JP2607500Y2 - Gear device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gear device used for a power bogie for a railway vehicle.

[0002]

2. Description of the Related Art A conventional gear device for a railway vehicle is shown in FIG. FIG. 4 shows a part of the gear device, wherein FIG. 4 (a) is a cross-sectional view, and FIG. 4 (b) is a side view of the spigot portion of the lid 2 in FIG. In FIG. 4A, the shaft 1 is supported on a gear box 4 by a bearing 3 via a lid 2. The oil drainer 5 has protrusions 5a and 5b provided opposite to two protrusions 2a provided on the inner periphery of the lid 2, and is fitted to the shaft 1. The oil drain 5 shakes off the oil flowing out of the bearing 3 and is collected in a groove 21 formed between the lid 2 and the oil drain 5. hole
It is returned to the gear box interior 4a via 22.

[0003]

In the gear device having such a structure, the lubrication of the bearing is completed, and the oil accumulated in the shaft sealing device of the lid is returned to the inside of the gear box by the oil drain hole.
In some cases, on the contrary, oil in the middle of the oil drain hole may flow backward to the shaft sealing device. It has been observed that this phenomenon occurs because the shaft sealing device side is in a negative pressure state from the oil drain hole outlet in the gear box. The present invention has been made in view of the above points, and an object of the present invention is to provide a gear device that prevents this phenomenon in which oil flows backward.

[0004]

Means for achieving the object are as described in claim 1, wherein a spigot portion (41) is formed between the gear box (4) and the bearing (3) to support the bearing (3). A shaft (1) horizontally supported by the bearing (3) is provided with a cover (6a) through which the cover (6a) is provided.
In (1), the oil drain hole passes through the outside and inside of the gear box (4) in the axial direction.
(62), a protruding portion (6h) protruding toward the shaft (1) is provided adjacent to the spigot portion (41), and the coaxial center of the spigot portion (41) is provided with the protruding portion. A spigot inner peripheral portion (6c) having an inner diameter inscribed in the oil drainage hole (62) is provided adjacent to the spigot portion (41), and has a through hole through which the shaft (1) passes. A small lid (6b) having a spigot part fitted with the spigot inner peripheral part (6c) and a protruding part (6k) protruding toward the shaft (1) adjacent to the spigot part, the small lid (6b) A slight clearance between the end face of the spigot part and the oil drain hole (62) of the lid (6a).
(6d) is provided and arranged, an oil drain (5) is fitted to the shaft (1),
Also, between the protrusions (5a) and (5b) of the oil drain (5) and the small lid
Provide a circumferential groove (61) for the oil sump between the spigot part (6m) of (6b),
The circumferential groove (61) communicates with the oil drainage hole (62) through the gap (6d), and a shaft sealing device is constituted by these.

[0005] In claim 2, a bearing (3) is supported by forming a spigot (71) between the gear box (7) and the shaft (1) horizontally supported by the bearing (3). With a penetrating lid (6a),
A circumferential groove (61) is formed in the inner peripheral portion of the shaft sealing device portion adjacent to the spigot portion of the lid (6a), and penetrates the spigot portion at the lower portion of the lid (6a). An oil drainage hole (62) communicating with the inside of the gearbox (7) is provided, and the spigot (7) of the gearbox (7) of the lid (6a) is provided.
A notch (63) communicating with the outer peripheral surface of the spigot and the oil drain hole (62) is provided, and the gear box (7) is positioned at a position corresponding to the notch (63) of the gear box (7). A notch (72) communicating the inner periphery of the spigot and the inside of the gear box is provided, an oil drain (5) is fitted to the shaft (1), and the oil drain (5) is inserted into the circumferential groove (61). ), And a shaft seal device is constituted by these components.

According to the third aspect of the present invention, the bearing (3) is supported by forming a spigot (41) between the gear box (4) and the shaft (1) horizontally supported by the bearing (3). A cover (6a) having a through hole therethrough, and a gearbox (from the bottom of a circumferential groove (61) formed in the inner periphery of the shaft sealing device portion adjacent to the spigot portion (41) of the cover (6a). 4) Oil drain hole communicating with the inside of (62)
Is formed under the spigot portion (41) of the lid (6a), wherein the spigot portion (4) of the lid (6a) is provided.
A groove (64) having a predetermined depth is provided on the outer periphery of (1) so that the groove (64) is closed by the inner peripheral surface of the gear box spigot portion when the groove (64) is mounted on the gear box (4). )
And the oil drain hole (62) communicate with each other, and a groove (64) is formed in a portion of the lower portion of the gear box spigot portion opposite to the groove (64).
A notch (42) communicating with the inside of the gearbox (4) is provided, and a hole (66) is provided on the upper part of the spigot part (41) of the lid (6a) similarly to the oil drain hole (62), A gear device characterized in that a stopper (65) for closing the hole (66) is attached to the inner side of the gear box of the lid (6a).

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

1 (a) and 1 (b) show an embodiment of a gear device according to claim 1 of the present invention, FIG. 1 (a) is a sectional view thereof, and FIG. 1 (b) is a sectional view of FIG. () Is a side view of the spigot part of the lid part in the direction of arrows AA in FIG. The shaft 1 is supported by the gear box 4 via the bearing 3 and the cover 6, and the oil lubricating the bearing 3 is shaken off by the oil drain 5 and collected in a groove 61 provided in a part of the cover 6. ,groove
The structure in which the oil collected in 61 is returned to the inside of the gear box 4a by the oil drain hole 62 is the same as the conventional one. The present invention has a structure in which a lid 6a and a small lid 6b are separated from each other in place of the conventional lid 2, and the spigot portion of the small lid 6b reaches the vicinity of the inlet of the oil drain hole 62 to some extent with respect to the oil drain hole 62. It is a shield with a gap. Further, the inner peripheral portion of the spigot portion of the small lid 6b is provided so as to secure a slight gap with the outer peripheral portion of the lid 6a opposed thereto. That is, in FIGS. 1A and 1B, the gear box 4
A spigot part 41 is formed between the shaft 1 and the spigot part 41.
A bearing 6 fitted to the shaft 1 and a lid 6a through which the shaft 1 horizontally supported by the bearing 3 penetrates. The lid 6a In addition, an oil draining hole 62 is provided through the gear box 4 in the direction of the outside and the inside thereof, and a protruding portion 6h protruding toward the shaft 1 is provided adjacent to the spigot portion 41. In addition, a spigot inner peripheral portion 6c whose inner diameter is inscribed in the oil drainage hole 62 is provided adjacent to the spigot portion 41. A spigot part that has a through hole through which the shaft 1 penetrates and that fits with the spigot inner peripheral part 6c
Small lid 6 having a protruding portion 6k protruding toward the shaft 1 adjacent to 6m
b is provided. Then, the end face of the spigot 6m of this small lid 6b and the lid
A slight gap 6d is provided between the oil drain hole 62 of FIG.
A shaft 5 has a protrusion 5 opposed to the protrusion 6h, 6k.
The oil drain 5 provided with b is fitted. Also, between the projecting portions 6h and 6k of the oil drainer 5 and the spigot portion 6m of the small lid (6b) as shown in FIG.
A circumferential groove (61) for an oil sump similar to the above is provided, and these constitute a shaft sealing device of a gear device.

The function is as follows. By providing a shield (small lid (6b)) near the entrance of the oil drain hole 62, when the groove 61 is in a negative pressure state, the oil drain hole 62 is intermittently urged. It suspends the oil that flows well and stops it. That is, the cause of the backflow of the oil from the oil drain hole 62 to the circumferential groove 61 is that before entering the tunnel, the inside of the gear box 4a and the groove 61 are at the same pressure as the external pressure. This phenomenon occurs because the surroundings are placed under negative pressure, the inside of the gear box 4a in a sealed state is the external pressure before entering the tunnel, and the groove 61 is the negative pressure on the outer periphery of the gear box 4 so that this phenomenon occurs. In the lower layer of the oil drainage hole 62, oil gently returns to the inside of the gear box 4a from the shaft sealing device side, and this amount is shaken off by oil drainage. Oil leakage from the shaft sealing device can be prevented.

Next, a second embodiment of the present invention will be described with reference to FIG.
It will be described based on. 2 (a) and 2 (b), one of the differences from the conventional FIG. 4 is that a notch 72 is provided in the spigot 71 of the gear box 7. A notch 63 communicating with the oil drain hole 62 is provided near the outlet of the oil drain hole 62 inside the gear box 7a in the outer peripheral direction of the spigot part of the cover part 6. The other parts are similar to FIG.

To explain the operation, the groove 61 is notched 72
And the notch 63 that communicates with the oil drain hole 62, air is sucked through the notch portion 72 and the notch 63, and the oil in the oil drain hole 62 slightly flows back into the groove 61. However, it does not become large and prevents oil leakage.

FIG. 3 is a diagram showing a third embodiment of the present invention. In the present invention, a groove 64 having a predetermined depth is provided on the outer periphery of the spigot portion of the lid 6a, and a hole 66 is provided at an upper portion of the groove 64, and the hole 66 communicates with the groove 61. The opening formed inside the gear box 4 in the hole 66 is closed by a stopper 65. This groove
64 is provided so as to be closed by the inner peripheral surface of the gear box spigot portion when the cover 6a is mounted on the gear box 4, and communicates with the oil drain hole 62. A notch 42 that communicates the groove 64 with the inside of the gear box 4 is provided in the opposing portion. The oil drain hole 62 is provided at the lower portion of the lid 6, and an oil film may be formed so as to cover the oil drain hole 62 when the gear device is rotating. On the other hand, the hole 66 is located on the upper part of the lid portion 6 and there is little possibility that an oil film is formed in the hole 66 even in the above state. The effect is that when the groove 61 becomes negative pressure, the internal air and the external air of the gear box are equalized through the hole 66 where the oil film is difficult to be formed, without passing through the oil drain hole 62 where the oil film is closed. Things. Therefore, by providing the groove 64 and the hole 66, the effect of preventing oil leakage can be more expected than that of the second aspect.

[0012]

According to the present invention as described above, according to the first aspect of the present invention, the oil accumulated in the shaft seal unit is intermittently connected from the outlet of the oil drain hole 62 to the inlet to return the oil to the inside of the gear box 4a. The momentum of the oil flowing backward can be stopped at the tip of the spigot portion of the small lid 6b. According to the invention of claim 2, when a negative pressure is applied, a large amount of oil flows backward due to the notch 63 and the notch 72 even though the backflowed oil may flow back to the groove 61 to some extent. Can be prevented. Further, in the device of the third aspect, the provision of the groove 64 and the hole 66 has a further effect of preventing oil leakage as compared with the second aspect. Therefore, the gear device of the present invention is less apt to leak oil to the outside, and is highly practical.

[Brief description of the drawings]

FIGS. 1 (a) and 1 (b) show an embodiment according to claim 1 of the present invention. FIG. 1 (a) is a sectional view thereof, and FIG.
FIG. 1 (b) is a view showing A-
It is a side view in the direction of the arrow A.

2 (a) and 2 (b) show an embodiment according to claim 2 of the present invention. FIG. 2 (a) is a cross-sectional view of FIG.
FIG. 2B is a side view of the spigot portion of the cover 6 and the spigot portion 71 of the gear box in the direction of arrows AA in FIG.

3 (a) and 3 (b) show an embodiment according to claim 3 of the present invention. FIG. 3 (a) is a sectional view thereof, and FIG.
FIG. 3B is a side view of the spigot portion of the cover 6 and the spigot portion 41 of the gear box in the direction of arrows AA in FIG.

4 (a) and 4 (b) show an example of the related art, where FIG. 4 (a) is a sectional view thereof, and FIG. 4 (b) is FIG. 4 (a).
5 is a side view of the spigot portion of the lid 2 in the direction of the arrow AA.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 shaft 2 lid 21 groove 22 oil drain hole 23 notch 21a hole entrance 21b hole exit 3 bearing 31 bearing outer ring 4 gear box 41 gear box spigot 42 notch 5 oil drain 6 lid 61 groove (shaft) Sealing device) 62 Oil drain hole (hole) 63 Notch 64 Groove 65 Plug 66 Hole 6a Lid (body) 6b Small lid 6c Inner inner peripheral portion 6d Gap 7 Gear box 71 Inlet portion 72 Notch portion

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) F16H 57/04

Claims (3)

(57) [Scope of request for utility model registration] 1. A spigot part (41) between a gear box (4) and a gear box (4).
And a lid (6a) through which the shaft (1) horizontally supported by the bearing (3) penetrates, and the lid (6a) has a lower spigot ( An oil drain hole (62) is provided in the gear box (4) through the outside and inside of the gear box (4) in the axial direction, and a protrusion ( 6h), and an inner peripheral portion (6c) of which inner diameter is inscribed in the oil draining hole (62) adjacent to the spigot portion (41) on the same axis center as the spigot portion (41). ), And has a through hole through which the shaft (1) penetrates, and projects toward the shaft (1) side adjacent to the spigot portion fitted with the spigot inner peripheral portion (6c) and the spigot portion. The small lid (6b) having the projecting portion (6k) is provided with a slight gap (6d) between the spigot end face of the small lid (6b) and the oil drain hole (62) of the lid (6a). The shaft (1) is fitted with an oil drain (5). A circumferential groove (61) for an oil reservoir is provided between the protrusions (5a) and (5b) and the spigot portion (6m) of the small lid (6b), and the circumferential groove (61) defines the gap (6d). A gear device characterized in that it communicates with an oil drainage hole (62) through a shaft seal device. 2. A cover through which a bearing (3) is formed by forming a spigot part (71) between the gear box (7) and a shaft (1) horizontally supported by the bearing (3). (6a), a circumferential groove (61) is formed in the inner peripheral portion of the shaft sealing portion adjacent to the spigot portion of the lid (6a), and the circumferential groove (61) penetrates the lower spigot portion of the lid (6a). An oil drainage hole (62) communicating from the groove (61) to the inside of the gear box (7) is provided, and the outer peripheral surface of the spigot facing the spigot part (71) of the gear box (7) of the lid (6a) and the oil drainage hole A notch (63) communicating with the gear box (62) is provided, and the gear box (7) is located at a position corresponding to the notch (63) of the gear box (7).
Notch (7) that communicates the inner circumference of the
2), an oil drain (5) is fitted to the shaft (1), and the oil drain (5) is opposed to the circumferential groove (61), thereby forming a shaft sealing device. Gear device. 3. A spigot part (41) between the gearbox (4) and the gearbox (4).
And a lid (6a) having a through-hole through which the shaft (1) horizontally supported by the bearing (3) penetrates, and a spigot portion (6) of the lid (6a). An oil drain hole (62) communicating with the inside of the gear box (4) from the bottom of a circumferential groove (61) formed in the inner peripheral portion of the shaft sealing portion adjacent to 41) is inserted into the spigot portion of the lid (6a). In the gear device formed at the lower part of (41), a groove (64) having a predetermined depth is mounted on the outer periphery of the spigot part (41) of the lid (6a) when the gear box (4) is mounted. Groove (6
4) is provided so as to be closed by the inner peripheral surface of the gearbox spigot portion, the groove (64) and the oil drain hole (62) communicate with each other, and the groove (64) at the lower portion of the gearbox spigot portion.
A notch (42) communicating the groove (64) with the inside of the gear box (4) is provided in a portion opposite to the groove (64). Like the oil drain hole (62), a notch (41) of the lid (6) is formed. Make a hole (66) at the top,
A gear device characterized in that a plug (65) for closing the hole (66) is attached to the inner surface of the gear box inside the lid (6a).