JPH0625654U - Lubrication device for transfer - Google Patents

Abstract

(57) [Abstract] [Purpose] The bearing and oil seal of the rear drive shaft of the transfer can be sufficiently lubricated to prevent seizure. Constitution: A blade 6 provided on a locking sleeve 42 of a differential mechanism 26 in an output gear 18 of a transfer
8 scrapes up the oil in the oil storage space 56,
This oil is received in the oil receiver 70. The oil in the oil receiver 70 is stored in the oil passage 7 in the rear cover 52.
Oil seal 5 on the rear drive shaft 40 through 2
8 and the oil seal 58 is lubricated. Further, in the process of returning the oil from the oil seal 58 to the oil storage space 56, the oil passes through the bearing 48 that supports the rear drive shaft 40, and the bearing 48 is lubricated.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a transfer lubricating device for distributing driving force from an engine to front and rear wheels of a four-wheel drive vehicle, and more particularly to a transfer lubricating device for lubricating a roller bearing supporting a rear drive shaft of a transfer. It is about improvement.

[0002]

[Prior art]

 This type of transfer consists of an output gear that receives power from a transmission via an input gear and an idler gear, a front drive shaft and a rear drive shaft to which power is distributed from this output gear through a differential mechanism, and a differential drive. It consists of a locking sleeve that is slidably mounted on the rear drive shaft to lock the mechanism.The bearing that supports the rear drive shaft is the oil storage space that is provided close to this bearing. The oil accumulated inside is scraped up with a locking sleeve and lubricated.

[0003]

[Problems to be solved by the device]

 However, it is not sufficient to lubricate the bearings that support the rear drive shaft with only the oil that is lifted up by the rotation of the locking sleeve that locks the differential mechanism, and insufficient lubrication of the bearings can cause seizure. There is a possibility that the oil seal may not be sufficiently spread over the oil seal, and the oil seal may be burnt and its life may be shortened.

An object of the present invention is to provide a transfer lubrication device capable of avoiding the above-mentioned problems and sufficiently lubricating the bearing and oil seal of the rear drive shaft to prevent seizure thereof. .

[0005]

Means for Solving the Problems In order to solve the above problems, the present invention provides an output gear that receives power from a transmission through an input gear and an idler gear, and power is distributed from the output gear through a differential mechanism. Provided close to the bearing that supports the rear drive shaft of the transfer, which consists of the front drive shaft, the rear drive shaft, and a locking sleeve that is slidably mounted on the rear drive shaft to lock this differential mechanism. In a transfer lubrication device that accumulates oil in the stored oil storage space and lubricates this bearing, the blades that are provided on the locking sleeve to scrape up the oil in the space and the oil scraped up by this blade The oil receiver to receive and this oil receiver And to provide a lubricating device for Toransufu §, characterized in that it comprises the oil in the oil receiver extends to the oil seal of the rear drive shaft from the oil passage leading to the oil sheath through the rear cover.

[0006]

[Action]

 In this way, the blades provided on the locking sleeve scrape up the oil in the oil storage space, receive the oil scraped up by the blades, pass through the oil passage in the rear cover, and pass through the oil passages in the rear drive shaft. When the oil is introduced into the seal, the oil seal is lubricated, so that the oil seal is not seized and its life can be improved. Further, since the oil that passes through the bearing that supports the rear drive shaft is returned in the process of returning the oil from the oil seal to the oil storage space, the lever bearing can be sufficiently lubricated.

[0007]

【Example】

 An embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 shows a transfer 12 provided with a lubricating device 10 according to the present invention, the transfer 12 being an input gear 14 for receiving power from a transmission (not shown). And a gear case 20 accommodating an idler gear 16 that meshes with the input gear 14 and an output gear 18 that meshes with the idler gear 16, and a front mounted so as to close the open front end face and rear end face of the gear case 20, respectively. It consists of a cover 22 and a rear cover 24.

A differential mechanism 26 is incorporated in the output gear 18. The differential mechanism 26 includes a differential case 28, a spider 30, and a differential pinion 32, and is connected to the front drive shaft 38 and the rear drive shaft 40 from the differential pinion 32 via front and rear side gears 34 and 36, respectively. In FIG. 2, reference numerals 44 and 44 'denote taper roller bearings that support the differential case 28, and reference numerals 46 and 48 rotatably support the front drive shaft 38 and the rear drive shaft 40 to the front cover 50 and the rear cover 52, respectively. It is a ball bearing, and reference numeral 54 is a coupling of the rear drive shaft 40.

Therefore, the driving torque from the transmission is transmitted to the output gear 18 via the input gear 14 and the idler gear 16, and the spider 30 is rotated from the output gear 18 via the differential case 28 to the spider 30. It is transmitted to the differential pinion 32. The front drive shaft 38 is driven from the differential pinion 32 via the side gear 34, and the rear drive shaft 40 is driven from the differential pinion 32 via the side gear 36.

A locking sleeve 42 is slidably provided to straddle the rear drive shaft 40 and the differential case 28 to lock the differential mechanism 26. The sleeve 42, the rear drive shaft 40, and the differential case 28 have dogs 42a, 40a, and 28a that mesh with each other, and can interlock in the rotational direction. The locking sleeve 42 is normally located on the rear drive shaft 40 apart from the differential mechanism 26, as shown in FIG. 1, and in this position, the differential function of the differential mechanism 26 is activated. When the locking sleeve 42 is shifted to the left in FIGS. 1 and 2 so as to straddle the rear drive shaft 40 and the differential case 28, the rear drive shaft 40 and the differential case 28 are integrated to form the differential mechanism 26. Locked. At this position, the front drive shaft 38 and the rear drive shaft 40 rotate integrally without the differential mechanism 26 working.

The transfer lubrication device 10 seals the oil storage space 56 provided near the ball bearing 48 that supports the rear drive shaft 40 in the gear case 20 on the rear cover 52, and the oil storage space 56. As described above, the oil seal 58 provided between the rear cover 52 and the coupling 54 of the rear drive shaft 40 is provided. As shown in FIG. 3, the oil seal 58 includes a metal ring 60 engaged in the seal mounting annular recess 52a of the rear cover 52, a rubber ring 62 bonded to the metal ring 60, and a rubber ring 62. A coil spring 64 is provided on the outer circumference of the ring 62 and presses the rubber ring 62 against the coupling 54. In FIGS. 1 and 2, reference numeral 66 is a dust cover attached to the coupling 54 and arranged inside the annular recess 52b outside the annular recess 52a.

The transfer lubrication device of the present invention includes a blade 68 provided on the locking sleeve 42 to scrape oil in the oil storage space 56, and a blade 68 provided on the inner surface of the gear case 20 to scrape oil. An oil receiver 70 that receives oil, and an oil receiver 70 that extends from the oil receiver 70 through the inner flange 20a of the gear case 20 and the rear cover 52 to the oil seal 58 of the rear drive shaft 40 to guide the oil in the oil receiver 70 to the oil sheath 58. It is composed of an oil passage 72. The oil passage 72 is formed so as to open above the annular recess 52a that houses the oil seal 58 so that oil is applied to the entire ball bearing ring 48.

Next, referring to the operation of the transfer lubricating apparatus 10 of the present invention, when power is transmitted from the transmission 12 to the transfer 12, the output gear 18 is driven via the input gear 14 and the idler gear 16, Power is distributed to the front drive shaft 28 and the rear drive shaft 30 to drive four wheels. When the rear drive shaft 30 rotates, the locking sleeve 42 also rotates, and this rotation causes the blades 68 to scrape up the oil in the oil storage space 56 and collect the oil in the oil receiver 70.

The oil in the oil receiver 70 is supplied to the oil seal 58 through the oil passage 72 to lubricate the oil seal 58. The oil thus supplied to the oil seal 58 lubricates the ball bearing 48 that supports the rear drive shaft 30, passes through the space between the rear drive shaft 30 and the rear cover 52, and enters the oil storage space 56. Will be returned.

[0015]

[Effect of device]

 According to the present invention, as described above, the blade provided on the locking sleeve of the differential mechanism scrapes up the oil in the oil storage space and receives the oil scraped up by the blade from the oil receiver to the rear cover. Since the oil is guided to the oil seal of the rear drive shaft through the internal oil passage, the oil seal will not be lubricated and seizure will not occur in the oil seal, and the life of the oil seal can be improved. Since the oil that flows from the oil back to the oil storage space passes through the bearing that supports the rear drive shaft, it is practically possible to sufficiently lubricate this bearing.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a transfer equipped with a lubricating device according to the present invention.

FIG. 2 is an enlarged cross-sectional view of the essential parts of the lubricating device of the present invention.

FIG. 3 is an enlarged sectional view of an oil seal lubricated according to the present invention.

FIG. 4 is an enlarged perspective view showing blades of a locking sleeve used in the present invention.

[Explanation of symbols]

 10 Transfer Lubrication Device 12 Transfer 14 Input Gear 16 Idler Gear 18 Output Gear 20 Gear Case 22 Front Cover 24 Rear Cover 26 Differential Mechanism 28 Differential Case 28a Dog 30 Spider 32 Differential Pinion 34 Side Gear 36 Side Gear 38 Front Drive Shaft 40 Rear Drive Shaft 42 Lock Sleeve 44 Roller bearing 44 'Roller bearing 46 Ball bearing 48 Ball bearing 50 Front cover 52 Rear cover 54 Coupling 56 Oil storage space 58 Oil seal 60 Metal ring 62 Rubber ring 64 Coil spring 66 Dust cover 68 Blade 70 Oil receiver 72 Oil passage

Claims (1)

[Scope of utility model registration request] 1. An output gear receiving power from a transmission via an input gear and an idler gear, and a front drive shaft and a rear drive shaft to which power is distributed from the output gear via a differential mechanism, and the differential mechanism are locked. And a bearing for storing oil in an oil accumulating space provided close to a bearing for supporting the rear drive shaft of the transfer including a locking sleeve slidably provided on the rear drive shaft. In a transfer lubrication device for lubricating oil, a blade provided on the locking sleeve for scraping oil in the oil storage space, an oil receiver for receiving the oil scraped by the blade, and a rear cover from the oil receiver. Pierce through the rear dray A transfer lubrication device comprising: an oil passage that extends to an oil seal of an Eve shaft and guides oil in the oil receiver to the oil sheath.