JPS627892Y2 - - 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.

However, it is necessary to supply lubricating oil to the gear transmission mechanism in the transfer case, and for this reason, the gears on the output shaft of the transfer are usually immersed in the lubricating oil stored in the case. The rotation of the gear causes lubricating oil to be splashed up and supplied to each part of the transmission mechanism.

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 there is no possibility that the gear will jump up. Even though lubrication cannot be expected, the input shaft of the transfer device continues to rotate and drive the PTO device, so it is possible that the lubricated portion of the input shaft may become insufficiently lubricated and seize. be.

This invention was devised by focusing on the special circumstances of transfer equipment with PTO as described above, and the purpose is to
An impeller driven by a PTO 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 the transfer device and prevent seizure accidents. We are trying to prevent it from happening.

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 connected to the PTO device and driven only when power is transmitted to the PTO device, and when the transfer device is shifted to neutral, the PTO
It is characterized in that lubricating oil stored in the transfer case is splashed up by the rotation of the impeller as the device is driven.

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

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 by switching the clutch 31, only the rear drive shaft 28 is driven to achieve a two-wheel drive state, or the rear drive shaft 28 and the front drive shaft 30 are driven. , it is intended to be in four-wheel drive mode.

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 FIGS. 2 and 3, the PTO housing 41 of the PTO device 4 is attached to the side of the transfer case 1, and the input shaft 21 of the transfer device 2 is opposed to the housing 41. Transmission shaft 42, intermediate shaft 43 and output shaft 44
and the respective shafts 42, 43, 44
gears 45, 46, 47 that mesh with each other are provided, and power is transmitted from the transmission shaft 42 to the output shaft 44 via these gears 45, 46, 47, while the input shaft 21 and the transmission shaft 42 Clutch gears 48 and 49 are provided at opposite ends thereof, and a sleeve 50 is provided on one of the clutch gears 49 to mesh with the gear 49 and slide in the axial direction,
The clutch gears 48, 49 and the sleeve 50
constitute a clutch C, and by sliding the sleeve 50 constituting the clutch C and coupling the clutch gears 48 and 49, power is transmitted from the input shaft 21 to the output shaft 44 via the transmission shaft 42. When the sleeve 50 is placed on the clutch gear 49, the coupling between the input shaft 21 and the transmission shaft 42 is released.

Therefore, the present invention provides a transfer device with PTO as described above, in which an impeller 6 is provided in the transfer case 1 and is interlocked and connected to the PTO device 4.
The rotation of the impeller 6 causes the lubricating oil O stored in the transfer case 1 to be splashed up to supply oil to each part of the transfer device 2.

Specifically, for example, in the case shown in FIGS. 2 and 3, an impeller shaft 61 is supported by the PTO housing 41, and the shaft 61 is extended to the inner bottom of the transfer case 1. The impeller 6 is attached to the tip, and the other end of the shaft 61 is provided with an interlocking gear 62 that meshes with the gear 46 on the intermediate shaft 43, and the rotation of the gear 62 causes the impeller 6 to move through the impeller shaft 61. This is done to make it rotate.

Further, as shown in FIGS. 4 and 5, chain sprockets 51 and 52 are provided on the transmission shaft 42 and the output shaft 44, respectively.
A chain 53 is hung between 1 and 52 to connect the transmission shaft 4.
2 to the output shaft 44, an interlocking chain sprocket 63 is provided on the impeller shaft 61, and the chain 53 is wound around the sprocket 63 to rotate the impeller shaft 61. Do what you can.

In this case, in the embodiments shown in FIGS. 4 and 5, the chain 53 is wound around the outer periphery of the interlocking chain sprocket 63, but the chain 53 is designed to be wound around the inner periphery of the sprocket 63. You may.

Furthermore, the present invention can also be applied to a device in which the transmission shaft 42 is extended outside the PTO housing 41 so that the transmission shaft 42 is also used as an output shaft 44, as shown in FIG. In this case, interlocking chain sprockets 64 and 65 are provided on the transmission shaft 42 and the impeller shaft 61, and each sprocket 6
A chain 66 is placed between the transmission shaft 42 and the impeller shaft 65 to rotate the impeller shaft 61. At this time, it is also possible to perform gear transmission between the transmission shaft 42 and the impeller shaft 61.

The present invention is constructed as described above, and when the transfer device 2 in the transfer case 1 is operating, 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 6 does not rotate, so no unnecessary power loss is caused. be.

Thus, the clutch gear 48 provided at the shaft end of the input shaft 21 and the clutch gear 49 provided on the transmission shaft 42 within the PTO housing 41 are connected to the sleeve 50.
When the output shaft 44 is to be driven by coupling 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 output shaft 44 is driven, the supply of lubricating oil O by the gears is stopped. However, in this case, an impeller shaft 61 is interposed in the power transmission path between the transmission shaft 42 and the output shaft 44, and the impeller 6 provided on the shaft 61 is rotated within the transfer case 1. The lubricating oil O is splashed up by the wheel 6 and is supplied to the input shaft 21 which is being driven in the transfer device 2.

In this way, even though the transfer device 2 is not splashing up the lubricating oil as the transfer device 2 is switched to neutral, the input of the transfer device 2 is caused by the impeller 6. This ensures that the shaft 21 is 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 transmitting power 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, so even though the transfer device is set to neutral when the PTO device is activated, the impeller does not lubricate the oil. The oil can be splashed up to refuel the transfer device.
Therefore, it is possible to prevent a seizure accident of the input shaft of the transfer device that is being driven when the PTO device is in operation, and moreover, even when the PTO device is stopped and the transfer device is being driven. In this case, the impeller does not rotate and therefore does not cause unnecessary power loss.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional view showing a transfer device to which the present invention is applied, Fig. 2 is an enlarged longitudinal sectional view with different notch angles, Fig. 3 is a side sectional view thereof, and Figs. 4 to 6 are other views. FIG. 1...Transfer case, 2...Transfer device, 4...PTO device, 21...Input shaft, 6
... Impeller, 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, so that when the transfer device is shifted to neutral, the PTO device is connected to the input shaft of the transfer device. A transfer device configured to transmit power from the input shaft of the transfer device to the PTO device and extract power from the PTO device in a connecting operation, interlockingly connected to the PTO device within the transfer case; Applicable
An impeller is provided that is driven only when power is transmitted to the PTO device, and when the transfer device is shifted to neutral, the rotation of the impeller as the PTO device is driven splashes the lubricating oil stored in the transfer case. A lubricating device for a transfer device with a PTO, which is characterized by the following features: