Magnetic drive pump center shaft fixing structure

Abstract

The utility model relates to the technical field of magnetic drive pumps, and discloses a fixing structure for a central shaft of a magnetic drive pump. The rear cover assembly is arranged in the first inner cavity and comprises a rear cover part, the rear cover part is provided with a second inner cavity, the center of the bottom of the rear cover part is provided with a thickening part, and the thickening part comprises a thickening shaft hole; and the bottom of the central shaft is connected into the thickened shaft hole. The bottom of the center shaft and the thickened part of the rear cover assembly are integrally formed during injection molding, so that the bottom of the center shaft is fixed to a thickened shaft hole of the thickened part of the rear cover assembly, the whole rear cover assembly is fixed to the first inner cavity of the shell assembly, and connection of the bottom of the center shaft is thickened through the thickened part, so that only the bottom of the center shaft needs to be fixed; compared with the prior art, the top of the center shaft does not need to be fixed through a tripod, the whole structure is simpler, and liquid conveying efficiency is stable.

Description

Technical Field

[0001] This utility model relates to the field of magnetic pump technology, and in particular to a magnetic pump central shaft fixing structure. Background Technology

[0002] Magnetic drive pumps are leak-free, seal-free centrifugal pumps widely used in industries such as chemical, pharmaceutical, electroplating, and food processing. They are particularly suitable for conveying toxic, harmful, flammable, explosive, or valuable liquids. Magnetic drive pumps use a motor to drive an outer magnetic rotor, which in turn uses magnetic force to synchronously rotate an inner magnetic rotor and impeller, thus achieving media transport. The inner and outer magnetic rotors are completely isolated by an isolation sleeve, ensuring zero media leakage.

[0003] The rotor rotates outside the central shaft of the magnetic pump, while the upper and lower ends of the central shaft are fixed to maintain its stability. The top of the central shaft is fixed by a tripod, making the entire magnetic pump structure complex and redundant. Utility Model Content

[0004] Based on the above, the purpose of this utility model is to provide a magnetic pump central shaft fixing structure that is simple in structure and provides stable liquid delivery efficiency.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] This utility model provides a magnetic pump central shaft fixing structure, including:

[0007] The outer casing assembly has a first inner cavity inside it;

[0008] A rear cover assembly is disposed within the first inner cavity, comprising a rear cover portion, the rear cover portion having a second inner cavity, and a thickened portion being disposed at the center of the bottom of the rear cover portion, the thickened portion including a thickened shaft hole;

[0009] The central shaft is connected at its bottom to the thickened shaft hole.

[0010] Preferably, the rear cover portion includes a rear cover sidewall and a rear cover bottom wall, the rear cover sidewall and the rear cover bottom wall surrounding to form the second inner cavity;

[0011] The thickened portion is located at the center of the bottom wall of the rear cover.

[0012] Preferably, the top of the thickened portion extends upward and protrudes beyond the top of the bottom wall of the rear cover;

[0013] The bottom of the thickened portion extends downward and protrudes from the bottom of the rear cover bottom wall.

[0014] Preferably, the bottom of the bottom wall of the rear cover and the outer periphery of the bottom of the thickened part are further provided with adhesive-reinforcing ribs.

[0015] Preferably, a fixing hole is provided at the center of the bottom of the first inner cavity, and the bottom of the thickened part can be inserted into the fixing hole.

[0016] Preferably, the housing assembly includes a housing side and a housing bottom, the top of the housing bottom is provided with an annular step, and the bottom of the housing side is connected to the top of the annular step.

[0017] Preferably, the bottom of the outer casing is also provided with several heat dissipation grooves.

[0018] Preferably, the housing assembly is an aluminum housing.

[0019] The beneficial effects of this utility model are as follows:

[0020] This utility model provides a magnetic pump central shaft fixing structure. The bottom of the central shaft and the thickened part of the rear cover assembly are integrally formed during injection molding, so that the bottom of the central shaft is fixed on the thickened shaft hole of the thickened part of the rear cover assembly. The entire rear cover assembly is then fixed to the first inner cavity of the outer shell assembly. By connecting the thickened part to the bottom of the central shaft, the central shaft only needs to be fixed at the bottom. Compared with the prior art, the top of the central shaft does not need to be fixed by a tripod, the whole structure is simpler, and the liquid delivery efficiency is stable. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model 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 the content of the embodiments of this utility model and these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of a magnetic pump central shaft fixing structure provided in an embodiment of the present invention;

[0023] Figure 2 This invention provides another structural schematic diagram of a magnetic pump central shaft fixing structure according to an embodiment of the present invention.

[0024] Figure 3 A schematic diagram of a magnetic pump central shaft fixing structure with the central shaft hidden, provided for an embodiment of this utility model;

[0025] Figure 4 A schematic diagram of a magnetic pump central shaft fixing structure provided for an embodiment of this utility model;

[0026] Figure 5 An exploded view of a magnetic pump central shaft fixing structure provided for an embodiment of this utility model.

[0027] In the picture:

[0028] 1. Housing assembly; 11. Housing side; 111. First inner cavity; 12. Housing bottom; 121. Heat dissipation groove; 122. Annular step; 123. Fixing hole; 2. Rear cover assembly; 21. Second inner cavity; 22. Thickened part; 221. Thickened shaft hole; 23. Rear cover side wall; 24. Rear cover bottom wall; 3. Central shaft. Detailed Implementation

[0029] To make the technical problems solved by this utility model, the technical solutions adopted, and the technical effects achieved clearer, the technical solutions of the embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0030] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" 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 based on the specific circumstances.

[0031] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0032] In the description of this embodiment, the terms "upper," "lower," "left," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0033] like Figures 1 to 5 As shown, this utility model embodiment provides a fixing structure for the central shaft 3 of a magnetic pump, including a housing assembly 1, which is preferably an aluminum shell. It has a first inner cavity 111; a rear cover assembly 2, disposed within the first inner cavity 111, which includes a rear cover portion, the rear cover portion having a second inner cavity 21, and a thickened portion 22 at the center of the bottom of the rear cover portion, the thickened portion 22 including a thickened shaft hole 221; and a central shaft 3, the bottom of which is connected to the thickened shaft hole 221. In actual use, the rotor rotates on the central shaft 3, while the stator is tightly fitted with the rear cover assembly 2.

[0034] This utility model embodiment provides a fixing structure for the central shaft 3 of a magnetic pump. The bottom of the central shaft 3 and the thickened part 22 of the rear cover assembly 2 are integrally formed during injection molding, so that the bottom of the central shaft 3 is fixed on the thickened shaft hole 221 of the thickened part 22 of the rear cover assembly 2. The entire rear cover assembly 2 is then fixed to the first inner cavity 111 of the outer shell assembly 1. By thickening the bottom of the central shaft 3 through the connection of the thickened part 22, the central shaft 3 only needs to be fixed at the bottom. Compared with the prior art, the top of the central shaft 3 does not need to be fixed by a tripod, the whole structure is simpler, and the liquid delivery efficiency is stable.

[0035] In some embodiments, such as Figures 2 to 4 As shown, the rear cover includes a rear cover sidewall 23 and a rear cover bottom wall 24, which together form the second inner cavity 21. The thickened portion 22 is disposed at the center of the rear cover bottom wall 24. The top of the thickened portion 22 extends upward and protrudes from the top of the rear cover bottom wall 24; the bottom of the thickened portion 22 extends downward and protrudes from the bottom of the rear cover bottom wall 24. Specifically, in this embodiment, the central shaft 3 is fixed to the rear cover bottom wall 24. By extending the thickened portion 22 upward and downward respectively, the thickness of the central shaft 3 fixed by the thickened portion 22 is increased, thereby ensuring the stability of the central shaft 3.

[0036] In some embodiments, such as Figure 3 and 4 As shown, the bottom of the bottom wall 24 of the rear cover and the outer periphery of the bottom of the thickened part 22 are also provided with adhesive-reinforcing ribs. Specifically, the adhesive-reinforcing ribs increase the structure on the one hand, and effectively strengthen the length of the entire structure on the other hand, so that the central shaft 3 is thickened and fixed to be longer.

[0037] In some embodiments, such as Figures 3 to 4As shown, a fixing hole 123 is provided at the center of the bottom of the first inner cavity 111, and the bottom of the thickened part 22 can be inserted into the fixing hole 123. Specifically, the fixing hole 123 is provided at the bottom of the first inner cavity 111, which serves two purposes: firstly, it is used to adapt to the connection of the back cover assembly 2; secondly, the thickened part 22 can be inserted into the fixing hole 123 to further strengthen the fixation of the central shaft 3.

[0038] In some embodiments, such as Figures 1 to 5 As shown, the housing assembly 1 includes a housing side portion 11 and a housing bottom portion 12. The top of the housing bottom portion 12 is provided with an annular step position 122, and the bottom of the housing side portion 11 is connected to the top of the annular step position 122. For better heat dissipation, a plurality of heat dissipation grooves 121 are also provided on the housing bottom portion 12.

[0039] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention. The scope of the present invention is determined by the scope of the appended claims.

Claims

1. A magnetic pump central shaft fixing structure, characterized in that, The utility model relates to a shell assembly (1) is provided with first inner chamber (111) in, rear cover assembly (2) is provided in first inner chamber (111), and it includes rear cover part, and the rear cover part is provided with second inner chamber (21), and the bottom center of rear cover part is provided with thickening (22), and thickening (22) includes thickening shaft hole (221), and the bottom of center shaft (3) is connected in thickening shaft hole (221). The rear cover part includes rear cover side wall (23) and rear cover bottom wall (24), and the rear cover side wall (23) and the rear cover bottom wall (24) surround and form the second inner chamber (21). The thickening (22) is arranged at the center of the rear cover bottom wall (24). The top of the thickening (22) extends upward and protrudes from the top of the rear cover bottom wall (24).

2. The magnetic force pump central shaft fixing structure according to claim 1, characterized in that, The bottom of the thickening (22) extends downward and protrudes from the bottom of the rear cover bottom wall (24). The bottom of the rear cover bottom wall (24) and the bottom of the thickening (22) are further provided with a rubber-removing reinforcing rib.

3. The magnetic force pump central shaft fixing structure according to claim 2, characterized in that, The bottom center of the first inner chamber (111) is provided with a fixing hole (123), and the bottom of the thickening (22) can be clamped into the fixing hole (123). The shell assembly (1) includes a shell side (11) and a shell bottom (12), and the top of the shell bottom (12) is provided with an annular step position (122), and the bottom of the shell side (11) is connected above the annular step position (122).

4. The magnetic force pump central shaft fixing structure according to claim 2, characterized in that, The shell bottom (12) is further provided with a plurality of heat dissipation grooves (121).

5. The magnetic force pump central shaft fixing structure according to claim 3, characterized in that, The shell assembly (1) is an aluminum shell.

6. The center shaft fixing structure of a magnetic drive pump according to any one of claims 1 to 5, wherein ​ 7. The magnetic force pump central shaft fixing structure according to claim 6, characterized in that, ​ 8. The center shaft fixing structure of a magnetic drive pump according to claim 1, wherein ​

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