CN216519529U - Direct-connected power takeoff - Google Patents

Abstract

The utility model discloses a direct-connected power takeoff, which comprises a shell, wherein a driving shaft is arranged in the shell, the driving shaft is connected with a driving gear through a needle bearing, a gear output shaft is also arranged in the shell, and a spline hole is arranged in the rear end of the gear output shaft; the driving gear is further provided with a radial oil hole, and the radial oil hole is over against the needle bearing. According to the direct-connected power takeoff, the rear end of the gear output shaft is provided with the spline hole, and the rear end of the gear output shaft can be directly connected with the power input shaft of an external working device through the spline hole, so that the problem of transmission connection with the external working device is solved; and the radial oil hole which is just opposite to the needle bearing is arranged on the driving gear, so that the lubricating oil stirred up in the gear rotating process can flow into the needle bearing through the radial oil hole, the lubricating oil continuously flows through the needle bearing, the flowing lubricating oil can play a good lubricating and cooling effect on the needle bearing, and the service life of the needle bearing can be prolonged.

Description

Direct-connected power takeoff

Technical Field

The utility model relates to the technical field of transmission equipment, in particular to a power takeoff.

Background

The power takeoff is also called a power output device and is used for being connected with a low-gear of the gearbox or an output gear shaft of the auxiliary box and outputting power to an external working device, such as a lifting pump and the like.

The power takeoff shell is internally provided with a driving shaft, the driving shaft is connected with a driving gear through a needle bearing, and the driving gear transmits power to a gear output shaft in the power takeoff shell. The gear output shaft is usually connected with an external working device by a flange, but the power input shaft of some working devices is not provided with a flange connecting structure, and how to realize the connection of a power takeoff and the power input shaft of the working devices is a technical problem.

After the power takeoff is connected with the gearbox, lubricating oil in the gearbox flows into the power takeoff to lubricate and cool gears, bearings and the like in the power takeoff. However, since the needle bearing is located in the drive gear, the lubricating oil cannot flow continuously in the needle bearing, so that it cannot be cooled well. Meanwhile, how to avoid the leakage of lubricating oil in the shell of the power takeoff is also a technical problem.

SUMMERY OF THE UTILITY MODEL

In view of the above, the present invention provides a direct connection type power takeoff to solve the technical problem of connecting a gear output shaft of the power takeoff with an external working device, and to solve the technical problems of lubricating and cooling a needle bearing in the power takeoff and preventing lubricating oil in the power takeoff from leaking.

The utility model relates to a direct-connected power takeoff, which comprises a shell consisting of a front shell and a rear shell, wherein a driving shaft is arranged in the shell, the rear end of the driving shaft is arranged on the rear shell through a first rolling bearing, the driving shaft is connected with a driving gear through a needle roller bearing, a gear output shaft is also arranged in the shell, the front end of the gear output shaft is arranged on the front shell through a second rolling bearing, and the rear end of the gear output shaft is arranged on the rear shell through a third rolling bearing;

a spline hole is formed in the rear end of the gear output shaft; the rear shell is also provided with an end cover, the end surface of the outer ring of the first rolling bearing is provided with a sealing gasket matched with the end cover, the end cover is also provided with an oil seal matched with the gear output shaft, the end cover is also provided with a transition section surrounding the gear output shaft, and the end part of the transition section is provided with a flange;

the driving gear is further provided with a radial oil hole, and the radial oil hole is opposite to the needle roller bearing.

Further, an air pressure balance hole is formed in the transition section and is located on the outer side of the oil seal.

The utility model has the beneficial effects that:

1. the rear end of the gear output shaft of the direct-connected power takeoff is provided with a spline hole, and the direct-connected power takeoff can be directly connected with a power input shaft of an external working device through the spline hole, so that the problem of transmission connection with the external working device is solved.

2. According to the direct-connected power takeoff, the radial oil hole which is opposite to the needle roller bearing is further formed in the driving gear, so that lubricating oil stirred up in the rotation process of the gear can flow into the needle roller bearing through the radial oil hole, the lubricating oil continuously flows through the needle roller bearing, the flowing lubricating oil can have good lubricating and cooling effects on the needle roller bearing, and the service life of the direct-connected power takeoff can be prolonged.

3. The direct-connected power takeoff not only solves the sealing problem of the first rolling bearing part and the third rolling bearing part on the rear shell through the gasket and the oil seal, but also avoids the technical problem of lubricating oil leakage of the oil seal part caused by overhigh air pressure outside the oil seal through arranging the air pressure balance hole on the end cover transition section.

Drawings

FIG. 1 is a perspective view of a direct-coupled power take-off;

fig. 2 is a schematic sectional view of the direct-coupled power takeoff.

Detailed Description

The utility model is further described below with reference to the figures and examples.

As shown in the figure, this embodiment direct-connected power takeoff includes the shell of compriseing preceding shell 1 and backshell 2, be provided with driving shaft 3 in the shell, the rear end of driving shaft sets up on the backshell through first antifriction bearing 4, is connected with driving gear 6 through bearing 5 on the driving shaft, still is provided with gear output shaft 7 in the shell, and gear output shaft's front end passes through second antifriction bearing 8 and sets up on the preceding shell, and gear output shaft's rear end passes through third antifriction bearing 9 and sets up on the backshell. The first rolling bearing in the present embodiment is a cylindrical roller bearing, and the second rolling bearing and the third rolling bearing are tapered roller bearings.

A spline hole 10 is formed in the rear end of the gear output shaft; the rear shell is further provided with an end cover 11, a sealing gasket 12 matched with the end cover is arranged on the end face of the outer ring of the first rolling bearing, an oil seal 13 matched with the gear output shaft is further arranged on the end cover, a transition section 14 surrounding the gear output shaft is further arranged on the end cover, and a flange 15 is formed at the end part of the transition section. The flange 15 is used for sealing connection with the housing of an external working device. This direct-connected power takeoff sets up the splined hole through the rear end at gear output shaft, can directly be connected with outside equipment's power input shaft through the splined hole, and the equipment connection is convenient.

The driving gear is further provided with a radial oil hole 16, and the radial oil hole is opposite to the needle roller bearing. This direct-connected power takeoff is through setting up the radial oilhole just to with bearing on the driving gear for the lubricating oil that the gear rotation in-process was stirred up can flow into bearing through radial oilhole, thereby it has lubricating oil to flow through to make in the bearing continuously, and the lubricating oil that flows can play good lubrication and cooling effect to bearing, can prolong its life.

As a modification of the above embodiment, the transition section is provided with an air pressure balance hole 17, and the air pressure balance hole is located outside the oil seal. This direct-connected power takeoff in improvement, it has not only solved the sealed problem of first rolling bearing portion and third rolling bearing portion on the backshell through gasket and oil blanket, through set up the atmospheric pressure balancing hole on the end cover changeover portion, has avoided the too high technical problem that leads to oil blanket portion lubricating oil to leak of oil blanket outside atmospheric pressure moreover.

Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.

Claims (2)

1. The utility model provides a direct-connected power takeoff, includes the shell of compriseing preceding shell and backshell, be provided with the driving shaft in the shell, the rear end of driving shaft sets up on the backshell through first antifriction bearing, is connected with the driving gear through bearing on the driving shaft, still is provided with gear output shaft in the shell, and gear output shaft's front end passes through second antifriction bearing and sets up on the preceding shell, and gear output shaft's rear end passes through third antifriction bearing and sets up on the backshell, its characterized in that:

a spline hole is formed in the rear end of the gear output shaft; the rear shell is also provided with an end cover, the end surface of the outer ring of the first rolling bearing is provided with a sealing gasket matched with the end cover, the end cover is also provided with an oil seal matched with the gear output shaft, the end cover is also provided with a transition section surrounding the gear output shaft, and the end part of the transition section is provided with a flange;

the driving gear is further provided with a radial oil hole, and the radial oil hole is opposite to the needle roller bearing.

2. The direct connection power take-off of claim 1, wherein: and an air pressure balance hole is formed in the transition section and is positioned on the outer side of the oil seal.

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