Brushless gear motor

Abstract

The utility model discloses a brushless gear motor, an outer rotor motor adopts a brushless motor structure, and the outer rotor motor is installed in an installation shell; an outer rotor of the outer rotor motor is in clearance fit with the mounting shell; the planetary gear set is arranged on the planetary gear carrier, and the planetary gear carrier is installed in the reduction gearbox shell to form a reduction gearbox structure. The output shaft is installed at the shaft output end of the reduction gearbox shell and is in transmission fit with the planetary gear set. A rotating shaft of the outer rotor motor extends outwards and is in transmission fit with the planetary gear set in the reduction gearbox shell. A brushless motor structure is adopted, compared with a traditional brush motor, the performance is improved by about 30%, a rotor part does not directly generate friction with electrodes, sparks and powder are not generated, the overall efficiency is higher, and the service life is longer. The hidden outer rotor structure effect is achieved, the outer rotor motor is protected through the installation shell, and the installation difficulty of the outer rotor motor is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of motor structures and relates to a brushless reduction motor. Background Art

[0002] A reduction motor is an integrated unit of a reducer and an electric motor. This integrated unit is also commonly referred to as a gear motor or gear motor. In the prior art, in order to meet the requirements of high torque and high efficiency, an outer rotor motor structure is generally used as the power source.

[0003] However, the reduction motor structure in the prior art mainly has the following technical defects:

[0004] 1. Currently, most of the reduction motors in this series on the market use a brush motor structure, which has low torque, short life, high power, fast wear of carbon brushes, produces carbon powder after use, and generates sparks during operation.

[0005] 2. The external rotor motor in the current reduction motor has high installation requirements and certain limitations because the rotor is partially exposed.

[0006] 3. Currently, the supporting bearing structure in the motor structure mostly adopts oil-containing bearing structure, which wears out quickly and has a short life, affecting the overall performance of the motor.

[0007] 4. The screw holes in the current motor structure are concave in design, and the screws will extend into the housing, compressing the internal installation space, making the motor installation more difficult and reducing motor performance.

[0008] 5. The internal gear structure of the reducer on the market mainly adopts a plastic gear structure, which reduces the gear strength and service life of the reducer. Utility Model Content

[0009] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0010] A brushless reduction motor, comprising: a mounting housing, an outer rotor motor, a reduction gearbox housing, a planetary gear carrier, a planetary gear set, a connecting plate, and an output shaft;

[0011] The installation housing and the reduction gearbox housing are connected as one piece through a connecting plate;

[0012] The outer rotor motor adopts a brushless motor structure, and the outer rotor motor is installed in a mounting housing; and the outer rotor of the outer rotor motor and the mounting housing are clearance-matched;

[0013] The planetary gear set is set on the planetary gear carrier, and the planetary gear carrier is installed in the reduction gear box housing to form a reduction gear box structure; the output shaft is installed at the output shaft end of the reduction gear box housing and cooperates with the planetary gear set;

[0014] The rotating shaft of the outer rotor motor extends outward and is in transmission cooperation with the planetary gear set in the reduction gearbox housing.

[0015] As a further solution of the present invention: bearing cavities are formed at both ends of the mounting housing in the axial direction, and motor support bearings are arranged in the bearing cavities, and the motor support bearings adopt a ball bearing structure;

[0016] Both ends of the rotating shaft are supported by motor support bearings, thereby achieving the fixation of the outer rotor motor in the mounting housing.

[0017] As a further solution of the present invention: a group of output support bearings are provided at the shaft output end of the reduction gearbox housing, and the output support bearings adopt a ball bearing structure.

[0018] As a further solution of the present invention: an outwardly protruding connecting stud is provided on the connecting end surface of the mounting shell and the connecting plate, and a mounting through-hole corresponding to the connecting stud is provided in the connecting plate; the connecting stud is inserted into the mounting through-hole, and then the connection between the mounting shell and the connecting plate is achieved by screws.

[0019] As a further solution of the present invention, each gear in the planetary gear set adopts a full powder metallurgy gear structure.

[0020] Beneficial effects of the utility model:

[0021] 1. The brushless motor structure improves the performance by about 30% compared with the traditional brushed motor. The rotor part does not directly rub against the electrode and will not produce sparks or powder, and the overall efficiency and service life are higher.

[0022] 2. Achieve the effect of hidden outer rotor structure, protect the outer rotor motor by installing the outer shell, and reduce the difficulty of installing the outer rotor motor.

[0023] 3. The ball bearing is used to replace the traditional oil-containing bearing structure, which makes the rotation smoother and has a longer working life.

[0024] 4. The mounting screw holes of the mounting housing are designed to protrude outwards, which frees up the internal space of the housing and reserves sufficient space for the installation of the external rotor motor, thus reducing the difficulty of motor installation and fully improving the stability and performance of the motor.

[0025] 5. Each gear in the planetary gear set adopts a full powder metallurgy gear structure, which has strong rigidity and longer service life as a whole. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic structural diagram of the utility model.

[0027] Figure 2 This is another structural diagram of the utility model. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. It should be understood that this application is not limited to the example embodiments disclosed herein. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0029] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0030] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "plurality" means two or more, unless otherwise specifically defined.

[0031] In the embodiments of the present invention, unless otherwise expressly specified or limited, the terms "installed," "connected," "connected," "fixed," etc. should be understood in a broad sense. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, indirect connection through an intermediate medium; internal communication between two components, or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0032] See also Figures 1-2In the embodiment of the present invention, the brushless reduction motor includes: a mounting housing 1, an outer rotor motor 2, a reduction box housing 6, a planetary gear carrier 9, a planetary gear set 5, a connecting plate 4 and an output shaft 8;

[0033] The mounting housing 1 and the reduction gearbox housing 6 are integrally connected by respectively being threadedly connected to the connecting plate 4;

[0034] The outer rotor motor 2 adopts a brushless motor structure and is installed in the mounting housing 1. The outer rotor motor 2 consists of an outer rotor 21, a stator assembly 22, and a rotating shaft 23. The stator assembly 22 is located inside the outer rotor 21, and the rotating shaft 23 is located at the center of the stator assembly 22, passing through the outer rotor 21 and fixedly connected thereto. The outer rotor 21 of the outer rotor motor 2 is clearance-matched with the mounting housing 1 to achieve a hidden outer rotor 21 structure. The mounting housing 1 protects the outer rotor motor 2 and reduces the difficulty of installing the outer rotor motor 2.

[0035] The planetary gear set 5 is arranged on the planetary gear carrier 9, and the planetary gear carrier 9 is installed in the reduction gear box housing 6 to form a reduction gear box structure; the output shaft 8 is installed at the shaft end position of the reduction gear box housing 6 and is in transmission cooperation with the planetary gear set 5;

[0036] The rotating shaft 23 of the outer rotor motor 2 extends outward and cooperates with the planetary gear set 5 in the reduction gearbox housing 6 to provide power output to the output shaft 8.

[0037] Furthermore, bearing cavities (not shown) are formed at both ends of the mounting shell 1 in the axial direction, and motor support bearings 10 are arranged in the bearing cavities; both ends of the rotating shaft 23 are supported by the motor support bearings 10, thereby providing a balanced support force for the rotating shaft 23 and realizing the fixing of the outer rotor motor 2 in the mounting shell 1.

[0038] In addition, a set of limit springs 3 are provided at the shaft end of the outer rotor motor 2. The limit springs 3 are nested on the rotating shaft 23 and respectively abut against the motor support bearing 10 and the outer rotor 21 on this side to avoid position displacement of the motor support bearing 10 on this side.

[0039] Furthermore, a set of output support bearings 7 is provided at the shaft output end of the reduction gearbox housing 6 to provide structural support for the output shaft 8 and improve the stability of the output working of the output shaft 8 .

[0040] Furthermore, the motor support bearing 10 and the output support bearing 7 both adopt a ball bearing structure, which rotates more smoothly and has a longer service life than a traditional oil-containing bearing structure.

[0041] Furthermore, an outwardly protruding connecting stud 11 is provided on the connecting end surface of the mounting shell 1 and the connecting plate 4, and a mounting through-hole 41 corresponding to the connecting stud 11 is provided in the connecting plate 4; the connecting stud 11 is inserted into the mounting through-hole 41, and then the connection between the mounting shell 1 and the connecting plate 4 is achieved by screws; through this structural method, the technical feature of the outwardly protruding mounting screw hole of the mounting shell 1 can be achieved, thereby achieving the effect of releasing the internal space of the mounting shell 1, reserving sufficient installation space for the installation of the outer rotor motor 2, reducing the difficulty of installing the motor, and fully improving the stability and performance of the motor.

[0042] Furthermore, each gear in the planetary gear set 5 adopts a full powder metallurgy gear structure, which has strong rigidity and longer service life as a whole.

[0043] It should also be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article, or device comprising the element.

[0044] The above description of the disclosed embodiments will enable one skilled in the art to implement or use the present application. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application is not limited to the embodiments shown herein, but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. Brushless reduction motor, characterized in that, include: Install the housing, outer rotor motor, reduction gearbox housing, planetary gear carrier, planetary gear set, connecting plate and output shaft; The installation housing and the reduction gearbox housing are connected as one piece through a connecting plate; The outer rotor motor adopts a brushless motor structure, and the outer rotor motor is installed in a mounting housing; and the outer rotor of the outer rotor motor and the mounting housing are clearance-matched; The planetary gear set is set on the planetary gear carrier, and the planetary gear carrier is installed in the reduction gear box housing to form a reduction gear box structure; the output shaft is installed at the output shaft end of the reduction gear box housing and cooperates with the planetary gear set; The rotating shaft of the outer rotor motor extends outward and is driven by the planetary gear set in the reduction gearbox housing.

2. The brushless reduction motor according to claim 1, characterized in that: Bearing cavities are formed at both ends of the mounting housing in the axial direction, and motor support bearings are arranged in the bearing cavities. The motor support bearings adopt a ball bearing structure; Both ends of the rotating shaft are supported by motor support bearings, thereby achieving the fixation of the outer rotor motor in the mounting housing.

3. The brushless reduction motor according to claim 1, characterized in that: A set of output support bearings is provided at the shaft end of the reduction gearbox housing, and the output support bearings adopt a ball bearing structure.

4. The brushless reduction motor according to claim 1, characterized in that: The connecting end surface of the mounting shell and the connecting plate is provided with a connecting stud protruding outward, and the connecting plate is provided with a mounting through-hole corresponding to the connecting stud; the connecting stud is inserted into the mounting through-hole, and then the connection between the mounting shell and the connecting plate is achieved by screws.

5. The brushless reduction motor according to claim 1, characterized in that: Each gear in the planetary gear set adopts a full powder metallurgy gear structure.

Images