An integrated mechanism for electric spindles directly driven by a permanent magnet motor

Abstract

This utility model discloses an integrated mechanism for a direct-drive electric spindle of a permanent magnet motor, relating to the field of electric spindle integration. The integrated mechanism includes a rotor, a housing, and a bearing housing. A flange is fixed to the end of the bearing housing, and an alignment block is inserted into the side of the flange. A positioning bolt is threaded through the side of the alignment block. This changes the existing interference fit installation method of the rotor and bearing housing, instead using a common flange connection structure at the connection point. The wedge-shaped alignment block is used for coaxial installation, and the positioning bolt positions the alignment block. This flange connection method allows for rapid structural installation, and as the positioning bolt tightens, the inner wall of the alignment block's push-mounting groove ensures coaxial installation, avoiding the difficulties of press-fit installation and the problem of polarization caused by eccentric installation.

Description

Technical Field

[0001] This utility model proposes an electric spindle integration mechanism, which relates to the field of electric spindle integration, and specifically to an electric spindle integration mechanism with direct drive of a permanent magnet motor. Background Technology

[0002] The electric spindle integrated mechanism refers to the motor rotor and spindle being press-fitted into a whole through an interference fit. The stator is embedded in the cooling sleeve and fixed to the spindle housing, forming a compact unit that completely replaces intermediate transmission components such as belts and gears. The motor is built into the housing without an outer shell, and the rotor directly drives the spindle to rotate. The front and rear ends are supported by precision bearings.

[0003] The biggest problem with this direct-drive rotary structure is ensuring the stability of the rotation center. Because the rotor and spindle are assembled by press fitting, it is easy for the center of gravity to shift, causing the motor to become polarized. This not only affects the stability of the motor operation and the speed, but also increases the difficulty of installation.

[0004] Therefore, those skilled in the art have proposed an integrated electric spindle mechanism for direct drive of permanent magnet motor, which optimizes and improves the mounting structure of the rotor and spindle, making it not only convenient and quick to install, but also automatically calibrating the center of gravity of the rotor during installation. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides an integrated electric spindle mechanism for direct drive of a permanent magnet motor. The rotor and bearing housing, which are currently press-fitted with an interference fit, are designed to be bolted together with alignment blocks for calibration. This not only facilitates the connection between the rotor and bearing housing, but also automatically aligns the shaft and bearing housing as installation progresses, preventing polarization.

[0006] To achieve the above objectives, this utility model is implemented through the following technical solution: an integrated electric spindle mechanism for direct drive of a permanent magnet motor, comprising a rotor, a housing, and a bearing seat. The housing is coaxially sleeved on the outside of the rotor through the bearing seats at both ends. Permanent magnets are installed on the inner wall of the housing, and the rotor is driven to rotate by the magnetic field formed by the permanent magnets. The rotor directly drives the rotating shaft with the bearing seat fixed at its end to output power.

[0007] The bearing housing and the rotor are connected by an alignment block, which has a wedge-shaped surface. As the alignment block is tightened, the rotor and the bearing housing are gradually aligned to achieve coaxial installation.

[0008] A positioning bolt is provided through the side of the alignment block. The positioning bolt is threaded to the alignment block. During the tight-fitting process of the positioning bolt and the alignment block, the rotor and bearing seat are pushed and moved for alignment. The positioning bolt is used to position the installation of the alignment block to prevent loosening.

[0009] Preferably, a flange is fixed at the connection end between the rotor and the bearing housing. The flange and the positioning bolts are used in the same way as the existing flange connection. The difference is that the alignment block is used to correct and push the rotor and the bearing housing to ensure that they are coaxially installed with the shaft.

[0010] The flange has a wedge-shaped groove that runs vertically through its flat side and extends through the sidewalls of two corresponding flanges, ensuring that as the alignment block moves forward, the wedge-shaped surface applies a pushing force to the rotor and bearing housing.

[0011] Preferably, the flange has a mounting groove on its side, and the rotor has a fixing block fixed at its end. The rotor is aligned and installed by the fixing block corresponding to the mounting groove on the side of the flange. This provides a certain guiding and restricting effect on the installation of the rotor and the bearing seat, facilitating stable positioning of both.

[0012] Preferably, the alignment block is inserted into the inner wall of the wedge-shaped groove, and the wedge-shaped surface of the alignment block is set to correspond to the sliding installation direction of the rotor, which ensures that the rotor and bearing seat can be coaxially installed as long as they move and calibrate along the direction of the installation groove.

[0013] Preferably, a washer is provided on the side of the positioning bolt to ensure stable installation of the positioning bolt relative to the flange, and is not limited to the opening of the mounting groove.

[0014] The positioning bolt has a threaded connection to a lock nut on one end of the alignment block. After the positioning bolt and the alignment block are installed, the lock nut is sleeved on the end of the positioning bolt that extends out of the alignment block to prevent the alignment block from loosening during use.

[0015] This utility model discloses an integrated mechanism for a permanent magnet motor-driven electric spindle, which has the following beneficial effects:

[0016] This permanent magnet motor direct-drive electric spindle integrated mechanism changes the existing interference fit installation method of rotor and bearing housing. Instead, it sets up the existing common flange connection structure at the connection between the two. The two are aligned and installed coaxially by squeezing and aligning with wedge-shaped alignment blocks. The position of the alignment blocks is then positioned by positioning bolts. Not only can the flange connection installation method achieve rapid structural installation, but as the positioning bolts are tightened, the inner wall of the squeezing and aligning mounting groove of the alignment blocks ensures the coaxial installation of the two. This avoids the problem of difficult installation of the press-fit structure and the polarization phenomenon caused by eccentric installation. 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 overall structure of this utility model;

[0019] Figure 2 This is a cross-sectional view of the overall structure of this utility model;

[0020] Figure 3 This is a schematic diagram of the connection structure between the rotor and the bearing housing of this utility model;

[0021] Figure 4 This is an assembly drawing of the rotor and bearing housing connection structure of this utility model.

[0022] In the diagram: 1. Rotor; 2. Chassis; 3. Bearing housing; 4. Alignment block; 5. Positioning bolt; 6. Flange; 7. Wedge groove; 8. Mounting groove; 9. Fixing block; 10. Gasket; 11. Anti-loosening nut. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments of this utility model are described clearly and completely. Obviously, the described embodiments are only some embodiments of this utility model, 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.

[0024] This utility model embodiment discloses an integrated electric spindle mechanism for direct drive of a permanent magnet motor;

[0025] According to the appendix Figure 1-4 As shown, it includes a rotor 1, a housing 2, and a bearing seat 3. The housing 2 is coaxially sleeved on the outside of the rotor 1 through the bearing seats 3 at both ends. Permanent magnets are installed on the inner wall of the housing 2. The magnetic field formed by the permanent magnets drives the rotor 1 to rotate. The rotor 1 directly drives the shaft with the bearing seats 3 fixed at its end to output power.

[0026] The rotor 1 is installed at both ends through bearing seats 3. The connecting surface between the bearing seat 3 and the rotor 1 is provided with alignment blocks 4. The alignment blocks 4 have a wedge-shaped structure. As the alignment blocks 4 are tightened, the rotor 1 and the bearing seat 3 are gradually aligned to achieve automatic squeezing and alignment with small displacement, ensuring accuracy while also facilitating installation.

[0027] A positioning bolt 5 is installed through the side of the alignment block 4. The positioning bolt 5 is threadedly connected to the alignment block 4. During the tight-fitting process of the positioning bolt 5 and the alignment block 4, the rotor 1 and the bearing seat 3 are pushed and moved to be aligned. The installation of the alignment block 4 is positioned by the positioning bolt 5 to prevent loosening.

[0028] The connection end between rotor 1 and bearing housing 3 is fixed with flange 6. The use of flange 6 and positioning bolt 5 is the same as the existing flange connection. The difference is that alignment block 4 is used to correct and push rotor 1 and bearing housing 3 to ensure that they are coaxially installed with the shaft.

[0029] A wedge-shaped groove 7 is vertically opened through the flat side of the flange 6, and the wedge-shaped groove 7 is opened through the side wall of the two corresponding flanges 6, so as the positioning block 4 advances, the wedge-shaped surface applies a squeezing and pushing action to the rotor 1 and the bearing seat 3.

[0030] The flange 6 has a mounting groove 8 on its side, and a fixing block 9 is fixed at the end of the rotor 1. The rotor 1 is installed by aligning the fixing block 9 with the mounting groove 8 on the side of the flange 6. This provides a certain guiding and restricting effect on the installation of the rotor 1 and the bearing seat 3, making it convenient to stably position the two during installation.

[0031] The alignment block 4 is inserted into the inner wall of the wedge groove 7. The wedge surface of the alignment block 4 is set to correspond to the sliding installation direction of the rotor 1, which ensures that the rotor 1 and the bearing seat 3 can be coaxially installed as long as they move and calibrate along the direction of the mounting groove 8.

[0032] The positioning bolt 5 is fitted with a gasket 10 on its side to ensure stable installation of the positioning bolt 5 relative to the flange 6, and is not limited to the opening of the mounting groove 8.

[0033] The positioning bolt 5 is threaded through one end of the alignment block 4 and has a locking nut 11. After the positioning bolt 5 and the alignment block 4 are installed, the locking nut 11 is sleeved on the end of the positioning bolt 5 that extends out of the alignment block 4 in the opposite direction to prevent the alignment block 4 from loosening during use.

[0034] This permanent magnet motor direct-drive electric spindle integrated mechanism changes the existing interference fit installation method of rotor 1 and bearing housing 3. Instead, it sets up the existing common flange connection structure at the connection between the two. The two are coaxially installed by squeezing and aligning with wedge-shaped alignment blocks 4, and the position of alignment blocks 4 is positioned by positioning bolts 5. Not only can the flange connection installation method realize the structure installation quickly, but as the positioning bolts 5 are tightened, the inner wall of the squeezing and aligning mounting groove 8 of the alignment blocks 4 ensures the coaxial installation of the two. This avoids the problem of difficult installation of the press-fit structure and the polarization phenomenon caused by eccentric installation.

[0035] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. An integrated mechanism for a permanent magnet motor direct-drive electric spindle, comprising a rotor (1), a housing (2), and bearing seats (3), wherein the housing (2) is coaxially sleeved on the outside of the rotor (1) via bearing seats (3) at both ends, characterized in that: The bearing housing (3) and the rotor (1) are connected by an alignment block (4). The alignment block (4) is provided with a positioning bolt (5) through its side. The positioning bolt (5) is threadedly connected to the alignment block (4). The rotor (1) and the bearing housing (3) are aligned and calibrated by the alignment block (4). The positioning bolt (5) positions the alignment block (4) for installation.

2. The electric spindle integrated mechanism for direct drive of permanent magnet motor as described in claim 1, characterized in that: The rotor (1) is fixed with a flange (6) at the connection end with the bearing seat (3). A wedge groove (7) is provided through the plane side of the flange (6). The alignment block (4) is inserted into the inner wall of the wedge groove (7).

3. The electric spindle integrated mechanism for direct drive of permanent magnet motor as described in claim 2, characterized in that: The flange (6) has an installation groove (8) on its side, and the rotor (1) has a fixing block (9) fixed at its end. The rotor (1) is installed by the fixing block (9) corresponding to the installation groove (8) on the side of the flange (6).

4. The electric spindle integrated mechanism for direct drive of permanent magnet motor as described in claim 2, characterized in that: The wedge groove (7) is opened perpendicular to the plane of the flange (6), and the wedge groove (7) is opened through the side wall of the two corresponding flanges (6). The wedge face of the alignment block (4) is set in the sliding installation direction of the rotor (1).

5. The electric spindle integrated mechanism for direct drive of permanent magnet motor as described in claim 1, characterized in that: The positioning bolt (5) is fitted with a washer (10) on its side, and the positioning bolt (5) is threaded through one end of the positioning block (4) with an anti-loosening nut (11).

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