stators from the effect of vibration forces acting on said second bogie by said first bogie transversely of said monorail.
2. A running gear as claimed in claim 1, wherein said means interconnecting said bogies includes a rod having a hinge at each of its ends, said hinges being connected one to each of said bogies.
3. A running gear as claimed in claim 1, wherein said second means includes a pair of coacting grooved bars slidingly constrained one relative to the other transversely of said monorail.
4. A running gear as claimed in claim 1, wherein said second bogie includes compensating springs interposed between said stators and said second bogie.