Abstract:
A pressurizing pump structure includes a cover, a flow guide, a pump and a main axle. The flow guide is interposed between the cover and the pump. The main axle is mounted inside the pump. The pump has several pressurizing chambers, each of which has one or more pressurizing tanks. Each of the pressurizing tanks has a piston. The main axle has an eccentric part going into the pump for driving the pistons in the pressurizing tanks to make reciprocal motions as the main axle rotates, thereby outputting fluid with a higher pressure.

Description:
BACKGROUND OF THE INVENTION 
       [0001]    1. Field of Invention 
         [0002]    The invention relates to a pump structure and, in particular, to a pressurizing pump structure that has a better structural strength and satisfies the high-pressure output demand. 
         [0003]    2. Related Art 
         [0004]    A conventional pressurizing pump structure is shown in  FIG. 9 . It mainly consists of a driving part  91  and a pump cover  92 . The top of the driving part  91  is protruded with several equally spaced driving rods  93 . The top of each of the driving rods  93  is locked with a top chip  94 . The bottom of the driving part  91  is provided with a bearing  95  connected with a driving head  96 . The bottom of the driving head  96  is further connected with the output axle of a motor  97 . The driving head  96  and the output axle of the motor  97  are disposed eccentrically. When the motor  97  rotates the driving head  96 , the driving head  96  sequentially drives the top chips  94  on the driving rods  93  to perform a reciprocal motion by moving up and downs, thereby pressuring water in the pump cover  92 . 
         [0005]    In practice, the spacer  98  between each driving rod  93  and the top chip  94  is likely to be damaged due to the pulling of the driving rod  93  and the top chip  94 . This results in leakage and worse pressuring effects. Moreover, the pressuring efficiency provided by the pressurizing pump is not high enough for high-pressure output. 
       SUMMARY OF THE INVENTION 
       [0006]    An objective of the invention is to provide a pressurizing pump structure with a better structural strength against damages and to achieve high-pressure output requirements. 
         [0007]    To achieve the above-mentioned objective, the disclosed structure includes a cover, a flow guide, a pump, and a main axle. 
         [0008]    The cover has an inlet and an outlet. The flow guide is interposed between the cover and the pump. The flow guide has a first passage connected to the inlet and a second passage connected to the outlet. 
         [0009]    The pump has several pressurizing chambers, each of which has an incoming compartment, an outgoing compartment, and a plurality of pressurizing tanks. Each of the pressurizing tanks has a piston. The incoming compartment and the outgoing compartment are in fluid communications with the pressurizing tank. The incoming compartment is further connected with the first passage, and the outgoing compartment to the second passage. A first check valve is provided between the incoming compartment and the first passage for the fluid to flow in one way. A second check valve is provided between the outgoing compartment and the second passage for the fluid to flow in one way. 
         [0010]    The main axle goes through the inside of the pump. An eccentric part is formed off the center of the main axle. The eccentric part is mounted with a bearing, which is further mounted with a transmission element. The transmission element is pivotally connected with several connecting shafts, each of which is pivotally connected to the piston in the corresponding pressurizing chamber. As the main axle rotates, the transmission elements are driven to swing eccentrically. Such a motion further drives the connecting shafts pivotally installed on the transmission elements to make the pistons inside the pressurizing tanks to perform a reciprocal motion, thereby increasing the pressure of the output fluid. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0011]    These and other features, aspects and advantages of the invention will become apparent by reference to the following description and accompanying drawings which are given by way of illustration only, and thus are not limitative of the invention, and wherein: 
           [0012]      FIG. 1  is an exploded view of the invention; 
           [0013]      FIG. 2  is a schematic view of the disclosed flow guide; 
           [0014]      FIG. 3  is a perspective of the invention; 
           [0015]      FIG. 4  is a cross-sectional view of the invention; 
           [0016]      FIG. 5  shows the invention in use, illustrating the flow as the fluid enters the incoming compartment; 
           [0017]      FIG. 6  shows the invention in use, illustrating the state when the piston performs a reciprocal motion and the fluid enters the pressurizing tank; 
           [0018]      FIG. 7  shows the invention in use, illustrating the state when the piston performs a reciprocal motion to push the fluid in the pressurizing tank to enter the outgoing compartment; 
           [0019]      FIG. 8  shows the invention in use, illustrating the flow as the pressurized fluid goes from the outgoing compartment to outside; and 
           [0020]      FIG. 9  is a structural view of a conventional pressurizing pump. 
       
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
       [0021]    The present invention will be apparent from the following detailed description, which proceeds with reference to the accompanying drawings, wherein the same references relate to the same elements. 
         [0022]    Please refer to  FIGS. 1 to 4 . The disclosed structure of a pressurizing pump consists mainly of a cover  11 , a flow guide  21 , a pump  31 , and a main axle  41 . 
         [0023]    The cover  11  has an inlet  12  and an outlet  13 . The flow guide  21  is interposed between the cover  11  and the pump  31 . 
         [0024]    The flow guide  21  has a disk shape. The side of the glow guide  21  facing the pump  31  is annually formed with a first passage  22 . The flow guide  21  is formed with a first connecting hole  23  via which the first passage  22  is connected with the inlet  12 . The side of the flow guide  21  facing the cover  11  is annually formed with a second passage  24  connected with the outlet  13 . The second passage  24  is formed with a second connecting hole  25  that at least goes through the flow guide  21 . 
         [0025]    The pump  31  is a hollow shell whose inside has a transmission space  32 . The pump  31  has several pressurizing chambers  33 , each of which has an incoming compartment  34 , an outgoing compartment  35  and several pressurizing tanks  36 . Each of the pressurizing tanks  36  has a piston  37  to perform a reciprocal motion along the inner wall of the pressurizing tank  36 . The inner wall of the pressurizing tank  36  is provided with at least one check ring  361  with a V-shaped cross section. Each of the check rings  361  urges against the surrounding of the piston  37 . 
         [0026]    The incoming compartment  34  is in fluid communications with the pressurizing tanks  36  via an incoming passage  341 . The outgoing compartment  35  is in fluid communications with the pressurizing tanks  36  via an outgoing passage  351 . The incoming compartment  34  is further in fluid communications with the first passage  22  of the flow guide  21 , and the outgoing compartment  35  to the second connecting hole  25  of the flow guide  21 . A first check valve  38  is interposed between the incoming compartment  34  and the first passage  22  for the fluid to flow in one way into the incoming compartment  34 . A second check valve  39  is interposed between the outgoing compartment  35  and the second connecting hole  25  for the fluid to flow in one way into the second connecting hole  25 . In this embodiment, the inside of the pump  31  is formed three equally spaced pressurizing chambers  33 . Each of the pressurizing chambers  33  has two pressurizing tanks  36  in fluid communications with the corresponding incoming compartments  34  and outgoing compartments  35 . 
         [0027]    The main axle  41  axially goes through the transmission space  32  inside the pump  31 . One end of the main axle  41  extends out of the pump  31  for the connection of a driving device  51  to rotate the main axle  41 . The end of the main axle  41  inside the transmission space  32  is formed with an eccentric part  42  off the center thereof. The eccentric part  42  is mounted with at least one bearing  43 , which is then mounted with a transmission element  44  in the shape of a hollow tube. The bearing  43  has an inner ring  431  and an outer ring  432 . The inner ring  431  of the bearing  43  is in touch with the surrounding of the eccentric part  42  of the main axle  41 . The outer ring  432  of the bearing  43  is in touch with the inner rim of the transmission element  44 . The transmission element has pivotal connecting parts  441  opposite to the pressurizing tanks  36  of each of the pressurizing chambers  33 . Each of the pivotal connecting parts  441  is pivotally connected with a connecting shaft  45 . The other end of each of the connecting shafts  45  is pivotally connected to the bottom of the piston  37  in the corresponding pressurizing tank  36 . When the main axle  41  rotates, the eccentric part  42  and the bearing  43  drive the transmission element  44  to swing eccentrically. The connecting shafts  45  pivotally connected with the transmission element  44  are driven to make the corresponding pistons  37  to perform a reciprocal motion along the corresponding pressurizing tanks  36 . As the pistons  37  perform the reciprocal motion, the space volume in the pressurizing tanks  36  varies, directly pushing the fluid therein to increase its pressure. 
         [0028]    To further explain the characters, technical details and effects of the invention, the usage of the invention is further described below. 
         [0029]    As shown in  FIG. 5 , when the fluid enters the pump cover  11  via the inlet  12 , it flows into the first passage  22  via the first connecting hole  23  of the flow guide  21 . The fluid is then distributed into the incoming compartments  34  of the pressurizing chambers  33 . 
         [0030]    When the driving device  51  rotates the main axle  41 , as shown in  FIGS. 6 and 7 , the eccentric part  42  of the main axle  41  and the bearing  43  also drive the transmission element  44  to swing eccentrically. The connecting shafts  45  pivotally installed on the transmission element  44  then drive the pistons  37  of the corresponding pressurizing tanks  36  to perform a reciprocal motion. Hence, the fluid in the pressurizing tanks  36  is pushed to increase the pressure thereof. A first check valve  38  is interposed between the incoming compartment  34  and the first passage  22  to ensure the one-way flow of the fluid. The pressurized fluid can only enter the second passage  24  of the flow guide  21  via the second check valve  39  of the outgoing compartment  35 . As shown in  FIG. 8 , the fluid pressurized by the pistons  37  of the pressurizing tanks  36  enters the second connecting holes  25  of the flow guide  21  via the outgoing chamber  35 . The fluid is then guided by the second connecting holes  25  into the second passage  24 . Finally, the pressurized fluid is expelled output via the outlet  13  of the cover  11 . 
         [0031]    According to the above description, the reciprocal motion of the piston  37  in each of the pressurizing tanks  36  can increase the pressure of the output fluid. Therefore, the invention has a better structural strength against damages. Moreover, the pressurizing method using the pistons  37  can readily meet the high-pressure output demand. The invention can increase the number of pressurizing tanks  36  in each of the pressurizing chambers  33  to promote the pressurizing efficiency thereof. 
         [0032]    Although the invention has been described with reference to specific embodiments, this description is not meant to be construed in a limiting sense. Various modifications of the disclosed embodiments, as well as alternative embodiments, will be apparent to people skilled in the art. Therefore, it is contemplated that the appended claims will cover all modifications that fall within the true scope of the invention.