Outer rotor roller motor and electric roller

Abstract

The embodiment of the utility model provides an outer rotor roller motor and an electric roller. The outer rotor roller motor comprises a shell, a permanent magnet, a fixed shaft, an electromagnetic winding and a driving plate. Wherein the shell is provided with a hollow cavity; the permanent magnet is fixedly arranged on the inner surface of the shell; the fixing shaft is arranged in the shell in a penetrating mode and arranged in the axial direction of the shell. The electromagnetic winding is connected with the fixed shaft, and the electromagnetic winding and the permanent magnet are oppositely arranged; the driving plate is fixedly connected with the fixing shaft, located in the shell and electrically connected with the electromagnetic winding. As the driving plate is arranged in the shell, the overall size of the outer rotor roller motor can be reduced, and the installation space outside the motor is saved.

Description

Technical Field

[0001] This application relates to the technical field of logistics equipment, and particularly relates to an external rotor roller motor and an electric roller. Background Art

[0002] An electric roller is a component applied to an industrial automation conveying system, and it can provide continuous or intermittent power transmission. Due to its characteristics of compact structure, simple installation, stable operation, energy conservation and environmental protection, the electric roller has been widely used in modern logistics, manufacturing and other fields, such as being applied in a roller conveyor line.

[0003] However, during the operation of the electric roller, the electric roller will generate noise. Summary of the Utility Model

[0004] An embodiment of this application provides a silent roller to solve the problem of noise generated during the operation of the electric roller in the prior art.

[0005] In a first aspect, an embodiment of this application provides an external rotor roller motor, including:

[0006] A housing having a hollow chamber;

[0007] A permanent magnet fixedly arranged on the inner surface of the housing;

[0008] A fixed shaft axially passing through the housing;

[0009] An electromagnetic winding fixedly connected to the fixed shaft, and the electromagnetic winding is arranged opposite to the permanent magnet in position;

[0010] A driving board fixedly connected to the fixed shaft, the driving board is located inside the housing, and the driving board is electrically connected to the electromagnetic winding.

[0011] In a feasible implementation manner, the fixed shaft has a cavity, and the fixed shaft is provided with a through hole communicating with the cavity, and a cable passes through the cavity and the through hole to be electrically connected to the driving board.

[0012] In a feasible implementation manner, the external rotor roller motor further includes a first bearing, the first bearing is fixedly connected to the first end of the housing, and the fixed shaft passes through the first bearing.

[0013] In a feasible implementation manner, the external rotor roller motor further includes a second bearing, the second bearing is fixedly connected to the second end of the housing, and the fixed shaft passes through the second bearing.

[0014] In a feasible implementation manner, the external rotor roller motor further includes a bearing seat, the bearing seat is fixedly connected to the first end of the housing, and the first bearing is fixedly arranged in the bearing seat.

[0015] In a feasible implementation, the outer rotor roller motor further includes an elastic member, and two ends of the elastic member are directly or indirectly abutted against the fixed shaft and the second bearing respectively.

[0016] In a feasible implementation, the outer rotor roller motor further includes a Hall plate, the Hall plate is connected to the fixed shaft, and the Hall plate is located inside the housing.

[0017] In a feasible implementation, the permanent magnet includes a plurality of magnetic pole pieces attached to the inner surface of the housing, the magnetic pole pieces include a first magnetic pole piece and a second magnetic pole piece, the first magnetic pole piece and the second magnetic pole piece have opposite polarities, and the two are arranged alternately.

[0018] In a second aspect, an embodiment of the present application provides an electric roller, including a cylinder body and an outer rotor roller motor according to any one of the first aspect;

[0019] The outer rotor roller motor is arranged inside the cylinder body.

[0020] In a feasible implementation, the electric roller further includes a shock-absorbing seat, the shock-absorbing seat is arranged inside the cylinder body, and the housing of the outer rotor roller motor is fixedly connected to the cylinder body through a bearing seat and a shock-absorbing seat; the first end of the housing is connected to the cylinder body through a bearing seat, and the second end of the housing is connected to the cylinder body through a shock-absorbing seat.

[0021] In a feasible implementation, shock-absorbing claws are circumferentially and evenly distributed on the shock-absorbing seat, the shock-absorbing claws protrude from the shock-absorbing seat, and the shock-absorbing claws abut against the inner surface of the cylinder body.

[0022] In a first aspect, an embodiment of the present application provides an outer rotor roller motor, including a housing, a permanent magnet, a fixed shaft, an electromagnetic winding and a driving board. Among them, the housing has a hollow chamber; the permanent magnet is fixedly arranged on the inner surface of the housing; the fixed shaft is arranged in the housing, and the fixed shaft is arranged along the axial direction of the housing; the electromagnetic winding is fixedly connected to the fixed shaft, and the electromagnetic winding is arranged opposite to the permanent magnet; the driving board is fixedly connected to the fixed shaft, the driving board is located inside the housing, and the driving board is electrically connected to the electromagnetic winding. Since the driving board is arranged inside the housing, the overall volume of the outer rotor roller motor can be reduced, and the installation space outside the motor can be saved.

[0023] In a second aspect, an embodiment of the present application provides an electric roller, including a cylinder body and an outer rotor roller motor according to any one of the first aspect. Among them, the outer rotor roller motor is arranged inside the cylinder body. The outer rotor roller motor and the cylinder body are designed in a split manner. When the outer rotor roller motor or the cylinder body has problems, the two can be separated and replaced or repaired, which greatly reduces the maintenance difficulty of the electric roller and improves the maintenance efficiency. In addition, since the electric roller includes the outer rotor roller motor in any of the above technical solutions, it has all the beneficial effects of the outer rotor roller motor in any of the above technical solutions, which will not be elaborated here. Description of the Drawings

[0024] The accompanying drawings described herein are used to provide a further understanding of the present utility model, and constitute a part of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present application, and do not constitute an improper limitation of the present utility model.

[0025] In the accompanying drawings:

[0026] Figure 1 is a schematic structural diagram of an outer rotor roller motor provided by an embodiment of the present application;

[0027] Figure 2 is a schematic structural diagram of an electric roller provided by an embodiment of the present application.

[0028] Description of the reference numerals in the drawings:

[0029] 100 - outer rotor roller motor; 200 - cylinder body;

[0030] 110 - housing; 120 - permanent magnet; 130 - fixed shaft; 140 - electromagnetic winding; 150 - drive plate; 160 - first bearing; 170 - second bearing; 180 - bearing seat; 190 - elastic member; 1100 - Hall plate; 1110 - shock absorber seat; 1120 - lock nut;

[0031] 1111 - shock absorber claw; 1310 - through hole. Detailed implementation manners

[0032] In order to enable those skilled in the art to better understand the technical solutions in the present application, the following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present application.

[0033] In the description of the embodiments of the present application, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present application, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0034] In this application, unless otherwise clearly defined or limited, terms such as "installed", "connected", "linked", "fixed", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the internal communication of two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0035] In this application, unless otherwise clearly defined or limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over", and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature is at a higher horizontal level than the second feature. The first feature being "under", "beneath", and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature is at a lower horizontal level than the second feature.

[0036] An electric roller is a component applied to an industrial automation conveying system, which can provide continuous or intermittent power transmission. Due to its characteristics of compact structure, simple installation, stable operation, energy conservation and environmental protection, the electric roller has been widely used in modern logistics, manufacturing and other fields, such as being applied in a roller conveyor line.

[0037] In the related art, an external rotor roller motor is provided in the electric roller, and the driver of the external rotor roller motor is arranged outside the external rotor roller motor, making the whole external rotor roller motor relatively large and occupying installation space.

[0038] To solve the above problems, an embodiment of this application provides an external rotor roller motor and an electric roller. The following will detail the solution provided by the embodiment of this application with reference to the accompanying drawings of the specification.

[0039] Figure 1 It is a schematic structural diagram of an external rotor roller motor provided by an embodiment of this application.

[0040] Refer to Figures 1 to 2As shown in the figure, an embodiment of the present application provides an outer-rotor roller motor, which includes a housing 110, a permanent magnet 120, a fixed shaft 130, an electromagnetic winding 140, and a drive plate 150. Among them, the housing 110 is a cylindrical structure with a first end and a second end, including a side wall and a bottom wall, and the side wall and the bottom wall enclose a hollow chamber. The top of the hollow chamber (i.e., at the first end of the housing 110) has an opening, and the bottom of the hollow chamber (i.e., at the second end of the housing 110) is closed by the bottom wall. The housing 110 can be made of metal or other materials, and the housing 110 can provide protection for the components arranged inside it. In some examples, the diameter of a part of the side wall of the housing 110 close to the bottom wall is smaller than the diameter of the part of the side wall far from the bottom wall, so as to facilitate fixing the housing 110 with a fixing member.

[0041] The permanent magnet 120 can be a natural magnet, which is fixedly arranged on the inner surface of the housing 110 around the circumferential direction of the housing 110, thereby generating a magnetic field inside the housing 110. Exemplarily, the permanent magnet 120 can include several magnetic pole pieces attached to the inner surface of the housing. The magnetic pole pieces include a first magnetic pole piece and a second magnetic pole piece. The first magnetic pole piece and the second magnetic pole piece have opposite polarities, and multiple first magnetic pole pieces and multiple second magnetic pole pieces are arranged alternately, thereby forming a magnetic field for driving the relative rotation of the housing 110 and the electromagnetic winding 140.

[0042] The fixed shaft 130 can be a multi-sided motor shaft. For example, it is a hexagonal motor shaft with a regular hexagonal cross-section. It can be understood that when the cross-section of the fixed shaft 130 is polygonal, the fixed shaft 130 is convenient to be fixed, so as to avoid relative rotation with the fixing member.

[0043] The electromagnetic winding 140 can generate a magnetic field under the action of current. The electromagnetic winding 140 is fixedly installed on the fixed shaft 130. Specifically, the electromagnetic winding 140 includes a silicon steel sheet group and a coil. The silicon steel sheet group includes multiple silicon steel sheets, and the multiple silicon steel sheets are closely attached together to form the silicon steel sheet group. The silicon steel sheet group is arranged around the circumferential direction of the fixed shaft 130, and the coil is wound around the silicon steel sheet group.

[0044] The multi-sided motor shaft fixed with the electromagnetic winding 140 is axially arranged in the housing 110 along the axial direction of the housing 110, and the electromagnetic winding 140 and the permanent magnet 120 are arranged opposite to each other. It can be understood that when the coil in the electromagnetic winding 140 is energized, it can generate a magnetic field. Under the interaction of the magnetic field generated by the electromagnetic winding 140 and the magnetic field generated by the permanent magnet 120, the multi-sided motor shaft and the housing 110 will rotate relatively.

[0045] In addition, the drive board 150 can be used to change the direction and magnitude of the current in the electromagnetic winding 140, thereby changing the direction and intensity of the magnetic field generated by the electromagnetic winding 140, and further changing the relative rotation speed or rotation direction between the fixed shaft 130 and the housing 110. Moreover, the drive board 150 is fixedly installed on the fixed shaft 130, and the drive board 150 is located inside the housing 110. Exemplarily, the drive board 150 is fixedly sleeved on the fixed shaft 130, and the drive board 150 is on the side close to the opening of the housing 110. Since the drive board 150 is arranged inside the housing 110, the overall volume of the outer rotor roller motor 100 can be reduced, and the installation space outside the outer rotor roller motor can be saved.

[0046] It can be understood that the drive board 150 includes an input end and an output end. One side of the input end of the drive board 150 can be connected to a power supply and a controller, and the output end of the drive board 150 is electrically connected to the electromagnetic winding 140 through a wire. The connection manner of the drive board 150, the power supply and the controller is the prior art in this field and will not be elaborated here.

[0047] Continue to refer to Figure 1 As shown, the fixed shaft 130 has a cavity inside, and one end of the fixed shaft 130 located outside the housing 110 has an opening communicating with the cavity. In addition, a through hole 1310 communicating with the cavity is provided on the part of the fixed shaft 130 located inside the housing 110. A cable (such as a power cable, a control cable, etc.) can enter the cavity from the opening at the end of the fixed shaft 130, and then pass through the cavity and the through hole 1310 on the fixed shaft 130 to be electrically connected to the drive board 150.

[0048] Continue to refer to Figure 1 As shown, in some examples, the outer rotor roller motor 100 further includes a first bearing 160. The first bearing 160 is fixedly connected to the first end of the housing 110, and the fixed shaft 130 is inserted through the first bearing 160, which is beneficial to the relative rotation between the fixed shaft 130 and the housing 110. In some other examples, the roller motor further includes a second bearing 170. The second bearing 170 is fixedly connected to the second end of the housing 110, and the fixed shaft 130 is inserted through the second bearing 170. It can be understood that in these examples, since bearings are provided at both ends of the fixed shaft 130, the relative friction between the housing 110 and the fixed shaft 130 can be reduced, and the rotation efficiency between the two can be improved. In addition, exemplarily, both the first bearing 160 and the second bearing 170 can be deep groove ball bearings, and the specific dimensions can be selected according to the outer diameter of the housing 110.

[0049] Continue to refer to Figure 1As shown, the outer rotor roller motor 100 further includes a bearing seat 180. The bearing seat 180 is fixedly connected to the first end of the housing 110, and the first bearing 160 is fixedly arranged in the bearing seat 180. Additionally, the bearing seat 180 can be designed in the structure of an end cover, and a central hole for the fixed shaft 130 to pass through is provided at its central position. While fixing the first bearing 160, the bearing seat 180 can seal the opening of the housing 110. Exemplarily, the bearing seat 180 can be fixed to the housing 110 by using a locking nut 1120 sleeved on the fixed shaft 130. Additionally, rectangular parallelepiped-shaped protrusions evenly distributed in the circumferential direction and two rectangular slot holes symmetrically distributed on both sides can be provided on the bearing seat 180 for clamping with corresponding grooves on the housing 110, thereby ensuring the connection strength between the bearing seat 180 and the housing 110 and preventing relative sliding between the bearing seat 180 and the housing 110 in the circumferential direction.

[0050] Continue to refer to Figure 1 As shown, the outer rotor roller motor 100 further includes an elastic member 190. The elastic member 190 is sleeved on the fixed shaft 130, and both ends of the elastic member 190 respectively abut against the surfaces of the electromagnetic winding 140 and the second bearing 170. The elastic member 190 can provide pressure for the second bearing 170 to ensure the stable state of the second bearing 170. Additionally, since the electromagnetic winding 140 is fixedly connected to the fixed shaft 130, the elastic member 190 can provide an axial force for the fixed shaft 130, that is, the elastic member 190 provides a stable axial pressure inside the outer rotor roller motor 100 to ensure the stability when the housing 110 rotates relative to the fixed shaft 130. Exemplarily, the elastic member 190 can be a compression spring, and its diameter is larger than the diameter of the fixed shaft 130, so that it can be sleeved on the fixed shaft 130.

[0051] As Figure 1 As shown, exemplarily, the outer rotor roller motor 100 further includes a Hall plate 1100. The Hall plate 1100 is electrically connected to the controller through a cable and can be used to detect the relative rotation speed and angle between the fixed shaft 130 and the housing 110. The Hall plate 1100 is connected to the fixed shaft 130 and arranged inside the housing 110. Additionally, the Hall plate 1100 can be arranged adjacent to the drive plate 150 to make full use of the installation space inside the housing 110.

[0052] In the related art, an electric roller includes a cylinder body 200, a motor stator, and a motor rotor. The cylinder body 200 and the motor rotor are integrally arranged, and the motor stator is arranged through the motor rotor. The motor stator drives the motor rotor and the cylinder body 200 to rotate together. If there is a problem with the electric roller, the operator needs to remove the motor stator from the cylinder body 200 for repair or replacement, and the whole process is complex and troublesome. For example, after the cylinder body 200 of the electric roller is damaged due to collision, the motor stator needs to be removed from the roller, and then the cylinder body 200 and the motor rotor are replaced together. The disassembly and assembly process is troublesome and the repair cost is increased due to the replacement of the stator.

[0053] Figure 2 It is a schematic structural diagram of an electric roller provided by an embodiment of the present application.

[0054] Referring to Figure 2 As shown, in a second aspect, in order to solve the problem that the disassembly, assembly, and maintenance of the electric roller in the prior art are troublesome, an embodiment of the present application further provides an electric roller, including a cylinder body 200 and an outer rotor roller motor 100 as described in any item of the first aspect. The outer rotor roller motor 100 is arranged inside the cylinder body 200. Exemplarily, the outer rotor roller motor 100 is detachably assembled inside the cylinder body 200, so as to facilitate disassembly, assembly, and maintenance. For example, the outer rotor roller motor 100 is clamped in the roller through a mounting member.

[0055] Continuing to refer to Figure 2 As shown, in some examples, the electric roller further includes a shock-absorbing seat 1110. The shock-absorbing seat 1110 is arranged inside the cylinder body 200, and the housing 110 of the outer rotor roller motor 100 is fixedly connected to the cylinder body 200 through a bearing seat 180 and the shock-absorbing seat 1110 to reduce the influence of the vibration generated during the rotation of the outer rotor roller motor 100 on the cylinder body 200. In addition, since the outer rotor roller motor 100 does not directly contact the cylinder body 200, the noise generated by the vibration during the rotation of the outer rotor roller motor 100 is reduced. In addition, when the cylinder body 200 is subjected to an impact load to generate an impact force, the shock-absorbing seat 1110 can effectively absorb this part of the impact force through its own contraction, avoiding the rotational interference of the outer rotor roller motor 100 during the rotation operation and destroying the dynamic balance.

[0056] Continuing to refer to Figure 2 As shown, in some examples, the outer diameter of the housing 110 of the outer rotor roller motor 100 is smaller than the inner diameter of the cylinder body 200. The first end of the housing 110 is connected to the cylinder body 200 through a bearing seat 180, and the second end of the housing 110 is connected to the cylinder body 200 through a shock-absorbing seat 1110, so as to avoid direct contact between the housing 110 and the cylinder body 200 and reduce the vibration transmission between the two.

[0057] Exemplarily, the shock-absorbing seat 1110 is of an annular structure and can be sleeved on the housing 110 of the outer rotor roller motor 100. In addition, a plurality of shock-absorbing claws 1111 are evenly distributed at circumferential intervals of the shock-absorbing seat 1110. The shock-absorbing claws 1111 protrude from the shock-absorbing seat 1110, and the shock-absorbing claws 1111 abut against the inner surface of the cylinder body 200, so as to effectively absorb the vibration generated during the rotation of the outer rotor roller motor 100 and avoid the transmission of this part of the vibration to the cylinder body 200. In order to ensure the vibration absorption ability of the shock-absorbing seat 1110, the shock-absorbing claws 1111, and the bearing seat 180, the shock-absorbing seat 1110, the shock-absorbing claws 1111, and the bearing seat 180 can be configured with plastic materials.

[0058] It is easily understandable that those skilled in the art can combine, split, reorganize, etc. the embodiments of the present application based on several embodiments provided in the present application to obtain other embodiments, and these embodiments do not exceed the protection scope of the present application.

[0059] The above specific implementation manners further elaborate in detail the purpose, technical solutions and beneficial effects of the embodiments of the present application. It should be understood that the above are only the specific implementation manners of the embodiments of the present application, and are not used to limit the protection scope of the embodiments of the present application. Any modifications, equivalent replacements, improvements, etc. made on the basis of the technical solutions of the embodiments of the present application shall be included in the protection scope of the embodiments of the present application.

Claims

1. An outer rotor roller motor, characterized in that, Comprising: A housing (110) having a hollow chamber; A permanent magnet (120) fixedly arranged on the inner surface of the housing (110); A fixed shaft (130) axially penetrating through the housing (110) along the axis of the housing (110); An electromagnetic winding (140) fixedly connected to the fixed shaft (130), and the electromagnetic winding (140) is arranged opposite to the permanent magnet (120) in position; A drive plate (150) connected to the fixed shaft (130), the drive plate (150) is located inside the housing (110), and the drive plate (150) is electrically connected to the electromagnetic winding (140).

2. The outer-rotor roller motor according to claim 1, wherein The fixed shaft (130) has a cavity, and the fixed shaft (130) is provided with a through hole (1310) communicating with the cavity, and a cable passes through the cavity and the through hole (1310) to be electrically connected to the drive plate (150).

3. The outer rotor roller motor according to claim 1, characterized in that, The outer rotor roller motor further includes a first bearing (160), the first bearing (160) is fixedly connected to the first end of the housing (110), and the fixed shaft (130) penetrates through the first bearing (160).

4. The outer rotor roller motor according to claim 1, wherein The outer rotor roller motor further includes a second bearing (170), the second bearing (170) is fixedly connected to the second end of the housing (110), and the fixed shaft (130) penetrates through the second bearing (170).

5. The external rotor roller motor according to claim 3, characterized in that, The outer rotor roller motor further includes a bearing seat (180), the bearing seat (180) is fixedly connected to the first end of the housing (110), and the first bearing (160) is fixedly arranged in the bearing seat (180).

6. The outer rotor roller motor according to claim 4, characterized in that The outer rotor roller motor further includes an elastic member (190), and both ends of the elastic member (190) are directly or indirectly abutted against the fixed shaft and the second bearing respectively.

7. The outer-rotor roller motor according to claim 4, characterized in that, The outer rotor roller motor further includes a Hall plate (1100), the Hall plate (1100) is connected to the fixed shaft (130), and the Hall plate (1100) is located inside the housing (110).

8. The outer-rotor roller motor according to claim 1, characterized in that: The permanent magnet (120) includes a plurality of magnetic pole pieces attached to the inner surface of the housing (110), the magnetic pole pieces include a first magnetic pole piece and a second magnetic pole piece, the first magnetic pole piece and the second magnetic pole piece have opposite polarities, and the two are arranged alternately.

9. An electric roller, characterized in that, Comprising a cylinder body (200) and the outer rotor roller motor (100) according to any one of claims 1-8; The outer rotor roller motor (100) is arranged inside the cylinder body (200).

10. The electric roller according to claim 9, characterized in that, The electric roller further includes a shock-absorbing seat (1110), the shock-absorbing seat (1110) is arranged inside the cylinder body (200), and the housing (110) of the outer rotor roller motor (100) is fixedly connected to the cylinder body (200) through the bearing seat (180) and the shock-absorbing seat (1110); The first end of the housing (110) is connected to the cylinder body (200) through the bearing seat (180), and the second end of the housing (110) is connected to the cylinder body (200) through the shock-absorbing seat (1110).

11. The electric roller according to claim 10, characterized in that, The shock-absorbing claws (1111) are evenly distributed at circumferential intervals of the shock-absorbing seat (1110), the shock-absorbing claws (1111) protrude from the shock-absorbing seat (1110), and the shock-absorbing claws (1111) are abutted against the inner surface of the cylinder body (200).

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