JPH0435214Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a final reduction gear with an oil pump used in a vehicle.

[Prior Art] For example, in the tandem type final reduction gear A1 of the rear and front axles shown in FIGS. A third differential, so-called third differential B3, is provided for differential distribution between the second differential (not shown but referred to as B2). This third differential B3
Due to its configuration, it is disposed apart above and in front of the first differential B1, so it cannot be lubricated by the same lubricating device as the first differential B1. In addition. Regarding differential lubricating devices, the present applicant has disclosed Japanese Utility Model Publication No. 55-48215,
This was proposed in Utility Model Application Publication No. 58-99551.

Therefore, in order to lubricate the third differential B3, the bottom of the first differential B1 side of the carrier cover C and the third differential B3 side, that is, the upper side, are communicated through an oil passage 1.
An oil pump D attached to the carrier cover C is interposed therein, and in the illustrated example, this oil pump D is driven by a drive pinion gear 4 via a gear train 5 to force oil delivery. That is, oil enters the oil suction port 2 of the oil passage 1 and the suction port (Fig. 3) of the oil pump D opposite thereto, causing the drive gear 10 and the driven gear 11 to rotate in the normal direction (the meshing portions of both gears move downward). ), the oil is discharged from the discharge port O to the oil discharge port 3 of the oil passage 1 facing thereto.

By the way, in a four-wheel drive vehicle such as a snowplow, driving force is distributed between the front and rear axles from a transfer (not shown), so the propeller shaft for the front axle (not shown) rotates in the opposite direction with respect to the propeller shaft for the rear axle (not shown). Furthermore, the propeller shaft for the front axle is
A gear 8, which is directly connected to the companion flange 6 and fixed to the third differential B3, has a symmetrical configuration as shown in FIG.
The drive pinion gear 4 is reversely driven as described above via the idle gear and gear 9, which are not shown. Therefore, third differential B3, gears 8 and 9
A lubricating device such as an idle gear is required, but the oil pump D is reversed and the suction port and discharge port are reversed, making it impossible to supply oil through the oil passage. Therefore, a reversing pump for reversing and sending oil upward and a carrier cover for mounting the pump are required as separate members.

[Purpose of the invention] Therefore, an object of the present invention is to provide a final reduction gear with an oil pump that allows the oil pump and the carrier cover to be used in common, regardless of the rotational direction of the oil pump.

[Structure of the invention] According to the invention, in a final reduction gear with an oil pump in which an oil pump driven by an internal member is attached to the carrier cover of the final reduction gear, the oil suction port of the carrier cover is opened in accordance with the rotational direction of the oil pump. A first flow path that communicates a first inlet facing the oil pump with a first outlet facing the suction port of the oil pump, and a second inlet facing the oil pump discharge port communicating with the oil in the carrier cover. A connector is interposed between the carrier cover and the oil pump, and has a second flow path communicating with a second outlet opposite to the discharge outlet.

[Operation and effect of the invention] Therefore, depending on the rotation direction of the oil pump,
The oil suction port of the carrier cover can be communicated with the suction port of the oil pump via the spacer, and the discharge port of the oil pump can be communicated with the oil discharge port of the carrier cover. As a result, the oil pump and the carrier cover can be shared regardless of the rotational direction of the oil pump, which is extremely convenient and reduces costs.

[Examples] Examples of the present invention will be described below with reference to the drawings.

Portions in FIG. 1 that correspond to those in FIG. 6 are given the same reference numerals and redundant explanation will be omitted.

In Fig. 1, a connector E is interposed between the carrier cover C and the oil pump D, and this connector F has a connector E1 when the oil pump D rotates in the normal direction and a connector E2 when the oil pump D rotates in the reverse direction. Two types are available.

FIGS. 2 and 3 show the forward rotation connector E1. Connector E1 has carrier cover C.
A straight first flow path 12 that communicates with a first inlet 13 facing the oil suction port 2 of the oil pump D and a first outlet 14 facing the suction port of the oil pump D.
, a second inlet port 16 facing the discharge port O of the oil pump D, and an oil discharge port 3 of the carrier cover C.
A second flow path 15 is formed which communicates with a second outlet 17 facing the. Therefore, when the oil pump D rotates normally, oil is sucked into the oil pump D from the oil suction port 2 of the carrier cover C through the first flow path 12, and is sucked into the oil pump D through the second flow path 15. It is discharged to the oil discharge port C and is forced upward.

4 to 7 show a connector E2 for reversing. In this case, it is obvious that the suction port and discharge port O of the oil pump D are reversed from those shown in FIG. Connector E2 has carrier cover C.
A first flow path 18 that communicates a first inlet 19 facing the oil suction port 2 of the oil pump D with a first outlet 20 facing the oil pump suction port, and a first flow path 18 facing the discharge port O of the oil pump D. A second inlet 22 facing the oil outlet 3 of the carrier cover C and a second inlet 22 facing the oil outlet 3 of the carrier cover C
A second flow path 21 is formed which communicates with the outlet 23 of.

The first flow path 18 includes an arcuate groove 18a extending upward from the first inlet 19 and a first outlet 2.
It consists of an arc-shaped groove 18c extending downward from 0 and a straight elliptical through-hole 18b that communicates both grooves. The second flow path 21 is connected to the second inlet 2
an arc-shaped groove 21a inside the groove 18a extending upward from the second outlet 23; and an arc-shaped groove 22 inside the groove 18c extending downward from the second outlet 23.
c, and a perpendicular elliptical through hole 2 that communicates both grooves.
It consists of 2b. Therefore, when the oil pump D reverses rotation, oil is sucked into the oil pump D from the oil suction port 2 of the carrier cover C via the first flow path 18, and is sucked into the oil pump D via the second flow path 21. It is discharged to the discharge port 3 of.

In this way, by simply using the connector E1 when the oil pump D rotates in the normal direction and replacing the connector E1 with the connector E2 when the oil pump D rotates in the reverse direction, the oil pump D and the carrier cover can be shared regardless of the rotation direction of the oil pump D. can do.

[Summary] As explained above, according to the present invention, a spacer is used depending on the rotational direction of the oil pump, and the oil pump and carrier cover of a final reduction gear with an oil pump are made common regardless of the rotational direction of the oil pump. be able to.

[Brief explanation of the drawing]

Fig. 1 is a side sectional view showing the essential parts of an embodiment of the present invention, Fig. 2 is a front view showing the carrier cover mounting surface of the forward rotation connector, and Fig. 3 is the M-N-O shown in Fig. 2.
-P line arrow sectional view, Figure 4 is a front view showing the carrier cover mounting surface of the reversing connector, Figure 5 is the 4th
A-B-C-D-E-F line arrow sectional view of the figure, No. 6
The figure is a front view showing the pump mounting surface of the reversing connector, FIG. 7 is a sectional view taken along the line G-H-I-J-K-L in FIG. 6, and FIG. 8 is a side sectional view showing the conventional device. ,
FIG. 9 is a front view, and FIG. 10 is a front view showing essential parts of the carrier cover. C...Carrier cover, D...Oil pump,
E1... Connector for forward rotation, E2... Connector for reverse rotation, 12, 18... First flow path, 15, 21...
Second flow path.

Claims (1)

[Scope of utility model registration request] In a final reducer with an oil pump, in which an oil pump driven by an internal member is attached to a carrier cover of the final reducer, a first inlet that faces an oil suction port of the carrier cover according to the rotational direction of the oil pump and an oil pump. a first flow path communicating with a first outflow port facing the suction port of the oil pump, a second inflow port facing the discharge port of the oil pump, and a second outflow port facing the oil discharge port of the carrier cover; A final reduction gear with an oil pump, characterized in that a connector forming a second flow path communicating with the oil pump is interposed between the carrier cover and the oil pump.