Alternating current motor for high static pressure unit

Abstract

The utility model provides an alternating current motor for a high static pressure unit, which comprises a shell and a cover plate, a bearing sheath is arranged at the bottom of an inner cavity of the shell, a bottom bearing is mounted in the bearing sheath, and a fixing ring extends out of the open end of the bearing sheath along the radial direction of the bearing sheath; and the outer side of the fixing ring is embedded in the shell and is integrally cast and molded with the shell. A convex ring is arranged on one side, back to the bottom bearing, of the fixing ring; a groove corresponding to the convex ring is formed in one side, close to the bottom bearing, of the fixing ring, so that the thickness of the convex ring is smaller than that of the fixing ring; and the convex ring part is connected with the shell. The bearing sheath and the shell are integrally formed and cast, so that the structural stability of the bearing sheath can be remarkably improved, the production process is simplified, and the production efficiency is improved; the thickness of the fixing ring is set, so that the elasticity of the fixing ring is larger, the force for driving the deformation of the bearing sheath is concentrated on the convex ring, and the structures of other parts are kept stable.

Description

Technical Field

[0001] The utility model relates to the technical field of AC motors, in particular to an AC motor for a high static pressure unit. Background Art

[0002] A dual-axis motor consists of a housing and a cover. A bearing is mounted at the bottom of the housing's interior, and another bearing is mounted at the bottom of the cover's interior. The motors are inserted and retracted into the bearings, creating a rotating connection. Since the housing is typically a casting, the precision required for accurate bearing installation is limited. Furthermore, precision machining of the housing is both difficult and expensive.

[0003] Therefore, a bearing sleeve is installed at the bottom of the housing through a snap-fit ​​method. The traditional snap-fit ​​method involves a recessed annular groove on the bearing sleeve's peripheral wall, which snaps onto a protruding ring at the bottom of the housing. This method is not only difficult to install but also complex, requiring additional tooling and time, increasing production costs and cycle time. More importantly, this snap-fit ​​structure can easily cause the bearing sleeve to fall off when the motor vibrates during operation.

[0004] Therefore, how to overcome the above-mentioned defects has become a problem that needs to be solved urgently by those skilled in the art. Utility Model Content

[0005] In order to solve the technical problems in the background technology, the utility model discloses an AC motor for a high static pressure unit.

[0006] The utility model provides an AC motor for a high static pressure unit, comprising a housing and a cover plate, wherein a bearing sleeve is provided at the bottom of the inner cavity of the housing, the bottom bearing is installed in the bearing sleeve, and a fixing ring is extended from the open end of the bearing sleeve in the radial direction thereof;

[0007] The outer side of the fixing ring is embedded in the shell and is integrally cast with the shell.

[0008] A convex ring is provided on the side of the fixing ring facing away from the bottom bearing;

[0009] A groove corresponding to the convex ring is provided on one side of the fixing ring close to the bottom bearing, so that the thickness of the convex ring is smaller than that of the fixing ring;

[0010] The convex ring portion is connected to the housing.

[0011] The beneficial effects of the above-mentioned arrangement are: 1. By integrally molding and casting the bearing sleeve and the housing, the structural stability of the bearing sleeve can be significantly improved, and the risk of structural damage caused by improper installation or loose sleeve is reduced; 2. The one-piece casting method avoids the complicated installation steps of the traditional clamping method, simplifies the production process, and improves production efficiency; 3. Since the installation is more secure, the number of maintenance times due to sleeve falling off or damage is reduced, thereby reducing maintenance costs; 4. The one-piece bearing sleeve and housing structure is more compact, which improves the overall reliability and durability of the dual-axis motor; 5. Since the temperature is high during casting and the bearing sleeve is ductile and easy to deform, the setting of the convex ring provides space for deformation, thereby greatly reducing the deformation of the bearing at the bottom of the bearing sleeve installation, so that its structure remains stable; 6. The thickness setting of the fixing ring makes the fixing ring more elastic, so that the force driving the deformation of the bearing sleeve is concentrated on the convex ring, thereby maintaining the structural stability of other parts.

[0012] To further improve the installation accuracy of the bottom bearing, a further design is to install a bottom washer between the bottom of the bearing sleeve and the bottom bearing. The bottom washer fits snugly against the outer ring of the bottom bearing. The bottom washer also adjusts the axial position of the bottom bearing, thereby improving the relative position accuracy of the bottom bearing and the rotating shaft.

[0013] In order to improve the installation accuracy of the cover plate and the shell, a further design is: a raised positioning ring is provided at the open end of the shell; and the cover plate is provided with an annular positioning groove for clamping the positioning ring.

[0014] The cover plate and the shell are fixed by bolts. Its conventional structure is: threaded holes are drilled on the shell, and the bolts pass through the cover plate and are threadedly connected to the shell. Since the shell is a casting, the strength and stability of the threaded holes are low, and thread slippage is prone to occur. Based on this, further improvements are: a screw sleeve is embedded in the positioning ring, and the screw sleeve is provided with a threaded hole; the bolt passes through the bottom of the positioning groove and is threadedly connected to the screw sleeve.

[0015] In order to improve the connection strength between the screw sleeve and the shell, a further design is that the screw sleeve and the shell are cast as one piece.

[0016] The screw sleeve is generally a standard cylindrical shape, but it is easy to separate from the shell under high tension. Based on this, a further improvement is to set an annular groove in the middle of the screw sleeve to engage with the shell. This arrangement forms a snap ring at the groove during casting, thus preventing the screw sleeve from falling off.

[0017] A head bearing is installed in the cover plate. In order to improve the installation accuracy of the head bearing, a further design is: a head gasket and a head bearing are installed in sequence at the bottom of the cover plate cavity; the head gasket is connected to the outer ring of the head bearing.

[0018] The beneficial effects of the above-mentioned arrangement are: 1. By integrally molding and casting the bearing sleeve and the housing, the structural stability of the bearing sleeve can be significantly improved, and the risk of structural damage caused by improper installation or loose sleeve is reduced; 2. The one-piece casting method avoids the complicated installation steps of the traditional clamping method, simplifies the production process, and improves production efficiency; 3. Since the installation is more secure, the number of maintenance times due to sleeve falling off or damage is reduced, thereby reducing maintenance costs; 4. The one-piece bearing sleeve and housing structure is more compact, which improves the overall reliability and durability of the dual-axis motor; 5. Since the temperature is high during casting and the bearing sleeve is ductile and easy to deform, the setting of the convex ring provides space for deformation, thereby greatly reducing the deformation of the bearing at the bottom of the bearing sleeve installation, so that its structure remains stable; 6. The thickness setting of the fixing ring makes the fixing ring more elastic, so that the force driving the deformation of the bearing sleeve is concentrated on the convex ring, thereby maintaining the structural stability of other parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0020] Figure 1 It is a structural diagram of the utility model;

[0021] Figure 2 yes Figure 1 Enlarged view of point A in the middle;

[0022] Figure 3 yes Figure 1 Enlarged view of point B in the middle;

[0023] In the figure: 1. Shell; 2. Cover plate; 3. Bearing sleeve; 4. Bottom bearing; 5. Fixing ring; 6. Protruding ring; 7. Groove; 8. Positioning ring; 9. Positioning groove; 10. Screw sleeve; 11. Slot; 12. Head bearing; 13. Head gasket; 14. Bottom gasket. DETAILED DESCRIPTION

[0024] The present invention will now be described in further detail with reference to the accompanying drawings, which are simplified schematic diagrams that illustrate the basic structure of the present invention in a schematic manner.

[0025] like Figure 1 As shown, the utility model discloses an AC motor for a high static pressure unit, comprising a housing 1 and a cover plate 2, which are fixed by bolts.

[0026] The open end of the housing 1 is provided with a raised positioning ring 8; the cover plate 2 is provided with an annular positioning groove 9 for clamping the positioning ring 8. Since the threaded hole is drilled on the housing 1, the strength and stability of the threaded hole are low under the influence of the housing 1 being a casting, and it is easy to slip the thread. Therefore, the following design is made: Figure 2 As shown, a screw sleeve 10 is embedded in the positioning ring 8. In this embodiment, the screw sleeve 10 is made of 45# steel. The screw sleeve 10 is provided with a threaded hole; a bolt passes through the bottom of the positioning groove 9 and is threadedly connected to the screw sleeve 10.

[0027] In order to improve the connection strength between the screw sleeve 10 and the housing 1, the screw sleeve 10 and the housing 1 are cast as one piece.

[0028] Since the screw sleeve 10 is generally a standard cylindrical shape, it is still easy to separate from the housing 1 under strong pulling force. Therefore, an annular retaining groove 11 is provided in the middle of the screw sleeve 10 to engage with the housing 1. With this arrangement, during casting, the housing 1 forms a retaining ring at the retaining groove 11, thereby preventing the screw sleeve 10 from falling off. In other embodiments, an annular protrusion can be provided in the middle of the screw sleeve 10 instead of the retaining groove 11 to achieve the same effect.

[0029] A head bearing 12 is mounted within the cover plate 2. To improve the installation accuracy of the head bearing 12, the following design is employed: a head washer 13 and the head bearing 12 are sequentially mounted at the bottom of the inner cavity of the cover plate 2; the head washer 13 is connected to the outer ring of the head bearing 12. The head washer 13 also adjusts the axial position of the head bearing 12, thereby improving the relative position accuracy between the head bearing 12 and the rotating shaft.

[0030] A bearing sleeve 3 is provided at the bottom of the inner cavity of the housing 1 , and a bottom bearing 4 is installed in the bearing sleeve 3 .

[0031] The bearing sleeve 3 is in the shape of a cylinder with one end open, and a through hole is provided at the center of the bottom for the shaft to pass through. A fixing ring 5 extends radially from the open end of the bearing sleeve 3, and the outer side of the fixing ring 5 is embedded in the shell 1 and cast integrally with the shell 1. The effects are: 1. By integrally casting the bearing sleeve 3 and the shell 1, the structural stability of the bearing sleeve 3 can be significantly improved, and the risk of structural damage caused by improper installation or loosening of the sleeve is reduced; 2. The integral casting method avoids the complicated installation steps of the traditional clip-on method, simplifies the production process, and improves production efficiency; 3. Since the installation is more secure, the number of maintenance times due to the sheath falling off or damage is reduced, thereby reducing maintenance costs; 4. The integrally formed bearing sleeve 3 and the shell 1 are more compact in structure, which improves the overall reliability and durability of the dual-axis motor.

[0032] like Figure 3As shown, a protruding ring 6 is provided on the side of the retaining ring 5 facing away from the bottom bearing 4; a groove 7 corresponding to the protruding ring 6 is provided on the side of the retaining ring 5 close to the bottom bearing 4, and the thickness of the protruding ring 6 is smaller than that of the retaining ring 5. Because the casting temperature is high and the bearing sleeve 3 is ductile and easily deformed, the provision of the protruding ring 6 provides space for deformation, thereby greatly reducing the deformation of the bearing sleeve 3 where it is mounted on the bottom bearing 4 and maintaining its structural stability. In addition, the thickness of the retaining ring 5 increases its elasticity, so that the force driving the deformation of the bearing sleeve 3 is concentrated on the protruding ring 6, thereby maintaining the structural stability of other parts.

[0033] The outer portion of the convex ring 6 is connected to the housing 1, and the groove 7 and the housing 1 form a cavity. This arrangement not only provides sufficient deformation space for the convex ring 6, but also fixes the outer side of the convex ring 6, so that the convex ring 6 can be deformed in a directional manner without distortion.

[0034] To further improve the installation accuracy of the bottom bearing 4, the following design is made: a bottom washer is installed at the bottom of the bearing sleeve 3, and the bottom washer fits tightly against the outer ring of the bottom bearing 4. The bottom washer is also used to adjust the axial position of the bottom bearing 4, thereby improving the relative position accuracy of the bottom bearing 4 and the rotating shaft.

[0035] Based on the above-mentioned ideal embodiment of the present invention, and in accordance with the above description, relevant personnel can make various changes and modifications without departing from the technical scope of the present invention. The technical scope of the present invention is not limited to the content of the specification, but must be determined according to the scope of the claims.

Claims

1. An AC motor for a high static pressure unit, comprising a housing (1) and a cover plate (2), wherein a bearing sleeve (3) is provided at the bottom of the inner cavity of the housing (1), and a bottom bearing (4) is installed in the bearing sleeve (3), characterized in that: A fixing ring (5) extends radially from the open end of the bearing sleeve (3); The outer side of the fixing ring (5) is embedded in the housing (1) and is integrally cast with the housing (1); A convex ring (6) is provided on the side of the fixing ring (5) facing away from the bottom bearing (4); A groove (7) corresponding to the convex ring (6) is provided on one side of the fixing ring (5) close to the bottom bearing (4), so that the thickness of the convex ring (6) is smaller than the thickness of the fixing ring (5); The convex ring (6) is partially connected to the housing (1).

2. The AC motor for a high static pressure unit according to claim 1, characterized in that: A bottom washer (14) is installed between the bottom of the bearing sleeve (3) and the bottom bearing (4), and the bottom washer (14) is fitted with the outer ring of the bottom bearing (4).

3. The AC motor for a high static pressure unit according to claim 1, characterized in that: The open end of the housing (1) is provided with a raised positioning ring (8); The cover plate (2) is provided with an annular positioning groove (9) for clamping the positioning ring (8).

4. The AC motor for a high static pressure unit according to claim 3, characterized in that: A screw sleeve (10) is embedded in the positioning ring (8), and the screw sleeve (10) is provided with a threaded hole; The bolt passes through the bottom of the positioning groove (9) and is threadedly connected to the screw sleeve (10).

5. The AC motor for a high static pressure unit according to claim 4, characterized in that: The screw sleeve (10) and the housing (1) are integrally cast.

6. The AC motor for a high static pressure unit according to claim 5, characterized in that: An annular clamping groove (11) is provided in the middle of the screw sleeve (10) and is clamped with the housing (1).

7. The AC motor for a high static pressure unit according to claim 1, characterized in that: A head gasket (13) and a head bearing (12) are sequentially mounted on the bottom of the inner cavity of the cover plate (2); The head gasket (13) is connected to the outer ring of the head bearing (12).

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