Fan self-cooling, disc electromagnetic brake variable frequency speed regulating motor

Abstract

The utility model relates to a fan self-cooling, disc electromagnetic brake variable frequency speed regulating motor, including a rotating shaft, a flange end cover, a rotor, a stator, a junction box, a base, a rear end cover, a fan, a brake end cover, a spline shaft, a friction plate, a brake protective cover, a support bolt, a moving magnet, an electromagnet, an encoder, an encoder protective cover, a pressure spring, an air inlet protective net and a double-headed screw. The utility model product improves the protection level of the motor, the electromagnet and the encoder, improves the reliability of the motor operation, reduces the failure points, and reduces the maintenance and repair costs; in the production process, the fan cooling is adopted to cancel the forced air cooling of the fan, and the production cost is reduced; in the use process, the variable frequency speed regulating motor can realize smooth stepless speed regulation, which can reduce the impact on the reducer gear, increase the service life of the reducer, and reduce the maintenance cost of the reducer.

Description

Technical Field

[0001] The utility model belongs to the technical field of electric motors and specifically discloses a fan self-cooling, disc-type electromagnetic brake variable frequency speed regulating electric motor. Background Art

[0002] Disc electromagnetic brake variable frequency speed regulating motors are widely used in industry. For disc electromagnetic brake motors used in some machines that are used outdoors and need to withstand wind, rain and dust, such as tower cranes, port machinery, gantry cranes and other outdoor machines, there are two motor structural designs in the prior art: one is an internal ventilation cooling structure with an IP23 protection type for the motor; the other is an external ventilation cooling structure with an IP55 protection type for the motor, the electromagnetic brake part and the encoder are IP23 protected, and the brake and encoder are installed in a wind hood with an axial flow fan or a backpack centrifugal fan. Both of these structural forms have protection defects to varying degrees, with many failure points and a high failure rate. In order to ensure the safe and reliable operation of the machinery with a low failure rate, it is necessary to improve the traditional structural design in terms of rainproof, moisture-proof, dust-proof, ventilation and cooling of the motor windings and brakes, and reduce the number of fault points. The electromagnetic design and structural design of this motor meet the protection of the motor windings, brakes, and encoders against rain, moisture, and dust, and the protection type is IP55. On the other hand, it also meets the temperature rise index requirements for ventilation and cooling of the motor, and in the application of disc electromagnetic brake variable frequency speed regulation motors used outdoors, the fault points caused by cooling fans are reduced. Summary of the invention

[0003] The utility model aims to overcome the deficiencies in the prior art and provide a fan self-cooling, disc-type electromagnetic brake variable frequency speed regulating motor.

[0004] According to the technical solution provided by the utility model, the fan self-cooling, disc electromagnetic brake variable frequency speed regulating motor includes a rotating shaft, a flange end cover, a rotor, a stator, a terminal box, a base, a rear end cover, a fan, a brake end cover, a spline shaft, a friction plate, a brake protective cover, a support bolt, a moving magnet, an electromagnet, an encoder, an encoder protective cover, a pressure spring, an air inlet protective net and a double-headed screw;

[0005] A junction box is fixed on the base, a stator is fixed inside the base, a flange end cover and a rear end cover are respectively fastened to the left end and the right end of the base through four double-headed screws and nuts and spring washers matched with the double-headed screws, a ventilation duct is provided inside the rear end cover, the rotating shaft is rotatably installed inside the flange end cover and the rear end cover, the left end of the rotating shaft extends out of the flange end cover, and a rotor is fixed on the iron core stop of the rotating shaft located in the base;

[0006] A brake end cover is fixed to the right end of the rear end cover, an air inlet is provided on the brake end cover, an air inlet protection net is fixed to the brake end cover at the air inlet position, a fan is fixed to the rotating shaft close to the air inlet protection net, a brake protective cover is fixed to the right end of the brake end cover, and an encoder protective cover is fixed to the right end of the brake protective cover;

[0007] At least three support bolt mounting holes are provided on the brake end cover, a support bolt is fixed in each support bolt mounting hole, a moving magnet mounting hole is provided on the moving magnet, the moving magnet is slidably mounted on the support bolt through the moving magnet mounting hole, an electromagnet mounting hole is provided on the electromagnet, the electromagnet is mounted on the support bolt through the electromagnet mounting hole and fixed to the right end of the support bolt through a nut matched with the support bolt, and a pressure spring is provided between the electromagnet and the moving magnet;

[0008] A friction surface is provided on the right end surface of the brake end cover, and a friction surface is provided on the left end surface of the moving magnet. A spline shaft is fixed on the rotating shaft between the friction surface of the brake end cover and the friction surface of the moving magnet. The friction plate is installed on the spline shaft through its inner spline hole, and the friction plate can slide freely on the spline shaft.

[0009] The right end of the rotating shaft extends into the encoder protection cover, and the encoder is installed on the rotating shaft through its shaft hole and then fixed on the electromagnet with bolts through the mounting ears.

[0010] Preferably, a first bearing is provided in the flange end cover, a bearing outer cover is fixed to the left end of the flange end cover, a first dust ring is provided in the bearing outer cover, and a bearing inner cover is fixed to the right end of the flange end cover.

[0011] Preferably, a second dust ring is provided in the brake end cover.

[0012] Preferably, a second bearing, a corrugated spring washer and a third dust ring are sequentially arranged from left to right in the rear end cover, the second bearing and the third dust ring are arranged at intervals, and the right end face of the outer ring of the second bearing contacts with the left end face of the corrugated spring washer.

[0013] Preferably, an O-ring capable of sealing between the brake end cover and the brake protective cover is provided on the outer circle of the brake end cover.

[0014] Preferably, a spring positioning pin is inserted into the electromagnet, a pressure spring is installed on the spring positioning pin, and the left end of the pressure spring extends into a recess formed on the right end surface of the moving magnet.

[0015] Preferably, the spline shaft is installed on the rotating shaft through a flat key and a conical surface, and then fastened to the rotating shaft through a bushing, a butterfly spring washer, a round nut and a stop washer.

[0016] Preferably, the fan is fixed on the rotating shaft via a keyway on the rotating shaft and a shaft elastic retaining ring.

[0017] Preferably, the stator has a suspension bracket.

[0018] Preferably, the invention further comprises at least three lifting rings, wherein the two stud screws at the upper part are penetrated with the lifting rings and the lifting rings are fixed to the stud screws by nuts matched with the stud screws.

[0019] Compared with the prior art, the utility model has the following advantages:

[0020] 1. The utility model product improves the protection level of the motor, electromagnet and encoder, improves the reliability of the motor operation, reduces the failure points, and reduces the maintenance and repair costs;

[0021] 2. In the production process, fan cooling is used to cancel the forced air cooling of the fan, which reduces the production cost;

[0022] 3. During use, the use of variable frequency speed regulating motor can achieve smooth stepless speed regulation, which can reduce the impact on the reducer gears, increase the service life of the reducer, and reduce the maintenance cost of the reducer. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is the front view of the utility model.

[0024] Figure 2 It is a left view of the utility model.

[0025] Figure 3 yes Figure 1 AA section view.

[0026] Figure 4 yes Figure 1 Magnified view of part B. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0028] The utility model is a fan self-cooling, disc-type electromagnetic brake variable frequency speed regulating motor, such as Figure 1-4As shown, it includes a rotating shaft 2, a flange end cover 6, a rotor 7, a stator 8, a terminal box 9, a base 10, a rear end cover 12, a fan 13, a brake end cover 14, a spline shaft 16, a friction plate 18, a brake protective cover 19, a support bolt 20, a moving magnet 21, an electromagnet 22, an encoder 23, an encoder protective cover 24, a pressure spring 27, an air inlet protective net 31 and a double-headed screw 35;

[0029] A terminal box 9 is fixed on the base 10, a stator 8 is fixed inside the base 10, a flange end cover 6 and a rear end cover 12 are respectively fastened to the left end and the right end of the base 10 by at least three double-headed screws 35 and nuts and spring washers matched with the double-headed screws 35, a ventilation duct 12.1 is provided inside the rear end cover 12, the rotating shaft 2 is rotatably mounted inside the flange end cover 6 and the rear end cover 12, the left end of the rotating shaft 2 extends out of the flange end cover 6, and a rotor 7 is fixed on the iron core stop of the rotating shaft 2 located inside the base 10;

[0030] A brake end cover 14 is fixed to the right end of the rear end cover 12, an air inlet is provided on the brake end cover 14, an air inlet protection net 31 is fixed to the brake end cover 14 at the air inlet position, a fan 13 is fixed to the rotating shaft 2 near the air inlet protection net 31, a brake protection cover 19 is fixed to the right end of the brake end cover 14, and an encoder protection cover 24 is fixed to the right end of the brake protection cover 19;

[0031] At least three support bolt mounting holes are provided on the brake end cover 14, and a support bolt 20 is fixed in each support bolt mounting hole. A moving magnet mounting hole is provided on the moving magnet 21, and the moving magnet 21 is slidably mounted on the support bolt 20 through the moving magnet mounting hole. An electromagnet mounting hole is provided on the electromagnet 22, and the electromagnet 22 is mounted on the support bolt 20 through the electromagnet mounting hole and fixed to the right end of the support bolt 20 through a nut matched with the support bolt 20, and a pressure spring 27 is provided between the electromagnet 22 and the moving magnet 21;

[0032] A friction surface is provided on the right end surface of the brake end cover 14, and a friction surface is provided on the left end surface of the moving magnet 21. A spline shaft 16 is fixed on the rotating shaft 2 between the friction surface of the brake end cover 14 and the friction surface of the moving magnet 21. The friction plate 18 is installed on the spline shaft 16 through its inner spline hole, and the friction plate 18 can slide freely on the spline shaft 16.

[0033] The right end of the rotating shaft 2 extends into the encoder protective cover 24, and the encoder 23 is installed on the rotating shaft 2 through its shaft hole, and then fixed on the electromagnet 22 with bolts through the mounting ears.

[0034] A first bearing 5 is provided in the flange end cover 6 , a bearing outer cover 4 is fixed to the left end of the flange end cover 6 , a first dust ring 3 is provided in the bearing outer cover 4 , and a bearing inner cover 1 is fixed to the right end of the flange end cover 6 .

[0035] A second dust seal 15 is provided in the brake end cover 14 .

[0036] A second bearing 11 , a corrugated spring washer 34 and a third dust ring 33 are sequentially arranged from left to right in the rear end cover 12 . The second bearing 11 and the third dust ring 33 are arranged at intervals, and the right end face of the outer ring of the second bearing 11 contacts the left end face of the corrugated spring washer 34 .

[0037] An O-ring 17 is provided on the outer circumference of the brake end cover 14 to seal between the brake end cover 14 and the brake protective cover 19 .

[0038] A spring positioning pin 28 is inserted into the electromagnet 22 , and a pressure spring 27 is installed on the spring positioning pin 28 . The left end of the pressure spring 27 extends into a recess formed on the right end surface of the moving magnet 21 .

[0039] The spline shaft 16 is installed on the rotating shaft 2 through a flat key and a conical surface, and is then fastened to the rotating shaft 2 through a bushing 30 , a butterfly spring washer 29 , a round nut 25 and a stop washer 26 .

[0040] The fan 13 is fixed on the rotating shaft 2 through a keyway on the rotating shaft 2 and a shaft elastic retaining ring 32 .

[0041] The stator 8 has a suspension bracket 36 .

[0042] The invention also comprises at least three lifting rings 37 , into which the two stud screws 35 at the upper part are inserted and the lifting rings 37 are fixed to the stud screws 35 by nuts matched with the stud screws 35 .

[0043] During assembly of the utility model, the stator 8 is embedded with the motor coil winding and installed in the base 10 after being insulated, and then the terminal box 9 is installed on the base 10 and the wiring is installed with the terminal board and the hanging 36 to form a stator assembly; the rotor 7 is installed on the core block of the rotating shaft 2, and the outer circle of the rotor is processed and balanced. The bearing inner cover 1 is first installed at the shaft extension end on the left side of the rotating shaft 2, and then the first bearing 5 is installed. The second bearing 11 is installed at the other end of the rotating shaft 2 to form a rotor assembly; the rotor assembly is installed together with the flange end cover 6 through the first bearing 5, and then the rotor assembly is installed together with the stator assembly through the inner hole of the stator 8, and then the rear end cover 12 is installed. After placing the corrugated spring washer 34 and installing the air inlet protective cover 31, install them on the second bearing 11 and match them with the stopper of the base. Then insert four double-headed screws 35 into the mounting holes of the flange end cover 6 and the rear end cover 12. Pass the two double-headed screws 35 on the upper part through the lifting rings 37 and tighten them with nuts. Then use the nuts and spring washers matching the double-headed screws 35 to fasten the flange end cover 6 and the rear end cover 12 to the base 10 to ensure that the shaft 2 can rotate freely. The fan 13 is fixed to the shaft 2 through the keyway on the shaft 2 and the shaft with an elastic retaining ring 32. The dust ring 15 is installed in the inner hole of the brake end cover 14 and assembled on the shaft 2. The brake end cover 1 4 is fixed to the rear end cover 12 by bolts; the support bolt 20 is fixed to the mounting hole on the brake end cover 14 by nuts and spring washers matched with the support bolt 20; the spline shaft 16 is installed on the rotating shaft 2 by flat keys and cones, and then fastened to the rotating shaft 2 by bushings 30, butterfly spring washers 29, round nuts 25, and stop washers 26; the friction plate 18 is installed on the spline shaft 16 by its internal splines and can slide freely in the axial direction; the moving magnet 21 is installed on the support bolt 20 by its three moving magnet mounting holes, and the moving magnet 21 must slide freely in the axial direction of the support bolt 20; the electromagnet 22 is fixed to the support bolt 20 by nuts matched with the support bolt 20 It is installed and fixed on the right end of the supporting bolt 20. During installation, the pressure spring 27 and the spring positioning pin 28 are first installed between the moving magnet 21 and the electromagnet 22, and then the suction gap between the moving magnet 21 and the electromagnet 22 is adjusted and pressed and fixed with the adjusting nut and the fastening nut; the encoder 23 is installed on the rotating shaft 2 through its axial hole, and then fixed to the electromagnet 22 with bolts through the mounting ears; the sealing ring 17 is installed on the brake end cover 14, and the inner circle of the brake protective cover 19 is installed on the brake end cover 14, and then fixed to the electromagnet 22 with bolts; the encoder protective cover 24 is installed at the specified position and fastened to the electromagnet 22 with bolts.

[0044] The base 10, the flange end cover 6 and the rear end cover 12 are fastened together by means of double-headed screws 35, nuts and spring washers matching the double-headed screws 35. A lifting ring 37 is provided on the upper two screws 35 near the mounting holes of the flange end cover 6 and the rear end cover to facilitate lifting and ensure the horizontality of the B5 motor lifting, thus facilitating the connection and installation of the motor and the reducer.

[0045] The rotating shaft 2 is rotatably supported on the flange end cover 6 through the first bearing 5, and the axial movement of the rotor assembly is limited by the bearing inner cover 1 and the bearing outer cover 4; a wave washer 34 is arranged between the second bearing 11 and the rear end cover 12.

[0046] A fan 13 is installed between the rear end cover 12 and the brake end cover 14. An air inlet and an air inlet protective cover 31 are installed on the brake end cover 14. When the motor is powered on and rotates, the fan 13 also rotates, and air enters from the air inlet of the brake end cover 14. The wind generated by the rotation of the fan 13 passes through Figure 3 The air duct shown blows onto the cooling blades on the outer circumference of the base 10 to cool the outer surface of the motor.

[0047] A first dustproof ring 3 is arranged between the bearing outer cover 4 and the rotating shaft 2 , and a third dustproof ring 32 is arranged between the rear end cover 12 and the rotating shaft 2 . The first dustproof ring 3 and the third dustproof ring 32 can prevent dust and rainwater from entering the machine base 10 .

[0048] A second dustproof ring 15 is provided between the brake end cover 14 and the rotating shaft 2 to prevent dust and rainwater brought by the air inlet from entering the brake part, thereby ensuring safe and reliable operation of the brake.

[0049] A sealing ring 17 is provided between the brake end cover 14 and the brake protective cover 19 to prevent dust and rainwater from entering the brake.

[0050] The brake end cover 14 and the moving magnet 21 are provided with friction surfaces. Under the pressure of the pressure spring 27, the friction plate 18 generates friction with the friction surface, thereby generating a braking torque.

[0051] The rear end of the rotating shaft 2 is designed with a shaft stop connected to the encoder 23. An encoder protection cover 24 is provided outside the encoder 23 to prevent dust and rainwater from entering the encoder, thereby ensuring safe and reliable operation of the encoder.

[0052] The working principle of the utility model is as follows:

[0053] The flange end cover 6 is connected to the reducer by bolts and stoppers, and then a gear is installed at the shaft extension of the rotating shaft 2 to engage with the gear in the reducer. When the motor is energized, the disc brake is energized at the same time, and the electromagnet 22 generates a magnetic field, so that the moving magnet 21 overcomes the spring pressure and is attracted to the electromagnet 22. At this time, the motor rotates, the rotating shaft 2 drives the reducer to rotate, and the motor is speed-regulated by the frequency converter; an encoder 23 is installed at the rear end of the motor, and the encoder 23 feeds back a signal to the frequency converter according to the motor speed, so that the motor can stably work at the required working speed or adjust the speed; when the motor rotates, the rotating shaft 2 drives the fan 13 to rotate together, and the cooling air enters from the air inlet protective cover. The fan 13 rotates driven by the rotating shaft 2 to generate air volume and air pressure, and then passes through Figure 3 The ventilation duct shown blows toward the outer surface of the motor to cool the motor; when the motor needs to stop rotating, it can be adjusted to the lowest speed through the frequency converter, and the motor and the brake are powered off at the same time. At this time, the electromagnet loses its magnetic field force after power is cut off, and the pressure of the pressure spring will press the moving magnet 21. The friction surface of the moving magnet 21 and the brake end cover 14 and the friction plate 18 generate a braking torque under the action of the spring pressure, which makes the motor stop quickly. The braking torque is greater than the torque transmitted to the motor end by the hoisted weight; in addition, when the system is powered off during operation, the motor and the brake will automatically perform the above-mentioned braking shutdown action.

[0054] Finally, it should be noted that the above specific implementation methods are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to examples, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A fan-cooled, disc-type electromagnetic brake variable frequency speed regulating motor, comprising a rotating shaft (2), a flange end cover (6), a rotor (7), a stator (8), a terminal box (9), a base (10), a rear end cover (12), a fan (13), a brake end cover (14), a spline shaft (16), a friction plate (18), a brake protective cover (19), a support bolt (20), a moving magnet (21), an electromagnet (22), an encoder (23), an encoder protective cover (24), a pressure spring (27), an air inlet protective net (31) and a double-headed screw (35); Its characteristics are: A terminal box (9) is fixed on the machine base (10), a stator (8) is fixed in the machine base (10), a flange end cover (6) and a rear end cover (12) are respectively fastened to the left end and right end of the machine base (10) by at least four double-headed screws (35) and nuts and spring washers matched with the double-headed screws (35), a ventilation duct (12.1) is provided in the rear end cover (12), the rotating shaft (2) is rotatably mounted in the flange end cover (6) and the rear end cover (12), the left end of the rotating shaft (2) protrudes from the flange end cover (6), and a rotor (7) is fixed on the iron core stop of the rotating shaft (2) located in the machine base (10); A brake end cover (14) is fixed to the right end of the rear end cover (12), an air inlet is provided on the brake end cover (14), an air inlet protection net (31) is fixed to the brake end cover (14) at the air inlet position, a fan (13) is fixed to the rotating shaft (2) near the air inlet protection net (31), a brake protection cover (19) is fixed to the right end of the brake end cover (14), and an encoder protection cover (24) is fixed to the right end of the brake protection cover (19); At least three support bolt mounting holes are provided on the brake end cover (14), a support bolt (20) is fixed in each support bolt mounting hole, a moving magnet mounting hole is provided on the moving magnet (21), the moving magnet (21) is slidably mounted on the support bolt (20) through the moving magnet mounting hole, an electromagnet mounting hole is provided on the electromagnet (22), the electromagnet (22) is mounted on the support bolt (20) through the electromagnet mounting hole and is fixed to the right end of the support bolt (20) by a nut matched with the support bolt (20), and a pressure spring (27) is provided between the electromagnet (22) and the moving magnet (21); A friction surface is provided on the right end surface of the brake end cover (14), and a friction surface is provided on the left end surface of the moving magnet (21). A spline shaft (16) is fixed on the rotating shaft (2) between the friction surface of the brake end cover (14) and the friction surface of the moving magnet (21). The friction plate (18) is mounted on the spline shaft (16) through its inner spline hole. The friction plate (18) can slide freely on the spline shaft (16). The right end of the rotating shaft (2) extends into the encoder protective cover (24), and the encoder (23) is installed on the rotating shaft (2) through its shaft hole, and then fixed to the electromagnet (22) with bolts through the mounting ears.

2. The fan-cooled, disc-type electromagnetic brake variable frequency speed regulating motor according to claim 1, characterized in that: A first bearing (5) is provided in the flange end cover (6), a bearing outer cover (4) is fixed to the left end of the flange end cover (6), a first dust ring (3) is provided in the bearing outer cover (4), and a bearing inner cover (1) is fixed to the right end of the flange end cover (6).

3. The fan-cooled, disc-type electromagnetic brake variable frequency speed regulating motor according to claim 1, characterized in that: A second dustproof ring (15) is provided inside the brake end cover (14).

4. The fan-cooled, disc-type electromagnetic brake variable frequency speed regulating motor according to claim 1, characterized in that: A second bearing (11), a corrugated spring washer (34) and a third dustproof ring (33) are sequentially arranged in the rear end cover (12) from left to right. The second bearing (11) and the third dustproof ring (33) are arranged at intervals, and the right end surface of the outer ring of the second bearing (11) contacts the left end surface of the corrugated spring washer (34).

5. The fan-cooled, disc-type electromagnetic brake variable frequency speed regulating motor according to claim 1, characterized in that: An O-type sealing ring (17) capable of sealing between the brake end cover (14) and the brake protective cover (19) is provided on the outer circumference of the brake end cover (14).

6. The fan-cooled, disc-type electromagnetic brake variable frequency speed regulating motor according to claim 1, characterized in that: A spring positioning pin (28) is inserted into the electromagnet (22), and a pressure spring (27) is installed on the spring positioning pin (28). The left end of the pressure spring (27) extends into a recess formed on the right end surface of the moving magnet (21).

7. The fan-cooled, disc-type electromagnetic brake variable frequency speed regulating motor according to claim 1, characterized in that: The spline shaft (16) is mounted on the rotating shaft (2) via a flat key and a conical surface, and is then fastened to the rotating shaft (2) via a bushing (30), a butterfly spring washer (29), a round nut (25) and a stop washer (26).

8. The fan-cooled, disc-type electromagnetic brake variable frequency speed regulating motor according to claim 1, characterized in that: The fan (13) is fixed on the rotating shaft (2) via a keyway on the rotating shaft (2) and a shaft elastic retaining ring (32).

9. The fan-cooled, disc-type electromagnetic brake variable frequency speed regulating motor according to claim 1, characterized in that: The stator (8) has a suspension bracket (36).

10. The fan-cooled, disc-type electromagnetic brake variable frequency speed regulating motor according to claim 1, characterized in that: The invention also comprises at least three lifting rings (37), wherein the two stud screws (35) at the upper part are penetrated with the lifting rings (37) and the lifting rings (37) are fixed to the stud screws (35) by nuts matched with the stud screws (35).

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