JPS591877Y2 - Gear system in right-angle drive truck - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a gear device in a right-angle drive type electric truck.

Conventionally, a right-angle drive type electric trolley has an electric motor whose axis is in the direction of vehicle movement mounted on the cart frame, and a small bevel gear connected to one end of the armature shaft of the motor via, for example, a gear type flexible shaft joint and a propulsion shaft. and a large bevel gear fixed to the axle are driven by meshing with each other, and one end of a gear box housing the small bevel gear and the large bevel gear is mounted on the bogie frame.

In this case, gear oil is stored as a lubricating oil in the gear box of the gear device to lubricate the meshing tooth surfaces, and the gear oil is supplied to each bearing part by a splash method or a pump method for lubrication. Separately, grease is sealed as a lubricant inside the gear type flexible shaft joint to lubricate the meshing tooth surfaces of the internal and external gears, and the gear system and the gear type flexible shaft joint are each separate. The structure is complicated and heavy, and low-viscosity gear oil leaks from gear-type flexible shaft joints, so it is necessary to use high-viscosity grease, which makes handling difficult in terms of maintenance. There was a drawback.

In order to solve the above-mentioned drawbacks of the conventional technology, the present invention also incorporates a gear type flexible shaft joint in the gear box, fixes the gear box to the electric motor, and applies gear lubricating oil such as gear oil to each bearing part and the gear type. It is characterized in that it is circulated and supplied within the flexible joint, and will be described below based on the drawings showing examples.

FIG. 1 is a plan view showing the first embodiment of the present invention, and FIG. 2 is a sectional view taken along line II-II in FIG.
One electric motor 1 is arranged with the axis direction being the vehicle traveling direction,
Bevel gears 4 such as hypoid gears are arranged in a straight line on both ends of the armature shaft 2 of the electric motor 1 through gear-type flexible shaft joints 3, allowing deviation in the radial direction of the front and rear axles 5, respectively. A hollow shaft 7 is attached to the front and rear hollow shafts 7 through a well-known deflection device 6 that transmits rotational force, and large bevel gears 8 fixed to the front and rear hollow shafts 7 at points symmetrical with respect to the center of the bogie are attached to the above-mentioned bevel gears. A gear box 9 that meshes with the small gear 4 and contains the large bevel gear 8, small bevel gear 4, and gear type flexible shaft joint 3 is fixed integrally and oil-tightly to the front and rear of the electric motor 1 with mounting bolts or the like. , the integrated structure is elastically mounted on a bogie frame 11 using hanging devices 10 at four locations.

In the above embodiment, the electric motor 1 is one piece, and the armature shaft 2
Although the bevel pinion gear 4 is provided at both ends, it is also possible to use two electric motors and provide the bevel pinion gear 4 at one end of each armature shaft to drive the motor as in the past. The present invention can also be applied to the case where the wheel 8 is directly fixed to the axle 5 without using the hollow shaft 7 and driven.

As shown in FIG. 2, gear lubricating oil such as gear oil is stored in the lower part of the gear box 9, and as the large beveled gear 8 rotates, the gear lubricating oil is splashed up and released from the base of the meshing tooth surfaces. The lubricating oil is provided so that it lubricates the respective bearings of the gear 8 and the bevel pinion gear 4 and the meshing tooth surfaces of the inner and outer gears in the gear type flexible joint 3 and circulates through a lubricating oil path 12 shown by the arrow.

FIG. 3 is a sectional view showing a second embodiment of the lubricating oil path 12 corresponding to FIG. 1
A lubricating oil passage 12 is provided so as to be supplied into the gear type flexible shaft joint 3 through the lubricating oil passage 12.

FIG. 4 shows the third lubricating oil path 12, which also corresponds to FIG. 2.
This is a cross-sectional view showing an embodiment, and as in the case of FIG. A lubricating oil path 12 is provided so that gear lubricating oil stored in the lower part of the shaft joint and overflowing beyond a predetermined storage amount flows back to the lower part of the beveled gear 8.

In addition, although the above-mentioned embodiments show the case of splash type lubrication, the present invention is not limited to this, and each of the above-mentioned parts may be lubricated by, for example, a forced lubrication type using a conventionally known pump or the like.

The present invention is constructed as described above, and the gear-type flexible shaft joint is also built into the gear box and is fixed to the electric motor, so the structure is simple, the space is small, and the weight can be reduced.
Furthermore, each part is lubricated with only one type of gear lubricating oil, making maintenance easy and extremely effective in practice.

[Brief explanation of the drawing]

Fig. 1 is a plan view showing the first embodiment of the present invention, Fig. 2 is a cross-sectional view taken along the line I - -■ in Fig. 1, and Fig. 3 is a cross-sectional view of the second embodiment corresponding to Fig. 2. , FIG. 4 is a sectional view of the third embodiment, which also corresponds to FIG. 2. 1: Electric motor, 2: Armature shaft, 3: Gear type flexible shaft joint, 4
: Small bevel gear, 5: Axle, 6] Deflection device, 7: Hollow shaft, 8: Large bevel gear, 9: Gear box, 10: Hanging device, 11
: Bogie frame, 12: Lubricating oil route, 13: Conduit.

Claims (1)

[Scope of utility model registration request] A small bevel gear 4 is attached to one or both ends of an armature shaft 2 of an electric motor 1 whose axial direction is in the direction of vehicle movement via a gear type flexible shaft joint 3.
In the right-angle drive type truck which is driven by meshing the small bevel gear 4 with the large bevel gear 8 attached directly to the axle 5 or via the hollow shaft 7, the gear type flexible shaft joint 3,
A gear box 9 containing the small bevel gear 4 and the large bevel gear 8 is fixed to the electric motor 1, and gear lubricating oil is applied to the gear box 9 and the bearings of the large bevel gear 8 and the small bevel gear 4 as well as the gear. A gear device for a right-angle drive type truck, characterized in that a lubricating oil path 12 is provided to circulate and supply a lubricating oil to a type flexible shaft joint 3.