Patent Publication Number: US-2022218142-A1

Title: Pressure-adjustable pneumatic system of soda machine

Description:
CROSS-REFERENCE TO RELATED APPLICATION(S) 
     This application is a 371 International Patent Application No. PCT/CN2020/089795, filed on May 12, 2020, which claims the priority and benefit of Chinese patent application number 201920694207.1, filed May 14, 2019 with China National Intellectual Property Administration, the entire contents of which are incorporated herein by reference. 
    
    
     TECHNICAL FIELD 
     The present utility model relates to a soda machine, in particular to a pneumatic system of a soda machine. 
     BACKGROUND 
     At present, in the prior art, Chinese patent application 201920547808.X, filed on Apr. 19, 2019, is entitled as PNEUMATIC SYSTEM OF SODA MACHINE INTEGRATING AIR INLET, DRIVING, PRESSURE RELIEF AND EXHAUST. A pneumatic system of soda machine integrating air inlet, driving, pressure relief and exhaust comprises an upper cover  1 , an air inlet support  2 , an air distribution valve  3 , a support base  4 , a sub-machine support  5 , an air inlet nozzle assembly  6 , a truncated cone sleeve  7 , a safety valve  8  and a piston-type pressure driving device  9 . As shown in  FIG. 1 ,  FIG. 2  and  FIG. 3 , the exhaust driving pipeline  33  is provided with an interface  331 , the piston-type pressure driving device  9  is fixed on the air inlet support  2 , and the piston pressure driving device  9  is communicated with the interface  331 . As shown in  FIG. 1  and  FIG. 3 , the piston-type pressure driving device  9  comprises a cylinder  91  with an open end, an air inlet interface  911  provided at the air inlet end of the cylinder, a piston  92 , a sealing rubber plug  921 , an ejector rod  93  connected with the piston, a spring and a push rod nut  94 , wherein the open end of the cylinder  91  is provided with internal threads; the push rod nut  94  comprises a body part  941 , an operating part  942  surrounding the body part for rotating a tool, an upper guide hole  943  provided on the body part and a counter hole  944 ; the body part  941  comprises an external thread part and a sealing part; the air inlet interface  911  is inserted into the interface  331  of the exhaust driving pipeline  33 , the sealing rubber plug  921  is provided at one end of the piston  92 , the sealing rubber plug  921  is fitted with the closed air inlet of the cylinder  92 , the spring is sleeved on the ejector rod  93 , the external thread of the push rod nut  94  is screwed with the internal thread of the cylinder  91 ; the spring extends into the counter bore  944 , and the ejector rod  93  extends through the guide hole  943 . The ejector rod drives the locking mechanism of the air outlet valve of the main body. The existing problem is that when the elasticity of the spring in the piston-type pressure drive device is adjusted, the adjustment can only be carried out after disassembly, so that the pressure drive of the soda bottle of the sub-machine is adjusted. 
     SUMMARY 
     The purpose of the present utility model is to provide a pressure-adjustable pneumatic system of a soda machine, which can conveniently adjust the elasticity of the spring, keep different pressures in the soda bottle, and manufacture soda with different concentrations. 
     The present utility model is realized as follows: a pressure-adjustable pneumatic system of a soda machine, comprising an upper cover, an air inlet support, an air distribution valve, a sub-machine support, a safety valve, and a piston-type pressure driving device, wherein the air distribution valve comprises an air inlet cavity, an air inlet interface communicated with the air inlet cavity, an exhaust cavity surrounding the air inlet cavity, an exhaust driving pipeline communicated with the exhaust cavity, and an exhaust valve provided on the exhaust driving pipeline, the exhaust driving pipeline is provided with an interface, the piston-type pressure driving device comprises a cylinder with an open end, an air inlet interface provided at the air inlet end of the cylinder, a piston, a sealing rubber plug, an ejector rod connected with the piston, a spring and a push rod nut, wherein the open end of the cylinder is provided with internal threads; the push rod nut comprises a body part, an operating part surrounding the body part, an upper guide hole provided on the body part and a counter hole; the body part comprises an external thread part and a sealing part; the sealing rubber plug is provided at one end of the piston, the sealing rubber plug is fitted with the closed air inlet of the cylinder, the spring is sleeved on the ejector rod, the external thread of the push rod nut is screwed with the internal thread of the cylinder; the spring extends into the counter bore, the ejector rod extends through the guide hole, the piston-type pressure driving device is fixed on the air inlet support, the air inlet interface is inserted into the interface; the sub-machine support is connected with the outer cover and the lower end of the air inlet support; wherein the upper cover is provided with a knob hole; the operating part is provided with a shaft head; the air inlet support is provided with a circular counter bore, the bottom plate of the circular counter bore is provided with a through hole, and the through hole is opposite to the shaft head; 
     the system further comprises a driving base, a knob, a driving gear, a driving wheel set, a driven wheel set, and a drive gear; 
     the driving base comprises a circular base cavity, a driving wheel set base and a driven wheel set base, wherein the circular base cavity is communicated with the driving wheel set base; the driving wheel set comprises a first gear, a second gear and a fixed shaft; the driven wheel set comprises a speed reducing wheel, a driven wheel and a rotating shaft, the driven wheel comprises a shaft body, a cylinder with an open lower part and teeth provided at the open end of the cylinder; 
     the driving base is fixed on the air inlet support, the lower shaft body of the driving gear is rotatably fitted with the bottom plate of the circular base cavity, the connecting rod at the upper end is connected with the connecting part of the knob; the first gear and the second gear are provided vertically and pivotedly connected to a driving wheel set base by means of a fixed shaft, the first gear is engaged with the driving gear; a rotating shaft is rotatably fitted with a driven wheel set base, the upper end of the rotating shaft is fixedly connected to a speed reducing wheel, and the lower end of the rotating shaft is connected to a shaft body of a driven gear; 
     the drive gear is fixedly connected to a shaft head, the drive gear extends into a circular counter bore through a through hole, and the driven gear is located in the circular counter bore and engaged with the drive gear; and a handheld part of the knob extends out of the upper cover through a knob hole. 
     According to the pressure-adjustable pneumatic system of a soda machine, the lower end of the shaft base of the first gear of the driving wheel set is provided with a sub-clutch sleeve, the upper end of the shaft base of the second gear is provided with a female clutch sleeve, and the upper end of the fixed shaft is provided with an external thread; 
     the upper base plate of the driving wheel set base is provided with a threaded hole, and the lower base plate is provided with a fixed hole; 
     the system further comprises a tension spring, 
     the upper end of the fixed shaft is screwed with the threaded hole and the lower end thereof is inserted with the fixed hole; the tension spring is sleeved on the fixed shaft; the upper end and the lower end of the tension spring are fitted with the shaft base and the lower base plate of the second gear, respectively; and the sub-clutch sleeve and the female clutch sleeve are engaged. 
     According to the pressure-adjustable pneumatic system of a soda machine, the driving base is provided with a gear cavity, and the gear cavity is communicated with the cylindrical base through a guide hole; 
     the system further comprises a sliding rod and a pressure spring, wherein the sliding rod is provided with a spring base plate; 
     the driven end of the sliding rod passes through a pressure spring, one end of the pressure spring is fitted with the end plate of the gear cavity and the other end thereof is fitted with the spring base plate, and the driving end of the sliding rod is fitted with the gear hole on the connecting part of the knob through the guide hole. 
     The present utility model relates to a pressure-adjustable pneumatic system of a soda machine. Since such a structure is used, the knob is rotated, the drive gear drives a push rod nut to rotate, and the elasticity of a spring is adjusted, so that the internal pressure of an exhaust driving pipeline drives a piston, the purpose of making soda having different concentrations is achieved, and adjustment is convenient. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a cross-sectional view of the prior art. 
         FIG. 2  is a view A-A of  FIG. 1 . 
         FIG. 3  is a view B-B of  FIG. 1 . 
         FIG. 4  is a perspective view of the present utility model. 
         FIG. 5  is a cross-sectional view of the present utility model. 
         FIG. 6  is a view C-C of  FIG. 5 . 
         FIG. 7  is a view D-D of  FIG. 6 . 
         FIG. 8  is a top view of a driving mechanism according to the present utility model. 
         FIG. 9  is a view E-E of  FIG. 8 . 
     
    
    
     DETAILED DESCRIPTION OF THE EMBODIMENTS 
     The present utility model will be further described with reference to the attached drawings. 
     As shown in  FIG. 1 , a pressure-adjustable pneumatic system of a soda machine comprises an upper cover  1 , an air inlet support  2 , an air distribution valve  3 , a sub-machine support  5 , a safety valve  8 , and a piston-type pressure driving device  9 . The air distribution valve  3  comprises an air inlet cavity  31 , an air inlet interface  311  communicated with the air inlet cavity, an exhaust cavity  32  surrounding the air inlet cavity, an exhaust driving pipeline  33  communicated with the exhaust cavity, and an exhaust valve  34  provided on the exhaust driving pipeline. The exhaust driving pipeline  33  is provided with an interface  331 . The piston-type pressure driving device  9  comprises a cylinder  91  with an open end, an air inlet interface  911  provided at the air inlet end of the cylinder, a piston  92 , a sealing rubber plug  921 , an ejector rod  93  connected with the piston, a spring and a push rod nut  94 . The open end of the cylinder  91  is provided with internal threads. The push rod nut  94  comprises a body part  941 , an operating part  942  surrounding the body part, an upper guide hole  943  provided on the body part and a counter hole  944 . The body part  941  comprises an external thread part and a sealing part. The sealing rubber plug  921  is provided at one end of the piston  92 . The sealing rubber plug  921  is fitted with the closed air inlet of the cylinder  91 . The spring is sleeved on the ejector rod  93 . The external thread of the push rod nut  94  is screwed with the internal thread of the cylinder  91 . The spring extends into the counter bore  944 . The ejector rod  93  extends through the guide hole  943 . The piston-type pressure driving device  9  is fixed on the lower surface of the air inlet support  2 . The air inlet interface  911  is inserted into the interface  331 . The sub-machine support  5  is connected with the outer cover  1  and the lower end of the air inlet support  2 . 
     The upper cover  1  is provided with a knob hole  1 A. The operating part  942  is provided with a shaft head  9421 ; the air inlet support  2  is provided with a circular counter bore  2 A, the bottom plate of the circular counter bore  2 A is provided with a through hole, and the through hole is opposite to the shaft head  9421 . 
     The system further comprises a driving base  41 , a knob  42 , a driving gear  43 , a driving wheel set  44 , a driven wheel set  45 , and a drive gear  46 . 
     The driving base  41  comprises a circular base cavity  411 , a driving wheel set base  412  and a driven wheel set base  413 , wherein the circular base cavity  411  is communicated with the driving wheel set base  412 . 
     The driving wheel set  44  comprises a first gear  441 , a second gear  442  and a fixed shaft  443 . The driven wheel set  45  comprises a speed reducing wheel  451 , a driven wheel  452  and a rotating shaft  453 . The driven wheel  452  comprises a shaft body  4521 , a cylinder  4522  with an open lower part and teeth provided at the open end of the cylinder. 
     The driving base  41  is fixed on the air inlet support  2 . The lower shaft body of the driving gear  43  is rotatably fitted with the bottom plate of the circular base cavity  411 . The connecting rod at the upper end is connected with the connecting part  421  of the knob  42 . The body part  422  of the knob  42  is rotatably fitted with the circular base cavity  411 . The first gear  441  and the second gear  442  are provided vertically and pivotedly connected to a driving wheel set base  412  by means of a fixed shaft  443 . The first gear  441  is engaged with the driving gear  43 . A rotating shaft  453  is rotatably fitted with a driven wheel set base  413 . The upper end of the rotating shaft is fixedly connected to a speed reducing wheel  451 , and the lower end of the rotating shaft is connected to a shaft body  4521  of a driven gear  452 . 
     The drive gear  46  is fixedly connected to a shaft head  9421 . The drive gear  46  extends into a circular counter bore  2 A through a through hole. The driven gear  452  is located in the circular counter bore  2 A and engaged with the drive gear  46 . A handheld part  421  of the knob  42  extends out of the upper cover  1  through a knob hole  1 A. 
     The lower end of the shaft base of the first gear  441  of the driving wheel set  44  is provided with a sub-clutch sleeve  4411 , the upper end of the shaft base of the second gear  442  is provided with a female clutch sleeve  4421 , and the upper end of the fixed shaft  443  is provided with an external thread. 
     The upper base plate of the driving wheel set base  412  is provided with a threaded hole  4121 , and the lower base plate is provided with a fixed hole  4122 . 
     The system further comprises a tension spring  444 . 
     The upper end of the fixed shaft  443  is screwed with the threaded hole  4121  and the lower end thereof is inserted with the fixed hole  4122 . The tension spring  444  is sleeved on the fixed shaft  443 . The upper end and the lower end of the tension spring  444  are fitted with the shaft base and the lower base plate of the second gear  442 , respectively. The sub-clutch sleeve  4411  and the female clutch sleeve  4421  are engaged. 
     The driving base  41  is provided with a gear cavity  414 , and the gear cavity  414  is communicated with the cylindrical base  411  through a guide hole. 
     The system further comprises a sliding rod  61  and a pressure spring  62 , wherein the sliding rod  61  is provided with a spring base plate  611 . 
     The driven end  612  of the sliding rod  61  passes through a pressure spring  62 . One end of the pressure spring  62  is opposite to the end plate of the gear cavity  414  and the other end thereof is fitted with the spring base plate  611 . The driving end of the sliding rod  61  is fitted with the gear hole on the connecting part  421  of the knob  42  through the guide hole. 
     The above is only the preferred embodiment of the present utility model. It should be pointed out that several improvements and modifications can be made without departing from the principle of the present utility model for those skilled in the art, which is also regarded as the scope of protection of the present utility model.