Patent Publication Number: US-2022211207-A1

Title: Spiral water filling device

Description:
TECHNICAL FIELD 
     The disclosure relates to a spiral water filling device, particularly to a spiral water filling device with water entering via a rotating shaft. 
     RELATED ART 
     Spiral water filling devices are primarily applied to coffee brewing machines. The spiral water filling actions which simulate hand brewed coffee can maintain uniform quality in comparison with manual brewing. Related-art spiral water filling devices usually use a motor to drive an upright rotating shaft to rotate by itself. A lower end of the rotating shaft is provided with a carrier mounted by a water filling head. While the carrier is rotating, the motor further horizontally moves the water filling head on the carrier. As a result, the water filling head can be driven to horizontally move on a level along a spiral path. However, the water filling head is driven by a screw rod to be horizontally movable on the carrier, and a central axial line of the screw rod perpendicularly intersects a central axial line of the rotating shaft. Thus, interference may occur if a water filling soft pipe is connected over the water filling head. A related-art water filling soft pipe arrangement is to connect the pipe to a lateral side of the water filling head under the carrier. When operating, interference may still occur. Also, the water filling head is not straight tube and needs to be further provided with a fastener structure. Thus, fabrication of the water filling head is not easy. 
     In view of this, the inventors have devoted themselves to the above-mentioned related-art, researched intensively and cooperated with the application of science to try to solve the above-mentioned problems. Finally, the disclosure which is reasonable and effective to overcome the above drawbacks is provided. 
     SUMMARY OF THE DISCLOSURE 
     The disclosure provides a spiral water filling device with water entering via a rotating shaft. 
     The disclosure provides a spiral water filling device which includes a fixing base, a rotating shaft tube, a motor, a carrier frame, a reciprocating screw, a transmission gear set, a nut slider, and a water filling soft pipe. The rotating shaft tube is pivotally disposed on the fixing base. The motor is fixed on the fixing base and engages with an outer wall of the rotating shaft tube to drive the rotating shaft tube. The carrier frame is connected with the rotating shaft tube to rotate in conjunction with the rotating shaft tube and is provided with a first guiding structure. The reciprocating screw is pivotally disposed on the carrier frame and is perpendicular to the rotating shaft tube and parallel to the first guiding structure. A central axial line of the reciprocating screw and a central axial line of the rotating shaft tube are non-intersected. The transmission gear set is connected between the rotating shaft tube and the reciprocating screw to make the rotating shaft tube drive the reciprocating screw. The nut slider is connected and engages with the reciprocating screw. The nut slider has a water outlet and a second guiding structure attached on the first guiding structure. The water outlet is parallel to the rotating shaft tube. The water filling soft pipe passes through the rotating shaft tube and connected with the water outlet. 
     In the spiral water filling device of the disclosure, the transmission gear set includes an annular bevel gear, a regular gear and a reduction gear, the annular bevel gear surrounds the rotating shaft tube, the regular gear is coaxially connected with the reciprocating screw, the reduction gear includes a bevel gear end and a regular gear end coaxially arranged, the bevel gear end engages with the annular bevel gear, and the regular gear end engages with the regular gear. A first thread groove and a second thread groove are disposed on an outer side wall of the reciprocating screw opposite in spiral direction and intersected with each other. 
     In the spiral water filling device of the disclosure, the nut slider is provided with a key bar which engages with the reciprocating screw. The key bar is pivotally disposed in the nut slider to deflect. 
     In the spiral water filling device of the disclosure, the carrier frame has a guiding trough, and the water outlet perpendicularly penetrates the guiding trough and is slidable along the guiding trough. 
     In the spiral water filling device of the disclosure, the guiding trough is perpendicular to the rotating shaft tube and parallel to the reciprocating screw. A central axial line of the guiding trough intersects the central axial line of the rotating shaft tube. 
     In the spiral water filling device of the disclosure, the first guiding structure and the second guiding structure are a plane respectively, or the first guiding structure is a rod and the second guiding structure is a channel. 
     When using the spiral water filling device of the disclosure, the reciprocating screw is arranged on a side near the rotating shaft tube to make the water filling soft pipe pass through the rotating shaft tube and extend into the carrier frame to connect with the water outlet. As a result, the water filling soft pipe of the spiral water filling device of the disclosure may be hidden inside. Apart from aesthetic appearances, no interference occurs when the water outlet is moving. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIGS. 1 and 2  are perspective schematic views of the spiral water filling device of the first embodiment of the disclosure; 
         FIGS. 3 and 4  are exploded schematic views of the spiral water filling device of the first embodiment of the disclosure; 
         FIGS. 5 and 6  are cross-sectional schematic views of the spiral water filling device of the first embodiment of the disclosure; 
         FIG. 7  is a schematic view of another implementation of the spiral water filling device of the first embodiment of the disclosure; and 
         FIG. 8  is a perspective schematic view of the spiral water filling device of the second embodiment of the disclosure. 
     
    
    
     DETAILED DESCRIPTION OF THE DISCLOSURE 
     Please refer to  FIGS. 1-6 . The first embodiment of the disclosure provides a spiral water filling device, which includes a fixing base  100 , a rotating shaft tube  200 , a motor  300 , a carrier frame  400 , a reciprocating screw  500 , a transmission gear set  600 , a nut slider  700  and a water filling soft pipe  800 . 
     The rotating shaft tube  200  is pivotally disposed on the fixing base  100 . The motor  300  is fixed on the fixing base  100  and engages with an annular regular tooth  210  on an outer surface of the rotating shaft tube  200  to drive the rotating shaft tube  200 . The carrier frame  400  is connected with the rotating shaft tube  200  to rotate in conjunction with the rotating shaft tube  200 . The carrier frame  400  is provided with a first guiding structure  401 . The reciprocating screw  500  is pivotally disposed on the carrier frame  400 . The reciprocating screw  500  is perpendicular to the rotating shaft tube  200  and parallel to the first guiding structure  401 . The reciprocating screw  500  is arranged on a side near the rotating shaft tube  200 . Thus, a central axial line of the reciprocating screw  500  and a central axial line of the rotating shaft tube  200  are non-intersected. 
     The transmission gear set  600  is connected between the rotating shaft tube  200  and the reciprocating screw  500  to make the rotating shaft tube  200  drive the reciprocating screw  500 . In detail, the transmission gear set  600  includes an annular bevel gear  610 , a regular gear  620 , and a reduction gear  630 . The annular bevel gear  610  surrounds the rotating shaft tube  200 . The regular gear  620  is coaxially connected with the reciprocating screw  500 . The reduction gear  630  includes a bevel gear end  631  and a regular gear end  632  coaxially arranged. The bevel gear end  631  engages with the annular bevel gear  610  and the regular gear end  632  engages with the regular gear  620 . A first thread groove  510  and a second thread groove  520  are disposed on an outer side wall of the reciprocating screw  500 . The first thread groove  510  and the second thread groove  520  are opposite in spiral direction and intersected with each other. 
     The nut slider  700  engages with the reciprocating screw  500  and the reciprocating screw  500  is sheathed with the nut slider  700 . In detail, the nut slider  700  has a key bar  710  which engages with the reciprocating screw  500 . The key bar  710  is pivotally disposed in the nut slider  700  to deflect to engage with the first thread groove  510  or the second thread groove  520 . The first guiding structure  401  and the second guiding structure  701  are respectively formed into a plane or a curved surface, which are slidably attached to each other. In this embodiment, the first guiding structure  401  and the second guiding structure  701  are respectively formed into a plane, which are slidably attached to each other. The first guiding structure  401  is formed as an inner top surface of the carrier frame  400 . The second guiding structure  701  is formed as an outer top surface of the nut slider  700  and is attached on the inner top surface of the carrier frame  400 . The reciprocating screw  500  is perpendicular to the rotating shaft tube  200  and parallel to the inner top surface of the carrier frame  400 . The first guiding structure  401  and the second guiding structure  701 , which are attached to each other, may prevent the reciprocating screw  500  from driving the nut slider  700  to rotate, so the key bar  710  may move along the first thread groove  510  or the second thread groove  520  to further reciprocatingly move the nut slider  700  along the reciprocating screw  500  longitudinally. 
     The nut slider  700  has a water outlet  710  and a second guiding structure  701  attached on the first guiding structure  401 . The water outlet  710  is parallel to the rotating shaft tube  200 . The carrier frame  400  is disposed with a guiding trough  402 . The water outlet  710  perpendicularly penetrates the guiding trough  402  and is slidable along the guiding trough  402 . The guiding trough  402  is perpendicular to the rotating shaft tube  200  and parallel to the reciprocating screw  500 . A central axial line of the guiding trough  402  intersects the central axial line of the rotating shaft tube  200 . When the nut slider  700  is moving, the nut slider  700  may drive the water outlet  710  to reciprocatingly move along the rotating shaft tube  200  radially. 
     When using the spiral water filing device of the disclosure, the motor  300  drives the carrier frame  400  to rotate about the rotating shaft tube  200  as central axis, and the reciprocating screw  500  is driven through the transmission gear set  600  to linearly and reciprocatingly move the water outlet  710  along the rotating shaft tube  200  radially. Therefore, the water outlet  710  may horizontally move along the spiral path. By the above-mentioned arrangement, the reciprocating screw  500  is arranged on a side near the rotating shaft tube  200  to make the water filling soft pipe  800  pass through the rotating shaft tube  200  and extend into the carrier frame  400  to connect with the water outlet  710 . As a result, the water filling soft pipe  800  of the spiral water filling device of the disclosure may be hidden inside. Apart from aesthetic appearances, no interference may occur when the water outlet  710  is moving. In this embodiment, the water outlet  710  may be pivotally disposed on the nut slider  700  along the central axis thereof. Thus, when the water outlet  710  is moving horizontally, rotation is tolerable and the water filling soft pipe  800  is prevented from being twisted. 
     Please refer to  FIG. 7 , which shows another implementation of the first guiding structure  401  and the second guiding structure  701 . The first guiding structure  401  and the second guiding structure  701  are respectively formed into a plane or a curved surface, which are slidably attached to each other. The first guiding structure  401  may be formed as an inner side of the carrier frame  400  and the second guiding structure  701  is formed as an outer side of the nut slider  700  to be attached to the inner side of the carrier frame  400 . The reciprocating screw  500  is perpendicular to the rotating shaft tube  200  and parallel to the inner side of the carrier frame  400 . The first guiding structure  401  is attached to the second guiding structure  701  to prevent the reciprocating screw  500  from driving the nut slider  700  to rotate. Furthermore, the key bar  710  may move along the first thread groove  510  or the second thread groove  520  to reciprocatingly move the nut slider  700  along the reciprocating screw  500  longitudinally. 
     Please refer to  FIG. 8 . The second embodiment of the disclosure provides a water filling device, which includes a fixing base  100 , a rotating shaft tube  200 , a motor  300 , a carrier frame  400 , a reciprocating screw  500 , a transmission gear set  600 , a nut slider  700  and a water filling soft pipe  800 . This embodiment is similar to the above-mentioned first embodiment. The difference between this embodiment and the first embodiment is that the first guiding structure  401   a  is a rod and the second guiding structure  701   a  is a channel correspondingly. The first guiding structure  401   a  movably passes through the second guiding structure  701   a  and an outer wall surface of the rod is attached to an inner wall surface of the channel. The reciprocating screw  500  is perpendicular to the rotating shaft tube  200  and parallel to the rod. The first guiding structure  401   a  is attached to the second guiding structure  701   a  to prevent the reciprocating screw  500  from driving the nut slider  700  to rotate. Furthermore, the key bar  710  may move along the first thread groove  510  or the second thread groove  520  to reciprocatingly move the nut slider  700  along the reciprocating screw  500  longitudinally. 
     It will be appreciated by persons skilled in the art that the above embodiments have been described by way of example only and not in any limitative sense, and that various alterations and modifications are possible without departure from the scope of the disclosure as defined by the appended claims.