Piston frame and piston frame assembly

Abstract

The piston frame comprises a piston frame body, a plurality of balance wheels are arranged on the piston frame body, the balance wheels are used for being connected with a piston, and the balance wheels are arranged in an annular mode. One end, close to the center of the piston frame body, of the balance wheel is cut off to form a tip portion with the narrow inside and the wide outside. The end, close to the center of the piston frame body, of the balance wheel is cut off to form the tip portion with the narrow inside and the wide outside, so that the whole balance wheel is of a structure with the narrow inside and the wide outside, more balance wheels can be arranged on the piston frame body of the same size, the characteristics that the inner circumference of the piston frame body is large and the outer circumference of the piston frame body is long are fully utilized, and the service life of the piston frame body is prolonged. The volume of the booster pump does not need to be increased while the number of the cavities of the booster pump is increased, and installation and use of the booster pump are facilitated.

Description

Technical Field

[0001] This utility model relates to the field of booster pump technology, and in particular to a piston holder and piston holder assembly. Background Technology

[0002] Currently, diaphragm booster pumps are commonly used in water purifiers. A typical booster pump head includes, from bottom to top, a piston holder, a support, a diaphragm, a piston, a diaphragm chamber, and a pump head cover. The piston is embedded within the support, and several balance wheels are mounted on the piston holder, with the piston and balance wheels fixedly connected. However, existing balance wheels are usually cylindrical and circumferentially arranged. Due to the different diameters of the inner and outer circumferences of the piston holder, conventional cylindrical balance wheels require a significant amount of space on the inner circumference of the piston holder, limiting the number of balance wheels on the piston holder to five or fewer. Increasing the number of balance wheels necessitates increasing the size of the piston holder, thus increasing the size of the booster pump and hindering its installation and use. Utility Model Content

[0003] The purpose of this utility model is to provide a piston holder and piston holder assembly to solve the technical problem that in the prior art, the balance wheel is usually a cylindrical structure and is arranged circumferentially. However, due to the different diameters of the inner and outer circumferences of the piston holder, the conventional cylindrical balance wheel needs to occupy a large space in the inner circumference of the piston holder, which means that the piston holder can usually only be equipped with no more than five balance wheels. If the number of balance wheels is to be increased, the volume of the piston holder must be increased, which leads to an increase in the volume of the booster pump and is not conducive to the installation and use of the booster pump.

[0004] This utility model provides a piston holder, including a piston holder body, on which a plurality of balance wheels are provided. The balance wheels are used to connect with the piston. The plurality of balance wheels are arranged in a ring. The end of each balance wheel near the center of the piston holder body is cut off to form a pointed part that is narrower on the inside and wider on the outside.

[0005] As described above, the piston frame has a pointed end that is a triangular structure formed by removing portions from both the left and right sides of the balance wheel, and the left side wall of each balance wheel is parallel to the right side wall of an adjacent balance wheel.

[0006] As described above, the piston holder has a curved chamfer at the tip of the tip.

[0007] As described above, the piston frame has a teardrop-shaped structure, and the angle between the left and right walls of the balance wheel ranges from 50° to 70°.

[0008] As described above, the piston carrier has a connecting hole on the top wall of the balance wheel, which is used for the piston connector to pass through so that the balance wheel is fixedly connected to the piston.

[0009] As described above, the piston holder has a first groove on the top wall of the balance wheel, a protrusion in the middle of the first groove, a connecting hole on the protrusion, and an annular groove formed between the protrusion and the side wall of the first groove. The bottom wall of the annular groove has an annular protrusion for dividing the annular groove into two.

[0010] As described above, the piston holder has a mounting groove on the bottom wall of the piston holder body for mounting a transmission structure to drive the piston holder body to swing up and down.

[0011] As described above, the piston holder has a plurality of spaced lugs on the side wall of the piston holder body, and mounting holes are provided on the bottom wall of the lugs.

[0012] As described above, the balance wheel and the piston frame body are an integral structure.

[0013] This utility model also provides a piston holder assembly, including the piston holder as described above.

[0014] The piston carrier assembly described above includes a bearing, an eccentric wheel, a bearing retaining ring, and several second screws. The bearing is installed in a mounting groove at the bottom of the piston carrier body, and the bearing retaining ring is installed on the bottom wall of the piston carrier body. The bearing retaining ring and the piston carrier body are connected by the second screws. The bearing retaining ring abuts against the bottom wall of the bearing. The bearing retaining ring is fixedly connected to the piston carrier body and can also fix the bearing in the mounting groove at the bottom of the piston carrier body, preventing the bearing from coming out of the mounting groove. The bearing has an eccentric wheel hole, and the eccentric wheel is installed in the eccentric wheel hole. The eccentric wheel has a shaft hole for inserting a motor output shaft, so that the motor output shaft can drive the eccentric wheel of the piston carrier assembly to rotate, and the eccentric wheel causes the piston carrier body and the swing wheel on it to swing up and down.

[0015] Implementing the embodiments of this utility model will have the following beneficial effects:

[0016] In this invention, the piston holder includes a piston holder body, on which several balance wheels are provided. These balance wheels are connected to the piston and are arranged in a ring. The end of each balance wheel near the center of the piston holder body is partially removed to form a pointed end that is narrower on the inside and wider on the outside. By removing the portion of the balance wheel near the center of the piston holder body to form a pointed end that is narrower on the inside and wider on the outside, the balance wheel as a whole presents a structure that is narrower on the inside and wider on the outside. This allows for more balance wheels to be installed on the same size piston holder body. By fully utilizing the characteristics of the piston holder body's long inner and outer circumferences, the number of chambers in the booster pump can be increased without increasing the pump's volume, which is beneficial for the installation and use of the booster pump. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the piston holder structure according to an exemplary embodiment;

[0019] Figure 2 This is a front sectional view of a piston carrier according to an exemplary embodiment;

[0020] Figure 3 This is a top view of a piston carrier according to an exemplary embodiment;

[0021] Figure 4 This is a schematic diagram of the piston carrier assembly according to an exemplary embodiment;

[0022] Figure 5 This is an exploded view of the piston carrier assembly according to an exemplary embodiment;

[0023] Figure 6 This is a front sectional view of a piston carrier assembly according to an exemplary embodiment.

[0024] The components are: 1. Piston holder body; 11. Connecting hole; 12. Protrusion; 13. Annular groove; 14. Annular protrusion; 15. Mounting groove; 16. Lug; 161. Mounting hole; 2. Balance wheel; 21. Tip; 3. Bearing; 4. Eccentric wheel; 5. Bearing retaining ring; 6. Second screw. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0027] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0028] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0030] In existing technologies, booster pumps typically include, from bottom to top, a piston frame, a support, a diaphragm, a piston, a diaphragm chamber, and a pump head cover. The piston is embedded in the support, and several balance wheels are mounted on the piston frame. The piston and balance wheels are fixedly connected by a connecting component. However, existing balance wheels are usually cylindrical and circumferentially arranged. Because the inner and outer diameters of the piston frame are different, conventional cylindrical balance wheels require a large space on the inner circumference of the piston frame, resulting in a maximum of five balance wheels on the piston frame. Increasing the number of balance wheels would require increasing the volume of the piston frame, thus increasing the size of the booster pump, which is detrimental to its installation and use.

[0031] See Figures 1-6This utility model provides a piston holder, including a piston holder body 1. The piston holder body 1 is provided with a plurality of balance wheels 2, which are used to connect to the piston. The plurality of balance wheels 2 are arranged in a ring. A portion of the end of each balance wheel 2 near the center of the piston holder body 1 is cut off to form a pointed portion 21 that is narrower inside and wider outside. By cutting off the portion of the end of the balance wheel 2 near the center of the piston holder body 1 to form a pointed portion 21 that is narrower inside and wider outside, the balance wheel 2 has an overall structure that is narrower inside and wider outside. More balance wheels 2 can be set on the same size piston holder body 1. This fully utilizes the characteristics of the piston holder body 1 having a long inner circumference and a long outer circumference, allowing for an increase in the number of chambers in the booster pump without increasing the volume of the booster pump, which is beneficial for the installation and use of the booster pump.

[0032] Specifically, the piston is usually connected to the diaphragm by a first screw. The first screw on the piston passes through the diaphragm and is threadedly fastened to the balance wheel 2, so that the piston, diaphragm and balance wheel 2 are fixedly connected.

[0033] Furthermore, the pointed portion 21 is a triangular structure formed by removing portions from both the left and right sides of the balance wheel 2, with the left side wall of each balance wheel 2 parallel to the right side wall of an adjacent balance wheel 2. This maximizes the use of space on the piston holder body 1, allowing for the placement of more balance wheels 2 on the piston holder body 1 to form a booster pump with more chambers.

[0034] Furthermore, the tip of the tip 21 is provided with an arc-shaped chamfer to avoid friction and collision between the sharp structure and the support, which is conducive to the stability of the balance wheel 2 structure and the service life of the balance wheel 2.

[0035] Furthermore, the balance wheel 2 has a teardrop-shaped structure, and the angle between the left and right walls of the balance wheel 2 ranges from 50° to 70°. Specifically, the piston connected to the balance wheel 2 also has a teardrop-shaped structure, and the shape and size of the balance wheel 2 and the piston are compatible. In a specific embodiment, the angle between the left and right walls of the balance wheel 2 is 60°.

[0036] Furthermore, in one specific embodiment, the number of balance wheels 2 is six, the included angle between any two adjacent balance wheels 2 is 60°, and the six balance wheels 2 cooperate with six pistons to form a six-chamber booster pump.

[0037] Furthermore, the top wall of the balance wheel 2 is provided with a connecting hole 11, which is used for the piston connector to pass through so that the balance wheel 2 is fixedly connected to the piston. Specifically, the piston connector is a first screw, with the piston inserted into the diaphragm from top to bottom, and the first screw passing through the piston and the diaphragm in sequence before connecting to the connecting hole 11. In some optional embodiments, the connecting hole 11 is a threaded hole with threads on its inner wall, and the threads in the connecting hole 11 mate with the threads on the first screw.

[0038] Furthermore, a first groove is formed on the top wall of the balance wheel 2, and a protrusion 12 is provided in the middle of the first groove. The connecting hole 11 is provided on the protrusion 12. An annular groove 13 is formed between the protrusion 12 and the side wall of the first groove. An annular protrusion 14 for dividing the annular groove 13 into two is provided on the bottom wall of the annular groove 13. Specifically, a plurality of downwardly extending protrusions are provided on the bottom wall of the diaphragm, and a second groove is provided on the bottom wall of the protrusions. The protrusions are inserted into the first groove, and the protrusion 12 is also inserted into the second groove in the protrusions. The balance wheel 2 and the diaphragm are cross-connected, making the connection between the two more stable.

[0039] Specifically, the top wall of the balance wheel 2 is flat, and the height of the protruding structure is greater than the depth of the annular groove 13, allowing for deformation and compression to ensure a sealed connection between the protruding structure and the annular groove 13. In one specific embodiment, the distance between the bottom wall of the annular groove 13 and the top wall of the balance wheel 2, i.e., the depth of the annular groove 13, is 2.5 mm, and the height of the protruding structure of the diaphragm is 3 mm. After being compressed, the protruding structure deforms, and the diaphragm is finally pressed tightly onto the balance wheel 2.

[0040] In an optional embodiment, the diaphragm is injection molded from thermoplastic rubber, making it resistant to tension and with a long service life. The protruding structure and the diaphragm body are integrally injection molded, allowing for a certain degree of deformation. When the first screw connects to the connecting hole 11, it compresses the diaphragm, and the protruding structure deforms under external force to fit tightly against the annular groove 13 and the annular protrusion 14, achieving a sealed connection between the diaphragm and the balance wheel 2. Specifically, the bottom wall of the diaphragm is provided with a coating layer, which has several clearance holes for the protruding structure to pass through. When the diaphragm is connected to the balance wheel 2, the coating layer presses against the top wall of the balance wheel 2, preventing gaps between the bottom wall of the diaphragm and the top wall of the balance wheel 2, further improving the sealing at the connection between the diaphragm and the balance wheel 2, and preventing water leakage.

[0041] Furthermore, the bottom wall of the piston frame body 1 is provided with a mounting groove 15 for mounting a transmission structure to drive the piston frame body 1 to swing up and down. The transmission structure includes a bearing 3 and an eccentric wheel 4. The motor output shaft of the booster pump is connected to the eccentric wheel 4. The bearing 3 is used to connect the eccentric wheel 4 and the piston frame body 1, so that the piston frame body 1 can drive the swing wheel 2 to swing up and down together.

[0042] Furthermore, the piston holder body 1 has a plurality of spaced lugs 16 on its side wall, and the bottom wall of each lug 16 has a mounting hole 161. There are three lugs 16, which are evenly distributed circumferentially on the piston holder body 1. The lugs 16 are staggered with the balance wheels 2, and two balance wheels 2 are arranged between every two lugs 16.

[0043] Furthermore, the balance wheel 2 and the piston frame body 1 are integrally formed. Specifically, the lower end of the balance wheel 2 is a column disposed on the outer peripheral wall of the piston frame body 1, and the upper end of the balance wheel 2 is a teardrop-shaped structure protruding from the top of the piston frame body 1. The lower end of the balance wheel 2, the upper end of the balance wheel 2, and the piston frame body 1 are all integrally formed.

[0044] Specifically, the upper end of the balance wheel 2 is provided with a hollow cavity, which allows the balance wheel 2 to undergo a certain deformation, increasing the flexibility of the balance wheel 2 and saving materials.

[0045] This utility model also provides a piston holder assembly, including a piston holder body 1. The piston holder body 1 is provided with a plurality of balance wheels 2, which are used to connect to the piston. The balance wheels 2 are arranged in a ring. One end of each balance wheel 2 near the center of the piston holder body 1 is shaved off to form a pointed portion 21 that is narrower inside and wider outside. More balance wheels 2 can be provided on the same size piston holder body 1, fully utilizing the characteristics of the piston holder body 1's long inner and outer circumferences. This allows for an increase in the number of chambers in the booster pump without increasing the pump's size, which is beneficial for the installation and use of the booster pump.

[0046] Furthermore, the piston frame assembly includes a bearing 3, an eccentric wheel 4, a bearing retaining ring 5, and several second screws 6. The bearing 3 is installed in the mounting groove 15 at the bottom of the piston frame body 1, and the bearing retaining ring 5 is installed on the bottom wall of the piston frame body 1. The bearing retaining ring 5 and the piston frame body 1 are connected by the second screws 6. The bearing retaining ring 5 abuts against the bottom wall of the bearing 3. While the bearing retaining ring 5 is fixedly connected to the piston frame body 1, it can also fix the bearing 3 to the mounting groove 15 at the bottom of the piston frame body 1, preventing the bearing 3 from coming out of the mounting groove 15. The bearing 3 is provided with an eccentric wheel hole, and the eccentric wheel 4 is installed in the eccentric wheel hole. The eccentric wheel 4 is provided with a shaft hole for inserting the motor output shaft, so that the motor output shaft can drive the eccentric wheel to rotate, and the piston frame body and the swing wheel on it swing up and down through the eccentric wheel.

[0047] Specifically, there are three second screws 6, and three lugs 16 on the piston holder body 1. Each lug 16 has a mounting hole 161 on its bottom wall. The bearing retainer 5 is fixedly connected to the piston holder body 1 by three second screws 6. The three second screws 6 are arranged in a triangular position so that the bearing retainer 5 can be firmly connected to the piston holder body 1, avoiding the vibration generated by the operation of the booster pump from causing the bearing retainer 5 to loosen.

[0048] The above embodiments are only used to illustrate the technical solution of this utility model, and are not intended to limit the scope of protection of the utility model.

Claims

1. A piston holder, characterized in that, Includes a piston frame body (1), on which a plurality of balance wheels (2) are provided. The balance wheels (2) are used to connect with the piston. The plurality of balance wheels (2) are arranged in a ring. The end of the balance wheel (2) near the center of the piston frame body (1) is cut off to form a pointed part (21) that is narrow inside and wide outside.

2. The piston holder according to claim 1, characterized in that, The tip (21) is a triangular structure formed by removing portions from both the left and right sides of the balance wheel (2), and the left side wall of each balance wheel (2) is parallel to the right side wall of an adjacent balance wheel (2).

3. The piston holder according to claim 2, characterized in that, The tip of the tip (21) is provided with an arc-shaped chamfer.

4. The piston holder according to claim 3, characterized in that, The balance wheel (2) has a teardrop-shaped structure, and the angle between the left and right sides of the balance wheel (2) is 50°-70°.

5. The piston holder according to claim 1, characterized in that, The top wall of the balance wheel (2) is provided with a connecting hole (11), which is used for the piston connector to pass through so that the balance wheel (2) is fixedly connected to the piston.

6. The piston holder according to claim 5, characterized in that, The top wall of the balance wheel (2) is provided with a first groove, and a protrusion (12) is provided in the middle of the first groove. The connecting hole (11) is provided on the protrusion (12). An annular groove (13) is formed between the protrusion (12) and the side wall of the first groove. An annular protrusion (14) for dividing the annular groove (13) into two is provided on the bottom wall of the annular groove (13).

7. The piston holder according to claim 6, characterized in that, The piston frame body (1) has a mounting groove (15) on its bottom wall for mounting a transmission structure to drive the piston frame body (1) to swing up and down.

8. The piston holder according to claim 7, characterized in that, The piston holder body (1) has a number of spaced lugs (16) on its side wall, and the bottom wall of the lugs (16) has mounting holes (161).

9. The piston holder according to claim 1, characterized in that, The balance wheel (2) and the piston frame body (1) are an integral structure.

10. A piston carrier assembly, characterized in that, Includes the piston carrier as described in any one of claims 1-9.

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