JPS6231726Y2 - - Google Patents

Description

[Detailed description of the invention] This invention is a lubricating device for a transfer device with a PTO, more specifically, a PTO device that is interlocked and connected to the input shaft of the transfer device on the side of the transfer case that houses the transfer device. set up this
This invention relates to a lubricating device for a transfer device with a PTO, which extracts power from the transfer device using a PTO device.

In general, for four-wheel drive vehicles,
For example, as disclosed in Japanese Patent Publication No. 39-27719, a transfer device consisting of a gear transmission mechanism for controlling switching between two-wheel and four-wheel drive is provided in a transfer case, and the transfer device is installed on the side of the transfer case. A PTO device is provided to extract power for cargo handling from the device, and the input shaft of the PTO device can be coupled to the input shaft of the transfer device via a clutch, while the output shaft of the PTO can be used for work such as winching. I'm trying to drive the machine.

Therefore, it is necessary to supply lubricating oil to the moving parts of the gear transmission mechanism or PTO device in the transfer case, and for this reason, normally, a part of the gears of the transfer and the PTO device are removed from the transfer case or the PTO device. The lubricating oil is immersed in the lubricating oil stored in the housing, and the lubricating oil is splashed up by driving the gears, etc., to supply oil to each part of the transmission mechanism in the transfer device and the movable parts of the PTO device.

By the way, when the PTO device is driven to perform various operations, the transfer device is switched to neutral in advance, so the gear on the output shaft of the transfer device is stopped, and therefore the gear does not jump up. Although the input shaft of the transfer device rotates and drives the PTO device, the lubricated portion of the input shaft becomes insufficiently lubricated, and if the vehicle is tilted, for example, the input shaft of the transfer device rotates and drives the PTO device. If the above-mentioned operation is performed with the lubricating oil being biased towards the transfer case side, the lubricating oil will no longer be supplied to the PTO device, and in any of the above cases, there is a risk of a seizing accident due to insufficient lubrication.

This invention was devised by paying attention to the special circumstances of transfer equipment with PTO as described above, and the purpose is to install a PTO in the transfer case.
An impeller driven by the device is provided, and when the transfer device is shifted to neutral, the impeller is rotated as the PTO device is driven to rationally lubricate and seize the transfer device or PTO device. The aim is to prevent accidents from occurring.

Therefore, the present invention provides a transfer device that is operatively connected to the input shaft of the transfer device via a clutch to the side of the transfer case that houses the transfer device.
A PTO device is provided, and when the transfer device is shifted to neutral, the connecting operation of the clutch causes the transfer device to shift from the input shaft of the transfer device to the
In a transfer device configured to transmit power to a PTO device and extract power from the PTO device, an impeller is provided in the transfer case and is interlocked and connected to the PTO device and is driven only when power is transmitted to the PTO device. is provided, and when the transfer device is shifted to neutral, the rotation of the impeller accompanying the drive of the PTO device causes the lubricating oil stored in the transfer case to be splashed up, while the transfer case and the PTO device The present invention is characterized in that an oil supply gutter is provided between the PTO housing housing the PTO device and the PTO housing for supplying lubricating oil splashed up by the rotation of the impeller to the PTO device.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The lubricating device for a transfer device with PTO according to the present invention will be explained below with reference to the drawings.

In the figure, 1 is a transfer case, and inside this case 1 is a transfer device 2 that is interlocked and connected to a gear transmission (not shown) in a transmission case provided on one side of the case 1. The rotary power is transmitted to the front and rear wheels via the transfer device 2.

The transfer device 2 includes an input gear 22 integrally fitted and supported on an input shaft 21 extending from the gear transmission, and a small-diameter first driven gear 23 having clutch gears 23a on both sides of the gear 22 in the axial direction.
and a large-diameter second driven gear 24 having a clutch gear 24a are each supported freely, and a sleeve 25 is provided on the outer periphery of the input gear 22 to mesh with the gear 22 and slide in the axial direction. By sliding the sleeve 25 and engaging the clutch gear 23a or 24a, the first or second driven gear 23, 24 is coupled to the input gear 22, and the rotational power of the input shaft 21 is transmitted. By positioning the sleeve 25 at a neutral position on the outer periphery of the input gear 22 without engaging the clutch gears 23a, 24a, the first and second driven gears 23, 24
The respective gears 23, 24 without transmitting power to
is intended to be maintained in a neutral state.

Further, the transfer case 1 is provided with idler gears 27a and 27b that support an idler shaft 26 and mesh with the respective driven gears 23 and 24 on the shaft 26, and one of the idler gears 27a is provided on the rear drive shaft 28. The driven gear 29 is engaged with the driven gear 29, and each driven gear 23, 24 by the sleeve 25 is engaged with the driven gear 29.
By selectively driving the rear drive shaft 28, high and low speed rotational power is transmitted to the rear drive shaft 28.

The transfer case 1 supports a front drive shaft 30 to face the rear drive shaft 28, and both shafts 28, 3
A dog clutch 31 is interposed between 0 and 0, and only the rear drive shaft 28 is driven by the switching operation of the clutch 31, resulting in a two-wheel drive state.
Alternatively, the rear drive shaft 28 and the front drive shaft 30 are driven to create a four-wheel drive state.

A lubricating oil O is loaded into the bottom of the transfer case 1, and a part of the gear constituting the transfer device 2 is immersed in this lubricating oil O, and the lubricating oil O is splashed up by the gear and transferred. equipment 2
We are trying to refuel each part of the engine.

Further, on the side of the transfer device 2,
A PTO device 4 is provided to extract power for cargo handling.

Specifically, as shown in detail in FIG. 2, the PTO of the PTO device 4 is mounted on the side of the transfer case 1.
Attach the housing 41 to the housing 41,
facing the input shaft 21 of the transfer device 2
While supporting the PTO shaft 42 and extending the PTO shaft 42 to the outside of the PTO housing 41, clutch gears 43 and 44 are provided around the opposing ends of the input shaft 21 and the PTO shaft 42, respectively, A sleeve 45 that slides in the axial direction is provided on the clutch gears 43, 44, and the sleeve 45 and the clutch gears 43, 44 constitute a clutch C. Both clutch gears 43, 44, the power is transmitted from the input shaft 21 to the output shaft 42, and the power is taken out from the output shaft 42, and when the sleeve 45 is positioned on one of the clutch gears 44, the The input shaft 21 and the PTO shaft 42 are configured to be disconnected from each other.

However, there is a PTO inside the transfer case 1.
An impeller 5 is provided which is interlocked with the device 4, and by the rotation of the impeller 5, the lubricating oil O stored in the transfer case 1 is splashed up to supply oil to each part of the transfer device 2. An oil supply gutter 6 is provided between the case 1 and the PTO housing 41 for supplying lubricating oil splashed up by the rotation of the impeller 5 to the PTO device 4.

Specifically, an impeller shaft 50 is pivotally supported on the PTO housing 41, and one end of the shaft 50 extends to the inner bottom of the transfer case 1, and the impeller 5 is attached to the tip thereof.

Chain sprockets 51 and 52 are provided at the other end of the impeller shaft 50 and the PTO shaft 42, and a chain 53 is wound between these sprockets 51 and 52, so that the impeller 5 is rotated by the rotation of the PTO shaft 42. We do what we want to do.

On the other hand, an oil supply gutter 6 having a U-shaped cross section is arranged at a predetermined slope from the vicinity of the impeller 5 in the transfer case 1 to the vicinity of the chain sprocket 51 in the PTO housing 41. The oil supply gutter 6 receives the lubricating oil splashed up from the PTO housing 41.
The lubricating oil is supplied to the PTO device 4 through the chain sprockets 51 to 53 and the chain 53 inside.

The present invention is constructed as described above, and when the transfer device 2 in the transfer case 1 is operated, that is, by moving the sleeve 25 in the axial direction, the input gear 22 on the input shaft 21 is moved to the first position. And when it is connected to either of the second driven gears 23, 24 to transmit speed change power to the front and rear wheels, it is immersed in the lubricating oil O in the case 1 in conjunction with the respective gears 23, 24. As the gear rotates, the lubricating oil O is splashed up and supplied to each part of the transfer device 2. In such a state, the impeller 5 does not rotate, which may cause unnecessary power loss. There isn't.

Thus, the clutch gear 43 provided at the shaft end of the input shaft 21 and the clutch gear 44 provided on the PTO shaft 42 inside the PTO housing 41 are connected to the sleeve 45.
When driving the PTO shaft 42 by connecting the transfer device 2 with
This is done with the front and rear wheels stopped without transmitting power to either of the driven gears 23, 24, and therefore, when the PTO shaft 42 is driven, the supply of lubricating oil O by the gears is stopped. However, as the PTO shaft 42 is driven, the impeller 5 rotates via the chain 53, and the lubricating oil O
While the lubricating oil O is jumped up and supplied to the input shaft 21 which is being driven in the transfer device 2, a part of the lubricating oil O jumped up by the impeller 5 is sent to the oil supply gutter 6.
The lubricating oil is also supplied to the PTO device 4 from the chain sprocket 51 in the PTO housing 41 to the chain 53 through the chain 53.

In this way, even though the lubricating oil is not splashed up by the transfer device 2 when the transfer device 2 is switched to neutral, the input of the transfer device 2 is caused by the impeller 5. When the shaft 21 is reliably lubricated, the PTO device 4 is also reliably lubricated.

As described above, the present invention provides an impeller in the transfer case that is interlocked with the PTO device and is driven only when power is transmitted to the PTO device, and when the transfer device is shifted to neutral, the PTO device The rotation of the impeller caused by the drive of the impeller causes the lubricating oil stored in the transfer case to splash up, while the rotation of the impeller causes the lubricating oil to splash up between the transfer case and the PTO housing that houses the PTO device. Since an oil supply gutter is provided to supply the raised lubricating oil to the PTO device, even though the transfer device is set to neutral when the PTO device is activated, the lubricating oil is splashed up from the impeller and transferred. The device can be refueled, and even if the vehicle is tilted and the lubricating oil is biased toward the transfer case, the oil supply gutter can direct some of the lubricating oil splashed up by the impeller to the PTO device. Therefore, it is possible to prevent the input shaft of the transfer device, the PTO device, etc. that are being driven during the operation of the PTO device from seizing accidents; When the transfer device is driven with the impeller stopped, the impeller does not rotate, and therefore no unnecessary power loss is caused by rotating the impeller.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view showing a transfer device to which the present invention is applied, and FIG. 2 is an enlarged longitudinal sectional view of the main parts with different cutout angles. 1... Transfer case, 2... Transfer device, 4... PTO device, 42... PTO housing, 5... Impeller, 6... Oil supply gutter, O... Lubricating oil.

Claims (1)

[Scope of utility model registration request] A PTO device is provided on the side of the transfer case housing the transfer device, and is interlocked and connected to the input shaft of the transfer device via a clutch,
In the transfer device configured such that when the transfer device is shifted to neutral, power is transmitted from the input shaft of the transfer device to the PTO device and power is extracted from the PTO device by the connecting operation of the clutch. An impeller is provided in the transfer case, the impeller being interlocked and connected to the PTO device and driven only when power is transmitted to the PTO device, and the impeller accompanying the drive of the PTO device when the transfer device is shifted to neutral. The rotation of the impeller causes the lubricant oil stored in the transfer case to be splashed up, while the lubricant oil splashed up by the rotation of the impeller is placed between the transfer case and the PTO housing that houses the PTO device. A lubricating device for a transfer device with a PTO, characterized in that an oil supply gutter is provided for supplying oil to the PTO device.