Electromagnetic lock integrated permanent magnet servo motor

Abstract

The invention discloses an integrated permanent magnet servo motor of an electromagnetic lock. The integrated permanent magnet servo motor is small in size, high in integration level, capable of being externally monitored and simple in lock gap adjustment. The contact position of the electromagnetic locking rotor is arranged outside the motor, the defects that a traditional electromagnetic lock is located inside the motor, assembling and adjusting are difficult, and the technology is complex are overcome, the working condition of the electromagnetic lock can be visually monitored and checked after assembling, and the working state of the integrated electromagnetic lock can be monitored. The electromagnetic lock rotors are adjustable, so that the independence of assembly between the electromagnetic lock rotors is realized, and the overall assembly and adjustment manufacturability is improved. The adjusting gasket is placed between the rotor of the electromagnetic lock and the shaft sleeve, the working gap of the electromagnetic lock is controlled only by adjusting the sizes of the two positions, the air gap debugging efficiency is improved, and the gasket is easy to manufacture, convenient to install, high in operability and easy to adjust.

Description

Technical Field

[0001] The invention relates to an electromagnetic lock integrated permanent magnet servo motor, belonging to the technical field of servo transmission equipment. Background Art

[0002] As a power element, the servo motor can form a servo actuation system together with a reduction device (gearbox, lead screw, etc.), and act according to the instructions under the closed-loop control algorithm running in the control driver. As the servo actuation system puts forward the demand for zero-position locking, the industry has proposed an electromechanical servo solution using a servo motor and an electromagnetic lock. Although it meets the self-locking requirements, most of them separate the electromagnetic lock and the motor independently and connect the two through a transfer structure, resulting in a larger overall structural size, heavier weight, and reduced space utilization. Therefore, in applications where weight and volume are strictly required, a servo motor solution with an integrated electromagnetic lock is required.

[0003] At present, there is a structure that integrates the electromagnetic lock with the inside of the motor body, involving the patent "A self-locking permanent magnet synchronous servo motor with high integration" (CN210518071U). This patent uses deep groove ball bearings to limit the axial position of the electromagnetic lock and the motor rotor shaft, and increases the working clearance of the electromagnetic lock by adding an adjustment gasket between the outer ring of the bearing and the electromagnetic lock. Although this method can realize the integration and clearance adjustment of the electromagnetic lock, the electromagnetic lock is located inside the motor as a whole, and the working condition of the electromagnetic lock cannot be intuitively monitored and detected after assembly. On the other hand, when using gaskets to adjust the clearance, the installation and adjustment of the gaskets requires repeated debugging of the electromagnetic lock as a whole. The whole process is complicated and the installation and adjustment process is cumbersome. Regarding the structure that eliminates the gasket and directly ensures the working clearance of the electromagnetic lock, it involves the patent "A servo motor with self-locking function" (CN115333281 A). This patent increases the structural form of the adapter shaft and the adapter shaft support frame, and realizes the clearance guarantee after assembly through the machined dimension control of the components. Although this structure eliminates the gasket adjustment, it adds the components of the adapter shaft and the support frame, resulting in an increase in the axial dimension structure, which does not meet the miniaturization requirements. In addition, it relies on strict control of the machined dimensions to ensure the clearance, which reduces the installation and replaceability of the components, and is not conducive to the maintenance guarantee of the product after use. Summary of the invention

[0004] The technical problem solved by the present invention is: to overcome the deficiencies of the prior art and to provide an electromagnetic lock integrated permanent magnet servo motor, which achieves the purpose of small size, high integration, external monitoring and simple lock gap adjustment.

[0005] The technical solution of the present invention is:

[0006] The present invention discloses an electromagnetic lock integrated permanent magnet servo motor, comprising: a motor housing, a motor stator, a motor rotor assembly, a bearing I, a bearing II, a motor end cover, an electromagnetic lock, an electromagnetic lock rotor, a shaft sleeve, a key and a locking nut; wherein,

[0007] The motor housing is a symmetrical hollow structure with one end open; the motor stator is sleeved outside the motor rotor assembly and is placed in the motor housing together with the motor rotor assembly; the axis of the motor rotor assembly coincides with the central axis of the motor housing;

[0008] The motor end cover is connected to the end of the motor housing;

[0009] One end side wall of the motor rotor assembly is connected to the inner wall of the motor housing through bearing I; the other end side wall of the motor rotor assembly is connected to the motor end cover through bearing II;

[0010] The electromagnetic lock is fixedly connected to the motor end cover;

[0011] The shaft sleeve is sleeved on one end of the motor rotor assembly near the bearing II;

[0012] The electromagnetic lock rotor is installed between the shaft sleeve and the electromagnetic lock, and is fixedly connected to the electromagnetic lock through a locking nut.

[0013] Furthermore, in the above motor, a wave washer is also included; along the axial direction of the motor housing, the wave washer is placed between the motor housing and the bearing I.

[0014] Furthermore, in the above-mentioned motor, the motor end cover is a symmetrical circular structure; a rotor mounting hole is set at the center of the circle for installing the motor rotor assembly; a bearing chamber is set on the inner wall of the through hole for installing bearing II; a mounting groove is set on the end surface of the symmetrical circular structure away from the motor housing for installing the electromagnetic lock; a locking through hole is set at the bottom of the mounting groove.

[0015] Furthermore, in the above motor, a retaining ring is also included, which is placed in the bearing chamber of the motor end cover, and the two sides of the retaining ring are respectively in contact with the bearing II and the electromagnetic locking element.

[0016] Furthermore, in the above motor, a key is also included, and a key slot is arranged on the contact side between the motor rotor assembly and the shaft sleeve; the key is placed in the key slot to connect the motor rotor assembly and the shaft sleeve.

[0017] Furthermore, in the above-mentioned motor, it also includes an adjusting gasket, which is installed between the electromagnetic lock rotor and the sleeve along the axial direction of the motor rotor assembly; the thickness of the adjusting gasket is determined according to the axial length dimension of the electromagnetic lock rotor and the distance from the end face of the electromagnetic lock to the end face of the sleeve.

[0018] Furthermore, in the above motor, the thickness of the adjustment gasket is determined according to the axial length of the electromagnetic lock rotor and the distance from the end face of the electromagnetic lock sub to the end face of the shaft sleeve, specifically:

[0019] Y=A+XB

[0020] Among them, Y is the thickness of the gasket, A is the distance from the end face of the electromagnetic lock to the end face of the sleeve, B is the axial length of the electromagnetic lock rotor, and X is the working air gap of the electromagnetic lock.

[0021] Furthermore, in the above motor, screws are also included for fixing the electromagnetic locking element on the motor end cover.

[0022] Furthermore, in the above motor, the electromagnetic locking member is provided with a locking hole corresponding to the locking through hole of the motor end cover; the screw passes through the locking through hole and the locking hole to fix the electromagnetic locking member on the motor end cover.

[0023] Furthermore, in the above motor, a plurality of through holes are evenly distributed on the motor end cover for leading out the motor leads.

[0024] The beneficial effects of the present invention and the prior art are:

[0025] (1) The present invention places the electromagnetic locking rotor contact position outside the motor, which overcomes the disadvantages of the traditional electromagnetic locking rotor being located inside the motor, such as difficult installation and adjustment and complex process. At the same time, the integration of the electromagnetic lock makes the motor structure miniaturized, the motor power density increased, and the motor working stability improved.

[0026] (2) The present invention fixes the electromagnetic lock and makes the electromagnetic lock rotor adjustable, thereby achieving the independence of assembly between the electromagnetic lock rotors and improving the overall assembly and adjustment processability.

[0027] (3) The present invention places the adjustment gasket between the electromagnetic lock rotor and the shaft sleeve, and only needs to adjust the dimensions at two locations to control the working gap of the electromagnetic lock, thereby improving the air gap debugging efficiency. In addition, the gasket is simple to manufacture, easy to install, highly operable, and easy to adjust, thereby improving the air gap debugging efficiency.

[0028] (4) The present invention places the electromagnetic locking rotor contact position outside the motor, which ensures that the overall structure is miniaturized while allowing intuitive monitoring of the working condition of the electromagnetic lock; making the motor structure miniaturized, highly integrated, and externally monitorable. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is an axonometric view of the motor of the present invention;

[0030] Figure 2 It is a diagram of the structure of the motor of the present invention;

[0031] Figure 3It is a schematic diagram of the measurement dimensions A and B required for gap adjustment of the present invention;

[0032] Figure 4 It is a schematic diagram of the arrangement of the motor outlets of the present invention. DETAILED DESCRIPTION

[0033] The present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0034] like Figure 1 and Figure 2 As shown, the present invention discloses an electromagnetic lock integrated permanent magnet servo motor, comprising: a motor housing 1, a motor stator 2, a motor rotor assembly 3, a bearing I 4, a bearing II 5, a motor end cover 7, an electromagnetic lock 9, an electromagnetic lock rotor 10, a shaft sleeve 11, a key 12 and a locking nut 15; wherein,

[0035] The motor housing 1 is a symmetrical hollow structure with one end open; the motor stator 2 is sleeved on the outside of the motor rotor assembly 3 and is placed in the motor housing 1 together with the motor rotor assembly 3; the axis of the motor rotor assembly 3 coincides with the central axis of the motor housing 1;

[0036] The motor end cover 7 is connected to the end of the motor housing 1;

[0037] One end side wall of the motor rotor assembly 3 is connected to the inner wall of the motor housing 1 through a bearing Ⅰ4; the other end side wall of the motor rotor assembly 3 is connected to the motor end cover 7 through a bearing Ⅱ5;

[0038] The electromagnetic lock 9 is fixedly connected to the motor end cover 7;

[0039] The shaft sleeve 11 is sleeved on one end of the motor rotor assembly 3 near the bearing II 5;

[0040] The electromagnetic lock rotor 10 is installed between the shaft sleeve 11 and the electromagnetic lock 9 , and is fixedly connected to the electromagnetic lock 9 via a locking nut 15 .

[0041] Preferably, a wave washer 6 is also included; along the axial direction of the motor housing 1, the wave washer 6 is placed between the motor housing 1 and the bearing Ⅰ4.

[0042] Preferably, the motor end cover 7 is a symmetrical circular structure; a rotor mounting hole is set at the center of the circle for mounting the motor rotor assembly 3; a bearing chamber is set on the inner wall of the through hole for mounting the bearing II 5; a mounting groove is set on the end surface of the symmetrical circular structure away from the motor housing 1 for mounting the electromagnetic lock 9; a locking through hole is set at the bottom of the mounting groove.

[0043] Preferably, a retaining ring 8 is further included, which is placed in the bearing chamber of the motor end cover 7, and has two sides that are in contact with the bearing II 5 and the electromagnetic locking element 9 respectively.

[0044] Preferably, a key 12 is further included, and a key slot is provided on the contact side of the motor rotor assembly 3 and the shaft sleeve 11 ; the key 12 is placed in the key slot to connect the motor rotor assembly 3 and the shaft sleeve 11 .

[0045] Preferably, it also includes an adjusting gasket 13, which is installed between the electromagnetic lock rotor 10 and the sleeve 11 along the axial direction of the motor rotor assembly 3; the thickness of the adjusting gasket 13 is determined according to the axial length of the electromagnetic lock rotor 10 and the distance from the end face of the electromagnetic lock 9 to the end face of the sleeve 11.

[0046] Preferably, the thickness of the adjusting gasket 13 is determined according to the axial length of the electromagnetic lock rotor 10 and the distance from the end surface of the electromagnetic lock 9 to the end surface of the shaft sleeve 11, specifically:

[0047] Y=A+XB

[0048] Among them, Y is the thickness of the gasket 13, A is the distance from the end surface of the electromagnetic lock 9 to the end surface of the sleeve 11, B is the axial length dimension of the electromagnetic lock rotor 10, and X is the working air gap of the electromagnetic lock.

[0049] Preferably, screws 14 are also included to fix the electromagnetic locking element 9 on the motor end cover 7 .

[0050] Preferably, the electromagnetic locking member 9 is provided with a locking hole corresponding to the locking through hole of the motor end cover 7 ; the screw 14 passes through the locking through hole and the locking hole to fix the electromagnetic locking member 9 on the motor end cover 7 .

[0051] Preferably, a plurality of through holes are evenly distributed on the motor end cover 7 for leading out the motor leads. Figure 4 shown.

[0052] The structure of the electromagnetic lock integrated in the motor is as follows:

[0053] Preparation before electromagnetic lock integration: After heating, the motor housing 1 is installed with the motor stator 2 to form the motor stator assembly. Bearing I4 and bearing II5 are pressed into the motor rotor assembly 3 in sequence to form the motor rotor part. After the wave washer 6 is placed in the motor housing 1, the motor rotor assembly 3 is first placed in the motor end cover 7 to ensure that the bearing and the bearing chamber of the motor end cover 7 are matched, and then the whole is placed in the cavity of the motor stator 2 assembly part to form the motor assembly and prepare for integration.

[0054] Installation of electromagnetic lock: put the retaining ring 8 into the bearing chamber of the motor end cover 7 to ensure the fit and close to the outer ring of the bearing II 5. Then install the electromagnetic lock 9 into the installation hole of the motor end cover 7 to ensure close contact with the surface of the retaining ring 8, and then tighten it with screws 14 to ensure the fixation of the electromagnetic lock 9 and the motor end cover 7.

[0055] Installation of electromagnetic lock rotor: Press the key 12 into the keyway of the motor rotor assembly 3, install the shaft sleeve 11, and ensure that it is close to the inner ring of the bearing II 5. Then install the corresponding adjustment gasket 13 according to the number confirmed after calculating the air gap, and then install the electromagnetic lock rotor 10, and then tighten it with the lock nut 15, using a double nut structure to ensure anti-loosening.

[0056] Electromagnetic lock gap adjustment: Figure 2 As shown, the dimensions A and B need to be measured during the installation of the electromagnetic lock. After the shaft sleeve 11 is installed, the distance dimension A from the end face of the electromagnetic lock 9 to the end face of the shaft sleeve 11 is measured. Before the electromagnetic lock rotor 10 is installed, the axial length dimension B of the electromagnetic lock rotor 10 is measured. According to the formula Y=A+XB (X is the working air gap of the electromagnetic lock, and Y is the required thickness of the gasket 13), the number of gaskets is selected to ensure that the actual air gap of the electromagnetic lock meets the requirements.

[0057] like Figure 3 As shown, due to the compact installation space, the motor end cover 7 is specially provided with four evenly distributed through holes, which are respectively used for leading out the motor leads UVW, the motor thermistor leads PT100+ / PT100-, and the electromagnetic lock leads 24V / GND, so as to ensure the safety of the leads.

[0058] Although the content of the present invention has been described in detail through the above preferred embodiments, it should be appreciated that the above description should not be considered as a limitation of the present invention. After reading the above content, it will be apparent to those skilled in the art that various modifications and substitutions of the present invention will occur. Therefore, the protection scope of the present invention should be limited by the appended claims.

[0059] The contents not described in detail in the specification of the present invention belong to the common knowledge of the professionals in this field.

Claims

1. An electromagnetic lock integrated permanent magnet servo motor, characterized in that: include: A motor housing (1), a motor stator (2), a motor rotor assembly (3), a bearing I (4), a bearing II (5), a motor end cover (7), an electromagnetic lock (9), an electromagnetic lock rotor (10), a shaft sleeve (11), a key (12) and a locking nut (15); wherein: The motor housing (1) is a symmetrical hollow structure with one end open; the motor stator (2) is sleeved outside the motor rotor assembly (3) and is placed in the motor housing (1) together with the motor rotor assembly (3); the axis of the motor rotor assembly (3) coincides with the central axis of the motor housing (1); The motor end cover (7) is connected to the end of the motor housing (1); One end side wall of the motor rotor assembly (3) is connected to the inner wall of the motor housing (1) via a bearing I (4); the other end side wall of the motor rotor assembly (3) is connected to the motor end cover (7) via a bearing II (5); The electromagnetic lock (9) is fixedly connected to the motor end cover (7); The shaft sleeve (11) is sleeved on one end of the motor rotor assembly (3) close to the bearing II (5); The electromagnetic lock rotor (10) is installed between the shaft sleeve (11) and the electromagnetic lock member (9), and is fixedly connected to the electromagnetic lock member (9) via a locking nut (15).

2. The electromagnetic lock integrated permanent magnet servo motor according to claim 1, characterized in that: It also includes a wave washer (6); along the axial direction of the motor housing (1), the wave washer (6) is placed between the motor housing (1) and the bearing I (4).

3. The electromagnetic lock integrated permanent magnet servo motor according to claim 1, characterized in that: The motor end cover (7) is a symmetrical circular structure; a rotor mounting hole is arranged at the center of the circle for mounting the motor rotor assembly (3); a bearing chamber is arranged on the inner wall of the through hole for mounting the bearing II (5); a mounting groove is arranged on the end surface of the symmetrical circular structure away from the motor housing (1) for mounting the electromagnetic locking element (9); and a locking through hole is arranged at the bottom of the mounting groove.

4. The electromagnetic lock integrated permanent magnet servo motor according to claim 3, characterized in that: It also includes a retaining ring (8), which is placed in the bearing chamber of the motor end cover (7), and has two sides that are in contact with the bearing II (5) and the electromagnetic locking element (9) respectively.

5. The electromagnetic lock integrated permanent magnet servo motor according to claim 1, characterized in that: It also includes a key (12), and a key slot is arranged on the contact side between the motor rotor assembly (3) and the shaft sleeve (11); the key (12) is placed in the key slot and is used to connect the motor rotor assembly (3) and the shaft sleeve (11).

6. The electromagnetic lock integrated permanent magnet servo motor according to claim 1, characterized in that: It also includes an adjusting gasket (13) which is installed between the electromagnetic lock rotor (10) and the shaft sleeve (11) along the axial direction of the motor rotor assembly (3); the thickness of the adjusting gasket (13) is determined according to the axial length of the electromagnetic lock rotor (10) and the distance from the end face of the electromagnetic lock (9) to the end face of the shaft sleeve (11).

7. The electromagnetic lock integrated permanent magnet servo motor according to claim 6, characterized in that: The thickness of the adjusting gasket (13) is determined according to the axial length of the electromagnetic lock rotor (10) and the distance from the end surface of the electromagnetic lock (9) to the end surface of the shaft sleeve (11), specifically: Y=A+XB Wherein, Y is the thickness of the gasket (13), A is the distance from the end face of the electromagnetic lock (9) to the end face of the shaft sleeve (11), B is the axial length dimension of the electromagnetic lock rotor (10), and X is the working air gap of the electromagnetic lock.

8. The electromagnetic lock integrated permanent magnet servo motor according to claim 3, characterized in that: It also includes screws (14) for fixing the electromagnetic locking device (9) on the motor end cover (7).

9. The electromagnetic lock integrated permanent magnet servo motor according to claim 8, characterized in that: The electromagnetic locking member (9) is provided with a locking hole corresponding to the locking through hole of the motor end cover (7); the screw (14) passes through the locking through hole and the locking hole to fix the electromagnetic locking member (9) on the motor end cover (7).

10. The electromagnetic lock integrated permanent magnet servo motor according to claim 1, characterized in that: A plurality of through holes are evenly distributed on the motor end cover (7) for leading out the motor leads.

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