Abstract:
A motor direct driven compressor system includes a motor, a coupling and a compressor, and the coupling is coupled between the motor and the compressor, and a second assembling portion, a coupling portion and a metal plate of the coupling are used for connecting a driving shaft of the motor and a transmission shaft of the compressor. With this design, the driving force of the motor can be transmitted to the compressor and provided for the operation of the compressor. In addition, errors produced by the rotation and transmission during the transmission process can be minimized, so that the compressor can be operated accurately and normally.

Description:
BACKGROUND OF THE INVENTION 
       [0001]    (a) Field of the Invention 
         [0002]    The present invention relates to a motor direct driven compressor system, and more particularly to a technology of driving an air-conditioning compressor of an automobile by an electric motor. 
         [0003]    (b) Description of the Related Art 
         [0004]    Automobile air-conditioning compressor is a key component of an automobile air-conditioning system, whose working environment and conditions are not as good as those of air conditioners in a building or at a home or other fixed air conditioners in the following aspects: 1. The change of thermal load outside the automobile is large, and since the automobile is a moving object, therefore the change of external whether conditions is large; 2. The required air-conditioning load is large, and thus a quick temperature drop is required; 3. The automobile is operated in an environment with vibrations and bumpy roads, and thus the automobile air-conditioning system requires the shock resistance and bumping resistance; 4. The automobile is exposed to direct sunlight most of the time, the thermal load at the driver seat and passenger seats is much larger than a room; 5. There is a large heat loss in the automobile, since it is difficult to insulate heat of an automobile; 6. A high-performance air-conditioner is required for the automobile. 
         [0005]    In addition, most automobile air-conditioning compressors are driven by an engine of the automobile, but hybrid vehicles, electric cars and fuel cell cars are driven by an electric generator. Since the rotation speed of the compressor is affected by the rotation speed of the engine, there is a larger charge of rotation speed, varying from idle speed to maximum speed, and thus the automobile air-conditioning compressor requires the following: 1. Good low-speed performance is required, so that a high cooling performance can be provided for a low-speed operation. 2. Low input power is required for a high speed operation to save gas consumption and improve dynamic power. 3. Small volume and light weight. 4. High reliability is required for operations in poor weather conditions, and thus the compressor must be able to resist high temperature and high pressure, and components must be highly vibration resisting and sealed for a high-speed operation of a car on a bumpy road. 5. The operation of the compressor must be stable, steady, low vibrating and low noise, and thus the use of automobile air-conditioning compressor has much stricter limitations over compressors of other types. 
         [0006]    At present, most automobiles adopt an internal combustion engine and petroleum (or diesel) as power source, and components including a belt, a belt pulley and the like for driving and turning on the air-conditioning compressor. As the issues of energy crisis and environmental protection become increasingly serious, the aforementioned hybrid vehicles, electric cars and fuel cell cars are introduced to the market. Although the hybrid vehicles use both petroleum and electric power as dual power source, and a petroleum engine is used for driving the air-conditioning compressor, and present technologies integrate the technology of the electric cars, yet the air pollution produced by the petroleum engine still has the air pollution issue, and thus hybrid vehicles are just transitional products only, and definitely required further improvements. 
         [0007]    If the technology of home air-conditioning compressors is adopted to substitute the use of automobile air-conditioning compressors, it is very difficult to overcome the aforementioned problems of the strict using environment of the automobile air-conditioning compressor, and obviously the home air-conditioning compressors are not applicable in this case. 
         [0008]    Therefore, it is an important subject for related researches and manufacturers to provide an appropriate way of driving an automobile air-conditioning compressor. 
       SUMMARY OF THE INVENTION 
       [0009]    Therefore, it is a primary objective of the present invention to overcome the aforementioned shortcoming and deficiency of the prior art by providing a motor direct driven compressor system having a motor for driving and operating an automobile compressor uses a motor to overcome the air pollution problem caused by internal combustion engine that uses petroleum and diesel as energy source, so as to achieve the environmental protection requirements. 
         [0010]    To achieve the aforementioned objective, the present invention provides 
         [0011]    Another objective of the present invention is to use a coupling to connect a motor and a compressor, and a second assembling portion, a coupling portion and a metal plate of the coupling are simple components having the easy-to-manufacture, convenient-to-assemble and low cost advantages. 
         [0012]    To achieve the foregoing objective, the present invention comprises: 
         [0013]    a motor, having a driving shaft installed to a side of the motor, a first cut groove formed at the center of an end of the driving shaft, and a first assembling portion disposed at an external circumference of the same side of the driving shaft; 
         [0014]    an automobile air-conditioning compressor, having transmission shaft installed to a side of the automobile air-conditioning compressor and opposite to the driving shaft, and a second cut groove formed at the center of an end of the transmission shaft and opposite to the first cut groove; 
         [0015]    a coupling, including a second assembling portion, a coupling portion and a metal plate, wherein the second assembling portion is disposed between the motor and the compressor and installed with the first assembling portion, and an opening is penetrated through the center of the second assembling portion, and the coupling portion is disposed between the motor and the second assembling portion, and the coupling portion includes a plurality of positioning sections disposed on a side of the coupling portion and with an interval apart from each other, and the plurality of positioning sections surround a penetrating hole at the middle of the coupling portion, and the metal plate is disposed between the motor and the coupling portion, wherein a side of the metal plate is embedded into the first cut groove of the motor driving shaft, and the compressor transmission shaft is passed through the opening of the second assembling portion and the penetrating hole of the coupling portion, and another side of the metal plate is embedded into the second cut groove of the transmission shaft, and ends of the transmission shaft and the driving shaft are coupled at the position of the metal plate, and external circumferences of the driving shaft and the transmission shaft are coupled to internal circumferential surfaces of the plurality of positioning sections. 
         [0016]    The foregoing and other objectives of the present invention will become apparent with the detailed description of the following preferred embodiment and illustration of related drawings. 
         [0017]    Of course, other components or an arrangement of other components of the present invention may vary, but the selected preferred embodiments will be described in details in the specification and illustrated by the drawings. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0018]      FIG. 1  is an exploded view of the present invention; 
           [0019]      FIG. 2  is a perspective view of the present invention; and 
           [0020]      FIG. 3  is a cross-sectional view of a motor and a compressor coupled at the position of a coupling in accordance with the present invention. 
       
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
       [0021]    The technical characteristics of the present invention will become apparent with the detailed description of the preferred embodiments and the illustration of the related drawings as follows. 
         [0022]    With reference to  FIGS. 1 to 3  for a structure in accordance with a preferred embodiment of the present invention, the preferred embodiments are used for illustrating the present invention only, but not intended for limiting the scope of the invention. 
         [0023]    In  FIGS. 1 and 2 , a motor direct driven compressor system in accordance with a preferred embodiment of the present invention comprises: 
         [0024]    a motor  1 , having a driving shaft  11  installed to a side of the motor  1 , a first cut groove  111  formed at the center of an end of the driving shaft  1 , and a tapered first step portion  112  formed around the periphery of an end of the driving shaft  11 , and a first assembling portion  12  formed at the external periphery of the same side of the driving shaft  11  of the motor  1 , wherein the first assembling portion  12  of this preferred embodiment has a protruding portion  121  disposed around the driving shaft  11 , and a plurality of connecting holes  122  formed at an external periphery of the protruding portion  121 , and there are four first connecting holes in this preferred embodiment; 
         [0025]    an automobile air-conditioning compressor  2 , having a transmission shaft  21  installed to a side of the automobile air-conditioning compressor  2  and disposed opposite to the driving shaft  11  of the motor  1  (such as both ends are coupled with each other), a second cut groove  211  formed at the middle of an end of the transmission shaft  21  and opposite to the first cut groove  111 , and a tapered second step portion  212  formed around the periphery of an end of the transmission shaft  21 , and the first and second step portions  112 ,  212  are tapered consistently; 
         [0026]    a coupling  3 , for coupling the motor  1  and the compressor  2 , and including a second assembling portion  31 , a coupling portion  32  and a metal plate  33 , wherein the second assembling portion  31  is disposed between the motor  1  and the compressor  2  and installed to the first assembling portion  12 , and the second assembling portion  31  of this preferred embodiment includes an inwardly concave portion  311  provided for latching and coupling the protruding portion  121  of the first assembling portion  12 , and a plurality of second connecting holes  312  formed at an external periphery of the second assembling portion  31 , and there are four second connecting holes  312 , and the first and second connecting holes  122 ,  312  can be secured by an external locking element (not shown in the figure) for combining the first and second assembling portions  12 ,  31 , and an opening  313  is formed and penetrated through the center of the second assembling portion  31 ; and the coupling portion  32  is disposed between the motor  1  and the second assembling portion  31 , and the coupling portion  32  includes a plurality of positioning sections  321  disposed on a side of the coupling portion  32  and separated with an interval from each other, and the plurality of positioning sections  321  are disposed around the penetrating hole  322  at the center of the coupling portion  32 , wherein the coupling portion  32  of this preferred embodiment is a structure made of plastic and having an appropriate deformation recoverability, and each positioning section  321  is formed by extending outward from the coupling portion  32 , and the metal plate  33  is situated between the motor  1  and the coupling portion  32 , and a side of the metal plate  33  is embedded into the first cut groove  111  of the motor  1  driving shaft  11 , and the metal plate of this preferred embodiment is an iron plate. 
         [0027]    In addition, the transmission shaft  21  of the compressor  2  is passed through the opening  313  of the second assembling portion  31  and the penetrating hole  322  of the coupling portion  32 , and another side of the metal plate  33  is embedded into the second cut groove  211  of the transmission shaft  21 , and ends of the transmission shaft  21  and the driving shaft  11  are coupled at a position of embedding the metal plate  33 , and external peripheries of the driving shaft  11  and the transmission shaft  21  are coupled to the internal circumferential surface  321 A of the plurality of positioning sections  321 ; 
         [0028]    a base  4 , having a first locking portion  41  and a second locking portion  42  disposed on both sides of the base  4  respectively, wherein the first locking portion  41  is coupled and secured to the bottom of the first assembling portion  12 , and the second locking portion  42  is coupled and secured to the bottom of the compressor  2 , wherein the top of the first locking portion  41  of this preferred embodiment has a concavely curved portion  411  for supporting the bottom of the motor  1 , and a third connecting hole  412  is formed separately at position adjacent to both left and right sides of the concavely curved portion  411 , and the two third connecting holes  412  correspond to the two first connecting holes  122  at the bottom of the protruding portion  121  and are locked by a locking element (not shown in the figure); and, the second locking portion  42  has a fourth connecting hole  421  provided for coupling and securing a securing portion  22  at the bottom of the compressor  2 . 
         [0029]    With reference to  FIG. 3  for a preferred embodiment of the present invention, the compressor  2  has a circular connecting portion  23  extended from an external periphery of the transmission shaft  21  and inserted into an opening  313  of the second assembling portion  31 , and an external wall of the connecting portion  23  is abutted and fixed to an internal wall of the opening  313 , and an end of the connecting portion  23  is passed out of the opening  313 , and a position limiting element  231  is provided for fixing an end of the connecting portion  23  to the external periphery of the opening  313 . In addition, a side of the coupling portion  32  without the positioning section  321  is abutted and coupled to a vertical plane  212 A of the second step portion  212  of the transmission shaft  21 , and an internal circumferential surface  321 A of the plurality of positioning sections  321  is abutted and coupled to the first step portion  112  of the driving shaft  11  and an external circumferential surface of the second step portion  212  of the transmission shaft  21 , and an end of the transmission shaft  21  is protruded out from the opening  313  of the second assembling portion  31 . 
         [0030]    Each component of the motor direct driven compressor system of the present invention and its assembling method are the same as described above. With reference to  FIGS. 1 to 3  for the application of the system, the power of the motor  1  is basically supplied by the battery of the automobile or any other method, such that after the motor  1  is started, motive power is transmitted from the driving shaft  11  and the transmission shaft  21  to the compressor  2  to achieve the effect of turning on the compressor  2  to start the air-conditioning. Of course, the second assembling portion  31 , the coupling portion  32  and the metal plate  33  of the coupling  3  are provided for overcome slight errors produced by the rotation and transmission between the driving shaft  11  of the motor  1  and the transmission shaft  21  of the compressor  2 , wherein the metal plate  33  (which is an iron plate in this preferred embodiment) and the coupling portion  32  have an appropriate deformation recoverability, such that when the aforementioned error of the transmission and rotation occurs, a sufficient space is provided to achieve the buffering effect, so as to maintain a smooth transmission between the driving shaft  11  and the transmission shaft  21 , and assure accurate and normal operations of the compressor  2 . 
         [0031]    In summation of the description above, the motor direct driven compressor system of the present invention uses the motor  1  to drive the automobile air-conditioning compressor  2 , so as to provide a method of driving the automobile and a solution of substitute energy, overcome the air pollution issue of traditional internal combustion engine (or engine) using petroleum and diesel as the energy source, and achieve the environmental protection effect. 
         [0032]    The technical measures taken by the present invention include the following: The system of the invention comprises the coupling  3 , having the second assembling portion  31 , the coupling portion  32  and the metal plate  33 , and these components come with the advantages of simple structure, easy-to-manufacture, and convenient-to-assemble, and thus incurring a low cost, and providing a high competitiveness to the automobile industry. The present invention also provides the technology of using the motor to drive and turn on the compressor, so as to overcome the present existing problems. 
         [0033]    In summation of the description above, the present invention improves over the prior art, and complies with the patent application requirements, and thus the invention is duly filed for patent application. 
         [0034]    While the invention has been described by device of specific embodiments, numerous modifications and variations could be made thereto by those generally skilled in the art without departing from the scope and spirit of the invention set forth in the claims.