POWER TRANSMISSION APPARATUS FOR A COMPRESSOR

Abstract

In a power transmission apparatus for a compressor according to the present invention, a package of the compressor is reduced in size by shortening the longitudinal length of a one-way bearing while a predetermined level of transmission torque is sustained by optimizing the locations of the one-way bearing and a ball bearing module. Therefore, the mountability thereof can be improved. Also, the one-way bearing is disposed at an outer side from the ball bearing module in a radial direction so as to increase the number of rollers constituting the one-way bearing. Therefore, the transmission torque can be kept identically to that of the related art although the length of the one-way bearing is shortened.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

The above and other features and advantages of the present invention will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings in which:

FIG. 1 is a cross-sectional view of a power transmission apparatus for a compressor according to the first related art;

FIG. 2 is a cross-sectional view of a one-way clutch according to the second related art;

FIG. 3 is a cross-sectional view of a power transmission apparatus for a compressor according to an embodiment of the present invention; and

FIG. 4 is a cross-sectional perspective view of a power transmission apparatus for a compressor according to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE INVENTION

Hereinafter, a power transmission apparatus for a compressor will be described in more detail with reference to the accompanying drawings.

FIG. 3 is a cross-sectional view of a power transmission apparatus for a compressor according to an embodiment of the present invention, and FIG. 4 is a cross□sectional perspective view of a power transmission apparatus for a compressor according to an embodiment of the present invention.

The power transmission apparatus for a compressor 100 includes a pulley 110 rotating by a driving force transmitted from an engine, a hub 150 for transmitting the rotating force of the pulley to the compressor, a power transmission member 120 disposed between the pulley 100 and the hub 150 for transmitting or cutting off the driving power to the compressor selectively, and a driving shaft connection member 140 for connecting the power transmission member 120 and the driving shaft 160. Since the pulley 110, the hub 150, the power transmission member 120, and the driving shaft connection member 140 are identical to those of power transmission apparatus according to the related art, the detailed descriptions thereof are omitted.

Referring to FIGS. 3 and 4, the driving shaft connection member 140 includes an inner race 144, a one-way bearing 145, a ball bearing module 146, and an outer race 141.

The inner race 144 includes a one-way bearing installing portion 144a disposed at the outside of the inner race to install the one-way bearing 145, and a ball bearing module installing portion 144b disposed at the inside thereof for installing the ball bearing module 146.

Unlike the power transmission apparatus according to the related art, the power transmission apparatus according to the present embodiment can increase in size in a radial direction without the influencing of the pitch center distance (PCD) of the pulley 100 although the locations of the one-way bearing 145 and the ball bearing module 146 change. In addition, the longitudinal length of the one-way bearing 145 can be reduced while the predetermined level of transmission torque is kept, thereby making possible to reduce the package of the compressor.

The outer race 141 is formed to surround the outsides of the one-way bearing 145 and the ball bearing module 146. The outer race 141 having a screwing portion 141a formed at the outer circumference side to be screw□connected to the inner ring 121 of the power transmission member 120.

In order to dispose the one-way bearing 145 at a further outer side from the ball bearing module 146 in a radial direction, the one-way bearing installing portion 144a is disposed at an outer side from the ball bearing module installing portion 144b in a radial direction. In this case, the transmission torque can be identically kept although the length of the one-way bearing is shortened by increasing the number of rollers constituting the one-way bearing 145 compared to the conventional power transmission apparatus.

The power transmission member 120 includes an inner ring 121 having a screwing portion at an inner circumference side thereof, an outer ring 122 having an inserting portion 122a inserted into the pulley 110, and a break member 123 for connecting the inner ring 121 and the outer ring 122 and for disconnecting the inner ring 121 and the outer ring 122 by being broken down if a torque higher than a predetermined threshold is applied to the compressor.

Hereinafter, the connections and the operations of the power transmission apparatus according to an embodiment of the present invention will be described with reference to FIGS. 3 and 4.

At first, the inserting portion 122a of the outer ring 122 is inserted among a plurality of dampers 130 and fixed at the inner front side of the pulley 110. The screwing portion 141a formed at the outside of the outer race 141 of the driving shaft connection member 140 is fixed at the inner circumference side of the inner ring 121.

The one-way bearing 145 is disposed at the outside of the one-way bearing installing portion 144a of the inner race 144, and the ball bearing module 146 is disposed at the outside of the ball bearing module installing portion 144b of the inner race 144.

The driving shaft 160 of the compressor is inserted to and fixed at the inner circumference side of the inner race 144.

The power transmission apparatus for a compressor according to the present embodiment transmits the power as follows. At first, a rotation force is transmitted from an engine to the pulley 110, and the pulley 110 transmits the rotation force to the damper 130. Then, the transmitted rotation force rotates the power transmission member 120 connected to the damper 130, and the rotation force is transmitted to the driving shaft connection member 140 connected to the center of the power transmission member 120. Then, the driving shaft 160 connected to the inner race 144 of the driving shaft connection member 140 rotates, thereby driving the compressor.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention as defined by the following claims.

Claims

1. A power transmission apparatus for a compressor comprising: a pulley rotating by a driving force transmitted from an engine;a hub connected to a driving shaft of the compressor which is driven by the engine or a motor and transmitting the rotation force of the pulley to the compressor;a power transmission member disposed between the pulley and the hub for transmitting or cutting off the driving power to the compressor selectively; anda driving shaft connection member for connecting the power transmission member and the driving shaft,wherein the driving shaft connection member includes: an inner race having a one-way bearing installing portion for disposing a one-way bearing at an outer side thereof and a ball bearing module installing portion for disposing a ball bearing module at an inner side thereof; andan outer race formed to surround outsides of the one-way bearing and the ball bearing module, andwherein the one-way bearing is positioned at an outer side from the ball bearing module installing portion in a radial direction of the driving shaft.

2. The power transmission apparatus for a compressor of claim 1, wherein the power transmission member includes an inner ring having a screwing portion formed at an inner circumference side, an outer ring having an inserting portion inserted into the pulley, and a break member for connecting the inner ring and the outer ring and for disconnecting the inner ring and the outer ring by being broken□down when a torque higher than a predetermined threshold is applied to the compressor.

3. The power transmission apparatus for a compressor of claim 2, wherein the outer race includes a screwing portion formed at an outer circumference side, which is screw-connected to the inner ring of the power transmission member.

4. The power transmission apparatus for a compressor of claim 3, wherein the screwing portion is formed at an outer circumference side of the outer race corresponding to the ball bearing module installing portion.