JPS63269769A - Nose suspension type main motor gear box for vehicle - Google Patents

Abstract

PURPOSE:To prevent a lubricating oil from leaking out by providing an annular wall at a wall portion of a gear box and inside of a presser ring retaining a seal member, which annular wall has an inner diameter smaller than that of the seal member, in such a manner that the annular wall surrounds a main motor shaft. CONSTITUTION:The titled gear box comprises upper and lower elements 1 and 2 each having brackets 3 and 4 welded thereto for mounting to a main motor. The upper and lower elements 1 and 2 are integrally connected by fittings 5. The gear box encases a pinion 12 mounted on a main motor shaft 19 and a gear wheel 13 meshing with the pinion 12. The shaft 19 is supported by a bearing 17 encased in a bearing box 20. The gear box is further provided with presser rings 6-8 having grooves adapted to engage seal members 9-11 for preventing leakage of a lubricating oil in the elements 1 and 2. The presser ring 6 is integrally formed with an annular wall 22 projecting inwardly of the gear box and surrounding the shaft 19. The annular wall 22 has an inner diameter smaller than that of the seal member 9.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a suspended main motor gear box for a vehicle.

[Conventional technology]

Figure 6 is “Science of Sono 1 Ki Car” published by Electric Car Research Association (19
It is a perspective view showing a conventional gear box published in ``Regarding improvement of reliability of ED76 type electric locomotive drive'' on page 48 (October 1985 issue).

In the figure, code (1) is the upper box, (2) is the lower box, (
3).

(4) is the upper and lower box f1), the mounting bracket to the main motor welded to (2), (5) is the tightening bracket for tightening and fixing the upper box (1) and the lower box (2), ( 6) to (8) are upper and lower boxes n+, and sealing members such as felts (9) to (1) are used to prevent leakage of gear lubricating oil in (2).
1) Use a presser foot with a groove to fit the upper box (
1) and the lower box (2) by welding, respectively.

Moreover, FIG. 7 shows a partial sectional view of a combination with a main motor using the conventional gear box shown in FIG. 6 above.

In the figure, symbol (12) is a small gear mounted on the main motor shaft (19)K, (13) is a large gear mounted on the axle that meshes with the small gear (12), and (14) is a large gear mounted on the main motor shaft (19)K.
19) is a bearing stop that restrains the bearing (17) on the main motor shaft (19), and (15) is attached to the bearing box (20) that houses and supports the bearing (17) through the bearing a bearing box lid (1) that is attached and closes the end face of the bearing box (20);
6) is the boundary gap between the bearing stopper (14) and the bearing box lid (15), (18) is the grease for sliding the bearing (17), and (21) is the gear lubricating oil.

Next, the operation of this conventional device will be explained.

When the main motor (not shown) rotates, the small gear (12) attached to the end of the main motor shaft (19) rotates the large gear (13), and the rotation of the large gear (13) causes scraping. , the gear lubricating oil (21) is transferred to the gear box (11).
(It scatters in the 21. Therefore, this lubricating oil for both vehicles (21
) to prevent the gear box (1) from leaking to the outside.
2) and the bearing box lid (15) are felt (9) to (1).
1) Sealed by K.

[Problem that the invention seeks to solve]

Since the conventional gear box is constructed as described above, the gear lubricating oil scattered in the axial direction due to the meshing of the gears is distributed between the felt (9) and the bearing box lid located near the meshing of the gears. It easily flows out of the gear box (11 (2)) from between the bearing stop (14) and the bearing box lid (15), and enters the inside of the bearing box (2o) through the boundary gap (16) between the bearing stop (14) and the bearing box lid (15). It is mixed with the grease (1B) for lubrication of the bearing (17), and as a result, the quality of the grease is changed and the bearing lubrication function is deteriorated.
There was a problem in that it eventually led to a bearing seizure accident.

This invention was made in order to solve the above-mentioned problems, and it is possible to prevent gear lubricating oil from leaking outside, and also prevent it from entering the main motor bearing box, thereby protecting the bearings of the vehicle. The purpose is to obtain a hanging type main motor gear box.

[Means for solving problems]

The hanging type main electric motor/motor gear box for a vehicle according to the present invention includes:
The main motor shaft is attached to the inside of the gear box of a presser foot that is installed on the gear box wall and holds a sealing member to seal between the main motor bearing box lid on the small gear side and the gear box wall. A surrounding annular wall is provided, and the inner diameter of the annular wall is smaller than the boundary gap between the main motor bearing box cover, which is a non-rotating part, and the bearing stop, which is a rotating part. .

[For production]

In the hanging main motor gear box for a vehicle according to the present invention, the gap between the presser foot and the bearing box lid and the boundary gap are as follows:
An annular wall is provided to act as a protective wall against the gear meshing surface. Therefore, the scattering of gear lubricating oil due to the meshing of the gears is blocked by the annular wall and does not directly reach the presser foot and the bearing box cover. and the boundary gap is not reached, and as a result,
There was no leakage of gear lubricating oil to the outside or entry into the main motor bearing box.

〔Example〕

The present invention will be explained below based on the drawings showing one embodiment thereof.

In Figures 1 and 2, the code (22) is the presser foot (6
), it is an annular wall provided so as to surround the main motor shaft (2) toward the inside of the gear boxes (1) and (2), and its inner diameter surface is as shown in Fig. 2. ,felt(
9) is configured to have a smaller diameter than the inner diameter part and boundary gap.

In addition, the code|symbol (23) is an oil return hole which is an oil drainage hole provided in the bottom part, ie, the outer diameter side of annular wall (22).

Next, the operation of the above embodiment will be explained.

When the main motor rotates, the small gear (12) attached to the main motor shaft (19) rotates the large gear (13) meshing with it.

The gear lubricating oil (21) stored at the bottom of (1) and (2) in the gear box (2) is scraped up by this rotation and pumped up into the gear box (1).
1) (2) In some cases, the gear lubricating oil (21) adhering to the tooth surfaces of the small gear (12) and large gear (13) is scattered in the direction from between the tooth surfaces.

Bearing stop (14) which is the rotating part of this type of main electric motor field receiver
The boundary gap (16) between the bearing box cover (15) and the rotating part
) is located close to the meshing part of the gears, and this is unavoidable due to the equipment configuration. Therefore, the splattering gear lubricating oil (21) mentioned above will directly hit this boundary gap. Therefore, this boundary gap (21
) into the bearing box (20), or the felt (
9) leads to leakage to the outside from the seal portion.

In contrast, in the above embodiment, an annular wall is provided inside the presser foot (6) to serve as a protective wall against the float engagement surface, and the inner diameter of the annular wall is smaller than the boundary gap (16). Gear lubricant that scatters (21)
It is possible to prevent this from flowing outside and entering the bearing housing.

The gear lubricating oil that has entered the annular wall (22) is
The oil return hole provided at the bottom of the annular 4g (22)
23), it goes without saying that gearbox +11 (21 yen) will be returned.

In addition, in the above embodiment, the annular wall (22) is attached to the presser foot (6) with a dam, but this is not limited to this, and the gear box (
It may be attached to the wall of 11 (2), and the outer circumferential plate (22a) extending in the -center force direction and the side plate (22a) perpendicular to the axis
b) constitutes an annular wall (22), but the outer circumferential plate (22a) extending in the minute direction is not necessarily required, and furthermore, it is possible to further prevent the gear Il'al lubricant (21) from scattering and entering. Therefore, as shown in FIGS. 3 and 954, the annular wall (22) may be formed by bending the inner end thereof in the axial direction toward the main machine.

Further, in the above embodiment, an oil return hole (23) is provided at the outer diameter side end of the annular wall (22) as an oil drain hole for discharging gear lubricating oil that has entered the annular wall (22). However, as shown in Figures 3 to 5, this oil drain hole is
2) an opening formed in at least one of the outer circumferential plate (22a) and the side plate (22b) so that when the boundary gap (16) is projected in parallel, the projection is not projected onto the opening; (23a). That is, in FIG. 5, the opening (23a) has a boundary gap (
16) does not communicate directly in the axial direction, but has a boundary gap (16).
) is behind the side plate (22b), and the opening (23
a) is formed. Of course, this opening (23a
) in Figure 5 is not a straight line, but the boundary gap (16
) and concentric arcs.

〔Effect of the invention〕

As described above, according to the present invention, an annular wall surrounding the main motor shaft is provided inside the gear box of the presser foot for holding the seal member, and the inner diameter of the annular wall is the boundary between the bearing box cover and the bearing stop. Since the diameter is smaller than the gap, the spattered gear lubricating oil hits the annular wall and prevents it from leaking outside, or from entering the main motor bearing box, thus providing a safe suspension for vehicles with a long lubrication life. It has the effect of a type traction motor gear box.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing a gear box according to an embodiment of the present invention, FIG. 2 is a partial sectional view of a combination of the gear box shown in FIG. 1 and a main motor, and FIG. 3 is another embodiment of the invention. FIG. 4 is a partial sectional view of the combination K of the gear box and main motor in FIG. 3, FIG. 5 is a plan view of the opening in FIG. 3, and FIG. 6 is a conventional FIG. 7 is a perspective view showing the gear box, and FIG. 7 is a partial cross-sectional view of the combination of the gear box and main motor shown in FIG. 4. (1) Upper box of gear box, (2) Lower box of gear box, (6) to (8) Presser foot, (9) to (11) Seal member (felt), ( 12) ... Small gear, (13)
・Large gear, (14)・Bearing stop, (15)・Bearing box lid, (16)・Φ boundary gap, (17)・・Bearing, (1
9) Main motor shaft, (20) Bearing box, (21)
・Gear lubricating oil, (22)...Annular wall, (22a)...Outer peripheral plate, (22b)...Side plate, (23)...Oil drain hole (oil return hole), (23a)...Oil drain hole (Aperture). In each figure, the same reference numerals indicate the same or corresponding parts. Fig. 1 22- Annular wall 12- Small gear 13- Person 1!1 Heavy 14- Bearing stop 15-1 Monkey [13 Receiving box goose 5 16- Boundary gap 17- Bearing 19- Main power! M-shaft 20-1 bearing box 21-gear groove) 22o-1 Tato circumference 1-22b-1 I-norito 23- 袢ゆかん (Nadasusuana) Procedural amendment October 28, 1988

Claims (5)

[Claims] (1) In a gear box that is vertically divided into two parts by a plane that includes the axes of the main motor shaft and the large gear shaft, which is an axle, the main motor bearing on the small gear side attached to the main motor shaft The main motor shaft is installed inside the gear box of the presser foot that holds the sealing member installed on the gear box wall that seals between the bearing box lid that closes the gear side end face of the box and the gear box wall. A surrounding annular wall is provided, and the inner diameter of the annular wall is smaller than the boundary gap between the bearing box cover, which is a non-rotating part, and the bearing stop fixed to the main motor shaft, which is a rotating part. A suspended main motor gear box for a vehicle, which is characterized by: (2) The hanging type traction motor gear box for a vehicle according to claim 1, wherein the annular wall has an inner diameter end bent in the axial direction toward the traction motor. (3) The suspended main motor gear box for a vehicle according to claim 1 or 2, wherein the annular wall has an oil drain hole provided at its outer diameter end. (4) The suspended main motor gear box for a vehicle according to claim 3, wherein the oil drain hole is a normal oil return hole. (5) The oil drain hole is an opening formed in at least one of the side plate and the outer peripheral plate of the annular wall, and the boundary gap between the non-rotating part and the rotating part is aligned with the axis of the opening. The suspended main motor gear box for a vehicle according to claim 3, which is formed so as not to be projected in parallel.