Rear end cover and casing structure of synchronous motor

Abstract

The utility model relates to a synchronous motor rear end cover and casing structure, and relates to the technical field of motor production. The motor comprises a front end cover, a rear end cover and a machine shell, the rear end cover and the machine shell are integrally formed into a mounting shell, an annular groove is formed in the connecting position of the front end cover and the mounting shell, a pressing piece is inserted in the annular groove, a plurality of bolts are arranged on the pressing piece in a penetrating mode, the bolts are in threaded connection with the mounting shell, and the bolts are used for fixing the pressing piece in the annular groove. The motor has the advantages that the connection between the rear end cover and the casing does not have errors, and the service life of the whole motor is prolonged.

Description

Technical Field

[0001] The present application relates to the field of motor production, and in particular to a rear end cover and casing structure of a synchronous motor. Background Art

[0002] Currently, synchronous motors typically use a split rear cover and housing design. This design facilitates manufacturing and maintenance, but this split design can lead to assembly errors, making the joints potential failure points and shortening the motor's overall service life. Therefore, there is room for improvement. Utility Model Content

[0003] In order to improve the problem that errors are easily generated at the connection between the rear end cover and the casing, which affects the overall service life of the motor, the present application provides a synchronous motor rear end cover and casing structure.

[0004] The present application provides a synchronous motor rear end cover and housing structure adopting the following technical solutions:

[0005] A rear end cover and casing structure of a synchronous motor includes a front end cover, a rear end cover and a casing. The rear end cover and the casing are integrally formed into a mounting shell. An annular groove is formed at the connection between the front end cover and the mounting shell. A pressing piece is inserted into the annular groove. A plurality of bolts are passed through the pressing piece. The bolts are threadedly connected to the mounting shell. The bolts are used to fix the pressing piece in the annular groove.

[0006] By adopting the above technical solution, since the rear end cover and the housing are integrally formed as a whole, there will be no installation errors, thereby ensuring that the overall service life of the motor is not affected. During installation, the mounting shell and the front end cover are first spliced ​​together, and then the pressing piece is placed in the ring groove. Bolts are passed through the pressing piece and threadedly connected to the mounting shell, thereby pressing the pressing piece against the inner wall of the ring groove to achieve fixation in the ring groove. The front end cover is restricted by the pressing piece and cannot move away from the mounting shell, thereby achieving a fixed connection between the front end cover and the mounting shell.

[0007] Optionally, a fixing ring is provided in the annular groove, and the fixing ring is used to restrict the pressing piece in the annular groove.

[0008] By adopting the above technical solution, after the pressing piece is fixed in the annular groove, the fixing ring is placed in the annular groove to seal the pressing piece, thereby ensuring the airtightness of the connection between the front cover and the mounting shell.

[0009] Optionally, a plurality of mounting holes are provided on a side of the fixing ring close to the bolts, and the plurality of mounting holes correspond to the bolts one-to-one, and the bolts are inserted into the mounting holes.

[0010] By adopting the above technical solution, when the fixing ring is inserted into the annular groove, the mounting hole is aligned with the bolt, so that the bolt is relatively inserted into the mounting hole. The cooperation between the bolt and the mounting hole prevents the fixing ring from moving in the annular groove, thereby realizing the positioning installation of the fixing ring.

[0011] Optionally, a magnet is provided on the inner wall of the mounting hole, and the magnet can be attracted to the bolt.

[0012] By adopting the above technical solution, the mounting hole is more easily aligned with the bolt through the attraction of the magnet, thereby facilitating the positioning and installation of the fixing ring.

[0013] Optionally, a serrated bar is provided on the side wall of the fixing ring, a serrated groove is provided on the inner wall of the annular groove, and the serrated bar is adapted to be inserted into the serrated groove.

[0014] By adopting the above technical solution, when the fixing ring is inserted into the annular groove, the serrated bar is aligned with the serrated groove and inserted, so that the connection between the fixing ring and the annular groove is more tortuous. Compared with the smooth connection, the gas flow path is increased. At the same time, the continuously curved path can also play a resisting role, making it difficult for gas to pass through, thereby increasing the air tightness of the connection between the front cover and the mounting shell.

[0015] Optionally, a receiving hole is provided in the fixing ring, and a push spring is provided in the receiving hole, and the push spring is used to push the serrated bar into the serrated groove.

[0016] By adopting the above technical solution, the push spring applies a push force to the inner wall of the accommodating hole, thereby pressing the serrated bar tightly into the serrated groove, that is, there will be no gap between the serrated bar and the serrated groove, thereby increasing the tightness between the serrated bar and the serrated groove, thereby further increasing the air tightness of the fixing ring.

[0017] Optionally, a positioning block is fixed on the pressing plate, a fixing hole is provided on the side wall of the positioning block, a fixing block is inserted into the fixing hole, the fixing block is connected to the inner wall of the fixing hole through a fixing spring, a positioning hole for inserting the positioning block is provided on the side of the fixing ring close to the pressing block, and a limiting hole for inserting the fixing block is provided on the inner wall of the positioning hole.

[0018] By adopting the above technical solution, when the fixing ring is inserted into the ring groove, the fixing block is first pressed into the fixing hole, and the fixing spring is compressed so that there is no protrusion on the side wall of the positioning block, which is convenient for the positioning block to be relatively inserted into the positioning hole. Then the fixing block will be aligned with the limiting hole, and the fixing spring will restore its deformation, pushing the fixing block out of the fixing hole and inserting it into the limiting hole. At this time, the fixing block cooperates with the limiting hole, so that the fixing ring cannot move in the direction away from the pressing sheet, that is, the fixing ring cannot be pulled out of the ring groove, which increases the stability of the fixing ring installed in the ring groove.

[0019] Optionally, a guide surface is provided on a side of the fixing block away from the pressing sheet, and an end of the guide surface away from the positioning block is inclined toward a direction close to the pressing sheet.

[0020] By adopting the above technical solution, when the positioning hole is aligned with the positioning block and inserted, the fixing ring first contacts the guide surface and applies pressure to the guide surface in the direction of moving toward the pressing plate. At this time, the guide surface acts as a guide, causing the fixing ring to slide relative to the guide surface, thereby causing the fixing block to squeeze the fixing spring and be accommodated in the fixing hole, thereby facilitating the insertion of the positioning block into the positioning hole. When the fixing block is aligned with the limiting hole, the fixing spring pushes the fixing block into the limiting hole, achieving the fixed installation of the fixing ring in the ring groove.

[0021] In summary, this application has at least one of the following beneficial effects:

[0022] 1. Because the rear cover and the housing are integrally formed, there will be no installation errors, thus ensuring that the overall service life of the motor is not affected. During installation, first assemble the mounting shell and the front cover together, then place the pressing piece in the ring groove, and use bolts to pass through the pressing piece and connect it to the mounting shell through threads, so that the pressing piece is pressed against the inner wall of the ring groove, thus fixing the pressing piece in the ring groove. The front cover cannot move away from the mounting shell due to the restriction of the pressing piece, thus achieving a fixed connection between the front cover and the mounting shell;

[0023] 2. After the pressing piece is fixed in the ring groove, the fixing ring is placed in the ring groove to seal the pressing piece and ensure the airtightness of the connection between the front cover and the mounting shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the rear end cover and housing structure of the synchronous motor according to an embodiment of the present application;

[0025] Figure 2 This is a cross-sectional view of the rear end cover and housing structure of the synchronous motor according to an embodiment of the present application;

[0026] Figure 3 for Figure 2 Enlarged view of point A in the middle.

[0027] In the figure: 10, front cover; 20, mounting shell; 21, rear cover; 22, housing; 30, ring groove; 31, serrated groove; 40, pressing piece; 50, bolt; 60, fixing ring; 61, serrated bar; 62, mounting hole; 621, magnet; 63, receiving hole; 64, positioning hole; 65, limiting hole; 70, push spring; 80, positioning block; 81, fixing hole; 90, fixing block; 91, guide surface; 92, fixing spring. DETAILED DESCRIPTION

[0028] The following is combined with Figure 1-3This application is described in further detail.

[0029] The embodiment of the present application discloses a synchronous motor rear end cover and housing structure. Figure 1 and Figure 2 The rear end cover 21 and the housing 22 of the synchronous motor include a front end cover 10 and a mounting shell 20, wherein the mounting shell 20 includes the rear end cover 21 and the housing 22, and the rear end cover 21 and the housing 22 are integrally formed. The front end cover 10 and the mounting shell 20 are spliced ​​together to form a complete motor housing. Figure 2 and Figure 3 A ring groove 30 is formed at the connection between the front end cover 10 and the mounting shell 20, and a pressing piece 40 is inserted in the ring groove 30. The rock piece is annular and is adapted to cover the entire bottom wall of the ring groove 30. A plurality of bolts 50 are passed through the pressing piece 40. The bolts 50 are threadedly connected to the mounting shell 20. The bolts 50 are used to fix the pressing piece 40 in the ring groove 30.

[0030] Because the rear end cover 21 and the housing 22 are integrally formed, they form a single unit and are therefore free of installation errors, thereby ensuring that the overall service life of the motor is not affected. During installation, the mounting shell 20 and the front end cover 10 are first joined together, and then the pressing piece 40 is placed in the annular groove 30. Bolts 50 are passed through the pressing piece 40 and threadedly connected to the mounting shell 20, thereby pressing the pressing piece 40 against the inner wall of the annular groove 30, thereby securing the pressing piece 40 in the annular groove 30. The front end cover 10, restricted by the pressing piece 40, cannot move away from the mounting shell 20, thereby achieving a fixed connection between the front end cover 10 and the mounting shell 20.

[0031] Reference Figure 2 and Figure 3 A fixing ring 60 is inserted into the annular groove 30 and covers the pressing plate 40. A plurality of mounting holes 62 are formed on the side of the fixing ring 60 close to the pressing plate 40. The mounting holes 62 correspond to the bolts 50 one by one, and the bolts 50 are inserted into the mounting holes 62. A magnet 621 is provided on the inner wall of the mounting hole 62, and the magnet 621 can attract the bolt 50.

[0032] After the pressing piece 40 is fixed in the annular groove 30, the fixing ring 60 is placed in the annular groove 30. The magnet 621 attracts the mounting hole 62, which makes it easier to align the bolt 50, so that the bolt 50 is relatively inserted into the mounting hole 62. The bolt 50 cooperates with the mounting hole 62 to prevent the fixing ring 60 from moving in the annular groove 30, thus achieving the installation of the fixing ring 60 in the annular groove 30. At the same time, the fixing ring 60 covers the pressing piece 40, ensuring the airtightness of the connection between the front cover 10 and the mounting shell 20.

[0033] Reference Figure 2 and Figure 3To further improve the airtightness of the fixing ring 60, a serrated strip 61 is formed on the peripheral side wall of the fixing ring 60. The inner wall of the annular groove 30 is provided with a serrated groove 31, and the serrated strip 61 is adapted to be inserted into the serrated groove 31. A receiving hole 63 is provided in the fixing ring 60, and a push spring 70 is installed in the receiving hole 63.

[0034] When the fixing ring 60 is inserted into the annular groove 30, the serrated bar 61 is aligned with the serrated groove 31 and inserted, and the push spring 70 applies a push force to the inner wall of the accommodating hole 63, thereby pressing the serrated bar 61 tightly into the serrated groove 31, that is, there will be no gap between the serrated bar 61 and the serrated groove 31, which increases the tightness between the serrated bar 61 and the serrated groove 31, making it difficult for gas to pass through the connection between the fixing ring 60 and the annular groove 30. At the same time, the connection between the fixing ring 60 and the annular groove 30 is relatively tortuous, which increases the gas flow path compared to the smooth connection. At the same time, the continuously bending path can also play a resistance role, making it difficult for gas to pass through, thereby increasing the air tightness of the connection between the front end cover 10 and the mounting shell 20.

[0035] Reference Figure 2 and Figure 3 A positioning block 80 is fixed to the pressing plate 40. A fixing hole 81 is defined on the side wall of the positioning block 80. A fixing block 90 is inserted into the fixing hole 81. A fixing spring 92 is disposed in the fixing hole 81. One end of the fixing spring 92 is fixed to the fixing block 90, and the other end is fixed to the fixing hole 81. A guide surface 91 is provided on the side of the fixing block 90 away from the pressing plate 40. The end of the guide surface 91 away from the positioning block 80 is inclined toward the direction of approaching the pressing plate 40.

[0036] Reference Figure 2 and Figure 3 A positioning hole 64 is formed on the side of the fixing ring 60 near the pressing block, and a limiting hole 65 is formed on the inner wall of the positioning hole 64. When the positioning hole 64 is aligned with the positioning block 80 and inserted, the fixing ring 60 first abuts against the guide surface 91 and applies pressure to the guide surface 91 toward the pressing plate 40. At this time, the guide surface 91 acts as a guide, allowing the fixing ring 60 to slide relative to the guide surface 91, thereby causing the fixing block 90 to squeeze the fixing spring 92 and be accommodated in the fixing hole 81, thereby facilitating the insertion of the positioning block 80 into the positioning hole 64. When the fixing block 90 is aligned with the limiting hole 65, the fixing spring 92 pushes the fixing block 90 into the limiting hole 65, thereby achieving the fixed installation of the fixing ring 60 in the annular groove 30.

[0037] The implementation principle of the structure of the rear end cover 21 and the housing 22 of a synchronous motor in the embodiment of the present application is as follows: because the rear end cover 21 and the housing 22 are integrally formed and form a whole, there will be no installation errors, thereby ensuring that the overall service life of the motor is not affected. During installation, the mounting shell 20 and the front end cover 10 are first spliced ​​together, and then the pressing piece 40 is placed in the annular groove 30. The bolt 50 is passed through the pressing piece 40 and threadedly connected to the mounting shell 20, thereby pressing the pressing piece 40 against the inner wall of the annular groove 30 to achieve the fixing of the pressing piece 40 in the annular groove 30. The front end cover 10 cannot move away from the mounting shell 20 due to the restriction of the pressing piece 40, thereby achieving a fixed connection between the front end cover 10 and the mounting shell 20.

[0038] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A synchronous motor rear end cover and housing structure, characterized in that: The invention comprises a front end cover (10), a rear end cover (21) and a housing (22), wherein the rear end cover (21) and the housing (22) are integrally formed into a mounting housing (20), an annular groove (30) is formed at the connection between the front end cover (10) and the mounting housing (20), a pressing piece (40) is inserted into the annular groove (30), a plurality of bolts (50) are passed through the pressing piece (40), the bolts (50) are threadedly connected to the mounting housing (20), and the bolts (50) are used to fix the pressing piece (40) in the annular groove (30).

2. The synchronous motor rear end cover and housing structure according to claim 1, characterized in that: A fixing ring (60) is provided in the annular groove (30), and the fixing ring (60) is used to restrict the pressing sheet (40) in the annular groove (30).

3. The synchronous motor rear end cover and housing structure according to claim 2, characterized in that: A plurality of mounting holes (62) are provided on one side of the fixing ring (60) close to the bolt (50), and the plurality of mounting holes (62) correspond to the bolts (50) one by one, and the bolts (50) are inserted into the mounting holes (62).

4. The synchronous motor rear end cover and housing structure according to claim 3, characterized in that: A magnet (621) is provided on the inner wall of the mounting hole (62), and the magnet (621) can be attracted to the bolt (50).

5. The synchronous motor rear end cover and housing structure according to claim 2, characterized in that: A sawtooth bar (61) is provided on the side wall of the fixing ring (60), a sawtooth groove (31) is provided on the inner wall of the annular groove (30), and the sawtooth bar (61) is adapted to be inserted into the sawtooth groove (31).

6. The synchronous motor rear end cover and housing structure according to claim 5, characterized in that: A receiving hole (63) is provided in the fixing ring (60), and a push spring (70) is provided in the receiving hole (63). The push spring (70) is used to push the sawtooth bar (61) into the sawtooth groove (31).

7. The synchronous motor rear end cover and housing structure according to claim 2, characterized in that: A positioning block (80) is fixed on the pressing plate (40), a fixing hole (81) is provided on the side wall of the positioning block (80), a fixing block (90) is inserted into the fixing hole (81), and the fixing block (90) is connected to the inner wall of the fixing hole (81) through a fixing spring (92), a positioning hole (64) for inserting the positioning block (80) is provided on the side of the fixing ring (60) close to the pressing block, and a limiting hole (65) for inserting the fixing block (90) is provided on the inner wall of the positioning hole (64).

8. The synchronous motor rear end cover and housing structure according to claim 7, characterized in that: A guide surface (91) is provided on the side of the fixing block (90) away from the pressing sheet (40), and the end of the guide surface (91) away from the positioning block (80) is inclined in a direction close to the pressing sheet (40).

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