Patent Publication Number: US-2011067510-A1

Title: Eccentric vibrating amplitude device of a vibrator

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     The present application claims priority under 35 U.S.C.. 119 of Taiwanese Application No. 098222567 filed Dec. 2, 2009, the disclosure of which is expressly incorporated by reference herein in its entirety. 
     FIELD OF THE INVENTION 
     The present invention relates to a vibrating amplitude vibrator device. In particular, the present invention relates to an eccentric unit mounted on extended shafts at both ends of a motor which rotate at least one balance block and eccentric blocks in a positive or negative direction so as to generate various torque results due to interaction of the variable angles between them. 
     BACKGROUND OF THE INVENTION 
     Conventional vibrators controlled by PCB of a DC motor come with a single amplitude which generates a single torque as a vibrator. It is impossible to provide different torques in various intensities to a customer&#39;s demand with a flexible selection of satisfactory functions. Besides, in order to provide a customer&#39;s requirement of different intensities of amplitude by replacing an eccentric board loaded on both ends of motor is extremely inconvenient to the customer. 
     SUMMARY OF THE INVENTION 
     The preferred embodiment the present invention pertains to a motor that can rotate in a positive or a negative direction to drive eccentric blocks and at least one balance block. This rotation interchangeably changes the angles and results in different torques. Thus the present invention provides a selectable, variable vibrating amplitude in the intensity of the vibrator. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a partially exploded perspective view that depicts that part of the structure of an eccentric vibrating amplitude vibrator device of a vibrator of a first example that is a first embodiment of the invention. 
         FIG. 2  is a front perspective view of the device depicted in  FIG. 1  in an assembled condition. 
         FIG. 3  is a partially exploded perspective view that depicts that part of the structure of an eccentric vibrating amplitude vibrator device of a vibrator of a second example that is a second embodiment of the present invention. 
         FIG. 4  is a front perspective view of the device depicted in  FIG. 3  shown in an assembled condition. 
         FIG. 5  is a partially exploded perspective view that depicts that part of the structure of an eccentric vibrating amplitude vibrator device of a vibrator of a third example that is a third embodiment of the present invention. 
         FIG. 6  is a front perspective view of the device shown in  FIG. 5  in an assembled condition. 
         FIG. 7  is a partially exploded perspective view that depicts that part of the structure of an eccentric vibrating amplitude vibrator device of a vibrator of a fourth example that is a fourth embodiment of the present invention. 
         FIG. 8  is a front perspective view of the device shown in  FIG. 7  in an assembled condition. 
         FIG. 9  is a partially exploded perspective view that depicts that part of the structure of an eccentric vibrating amplitude vibrator device of a vibrator of a fifth example that is a fifth embodiment of the present invention. 
         FIG. 10  is a front perspective view of the device shown in  FIG. 9  in an assembled condition. 
     
    
    
     DESCRIPTION OF THE PREFERRED EMBODIMENT 
     As a result of research, the inventor developed a device for generating an eccentric vibrating amplitude for a vibrator that is primarily comprised of an eccentric unit on one or both ends of an extended motor shaft. The eccentric unit includes a balance block mounted at the most inner location on the shaft and an eccentric block mounted at the most outer location of the shaft. The eccentric block is mounted on the shaft by a washer and a screw; and the shaft penetrates through eccentrically located round holes on balance block and eccentric block. 
     A purpose of the invention is to generate various torques and produce the vibration effects therefrom. Another purpose is to provide a selection of vibrating amplitudes of the vibrator having different intensities from a switching motor by changing the angles between at least one balance block and a plurality of eccentric blocks, the motor being capable of being switched in a positive or a negative direction, that is, in a clockwise and counter clockwise direction. 
     The present invention provides a customer flexible choice in the vibrating amplitude when in use, for example in the application of fitness equipment or other machines, so as to satisfy a customer&#39;s demand. 
     Specific Examples Or Embodiments 
     In order to reveal the complete technological skill of the invention, reference is made to the attached drawings, depicting the preferred embodiments of the present invention as follows. 
     First, reference is made to the embodiment of the invention depicted in  FIGS. 1 &amp; 2 , which is a first example. The invention is a device to generate eccentric vibrating amplitude of vibrator, which is primarily comprised of an eccentric unit on an extended shaft  1  of a motor at both ends (only one of which is depicted in  FIG. 1 , the other end being substantially the same. A balance block  21  is mounted on shaft  1 . A reverse, single-direction bearing  26  is mounted on shaft  1  between it and balance block  21 . 
     A plurality of eccentric blocks  22  (two in the embodiment of  FIG. 1 ) that are substantially the same are mounted at an outward or external location on of shaft  1 . Eccentric blocks  22  are mounted on shaft  1  with a washer  28  and a screw  27 . In this embodiment of  FIG. 1 , the several eccentric blocks are connected together, such as by being welded to one another. 
     A positive single-direction bearing  26  is located on shaft  1  in between several eccentric blocks  22  and balance block  21 . Behind bearing  26  and in front of balance block  21 , mounted on shaft  1  is a washers  25 . 
     Balance block  21  and several eccentric blocks  22  have a special fan-shape and each has a bearing hole  23  and  24 , respectively. When motor shaft  1  rotates in clockwise, it drives eccentric block  22  with balance block  21  unmoved to generate larger torque. When motor shaft  1  rotates in counter clockwise, it drives balance block  21  with eccentric block  22  unmoved to generate smaller torque. 
     Please refer to  FIGS. 3 and 4 , concerning a second embodiment of the invention of eccentric vibrating amplitude of vibrator on the eccentric unit on the extended shaft  1  of the motor at both ends (only one end of which is shown, but the other end is substantially the same. 
     There are washers  25  and balance block  31  mounted on shaft  1  at the most inner location of the eccentric unit. Balance block  31  has a fan-shape with a round hole  33  that receives a socket  37 , also mounted on shaft  1 , in it at the center  1 . 
     Several eccentric blocks  32  are placed and mounted at the outer external location of shaft  1  by washer  28  and bolt  27 . Eccentric blocks are connected together, such as by being welded to one another. 
     There are washers  25  mounted on shaft  1  and located between balance block  31  and eccentric blocks  32 . Eccentric blocks  32  have a fan-shape with one round hold  33  at the center which receives shaft  1 . A screw  35  and a nut  38  are mounted in a side screw hole  34  of eccentric blocks  32 . The head of screw  35  is coated with a rubbery compound, including rubber, and a rubber ring  36  is mounted on screw  35 . 
     When the motor rotates in a clockwise or a counter clockwise rotation, motor shaft  1  drives balance block  31  and several eccentric block  32 , which changes the angle between them so as to vary the loading weight and generate a different torque effect. 
     Please refer to  FIGS. 5 and 6 , concerning a third example and embodiment of the invention of eccentric vibrating amplitude of vibrator on the eccentric unit on the extended shaft  1  of the motor at both ends (only one end of which is shown, but the other end is substantially the same). 
     The eccentric unit also includes a balance  61  mounted on shaft  1  at the most inner location. Balance  61  has a fan-shape with a large round hole  63  at the center and also has an arc groove  64 . 
     An eccentric block  62  is located at the outer most location on shaft  1  and is mounted thereon by washer  28  and screw bolt  27 . Eccentric block  62  has an annular cylindrical-shape with a single round hole  33 . A screw  35  extends radially outwardly from a screw hole in the side of eccentric block  62 . The head of screw  35  is coated with a rubber-like material, which could include rubber, and has a rubber ring  36  mounted on screw  35 . Eccentric block  62  is inserted into large round hold  63  in balance block  61 . Screw  35  is fastened through arc groove  64  of balance block  61  into the screw hole of eccentric block  62 . 
     When the motor rotates in a clockwise or a counter clockwise direction, motor shaft  1  drives balance block  61  and eccentric block  62  from the same side or a different side, respectively, to vary interchangeably both the weight and a different torque effect that is generated. 
     Please refer to  FIGS. 7 and 8 , concerning a fourth example and embodiment of the invention of eccentric vibrating amplitude of vibrator on the eccentric unit on the extended shaft  1  of the motor at both ends (only one end of which is shown, but the other end is substantially the same). 
     The eccentric unit includes a washer  25  and a balance block  41  mounted on shaft  1  at the inner most location on shaft  1 . Balance block  41  has a fan-shape with a round hole  33  along the inner edge of balance block  41  through which shaft  1  extends. Round hole  33  receives a socket  37 . Balance block  41  also has a screw hole  34  located on an upper arm thereof which receives a screw  35 . A nut  38  secures screw  35  in screw hole  34  for mounting screw  35 . The head of screw  35  has a rubber-like coating, which can include rubber, and screw  35  has an outer annular ring  36  mounted on the shaft thereof. 
     Several eccentric blocks  42  are located and mounted at the outer most location on shaft  1 . Blocks  42  are connected together, such as by being welded to one another. Eccentric blocks  42  have a fan shape and a round hole  33  at a lower portion thereof for receiving shaft  1 . Eccentric blocks  42  also have an arcuate slot or groove  43  therethrough at the edge portion thereof that is opposite hole  33 . Also, a washer  25  is located between the outer most side of balance block  41  and the inner most side of eccentric block  42 . 
     When the motor rotates in a clockwise or a counter clockwise direction, motor shaft  1  drives or rotates balance block  41  and the several eccentric blocks  42 . The screw head of screw  35  in balance block  41  extends through the arcuate slot or groove  43  of eccentric block  42 . Thus the rotational angle between balance block  41  and eccentric blocks  42  is changed, resulting in a variable change of both the weight and the torque effect, thereby generating different torques. 
     Please refer to  FIGS. 9 and 10 , concerning a fifth example and embodiment of the invention of eccentric vibrating amplitude of vibrator on the eccentric unit on the extended shaft  1  of the motor at both ends (only one end of which is shown, but the other end is substantially the same). 
     The eccentric unit includes a washer  25  and a balance block  51  mounted on shaft  1  at the inner most location on shaft  1 . Balance block  51  has a fan-shape with a round hole  33  along the inner edge of balance block  41  through which shaft  1  extends. Round hole  33  receives a socket  37 . The side of balance block  51  has an arcuate slot or groove  53  located along the lower edge portion of balance block  5  and generally aligned with the bottom arcuate edge of balance block  51 . 
     Several eccentric blocks  52  are located and mounted at the outer most location on shaft  1  by washer  28  and screw bolt  27  that is received in a threaded bore (not shown) in the end of shaft  1 . Blocks  52  are connected together, such as by being welded to one another. Eccentric blocks  42  have a fan shape or a circle segment shape and have a screw hole  34  at a lower portion thereof for receiving a bolt  35  and a mounting nut  38 . The head of screw  35  has a rubber-like coating, which can be of rubber. Screw  35  also has an encircling rubber ring  36 . Also, a washer  25  is located between the outer most side of balance block  51  and the inner most side of eccentric block  52 . 
     When the motor rotates in a clockwise or a counter clockwise direction, motor shaft  1  drives or rotates balance block  51  and the several eccentric blocks  52 . The screw head of screw  35  in balance block  41  then extends through the arcuate slot or groove  43  of eccentric block  42 . Thus the rotational angle between balance block  41  and eccentric blocks  42  is changed, resulting in a variable change of both the weight and the torque effect, thereby generating different torques. 
     Therefore, the motor of the eccentric vibrating amplitude of vibrator is a positive/negative rotating motor which changes the angles between balance block  51  and eccentric blocks  52  by rotating in positive or negative direction and generating different torques, and hence provides the function of selecting the intensity the vibrating amplitude of the vibrator. 
     While this invention has been particularly shown and described with reference to preferred embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.