Electric hair cutter with outer rotor motor

Abstract

The electric hair cutter comprises a motor assembly and a swing rod assembly, the swing rod assembly is in transmission connection with the motor assembly, the swing rod assembly comprises a swing rod, a first bearing, an eccentric wheel and a second bearing which are sequentially connected, the eccentric wheel is provided with an input rod and an output rod which are eccentrically arranged, the first bearing is arranged on the output rod in a sleeved mode, and the second bearing is arranged on the output rod. The second bearing sleeves the input rod; an opening for accommodating the first bearing is formed in one end, corresponding to the eccentric wheel, of the swing rod; the motor assembly comprises an outer rotor motor and a fixing frame used for installing the outer rotor motor, and an output shaft of the outer rotor motor is fixedly connected to an input rod of the eccentric wheel. According to the utility model, the output shaft of the outer rotor motor and the input rod of the eccentric wheel are circumferentially limited through the second bearing, so that when the outer rotor motor works, the shaking at the output shaft is greatly reduced, the working noise during the operation of the electric hair cutter is reduced, the energy loss during the power transmission process is also reduced, and the service life of the electric hair cutter is prolonged. And the service life of the product is prolonged.

Description

Technical Field

[0001] This utility model relates to the technical field of electric clipper equipment, and in particular to an electric clipper with an external rotor motor. Background Technology

[0002] Electric hair clippers are a well-known and commonly used tool for cutting hair and trimming fur. They are primarily used to trim human hair or animal fur. Electric hair clippers consist of a housing and a motor housed within it. A fixed blade is fixed at the front of the housing, and a moving blade is fixed to the front of the oscillating head via a oscillating frame. The moving blade and the fixed blade are positioned with a certain gap. The motor drives the moving blade to oscillate back and forth relative to the fixed blade, thus cutting and trimming the hair. Currently, most electric hair clippers use brushed internal rotor motors. The brushes are prone to damage after prolonged use, resulting in poor durability. External rotor motors, driven by a drive plate, can provide greater torque and are more efficient than internal rotor motors at the same speed. In the context of energy conservation and environmental protection, the replacement of internal rotor motors with external rotor motors in household appliances is a growing trend.

[0003] For example, Chinese Utility Model Patent (Announcement No.: CN214561103U) discloses an electric clipper driven by a brushless external rotor motor, including a cutter head assembly, a motor assembly, and a rocker arm transmission assembly. The cutter head assembly includes a fixed blade and a movable blade movably mounted on the fixed blade. The motor assembly includes a brushless external rotor motor, an eccentric output shaft, and a spherical bearing. The rocker arm transmission assembly is installed between the cutter head assembly and the motor assembly, including a positioning pin and a transmission rocker arm sleeved on the positioning pin and rotatable around the positioning pin. One end of the transmission rocker arm corresponding to the motor assembly forms a drive slot for accommodating the spherical bearing, and the other end of the transmission rocker arm corresponding to the cutter head assembly is used to drive the movable blade. Its structure is simple and reasonable. The use of a brushless external rotor motor increases the output torque at the same speed, effectively reduces the temperature rise of the cutter head, and enables direct drive, reducing noise. Furthermore, the use of a spherical bearing as the fulcrum between the motor output end and the rocker arm connection end reduces wear.

[0004] However, in the aforementioned prior art, an electric clipper driven by a brushless external rotor motor has its output shaft directly fixedly connected to one end of an eccentric output shaft, while the other end of the eccentric output shaft is connected to a transmission lever via a spherical bearing. This results in the motor's output shaft and the eccentric output shaft being suspended in mid-air. When the brushless external rotor motor is working, the output shaft of the motor vibrates significantly, leading to high product noise. It also increases energy loss during power transmission and shortens the product's lifespan.

[0005] Therefore, it is necessary to improve the existing technology. Utility Model Content

[0006] The purpose of this invention is to solve the problem that in the prior art, the output shaft of the external rotor motor and the eccentric output shaft are in a suspended state, resulting in large shaking at the output shaft of the brushless external rotor motor during operation, which leads to high product noise, increased energy loss during power transmission, and shortened product lifespan. Therefore, this invention proposes an electric clipper with an external rotor motor.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] An electric clipper with an external rotor motor includes a motor assembly and a rocker arm assembly. The rocker arm assembly is drively connected to the motor assembly. The rocker arm assembly includes a rocker arm, a first bearing, an eccentric wheel, and a second bearing connected in sequence. The eccentric wheel has an input rod and an output rod arranged eccentrically. The first bearing is sleeved on the output rod, and the second bearing is sleeved on the input rod. An opening for accommodating the first bearing is formed at one end of the rocker arm corresponding to the eccentric wheel. The motor assembly includes an external rotor motor and a mounting bracket for mounting the external rotor motor. The output shaft of the external rotor motor is fixedly connected to the input rod of the eccentric wheel. The mounting bracket is provided with a first arc-shaped mounting groove for mounting the second bearing, and a first arc-shaped pressure block for fixing the outer ring of the second bearing is connected to the first arc-shaped mounting groove.

[0009] Furthermore, a cylindrical boss is provided at the end of the external rotor motor away from the output shaft. The cylindrical boss is coaxial with the output shaft. The fixing frame is provided with a second arc-shaped mounting groove for mounting the cylindrical boss. A second arc-shaped pressure block for circumferentially limiting the cylindrical boss is connected to the second arc-shaped mounting groove.

[0010] Furthermore, it also includes a lower housing, in which both the motor assembly and the rocker arm assembly are installed.

[0011] Furthermore, the external rotor motor is fixedly installed to the lower housing via a mounting bracket.

[0012] Furthermore, it also includes a cutter head assembly installed at the front end of the lower housing, the swing arm assembly being installed between the cutter head assembly and the motor assembly, the cutter head assembly including a fixed blade and a movable blade movably mounted on the fixed blade.

[0013] Furthermore, the swing arm assembly also includes a positioning pin that is vertically fixed on the lower housing. The swing arm is oscillatingly connected to the lower housing through the positioning pin, and one end of the swing arm corresponding to the cutter head assembly is used to drive the moving blade to reciprocate left and right.

[0014] Furthermore, the first bearing is a spherical bearing, and the inner ring of the spherical bearing is fixedly connected to the output rod of the eccentric wheel.

[0015] Furthermore, the inner ring of the second bearing is fixedly connected to the output shaft of the outer rotor motor.

[0016] The beneficial effects of this utility model after adopting the above structure are as follows: The electric clipper with an external rotor motor of this utility model includes a motor assembly and a swing arm assembly. The swing arm assembly is connected to the motor assembly in a transmission manner. The swing arm assembly includes a swing arm, a first bearing, an eccentric wheel, and a second bearing connected in sequence. The eccentric wheel has an input rod and an output rod arranged eccentrically. The first bearing is sleeved on the output rod, and the second bearing is sleeved on the input rod. An opening for accommodating the first bearing is formed at one end of the swing arm corresponding to the eccentric wheel. The motor assembly includes an external rotor motor and a fixing frame for mounting the external rotor motor. The output shaft of the external rotor motor is fixedly connected to the input rod of the eccentric wheel. The fixing frame is provided with a first arc-shaped mounting groove for mounting the second bearing. A first arc-shaped pressure block for fixing the outer ring of the second bearing is connected to the first arc-shaped mounting groove. This invention uses a second bearing to circumferentially limit the output shaft of the external rotor motor and the input rod of the eccentric wheel, which greatly reduces the shaking of the output shaft when the external rotor motor is working, reduces the working noise during electric shearing operations, and also reduces energy loss during power transmission, thus helping to extend the product's service life. Attached Figure Description

[0017] To more clearly illustrate the specific embodiments of this utility model, the accompanying drawings used in the description of the specific embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a cross-sectional view of the overall structure of this utility model (the upper housing is not shown).

[0019] Figure 2 This is the utility model Figure 1 Enlarged schematic diagram of the structure at point A;

[0020] Figure 3 This is a three-dimensional schematic diagram of the overall structure of this utility model (the upper housing is not shown).

[0021] Figure 4 This is a schematic diagram of the connection between the external rotor motor and the rocker arm assembly of this utility model;

[0022] Figure 5 This is an exploded view of the motor assembly and the swing arm assembly of this utility model;

[0023] Figure 6 This is a three-dimensional schematic diagram of the eccentric wheel of this utility model;

[0024] Figure 7 This is a three-dimensional schematic diagram of the swing arm of this utility model.

[0025] Figures 1 to 7 The winning number is:

[0026] 1. Motor assembly; 11. External rotor motor; 111. Output shaft; 112. Columnar boss; 12. Fixing bracket; 121. First arc-shaped mounting groove; 122. First arc-shaped pressure block; 123. Second arc-shaped mounting groove; 124. Second arc-shaped pressure block; 2. Rocker arm assembly; 21. Rocker arm; 211. Opening; 22. First bearing; 23. Eccentric wheel; 231. Input rod; 232. Output rod; 24. Second bearing; 25. Positioning pin; 3. Lower housing; 4. Cutter head assembly; 41. Fixed blade; 42. Moving blade. Detailed Implementation

[0027] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0028] In the description of this utility model, it should be understood that if terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0029] 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 technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, the term "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0030] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0031] In this utility model, unless otherwise explicitly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact, or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0032] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this invention are for illustrative purposes only and do not represent the only possible implementation.

[0033] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other. The present utility model will now be described in detail with reference to the accompanying drawings and embodiments.

[0034] like Figures 1 to 7As shown, an electric clipper with an external rotor motor includes a motor assembly 1 and a rocker arm assembly 2. The rocker arm assembly 2 is drively connected to the motor assembly 1. The rocker arm assembly 2 includes a rocker arm 21, a first bearing 22, an eccentric wheel 23, and a second bearing 24 connected in sequence. The eccentric wheel 23 has an input rod 231 and an output rod 232 arranged eccentrically. The first bearing 22 is sleeved on the output rod 232, and the second bearing 24 is sleeved on the input rod 231. The rocker arm 21 has an opening 211 at one end corresponding to the eccentric wheel 23 for accommodating the first bearing 22. The motor assembly 1 includes an external rotor motor 11 and a mounting bracket 12 for mounting the external rotor motor 11. The output shaft 111 of the external rotor motor 11 is fixedly connected to the input rod 231 of the eccentric wheel 23. The mounting bracket 12 is provided with a first arc-shaped mounting groove 121 for mounting the second bearing 24. A first arc-shaped pressure block 122 for fixing the outer ring of the second bearing 24 is connected to the first arc-shaped mounting groove 121. The inner ring of the second bearing 24 is fixedly connected to the output shaft 111 of the outer rotor motor 11.

[0035] Based on the above embodiments, the present invention aims to provide an electric clipper with an external rotor motor, including a motor assembly 1 and a rocker arm assembly 2. The rocker arm assembly 2 is drively connected to the motor assembly 1. The rocker arm assembly 2 includes a rocker arm 21, a first bearing 22, an eccentric wheel 23, and a second bearing 24 connected in sequence. The eccentric wheel 23 has an input rod 231 and an output rod 232 arranged eccentrically. The first bearing 22 is sleeved on the output rod 232, and the second bearing 24 is sleeved on the input rod 231. One end of rod 21 corresponding to the eccentric wheel 23 has an opening 211 for accommodating the first bearing 22. The motor assembly 1 includes an external rotor motor 11 and a mounting bracket 12 for mounting the external rotor motor 11. The output shaft 111 of the external rotor motor 11 is fixedly connected to the input rod 231 of the eccentric wheel 23. The mounting bracket 12 is provided with a first arc-shaped mounting groove 121 for mounting the second bearing 24. A first arc-shaped pressure block 122 for fixing the outer ring of the second bearing 24 is connected to the first arc-shaped mounting groove 121. This utility model uses the second bearing 24 to circumferentially limit the output shaft 111 of the external rotor motor 11 and the input rod 231 of the eccentric wheel 23, which greatly reduces the shaking of the output shaft 111 when the external rotor motor 11 is working, reduces the working noise during electric clipper operation, and also reduces energy loss in the power transmission process, which helps to improve the service life of the product.

[0036] As another preferred embodiment of this utility model, a cylindrical boss 112 is provided at the end of the external rotor motor 11 away from the output shaft 111. The cylindrical boss 112 is coaxially arranged with the output shaft 111. A second arc-shaped mounting groove 123 for mounting the cylindrical boss 112 is provided on the fixing frame 12. A second arc-shaped pressure block 124 for circumferentially limiting the cylindrical boss 112 is connected to the second arc-shaped mounting groove 123. A lower housing 3 is also included, and the motor assembly 1 and the swing arm assembly 2 are both installed inside the lower housing 3. The external rotor motor 11 is fixedly mounted to the lower housing 3 by the fixing frame 12. In this embodiment, as... Figure 5 As shown, the circumferential positioning of the cylindrical boss 112 of the external rotor motor 11 is achieved by the second arc-shaped pressure block 124 and the second arc-shaped mounting groove 123. The circumferential positioning of the output shaft 111 of the external rotor motor 11 is achieved by the first arc-shaped pressure block 122, the first arc-shaped mounting groove 121 and the second bearing 24. The positioning of the external rotor motor 11 in the vertical, front-back and left-right directions is achieved by the fixing bracket 12 fixedly connected to the lower housing 3. In this way, the external rotor motor 11 is constrained and positioned in all directions, thereby ensuring the installation stability and reliability of the external rotor motor 11 in the lower housing 3 of the electric clipper.

[0037] As another preferred embodiment of this utility model, it further includes a cutter head assembly 4 installed at the front end of the lower housing 3. The swing arm assembly 2 is installed between the cutter head assembly 4 and the motor assembly 1. The cutter head assembly 4 includes a fixed blade 41 and a movable blade 42 movably installed on the fixed blade 41. The swing arm assembly 2 also includes a positioning pin 25 vertically fixedly installed on the lower housing 3. The swing arm 21 is oscillatingly connected to the lower housing 3 through the positioning pin 25. One end of the swing arm 21 corresponding to the cutter head assembly 4 is used to drive the movable blade 42 to reciprocate left and right. In this embodiment, as... Figure 3 and Figure 4 As shown, the lower end of the positioning pin 25 is fixedly installed on the lower housing 3, and the middle part of the swing rod 21 is rotatably sleeved on the positioning pin 25 so that the swing rod 21 can swing left and right around the positioning pin 25. The specific working process is as follows: the external rotor motor 11 drives the spherical bearing to rotate to collide with the opposite side walls of the opening 211 to drive the swing rod 21 to swing left and right around the positioning pin 25. The swing rod 21 drives the moving blade 42 to reciprocate left and right on the fixed blade 41 of the cutter head assembly 4 to realize the function of cutting and trimming hair.

[0038] As another preferred embodiment of this utility model, the first bearing 22 is a spherical bearing, and the inner ring of the spherical bearing is fixedly connected to the output rod 232 of the eccentric wheel 23. In this embodiment, as... Figure 5 As shown, a spherical bearing is used as the fulcrum at the connection end between the eccentric wheel 23 and the rocker arm 21, which minimizes the wear of the rocker arm 21 by friction during transmission, thereby improving the service life of the product.

[0039] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this utility model.

Claims

1. An electric clipper with an external rotor motor, comprising a motor assembly (1) and a rocker arm assembly (2), wherein the rocker arm assembly (2) is drively connected to the motor assembly (1), characterized in that: The rocker arm assembly (2) includes a rocker arm (21), a first bearing (22), an eccentric wheel (23), and a second bearing (24) connected in sequence. The eccentric wheel (23) has an input rod (231) and an output rod (232) arranged eccentrically. The first bearing (22) is sleeved on the output rod (232), and the second bearing (24) is sleeved on the input rod (231). The rocker arm (21) has an opening (211) at one end corresponding to the eccentric wheel (23) for accommodating the first bearing (22). The motor assembly (1) includes an external rotor motor (11) and a mounting bracket (12) for mounting the external rotor motor (11). The output shaft (111) of the external rotor motor (11) is fixedly connected to the input rod (231) of the eccentric wheel (23). The mounting bracket (12) is provided with a first arc-shaped mounting groove (121) for mounting the second bearing (24). A first arc-shaped pressure block (122) for fixing the outer ring of the second bearing (24) is connected to the first arc-shaped mounting groove (121).

2. The electric clipper with an external rotor motor according to claim 1, characterized in that: A cylindrical boss (112) is provided at one end of the external rotor motor (11) away from the output shaft (111). The cylindrical boss (112) is coaxial with the output shaft (111). A second arc-shaped mounting groove (123) for mounting the cylindrical boss (112) is provided on the fixing frame (12). A second arc-shaped pressure block (124) for circumferentially limiting the cylindrical boss (112) is connected to the second arc-shaped mounting groove (123).

3. The electric clipper with an external rotor motor according to claim 1, characterized in that: It also includes a lower housing (3), in which the motor assembly (1) and the rocker arm assembly (2) are both installed.

4. The electric clipper with an external rotor motor according to claim 3, characterized in that: The external rotor motor (11) is fixedly installed to the lower housing (3) by a fixing bracket (12).

5. The electric clipper with an external rotor motor according to claim 3, characterized in that: It also includes a cutter head assembly (4) installed at the front end of the lower housing (3), the swing arm assembly (2) is installed between the cutter head assembly (4) and the motor assembly (1), the cutter head assembly (4) includes a fixed blade (41) and a movable blade (42) movably installed on the fixed blade (41).

6. The electric clipper with an external rotor motor according to claim 5, characterized in that: The swing arm assembly (2) also includes a positioning pin (25) that is vertically fixed on the lower housing (3). The swing arm (21) is oscillatingly connected to the lower housing (3) through the positioning pin (25). One end of the swing arm (21) corresponding to the cutter head assembly (4) is used to drive the moving blade (42) to reciprocate left and right.

7. The electric clipper with an external rotor motor according to claim 1, characterized in that: The first bearing (22) is a spherical bearing, and the inner ring of the spherical bearing is fixedly connected to the output rod (232) of the eccentric wheel (23).

8. The electric clipper with an external rotor motor according to claim 1, characterized in that: The inner ring of the second bearing (24) is fixedly connected to the output shaft (111) of the outer rotor motor (11).

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