An explosion-proof motor for an explosion-proof steering wheel

Abstract

The present invention discloses an explosion-proof motor for an explosion-proof steering wheel, comprising a cable entry device, a rotating shaft, a stator, a motor housing, a front cover, a rear cover, a front bearing, a rear bearing, an encoder, an encoder cover, a waterproof and dustproof film, a micro fan, a micro fan bracket, a heat-dissipating aluminum alloy cover, and a front bearing gland. The front bearing gland prevents axial movement of the front bearing by axially positioning the front bearing. The rear cover adopts a slotted design to reduce the weight of the motor and connects the encoder cover with the motor housing cavity. The micro fan, micro fan bracket, waterproof and dustproof film, and heat-dissipating aluminum alloy cover constitute the heat dissipation system of the explosion-proof motor, which can achieve rapid internal heat dissipation during motor operation. The explosion-proof motor for an explosion-proof steering wheel proposed by the present invention has the advantages of compact structure, small size, light weight, good heat dissipation, and no axial movement. It can meet the requirements of explosion-proof steering wheels for motors with explosion-proof properties, good heat dissipation, and small size.

Description

Technical Field

[0001] The present invention relates to the technical field of explosion-proof motors, in particular to an explosion-proof motor for an explosion-proof steering wheel. Background Art

[0002] The steering wheel motor provides driving and steering power for the steering wheel. However, in some special application places, such as working in flammable and explosive environments, the motor, as one of the core components of the explosion-proof steering wheel, must have explosion-proof performance that meets the requirements of the site to avoid the motor as a potential ignition source and cause safety accidents.

[0003] At present, most explosion-proof motors on the market have the following defects: (1) The motors are too large and heavy, which limits their application areas. For example, explosion-proof steering wheels have very high requirements for the duty cycle of the motors, and require the motors to have the advantage of being small in size to meet the requirements of low installation height; (2) In terms of motor heat dissipation design, some use fan-blade type, but this makes the motor large in size; some use built-in cooling system, but it increases the complexity of the motor structure and the overall mass volume; some use extended motor size and built-in baffle heat dissipation strip form, but it increases the length of the motor and cannot meet the requirements of low vertical installation height of the steering motor in the explosion-proof steering wheel; (3) The motor meets the requirements of the explosion-proof steering wheel for motor volume, but the heat dissipation performance is not ideal. The heat dissipation relies on the internal conduction of the material itself to the surrounding environment, and the heat dissipation rate is slow. Summary of the Invention

[0004] The purpose of the present invention is to provide an explosion-proof motor for an explosion-proof steering wheel, which meets the requirements of the explosion-proof steering wheel on the volume, explosion-proofness and heat dissipation of the explosion-proof motor, so that the explosion-proof steering wheel can work continuously and reliably in an explosive and hazardous environment.

[0005] The technical solution for achieving the purpose of the present invention is: an explosion-proof motor for an explosion-proof steering wheel, comprising a motor housing, a rotating shaft, a stator, a front cover, and a rear cover, wherein the front cover and the rear cover are arranged at both ends of the motor housing, and the rotating shaft and the stator are arranged in the motor housing. The motor also includes a front bearing, a front bearing gland, a rear bearing, an encoder, an encoder cover, a cable entry device, a waterproof and dustproof film, a micro fan, a micro fan bracket, and a heat-dissipating aluminum alloy cover;

[0006] The encoder cover is connected to the rear end cover to form a first internal space, in which a micro fan, a micro fan bracket and an encoder are arranged. The micro fan is arranged on the micro fan bracket, and the micro fan bracket is connected to the rear end cover. The rear end cover adopts a notch design, and the micro fan is directly opposite a notch of the rear end cover.

[0007] The rear end cover, the motor housing and the front end cover form a second internal space, in which a rear bearing, a rotating shaft, a stator, a front bearing pressure cover and a front bearing are arranged. One end of the rotating shaft passes through the rear end cover, and the outer periphery of the end is provided with a rear bearing. The other end of the rotating shaft passes through the front end cover, and the outer periphery of the end is provided with a front bearing. The front bearing pressure cover presses the outer ring of the front bearing.

[0008] The heat dissipation aluminum alloy cover is fixed to the tail of the encoder cover, the waterproof and dustproof film is attached to the inside of the heat dissipation aluminum alloy cover, the cable introduction device is located on one side of the encoder cover, and the micro fan cable and encoder cable are led out to the outside of the motor through the cable introduction device.

[0009] Compared with existing explosion-proof motors, the explosion-proof motor for an explosion-proof steering wheel provided by the present invention has obvious advantages in terms of volume, heat dissipation design, and weight reduction design, thereby increasing the explosion-proof performance of the motor during operation and extending its service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic cross-sectional structural diagram of the present invention.

[0011] Figure 2 It is a schematic structural diagram of the rear end cover of the present invention.

[0012] Figure 3 It is a schematic structural diagram of the encoder cover of the present invention.

[0013] Figure 4 It is a schematic structural diagram of the front bearing gland of the present invention.

[0014] Figure 5 It is a schematic structural diagram of the heat dissipating aluminum alloy cover of the present invention.

[0015] Figure 6 It is a schematic structural diagram of the micro fan bracket of the present invention.

[0016] In the figure: 1 rotating shaft; 2 front end cover; 3 rear end cover; 4 stator; 5 motor housing; 6 front bearing cover; 7 encoder cover; 8 cable entry device; 9 heat dissipation aluminum alloy cover; 10 waterproof and dustproof film; 11 heat dissipation vents; 12 micro fan; 13 micro fan bracket; 14 encoder; 15 rear bearing; 16 front bearing. DETAILED DESCRIPTION

[0017] The technical solution of the present invention is further described in detail below with reference to the accompanying drawings:

[0018] like Figures 1 to 6As shown, an explosion-proof motor for an explosion-proof steering wheel of the present invention includes a cable entry device 8, a rotating shaft 1, a stator 4, a motor housing 5, a front cover 2, a rear cover 3, a front bearing 16, a rear bearing 15, an encoder 14, an encoder cover 7, a waterproof and dustproof film 10, a micro fan 12, a micro fan bracket 13, a heat dissipating aluminum alloy cover 9, and a front bearing gland 6;

[0019] like Figure 1 As described, the spatial position distribution of the components of the explosion-proof motor for explosion-proof steering wheels can be divided into an internal space and an external space. The internal space is divided into a first internal space and a second internal space. The first internal space is located between the external space and the second internal space. The space formed by the encoder cover 7 and the rear end cover 3 is the first internal space, the space formed by the rear end cover 3, the motor housing 5 and the front end cover 2 is the second internal space, and the rest is the external space.

[0020] The components in the first internal space include a micro fan 12, a micro fan bracket 13, and an encoder 14; the components in the second internal space include a rear bearing 15, a rotating shaft 1, a stator 4, a front bearing gland 6, and a front bearing 16; the components in the external space include a heat dissipating aluminum alloy cover 9, a waterproof and dustproof film 10, and a cable entry device 8;

[0021] Preferably, in this embodiment, the front end cover 2, the rear end cover 3, the motor housing 5 and the encoder cover 7 are made of aluminum alloy.

[0022] like Figure 1 and Figure 4 As shown, the front bearing gland 6 achieves axial positioning by pressing the outer ring of the front bearing 16 located in the bearing chamber of the front end cover 2, thereby preventing axial movement of the front bearing 16 during motor operation and reducing motor operating noise. The gland 6 is fixed to the front end cover 2 located inside the motor housing 5 by screws. The rear end cover 3 connects the encoder cover 7 with the motor housing cavity. The micro fan 12, micro fan bracket 13, waterproof and dustproof film 10, and heat-dissipating aluminum alloy cover 9 together constitute the heat dissipation system of the explosion-proof motor, which can achieve rapid internal heat dissipation during motor operation.

[0023] like Figure 2 As shown, the rear end cover 3 adopts a slot design to reduce the overall mass of the motor, and connects the encoder cover 7 with the motor housing 5, providing a channel for the micro fan 12 to transport wind to the cavity of the motor housing 5. The number of slots is 3 while meeting the strength requirements of the rear end cover 3 and the fixed position of the encoder 14.

[0024] like Figure 1As shown, the micro fan 12 is located between the tail of the encoder cover 7 and the rear end cover 3, and is fixed to the micro fan bracket 13 by screws. It can continuously deliver air to the cavity of the motor housing 5, forming a heat flow cycle in the cavity of the motor housing 5, and taking the heat generated when the motor is running out of the cavity of the motor housing 5, thereby reducing the temperature of the motor and increasing the explosion-proof performance of the motor. The cable of the micro fan 12 is led out to the outside of the motor through the sealed plug hole of the cable introduction device 8.

[0025] like Figure 1 and Figure 6 As shown, the micro fan bracket 13 is designed to be a Z-shaped structure, and the Z-shaped bottom is fixed to the threaded hole of the rear end cover 3 by screws, and is located at the edge of the notch of the rear end cover 3, so that the micro fan 12 can face a notch of the rear end cover 3, which is convenient for the micro fan 12 to transport wind into the cavity of the motor housing 5. In this embodiment, the number of micro fan brackets 13 used is 2.

[0026] The cable entry device 8 adopts a two-hole filler form, one hole is used to pass the cable of the micro fan 12, and the other hole is used to pass the cable of the encoder 14. The cable inside the motor is led out to the outside of the motor through its hole. The cable is locked by the threaded compression component and compression gasket of the cable entry device 8 to prevent the cable from being pulled loose. The cable entry device 8 is connected to the motor by its own external thread. Figure 3 The threaded hole opened on the upper side of the encoder cover 7 is matched to achieve the fixation of the cable introduction device 8.

[0027] like Figure 1 and Figure 3 As shown, the rear portion of the encoder cover 7 includes a plurality of heat dissipation vents 11, which serve as channels connecting the interior of the encoder cover 7 with the external environment. The heat brought out of the cavity of the motor housing 5 by the micro fan 12 can be discharged to the outside of the motor through the heat dissipation vents 11.

[0028] like Figure 1 As shown, the waterproof and dustproof film 10 is installed in a groove opened on the outside of the encoder cover 7 according to the size of the waterproof and dustproof film 10, and is used in conjunction with the heat dissipation vents 11 on the encoder cover 7 to prevent external dust from entering the interior of the motor and conduct the heat escaping from the heat dissipation vents 11 to the surrounding environment outside the motor.

[0029] In this embodiment, if Figure 5As shown, the heat dissipating aluminum alloy cover 9 is in the form of a boss with mesh holes. Its function is, firstly, to press the waterproof and dustproof film through the boss; secondly, the multi-mesh design and the alloy with good thermal conductivity increase the area in contact with the air, which can accelerate the heat dissipation from the waterproof and dustproof film 10 to the surrounding environment, and is fixed by screws in a groove opened on the outside of the encoder cover 7 according to the size of the heat dissipating aluminum alloy cover 9.

[0030] The principle of the motor heat dissipation cycle is as follows: when the motor is running, the micro fan 12 is started, and the wind generated passes through the slot of the rear end cover 3 and enters the cavity of the motor housing 5. The heat generated by the operation of the motor in the motor housing 5 can be brought to the encoder cover 7 through the slot of the rear end cover 3, and then the heat is quickly conducted to the surrounding environment through the heat dissipation vents 11 of the encoder cover 7, the waterproof and dustproof film 10 fixed to the outside of the encoder cover 7 and the heat dissipation aluminum alloy cover 9, thereby realizing the heat dissipation of the motor system, avoiding excessive temperature rise inside the motor, and improving the explosion-proof safety performance.

[0031] The above description is only a specific embodiment of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the technical ideas and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An explosion-proof motor for an explosion-proof steering wheel, comprising a motor housing (5), a rotating shaft (1), a stator (4), a front end cover (2), and a rear end cover (3), wherein the front end cover (2) and the rear end cover (3) are arranged at both ends of the motor housing (5), and the rotating shaft (1) and the stator (4) are arranged in the motor housing (5), characterized in that: The motor further comprises a front bearing (16), a front bearing gland (6), a rear bearing (15), an encoder (14), an encoder cover (7), a cable lead-in device (8), a waterproof and dustproof film (10), a micro fan (12), a micro fan bracket (13), and a heat dissipating aluminum alloy cover (9); The spatial distribution of the components of the explosion-proof motor for the explosion-proof steering wheel is divided into an internal space and an external space. The internal space is divided into a first internal space and a second internal space. The first internal space is located between the external space and the second internal space. The encoder cover (7) is connected to the rear end cover (3) to form a first internal space, in which a micro fan (12), a micro fan bracket (13) and an encoder (14) are provided. The micro fan (12) is arranged on the micro fan bracket (13), and the micro fan bracket (13) is connected to the rear end cover (3). The rear end cover (3) adopts a notch design form, and the micro fan (12) faces a notch of the rear end cover (3). The rear end cover (3), the motor housing (5) and the front end cover (2) form a second internal space, in which a rear bearing (15), a rotating shaft (1), a stator (4), a front bearing pressure cover (6) and a front bearing (16) are arranged. One end of the rotating shaft (1) passes through the rear end cover (3), and the outer periphery of the end is provided with a rear bearing (15). The other end of the rotating shaft (1) passes through the front end cover (2), and the outer periphery of the end is provided with a front bearing (16). The front bearing pressure cover (6) presses the outer ring of the front bearing (16). The heat dissipation aluminum alloy cover (9) is fixed to the rear of the encoder cover (7), the waterproof and dustproof film (10) is attached to the inner side of the heat dissipation aluminum alloy cover (9), the cable introduction device (8) is located on one side of the encoder cover (7), and the cable of the micro fan (12) and the cable of the encoder (14) are led out to the outside of the motor through the cable introduction device (8); The micro fan (12) is fixed to the micro fan bracket (13) by screws, and the cable of the micro fan (12) is led out to the outside of the motor through the sealing plug hole of the cable introduction device (8); The micro fan bracket (13) is a Z-shaped structure, and the bottom of the micro fan bracket (13) is fixed to the threaded hole of the rear end cover (3) by screws; The cable introduction device (8) adopts a two-hole filler form, one hole passes the cable of the micro fan (12), and the other hole passes the cable of the encoder (14). The cable introduction device (8) has a threaded compression component and a compression gasket; The heat dissipation aluminum alloy cover (9) is in the form of a boss with mesh holes, the mesh holes are made of a heat-conductive alloy, and the heat dissipation aluminum alloy cover (9) is fixed in a groove on the outside of the encoder cover (7) by screws, and the size of the groove is consistent with the size of the heat dissipation aluminum alloy cover (9); The encoder cover (7) is provided with a plurality of heat dissipation vents (11); the waterproof and dustproof film (10) is fitted with the heat dissipation vents (11); The micro fan (12) is located between the rear end of the encoder cover (7) and the rear end cover (3), and continuously delivers air to the cavity of the motor housing (5), forming a heat flow cycle in the cavity of the motor housing (5), and taking the heat generated when the motor is running out of the cavity of the motor housing (5), thereby reducing the temperature of the motor; When the motor is running, the micro fan (12) is started, and the wind generated enters the cavity of the motor housing (5) through the notch of the rear end cover (3), and the heat generated by the operation of the motor in the motor housing (5) is brought to the encoder cover (7) through the notch of the rear end cover (3). The heat is then quickly conducted to the surrounding environment through the heat dissipation vents (11) of the encoder cover (7), the waterproof and dustproof film (10) fixed to the outside of the encoder cover (7), and the heat dissipation aluminum alloy cover (9), thereby achieving heat dissipation of the motor system.

2. The explosion-proof motor for an explosion-proof steering wheel according to claim 1, characterized in that: The number of notches on the rear end cover (3) is 3.

3. The explosion-proof motor for an explosion-proof steering wheel according to claim 1, characterized in that: The front bearing pressure cover (6) is fixed to the front end cover (2) by screws.

4. The explosion-proof motor for an explosion-proof steering wheel according to claim 1, characterized in that: The front end cover (2), the rear end cover (3), the motor housing (5) and the encoder cover (7) are made of aluminum alloy.

Images