Quick-connect permanent magnet synchronous motor

Abstract

A quick-connect permanent magnet synchronous motor includes a housing, a motor shaft, a rotor yoke, and a stator. The housing is formed by a rear shell and a front shell. The motor shaft is mounted in the housing via bearings, with both ends of the motor shaft exposed outside the housing, one end extending beyond the housing. The stator is housed within the housing and fitted onto the motor shaft. Rotor yokes are mounted on both sides of the stator on the motor shaft, and magnets are distributed on the rotor yokes. A housing coaxial positioning mechanism and a housing phase alignment mechanism are provided on the outer end face of the housing. Coaxial connection mechanisms and position alignment mechanisms are provided at both ends of the motor shaft. A rotor coaxial positioning mechanism, a rotor position positioning mechanism, and a rotor phase alignment mechanism are provided between the rotor yoke and the motor shaft. This invention ensures parameter consistency when multiple motors are connected in series, and the positioning process is fast and accurate, solving the reliability and stability issues in series connection applications and significantly improving the assembly accuracy during motor series connection.

Description

Technical Field

[0001] This utility model relates to a permanent magnet synchronous axial motor capable of achieving rapid series connection, belonging to the field of motor wiring technology. Background Technology

[0002] With the widespread application of permanent magnet synchronous axial motors, many applications require high torque output within limited space, leading to an increasing number of series-connected motors. Series positioning of permanent magnet synchronous axial motors typically involves time-consuming and labor-intensive component assembly, prone to issues with concentricity, coaxiality, phase angle, and positional accuracy, and is inconvenient for subsequent maintenance and disassembly. To achieve series connection of multiple motors and ensure concentricity, coaxiality, phase angle, and positional accuracy among them, existing methods require using specialized instruments to measure the phase angle, positional accuracy, and concentricity of each motor, then connecting them sequentially using bolts and adjusting blocks. This method struggles to guarantee the positional relationship between the motors, is time-consuming and labor-intensive, and suffers from slow installation and disassembly, resulting in low efficiency.

[0003] Series positioning between permanent magnet synchronous axial motors typically requires time-consuming and labor-intensive component assembly, and is prone to problems such as concentricity, coaxiality, phase angle, and positional accuracy. It requires a considerable amount of time to accurately adjust the concentricity and position of each motor, and subsequent maintenance and disassembly are inconvenient. For positions requiring frequent disassembly or adjustment, existing permanent magnet synchronous axial motors generally cannot meet the need for speed and convenience.

[0004] Therefore, how to achieve rapid connection and convenient assembly / disassembly of multiple permanent magnet synchronous axial motors while ensuring concentricity, coaxiality, phase angle, and position accuracy has become an urgent technical problem to be solved. Utility Model Content

[0005] This invention addresses the problems existing in the series positioning technology of permanent magnet synchronous axial motors by providing a quick-connect permanent magnet synchronous motor that is accurate in positioning, quick in connection, and easy to assemble and disassemble.

[0006] The quick-connect permanent magnet synchronous motor of this utility model adopts the following technical solution:

[0007] The permanent magnet synchronous motor includes a housing, a motor shaft, a rotor yoke, and a stator. The housing is formed by a rear housing and a front housing. The motor shaft is mounted in the housing via bearings, with both ends of the motor shaft exposed outside the housing, one end of which extends out of the housing. The stator is housed in the housing and fitted onto the motor shaft. Rotor yokes are mounted on both sides of the stator on the motor shaft, and magnets are distributed on the rotor yokes. A housing coaxial positioning mechanism and a housing phase alignment mechanism are provided on the outer end face of the housing. Coaxial connection mechanisms and position alignment mechanisms are provided at both ends of the motor shaft. A rotor coaxial positioning mechanism, a rotor position positioning mechanism, and a rotor phase alignment mechanism are provided between the rotor yoke and the motor shaft.

[0008] The rear and front housings are provided with bolt connection holes, and the rear and front housings are connected by bolts. The bolts can be used to connect the rear and front housings of a single motor, or to connect multiple motors connected in series.

[0009] The bearings are installed in both the rear and front housings for mounting the motor shaft.

[0010] The coaxial positioning mechanism of the housing includes a connecting groove on the outer end face of the rear housing and a connecting boss on the outer end face of the front housing. The center diameter and the included angle of the two sides of the connecting groove are the same as the center diameter and the included angle of the two sides of the connecting boss. The connecting boss can be positioned in the connecting groove, enabling the rear housing of one motor to be quickly connected and positioned with the front housing of another motor, ensuring the consistency of the position of the motors installed in series.

[0011] The housing phase alignment mechanism is provided with positioning pin holes on both the rear and front housings, and the angular position of the positioning pin holes is consistent with the phase angle reference line (the phase angle line in the motor design).

[0012] The coaxial connection mechanism has an external spline at one end of the motor shaft and an internal spline at the other end. The external and internal splines mate (the teeth of the external spline and the keyway of the internal spline are in close contact). Through the mating of the external and internal splines (the external spline of one motor shaft is inserted into the internal spline of another motor shaft), the motor shafts of one motor can be quickly connected and positioned to each other.

[0013] The aforementioned positional alignment mechanism consists of external splines and internal splines at both ends of the motor shaft. The internal spline has a axial angular keyway in its keyway, and the external spline has an axial angular key tooth in its key teeth. The axial angular key tooth and the axial angular keyway are positioned at the same angle, ensuring the consistency of the position angle of each motor shaft when they are connected in series.

[0014] The rotor coaxial positioning mechanism consists of a rotor yoke step on the motor shaft and a rotor yoke stop on the end face of the rotor yoke. The rotor yoke stop is fitted onto the rotor yoke step, and the two work together to ensure the concentricity of the rotor yoke and the motor shaft.

[0015] The rotor positioning mechanism comprises a rotor yoke step on the motor shaft, an angular groove on the rotor yoke step, and an angular boss on the rotor yoke. The position angle of the angular boss is aligned with the phase angle reference line. The angular boss is inserted into the angular groove on the motor shaft to achieve angular positioning of the rotor yoke on the motor shaft. The angular position accuracy of the rotor yoke relative to the motor shaft is ensured through the cooperation between the angular boss and the angular groove.

[0016] The rotor phase alignment mechanism consists of a rotor yoke step on the motor shaft, a axial angular groove on the rotor yoke step, an external spline and an internal spline at both ends of the motor shaft, a axial angular keyway in the keyway of the internal spline, and a axial angular key tooth in the key teeth of the external spline. The position angles of the axial angular groove, the axial angular key tooth and the axial angular keyway coincide with the phase angle reference line, ensuring the consistency of the phase angle of each motor when installed in series.

[0017] The position of the magnet is consistent with the angular position of the rotor yoke angular boss. When the motor shaft and rotor yoke are installed together, the position of the magnet is also consistent with the phase angle reference line of the motor shaft.

[0018] Assemble the motor shaft, rotor yoke, stator, and housing together, inserting locating pins into the locating pin holes on the rear and front housings. The angular position of the locating pin holes on the rear and front housings, and the angles of the angular keyway and angular key teeth on the motor shaft, all coincide with the phase angle reference line. Secure the rear and front housings together with bolts to form a permanent magnet synchronous motor. For series connection of multiple permanent magnet synchronous motors, connect the motor shafts of each motor sequentially using a coaxial connection mechanism, and then secure the rear and front housings of all motors together with bolts. This automatically satisfies the concentricity and position of each motor.

[0019] This invention enables automatic installation of motors onto a common reference, ensuring consistency between the rotor phase angle, the motor shaft position angle, and the housing positioning angle. It achieves uniformity among design angles, manufacturing angles, and installation angles, guaranteeing parameter consistency when multiple motors are connected in series. This ensures concentricity, coaxiality, and magnet phase angle consistency between adjacent motors, making the entire positioning process fast and precise. It enables rapid assembly and disassembly of motors in series, fundamentally solving reliability and stability issues in series connections, significantly improving assembly accuracy during motor series connection, drastically reducing positioning and installation time, minimizing motor installation errors, reducing labor intensity, eliminating human error, ensuring assembly precision and quality, and improving work efficiency. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the permanent magnet synchronous motor with quick connection according to this utility model.

[0021] Figure 2 yes Figure 1 Top view.

[0022] Figure 3 yes Figure 1 A bottom view.

[0023] Figure 4 yes Figure 2 The left view.

[0024] Figure 5 This is a schematic diagram of the structure of the motor shaft in this utility model.

[0025] Figure 6 yes Figure 5 The left view.

[0026] Figure 7 yes Figure 5 The right view.

[0027] Figure 8 This is a schematic diagram showing the connection of the motor shaft, rotor yoke, and stator in this utility model.

[0028] Figure 9 yes Figure 8 The left view.

[0029] Figure 10 yes Figure 8 The right view.

[0030] Figure 11 This is a schematic diagram of multiple motors connected in series.

[0031] In the diagram: 1. Motor shaft, 2. Rotor yoke, 3. Stator, 4. Housing, 5. First motor, 6. Second motor, 7. Third motor; 101. Rotor yoke step, 102. Bearing step, 103. External spline, 104. Internal spline, 105. Shaft angular key, 106. Shaft angular slot, 107. Shaft angular keyway, 108. Phase angle reference plane;

[0032] 201. Rotor yoke angular boss; 202. Rotor yoke phase angle line; 203. Magnet; 204. Rotor yoke stop.

[0033] 401. Front housing, 402. Locating pin hole, 403. Connecting groove, 404. Connecting boss, 405. Connecting bolt, 406. Locating pin phase angle line, 407. Bearing, 408. Rear housing. Detailed Implementation

[0034] This utility model relates to a quick-connect permanent magnet synchronous motor, such as... Figure 1As shown, the device includes a motor shaft 1, a rotor yoke 2, a stator 3, and a housing 4. The rotor yoke 2 is disposed on both sides of the stator 3. The motor shaft 1 is mounted on the housing 4 via bearings 407. The rotor yoke 2 and the stator 3 are disposed within the housing 4. The rotor yoke 3 is fitted onto the motor shaft, and the rotor yoke 2 is mounted on both sides of the stator 3 on the motor shaft 1. Both ends of the motor shaft 1 are exposed outside the housing 4, with one end extending beyond the housing 4.

[0035] like Figure 2 , Figure 3 and Figure 4 As shown, the outer casing 4 includes a rear casing 408 and a front casing 401 (see...). Figure 4 The rear housing 408 and the front housing 401 are connected together by bolts 405. Bearings 407 are installed in both the rear housing 408 and the front housing 401 (see...). Figure 1 ), used for mounting motor shaft 1. Both the rear housing 408 and the front housing 401 are provided with locating pin holes 402 (see... Figure 2 and Figure 3 The angular position of the locating pin hole 402 is consistent with the locating pin phase angle line 406 (the datum line used in design and manufacturing is the phase angle line). When the rear shell 408 and the front shell 401 are connected, a locating pin is inserted into the locating pin hole 402. The outer end face of the rear shell 408 is provided with a connecting groove 403 (see...). Figure 2 The included angle between the two sides of the connecting groove 403 is A; the outer end face of the front shell 401 is provided with a connecting boss 404 (see...). Figure 3 The included angle between the two sides of the connecting boss 404 is B. The center diameter and angle A of the connecting groove 403 are the same as the center diameter and angle B of the connecting boss 404, so that the connecting boss 404 can be placed in the connecting groove 403. Through the cooperation between the connecting boss 404 and the connecting groove 403, the rear housing 408 of one motor and the front housing 401 of another motor can be quickly connected and positioned (see...). Figure 11 This ensures the consistency of the position of each motor when they are installed in series.

[0036] The rear housing 408 and the front housing 401 fix the center position of the stator 3, positioning the stator 3 so that it is located between the two rotor yokes 2. The rear housing 408 and the front housing 401 in a single motor can be connected by bolts 405, or multiple motors connected in series can be connected.

[0037] like Figure 5 , Figure 6 and Figure 7As shown. The motor shaft 1 has two rotor yoke steps 101 and two bearing steps 102. The rotor yoke steps 101 are used to install the rotor yoke 2, and the bearing steps 102 are used to install the bearing 407. The bearing steps 102 mate with the inner ring of the bearing 407 to ensure the coaxiality of the bearing 407 and the motor shaft 1. The two rotor yoke steps 101 have axial angular grooves 106. One end of the motor shaft 1 extends out of the front housing 401, and this end is provided with an external spline 103. The other end of the motor shaft 1 is provided with an internal spline 104, protruding from the rear housing 408. An axial angular keyway 107 is provided in the keyway of the internal spline 104 (see...). Figure 6 The external spline 103 has a axial angular key tooth 105 (see...). Figure 6 The angle of the axial key tooth 105 coincides with the phase angle reference line 108 (the reference line used during design and manufacturing as the phase angle reference line), and the angle of the axial keyway 107 also coincides with the phase angle reference line 108. This ensures the consistency of the phase angles of each motor during series installation. Each key tooth in the external spline 103 and each keyway in the internal spline 104 are matched one-to-one in size and shape, and all key teeth can be inserted into their respective keyways, including the axial key tooth 105 inserting into the axial keyway 107. Through the cooperation of the external spline 103 and the internal spline 104 (the external spline 103 of one motor shaft is inserted into the internal spline of another motor shaft (see...)... Figure 11 This allows for quick connection and positioning of the motor shaft of one motor with the motor shaft of another motor.

[0038] like Figure 8 As shown, rotor yokes 2 are provided on both rotor yoke steps 101 at the two locations on the motor shaft 1. Figure 9 and Figure 10 As shown, the rotor yoke 2 is provided with a rotor yoke angular boss 201, the angle of which is consistent with the rotor yoke phase angle line 202. The rotor yoke angular boss 201 can be inserted into the shaft angular slot 106 on the motor shaft 1 to achieve the positioning of the rotor yoke 2 on the motor shaft 1. The angular position of the rotor yoke 2 and the shaft angular slot 106 are guaranteed by the cooperation between the rotor yoke angular boss 201 and the shaft angular slot 106. The end face of the rotor yoke 2 is provided with a rotor yoke stop 204. The rotor yoke stop 204 is fitted onto the rotor yoke step 101, and the two cooperate to ensure the concentricity of the rotor yoke 2 and the motor shaft 1. Magnets 203 are distributed on the rotor yoke 2. The position of the magnets 203 is consistent with the angular position of the rotor yoke angular boss 201 through the rotor yoke phase angle line 202. When the motor shaft 1 and the rotor yoke 2 are installed together, the position of the magnets 203 is also consistent with the phase angle reference line 108 of the motor shaft 1.

[0039] As described above, the motor shaft 1, rotor yoke 2, stator 3, and housing 4 are assembled together. When connecting the rear housing 408 and front housing 401, a locating pin is inserted into the locating pin hole 402. The angular position of the locating pin hole 402 on the assembled rear housing 408 and front housing 401 is consistent with the locating pin phase angle line 406. The angles of the shaft angular keyway 107 and shaft angular key teeth 105 in the motor shaft 1 coincide with the phase angle reference line 108. The locating pin phase angle line 406 and the rotor yoke phase angle line 202 both coincide with the phase angle reference line 108. These are all phase angle lines designed for the motor and can be used as reference lines for related components during processing, ensuring that the phase angle of the motor after assembly is consistent with the design (the motor phase angle refers to the angle by which the motor rotor magnetic poles deviate from the main magnetic field poles). The rear housing 408 and front housing 401 are then fixed together with bolts 405 to form a permanent magnet synchronous motor.

[0040] For series connection of multiple permanent magnet synchronous motors, such as Figure 11 As shown, first align and insert the axial keyway 107 in the first motor 5 with the axial key tooth 105 in the second motor 6 until the connecting groove 403 in the first motor 5 and the connecting boss 404 in the second motor 6 are in complete contact. Connect the second motor 6 and the third motor 7 using the same method. If there are more motors, connect them all in sequence using the above method. Then, use bolts 405 to fix the rear housing 408 and front housing 401 of all motors together, thus automatically satisfying the concentricity and positional accuracy of each motor.

[0041] This invention utilizes specific connectors and guiding devices to ensure consistent parameters for each motor shaft, rotor yoke, and magnet. Simultaneously, it employs splines with special teeth and a tapered boss and groove structure to automatically install them onto the same reference point in a short time, guaranteeing the concentricity, coaxiality, phase angle, and positional accuracy of each motor, achieving rapid installation and disassembly. It maintains consistency between the rotor phase angle, the slotting angle of the motor shaft, the angle of the special spline teeth, and the angle of the locating pins on the housing. This unifies the design angles, manufacturing angles, and installation angles, ensuring consistency in concentricity, coaxiality, and magnet phase angle between adjacent motors. This guarantees parameter consistency when multiple motors are connected in series, fundamentally solving the reliability and stability issues of series connections, reducing labor intensity, eliminating human error, and ensuring assembly accuracy and quality.

Claims

1. A fast-connect permanent magnet synchronous motor, characterized in that, It includes a housing, a motor shaft, a rotor yoke, and a stator; the housing is formed by a rear housing and a front housing; the motor shaft is mounted in the housing via bearings, with both ends of the motor shaft exposed outside the housing, one end of which extends out of the housing; the stator is housed in the housing and fitted onto the motor shaft; rotor yokes are mounted on both sides of the stator on the motor shaft, and magnets are distributed on the rotor yokes; a housing coaxial positioning mechanism and a housing phase alignment mechanism are provided on the outer end face of the housing; a coaxial connection mechanism and a position alignment mechanism are provided at both ends of the motor shaft; a rotor coaxial positioning mechanism, a rotor position positioning mechanism, and a rotor phase alignment mechanism are provided between the rotor yoke and the motor shaft.

2. The permanent magnet synchronous motor with rapid connection according to claim 1, characterized in that, The rear shell and the front shell are provided with bolt connection holes, and the rear shell and the front shell are connected by bolts.

3. The permanent magnet synchronous motor with rapid connection according to claim 1, characterized in that, The coaxial positioning mechanism of the housing includes a connecting groove provided on the outer end face of the rear housing and a connecting boss provided on the outer end face of the front housing. The center diameter and the included angle of the two sides of the connecting groove are the same as the center diameter and the included angle of the two sides of the connecting boss.

4. The permanent magnet synchronous motor with rapid connection according to claim 1, characterized in that, The housing phase alignment mechanism is provided with positioning pin holes on both the rear and front housings, and the angular position of the positioning pin holes is aligned with the phase angle reference line.

5. The permanent magnet synchronous motor with rapid connection according to claim 1, characterized in that, The coaxial connection mechanism has an external spline at one end of the motor shaft and an internal spline at the other end, with the external spline and internal spline engaging.

6. The permanent magnet synchronous motor with rapid connection according to claim 1, characterized in that, The aforementioned positional alignment mechanism consists of an external spline and an internal spline at both ends of the motor shaft. The internal spline has a axial angular keyway in its keyway, and the external spline has an axial angular key tooth in its keyway. The axial angular key tooth and the axial angular keyway are positioned at the same angle.

7. The permanent magnet synchronous motor with rapid connection according to claim 1, characterized in that, The rotor coaxial positioning mechanism has a rotor yoke step on the motor shaft and a rotor yoke stop on the end face of the rotor yoke, which is fitted onto the rotor yoke step.

8. The permanent magnet synchronous motor with rapid connection according to claim 1, characterized in that, The rotor position positioning mechanism consists of a rotor yoke step on the motor shaft, an axial groove on the rotor yoke step, and a rotor yoke axial boss on the rotor yoke. The position angle of the rotor yoke axial boss is consistent with the phase angle reference line, and the rotor yoke axial boss is inserted into the axial groove on the motor shaft.

9. The permanent magnet synchronous motor with rapid connection according to claim 1, characterized in that, The rotor phase alignment mechanism is provided with a rotor yoke step on the motor shaft, and a axial angular groove on the rotor yoke step. External splines and internal splines are respectively provided at both ends of the motor shaft. An axial angular keyway is provided in the keyway of the internal spline, and an axial angular key tooth is provided in the key teeth of the external spline. The position angle of the axial angular groove, the axial angular key tooth, and the axial angular keyway coincides with the phase angle reference line.

10. The permanent magnet synchronous motor with rapid connection according to claim 1, characterized in that, The position of the magnet is consistent with the angular position of the rotor yoke angular boss.

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