CN211924437U - High-load long-service-life transmission device of vertical eccentric rotary diaphragm pump - Google Patents

Abstract

The utility model discloses a high load long-life transmission of vertical eccentric rotatory diaphragm pump, including the eccentric wheel, the transmission shaft, support frame cooperation bag seat and axle sleeve realize the transmission, the eccentric wheel is installed on motor output shaft, the eccentric position of eccentric wheel forms the lower groove, the lower extreme of transmission shaft is planted in the lower groove of eccentric wheel and the contact, the middle section position of transmission shaft is fixed in the support frame and drives the support frame, the central point department of putting of bag seat forms the centre bore, the axle sleeve is the components of a whole that can function independently shaping with the bag seat, axle sleeve fastening installation is in the centre bore, the center of axle sleeve forms the upper groove, the upper end of transmission shaft is planted in the upper groove of axle sleeve and is. The utility model discloses a different materials can be selected respectively to axle sleeve and bag seat, both satisfied transmission shaft and the problem of upper groove wearability, guarantee the rigidity intensity of bag seat under the high pressure load in utricule compression expansion motion again, are fit for the long-time use of high load, guarantee that the transmission is normal, effective, the cost of spare part is lower.

Description

High-load long-service-life transmission device of vertical eccentric rotary diaphragm pump

Technical Field

The utility model relates to a technical field of diaphragm pump, concretely relates to transmission of vertical eccentric rotary diaphragm pump, the high load transmission of specially adapted to increase of service life.

Background

In the prior art, as shown in fig. 1 to 5, a vertical eccentric rotary diaphragm pump is generally formed by connecting a motor 10 and a base 20 together by using screws, wherein an eccentric wheel 30 is fixedly installed on an output shaft of the motor, a transmission shaft 40 is fixed in a support frame 50, the lower end of the transmission shaft 40 is in contact with a lower groove a of the eccentric wheel 30, the upper end of the transmission shaft is in contact with an upper groove b at the central position of a capsule seat 60, a capsule 70 is sleeved in the capsule seat 60 from above, the bottom of the capsule 70 is connected to a support arm of the support frame 50, a top cover 80 is arranged on the capsule seat 60, and the top cover 80, the capsule 70, the capsule seat 60 and the base 20 are fixed. When the fluid pump works, the motor 10 is driven to the eccentric wheel 30 to drive the transmission shaft 40 to eccentrically rotate, so that the supporting arm of the supporting frame 50 moves up and down to drive the capsule 70 to suck or extrude, and fluid is pumped out.

Wherein, the structure of the transmission device in the prior art, as shown in fig. 6, substantially comprises an eccentric wheel 30, a transmission shaft 40 and a supporting frame 50, and cooperates with a capsule seat 60 to realize the transmission function, the inventor carefully analyzes the structure and finds that the following problems exist:

firstly, an upper groove b at the central position of the bag seat 60 is arranged on the bag seat 60 in an integral injection molding mode; considering that the upper groove b is in contact with the transmission shaft 40 for transmission, the bag seat 60 must be made of wear-resistant material; however, the wear-resistant material is weak in temperature resistance and rigidity strength, and if the whole capsule seat 60 is made of wear-resistant and high-temperature-resistant materials, the cost is high, so that the capsule seat 60 is usually made of a material with good wear resistance but poor high-temperature resistance; however, high temperature is easily generated in a high-load long-time operation occasion, so that the bag seat 60 is easily collapsed and deformed in use or the upper groove b is seriously abraded, even fails; in this regard, this integrally injection molded capsule seat 60 configuration is not suitable for high load, long term use;

secondly, the transmission shaft 40 is in contact with an upper groove b of the capsule seat 60, and the upper groove b is a conical horn mouth, so that the risks of dead jacking and load current rising are easy to occur; the requirement on the press-in assembly precision of the eccentric wheel 30 and the motor output shaft is high;

thirdly, the transmission shaft 40 and the support frame 50 are in a press-in interference fit mode, the holding force of the transmission shaft 40 and the support frame 50 depends on the interference magnitude, material hardness and contact area of the inner diameter of the shaft hole of the support frame 50, and the transmission shaft 40 is easy to loosen and lose efficacy on the application occasions of high-load long-time operation;

fourthly, the transmission shaft 40 of the transmission device can also be replaced by a special-shaped shaft 40 ', and as shown in fig. 7, the special-shaped shaft 40' is composed of a section of round shaft with a large outer diameter at the central part and round shafts with small outer diameters at two ends, and the round shaft with the large outer diameter is also processed into a knurling shaft in order to improve the torque holding force of the special-shaped shaft 40 'and the support frame 50, so that the special-shaped shaft 40' is high in processing cost and is not suitable for mass production.

SUMMERY OF THE UTILITY MODEL

To the problem that exists among the prior art, the utility model aims to provide a high load long-life transmission of vertical eccentric rotary diaphragm pump to be fit for the long-time use of high load, ensure that the transmission is normal, effective.

In order to achieve the above purpose, the solution of the present invention is:

a high-load long-life transmission device of a vertical eccentric rotary diaphragm pump comprises an eccentric wheel, a transmission shaft, a support frame, a bag seat and a shaft sleeve to realize transmission, wherein the eccentric wheel is arranged on a motor output shaft for providing working power of the diaphragm pump, the motor output shaft is positioned on a longitudinal axis of the diaphragm pump, a lower groove is formed at the eccentric position of the eccentric wheel, the lower end of the transmission shaft is inserted into the lower groove of the eccentric wheel, the lower end of the transmission shaft is contacted with the lower groove to drive the transmission shaft to rotate by the eccentric wheel, the middle section part of the transmission shaft is fixed in the support frame and drives the support frame to rotate along with the transmission shaft, the bag seat for installing a bag body is provided with a central hole at the central position, the central line of the central hole is positioned on the longitudinal axis of the diaphragm pump, the shaft sleeve and the bag seat are formed, and the upper end of the transmission shaft is contacted with the upper groove of the shaft sleeve and is supported by the inner wall of the upper groove to rotate.

Further, the shaft sleeve is made of self-lubricating wear-resistant plastic materials, such as POM and PEEK; the capsule seat is made of plastic material with high temperature resistance and high strength, such as PPA, PA and PC containing glass fiber; the shaft sleeve and the capsule seat are in split injection molding, and the shaft sleeve is pressed into a central hole of the capsule seat through interference fit.

Furthermore, the inner diameter of the central hole of the capsule seat is in a shape of being large at the top and small at the bottom, a step is arranged in the middle, the outer diameter of the shaft sleeve is also in a shape of being large at the top and small at the bottom, a convex wall is arranged on the step, the outer wall of the convex wall is in interference fit with the inner wall of the upper part of the central hole, and the shaft sleeve is fixedly arranged in the central hole of the capsule seat from top to bottom.

Furthermore, the shaft sleeve is in a shape that the upper end is closed, the lower end forms an upper groove, the upper groove is provided with a conical horn mouth, and the upper end of the transmission shaft is contacted with the inner wall of the conical horn mouth of the shaft sleeve.

Further, the upper groove shape of the shaft sleeve is as follows: the mouth part is a conical horn mouth, the bottom part is a cylindrical surface counter bore, and the inclined plane angle of the conical horn mouth is larger than the inclination angle of the transmission shaft.

Furthermore, the outer diameter part of the upper end of the transmission shaft is contacted with the cylindrical surface counter bore of the shaft sleeve and the cambered surface of the transition part of the conical horn mouth, and the ball head surface of the upper end of the transmission shaft crosses the cambered surface and extends into the cylindrical surface counter bore; the depth of the cylindrical surface counter bore is enough to ensure that the upper end ball head surface of the transmission shaft is not contacted with the bottom surface of the cylindrical surface counter bore.

Further, the shape of the lower groove of the eccentric wheel is as follows: one half of the groove wall close to the eccentric wheel shaft is a conical surface, the other half of the groove wall far away from the eccentric wheel shaft is a cylindrical surface, the bottom surface of the lower groove is a plane, the lower end ball head surface of the transmission shaft is in contact with the bottom surface of the lower groove, and the round corner part of the transition of the lower end ball head surface of the transmission shaft and the outer diameter part of the transmission shaft is in contact with the bottom of the conical surface of the lower groove.

Furthermore, the central axis of the transmission shaft and the side wall of the conical surface of the lower groove of the eccentric wheel form an included angle beta of 1-5 degrees.

Furthermore, the transmission shaft is made of stainless steel, the support frame is made of high-temperature-resistant plastic materials such as PPA, PA and PC containing glass fibers, and the middle section of the transmission shaft and the support frame are fixed together through integral injection molding. And a groove tangent plane with a D-shaped section is arranged at the middle section of the transmission shaft. And straight knurling, reticulate pattern knurling or a key groove is arranged at the middle section of the transmission shaft.

The central axis of the transmission shaft and the longitudinal axis form an included angle alpha, and the ideal angle range of the alpha is 11-15 degrees.

After the scheme is adopted, compared with the prior art, the utility model, have following advantage:

the bag seat and the shaft sleeve with the upper groove are formed in a split mode and are fastened and installed together in an interference fit mode and the like, so that the shaft sleeve can be made of a self-lubricating material with a low friction coefficient, and the bag seat can be made of a high-temperature-resistant material, so that the problem of wear resistance of a transmission shaft and the upper groove (shaft sleeve) is solved, the rigidity strength of the bag seat under high-pressure load in compression and expansion movement of a bag body is ensured, the bag seat is structurally suitable for being used for a long time under high load, normal and effective transmission is ensured, and the cost of parts is lower on the whole;

secondly, the upper groove of the shaft sleeve is designed into a combined form of a conical horn mouth and a cylindrical surface counter bore, the lower groove of the eccentric wheel is designed into a combined form of a conical surface, a cylindrical surface and a plane, during assembly, the lower groove conical surface of the eccentric wheel can play a role in guiding to enable the transmission shaft to rapidly slide into the lower groove, so that the assembly is convenient, after the assembly, the lower groove conical surface of the eccentric wheel can be designed to avoid the contact of the outer diameter part of the lower end of the transmission shaft and the conical surface, the ball head surface of the lower end of the transmission shaft is contacted with the bottom surface of the lower groove, the transition round corner part of the ball head surface of the lower end of the transmission shaft and the outer diameter part of the lower groove is contacted with the bottom surface of the conical surface of the lower groove, the outer diameter part of the upper end of the transmission shaft is contacted with the counter bore of the shaft sleeve and the arc, therefore, the risk of load current rise caused by the dead jacking of the two ends of the transmission shaft is avoided, and the requirement on the press-in assembly control precision of the eccentric wheel and the motor output shaft is also reduced;

thirdly, the middle section part of the transmission shaft and the support frame are fixed together through integral injection molding, further, a groove section with a D-shaped section is arranged at the middle section part of the transmission shaft, and an injection molding body completely wraps the D-shaped groove section, so that the torque in the circumferential direction is enhanced, the shear strength in the axial direction is enhanced, the holding force between the support frame and the transmission shaft which move under a high load for a long time is greatly improved, and the reliability of the high load and the long service life is further realized; and the transmission shaft adopts a D-shaped groove section, so that the cost is low, and mass production can be realized.

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

Drawings

FIG. 1 is a combined cross-sectional view of a prior art vertical eccentric rotary diaphragm pump;

FIG. 2 is an exploded top view of a prior art vertical eccentric rotary diaphragm pump;

FIG. 3 is an exploded bottom view of a conventional vertical eccentric rotary diaphragm pump;

FIG. 4 is a top view of an assembly of a prior art vertical eccentric rotary diaphragm pump;

FIG. 5 is an exploded cross-sectional view of FIG. 4;

FIG. 6 is an enlarged view of the transmission of FIG. 4;

FIG. 7 is a schematic structural view of a conventional vertical eccentric rotary diaphragm pump using a special shaft;

fig. 8 is an exploded perspective view of the transmission of the present invention;

fig. 9 is an exploded bottom view of a vertical eccentric rotary diaphragm pump according to the present invention;

FIG. 10 is a top view of a vertical eccentric rotary diaphragm pump according to the present invention;

FIG. 11 is an exploded cross-sectional view of FIG. 10;

FIG. 12 is an assembled cross-sectional view of FIG. 10;

FIG. 13 is a partial schematic view of FIG. 12;

FIG. 14 is a schematic structural view of the propeller shaft of FIGS. 8-13;

fig. 15 is a schematic structural view of another transmission shaft according to the present invention;

fig. 16 is a schematic structural view of another transmission shaft according to the present invention.

Description of the reference symbols

The capsule body comprises a motor 10, a base 20, an eccentric wheel 30, a transmission shaft 40, a special-shaped shaft 40', a supporting frame 50, a capsule seat 60, a capsule body 70, a top cover 80, a lower groove a and an upper groove b;

the structure comprises a motor 1, a base 2, a clamp spring 21, an eccentric wheel 3, a conical surface 31, a cylindrical surface 32, a plane 33, a transmission shaft 4, a groove tangent plane 41, a straight-line knurl 42, a key groove 43, a support frame 5, a foot-pulling hole 51, a bag seat 6, a central hole 61, a step 611, a shaft sleeve 62, a convex wall 621, a conical horn mouth 63, a cylindrical surface counter bore 64, a bag body 7, a clamping ball 71, a top cover 8, a valve seat 9, an umbrella-shaped check valve plate 91, a flat check valve plate 92, a lower groove A, an upper groove B, an arc surface C, a round angle part E, a longitudinal axis L, an included.

Detailed Description

Referring to fig. 8 to 16, the high-load long-life transmission device of the vertical eccentric rotary diaphragm pump according to the present invention includes an eccentric wheel 3, a transmission shaft 4, a supporting frame 5, a bag seat 6 and a shaft sleeve 62. The eccentric wheel 3 is mounted on the output shaft of the motor 1 for providing the working power of the diaphragm pump, the output shaft of the motor 1 is positioned on the longitudinal axis L of the diaphragm pump, and the eccentric position of the eccentric wheel 3 forms a lower groove A. The lower end of the transmission shaft 4 is inserted into the lower groove A of the eccentric wheel 3, and the lower end of the transmission shaft 4 is in contact with the lower groove A, so that the eccentric wheel 3 drives the transmission shaft 4 to rotate. The middle part of the transmission shaft 4 is fixed in the support frame 5, and the support frame 5 is driven by the transmission shaft 4 to rotate along with the transmission shaft 4. The capsule seat 6 for mounting the capsule 7 forms a central hole 61 at a central position, the centre line of the central hole 61 being located on the longitudinal axis L of the membrane pump. The shaft sleeve 62 and the bag seat 6 are formed in a split mode, the shaft sleeve 62 is tightly installed in a center hole 61 of the bag seat 6, and an upper groove B is formed in the center of the shaft sleeve 62. The upper end of the drive shaft 4 is inserted into the upper groove B of the boss 62, and the upper end of the drive shaft 4 is in contact with the upper groove B of the boss 62 while the drive shaft 4 is supported for rotation by the inner wall of the upper groove B.

The utility model separately injection-molds the capsule seat 6 and the shaft sleeve 62 with the upper groove B, then presses the shaft sleeve 62 into the central hole 61 of the capsule seat 6 by interference fit and the like to be tightly installed together, thus, the shaft sleeve 62 and the capsule seat 6 can be respectively made of different materials, specifically, the shaft sleeve 62 can be made of self-lubricating wear-resistant plastic material with low friction coefficient, such as POM and PEEK, the capsule seat 6 can be made of high-temperature-resistant and high-strength plastic materials, such as PPA, PA and PC containing glass fibers, so that the problem of wear resistance when the transmission shaft 4 is matched with the groove B on the shaft sleeve 62 is solved, the rigidity strength of the capsule seat 6 under high-pressure load in the compression and expansion motion of the capsule body 7 is ensured, and as shown in a combined graph of figures 9 to 12, make the utility model discloses a transmission is structurally fit for the long-time use of high load, guarantees that the transmission is normal, effective, and moreover, the cost of spare part is lower overall.

The utility model discloses the preferred design of axle sleeve 62 is that axle sleeve 62's shape is upper end closed, the lower extreme forms upper groove B, and upper groove B has conical horn mouth 63, the upper end of transmission shaft 4 and the contact of the conical horn mouth 63 inner wall of axle sleeve 62. Further, the best shape of the upper groove B of the shaft sleeve 62 is: the mouth part is a conical horn mouth 63, the bottom part is a cylindrical surface counter bore 64, and the inclined plane angle of the conical horn mouth 63 is larger than the inclined angle of the transmission shaft 4. After assembly, the outer diameter part of the upper end of the transmission shaft 4 is contacted with the cylindrical surface counter bore 64 of the shaft sleeve 62 and the cambered surface C at the transition part of the conical horn mouth 63, and the ball head surface of the upper end of the transmission shaft 4 passes through the cambered surface C and extends into the cylindrical surface counter bore 64; the depth of cylindrical counterbore 64 is sufficient to ensure that the upper ball end face of drive shaft 4 does not contact the bottom surface of cylindrical counterbore 64.

In order to facilitate the assembly and firm combination of the capsule seat 6 and the shaft sleeve 62, the inner diameter of the central hole 61 of the capsule seat 6 is in a shape of being large at the top and small at the bottom, the middle of the central hole has a step 611, the outer diameter of the shaft sleeve 62 is also in a shape of being large at the top and small at the bottom, the upper part of the shaft sleeve 62 is provided with a convex wall 621, the shaft sleeve 62 is fixedly arranged in the central hole 61 of the capsule seat 6 from top to bottom through the convex wall 621 arranged on the step 611 and the interference fit between the outer wall of the convex wall 621 and the inner.

The utility model discloses eccentric wheel 3's preferred design is, eccentric wheel 3's low groove A shape does: one half of the groove wall close to the eccentric wheel shaft is a conical surface 31, the other half of the groove wall far away from the eccentric wheel shaft is a cylindrical surface 32, the bottom surface of the lower groove A is a plane 33, the conical surface 31 of the lower groove A of the eccentric wheel 3 is designed to avoid the contact between the outer diameter part of the lower end of the transmission shaft 4 and the conical surface 31, the best design is that the central axis of the transmission shaft 4 and the side wall of the conical surface 31 of the lower groove A of the eccentric wheel 3 form an included angle beta, if the included angle beta is too large, the constraint on the transmission shaft is small, and if the included angle beta is too small, the heat dissipation performance and the oil storage space are not good, so the. The conical surface 31 of the lower groove a of the eccentric wheel 2 can play a role of guiding when assembling, so that the transmission shaft 4 can conveniently and quickly slide into the lower groove a. After assembly, the lower ball end surface of the drive shaft 4 is in contact with the bottom surface plane 33 of the lower groove a, and at the same time, the rounded portion E of the transition between the lower ball end surface of the drive shaft 4 and the outer diameter portion thereof is in contact with the bottom portion of the tapered surface 31 of the lower groove a.

Thus, the utility model discloses design the upper groove B of axle sleeve 62 for the combination form of toper horn mouth 63 and face of cylinder counter bore 64, design the lower groove A of eccentric wheel 3 for the combination form of conical surface 31, face of cylinder 32 and plane 33, avoided 4 both ends of transmission shaft tops to die the risk that causes load current to rise, to eccentric wheel 3 also reduce simultaneously with the equipment control accuracy requirement of impressing of motor output shaft.

The utility model discloses transmission shaft 4's preferred design is, and transmission shaft 4 is stainless steel material, and support frame 5 is high temperature resistant plastics material, if contain fine PPA, PA, PC of glass, and transmission shaft 4's middle section position is fixed together through integrative moulding plastics with support frame 5. As shown in fig. 14, a groove section 41 with a D-shaped section is further arranged at the middle section of the transmission shaft 4, and when the transmission shaft 4 and the support frame 5 are integrally injection-molded, the D-shaped groove section 41 is completely coated by an injection molding body, so that not only is the torque in the circumferential direction enhanced, but also the shear strength in the axial direction is enhanced, the holding force between the support frame 5 and the transmission shaft 4 which move under a high load for a long time is greatly improved, and the reliability of a high load and a long service life is further realized; and the transmission shaft 4 adopts a D-shaped groove section 41, so that the cost is low, and mass production can be realized. The middle section of the transmission shaft 4 may also be provided with straight knurling 42 (as shown in fig. 15), cross-hatched knurling or a keyway 43 (as shown in fig. 16), and the middle section is completely covered by the injection molded body. The holding force of the transmission shaft in the form of the D-shaped groove and the key groove with the support frame 5 after molding is far greater than that of the knurling shaft, as shown in the following table.

As shown in fig. 13, the central axis of the transmission shaft 4 and the longitudinal axis (the central axis of the motor 1) form an included angle α, considering that if the included angle α is too large, the stroke is large, and the structure is difficult to realize, and if the included angle α is too small, the space efficiency of air pump inflation is low, and therefore, the ideal angle range of α is 11-15 °.

It should be noted that the transmission device of the present invention can be applied not only to the vertical eccentric rotary diaphragm pump shown in fig. 9 to 12, but also to the vertical eccentric rotary diaphragm pump shown in fig. 1 or the vertical eccentric rotary diaphragm pump of other structures, so as to replace the transmission device therein, and meet the requirement of long-term use under high load.

As shown in fig. 9 to 12, the present invention is applied to a vertical eccentric rotary diaphragm pump, a motor 1 and a base 2 are locked and assembled together by screws, a motor output shaft is pressed into an eccentric wheel 3, a middle section of a transmission shaft 4 is integrally injection-molded with a support frame 5, a lower end ball head surface of the transmission shaft 4 contacts with a lower groove a of the eccentric wheel 3, an upper end of the transmission shaft 4 contacts with an inner diameter portion of a conical bell mouth 63 of a shaft sleeve 62, the shaft sleeve 62 is sleeved at a central position of a bag seat 6, a bag body 7 is sleeved in a bag body cavity from above the bag seat 6, a lower clamping ball 71 of the bag body 7 passes through a pull foot hole 51 of the support frame 5 to be clamped and fixed, umbrella-shaped check valve plates 91 with clamping balls are installed on a plurality of umbrella seats of a valve seat 9, flat check valve plates 92 are installed on an upper portion of the valve seat 9, the umbrella-shaped check valve plates 91 and the flat check valve, the disk seat 9 after the butt fusion is accomplished is buckled on bag seat 6 with 8 subassemblies on, oppresses utricule 7, gets up the jump ring groove lock in every corner of base 2 and top cap 8 through a plurality of jump rings 21 at last, fastens whole pump body. So, the application the utility model discloses behind the transmission, be fit for the long-time use of high load, ensure that the transmission is normal, effective.

The above description is only the specific embodiments of the present invention, and is not intended to limit the scope of the present invention. It should be noted that after reading this description, those skilled in the art can make equivalent changes according to the design concept of the present application, which fall within the protection scope of the present application.

Claims (10)

1. Vertical eccentric rotatory diaphragm pump's long-life transmission of high load, its characterized in that: comprises an eccentric wheel, a transmission shaft, a supporting frame and a capsule seat, wherein the eccentric wheel is arranged on a motor output shaft for providing working power for the diaphragm pump, the motor output shaft is positioned on the longitudinal axis of the diaphragm pump, a lower groove is formed at the eccentric position of the eccentric wheel, the lower end of the transmission shaft is inserted into the lower groove of the eccentric wheel, the lower end of the transmission shaft is contacted with the lower groove and the eccentric wheel drives the transmission shaft to rotate, the middle section part of the transmission shaft is fixed in the support frame and drives the support frame to rotate along with the transmission shaft, the capsule seat for mounting the capsule body forms a central hole at the central position, the central line of the central hole is positioned on the longitudinal axis of the diaphragm pump, the shaft sleeve and the capsule seat are formed in a split way, the shaft sleeve is fixedly mounted in the central hole of the capsule seat, the center of the shaft sleeve forms an upper groove, the upper end of the transmission shaft is inserted in the upper groove of the shaft sleeve, and the upper end of the transmission shaft is contacted with the upper groove of the shaft sleeve and is supported by the inner wall of the upper groove to rotate.

2. A high load long life drive of a vertical eccentric rotary diaphragm pump as claimed in claim 1 wherein: the novel capsule comprises a capsule seat, a shaft sleeve, a capsule seat and a capsule seat, wherein the shaft sleeve is made of self-lubricating wear-resistant plastic materials, the capsule seat is made of high-temperature-resistant high-strength plastic materials, the shaft sleeve and the capsule seat are in split injection molding, and the shaft sleeve is pressed into a center hole of the capsule seat in an interference fit mode.

3. A high load long life drive of a vertical eccentric rotary diaphragm pump as claimed in claim 1 wherein: the upper end of the shaft sleeve is closed, the lower end of the shaft sleeve forms an upper groove, the upper groove is provided with a conical bell mouth, and the upper end of the transmission shaft is in contact with the inner wall of the conical bell mouth of the shaft sleeve.

4. A high load long life drive of a vertical eccentric rotary diaphragm pump as claimed in claim 1 wherein: the upper groove of the shaft sleeve is in the shape: the mouth part is a conical horn mouth, the bottom part is a cylindrical surface counter bore, and the inclined plane angle of the conical horn mouth is larger than the inclination angle of the transmission shaft.

5. A high load long life drive of a vertical eccentric rotary diaphragm pump according to claim 4, wherein: the upper end outer diameter part of the transmission shaft is contacted with the cylindrical surface counter bore of the shaft sleeve and the cambered surface at the transition part of the conical horn mouth, and the upper end ball head surface of the transmission shaft crosses the cambered surface and extends into the cylindrical surface counter bore; the depth of the cylindrical surface counter bore is enough to ensure that the upper end ball head surface of the transmission shaft is not contacted with the bottom surface of the cylindrical surface counter bore.

6. A high load long life drive of a vertical eccentric rotary diaphragm pump as claimed in claim 1 wherein: the inner diameter of the central hole of the capsule seat is in a shape of being large at the top and small at the bottom, a step is arranged in the middle, the outer diameter of the shaft sleeve is also in a shape of being large at the top and small at the bottom, a convex wall is arranged on the step, the outer wall of the convex wall is in interference fit with the inner wall of the upper part of the central hole, and the shaft sleeve is fixedly arranged in the central hole of the capsule seat from top to bottom.

7. A high load long life drive of a vertical eccentric rotary diaphragm pump as claimed in claim 1 wherein: the shape of the lower groove of the eccentric wheel is as follows: one half of the groove wall close to the eccentric wheel shaft is a conical surface, the other half of the groove wall far away from the eccentric wheel shaft is a cylindrical surface, the bottom surface of the lower groove is a plane, the lower end ball head surface of the transmission shaft is in contact with the bottom surface of the lower groove, and the round corner part of the transition of the lower end ball head surface of the transmission shaft and the outer diameter part of the transmission shaft is in contact with the bottom of the conical surface of the lower groove.

8. A high load long life drive of a vertical eccentric rotary diaphragm pump according to claim 7, wherein: the central axis of the transmission shaft and the side wall of the conical surface of the lower groove of the eccentric wheel form an included angle beta of 1-5 degrees.

9. A high load long life drive of a vertical eccentric rotary diaphragm pump as claimed in claim 1 wherein: the transmission shaft is made of stainless steel, the support frame is made of high-temperature-resistant plastic, and the middle section of the transmission shaft and the support frame are fixed together through integral injection molding; and a groove tangent plane with a D-shaped section is arranged at the middle section of the transmission shaft.

10. A high load long life drive of a vertical eccentric rotary diaphragm pump as claimed in claim 1 wherein: the central axis of the transmission shaft and the longitudinal axis form an included angle alpha, and the angle range of the alpha is 11-15 degrees.

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