RU2232090C2 - Group drive of diesel locomotive two-axle bogie - Google Patents

Abstract

FIELD: railway transport; bogie group drives.

SUBSTANCE: proposed group drive of two-axle bogie contains electric motor I in middle zone of bogie and distributing gear wheels 7. Each gear wheel is connected by driving cardan clutch 9, cross shaft 10 and driven cardan clutch 12 with independent axial gear train of each wheelset. Two hollow trunnions 4 are secured on frame of electric motor, and driving gear 14 is fitted on shaft 13 of electric motor. Distributing gear wheels are installed on hollow trunnions for meshing with driving gear of electric motor. Driving cardan clutches are located inside hollow trunnions and are connected with distributing gear wheels by flanges.

EFFECT: simplified design, reduced overall dimensions of group drive of diesel locomotive two-axle bogie.

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Description

The invention relates to railway transport, in particular to the design of a group drive of a biaxial diesel locomotive.

A group drive of a biaxial diesel locomotive trolley is known, comprising an electric motor located in the middle zone of the trolley and a group reducer driven by it, fixedly mounted on the trolley frame, in which a driving gear is mounted on the input shaft and intermediate gears and driven gear gears are located on both sides of it. . Moreover, each transfer wheel is connected by a drive universal joint, a transverse shaft and a driven universal joint with an individual axial gear for each wheel pair. The bearing housing of the group gearbox is not connected to the core of the electric motor. To connect the input shaft of the group gearbox with the electric motor shaft, a large-length longitudinal coupling is used (see Diesel locomotives / Edited by N.I. Panov. - M.: Mashinostroenie, 1976, p. 431, scheme No. 13).

The disadvantage of this design is its complexity and increased dimensions, which complicate the placement of equipment in the frame of the trolley. Fixing the group gearbox on the frame of the trolley leads to the strengthening of its metal structure, increases the mass of the biaxial trolley as a whole.

Installation and operation of the group gearbox on the frame of the trolley is associated with great difficulties, since the body of the group gearbox is isolated from the core of the electric motor, as a result of which slight deviations from the installation dimensions cause a misalignment of the input shaft of the group gearbox with the motor shaft, which leads to a tense mode of operation of the longitudinally convoluted couplings.

The invention solves the problem of simplifying the design and reducing the overall dimensions of a group drive of a biaxial diesel locomotive.

To solve this problem, a group drive of a biaxial diesel locomotive trolley, comprising an electric motor and gear gears in the middle zone of the trolley, each of which is connected by a drive universal joint, a transverse shaft and a driven universal joint with an axial gear individual for each wheel pair, is equipped with two hollow pins, fixed to the core of the electric motor, and the pinion gear mounted on the shaft of the electric motor, and the transfer gears mounted on these hollow pins engage with the drive gear of the electric motor and the drive cardan coupling located inside the hollow pins and are connected to the transmission gear flanges.

Such a design of a locomotive group drive, which is equipped with two hollow pins mounted on the engine frame and a pinion gear mounted on the motor shaft, the gear wheels mounted on these hollow pins and mesh with the pinion gear of the electric motor, and the drive cardan couplings are located inside hollow trunnions and connected to the gears by flanges, is simpler and reduced overall dimensions. In this case, the centering operation of the shafts using a longitudinally flat coupling is not required.

The inventive group drive biaxial carts can be used on shunting and freight diesel locomotives, which will simplify the design of the crew of these diesel locomotives.

The invention is illustrated by drawings, where figure 1 shows the proposed drive, a view of the trolley in plan; figure 2 is a cross section of the transfer gears in a vertical plane with the application of forces acting on the backbone of the traction motor and the frame of the trolley.

The group drive of the biaxial diesel locomotive trolley has a traction motor 1, mounted on the middle transverse beams 2 of the frame 3 of the trolley. On the core of the electric motor there are installed two hollow pins 4 opposite each other, oriented along the electric motor parallel to its shaft, on which the pinion gear 5 is mounted. The bearings 6 of the hollow pins 4 are equipped with gears 7, which engage on both sides of the pinion gear 5 and connected by a flange 8, a drive cardan clutch 9, a transverse shaft 10 having a spline joint 11, and a driven cardan clutch 12 with an input shaft 13 of the axial gear. The axial gear transmission, consisting of gear 14 mounted on the shaft 13, and gear 15 mounted on the axle 16 of the pair of wheels, is mounted in the bearing housing 17. The gears 7 together with the drive gear 5 have a protective casing 18, which serves to preserve lubrication .

The drive cardan coupling 9 provides the transmission of torque in the presence of an angle between the geometric axes of rotation of the flange 8 and the transverse shaft 10. The driven cardan coupling 12 - in the presence of an angle between the geometric axes of rotation of the transverse shaft 10 and the input shaft 13 of the axial gear. As cardan couplings, double hinged couplings (cardans), plate or rubber-cord couplings, as well as couplings with elastic hinges, can be used.

When assembling a group drive on a crew carriage, the driving gear 5 is first mounted on the electric motor shaft and gears 14 on the input shafts 13 of the axial gears. Hollow trunnions 4 with the gear wheels 7 are separately mounted on the core of the electric motor, the transverse shafts 10 are connected with cardan couplings with the flanges 8 and the input shafts 13 of the axial gears. When the transverse shafts 10 are separated by splines, the flanges 8 are fixed on the gears 7. The electric motor 1 with the gears 7, cardan couplings 9 and 12 is fixed on the middle transverse beams 2 of the trolley frame 3 and the gears 14 of the axial gears are installed by means of split housings 17.

Group drive operates as follows. On the drive gear 5 of the electric motor, forces T are formed (see FIG. 2), which are transmitted to the transfer gears 7, and torque

M = T cosφ d

where φ is the gearing angle of gearing;

d is the diameter of the circle of engagement of the pinion gear.

The opposite moment M acts on the core of the electric motor. Equal, but oppositely directed forces T and N can be applied on the axes of the gears 7. The gears 7 rotate under the action of pairs of forces T. The torque from the gears 7 is transmitted through flanges 8, drive cardan couplings 9, transverse shafts 10 and driven cardan couplings 12 to the input shafts 13 of the axial gears. From the input shaft 13, the torque is transmitted to the gear 14 and from this gear through the gear 15 to the axis 16 for each wheelset. At the same time, the axle gear housings 17 do not rotate, since they are fixed on the frame of the trolley. Radial forces N act on hollow trunnions. Under the influence of these forces, an additional moment acts on the skeleton of the traction motor

M ₁ = M · (i + 1),

where i is the gear ratio of the gear motor.

The additional moment M _{1 is} directed opposite to the moment M. The moments M and M ₁ on the skeleton of the traction motor are added up, and the resulting moment M · i is formed, which is transmitted to the frame of the trolley. From this moment, forces are formed on the middle transverse beams 2

Radial forces on the motor shaft are not formed, which favorably affects the operation of its bearings. Due to the summation of the moments on the skeleton of the electric motor, the frame of the trolley receives significantly less effort.

The base of the trolley is determined by the center distances of the gears

B = (C ₁ + C ₂ ) · 2,

where C ₁ - the center-to-center distance of the gear transmission of the electric motor;

C ₂ - the center-to-center distance of the axial gear transmission. The radius of the gear wheel is

R ₁ = U ₂ -a-Δ,

where a is the radius of the axis of the wheelset;

Δ is the gap between the axis and the circumference of the gear of the gear of the gear.

The radius of the pinion gear is

r ₁ = C ₁ -R ₁ .

The construction base of the trolley is completely determined by the transverse size of the traction motor. At the same time, an increase in the base of the trolley by setting intermediate gears is not required. With the existing dimensions of the traction motors, the gear ratio i is selected equal to 1.2 ... 1.5. The speed mode of the gear transmission of the electric motor is determined by the radius r _{1 of the} pinion gear. With the selected gear ratio, the peripheral speed of the gears will be 3 ... 4 times greater than with a minimum radius r ₁ , determined by the condition of strength or the condition of undercutting of the ridges of the pinion gear 5.

The proposed group drive of a biaxial trolley is simpler in design and provides the necessary space for placing equipment in the dimensions of the trolley. It also provides ease of installation and maintenance of the drive due to the installation of the gears on the hollow trunnions of the motor.

Claims (1)

A group drive of a biaxial diesel locomotive trolley, comprising an electric motor and gear gears in the middle zone of the trolley, each of which is connected by a drive universal joint, a transverse shaft and a driven universal joint with an axial gear individual for each wheel pair, characterized in that it is equipped with two hollow pins, fixed to the core of the electric motor, and the pinion gear mounted on the shaft of the electric motor, and the transfer gears mounted on these hollow pins and enter meshing with the driving gear of the electric motor, and the driving cardan couplings are located inside the hollow trunnions and are connected to the transfer gears by flanges.

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