WO2020262387A1

WO2020262387A1 - Motor assembly

Info

Publication number: WO2020262387A1
Application number: PCT/JP2020/024631
Authority: WO
Inventors: 耿彰 ▲ウー▼; 國智顔
Original assignee: 日本電産株式会社
Priority date: 2019-06-28
Filing date: 2020-06-23
Publication date: 2020-12-30
Also published as: CN112152408A; JPWO2020262387A1

Abstract

According to an embodiment, the present application provides a motor assembly that has a motor and a deceleration mechanism that is mounted at one end of the motor in the axial direction, the motor having a rotor part, a stator part, and a cover part, and the deceleration mechanism having an output shaft, an input shaft, and a fixed part. An output-shaft rotating part that rotates together with the output shaft is further included; a first guide member is provided on the rotor part; a second guide member is provided on the output-shaft rotating part; a first sensor and a second sensor for respectively detecting the first guide member and the second guide member are further included; and the first sensor and the second sensor are provided at positions, in the motor assembly, respectively corresponding to the first guide member and the second guide member. According to the present application, the rotation states of the rotor part and the output shaft can be monitored at the same time, thus making it possible to easily realize high-precision control of rotation of the motor assembly.

Description

Motor assembly

The examples of this application relate to the field of mechanical electricity, especially to motor assemblies with reduction gears.

In the prior art, the motor device is provided with a guidance device that detects the rotational status (rotational speed, angular position, etc.) of the rotating shaft of the motor in order to provide information necessary for driving the motor. There is. For example, in Patent Document 1, an encoder, which is an induction device, is provided behind the rear end cover of the motor.

CN102064644A

It should be noted that the introduction to the above technical background is merely provided for the convenience of a clear and complete description of the technical content of the present application and for the convenience of those skilled in the art. is there. It should be noted that the above technical contents cannot be regarded as known to those skilled in the art because these technical contents are described in the background technology of the present application.

The inventors have stated that when a reduction mechanism such as a reduction gear is incorporated into a motor, the prior art does not describe a method of monitoring the rotation of the rotation shaft of the motor and the rotation of the output shaft of the reduction mechanism. discovered.

Therefore, the examples of the present application provide a motor assembly capable of simultaneously monitoring the rotation status of the rotation shaft of the motor and the rotation status of the output shaft of the speed reduction mechanism, and can control the rotation of the motor assembly with high accuracy. To do.

According to the first aspect of the embodiment of the present application, the motor has a motor and a reduction mechanism mounted at one end of the motor in the axial direction, and the motor is provided on a shaft portion and a rotor provided on the outer periphery of the shaft portion. The shaft portion extends along the central axis and rotates about the central axis, and the rotor is located on the outer periphery of the rotor portion that rotates with the shaft portion and the shaft portion. It has a stator portion that faces the rotor in the axial direction and a cover portion that covers the rotor portion and the stator portion. The deceleration mechanism is connected to an output shaft and the rotor portion, and decelerates. A motor assembly having an input shaft that transmits power to the output shaft after being decelerated by the mechanism and a fixing portion that fixes the deceleration mechanism to the motor, and the output shaft rotation that rotates together with the output shaft. The rotor portion is further provided with a first guiding member, the output shaft rotating portion is provided with a second guiding member, and the first guiding member and the second guiding member are provided. Further having a first sensor and a second sensor for detecting the members, respectively, the first sensor and the second sensor are attached to the first guiding member and the second guiding member in the motor assembly. Provided are motor assemblies provided at corresponding positions.

According to the second aspect of the embodiment of the present application, the first guiding member and the second guiding member are located on the same side in the axial direction of the motor.

According to the third aspect of the embodiment of the present application, the shaft portion is a hollow shaft, and the output shaft rotating portion penetrates the hollow shaft.

According to the fourth aspect of the embodiment of the present application, the first guiding member and the second guiding member are located on the same side of the motor in the axial direction.

According to the fifth aspect of the embodiment of the present application, the cover portion covers the output shaft rotating portion, and the first sensor and the second sensor are the same circuit board inside the cover portion. It is provided in.

According to a sixth aspect of an embodiment of the present application, the rotor is located at least at one end in the axial direction of the motor, and is connected to the input shaft of the first rotor and the axial direction of the motor. It includes a second rotor located at the other end and provided with the first guide member.

According to a seventh aspect of the embodiment of the present application, the motor is provided between the shaft portion and the stator portion in the radial direction, and is provided between the first rotor and the second rotor in the axial direction. Further has at least one bearing provided in.

According to the eighth aspect of the embodiment of the present application, the path from the bearing to the first guide member has a labyrinth structure.

According to the ninth aspect of the embodiment of the present application, the path from the bearing to the second guide member has a labyrinth structure.

According to the tenth aspect of the embodiment of the present application, the output shaft rotating portion provided with the second guide member is detachably mounted on the output shaft.

A beneficial effect of the embodiments of the present application is that in the motor assembly, a first guide member provided in a rotor portion having a rotating shaft of the motor and an output shaft rotating portion rotating together with the output shaft of the reduction mechanism are provided. By detecting the second guide member by the first sensor and the second sensor, respectively, the rotation status of the rotor portion and the output shaft can be monitored at the same time, and the rotation of the motor assembly can be controlled with high accuracy. It is easy to achieve.

Specific embodiments of the present application are disclosed in detail with reference to the description and drawings below, and aspects in which the principles of the present application can be adopted are specified. The embodiments of this application should be considered unregulated in scope. Within the spirit and provisions of the appended claims, the embodiments of this application include many modifications, amendments and equivalents.

The included figures are provided for a better understanding of the embodiments of the present application, forming part of the specification, illustrating embodiments of the present application, and along with textual descriptions. The principle of this application will be described. Obviously, the figures below are only a few examples of this application, and other figures may be obtained based on these figures on the premise that those skilled in the art will not pay progressive labor.

It is a figure which shows an example of the motor assembly which concerns on embodiment of this application. It is a figure which shows another example of the motor assembly which concerns on embodiment of this application.

The above and other features of the present application will be clarified by the following specification with reference to the drawings. The specification and drawings specifically disclose the specified embodiments of the present application and show some embodiments in which the principles of the present application can be adopted. It should be understood that the application is not limited to the embodiments described, and that the application includes all amendments, modifications and equivalents within the claims described.

In the examples of the present application, the terms "first", "second", etc. are used to distinguish different elements from the designation, but the spatial arrangement, time series, etc. of these elements are used. These elements are not shown and should not be limited by these terms. The terms "and / or", "and / or" include any one or all combinations of one or more of the relatedly listed terms. The terms "include", "provide", "have", etc. refer to the presence of the described feature, element, element or component, but of one or more other features, elements, elements or components. Existence // Do not exclude additions.

In the examples of the present application, unless otherwise specified in the context, the singular forms "one", "the" and the like are not limited to the meaning of "one", but may include a plural form, in a broad sense. Should be understood as "is" or "one kind", and the term "above" should be understood to include both the singular and the plural. Also, unless otherwise stated in the context, the term "based on" should be understood as "at least partially based on ..." and the term "based on" should be understood as "at least partially. It should be understood that "on the basis of ...".

In the following description of the present application, for the sake of simplicity, the direction parallel to the direction extending along the axis (for example, the central axis OO') is referred to as the "axial direction", and the radial direction about the axis is referred to as "axial direction". It is called "radial direction". Note that none of the above is for convenience of explanation and does not limit the use and manufacturing orientation of the motor assembly.

Hereinafter, embodiments of the embodiments of the present application will be described with reference to the drawings.

The embodiments of this application provide a motor assembly. FIG. 1 is a diagram showing an example of the motor assembly 10 according to the embodiment of the present application, and is a schematic view for cutting the motor assembly 10 along a plane on which the axis OO', which is the central axis of the motor, is located.

In one or more embodiments, as shown in FIG. 1, the motor assembly 10 includes a motor 100 and a reduction mechanism 200 mounted at one end of the motor 100 in the axial direction, wherein the motor 100 has a shaft portion 1011. And the rotor 1012 provided on the outer periphery of the shaft portion 1011. The shaft portion 1011 extends along the central axis OO'and rotates about the central axis OO', and the rotor 1012 rotates together with the shaft portion 1011. It has a rotor portion 101, a stator portion 102 located on the outer periphery of the shaft portion 1011 and facing the rotor 1012 in the axial direction, and a cover portion 103 that covers the rotor portion 101 and the stator portion 102. The speed reduction mechanism 200 is connected to the output shaft 202 and the rotor section 101, and fixes the input shaft 201 that transmits power to the output shaft 202 after being decelerated by the speed reduction mechanism 200 and the speed reduction mechanism 200 to the motor 100. It has a fixed portion 203 and.

In one or more embodiments, the motor assembly 10 further comprises an output shaft rotating portion 300 that rotates with the output shaft 202, the rotor portion 101 having a first guiding member 400, as shown in FIG. A second guide member 500 is provided in the output shaft rotating portion 300, and the motor assembly 10 has a first sensor 401 and a first sensor 401 that detect the first guide member 400 and the second guide member 500, respectively. Further having two sensors 501, the first sensor 401 and the second sensor 501 are provided at positions corresponding to the first guide member 400 and the second guide member 500 in the motor assembly 10, respectively.

As can be seen from the above embodiment, in the motor assembly 10, the first guide member 400 provided in the rotor portion 101 having the shaft portion 1011 of the motor 100 and the output shaft that rotates together with the output shaft 202 of the reduction mechanism 200 By detecting the second guide member 500 provided in the rotating portion 300 by the first sensor 401 and the second sensor 402, respectively, it is possible to simultaneously monitor the rotational status of the rotor portion 101 and the output shaft 202. Therefore, it is possible to easily control the rotation of the motor assembly 10 with high accuracy.

In the embodiment of the present application, the motor 100 may be an axial magnetic flux motor, but is not limited to this, and may be another commonly used motor. The reduction mechanism 200 may be a planetary reduction gear, but is not limited to this, and may be any other type of reduction gear, and may be a one-stage or multi-stage reduction gear. The speed reducer decelerates the input of the input shaft 201 and transmits power to the output shaft 202, and conventional related technology can be referred to.

In one or more embodiments, the first guiding member 400 and the second guiding member 500 are located on the same side of the motor 100 in the axial direction. For example, as shown in FIG. 1, the first guide member 400 and the second guide member 500 may be located on the O'side in the axial direction of the motor 100, but the embodiment of the present application is limited to this. Instead, for example, the first guiding member 400 and the second guiding member 500 may be located on the O side in the axial direction of the motor 100.

As a result, the first sensor 401 and the second sensor 501 can be installed at close positions. For example, in the case shown in FIG. 1, the first sensor 401 and the second sensor 501 are the same. It can be placed on a circuit board, which is advantageous for miniaturization and thinning of the motor assembly, convenient for assembly, and saving of assembly cost and material cost.

In one or more embodiments, as shown in FIG. 1, the shaft portion 1011 is a hollow shaft through which the output shaft rotating portion 300 is penetrated, that is, the output shaft rotating portion 300 is formed in the hollow portion of the shaft portion 1011. It is provided. As a result, the motor assembly can be miniaturized. In this embodiment, the first induction member 400 is provided on the rotor 1012 on the O'side, and the second induction member 500 is provided on the end portion of the output shaft rotating portion 300 near the O'side to provide the first induction. The member 400 and the second guide member 500 can be provided on the same side O'side of the motor 100 in the axial direction.

In one or more embodiments, as shown in FIG. 1, the output shaft rotating portion 300 penetrates the hollow portion of the shaft portion 1011 and can be exposed from the O'side of the shaft portion 1011 so that the cover portion 103 rotates the output shaft. The portion 300 is covered, the first guide member 400 is provided on the rotor 1012 on the O'side, and the second guide member 500 is provided on the portion of the output shaft rotating portion 300 exposed from the O'side of the shaft portion 1011. The first sensor 401 and the second sensor 402 are provided on the same circuit board 600 inside the cover portion 103. This is advantageous for miniaturization and thinning of the motor assembly, convenient for assembly, and saving of assembly cost and material cost.

In one or more embodiments, as shown in FIG. 1, the rotor 1012 is located at the axial O-end of the motor 100 and is connected to the input shaft 201 with a first rotor 10121 in the axial direction of the motor 100. Includes a second rotor 10122, located at the O'end of the, and provided with a first guide member 400. However, FIG. 1 is merely an exemplary description, and examples of the present application are not limited to this. For example, the number of rotors 1012 may be other numerical values, for example, 1, 3 or 3 or more, and the first induction. The installation position of the member 400 is not limited to the rotor located at the O'end of the motor 100, and may be provided at another rotor, for example, the rotor at the O end of the motor 100, or another rotor. When the first guide member 400 is provided on the rotor at another position, the sensor can be provided at the corresponding position. For example, the sensor can be correspondingly provided on the side wall of the motor. Conventional techniques can be referred to for the installation of the guide member at each position of the motor.

In one or more embodiments, as shown in FIG. 1, the motor 100 is provided between the shaft portion 1011 and the stator portion 102 in the radial direction, and the first rotor 10121 and the second rotor 10122 in the axial direction. It has at least one bearing 104 provided between and. As a result, the rotation of the rotor portion can be guided and received. Note that FIG. 1 is merely an exemplary description, and the number of bearings 104 may be other numerical values.

In one or more embodiments, as shown in FIG. 1, the path from the bearing 104 to the first guide member 400 is the labyrinth structure S. The path from the bearing 104 to the second guide member 500 is the labyrinth structure S. As a result, the labyrinth structure can isolate the sensor provided corresponding to the guide member from the bearing, and prevent the guide member and the sensor from being contaminated by grease in the bearing, for example. The labyrinth structure S shown by the bent broken line in FIG. 1 is merely an exemplary description, and when the guiding member is provided at another position, another labyrinth structure can be formed.

In one or more embodiments, the output shaft rotating portion 300 provided with the second guide member 500 is detachably mounted on the output shaft 202. Thereby, when it is not necessary to detect the rotation of the output shaft 202, the mounting of the output shaft rotating portion 300 can be canceled, and the flexibility of the function expansion of the module is increased. For example, FIG. 1 shows that the output shaft rotating unit 300 is detachably fixed to the output shaft 202 by bolting, but the present invention is not limited to this, and other detachable mounting forms may be adopted.

In one or more embodiments, the first sensor and the second sensor may optically, magnetically, and contactually detect the first guiding member and the second guiding member, respectively, via the cord disk. Yes, but the examples of this application do not limit this. Further, the first sensor and the second sensor can detect the first guide member and the second guide member by the same method or different methods, respectively, for example, the second sensor and the second guide member. On the other hand, the first sensor and the first guide member can be realized by a method advantageous for detecting high-speed rotation.

In one or more embodiments, the first guiding member 400 and the second guiding member 500 may be located on different sides of the motor 100 in the axial direction. For example, as shown in FIG. 2, the first guiding member 400 is located on the O'side of the motor 100 in the axial direction, and the second guiding member 500 is located on the O side of the motor 100 in the axial direction, for example. The second guide member 500 is located at the output shaft rotating portion 300 shown in FIG. 2, and the second sensor 501 is provided at a corresponding position of the cover portion of the motor assembly. According to the present application, the rotation status of the rotor unit 101 and the output shaft 202 can be monitored at the same time, and the rotation of the motor assembly 10 can be easily controlled with high accuracy. Further, the reference numerals common to those in FIG. 2 in FIG. 2 correspond to the same members, and the description thereof will be omitted here.

According to the above embodiment, in the motor assembly, a first guiding member provided in the rotor portion having the rotating shaft of the motor and a second guiding member provided in the output shaft rotating portion rotating together with the output shaft of the speed reduction mechanism. By detecting the above with the first sensor and the second sensor, respectively, the rotation status of the rotor and output shaft can be monitored at the same time, and it is easy to control the rotation of the motor assembly with high accuracy. realizable.

It should be noted that the above description has provided only an exemplary explanation of the present application, but the present application is not limited to this, and in addition to the above embodiments, appropriate modifications can be made. Further, in the above, only an exemplary description has been given for each member, but the present application is not limited to this, and the specific contents of each member may refer to related techniques. It is also possible to add members not shown in FIGS. 1 to 2 or reduce one or more members in FIGS. 1 to 2.

Although the present application has been described by combining the above-described embodiments of the invention, it has been found to those skilled in the art that these descriptions are exemplary and not a limitation on the claims of the present application. There should be. Those skilled in the art may make various modifications and amendments to the present application based on the ideas and principles of the present application, and these modifications and amendments are also within the scope of the present application.

The preferred embodiments of the present application have been described above with reference to the accompanying drawings. Many features and advantages of these embodiments are evident from this detailed description. Therefore, the appended claims are intended to cover all of these features and benefits within the true spirit and scope of these embodiments. Moreover, since many amendments and modifications can be easily conceived by those skilled in the art, not limited to the precise structures and operations that illustrate and describe embodiments of the present application, but all suitable within that scope. Corrections and equivalents can be included.

Claims

It has a motor and a deceleration mechanism mounted at one end of the motor in the axial direction.
The motor
It has a shaft portion and a rotor provided on the outer circumference of the shaft portion.
The shaft portion extends along the central axis and rotates about the central axis.
The rotor includes a rotor portion that rotates together with the shaft portion and
A stator portion located on the outer periphery of the shaft portion and facing the rotor in the axial direction, and a stator portion.
It has a cover portion that covers the rotor portion and the stator portion.
The deceleration mechanism
Output axis and
An input shaft that is connected to the rotor and that transmits power to the output shaft after being decelerated by the speed reduction mechanism.
A motor assembly having a fixing portion for fixing the deceleration mechanism to the motor.
Further having an output shaft rotating portion that rotates with the output shaft, the rotor portion is provided with a first guiding member, and the output shaft rotating portion is provided with a second guiding member.
Further having a first sensor and a second sensor for detecting the first guiding member and the second guiding member, respectively, the first sensor and the second sensor are the first sensor in the motor assembly. A motor assembly characterized in that it is provided at a position corresponding to each of the first guiding member and the second guiding member.
The motor assembly according to claim 1, wherein the first guiding member and the second guiding member are located on the same side in the axial direction of the motor.
The motor assembly according to claim 1, wherein the shaft portion is a hollow shaft, and the output shaft rotating portion penetrates the hollow shaft.
The motor assembly according to claim 3, wherein the first guiding member and the second guiding member are located on the same side of the motor in the axial direction.
The claim is characterized in that the cover portion covers the output shaft rotating portion, and the first sensor and the second sensor are provided on the same circuit board inside the cover portion. The motor assembly according to any one of 2 to 4.
The rotor is located at least at one end in the axial direction of the motor, is located at the other end of the motor in the axial direction, and is located at the other end of the motor and the first rotor connected to the input shaft. The motor assembly according to claim 1, wherein the motor assembly includes a second rotor provided with a member.
The motor is further provided with at least one bearing provided between the shaft portion and the stator portion in the radial direction and between the first rotor and the second rotor in the axial direction. The motor assembly according to claim 6.
The motor assembly according to claim 7, wherein the path from the bearing to the first induction member has a labyrinth structure.
The motor assembly according to claim 7, wherein the path from the bearing to the second induction member has a labyrinth structure.
The motor assembly according to claim 1, wherein the output shaft rotating portion provided with the second guide member is detachably mounted on the output shaft.