JPS63308269A - Lubricating device for transfer - Google Patents

Abstract

PURPOSE:To prevent an abnormal temperature rise of lubricating oil by scraping up lubricating oil in a transfer case by a tooth surface to be fed into a lubricating oil collecting chamber and lubricating a rotary sliding portion through a supply pipe when the internal pressure in the transfer case increases. CONSTITUTION:When gears 5, 6 built in a front transfer case 2 are driven, lubricating oil scraped up to be carried in the rotating direction is continuously fed into a lubricating oil collecting chamber 10 disposed at the upper portion of a partition wall 9 and filled therein. During operation, when the pressure in the transfer case 2 increases, lubricating oil in the collecting chamber 10 is supplied to a bearing 7 separating from the lubricating oil lever according to an increase in pressure through a supply pipe 13. Thus, the lubricating oil is kept from generating heat due to a large oscillation or collision in its supply process, so that abnormal temperature rise can be prevented.

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to an Ic transfer in which a built-in gear is rotatably housed, and in particular, it is possible to lubricate the rotating sliding part using the pressure inside the transformer 77 case. Transfer lubrication '4A
Regarding the location.

[Prior Art] FIG. 3 shows a transfer that transmits driving force from a vertical input shaft to a horizontal output shaft.

As shown in the figure, the driving force entering from the vertical axis a is
The signal is transmitted from a bevel gear b fixed to the output end of the vertical shaft a to a bevel gear d fixed to the input end of the horizontal shaft C, thereby rotating the horizontal shaft C. The horizontal axis C has a transmission gear f, Q, which meshes with the transmission gear f, Q of the transmission shaft e, which is provided parallel to the horizontal axis C, and the transmission gear m, i, is spline-fitted on the horizontal axis C. Match. J moves the shift arm k in the horizontal direction to set the gear tooth fl! h.

This is a shift fork that is fitted into a spline formed on the outer periphery of a boss 1, and selects a speed change gear fitted with the spline as a speed change gear. ( is the front drum, m is the breather.

[Problem to be Solved by the Invention 1] By the way, in the above-mentioned transfer, the lubricating oil is stored in the lower part of the transfer case so that the transmission gear and the rotating sliding part of the horizontal shaft can be lubricated. The liquid level is set at an appropriate height, but if the liquid level is too high, there will be a loss of drive resistance, so the rotation tank i! 1lf
For the i5, lubricating oil sucked in by an oil pump is sprayed onto its rotating and sliding parts to provide lubrication and ensure normal function.

However, when heavy lubrication is applied using an oil pump in this way, the lubricating oil sometimes generates heat due to collision of the lubricating oil, which accelerates the deterioration of the lubricating oil and causes damage to the oil seal. This is a problem because of the

Furthermore, since this oil pump itself would increase the cost of transfer, there was a desire for a proposal that would enable lubrication of the vertical shaft without an oil pump.

[Means for Solving the Problems] The purpose of the present invention is to solve the above-mentioned problems. A gear, a supply pipe for supplying lubricating oil to the rotating sliding part at a position separated from the liquid level of the lubricating oil, and a supply pipe that surrounds the south face of the built-in gear along the rotational direction and scratches with its tooth surface. A transfer lubricating device is constructed from a lubricating oil collector that sends the raised lubricating oil to the supply pipe by the pressure inside the case, and is a means for solving the problem.

[Function] The built-in gear scrapes up the R4 lubricating oil inside the transformer 77 case with its tooth surface while rotating, and sends the scraped up lubricating oil to the lubricating oil collection chamber. The lubricating oil collection chamber is continuously fed and filled with lubricating oil, and when the internal pressure of the transfer case increases, the lubricating oil is sent to the supply pipe by that pressure, and the lubricating oil is sent away from the liquid level of the lubricating oil. The rotating sliding parts of the position are lubricated. In this way, the lubricating oil does not generate heat due to large shifts or collisions during its supply process, so an abnormal rise in the lubricating oil temperature is prevented.

Embodiment 1 A preferred embodiment of the present invention will be described below with reference to the accompanying drawings.

Reference numeral 1 shown in FIG. 1 is a transfer case, and the transformer 77 case 1 is divided into a front transfer case 2 and a rear transfer case 3. In the connected state, the transfer case 1 is hermetically sealed inside. Reference numeral 4 denotes a drive shaft which is rotatably supported horizontally on the trunk case 1, and built-in gears 5 and 6 are provided on the output end side of the drive shaft 4 at intervals in the axial direction. 7 is vertical axis 1
This bearing rotatably supports the vertical shaft 14.
It constitutes a 0 rotation sliding part.

Now, the upper inner surface 2a of the front transfer case 2
A built-in gear whose tooth surfaces can scrape up lubricating oil from the lubricating oil surface 8 below, or a front transformer 77 that faces the tooth surfaces 5a of the built-in gear 5 having a large number of teeth in the embodiment. A partition wall 9 is provided on the inner surface of the case 2 at a position sandwiching the inner surface (not shown), extending toward the axis of the built-in gear 5 and as close as possible to both side surfaces 5b of the built-in gear 5. provided. This partition wall 9 is formed to have a length from the inside of the lubricating oil surface 8 created by at least a certain amount of lubricating oil to the front and rear of the upper inner surface of the front transfer case 2 along the inner circumferential direction of the built-in gear 5. . On the other hand, on the inner surface of the front transfer case 2 facing the tooth surface 5a of the built-in gear 5, the inner surface along the partition wall 9 is concave or 5-shaped so as to have a slight clearance with respect to the tip circle of the built-in gear 50. will be established.

Therefore, by rotating the built-in gear 5, most of the scraped up lubricating oil is carried to the upper side of the front transformer 77 case 2.

Here, a lubricating oil collecting chamber 10 is provided above the partition wall 9 to sequentially collect the lubricating oil drawn up and transported. In the embodiment, the lubricating oil collection Tl 10 has a box-shaped space 11, for example, and has an opening 12 for introducing the lubricating oil splashed up by the built-in tooth width 5 into the space 11. It is formed.

By doing so, the space 11 will be filled with lubricating oil.

Further, the bearing portion 19 and the lubricating oil collection chamber 10 are connected by a supply pipe 13 through which lubricating oil passes.

By the way, as shown in FIG. 2, one of the bearing parts surrounding the bearing 7 has a ring-shaped ring on the upper end surface 21a of the thrust collar member 21 that presses the outer races 7a and 20a of the bearing 7 and the lower bearing 20. A lubricating oil chamber 22 is formed,
The upper end surface 21a of the thrust collar member 21 has an opening 24 formed in its radially outer portion for supplying lubricating oil to the bevel gear 23 below. A bank portion 25 that is appropriately raised upward is formed in a circumferential portion passing through the edge portion on the 14 side.

The supply pipe 13 is connected to a radially inner lubricating oil chamber 22 defined by the bank portion 25 at its downstream end.

Next, the effect will be explained.

When the built-in gears 5 and 6 in the front transfer case 2 are driven, the lubricating oil that is scraped up by the built-in gears 5 and carried in the rotational direction is transferred to the next tooth even if it is splashed away in the radial direction during the rotation. Since the lubricating oil can be scraped up again, the lubricating oil collector 10 is continuously supplied and filled with lubricating oil.

When the pressure inside the front transfer case 2 rises during operation, this pressure is also applied to the lubricating oil collection chamber 10, so at this time, the lubricating oil inside the lubricating oil collecting chamber 10 increases as the pressure increases. It is sent to the supply pipe 13. That is, lubricating oil is supplied to the bearing 7 from the supply pipe 13.

Incidentally, since the lubricating oil supplied to the bearing 7 is dammed up at the bank portion 25 and the lubricating oil temporarily stored in the lubricating oil chamber 22 is supplied, the internal pressure of the transfer case is low when the transfer is driven from a stopped state. A desired amount of lubricating oil is supplied to the bearing 7 even at the same time.

Note that the front transfer case 2 is provided with a breather (not shown), and the opening pressure of this breather 47' is
It is natural that the lubricating oil collecting chamber 10 is set to an opening pressure that exceeds the pressure that allows lubricating oil to be sent to the supply pipe 13. It is similar to the construction.

[Effects of the Invention] As is clear from the above explanation, according to the present invention, the following excellent effects can be exhibited.

(1) Rotation spaced apart from the lubricating oil level without imparting kinetic energy that generates heat to the lubricating oil stored in the transfer case! Since the lubricating oil can be supplied to the moving parts and at the pressure inside the transfer case, it is possible to prevent the lubricating oil temperature in the transfer case from rising abnormally.

(2) It is possible to reduce costs.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing a preferred embodiment of the present invention, FIG. 2 is a detailed sectional view of the main part of FIG. 1, and FIG. 3 is a plan view showing a transfer as a conventional example. In the figure, 1 is a transfer case, 5 is a built-in gear, 1o is a lubricating oil collection chamber, and 13 is a supply pipe.

Claims (3)

[Claims] (1) To supply lubricating oil to a built-in gear that is rotatably provided in a sealed transfer case and scoops up the lubricating oil inside the case, and to a rotating sliding part located away from the lubricating oil liquid level. a supply pipe, and a lubricating oil collection chamber that surrounds the tooth surface of the built-in gear along the rotational direction and sends the lubricating oil scooped up by the tooth surface to the supply pipe by the pressure inside the case. A transfer lubrication device featuring: (2) The transfer lubricating device according to claim 1, wherein the built-in gear is a transmission gear for transmitting driving force. (3) The supply pipe is provided to be exposed outside the transfer case, and the upstream end of the supply pipe is connected to the lubricating oil collection chamber, and the downstream end is connected to the transfer case facing the rotating sliding part. A transfer lubricating device according to claim 1, wherein the transfer lubricating device is connected to one another.