RU2164876C1 - Housing of electric train with crescent-shaped suspension - Google Patents

Abstract

FIELD: mechanical engineering; electric train traction transmission devices. SUBSTANCE: to increase strength, reduce dynamic loads and drawbacks in maintenance services, crescent-shaped suspension attachment unit of reduction gear housing is made in form of two parallel brackets, each having coaxial slot for H-section shackle attachment axle. Each semi-housing is provided with shaped boss in zones of larger neck and butt flanges. Each hinge joint is made in form of rubber-metal (silent) block. EFFECT: improved strength of reduction gear housing. 4 cl, 3 dwg

Description

 The invention relates to the field of engineering, in particular to devices for traction transmission on electric trains, and can be used in gearboxes of traction drives on electric trains ER-1, ER-2 in railway transport.

 Known electric gearbox housing containing the upper and lower half-shells connected through connecting flanges and forming a large neck, the upper half-shell has a small neck, a cargo eye, a breather and a suspension eye of the body, the lower half-shell has an oil drain and oil filling holes with plugs (additional cargo hole Utility Model Certificate N 5833, F 16 H 57/00, 19.02.97).

 However, the known device does not have the crescent suspension necessary for more stable operation of the traction drive.

 By technical nature, the closest to the proposed invention is the casing of an electric train reducer with a crescent-shaped suspension, comprising an upper and lower half-housing connected through connecting flanges and forming a large neck, the upper half-housing has a small neck, a cargo eye, a breather, and the lower half-housing has an oil and oil drain hole plugs, the attachment to the upper half-shell of the crescent-shaped suspension, including the earring, the lower end of which is articulated to the upper half-shell and the upper nets pivotally connected through a bolt of fastening to the frame of the car. (I.V.Biryukov et al. Traction gears of electric rolling stock of railways. - M.: Transport, 1986, p. 84.85).

 However, the known device does not have the necessary strength characteristics, in particular a weak attachment point of the crescent-shaped suspension to the housing, and swivel joints such as a spherical plain bearing are not durable with significant vibrations. In addition, there are no tools that allow for operational control of the cleanliness of the cavity and wear of the gear transmission.

 The technical result is an improvement in the strength characteristics of the hull and ease of use, as well as a reduction in dynamic loads on the hull with a crescent-shaped suspension.

 This is achieved by the fact that in the gearbox housing of the electric train with a crescent-shaped suspension containing the upper and lower half-bodies connected through connecting flanges and forming a large neck, the upper half-body has a small neck, a cargo eye, a breather, the lower half-body has an oil filling and oil drain hole with fastenings to the upper half-shell of the crescent-shaped suspension, including the earring, the lower end of which is pivotally connected to the upper half-housing and the upper end of the articulated through a bolt of fastening with frames oh car, according to the invention, the crescent-shaped suspension attachment is made in the form of two parallel brackets, which are part of the upper half-body and have an I-section along the coaxial groove under the axis of attachment of the earring, each swivel being made in the form of an elastic rubber-metal block, and each half-case equipped with a figured tide in the areas of the large neck and connecting flanges, and the lower half-housing is equipped with an additional cargo eye, in addition, the crescent-shaped earring is made the cast, and the lower half shell is provided in the bottom portion of the rear wall of the hatch, which is arranged oil-filling hole with stopper, moreover, the axis of fastening earring secured in aligned grooves parallel brackets with screws perpendicular to it.

 The essence of the invention lies in the fact that the implementation of the attachment point of the crescent-shaped suspension in the manner described above, additional changes in the design of the casing can reduce dynamic loads by damping the vibrations of the casing and suspension, and the presence of a hatch with an oil filling hole allows for operational control.

 Comparison of the claimed device with the closest analogue allows us to claim compliance with the criterion of "novelty", and the absence of distinctive features in the analogs indicates compliance with the criterion of "inventive step".

 Preliminary tests confirm the possibility of industrial use.

 In FIG. 1 - 3 presents the design of the proposed device.

 The device contains an upper and lower half-hull 1 and 2, respectively, a crescent-shaped suspension, including an earring 3, with a lower end pivotally connected to the upper half-hull 1 and the upper end pivotally connected via a fastening bolt 4 to the frame of the car (not shown).

 The upper half-housing 1 has a breather 5, a small neck 6 and a cargo eye 7, and the lower half-housing 2 is equipped in the bottom part with a hatch 8, on which there is an oil filling hole 9 with a stopper, a cargo eye 10, an oil drain hole 11 with a stopper.

 The upper and lower half-shells 1 and 2 are connected through the connecting flanges 12 and 13 and form a large neck 14, while each half-housing is equipped with a figured tide 15 and 16 in the areas of the large neck 14 and the connecting flanges 12 and 13, respectively.

 The crescent-shaped suspension attachment is made in the form of two parallel brackets 17 and 18, which are part of the upper half-housing 1 and have a coaxial groove 19 and 20 under the axle 21 of the earring 3. The latter has a two-T-section and can be cast.

 The axis 21 of the attachment of the earring 3 is fixed in the coaxial grooves 19, 20 of the parallel brackets 17, 18 with the help of bolts 22 perpendicular to it.

 The hinged connection of the earring 3 with the upper half-housing and with the bolt 4 of the fastening to the carriage frame, made in the form of identical elastic rubber-metal blocks 23, lower and upper, respectively. (Fig. 2 shows the lower rubber block).

 The device operates as follows.

 The engine transmits the rotation to the wheelset using a gear train. The moment from the supporting reactions in the bearings of the gear shaft acts on the gear housing. It is balanced by the reaction force of the crescent-shaped suspension of the gearbox, which must have the necessary bearing capacity, and also allow movement of the housing relative to the trolley frame within certain limits, which is necessary for the elastic ties of the axle box assembly to work. This necessitates the articulation of the gearbox with the frame of the trolley in all coordinates. The force is transmitted from two parallel suspension brackets 17, 18 to the axis 21 through the lower rubber block 23 to the earring 3, then through the upper rubber block 23 to the bolt 4 and then to the carriage frame. In the process, dynamic loads arise from the movement of the car along the irregularities of the path and vibration from the work of the gear transmission.

 Thus, the implementation of the gear housing with a crescent-shaped suspension in the above manner significantly reduces the level of dynamic load, which reduces the risk of cracks and fatigue damage in the suspension elements. By reducing the dynamic load of the suspension, the service life of the traction gearbox and car frame is extended.

 Curly tides 15 and 16 increase the rigidity of the walls of the housing in the region of the large neck 14 and the connecting flanges 12 and 13.

 The presence of the hatch 8 with the oil filling hole 9 located on it allows operational control of the gear wheels of the gearbox and timely cleaning of the internal cavity of the gearbox from contamination.

 An additional cargo eye 10 improves the convenience in mounting the gearbox on the carriage frame.

Claims (4)

 1. The gearbox housing of the electric train with a crescent-shaped suspension, containing the upper and lower half-shells connected through connecting flanges and forming a large neck, the upper half-shell has a small neck, a cargo eye, a breather, the lower half-shell has an oil filling and oil drain hole with plugs, a mounting unit for the upper half crescent-shaped suspension including an earring, the lower end of which is pivotally connected to the upper half-housing and the upper end of the articulated through a bolt of attachment to the frame of the car, characterized by m, that the crescent-shaped suspension attachment is made in the form of two parallel brackets, which are part of the upper half-shell and have a coaxial groove under the axis of attachment of the earring, which has an I-section, each swivel is made in the form of an elastic rubber-metal block, each half-housing is equipped with a figured tide in the areas of the large neck and connecting flanges, and the lower half-housing with an additional cargo eye.  2. The housing according to claim 1, characterized in that the crescent-shaped earring is cast.  3. The housing according to claim 1, characterized in that the lower half-hull is equipped in the bottom part of the rear wall with a hatch on which an oil filling hole with a stopper is located.  4. The housing according to claim 1, characterized in that the axis of attachment of the earring is fixed in the coaxial grooves of the parallel brackets with bolts perpendicular to it.

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