Rotor Pressing-in Guide and Positioning Device for Outer Water Jacket and Method for Pressing Rotor into Outer Water Jacket

Abstract

Rotor press-fitting outer water jacket guiding and limiting device, characterized in that: it includes a sliding column coaxially connected to the lower end of the rotor, and a limiting and guiding assembly detachably installed on the outer water jacket. The sliding column is guided and fitted into the limiting and guiding assembly as the rotor descends and sleeves into the outer water jacket. The limiting and guiding assembly contacts the lower bearing of the rotor as the rotor descends, and limits the descending height of the rotor. In the present invention, when the rotor descends and sleeves into the outer water jacket, the axial direction of the rotor is positioned through the guiding cooperation between the sliding column and the limiting and guiding assembly, ensuring that the rotor does not deflect axially during assembly, and the descending height of the rotor is limited by the contact between the limiting and guiding assembly and the lower bearing of the rotor, ensuring that the rotor is assembled to the required height in the outer water jacket, that is, ensuring that the rotor descends in place and avoiding damage to its lower bearing due to the descent of the rotor. The present invention also provides a method for pressing the rotor into the outer water jacket.

Description

Technical Field

[0001] The rotor pressing-into-outer-water-jacket guide and limit device and the rotor pressing-into-outer-water-jacket method of the present invention are used in the process of inserting the rotor into the outer water jacket of an electric motor with inner and outer water jacket structures. Background Art

[0002] In motors with internal and external water jackets, the bearings are already installed in the outer water jacket bearing chamber. One end of the bearing outer ring is supported by a wave spring (elastic component), while the other end is suspended (the rotor shaft end face contacts the bearing inner ring end face). The rotor is pressed into the outer water jacket (excessive fit between the rotor shaft and the bearing inner ring). The installation process must be non-damaging (high-precision guidance), and the bearings have axial installation position requirements. This solution provides a new precision limit guide device and method to address the needs of guiding the rotor (with bearings already installed) in the outer water jacket and limiting the axial installation position of this type of motor. Summary of the Invention

[0003] The present invention provides a guide and limiter device for pressing a rotor into an outer water jacket. When the rotor is lowered into the outer water jacket, the guide cooperation between the sliding post and the limiter guide assembly positions the rotor axially, ensuring that the rotor does not deflect axially during assembly. Furthermore, the contact between the limiter guide assembly and the rotor's lower end bearing limits the rotor's lowering height, ensuring that the rotor is assembled to the required height in the outer water jacket. This ensures that the rotor is lowered into position while preventing damage to the lower end bearing due to the rotor's lowering. The present invention also provides a method for pressing a rotor into the outer water jacket.

[0004] In order to achieve the above object, the technical solution adopted by the present invention is:

[0005] The rotor is pressed into the outer water jacket guide and limit device, which is characterized by: including a sliding column coaxially connected to the lower end of the rotor and a detachable limit guide assembly installed on the outer water jacket. The sliding column is inserted into the outer water jacket as the rotor descends and is guided and inserted into the limit guide assembly. The limit guide assembly contacts the lower end bearing of the rotor as the rotor descends, thereby limiting the descending height of the rotor.

[0006] Preferably, the limiting guide assembly includes a limiting plate positioned on the lower end surface of the outer water jacket and a limiting guide sleeve mounted on the limiting plate, and the limiting guide sleeve extends into the inner hole of the lower end of the outer water jacket with a clearance fit.

[0007] Preferably, the inner wall of the limiting guide sleeve includes an inlet wall and a guide wall coaxially arranged below the inlet wall, the diameter of the inlet wall is 1~2mm larger than the diameter of the guide wall, and a radial annular step surface is formed between the inlet wall and the guide wall, and the guide wall and the sliding column are matched with a small gap of 0.01~0.05mm.

[0008] Preferably, a second radial annular step surface is provided on the outer wall of the limit guide sleeve. The top surface of the limit guide sleeve contacts the end face of the inner ring of the lower bearing as the rotor descends, and the second annular step surface contacts the end face of the bearing seat of the lower bearing to limit the descending height of the rotor.

[0009] Preferably, the sliding column is composed of a connecting section and a guiding section. The outer diameter of the connecting section is smaller than that of the guiding section, and a third annular step surface is formed between the connecting section and the guiding section. The connecting section is in threaded fit connection with the inner hole of the rotating shaft of the rotor, and the third annular step surface abuts against the lower end face of the rotating shaft.

[0010] Preferably, the connecting section is of a solid structure, the guiding section is of a hollow tubular shape, and the connecting section is press-fitted into the guiding section with an interference fit.

[0011] A method for pressing the rotor into the outer water jacket, using the rotor pressing into the outer water jacket guiding and limiting device described above, is characterized in that the steps are as follows:

[0012] First: coaxially connect the sliding column with the lower end of the rotor.

[0013] Then, according to the installation height of the rotor in the outer water jacket, determine the installation height of the limit guiding assembly on the outer water jacket, and then install the limit guiding assembly on the outer water jacket.

[0014] Next, lift the rotor, and then align the sliding column with the outer water jacket and slowly lower it into the outer water jacket.

[0015] After that, insert the sliding column into the limit guiding assembly in a guiding fit manner, and then press down the rotor until the limit guiding assembly contacts the lower bearing, so that the rotor is pressed in place.

[0016] Preferably, "determining the installation height of the limit guiding assembly on the outer water jacket" refers to determining the height of the limit guide sleeve.

[0017] Preferably, "inserting the sliding column into the limit guiding assembly in a guiding fit manner" means: slowly lower the rotor to make the sliding column enter the guiding wall, and then adjust the position of the sliding column to make the sliding column further descend into the guiding wall, so that the sliding column is in guiding fit with the limit guide sleeve.

[0018] The beneficial effects of the present invention are:

[0019] 1. In the rotor pressing-in outer water jacket guiding and limiting device of the present invention, the sliding column is coaxially connected to the lower end of the rotor. The limiting and guiding assembly is installed on the outer water jacket. When the rotor descends and sleeves into the outer water jacket, the axial direction of the rotor is positioned through the guiding cooperation between the sliding column and the limiting and guiding assembly, ensuring that the rotor does not deflect axially during assembly. And by the contact between the limiting and guiding assembly and the lower bearing of the rotor, the descending height of the rotor is limited, ensuring that the rotor is assembled in the outer water jacket to the required height. After the rotor descends in place, the rotor is positioned in the outer water jacket, and then the sliding column is removed from the lower end of the rotor and the limiting and guiding assembly is removed from the outer water jacket, thus completing the assembly of the rotor and the outer water jacket.

[0020] 2. The inner wall of the limiting guide sleeve includes an introducing wall and a guiding wall. The introducing wall guides the entering position of the sliding column when the sliding column enters the limiting guide sleeve, ensuring that the sliding column can smoothly enter the limiting guide sleeve. The guiding wall is in small clearance fit with the sliding column to position the axial direction of the sliding column, ensuring that the sliding column does not tilt, so as to ensure that the rotor does not tilt.

[0021] 3. The top surface of the limiting guide sleeve contacts the end face of the inner ring of the lower bearing as the rotor descends, and the second annular step surface contacts the end face of the bearing seat of the lower bearing, limiting the descending height of the rotor. Through the contact of the two end faces, it not only ensures that the rotor descends in place, but also avoids damaging the lower bearing of the rotor due to the descent of the rotor. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the cooperation between the rotor pressing-in outer water jacket guiding and limiting device of the present invention, the rotor and the outer water jacket.

[0023] Figure 2 It is a schematic diagram of the structure of the limiting guide sleeve.

[0024] Figure 3 It is a schematic diagram of the structure of the sliding column. DETAILED DESCRIPTION OF THE INVENTION

[0025] The following Figures 1 to 3 will make a detailed description of the embodiments of the present invention.

[0026] The rotor pressing-in outer water jacket guiding and limiting device is characterized in that: it includes a sliding column 1 coaxially connected to the lower end of the rotor 100, and a limiting and guiding assembly 2 detachably installed on the outer water jacket 200. The sliding column 1 is inserted into the limiting and guiding assembly 2 through guiding cooperation as the rotor 100 descends and sleeves into the outer water jacket 200. The limiting and guiding assembly 2 contacts the lower bearing 101 of the rotor as the rotor 100 descends, limiting the descending height of the rotor 100.

[0027] In the above-described rotor press-fitting outer water jacket guiding and limiting device, the sliding column 1 is coaxially connected to the lower end of the rotor 100, and the limiting and guiding assembly 2 is installed on the outer water jacket. When the rotor descends and sleeves into the outer water jacket, the axial direction of the rotor is positioned through the guiding cooperation between the sliding column 1 and the limiting and guiding assembly 2, ensuring that the rotor does not deflect axially during assembly. And through the contact between the limiting and guiding assembly 2 and the lower bearing of the rotor, the descending height of the rotor is limited, ensuring that the rotor is assembled to the required height in the outer water jacket. After the rotor descends in place, the rotor is positioned in the outer water jacket, and then the sliding column 1 is removed from the lower end of the rotor and the limiting and guiding assembly 2 is removed from the outer water jacket, thus completing the assembly of the rotor and the outer water jacket.

[0028] Among them, the limiting and guiding assembly 2 includes a limiting plate 21 positioned on the lower end face of the outer water jacket and a limiting guide sleeve 22 installed on the limiting plate 21. The limiting guide sleeve 22 extends into the lower inner hole of the outer water jacket 200 with a clearance fit. The limiting plate 21 is positioned at the lower end of the outer water jacket 200 by bolt connection, used to position the limiting guide sleeve 22, so that the limiting guide sleeve 22 can extend into the lower inner hole of the outer water jacket 200. After the assembly is completed, the limiting plate 21 is removed from the outer water jacket, and the limiting and guiding assembly 2 can be disassembled.

[0029] Among them, the inner wall of the limiting guide sleeve 22 includes a guiding wall 22.1 and a guiding wall 22.2 coaxially arranged below the guiding wall 22.1. The diameter of the guiding wall 22.1 is 1 - 2 mm larger than the diameter of the guiding wall 22.2, and a radial annular step surface 22.3 is formed between the guiding wall 22.1 and the guiding wall 22.2. The guiding wall 22.2 and the sliding column 1 have a small clearance fit of 0.01 - 0.05 mm. Since the limiting guide sleeve 22 is arranged in the outer water jacket 2, and the sliding column 1 is blindly inserted into the limiting guide sleeve 22, the guiding wall 22.1 corrects the entering position of the sliding column 1 when the sliding column 1 enters the limiting guide sleeve 22, ensuring that the sliding column 1 can smoothly enter the limiting guide sleeve 22. The small clearance fit between the guiding wall 22.2 and the sliding column 1 positions the axial direction of the sliding column, ensuring that the sliding column does not tilt, playing a guiding role to ensure that the rotor does not tilt.

[0030] Among them, the outer wall of the limiting guide sleeve 22 has a radial annular step surface 22.4. The top surface of the limiting guide sleeve 22 contacts the end face of the inner ring of the lower bearing 101 as the rotor descends, and the annular step surface 22.4 contacts the end face of the bearing seat of the lower bearing 101, limiting the descending height of the rotor. When the rotor descends in place, the annular step surface 22.4 contacts the end face of the bearing seat, and the end face of the inner ring of the lower bearing 101 contacts the top surface of the limiting guide sleeve 22. A contact stop is formed through the annular step 22.4, avoiding damage to the lower bearing 101 due to excessive axial force and improving the reliability of rotor press-fitting.

[0031] Among them, the sliding column 1 is composed of a connecting section 11 and a guiding section 12. The outer diameter of the connecting section 11 is smaller than that of the guiding section 12. An annular step surface III 13 is formed between the connecting section 11 and the guiding section 12. The connecting section 11 is in threaded fit connection with the inner hole of the rotating shaft 102 of the rotor 100, and the annular step surface III 13 abuts against the lower end surface of the rotating shaft 102. The connection between the connecting section 11 and the inner hole of the rotating shaft 102 realizes the coaxial connection between the sliding column 1 and the rotating shaft 102. The guiding section 12 is in guiding fit with the limiting guide sleeve 22 to position the rotor axially.

[0032] Among them, the connecting section 11 is of a solid structure, and the guiding section 12 is of a hollow tubular shape. The connecting section 11 is press-fitted into the guiding section 12 with an interference fit. The mass of the sliding column is reduced, and the hoisting mass after the connection between the rotor and the sliding column is reduced, which is convenient for hoisting.

[0033] The present invention also protects a method for pressing a rotor into an outer water jacket. Using the rotor pressing into the outer water jacket guiding and limiting device described above, it is characterized in that the steps are as follows:

[0034] First: coaxially connect the sliding column 1 with the lower end of the rotor 100;

[0035] Then, according to the installation height of the rotor 100 in the outer water jacket, determine the installation height of the limiting and guiding assembly 2 on the outer water jacket, and then install the limiting and guiding assembly 2 on the outer water jacket 200;

[0036] Next, lift the rotor 100, and then align the sliding column 1 with the outer water jacket 200 and slowly lower it into the outer water jacket 200;

[0037] After that, insert the sliding column 1 into the limiting and guiding assembly 2 in a guiding fit manner, and then press down the rotor 100 until the limiting and guiding assembly 2 contacts the lower bearing 101, so that the rotor is pressed in place.

[0038] For the method of pressing the rotor into the outer water jacket described above, when the rotor descends and sleeves into the outer water jacket, the axial direction of the rotor is positioned through the guiding fit between the sliding column 1 and the limiting and guiding assembly 2, ensuring that the rotor does not deviate axially during assembly. And through the contact between the limiting and guiding assembly 2 and the lower bearing of the rotor, the descending height of the rotor is limited, ensuring that the rotor is assembled in the outer water jacket to the required height. After the rotor descends in place, the rotor is positioned in the outer water jacket. Then, the sliding column 1 is removed from the lower end of the rotor and the limiting and guiding assembly 2 is removed from the outer water jacket, and the assembly of the rotor and the outer water jacket is completed.

[0039] Among them, "determining the installation height of the limiting and guiding assembly 2 on the outer water jacket" refers to determining the height of the limiting guide sleeve 22. The height of the top surface of the limiting guide sleeve 22 in the outer water jacket is the installation height of the rotor in the outer water jacket, and the height of the limiting guide sleeve 22 is used to adjust the installation height of the rotor in the outer water jacket.

[0040] Among them, "inserting the sliding column 1 into the limit guiding assembly 2 in a guiding fit" means: slowly lowering the rotor 100 to make the sliding column 1 enter the guiding wall 22.1, then adjusting the position of the sliding column 1 to further lower the sliding column 1 into the guiding wall 22.2, so that the sliding column 1 is in guiding fit with the limit guide sleeve 22. Since the limit guide sleeve 22 is arranged in the outer water jacket 2 and the insertion of the sliding column 1 into the limit guide sleeve 22 is a blind insertion, the guiding wall 22.1 corrects the entry position of the sliding column 1 when the sliding column 1 enters the limit guide sleeve 22, ensuring that the sliding column 1 can smoothly enter the limit guide sleeve 22. The guiding wall 22.2 is in a small clearance fit with the sliding column 1 to position the axial direction of the sliding column, ensuring that the sliding column does not tilt, playing a guiding role to ensure that the rotor does not tilt.

[0041] The technical solutions of the embodiments of the present invention are completely described above in conjunction with the accompanying drawings. It should be noted that the described embodiments are only a part of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts fall within the scope of protection of the present invention.

Claims

1. Rotor press-fitting outer water jacket guiding and limiting device, characterized in that: It includes a sliding column (1) coaxially connected to the lower end of a rotor (100), and a limit guiding component (2) detachably mounted on an outer water jacket (200). As the sliding column (1) descends with the rotor (100) and is sleeved into the outer water jacket (200), it is guided and inserted into the limit guiding component (2) in a fitting manner. The limit guiding component (2) contacts the lower bearing (101) of the rotor as the rotor (100) descends, thereby limiting the descending height of the rotor (100). The described limit guiding component (2) includes a limit plate (21) positioned on the lower end face of the outer water jacket and a limit guiding sleeve (22) mounted on the limit plate (21). The limit guiding sleeve (22) extends into the lower inner hole of the outer water jacket (200) with a clearance fit. The inner wall of the described limit guiding sleeve (22) includes a guiding-in wall (22.1) and a guiding wall (22.2) coaxially arranged below the guiding-in wall (22.1). The diameter of the guiding-in wall (22.1) is 1 - 2 mm larger than that of the guiding wall (22.2). A radial annular step surface one (22.3) is formed between the guiding-in wall (22.1) and the guiding wall (22.2). The guiding wall (22.2) has a small clearance fit of 0.01 - 0.05 mm with the sliding column (1). A radial annular step surface two (22.4) is provided on the outer wall of the described limit guiding sleeve (22). The top surface of the limit guiding sleeve (22) contacts the inner ring end face of the lower bearing (101) as the rotor descends, and the annular step surface two (22.4) contacts the bearing seat end face of the lower bearing (101), thereby limiting the descending height of the rotor. The described sliding column (1) is composed of a connecting section (11) and a guiding section (12). The outer diameter of the connecting section (11) is smaller than that of the guiding section (12). A radial annular step surface three (13) is formed between the connecting section (11) and the guiding section (12). The connecting section (11) is threadedly and fittingly connected to the inner hole of the rotating shaft (102) of the rotor (100), and the annular step surface three (13) abuts against the lower end face of the rotating shaft (102).

2. The rotor press-fitting outer water jacket guiding and limiting device according to claim 1, wherein: The described connecting section (11) has a solid structure, and the guiding section (12) is a hollow tube. The connecting section (11) is press-fitted into the guiding section (12) with an interference fit.

3. Method for pressing the rotor into the outer water jacket, adopting the rotor pressing into the outer water jacket guiding and limiting device according to any one of claims 1 to 2, characterized in that: The steps are as follows: First: coaxially connect the sliding column (1) to the lower end of the rotor (100). Then, according to the installation height of the rotor (100) in the outer water jacket, determine the installation height of the limit guiding component (2) on the outer water jacket, and then mount the limit guiding component (2) on the outer water jacket (200). Next, lift the rotor (100), and then align the sliding column (1) with the outer water jacket (200) and slowly lower it into the outer water jacket (200).

4. The method for pressing the rotor into the outer water jacket according to claim 3, characterized in that: After that, guide and insert the sliding column (1) into the limit guiding component (2) in a fitting manner, and then press down the rotor (100) until the limit guiding component (2) contacts the lower bearing (101), so that the rotor is pressed in place. "Determining the installation height of the limit guiding component (2) on the outer water jacket" means determining the height of the limit guiding sleeve (22).

5. The method for press-fitting a rotor into an outer water jacket according to claim 3, characterized in that: "Insert the slide post (1) into the limit guiding component (2) in a guiding fit" means: Slowly lower the rotor (100) so that the slide post (1) enters the guiding wall (22.1), then adjust the position of the slide post (1) so that the slide post (1) further descends into the guiding wall (22.2), and make the slide post (1) and the limit guiding sleeve (22) in a guiding fit.

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