Outdoor direct-current brushless gear motor

Abstract

The utility model relates to an outdoor DC brushless deceleration motor, the motor comprises a motor body and a gear box, the gear box comprises a planet wheel, a PIN shaft, a planet carrier and a sun wheel, the motor body is a DC brushless motor and comprises a housing, a rotor assembly and a stator assembly, the planet wheel and the PIN shaft are connected through a roller pin, and the PIN shaft is connected with the housing. The PIN shaft is installed on the planet carrier, the planet gear is meshed with the sun gear, and the sun gear is in transmission connection with the rotor assembly. Compared with the prior art, the utility model has the advantages of long service life, high efficiency, high reliability, high protection level and the like.

Description

Technical Field

[0001] The utility model relates to a motor, in particular to a brushless DC reduction motor used outdoors. Background Art

[0002] Gear motors are widely used in the reduction transmission mechanisms of various general mechanical equipment such as metallurgy, mining, lifting, transportation, cement, construction, chemical industry, textile, printing and dyeing, pharmaceuticals, medical treatment, beauty, health massage, office supplies, etc.

[0003] The reduction motor includes a motor part and a gearbox part. The existing reduction motor has the following problems:

[0004] 1) Motor part of the reduction motor: The existing reduction motor is commonly used with a brushed DC motor. The brushes in the brushed motor have friction with the commutator, and the brushes are easy to wear, so the brushed motor has the disadvantages of short life and high noise. The brushless DC motor uses electronic commutation instead of mechanical commutation, which increases the motor life and reduces the motor noise. The structure of the brushless DC motor is also simpler and more reliable, and the maintenance cost is low.

[0005] 2) Gearbox of the reduction motor: The inner hole of the planetary gear (1) and the rotating shaft (8) of the existing reduction motor usually adopts a clearance fit, which has friction resistance and low gearbox operation efficiency; there is generally no axial limit between the planetary carrier (5) and the sun gear (6), and if subjected to additional axial force, it may become loose.

[0006] 3) The reduction motor used outdoors needs to meet the requirements of weather resistance and waterproofness. Generally, electrophoresis is used to treat the outer surface of the reduction motor. Electrophoresis may cause partial coating or insufficient coating. At the same time, the weather resistance of the primer of electrophoresis is poor. Utility Model Content

[0007] The purpose of the utility model is to overcome the defects of the prior art and provide a brushless DC reduction motor for outdoor use with high life, high efficiency, high reliability and high protection level.

[0008] The purpose of the utility model can be achieved through the following technical solutions:

[0009] According to one aspect of the utility model, a DC brushless reduction motor for outdoor use is provided, which includes a motor body and a gear box, the gear box includes planetary gears, a PIN shaft, a planetary carrier and a sun gear, the motor body is a DC brushless motor, including a housing, a rotor assembly and a stator assembly, the planetary gears and the PIN shaft are connected by roller needles, the PIN shaft is installed on the planetary carrier, the planetary gears are meshed with the sun gear, and the sun gear is drivingly connected to the rotor assembly.

[0010] As a preferred technical solution, an elastic circlip is used for axial positioning after the planet carrier and the sun gear are assembled.

[0011] As a preferred technical solution, a heat shrinkable tube is sleeved on the outer shell of the DC brushless motor.

[0012] As a preferred technical solution, a flange for installation and positioning is provided at the end of the gearbox.

[0013] As a preferred technical solution, the rotor assembly includes a rotating shaft, a rotor core in interference fit with the rotating shaft, a magnetic steel bonded to the rotor core, and a steel sleeve for preventing the magnetic steel from being thrown out.

[0014] As a preferred technical solution, the DC brushless motor further includes a front end cover, a rear end cover and a motor housing. The front end cover is provided with an oil seal for preventing the grease in the gearbox from entering the motor. Sealing glue is provided at the joints of the front end cover and the motor housing, the motor housing and the rear end cover, and the rear end cover and the outer shell;

[0015] Bearings are assembled at both the front end and the rear end of the rotating shaft, and the bearings are fixed through the bearing chambers of the front end cover and the rear end cover.

[0016] As a preferred technical solution, the stator assembly includes a stator core, a skeleton spliced on the stator core, and an enameled wire wound outside the skeleton.

[0017] As a preferred technical solution, PIN pins are inserted into the skeleton, the head and tail ends of the enameled wire are wound around the PIN pins, and a PCB board is placed on the enameled wire;

[0018] A breather valve and an aviation socket are provided on the outer shell. The aviation socket is electrically connected to the PCB board, and the threaded hole of the breather valve is a counterbore.

[0019] As a preferred technical solution, an O-ring is provided at the connection between the gearbox and the DC brushless motor.

[0020] As a preferred technical solution, the outer diameter of the motor housing is smaller than the outer diameter of the front end cover.

[0021] Compared with the prior art, the utility model has the following advantages:

[0022] 1) The reduction motor of the utility model has higher efficiency, longer service life and lower noise;

[0023] 2) In the utility model, a needle roller connection is adopted between the output stage planet carrier and the PIN shaft, and the gearbox has higher operating efficiency and lower noise;

[0024] 3) After the planet carrier and the sun gear are assembled in the utility model, an elastic circlip is used for positioning to prevent the sun gear from loosening;

[0025] 4) The outer sleeve of the speed reduction motor of the present utility model is heat-shrinkable tubing, making the speed reduction motor more weather-resistant and with a higher protection level. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a partial structural schematic diagram of the gearbox of the present utility model;

[0027] Figure 2 It is a partial structural schematic diagram of the gearbox of the present utility model;

[0028] Figure 3 It is a structural schematic diagram of the motor of the present utility model;

[0029] Figure 4 It is a structural schematic diagram of the housing of the present utility model;

[0030] Figure 5 It is a structural schematic diagram of the stator assembly of the present utility model;

[0031] Among them, 1 is a planetary gear, 2 is a PIN shaft, 3 is a needle roller, 4 is a snap ring, 5 is a planet carrier, 6 is a sun gear, 7 is a flange, 8 is a rotating shaft, 9 is a rotor core, 10 is a permanent magnet, 11 is a steel sleeve, 12 is a stator core, 13 is a skeleton, 14 is an enameled wire, 15 is a PIN pin, 16 is a PCB board, 17 is an O-ring, 18 is a breather valve, 19 is an aviation socket, 20 is an oil seal, 21 is a machine housing, 22 is a rear end cover, 23 is a housing, 24 is heat-shrinkable tubing, and 25 is a front end cover. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0032] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some but not all of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0033] As Figure 1 and Figure 2 shown, a DC brushless speed reduction motor for outdoor use, the motor includes a motor body and a gearbox. The gearbox includes a planetary gear 1, a PIN shaft 2, a planet carrier 5 and a sun gear 6. The motor body is a DC brushless motor, including a housing 23, a rotor assembly and a stator assembly. The planetary gear 1 and the PIN shaft 2 are connected by a needle roller 3. The PIN shaft 2 is installed on the planet carrier 5. The planetary gear 1 meshes with the sun gear 6. The sun gear 6 is in transmission connection with the rotor assembly.

[0034] Among them, the gearbox is a planetary gear transmission reducer, which is compact in structure, has a large load-bearing capacity and high transmission efficiency. It is driven by an electric motor and has a total of four-stage transmissions from the input stage to the output stage. Each stage of the planetary gear transmission includes three basic components: an internal gear ring, a sun gear and a planet carrier. Among them, the planet carrier is used to support the planet gears so that they can revolve while rotating. The four stages share a fixed internal gear ring. The power of each stage is input by the sun gear and output by the planet carrier. The output torque and speed of the previous stage are the input torque and speed of the next stage. Through multi-stage transmissions, corresponding speeds and torques can be output to meet the usage requirements of customers under different working conditions.

[0035] The DC brushed motor is replaced with a DC brushless motor, which has a longer lifespan, lower noise and higher efficiency.

[0036] As Figure 1 shown, a needle roller 3 is used to support between the planetary gear 1 of the gearbox and the PIN shaft 2, which has a low cost and a compact structure. It can make the gearbox run more smoothly, endow the output stage with a higher load-bearing capacity, and can better reduce the frictional resistance, lower the noise and improve the operating efficiency of the gearbox.

[0037] As Figure 2 shown, after the planet carrier 5 and the sun gear 6 are assembled, an elastic circlip 4 is used for axial positioning, which can better ensure that the connection between the two will not be affected by the additional axial force that may occur during the operation of the gearbox and thus become loose, improving the reliability of the connection.

[0038] The outer jacket of the reduction motor is heat-shrunk tube 24 to improve the weather resistance and protection level of the motor.

[0039] As Figure 3 shown, there is a flange 7 at the front end of the gearbox for installation and positioning.

[0040] As Figure 3 shown, the rotor assembly of the DC brushless motor includes a rotating shaft 8, a rotor core 9 that is interference-fitted with the rotating shaft 8, and a permanent magnet 10 that is bonded to the rotor core 9.

[0041] As Figure 3 shown, the outer jacket of the rotor assembly of the DC brushless motor is a steel sleeve 11 to prevent the permanent magnet 10 from being thrown out and improve the reliability of the motor.

[0042] As Figure 3 shown, for the rotor assembly of the DC brushless motor, bearings are assembled at both the front end and the rear end of the rotating shaft 8, and the bearings are fixed through the bearing chambers of the front and rear end covers 22.

[0043] As Figure 3 shown, the front end cover 25 of the DC brushless motor is equipped with an oil seal 20 to prevent the grease of the gearbox from entering the motor.

[0044] AsFigure 3 As shown in the figure, the stator assembly of the DC brushless motor includes a stator core 12, a skeleton 13 spliced on the stator core 12, and an enameled wire 14 wound outside the skeleton 13.

[0045] As Figure 5 shown in the figure, PIN pins 15 are inserted into the skeleton 13 of the stator assembly of the DC brushless motor. The head and tail ends of the enameled wire 14 are wound around the PIN pins 15. The PCB board 16 is directly placed on the enameled wire 14, and the equipment can be used for pre-tinning at one time, which is convenient for production.

[0046] As Figure 4 shown in the figure, a breather valve 18 and an aviation socket 19 are provided on the housing 23 of the reduction motor. The aviation socket 19 is electrically connected to the PCB board 16.

[0047] As Figure 3 shown in the figure, there is an O-ring 17 at the connection between the gearbox of the reduction motor and the DC brushless motor, which improves the sealing performance of the motor.

[0048] As Figure 3 shown in the figure, sealant is applied at the joints of the front end cover 25, the housing 21, the rear end cover 22, and the housing 23 of the DC brushless motor, which improves the sealing performance of the motor.

[0049] As Figure 3 shown in the figure, the reduction motor is sleeved with a heat shrinkable tube 24. The outer diameter of the housing 21 of the DC brushless motor is smaller than the outer diameter of the front end cover 25. When the heat shrinkable tube 24 shrinks, it is easier to fix. At the same time, the sealing performance of the heat shrinkable tube 24 is also improved, which improves the protection performance of the reduction motor.

[0050] As Figure 3 shown in the figure, the threaded hole of the breather valve 18 on the housing 23 of the DC brushless motor is a counterbore, which can control the compression amount of the breather valve 18 and ensure the protection level of the breather valve 18.

[0051] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of various equivalent modifications or substitutions, and these modifications or substitutions should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A DC brushless reduction motor for outdoor use, characterized in that, The motor includes a motor body and a gearbox. The gearbox includes a planetary gear (1), a PIN shaft (2), a planet carrier (5) and a sun gear (6). The motor body is a DC brushless motor, including a housing (23), a rotor assembly and a stator assembly. The planetary gear (1) and the PIN shaft (2) are connected by needle rollers (3). The PIN shaft (2) is installed on the planet carrier (5). The planetary gear (1) meshes with the sun gear (6). The sun gear (6) is drivingly connected to the rotor assembly.

2. The DC brushless reduction motor for outdoor use according to claim 1, wherein After the planet carrier (5) and the sun gear (6) are assembled, an elastic retaining ring (4) is used for axial limit.

3. The DC brushless reduction motor for outdoor use according to claim 1, characterized in that, A heat shrinkable tube (24) is sleeved on the housing (23) of the DC brushless motor.

4. The DC brushless reduction motor for outdoor use according to claim 1, characterized in that, A flange (7) for installation and positioning is provided at the end of the gearbox.

5. The DC brushless reduction motor for outdoor use according to claim 1, characterized in that, The rotor assembly includes a rotating shaft (8), a rotor core (9) in interference fit with the rotating shaft (8), a permanent magnet (10) bonded to the rotor core (9), and a steel sleeve (11) for preventing the permanent magnet (10) from being thrown out.

6. The DC brushless reduction motor for outdoor use according to claim 5, wherein, The DC brushless motor further includes a front end cover (25), a rear end cover (22) and a casing (21). The front end cover (25) is provided with an oil seal (20) for preventing the grease of the gearbox from entering the motor. Sealing glue is provided at the joints of the front end cover (25) and the casing (21), the casing (21) and the rear end cover (22), and the rear end cover (22) and the housing (23). Bearings are assembled at both the front end and the rear end of the rotating shaft (8), and the bearings are fixed through the bearing chambers of the front end cover (25) and the rear end cover (22).

7. The DC brushless reduction motor for outdoor use according to claim 1, wherein The stator assembly includes a stator core (12), a skeleton (13) spliced on the stator core (12), and an enameled wire (14) wound outside the skeleton (13).

8. The DC brushless reduction motor for outdoor use according to claim 7, characterized in that, PIN pins (15) are inserted on the skeleton (13). The head and tail ends of the enameled wire (14) are wound around the PIN pins (15). A PCB board (16) is placed on the enameled wire (14). A breather valve (18) and an aviation socket (19) are provided on the housing (23). The aviation socket (19) is electrically connected to the PCB board (16). The threaded hole of the breather valve (18) is a counterbore.

9. The DC brushless reduction motor for outdoor use according to claim 1, characterized in that, An O-ring (17) is provided at the joint of the gearbox and the DC brushless motor.

10. A DC brushless reduction motor for outdoor use according to claim 6, characterized in that, The outer diameter of the casing (21) is smaller than the outer diameter of the front end cover (25).

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