Tubular motor

Abstract

The utility model relates to a tubular motor, and belongs to the technical field of motors. One end of the electromagnetic brake is connected with the motor, and the speed reducer is connected with the other end of the electromagnetic brake. The electromagnetic brake comprises an electromagnetic part connected with the motor, a brake shaft arranged on the electromagnetic part in a penetrating mode and connected with the motor, a brake pad arranged on the brake shaft in a sleeving mode, a reset spring and a friction ring capable of abutting against the brake pad, and the brake shaft is fixedly sleeved with the friction ring. The speed reducer comprises a shell and a brake sleeve integrally arranged with the shell, and the friction ring is connected with the brake sleeve in an assembled mode so that the friction ring can not rotate easily when the electromagnetic part acts. The motor and the electromagnetic brake are separately arranged, and when one of the motor and the electromagnetic brake breaks down, the motor or the electromagnetic brake can be independently detached and replaced.

Description

Technical Field

[0001] This application relates to the field of motor technology, and in particular to a tubular motor. Background Technology

[0002] Electromagnetic brakes, also known as electromagnetic brakes, are commonly used braking components in motors and other mechanical equipment. Their function is to quickly cut off power to the rotating target body after receiving a braking command from the system, thereby braking the system and ensuring its safety.

[0003] In related technologies, electromagnetic brakes include a magnetic yoke, coil, spring, armature, rotor friction plate, rotor hub, support column, and limiting plate. The braking principle is as follows: the system issues a braking command, cutting off the current in the electromagnetic brake windings. The electromagnetic field and force disappear, and the axial force originally applied to the armature by the spring causes the armature to quickly disengage from the magnetic yoke, pushing the friction plate between the armature and the limiting plate until they are pressed together. The frictional torque generated between the armature, rotor friction, and the limiting plate causes the originally high-speed rotor to stop quickly.

[0004] Regarding the aforementioned technologies, many electromagnetic brakes are manufactured together with the motor, meaning the electromagnetic brake is located inside the motor housing. Therefore, when any component inside the motor (such as the stator, rotor, etc.) or one of the electromagnetic brakes fails, the entire motor needs to be replaced, resulting in a waste of resources. Utility Model Content

[0005] In order to separate the motor and the electromagnetic brake, this application provides a tubular motor.

[0006] The tubular motor provided in this application adopts the following technical solution:

[0007] A tubular motor includes a motor, an electromagnetic brake connected to one end of the motor, and a reducer connected to the other end of the electromagnetic brake. The electromagnetic brake includes an electromagnetic part connected to the motor, a brake shaft passing through the electromagnetic part and connected to the motor, a brake pad sleeved on the brake shaft, a return spring, and a friction ring that can abut against the brake pad. The friction ring is fixedly sleeved on the brake shaft. The reducer includes a housing and a brake sleeve integrally formed with the housing. The friction ring is fitted and connected to the brake sleeve so that the friction ring is not easily rotated when the electromagnetic part is activated.

[0008] By adopting the above technical solution, the electromagnetic brake is connected to the motor housing through the electromagnetic part, enabling motors that previously did not have an electromagnetic brake to be equipped with one and to have the function of an electromagnetic brake. At the same time, since the motor and the electromagnetic brake are set separately, when either the motor or the electromagnetic brake fails, the motor or the electromagnetic brake can be removed and replaced separately.

[0009] In addition, in other products, the brake sleeve is generally located in the electromagnetic brake and is connected to the housing of the reducer through the electromagnetic brake. In this application, the brake sleeve is integrated with the housing of the reducer. It can also be regarded as a part of the housing of the reducer being the brake sleeve. In this way, the brake sleeve can be reduced in the production and assembly process, thereby reducing costs.

[0010] Optionally, the brake sleeve has a groove, and the friction ring has a retaining block that is embedded in the groove.

[0011] By adopting the above technical solution, when the electromagnetic brake and reducer are installed, the friction ring is coaxially inserted into the brake sleeve, and the locking block is embedded in the locking groove. Through the cooperation between the locking block and the groove wall, the friction ring is not easy to rotate.

[0012] Optionally, the slot extends through the inner and outer walls of the brake sleeve.

[0013] By adopting the above technical solution, during installation, when the friction ring is inserted into the brake sleeve from one end, the locking block also enters the locking groove until the friction ring is installed in place. Since the locking groove penetrates the inner and outer walls of the brake sleeve, when the locking block is small, the locking block can be fully inserted into the locking groove, thereby increasing the contact area between the locking block and the groove wall, and thus increasing the resistance that the brake sleeve provides to the friction ring.

[0014] Optionally, the inner wall of the brake sleeve is provided with a fixing block, and a slot is formed between two fixing blocks for the locking block to be inserted.

[0015] By adopting the above technical solution, compared with the method where the slot penetrates the inner and outer walls of the brake sleeve, the brake sleeve has a more stable overall structure and is less prone to deformation because no slot is made on the side wall of the brake sleeve.

[0016] Optionally, the inner wall of the brake sleeve is further provided with an inner groove for the end of the locking block to be inserted.

[0017] By adopting the above technical solution, during installation, the friction ring is inserted into the brake sleeve from one end, and at the same time, the locking block moves into the slot until the friction ring is installed in place. At this time, the locking block is embedded in the slot, and the end of the locking block is embedded in the inner groove.

[0018] Optionally, the motor housing has a mounting hole, and the electromagnetic part is provided with a mounting screw that screws into the mounting hole.

[0019] By adopting the above technical solution, when installing the electromagnetic part and the motor, the mounting screw passes through the electromagnetic part and is inserted into the mounting hole. The electromagnetic part and the motor are connected by the mounting screw, which facilitates the installation and disassembly of the motor and the electromagnetic braking part.

[0020] Optionally, the brake pad has a protective tube extending toward the electromagnetic part, and the protective tube is sleeved around the return spring.

[0021] By adopting the above technical solution, the return spring is less likely to be touched by other components through the protective tube, thereby improving the service life of the return spring.

[0022] Optionally, the brake pad has a contact ring protruding from the inner ring sidewall, and the end of the return spring abuts against the contact ring.

[0023] By adopting the above technical solution, the end of the return spring abuts against the contact ring, so that the return spring is located between the protective tube and the brake shaft.

[0024] In summary, this application includes at least one of the following beneficial technical effects:

[0025] Because the motor and electromagnetic brake are set separately, when either the motor or the electromagnetic brake fails, the motor or the electromagnetic brake can be removed and replaced separately. In other products, the brake sleeve is generally located on the electromagnetic brake and connected to the reducer housing through the brake sleeve of the electromagnetic brake. In this application, the brake sleeve is integrated with the reducer housing, which can also be regarded as a part of the reducer housing being the brake sleeve. This reduces the number of brake sleeve parts in the production and assembly process, thus lowering costs. Compared with the slot penetrating the inner and outer walls of the brake sleeve, the absence of slots on the side walls of the brake sleeve and the use of fixing blocks inside the brake sleeve make the overall structure of the brake sleeve more stable and less prone to deformation. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of the tubular motor according to an embodiment of this application.

[0027] Figure 2 This is an exploded view of the tubular motor according to an embodiment of this application.

[0028] Figure 3 This is a cross-sectional view of the brake shaft according to an embodiment of this application.

[0029] Figure 4 This is an exploded view of the friction ring and the reducer housing in another embodiment of this application.

[0030] Explanation of reference numerals in the attached drawings: 1. Motor; 11. Mounting hole; 2. Electromagnetic brake; 21. Electromagnetic part; 22. Brake shaft; 23. Brake pad; 231. Protective tube; 232. Contact ring; 24. Return spring; 25. Friction ring; 251. Locking block; 3. Reducer; 31. Housing; 32. Brake sleeve; 33. Slot; 34. Fixing block; 35. Inner groove; 4. Mounting screw. Detailed Implementation

[0031] The present application will be further described in detail below with reference to the accompanying drawings.

[0032] This application discloses a tubular motor.

[0033] Reference Figure 1 The tubular motor includes a motor 1, an electromagnetic brake 2 and a reducer 3. The electromagnetic brake 2 is located between the motor 1 and the reducer 3, and its two ends are connected to the motor 1 and the reducer 3 respectively.

[0034] See Figure 1 and Figure 2 Specifically, the electromagnetic brake 2 includes an electromagnetic part 21, a brake shaft 22, a brake pad 23, a return spring 24, and a friction ring 25. The electromagnetic part 21 is cylindrical and has a coil installed inside. When the coil is energized, the electromagnetic part 21 generates magnetic force. The electromagnetic part 21 has a through hole at its axis that passes through its upper and lower end faces. The brake shaft 22 passes through the through hole, so that the brake shaft 22 and the electromagnetic part 21 are coaxially arranged. The outer wall of the brake shaft 22 has a gap with the wall of the through hole, so that the brake shaft 22 can rotate relative to the electromagnetic part 21.

[0035] The motor 1 has a mounting hole 11 on the end face with the output shaft, and the electromagnetic part 21 is provided with a mounting screw 4. When the electromagnetic part 21 is installed with the motor 1, the mounting screw 4 passes through the electromagnetic part 21 and is inserted into the mounting hole 11, and the electromagnetic part 21 is connected to the motor 1 by the mounting screw 4.

[0036] One end of the brake shaft 22 is connected to the output shaft of the motor 1, and the other end is connected to the rotating shaft inside the reducer 3, so that after the motor 1 starts, the motor 1 can drive the brake shaft 22 to rotate, and the brake shaft 22 drives the rotating shaft of the reducer 3 to rotate.

[0037] The brake pad 23 is annular and made of magnetic metal, and can be attracted by the electromagnetic part 21 when energized; the brake pad 23 is coaxial and rotatably mounted on the brake shaft 22.

[0038] The return spring 24 is coaxially sleeved on the brake shaft 22, and its two ends abut against the brake pad 23 and the electromagnetic part 21, respectively. To protect the return spring 24, a protective tube 231 extends from the brake pad 23 toward the electromagnetic part 21. The protective tube 231 is sleeved on the outside of the return spring 24, making it less likely for the return spring 24 to be touched by other parts, thereby improving the service life of the return spring 24.

[0039] See Figure 2 and Figure 3 To facilitate the contact between the brake pad 23 and the return spring 24, a contact ring 232 is provided on the inner ring side wall of the brake pad 23, and the end of the return spring 24 abuts against the contact ring 232.

[0040] The friction ring 25 is fixedly sleeved on the brake shaft 22 and located on the side of the brake pad 23 away from the electromagnetic part 21. Since it needs to abut against the brake pad 23 and generate friction, the friction ring 25 in this embodiment is made of silicone or rubber material.

[0041] The reducer 3 includes a housing 31 and a brake sleeve 32. The housing 31 is equipped with components such as a rotating shaft and a reduction gear. The brake sleeve 32 is integrally formed with the housing 31. The brake sleeve 32 is assembled and connected to the friction ring 25, making it difficult for the friction ring 25 to rotate.

[0042] In detail, the brake sleeve 32 has a groove 33, and the outer peripheral wall of the friction ring 25 is integrally formed with a retaining block 251 that is embedded in the groove 33. During installation, the friction ring 25 is coaxially inserted into the brake sleeve 32, and the retaining block 251 is embedded in the groove 33. Through the cooperation between the retaining block 251 and the groove wall of the groove 33, the friction ring 25 is not easy to rotate.

[0043] In this embodiment, the slot 33 penetrates the inner and outer walls of the brake sleeve 32, and the slot 33 communicates with the end of the brake sleeve 32 near the motor 1. During installation, when the friction ring 25 is inserted into the brake sleeve 32 from one end, the locking block 251 also enters the slot 33 until the friction ring 25 is installed in place.

[0044] See Figure 4 In another embodiment, the inner wall of the brake sleeve 32 is fixedly connected with a plurality of fixing blocks 34, which are arranged in pairs, with a slot 33 between adjacent fixing blocks 34 for the insertion of the locking block 251. Additionally, the inner wall of the brake sleeve 32 is provided with a plurality of inner grooves 35 for the insertion of the end of the locking block 251. The number of inner grooves 35 is the same as the number of slots 33 and they correspond one-to-one. The inner grooves 35 are connected to the slots 33. During installation, the friction ring 25 is inserted into the brake sleeve 32 from one end, and simultaneously the locking block 251 moves into the slot 33 until the friction ring 25 is in place. At this point, the locking block 251 is inserted into the slot 33, and the end of the locking block 251 is inserted into the inner groove 35.

[0045] The implementation principle of a tubular motor in this application embodiment is as follows: Under normal conditions, the brake pad 23 abuts against the friction ring 25 under the action of the return spring 24. Through the action of the friction ring 25, the brake pad 23 is not easy to rotate, thereby making it difficult for the rotating shaft to rotate. When the motor starts, the electromagnetic part 21 is energized and attracts the brake pad 23, causing the brake pad 23 to separate from the friction ring 25, thereby enabling the rotating shaft to rotate, and then causing the rotating shaft to drive the rotating shaft of the reducer 3 to rotate.

[0046] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A tubular electric machine characterized by: The application relates to a motor (1), an electromagnetic brake (2) connected with one end of the motor (1) and a speed reducer (3) connected with the other end of the electromagnetic brake (2); the electromagnetic brake (2) comprises an electromagnetic part (21) connected with the motor (1), a brake shaft (22) penetrating through the electromagnetic part (21) and connected with the motor (1), a brake pad (23) sleeved on the brake shaft (22), a return spring (24) and a friction ring (25) capable of abutting against the brake pad (23); the friction ring (25) is fixedly sleeved on the brake shaft (22); the speed reducer (3) comprises a shell (31) and a brake sleeve (32) integrally arranged on the shell (31); the friction ring (25) is assembled with the brake sleeve (32) so that the friction ring (25) is not easy to rotate when the electromagnetic part (21) operates.

2. A tubular electric machine according to claim 1, characterized in that: The brake sleeve (32) is provided with a clamping groove (33), and the friction ring (25) is provided with a clamping block (251) embedded in the clamping groove (33).

3. A tubular electric machine according to claim 2, characterised in that: The clamping groove (33) penetrates through the inner and outer sidewalls of the brake sleeve (32).

4. A tubular electric machine according to claim 2, characterised in that: The inner wall of the brake sleeve (32) is provided with fixing blocks (34), and the clamping groove (33) for embedding the clamping block (251) is formed between the two fixing blocks (34).

5. A tubular electric machine according to claim 4, characterised in that: The inner wall of the brake sleeve (32) is further provided with an inner recess (35) for embedding the end of the clamping block (251).

6. A tubular electric machine according to claim 1, characterized in that: The shell (31) of the motor (1) is provided with a mounting hole (11), and the electromagnetic part (21) is provided with a mounting screw (4) screwed into the mounting hole (11).

7. A tubular electric machine as claimed in claim 1, characterized in that: The brake pad (23) extends a protection pipe (231) towards the electromagnetic part (21), and the protection pipe (231) is sleeved on the return spring (24).

8. A tubular electric machine as claimed in claim 1, characterized in that: The brake pad (23) is provided with a contact ring (232) on the inner ring sidewall, and the end of the return spring (24) abuts against the contact ring (232).

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