A brushless DC reduction motor

Abstract

The utility model discloses a brushless DC reduction motor, including an output middle shaft, the surface of the output middle shaft is movably sleeved with a motor housing, the surface of the output middle shaft is located inside the motor housing and sleeved with a fixed mounting ring, the surface of the fixed mounting ring is fixedly sleeved with a motor stator, the surface of the output middle shaft is located around the motor stator and sleeved with a motor rotor, and the rear surface of the motor rotor is fixedly mounted with a sun gear. The brushless DC reduction motor described in the utility model has an integrated setting that makes it smaller and lighter than the traditional motor and reducer after installation. The small size makes the brushless DC reduction motor compatible with a variety of products of different specifications on the market, and the lightness makes it more convenient to move and transport. In addition, the brushless DC reduction motor does not need personnel to connect the motor and the reducer as in the traditional way, which greatly saves installation costs and installation time.

Description

Technical Field

[0001] The utility model relates to the field of motors, in particular to a brushless DC reduction motor. Background Art

[0002] A motor (commonly known as a "motor") is an electromagnetic device that realizes the conversion or transmission of electrical energy according to the law of electromagnetic induction. It can be divided into DC motors and AC motors according to the type of working power supply. DC motors can be divided into brushless DC motors and brushed DC motors according to their structure and working principle. Brushless DC motors are a typical mechatronics product and are more widely used at this stage because they have no brushes and have a longer service life. However, whether it is a brushless DC motor or a brushed DC motor, the torque is the same at the same speed when used. Therefore, some mechanical equipment requires high torque output and needs to be used with a reducer. In this way, extra manpower is required when installing the motor and reducer. Moreover, after the motors and reducers on the market are installed, they are large in size under high torque conditions, which limits their height and cannot be compatible with a variety of products of different specifications, thus failing to meet various automated production needs. To this end, we propose a brushless DC reduction motor. Utility Model Content

[0003] The main purpose of the utility model is to provide a brushless DC reduction motor, which can effectively solve the problems in the background technology.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0005] A brushless DC reduction motor comprises an output central shaft, a motor housing is movably sleeved on the surface of the output central shaft, a fixed mounting ring is sleeved on the surface of the output central shaft located inside the motor housing, a motor stator is fixedly sleeved on the surface of the fixed mounting ring, a motor rotor is sleeved on the surface of the output central shaft located around the motor stator, a sun gear is fixedly mounted on the rear surface of the motor rotor, a planetary gear structure is fixedly mounted on the surface of the output central shaft behind the sun gear, a gear ring is fixedly mounted on the inside of the motor housing near a port, and a sealing cover is fixedly mounted on the rear port of the motor housing.

[0006] Furthermore, a heat dissipation fin is fixedly installed on the outer arc surface of the motor housing, a fixing screw groove is fixedly installed on the outer arc surface of the motor housing near the port position, and a sealed bearing is fixedly embedded in the port on the front surface of the motor housing.

[0007] Furthermore, a bearing groove is provided on the inner surface of the sealing cover plate, a screw fixing ring is fixedly installed on the surface edge of the sealing cover plate, and a sealing gasket is fixedly installed on the inner side surface of the sealing cover plate near the edge.

[0008] Furthermore, there are a plurality of heat dissipation fins, which are evenly arranged on the curved surface of the motor housing, and there are five fixing screw grooves, which are evenly arranged on the curved surface of the motor housing.

[0009] Furthermore, the number of the screw fixing rings is five and they are evenly arranged and fixed at the edge of the sealing cover plate. The screw fixing rings are matched with the heat dissipation fins, and the output central shaft is movably mounted on the motor housing through a sealed bearing.

[0010] Furthermore, a fixing plate is fixedly mounted on the surface of the fixing mounting ring, and the fixing mounting ring is fixedly mounted inside the motor housing through the fixing plate.

[0011] Furthermore, a first bearing is fixedly installed in the middle sleeve hole of the motor rotor, the output center shaft is movably installed with the motor rotor through the first bearing, and the sun gear is fixedly installed on the rear surface of the motor rotor by bolts.

[0012] Furthermore, the planetary gear structure includes a planetary carrier and planetary wheels, the planetary wheels are movably mounted on the surface of the planetary carrier through bearings, there are three planetary wheels in total, and the planetary wheels are arranged in a circular array on the surface of the planetary carrier, and the rear end of the planetary carrier is movably mounted in the bearing groove through a second bearing.

[0013] Furthermore, the sun gear is meshed and connected at a middle position of the three planetary gears, and the ring gear is meshed and connected at the outer side surfaces of the three planetary gears. The sun gear, the planetary gear structure and the ring gear are combined into a complete planetary gear speed change mechanism.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] In the utility model, the brushless DC reduction motor is improved, and on the basis of the original brushless motor, a sun gear, a planetary gear structure and a gear ring are provided to form a built-in integrated planetary gear speed change mechanism. This integrated setting makes the volume smaller and lighter than the traditional motor and reducer combination after installation. The small volume makes the brushless DC reduction motor compatible with a variety of products of different specifications on the market, and the lightness makes it more convenient to move and transport. In addition, the brushless DC reduction motor does not require personnel to connect the motor and the reducer as in the traditional way, which greatly saves installation costs and installation time. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1This is a schematic diagram of the overall structure of a brushless DC reduction motor of the utility model;

[0017] Figure 2 This is an exploded view of a brushless DC reduction motor of the utility model;

[0018] Figure 3 This is a disassembled explosion display diagram of a second bearing and a bearing slot of a brushless DC reduction motor of the utility model;

[0019] Figure 4 This is an exploded partial view of a brushless DC reduction motor of the utility model;

[0020] Figure 5 This is a partial disassembly display diagram of a brushless DC reduction motor of the utility model.

[0021] In the figure: 1. motor housing; 101. cooling fins; 102. fixing screw slots; 103. sealed bearings; 2. sealing cover plate; 201. bearing slots; 202. screw fixing rings; 203. sealing gaskets; 3. fixed mounting rings; 301. fixing plates; 4. motor stators; 5. motor rotors; 501. first bearings; 6. sun gears; 7. planetary gear structures; 701. planet carriers; 702. planetary gears; 8. gear rings; 9. second bearings; 10. output center shafts. DETAILED DESCRIPTION

[0022] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0023] Embodiment 1:

[0024] like Figure 1-5 As shown, a brushless DC reduction motor comprises an output central shaft 10, a motor housing 1 is movably sleeved on the surface of the output central shaft 10, a fixed mounting ring 3 is sleeved on the surface of the output central shaft 10 located inside the motor housing 1, a motor stator 4 is fixedly sleeved on the surface of the fixed mounting ring 3, a motor rotor 5 is sleeved on the periphery of the motor stator 4 on the surface of the output central shaft 10, a sun gear 6 is fixedly mounted on the rear surface of the motor rotor 5, a planetary gear structure 7 is fixedly mounted on the surface of the output central shaft 10 located behind the sun gear 6, a gear ring 8 is fixedly mounted on the inside of the motor housing 1 near the port position, and a sealing cover plate 2 is fixedly mounted on the rear port of the motor housing 1;

[0025] A heat dissipation fin 101 is fixedly installed on the outer arc surface of the motor housing 1, a fixing screw groove 102 is fixedly installed on the outer arc surface of the motor housing 1 near the port position, and a sealing bearing 103 is fixedly embedded and installed in the front surface port of the motor housing 1; a bearing groove 201 is opened on the inner surface of the sealing cover plate 2, a screw fixing ring 202 is fixedly installed on the surface edge of the sealing cover plate 2, and a sealing gasket 203 is fixedly installed on the inner side surface of the sealing cover plate 2 near the edge position, and the sealing gasket 203 plays a sealing role when the motor housing 1 and the sealing cover plate 2 are packaged. The sealing cover plate 2 is screwed into the fixing screw groove 102 at the corresponding position through the bolts passing through the screw fixing ring 202 and fixedly installed with the motor housing 1; there are multiple heat dissipation fins 101, which are evenly arranged on the arc surface of the motor housing 1, and there are five fixing screw grooves 102, which are evenly arranged on the arc surface of the motor housing 1; there are five screw fixing rings 202, which are evenly arranged on the edge of the sealing cover plate 2 for fixing and installation, and the screw fixing ring 202 and the heat dissipation fin 101 are matched, and the output central shaft 10 is connected to the motor outer shell through the sealing bearing 103. The motor housing 1 is movably installed; a fixing plate 301 is fixedly installed on the surface of the fixing ring 3, and the fixing ring 3 is fixedly installed inside the motor housing 1 through the fixing plate 301, wherein a sleeve hole is opened in the middle of the fixing ring 3, and the sleeve hole does not contact the output middle shaft 10 to avoid friction and energy consumption; a first bearing 501 is fixedly installed in the middle sleeve hole of the motor rotor 5, and the output middle shaft 10 is movably installed with the motor rotor 5 through the first bearing 501, and the sun gear 6 is fixedly installed on the rear surface of the motor rotor 5 by bolts; the planetary gear structure 7 includes planetary The planetary gears 702 are movably mounted on the surface of the planetary gear carrier 701 through bearings. There are three planetary gears 702 in total, and the planetary gears 702 are arranged in a ring array on the surface of the planetary gear carrier 701. The rear end of the planetary gear carrier 701 is movably mounted in the bearing groove 201 through a second bearing 9. The sun gear 6 is meshed and connected at the middle position of the three planetary gears 702, and the ring gear 8 is meshed and connected on the outer side surfaces of the three planetary gears 702. The sun gear 6, the planetary gear structure 7 and the ring gear 8 are combined into a complete planetary gear speed change mechanism.

[0026] It should be noted that the utility model is a brushless DC reduction motor, and its working principle is: at startup, current is supplied to the motor stator 4, so that the motor rotor 5 rotates at high speed. At this time, the motor rotor 5 is connected to the output middle shaft 10 through the first bearing 501, so it will not drive the output middle shaft 10. At this time, the motor rotor 5 will drive the rear sun gear 6, and the sun gear 6 is meshed with the planetary gear 702 and driven. At the same time, the planetary gear 702 moves on the inner ring teeth of the ring gear 8, thereby driving the planetary carrier 701 to rotate at low speed and high torque. In this way, because the planetary carrier 701 is fixedly installed with the output middle shaft 10, the rotational torque force can be transmitted to the output middle shaft 10, and the output middle shaft 10 is output through the end to the required automated production machinery for use.

[0027] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A brushless DC reduction motor, characterized in that: The invention comprises an output central shaft (10), a motor housing (1) being movably sleeved on the surface of the output central shaft (10), a fixed mounting ring (3) being sleeved on the surface of the output central shaft (10) located inside the motor housing (1), a motor stator (4) being fixedly sleeved on the surface of the fixed mounting ring (3), a motor rotor (5) being sleeved on the periphery of the motor stator (4), a sun gear (6) being fixedly mounted on the rear surface of the motor rotor (5), a planetary gear structure (7) being fixedly mounted on the surface of the output central shaft (10) located behind the sun gear (6), a gear ring (8) being fixedly mounted inside the motor housing (1) near a port position, and a sealing cover plate (2) being fixedly mounted on the rear port of the motor housing (1).

2. A brushless DC reduction motor according to claim 1, characterized in that: A heat dissipation fin (101) is fixedly mounted on the outer arc surface of the motor housing (1), a fixing screw groove (102) is fixedly mounted on the outer arc surface of the motor housing (1) near the port, and a sealed bearing (103) is fixedly embedded in the front surface port of the motor housing (1).

3. A brushless DC reduction motor according to claim 2, characterized in that: A bearing groove (201) is provided on the inner surface of the sealing cover plate (2), a screw fixing ring (202) is fixedly mounted on the surface edge of the sealing cover plate (2), and a sealing gasket (203) is fixedly mounted on the inner side surface of the sealing cover plate (2) near the edge.

4. A brushless DC reduction motor according to claim 3, characterized in that: The heat dissipation fins (101) are provided in plurality and are evenly arranged on the arc surface of the motor housing (1); the fixing screw slots (102) are provided in five and are evenly arranged on the arc surface of the motor housing (1).

5. A brushless DC reduction motor according to claim 4, characterized in that: The screw fixing rings (202) are provided in five numbers and are evenly arranged and fixedly installed at the edge of the sealing cover plate (2); the screw fixing rings (202) and the heat dissipation fins (101) are arranged to match each other; and the output central shaft (10) is movably installed with the motor housing (1) via a sealing bearing (103).

6. A brushless DC reduction motor according to claim 5, characterized in that: A fixing plate (301) is fixedly mounted on the surface of the fixing installation ring (3), and the fixing installation ring (3) is fixedly mounted inside the motor housing (1) via the fixing plate (301).

7. A brushless DC reduction motor according to claim 6, characterized in that: A first bearing (501) is fixedly installed in the middle sleeve hole of the motor rotor (5), the output center shaft (10) is movably installed with the motor rotor (5) via the first bearing (501), and the sun gear (6) is fixedly installed on the rear surface of the motor rotor (5) via bolts.

8. The brushless DC reduction motor according to claim 7, characterized in that: The planetary gear structure (7) comprises a planet carrier (701) and planetary wheels (702), wherein the planetary wheels (702) are movably mounted on the surface of the planet carrier (701) via bearings, and there are three planetary wheels (702) in total, and the planetary wheels (702) are arranged in a ring array on the surface of the planet carrier (701), and the rear end of the planet carrier (701) is movably mounted in a bearing groove (201) via a second bearing (9).

9. A brushless DC reduction motor according to claim 8, characterized in that: The sun gear (6) is meshed and connected at a middle position of the three planetary gears (702), and the ring gear (8) is meshed and connected at the outer side surfaces of the three planetary gears (702). The sun gear (6), the planetary gear structure (7) and the ring gear (8) are combined into a complete planetary gear speed change mechanism.

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