JPH0647175Y2 - Backlash adjustment device for transfer - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] This invention relates to a backlash adjusting device for a transfer, and in particular, can accurately adjust the backlash between an input gear and an output gear of a transfer for distributing a driving force. The present invention relates to a backlash adjusting device capable of simplifying a transfer structure and reducing man-hours.

[Conventional technology]

Recently, in order to improve running performance and safety not only on rough roads and on rough terrain but also on all running conditions such as running on normal roads, the driving force of the internal combustion engine is transmitted to all axles to drive all wheels. A variety of driving-type cars have appeared.
For example, in a so-called four-wheel drive vehicle in which all the front wheels and the rear wheels are driven, the driving force is transmitted as shown in FIG. In the figure, 2 is a transmission, 4 is a front final reduction gear, 6 is a transfer, 8 is a propulsion shaft, and 10 is a rear final reduction gear. The driving force of an internal combustion engine (not shown) is converted into a desired torque / rotational speed by the transmission 2 and taken out. The driving force extracted from the transmission 2 is transmitted to the front drive axles 12 and 12 via the front final reduction gear device 4 to drive a front wheel (not shown).

Further, the driving force extracted from the transmission 2 is distributed by the transfer 6. The driving force distributed by the transfer 6 is transmitted from the propulsion shaft 8 to the rear drive axles 14 and 14 via the rear final reduction gear unit 10 to drive a rear wheel (not shown). Reference numeral 16 is the propulsion shaft 8 and the rear final reduction gear device 10.
Viscous joint (Viscous coupling) interposed between
Is.

As described above, in the so-called four-wheel drive vehicle that drives all the front wheels and the rear wheels, the transfer 6 that distributes the driving force of the internal combustion engine is configured as shown in FIG.
An input shaft 20 and an output shaft 22 are rotatably supported by bearings 24 in a main body 18 of the transfer 6, respectively.
The input shaft 20 is provided with a driven gear 28 that meshes with a front final reduction gear 26 of the front final reduction gear 4 on one end side, and an input gear 30 on the other end side. Output shaft 22
An output gear 32 that meshes with the input gear 30 is attached to one end side, and a connector 34 that connects the propulsion shaft 8 is attached to the other end side outside the main body 18.

As a result, the transfer 6 distributes and inputs the driving force extracted from the transmission 2 to the input shaft 20 by the driven gear 28 that meshes with the front final reduction gear 26 of the front final reduction gear 4 as a driving gear, This driving force is output from the input gear 30 through the output gear 32 to the output shaft 22. The driving force output from the output shaft 22 is transmitted from the propulsion shaft 8 connected by the connector 34 to the rear drive axles 14 and 14 via the rear final reduction gear transmission 10 to drive the rear wheels (not shown).

As structures of such a transfer and a transmission, there are those disclosed in Japanese Utility Model Publication No. 61-2091 and Japanese Utility Model Publication No. 63-2694.

[Problems to be solved by the invention]

By the way, the transfer 6 for distributing the driving force is in a meshed state with an input gear 30 attached to the input shaft 20 and an output gear 32 attached to the output shaft 22 in order to ensure sufficient transmission of the driving force. Some backlash needs to be adjusted accurately. At this time, when the connector 34 attached to the other end side of the output shaft 22 is rotated by using the backlash as a measurement screw, the input shaft 20 causes the input shaft 20 to move to the driven gear 28 and the front final reduction gear.
Since it rotates within the range of backlash with 26, the true backlash between the input gear 30 and the output gear 32 cannot be measured, and as a result, the backlash between the input gear 30 and the output gear 32 can be accurately measured. There is a problem that cannot be adjusted.

Therefore, conventionally, as shown in FIGS. 6 to 8, the backlash adjusting hole boss 38 is provided on the bottom portion 18a of the main body 18 so as to be directed to the shaft portion 36 of the input shaft 20 of the transfer 6, and the backlash adjusting hole boss 38 is provided. The backlash adjusting screw 40 and the backlash adjusting hole sealing screw 42 screwed to the screw 38 are provided. As a result, when adjusting the backlash between the input gear 30 and the output gear 32, the backlash adjusting hole boss 38
The screw 40 for backlash adjustment is screwed onto the shaft, and the screw tip 44 is pressed against the shaft portion 36 of the input shaft 20 so that the input shaft 20
, And the backlash between the input gear 30 and the output gear 32 was adjusted. After adjusting the backlash,
The backlash adjusting screw 40 is removed, and the backlash adjusting hole sealing screw 42 is screwed into the backlash adjusting hole boss 38 for sealing.

However, in the conventional backlash adjusting screw 40, since the screw tip 44 is pressed and abutted against the shaft portion 36 of the input shaft 20, there is a possibility that the rotation of the input shaft 20 cannot be surely prevented when the backlash is adjusted. There is therefore an input gear 30 and an output gear
There was a problem that the backlash with 32 could not be adjusted accurately. In addition, the boss for the backlash adjusting hole is provided on the main body 18 only for adjusting the backlash between the input gear 30 and the output gear 32.
By providing the backlash adjusting hole sealing screw 42 that is screwed to the backlash adjusting hole boss 38, which is formed by removing the backlash adjusting screw 40, the structure is complicated and the number of steps is increased. There was an inconvenience.

[Purpose of device]

Therefore, the purpose of the present invention is to reliably prevent the rotation of the input shaft of the transfer when adjusting the backlash between the input gear and the output gear of the transfer that distributes the driving force, and to accurately adjust the backlash. , The backlash adjustment hole boss provided in the transfer main body and the backlash adjustment hole sealing screw screwed into the backlash adjustment hole boss can be omitted to simplify the structure and reduce the number of steps. It is to realize the adjusting device.

[Means for solving problems]

In order to achieve this object, the present invention aims to direct a driven gear mounted on an input shaft of a transfer for distributing a driving force to a main body of the transfer, and a lubricant oil discharge hole in which a screw for sealing a lubricant oil is screwed. A hole boss is provided to prevent rotation of the input shaft of the transfer when adjusting the backlash between the input gear mounted to the input shaft of the transfer and the output gear mounted to the output shaft of the transfer. It is characterized in that a backlash adjusting screw that is screwed into the oil discharge hole boss is provided.

[Action]

According to the configuration of this invention, the backlash adjusting screw is
The tip of the screw is driven by directing it to the driven gear mounted on the input shaft of the transfer and screwing it onto the boss for the lubricating oil discharge hole that is screwed into the lubricating oil discharge hole sealing screw provided on the transfer body. It can be pressed against the gear.

Also, when adjusting the backlash between the input gear and output gear of the transfer, screw the backlash adjustment screw into the boss for the lubricating oil discharge hole provided in the main body so that it is directed to the driven gear attached to the input shaft. This prevents rotation of the input shaft, so the backlash adjustment hole boss can be omitted, and a backlash adjustment hole sealing screw that is screwed into the backlash adjustment hole boss when the backlash adjustment screw is removed is also included. It can be omitted by substituting the lubricating oil discharge hole sealing screw.

〔Example〕

 Next, an embodiment of the present invention will be described in detail with reference to the drawings.

1 to 5 show an embodiment of the present invention.

As shown in FIG. 9, the transfer 6 for distributing the driving force
Is the drive force extracted from the transmission 2 by the driven gear 28 that meshes with the front final reduction gear 26 of the front final reduction gear 4 as a driving gear, distributed to the input shaft 20, and input. Output from the gear 30 to the output shaft 22 via the output gear 32. The driving force output from the output shaft 22 is transmitted from the propulsion shaft 8 connected by the connector 34 to the rear drive axles 14 and 14 via the rear final reduction gear transmission 10 to drive the rear wheels (not shown).

As shown in FIGS. 1 to 3, the lubricating oil discharge hole sealing screw 46 is attached to the main body 18 of the transfer 6 by directing it toward the driven gear 28 attached to the input shaft 20 of the transfer 6 that distributes the driving force. A boss (48) for lubricating oil discharge hole to be screwed with is provided.
When adjusting the backlash between the input gear 30 attached to the input shaft 20 of the transfer 6 and the output gear 32 attached to the output shaft 22 of the transfer 6, the rotation of the input shaft 20 of the transfer 6 is adjusted. Backlash adjusting screw 50 screwed into the lubricating oil discharge hole boss 48 to prevent it.
To provide.

That is, without providing the backlash adjusting hole boss 38 and the backlash adjusting hole sealing screw 42 into which the conventional backlash adjusting screw 40 is screwed, the main body 18 of the transfer 6 is
As shown in FIG. 3, the main body of the transfer 6 is directed toward the driven gear 28 attached to the input shaft 20 of the transfer 6.
A lubricating oil discharge hole boss 48 into which the lubricating oil discharge hole sealing screw 46 is screwed is provided on the back 18, and a backlash adjusting screw 50 is screwed into the lubricating oil discharge hole boss 48.

As a result, the lubricant oil discharge hole sealing screw 46 and the backlash adjusting screw 50 are screwed together by utilizing the lubricant oil discharge hole boss 48 provided on the bottom portion 18a of the main body 18. The backlash adjusting screw 50 is formed of a flexible material such as resin. Further, the screw tip 52 can be formed of a flexible material such as resin.

According to this configuration, when adjusting the backlash between the input gear 30 and the output gear 32, as shown in FIG.
When the backlash adjustment screw 50 is screwed into the lubricating oil discharge hole boss 48 that is oriented toward the 28, the screw tip 52 is attached to the input shaft.
It can be pressed against the driven gear 28 attached to 20. Therefore, the rotation of the input shaft 20 can be surely prevented, and thereby the backlash between the input gear 30 and the output gear 32 can be accurately adjusted.

In this case, by forming the screw tip 52 of the backlash adjusting screw 50 from a flexible material such as resin, the input shaft 20
The rotation of can be prevented more reliably.

After adjusting the backlash, as shown in FIG. 5, remove the backlash adjusting screw 50 from the lubricating oil discharge hole boss 48 and screw the lubricating oil discharge hole sealing screw 46 into the lubricating oil discharge hole boss 48. And seal.

In this way, the backlash adjusting screw 50 is screwed to the lubricating oil discharge hole boss 48 to which the lubricating oil discharge hole sealing screw 46 provided so as to face the driven gear 28 attached to the input shaft 20 is screwed. Therefore, the conventional backlash adjusting hole boss 38 can be omitted, and the conventional backlash adjusting hole sealing screw 42, which is screwed into the backlash adjusting hole boss 38 without the backlash adjusting screw 40, can be used to seal the lubricating oil discharge hole. It can be omitted because it can be replaced by the set screw 46. As a result, the structure can be simplified and the number of steps can be reduced.

In this embodiment, the transfer is exemplified, but the transmission, the gear device and the like can be implemented.

[Effect of device]

As described above, according to the present invention, the backlash adjusting screw is attached to the input shaft of the transfer, and is directed to the driven gear to be screwed with the lubricating oil discharge hole sealing screw provided in the transfer body. The screw tip can be pressed against the driven gear by being screwed into the oil discharge hole boss. Therefore, the rotation of the input shaft can be reliably prevented, and the backlash between the input gear and the output gear can be accurately adjusted.

Also, when adjusting the backlash between the input gear and output gear of the transfer, screw the backlash adjusting hole sealing screw to the boss for lubricating oil discharge hole provided on the main body so that it is directed to the driven gear attached to the input shaft. Since the rotation of the input shaft can be prevented by mating, the backlash adjustment hole boss can be omitted, and the backlash adjustment hole sealing screw that is screwed into the backlash adjustment hole boss when the backlash adjustment screw is removed Can also be omitted by substituting the lubricating oil discharge hole sealing screw. Therefore, the structure can be simplified and the number of steps can be reduced.

[Brief description of drawings]

1 to 5 show an embodiment of the present invention, and FIG. 1 is a partial sectional view of a lubricating oil discharge hole boss of a transfer body, and FIG.
The figure shows a side view of the backlash adjusting screw, Fig. 3 shows a side view of the lubricating oil discharge hole sealing screw, and Fig. 4 shows the backlash adjusting screw screwed onto the lubricant oil discharge hole boss of the transfer body. FIG. 5 is a partial sectional view showing a state in which a lubricating oil discharge hole sealing screw is screwed into a lubricating oil discharge hole boss of the transfer body. 6 to 8 show a conventional example, FIG. 6 is a partial sectional view of a boss for a backlash adjusting hole of a transfer body, FIG. 7 is a side view of a screw for adjusting the backlash, and FIG. 8 is a backlash adjusting hole seal. It is a side view of a set screw. FIG. 9 is a schematic explanatory diagram of the transfer. FIG. 10 is a schematic explanatory diagram of a power transmission system. In the figure, 2 is a transmission, 4 is a front final reduction gear, 6 is a transfer, 8 is a propulsion shaft, 10 is a rear final reduction gear, 18 is a main body, 20 is an input shaft, 22 is an output shaft, and 26 is a front part. Final reduction gear, 28
Is a driven gear, 30 is an input gear, 32 is an output gear, 36 is a shaft portion,
38 is a boss for backlash adjustment hole, 40 is a screw for backlash adjustment, 42 is a screw for backlash adjustment hole sealing, 44 is a screw tip, 46 is a lubricating oil discharge hole sealing screw, 48 is a lubricating oil discharge hole boss, and 50 is Backlash adjusting screw, 52 is the tip of the screw.

Claims (1)

[Scope of utility model registration request] 1. A boss for a lubricating oil discharge hole, to which a lubricating oil discharge hole sealing screw is screwed, is provided on the body of the transfer, being oriented toward a driven gear attached to an input shaft of the transfer for distributing a driving force, When adjusting the backlash between the input gear attached to the input shaft of the transfer and the output gear attached to the output shaft of the transfer, the lubricating oil discharge hole boss is provided to prevent rotation of the input shaft of the transfer. A backlash adjusting device for a transfer, comprising a backlash adjusting screw to be screwed.