Explosion-proof servo motor

Abstract

The utility model relates to an explosion-proof servo motor, and relates to the field of motor technical equipment, the explosion-proof servo motor comprises a main case, a front end cover and a rear end cover, the interior of the main case is of a hollow structure and is used for placing a coil assembly, one side of the main case is connected to the front end cover, and the other side of the main case is connected to the rear end cover; the sides, facing the main case, of the front end cover and the rear end cover are each provided with an abutting part, and the outer side walls of the abutting parts abut against the inner wall of the main case. The beneficial effects of the utility model are that the contact area between the front end cover and the rear end cover and the main case is increased through the arrangement of the abutting parts, the sealing performance between the front end cover and the rear end cover and the main case is improved, the possibility of contact between an external flammable and explosive medium and an internal circuit of the main case is reduced, the possibility of explosion of the servo motor is reduced, and the service life of the servo motor is prolonged. And the safety performance of the servo motor is improved.

Description

Technical Field

[0001] The present application relates to the field of motor technology equipment, and in particular to an explosion-proof servo motor. Background Art

[0002] The commonly used servo motor is an electric motor that is controlled by a servo system controller to rotate mechanically. The servo motor will rotate a corresponding angle when it receives a pulse from the controller. The servo motor itself can also emit pulses, and the rotation of the motor is controlled by controlling the number of emitted pulses and the number of received pulses.

[0003] The related prior art discloses a new type of permanent magnet servo motor, which includes a base, a shell, an upper cover, a rotating shaft, a rotor, a coil and a magnet. The two ends of the shell are respectively connected to the base and the upper cover. The rotating shaft passes through the upper cover and is installed in the shell, and is rotatably connected to the bearing installed on the base. The rotor is sleeved on the rotating shaft, the coil is arranged on the inner wall of the shell, and the magnet is a magnet with positive and negative poles, which is installed on the base. The utility model effectively drives the rotor to rotate by arranging a coil on the inner wall of the shell, and arranging an electrostatic eliminator and positive and negative magnets. When in use, it has the advantages of simple structure and long life.

[0004] With regard to the above-mentioned related technologies, the servo motor manufactured by this method will generate heat during operation in scenes such as explosive dust environments, and sparks and other phenomena are prone to occur in the internal circuit of the motor, which may easily lead to explosions inside the motor and cause accidents, and the safety is low. Utility Model Content

[0005] In order to reduce explosion accidents of servo motors in flammable and explosive environments and improve the safety performance of servo motors, the present application provides an explosion-proof servo motor.

[0006] The multi-head punch provided in this application adopts the following technical solution:

[0007] An explosion-proof servo motor comprises a main housing, a front end cover and a rear end cover. The interior of the main housing is a hollow structure for placing a coil assembly. One side of the main housing is connected to the front end cover, and the other side is connected to the rear end cover. The front end cover and the rear end cover are both provided with abutment portions on one side facing the main housing, and the outer side walls of the abutment portions abut against the inner wall of the main housing.

[0008] By adopting the above technical solution, the setting of the abutment portion increases the contact area between the front end cover, the rear end cover and the main housing, improves the sealing between the front end cover, the rear end cover and the main housing, reduces the possibility of contact between external flammable and explosive media and the internal circuits of the main housing, reduces the possibility of explosion of the servo motor, and improves the safety performance of the servo motor.

[0009] Optionally, a receiving groove is provided on a side of the abutting portion facing the inner wall of the main housing, a sealing ring is provided in the receiving groove, and the sealing ring abuts against the inner wall of the main housing.

[0010] By adopting the above technical solution, the setting of the sealing ring further improves the sealing between the front cover and the rear cover, further reduces the possibility of contact between external flammable and explosive media and the internal circuits of the main casing, and the setting of the accommodating groove reduces the impact of the sealing ring on the inner wall of the main casing, reduces the possibility of a gap between the abutting part and the inner wall of the main casing, and further improves the safety performance of the servo motor.

[0011] Optionally, a side wall of the front end cover is provided with a diameter expansion ring plate, and a reinforcement block is provided on a side of the main housing facing the front end cover, and the diameter expansion ring plate and the reinforcement block are in contact with each other.

[0012] By adopting the above technical solution, the expansion ring plate and the reinforcement block are arranged to increase the contact area between the front end cover and the main housing. The expansion ring plate can improve the structural strength of the front end cover, and the reinforcement block can improve the structural strength of the main housing. In the event that the servo motor explodes, the impact of the explosion damage can be reduced.

[0013] Optionally, the diameter of the inner wall of the main housing toward the front end cover gradually decreases along a side close to the front end cover.

[0014] By adopting the above technical solution, while thickening the main engine housing, the size of the holes on the main engine housing can be reduced, further improving the safety performance of the servo motor.

[0015] Optionally, a rotating shaft is installed on the coil assembly, and the rotating shaft passes through the front end cover. A limiting groove is provided on the side of the front end cover facing away from the main housing, and an oil seal is provided in the limiting groove. The oil seal is used to seal the gap between the peripheral wall of the rotating shaft and the front end cover.

[0016] By adopting the above technical scheme, the setting of the oil seal can realize the sealed connection between the rotating shaft and the front end cover, reducing the phenomenon of external flammable and explosive substances entering the interior of the main casing. The setting of the limit groove can realize the limitation of the oil seal, reducing the phenomenon of slippage and displacement of the oil seal during operation, and improving the working stability of the oil seal.

[0017] Optionally, a protective cover is provided on a side of the rear end cover facing away from the main housing, a heat conductive block is provided on the protective cover, and the heat conductive block is in contact with a heating area on the coil assembly.

[0018] By adopting the above technical solution, the setting of the heat conductive block can dissipate the heat generated inside the main housing, reduce the phenomenon of heat accumulation inside the main housing, and further improve the safety performance of the servo motor.

[0019] Optionally, a plurality of heat sinks are arranged on a side of the protective cover facing away from the heat conducting block, and the heat sinks are evenly arranged around the center of the protective cover.

[0020] By adopting the above technical solution, the provision of the heat sink can further accelerate the heat dissipation in the main housing.

[0021] Optionally, an explosion-proof cable gland is provided on the protective cover, and the explosion-proof cable gland is used for allowing the lead wire to pass through.

[0022] By adopting the above technical solution, the setting of the explosion-proof cable gland can isolate external flammable and explosive media, improve the structural strength of the main casing, and reduce the impact of the internal explosion of the main casing on the outside.

[0023] In summary, the present application includes at least one of the following beneficial technical effects:

[0024] 1. The setting of the abutment portion increases the contact area between the front cover, the rear cover and the main housing, improves the sealing between the front cover, the rear cover and the main housing, reduces the possibility of contact between the external flammable and explosive medium and the internal circuit of the main housing, reduces the possibility of explosion of the servo motor, and improves the safety performance of the servo motor.

[0025] 2. The setting of the sealing ring further improves the sealing between the front cover and the rear cover, further reduces the possibility of contact between external flammable and explosive media and the internal circuits of the main casing. The setting of the accommodating groove reduces the impact of the sealing ring on the inner wall of the main casing, reduces the possibility of a gap between the abutting part and the inner wall of the main casing, and further improves the safety performance of the servo motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of the explosion-proof servo motor according to an embodiment of the present application.

[0027] Figure 2 It is a schematic diagram of the cross-sectional structure of the explosion-proof servo motor according to an embodiment of the present application.

[0028] Figure 3 yes Figure 2 Enlarged schematic diagram of R in the middle.

[0029] Explanation of the reference numerals: 1. Main housing; 2. Front cover; 3. Rear cover; 4. Coil assembly; 5. Abutment portion; 6. Accommodation groove; 7. Sealing ring; 8. Expansion ring plate; 9. Reinforcement block; 10. Rotating shaft; 11. Limiting groove; 12. Oil seal; 13. Protective cover; 14. Heat conduction block; 15. Heat sink; 16. Explosion-proof cable gland. DETAILED DESCRIPTION

[0030] The following is combined with Figure 1-3 This application is described in further detail.

[0031] The present application embodiment discloses an explosion-proof servo motor. Figure 1 , Figure 2 and Figure 3 The explosion-proof servo motor includes a main housing 1, a front cover 2 and a rear cover 3. A coil assembly 4 and a rotating shaft 10 are installed inside the main housing 1. The coil assembly 4 is used to drive the rotating shaft 10 to rotate. A bearing is also arranged on the rotating shaft 10, and the bearing is installed on the inner wall of the main housing 1. One side of the main housing 1 is connected to the front cover 2, and the other side is connected to the rear cover 3. The front cover 2 and the rear cover 3 are integrally formed with abutment portions 5 on the side facing the main housing 1. The outer wall of the abutment portion 5 abuts against the inner wall of the main housing 1. The abutment portion 5 is provided with an annular receiving groove 6 on the side facing the inner wall of the main housing 1. A sealing ring 7 is inserted in the receiving groove 6. The sealing ring 7 of this embodiment can be made of rubber, and there is an interference fit between the sealing ring 7 and the inner wall of the main housing 1. The inner diameter of the main housing 1 gradually decreases toward the side close to the front cover 2, and a reinforcing block 9 is integrally formed on the side of the main housing 1 facing the front cover 2. A diameter expansion slide plate is integrally formed on the side wall of the front cover 2, and the diameter expansion ring plate 8 and the reinforcing block 9 fit each other. The rotating shaft 10 passes through the front cover 2, and a limiting groove 11 is provided on the side of the front cover 2 away from the main housing 1. An oil seal 12 is provided in the limiting groove 11, and the oil seal 12 is used to seal the gap between the peripheral wall of the rotating shaft 10 and the front cover 2. The main housing 1, the front cover 2 and the rear cover 3 of this embodiment are made of 6061 aluminum alloy, which has the properties of high strength and good thermal conductivity.

[0032] Reference Figure 2 A protective cover 13 is welded on the side of the rear cover 3 away from the main housing 1. The protective cover 13 of this embodiment can be an encoder rear cover. A heat conductive block 14 is bonded to the protective cover 13. The heat conductive block 14 of this embodiment can be made of metal. The heat conductive block 14 fits the heating area on the coil assembly 4. The heat conductive block 14 of this embodiment fits the PCB board. A heat sink 15 is integrally formed on the side of the protective cover 13 away from the rear cover 3. The heat sink 15 is provided with multiple fins and is evenly arranged at the center of the protective cover 13. An explosion-proof gland 16 is installed on the side wall of the protective cover 13 for the lead wire to pass through.

[0033] The implementation principle of an explosion-proof servo motor in the embodiment of the present application is as follows: when in use, the front cover 2 and the rear cover 3 increase the contact area with the main housing 1 through the abutment, reducing the explosion of the external flammable and explosive medium entering the main housing 1, and the setting of the heat conducting block 14 and the heat sink 15 can accelerate the heat dissipation inside the main housing 1 and reduce the occurrence of heat accumulation. The servo motor provided in this embodiment can work in a flammable and explosive environment with high safety performance.

[0034] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An explosion-proof servo motor, characterized in that: A main housing (1), a front end cover (2) and a rear end cover (3); the interior of the main housing (1) is a hollow structure for accommodating a coil assembly (4); one side of the main housing (1) is connected to the front end cover (2), and the other side is connected to the rear end cover (3); the front end cover (2) and the rear end cover (3) are both provided with abutment portions (5) on the side facing the main housing (1); the outer side wall of the abutment portion (5) abuts against the inner wall of the main housing (1).

2. The explosion-proof servo motor according to claim 1, characterized in that: A receiving groove (6) is provided on one side of the abutting portion (5) facing the inner wall of the main housing (1), a sealing ring (7) is provided in the receiving groove (6), and the sealing ring (7) abuts against the inner wall of the main housing (1).

3. The explosion-proof servo motor according to claim 1, characterized in that: The side wall of the front end cover (2) is provided with a diameter expansion ring plate (8), and the side of the main housing (1) facing the front end cover (2) is provided with a reinforcement block (9), and the diameter expansion ring plate (8) and the reinforcement block (9) are in contact with each other.

4. The explosion-proof servo motor according to claim 1, characterized in that: The diameter of the inner wall of the main housing (1) towards the front end cover (2) gradually decreases along a side close to the front end cover (2).

5. The explosion-proof servo motor according to claim 1, characterized in that: A rotating shaft (10) is mounted on the coil assembly (4), and the rotating shaft (10) passes through the front end cover (2). A limiting groove (11) is provided on the side of the front end cover (2) facing away from the main housing (1), and an oil seal (12) is provided in the limiting groove (11). The oil seal (12) is used to seal the gap between the peripheral wall of the rotating shaft (10) and the front end cover (2).

6. The explosion-proof servo motor according to claim 1, characterized in that: A protective cover (13) is provided on the side of the rear end cover (3) facing away from the main housing (1), and a heat conducting block (14) is provided on the protective cover (13), and the heat conducting block (14) is in contact with the heating area on the coil assembly (4).

7. The explosion-proof servo motor according to claim 6, characterized in that: A plurality of heat sinks (15) are arranged on the side of the protective cover (13) facing away from the heat conducting block (14), and the heat sinks (15) are evenly arranged at the center of the protective cover (13).

8. The explosion-proof servo motor according to claim 6, characterized in that: The protective cover (13) is provided with an explosion-proof cable gland (16), and the explosion-proof cable gland (16) is used for allowing a lead wire to pass through.

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