CN109450146B - Rotary motor - Google Patents
Rotary motor Download PDFInfo
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- CN109450146B CN109450146B CN201811526408.7A CN201811526408A CN109450146B CN 109450146 B CN109450146 B CN 109450146B CN 201811526408 A CN201811526408 A CN 201811526408A CN 109450146 B CN109450146 B CN 109450146B
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/0094—Structural association with other electrical or electronic devices
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Motor Or Generator Frames (AREA)
Abstract
The invention discloses a rotating electrical machine, comprising: a motor housing having a receiving cavity, a hollow motor shaft, a load shaft for insertion into the motor shaft, a stator fixed in the receiving cavity and a rotor rotating relative to the stator, and a load sensing device; wherein the load sensing device comprises an induction coil fixed in the motor housing and surrounding the periphery of the motor shaft, and the load shaft is configured to be inserted into the motor shaft to cooperate with the induction coil so as to change the inductance of the induction coil. The invention has the technical effects that: the motor shaft is designed into a hollow structure, and the space in the motor shaft and the space in the motor shell are utilized to accommodate the load induction device, so that the built-in design of the load induction device is realized, and the structure outside the rotating motor is simplified.
Description
Technical Field
The invention relates to the technical field of motors, in particular to a rotating motor.
Background
An electric machine is also called a motor, and specifically refers to an electromagnetic device that converts or transmits electric energy according to the law of electromagnetic induction. The main operation of the motor is to generate driving torque for use as a power source for various electrical appliances or various mechanical devices. With the continuous development of motor technology, motors have been widely used as important energy conversion devices in various industries and have a trend of rapid development.
When a conventional rotating electrical machine drives an axial load, sensing and measuring the axial load are generally accomplished by using a sensor. At present, it is common to mount the sensor directly on the motor shaft so that the sensor is in an external assembly relationship with respect to the motor. However, the design of the external sensor often causes defects such as complicating the external structure of the motor, and is not beneficial to the assembly of the motor. In addition, in the case of conventional rotating electrical machines, a plurality of axial components are typically connected together in series using fasteners. However, such an assembly method causes a large number of fasteners in the rotating electrical machine, and is cumbersome to assemble. In particular, bearings are often used in assembling the motor shaft, which results in the radial dimensions of the motor shaft being limited by the bearing structure, and thus the radial dimensions of the motor shaft are generally relatively small.
It follows that there is a need to develop new rotating electrical machine structures that address at least one of the problems of the prior art.
Disclosure of Invention
An object of the present invention is to provide a new technical solution for a rotating electrical machine.
According to an aspect of the present invention, there is provided a rotary electric machine including:
a motor housing having a receiving cavity;
a hollow motor shaft;
a load shaft for insertion into the motor shaft;
a stator fixed in the accommodating chamber and a rotor rotating relative to the stator;
a load sensing device including an induction coil secured in a motor housing and surrounding a motor shaft, the load shaft configured to be inserted into the motor shaft to cooperate with the induction coil to vary an inductance of the induction coil.
Optionally, the load shaft is made of a ferrous material; the load shaft is configured to be inserted into or over the induction coil.
Optionally, the load shaft is made of a non-ferrous material; the motor also comprises an induction coil which is elastically supported in the motor shaft; when the induction coil is at the initial position, the induction coil is staggered with the induction coil; when the load shaft is inserted into the motor shaft, the load shaft drives the induction coil down to mate with the induction coil to change the inductance of the induction coil.
Optionally, the outer side of the induction coil extends radially outwards to form a ring-shaped bearing table;
a circle of annular grooves for being matched with the annular bearing table are formed in the inner wall of the motor shaft; the annular bearing table is borne in the annular groove through a spring.
Optionally, the induction coil has a tapered inner cavity, and the free end of the load shaft is adapted to the inner cavity of the induction coil.
Optionally, the rotating motor further comprises a bottom cover, wherein the bottom cover is fixed at the bottom of the motor shell, a middle hole penetrated by a motor shaft is formed in the bottom cover, and a circle of groove is formed in the bottom cover around the middle hole; the induction coil is disposed in the recess.
Optionally, a shielding ring for electromagnetic isolation from the stator is arranged on the exposed end face of the induction coil.
Optionally, the motor shaft has opposite first and second ends; a circle of ring grooves which are recessed inwards are formed in the position, adjacent to the first end, of the motor shaft; a first cylinder and a second cylinder are sequentially formed at the position from the annular groove to the second end of the motor shaft, the size of the first cylinder is larger than that of the second cylinder, and a first step groove is formed at the connecting position of the first cylinder and the second cylinder;
the ring groove is internally provided with a split sliding upper bearing in a clearance fit mode, and the split sliding upper bearing is configured to: when the motor shaft is inserted into the accommodating cavity, the split sliding upper bearing is fixed on the motor shell and used for positioning the first end of the motor shaft;
the rotor is fixed on a first column of the motor shaft;
the second cylinder of the motor shaft stretches into the middle hole on the bottom cover and is in clearance fit with the middle hole, and the first step groove of the motor shaft is borne on the end face of the bottom cover so as to position the second end of the motor shaft.
Optionally, the split sliding upper bearing comprises a semicircular first sliding upper bearing and a semicircular second sliding upper bearing, and the first sliding upper bearing and the second sliding upper bearing are respectively arranged in a ring groove of the motor shaft;
the position of the accommodating cavity relative to the first end of the motor shaft is provided with a second step groove which is used for being fixed with the split sliding upper bearing.
Optionally, the bottom cover is in a cover plate shape, a raised annular table is further arranged on the inner side end surface of the bottom cover around the middle hole, and the first step groove of the motor shaft is borne on the annular table;
a plurality of supporting portions extending outwards in the radial direction are distributed on the outer wall of the annular table along the circumferential direction, a concave portion is formed between two adjacent supporting portions, and the plurality of concave portions are configured to: the coil is used for avoiding winding on the stator;
a blocking groove for positioning one side of the stator is arranged on the inner wall of the accommodating cavity, and the supporting part of the bottom cover is configured to: for positioning the other side of the stator.
According to the rotating motor provided by the embodiment of the invention, the motor shaft is designed to be of a hollow structure, and the space in the motor shaft and the space in the motor shell are utilized to accommodate the load induction device, so that the built-in design of the load induction device is realized, and the structure outside the rotating motor is simplified.
Other features of the present invention and its advantages will become apparent from the following detailed description of exemplary embodiments of the invention, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.
Fig. 1 is a cross-sectional view of a rotary electric machine provided in an embodiment of the present invention.
Fig. 2 is a structural exploded view of a rotary electric machine provided in an embodiment of the present invention.
Fig. 3 is a schematic structural diagram of a load sensing apparatus according to an embodiment of the present invention.
Reference numerals illustrate:
the motor comprises a 1-load tray, a 101-load shaft, a 2-split sliding upper bearing, a 3-motor shaft, 301-ring grooves, 302-first columns, 303-second columns, 304-ring grooves, 305-first step grooves, 4-springs, 5-induction coils, 501-ring-shaped bearing platforms, 6-rotors, 7-stators, 701-stator windings, 8-induction coils, 9-shielding rings, 10-bottom covers, 1001-middle holes, 1002-grooves, 1003-ring platforms, 1004-supporting parts, 1005-concave parts, 11-motor shells, 1101-second step grooves and 1102-blocking grooves.
Detailed Description
Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless it is specifically stated otherwise.
The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the invention, its application, or uses.
Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of exemplary embodiments may have different values.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.
An embodiment of the present invention provides a rotating electrical machine, as shown with reference to fig. 1 and 2, including: a motor housing 11 having a receiving chamber, a hollow motor shaft 3, a load shaft 101 for insertion into the motor shaft 3, a stator 7 fixed in the receiving chamber and a rotor 6 rotating relative to the stator 7, and a load sensing means. Wherein the load sensing means comprises an induction coil 8 fixed in a motor housing 11 and surrounding the periphery of the motor shaft 3, and the load shaft 101 is configured to: can be inserted into the hollow motor shaft 3 to cooperate with the induction coil 8 to change the inductance of the induction coil 8.
The rotating motor provided by the embodiment of the invention has the advantages that the motor shaft 3 is designed to be of a hollow structure, and the load shaft 101 can be inserted into the motor shaft 3. The load sensing device is provided in the motor housing 11. Therefore, the load sensing device can form a built-in design relative to the motor, and the external structure of the rotating motor is simplified. When the motor drives the axial load, the sensing and measuring of the axial load can be realized by the built-in load sensing device.
In addition, the aspect ratio of the motor shaft 3 provided by the embodiment of the invention is smaller than 1. The purpose of this design is to create a motor shaft of a slim profile that allows the motor shaft 3 to have a larger dimension in the radial direction. In addition, the motor shaft 3 has a hollow structure, so that the load shaft 101 or other components can be conveniently inserted into the motor shaft, and the space in the motor shaft 3 can be effectively utilized.
The load shaft 101 of the present invention may be made of a ferrous material. When the load shaft 101 is of ferrous material, it is either directly inserted into the induction coil 8 or passed over the induction coil 8 in use. At this time, since the load shaft 101 is made of a ferrous material, when inserted into the induction coil 8, a change in inductance of the induction coil 8 may be caused. Specifically: when the load shaft 101 of iron is inserted into the induction coil 8 or overruns the induction coil 8, an increase in the inductance of the induction coil 8 may be caused.
The load shaft 101 of the present invention may also be made of a non-ferrous material. When the load shaft 101 is made of nonferrous materials, referring to fig. 1 and 2, the load sensing device according to the embodiment of the present invention may further include an induction coil 5 elastically supported in the motor shaft 3, and the induction coil 5 is made of a magnet material. Specifically, in the initial position, the induction coil 5 is offset from the induction coil 8. When the load shaft 101 is inserted into the motor shaft 3, referring to fig. 3, the load shaft 101 may drive the induction coil 5 downward to be fitted with the induction coil 8 to change the inductance of the induction coil 8. At this time, the insertion of the coil 5 of the magnet material into the induction coil 8 may cause a change in the inductance of the induction coil 8, that is, an increase in the inductance of the induction coil 8.
The present invention is described herein with respect to the load shaft 101 being made of a nonferrous material, and the load sensing device of the present invention is described with respect to the inductor 5, which is required to be provided with a magnet material.
For a load shaft 101 of non-ferrous material, when inserted into the motor shaft 3, the inductor coil 5 may be moved down into engagement with the inductor coil 8. And at this time, an increase in inductance of the induction coil 8 is caused. Specifically:
the load sensing device adopts a current measurement mode, and is concretely as follows:
inductance of the inductor 5LThe method comprises the following steps:
；
wherein: the coefficient of the k-coil is set,-a magnetic permeability inside the coil,Nthe number of turns of the coil,Scoil cross-sectional area, l-coil length.
The above can be simplified for the hollow coil 5 toThe method comprises the steps of carrying out a first treatment on the surface of the Wherein k-coil coefficients.
When the load shaft 101 drives the inductor 5 to move downward into the inductor 8, the inductance of the inductor 8L 1 The method comprises the following steps:
；
wherein:-coil internal magnetic core relative permeability.
The current flowing through the induction coil 8 at no load is:
；
after loading, the inductance of the induction coil 8 is increased by inserting the induction coil 5 (magnet material)L 1 Rapidly increase the current I 1 and/I < 1, and the load loading condition can be judged through the output of the logic comparison circuit.
In addition, referring to fig. 1, the rotating electrical machine according to the embodiment of the present invention has one end of a load shaft 101 extending radially outward to form a load tray 1. In one embodiment of the present invention, referring to fig. 2, the load tray 1 has the structure as follows: the load tray 1 is provided with a load loading hole to which a hollow load shaft 101 is connected.
The structure of the induction coil 5 of the present invention is: referring to fig. 1 and 2, a ring of annular carriers 501 is formed extending radially outwardly from the outer side thereof. Specifically, a ring of annular grooves 304 for mating with the annular bearing table 501 is provided on the inner wall of the motor shaft 3, and the annular bearing table 501 can be borne in the annular grooves 304 by the springs 4. Thereby avoiding the slipping phenomenon of the induction coil 5.
The inner wall of the induction coil 5 can be designed to be of a tapered structure. This design is mainly for carrying the load shaft 101 etc. In one embodiment of the invention, referring to fig. 1, the coil 5 has a tapered interior, and the free end of the load shaft 101 fits into the interior of the coil 5. Further, a circle of bearing ring table can be arranged on the inner wall of the induction coil 5, so that a better bearing effect is achieved.
The induction coil 5 may be made of a material well known in the art, for example, a magnet material, which is not limited in the present invention.
Wherein the annular bearing platform 501 of the induction coil 5 can be carried in the annular groove 304 in the motor shaft 3 by means of the spring 4. And the spring 4 is configured to: when the load shaft 101 is removed, the coil 5 can return to its original position under the action of the spring 4, i.e. the coil 5 is offset from the coil 8.
In one embodiment of the present invention, the spring 4 may be a wave spring. The wave spring has a ring structure, and as shown in fig. 2 and 3, a plurality of wave crests and wave troughs are formed on the wave spring, and the wave crests and the wave troughs are staggered with each other.
Alternatively, one or a plurality of springs 4 may be provided. When the plurality of springs 4 are sleeved outside the induction coil 5, the plurality of springs 4 can be stacked in order on the outer wall of the induction coil 5. Of course, the number of the springs 4 can be reasonably set according to the spring force requirement and the load weight, and the invention is not limited to this.
The spring 4 may be made of materials well known in the art, for example, a spring steel material. The spring steel material has excellent mechanical properties, in particular good elastic limit, strength limit and the like. And the spring steel material also has good relaxation resistance, heat resistance, low temperature resistance, oxidation resistance, corrosion resistance and the like, and is very suitable for being applied to a motor.
Of course, other elastic members well known in the art may be used in order to smoothly return the coil 5 to the initial position, which is not limited by the present invention.
Referring to fig. 1 and 2, the rotary electric machine according to the embodiment of the present invention further includes a bottom cover 10. Specifically, a bottom cover 10 is fixed to the bottom of the motor housing 11, a center hole 1001 through which the motor shaft 3 passes is provided on the bottom cover 10, and a ring of grooves 1002 is provided on the bottom cover 10 around the center hole 1001. The recess 1002 may be used to house the induction coil 8 of a load sensing device such that the induction coil 8 is located within the motor housing 11.
Optionally, a shielding ring 9 for electromagnetic insulation from the stator 7 is provided on the exposed end face of the induction coil 8. Wherein the shielding ring 9 is made of ferromagnetic material with shielding effect.
In particular, the shielding ring 9 is integrated with the induction coil 8. In one embodiment of the invention, the shield ring 9 and the induction coil 8 may be glued together. Of course, the shield ring 9 and the induction coil 8 may also be fastened together in other ways known in the art.
The rotating motor provided by the embodiment of the invention can be inserted when the motor shaft 3 is assembled. Specifically, the motor shaft 3 has opposite first and second ends; a ring groove 301 recessed inwards is formed in the motor shaft 3 at a position adjacent to the first end; the motor shaft 3 is formed with a first cylinder 302 and a second cylinder 303 in order from the ring groove 301 to the second end, the size of the first cylinder 302 is larger than that of the second cylinder 303, and a first step groove 305 is formed at the connecting position of the first cylinder 302 and the second cylinder 303. A split sliding upper bearing 2 is clearance-fitted in the ring groove 301, and the split sliding upper bearing 2 is configured to: when the motor shaft 3 is inserted into the accommodating cavity, the split sliding upper bearing 2 is fixed on the motor housing 11 for positioning the first end of the motor shaft 3. The second cylinder 303 of the motor shaft 3 extends into the middle hole 1001 of the bottom cover 10 and is in clearance fit with the middle hole 1001, and the first stepped groove 305 of the motor shaft 3 is carried on the end surface of the bottom cover 10 to position the second end of the motor shaft 3. Such a design makes it possible to dispense with the use of fasteners when assembling the motor shaft 3. Therefore, the assembly mode of the motor shaft is simpler, and the assembly efficiency can be remarkably improved during assembly.
The split sliding upper bearing 2, referring to fig. 1 and 2, has the following structure: comprises a semicircular first sliding upper bearing and a semicircular second sliding upper bearing. Wherein, the first upper sliding bearing and the second upper sliding bearing are respectively arranged in the ring groove 301 of the motor shaft 3. When the split sliding upper bearing 2 is used, the two semicircular first sliding upper bearings and the second sliding upper bearings can be butted together to form a sliding bearing structure surrounding the motor shaft 3, so that the first end of the motor shaft 3 can be positioned, the bearing holes of the sliding bearing structure can be made larger, and the radial size of the motor shaft can be free from the limitation of the bearing structure. Of course, it will be apparent to those skilled in the art that other types of split structures, such as two arc or three arc combined plain bearing structures, may be used and will not be described in detail herein.
In particular, the split sliding upper bearing 2 may be made of teflon material. The Teflon material has the characteristics of high temperature resistance, low friction coefficient, good wear resistance and good chemical stability. Of course, other materials known in the art may be used for the split sliding upper bearing, and the present invention is not limited thereto.
Further, the split sliding upper bearing 2 is adapted to be provided with a plurality of recesses on the inner wall adapted to the ring groove 301 at intervals. The design of a plurality of depressions can reduce the friction area with the motor shaft 3, thereby reducing the friction with the motor shaft 3 and finally prolonging the service life of the motor shaft.
When the motor shaft 3 is fitted into the accommodation chamber of the motor housing 11, as shown with reference to fig. 1 and 2, a second stepped groove 1101 for fixing with the split sliding upper bearing 2 is provided at a position of the accommodation chamber with respect to the first end of the motor shaft 3. The second stepped groove 1101 is adapted to carry the split sliding upper bearing 2, and the split sliding upper bearing 2 is fixed to the motor housing 11 for positioning the first end of the motor shaft 3.
The split sliding upper bearing 2 is shaped, sized to fit into the second stepped groove 1101 and may be secured in the second stepped groove 1101 by glue or other means known to those skilled in the art. Of course, it is also possible for a person skilled in the art to fix the split sliding upper bearing 2 directly to the end face of the motor housing 11, which is not described in detail here.
In another embodiment of the present invention, the split sliding upper bearing 2 and the second step groove 1101 may be assembled together in an interference fit manner, and the fixation of the split sliding upper bearing 2 may also be achieved.
The above-described manner employed in the present invention eliminates the need for fasteners such as screws, rivets, bolts, etc. in assembling the split sliding upper bearing 2, but still ensures the stability of the assembly, and the assembly is simple. Of course, other fixing connection means well known in the art may be used in assembling the split sliding upper bearing 2, which is not limited by the present invention.
Referring to fig. 2, the bottom cover 10 of the present invention is shaped like a cover plate, a raised ring land 1003 is provided around the center hole 1001 on the inner end surface thereof, and a groove 1002 is provided on the outer circumference of the ring land 1003, and the first stepped groove 305 of the motor shaft 3 is carried on the ring land 1003. A plurality of radially outwardly extending support portions 1004 are circumferentially distributed on the outer wall of the annular table 1003, and a recessed portion 1005 is formed between two adjacent support portions 1004.
The bottom cover 10 may be made of teflon material. The Teflon material has the characteristics of high temperature resistance, low friction coefficient, good wear resistance and good chemical stability. Of course, the bottom cover 10 may be made of materials well known in the art, may be made of metal materials, or may be made of non-metal materials, which is not limited in the present invention.
The motor shaft 3 is provided with a first end and a second end which are oppositely arranged, and the motor shaft 3 is respectively matched with the bottom cover 10 by adopting a special structure of the split sliding upper bearing 2 and the accommodating cavity, so that the bidirectional positioning effect of the motor shaft 3 without a fastener is realized.
The rotary electric machine provided by the embodiment of the invention is based on the structure of the motor housing 11, and when the stator 7 and the rotor 6 are assembled, the stator 7 and the rotor 6 are configured to be assembled into the accommodation chamber from the position of the motor housing 11 relative to the second end of the motor shaft 3. Specifically, referring to fig. 2, a blocking groove 1102 for positioning one side of the stator 7 is provided on the inner wall of the accommodating chamber; the supporting portion 1004 of the bottom cover 10 is configured to: for positioning the other side of the stator 7. By this design, the stator 7 can be fixed in the receiving space of the motor housing 11.
Alternatively, the outer wall of the stator 7 and the wall surface of the accommodating cavity may be fixed together by adhesive, or the stator 7 and the accommodating cavity may be assembled together in an interference fit manner. To achieve a stable fixation of the stator 7. The two modes do not adopt fixing pieces, and the assembly is convenient and simpler. The stator 7 can be effectively prevented from falling off during the operation of the motor. Of course, other fixing connection methods well known in the art may be used in the fixing of the stator in the accommodating cavity, which is not limited by the present invention.
Wherein the stator 7 and the rotor 6 may each have a ring-like structure to facilitate assembly therebetween. In one embodiment of the present invention, when assembled, the rotor 6 may be positioned in the central hole of the stator 7, and the rotor 6 and the stator 7 may be clearance fit together, so that the rotor 6 can rotate relative to the stator 7; the first column 302 of the motor shaft 3 is fixedly connected with the rotor 6, and when the rotor 6 rotates relative to the stator 7, the motor shaft 3 can be driven to rotate.
In a specific embodiment of the present invention, the stator 7 may be configured to include a stator core, on an inner side wall of which a plurality of stator teeth protruding toward the rotor 6 are circumferentially distributed, a stator winding 701 is wound around each stator tooth, and an end portion of each stator tooth is provided with a tooth shoe, on a side facing the rotor 6 of which a plurality of grooves are uniformly distributed, as shown in fig. 2. Further, the stator teeth of the stator 7 are wound with the stator windings 701. The plurality of concave portions 1005 formed on the bottom cover 10 may be used to avoid the stator winding 701, so as to implement the placement of the stator winding 701.
In one embodiment of the present invention, the rotor 6 may have a structure including a rotor core, on an outer side wall of which a plurality of rotor teeth extend in a circumferential direction, and rotor tooth grooves are formed between two adjacent rotor teeth, as shown with reference to fig. 2.
As can be seen from the above structures of the stator 7 and the rotor 6, the stator 7 and the rotor 6 adopted in the rotating electrical machine provided by the embodiment of the invention are provided with tooth slot structures, so that a stepping motor can be formed.
Of course, other configurations of stators and rotors known in the art may be employed in the electric machine, as the invention is not limited in this regard.
Wherein, referring to fig. 2, the stator 7 may be formed by laminating a plurality of punched sheets. The rotor 6 may also be formed by lamination of a plurality of punched sheets.
When the punching sheets are laminated, a plurality of the punching sheets can be fixed by adopting a fixing piece. The fixing member may be, for example, a rivet, a screw, or the like, which are well known in the art. The punching sheets can be welded together. Of course, the multiple punched sheets may be combined together in other manners, which is not limited by the present invention.
The punched sheet of the present invention may be, for example, a cold rolled silicon steel sheet or a hot rolled silicon steel sheet having a thickness of 0.25mm to 0.5 mm. By the design, eddy current loss and hysteresis loss can be effectively reduced, and the heating condition of the stator core or the rotor core is reduced. In fact, when the thickness of the silicon steel sheet is thinner, eddy current loss can be remarkably reduced, and the heating phenomenon of the stator core or the rotor core is reduced. However, the silicon steel sheets are not easy to be too thin, otherwise, the silicon steel sheets are not easy to process, the strength is low, the lamination of a plurality of silicon steel sheets is not easy, and even the service life of a stator or a rotor is short.
In the stator 7, when the stator winding 701 is wound around the stator teeth, the stator teeth may be subjected to an insulation treatment in advance so that the stator winding 701 wound around the stator teeth does not contact the conductive member. For example, an insulating varnish may be applied to the outer wall of the stator teeth when insulating the stator teeth. Of course, other insulation treatments known in the art may be used to provide good insulation to the stator teeth.
Alternatively, a lead portion for leading out the lead wire of the coil on the stator to the outside may be provided on the motor housing 11 so as to lead out the lead wire of the coil.
Alternatively, the motor housing 11 may be made of a lightweight metal material, for example: aluminum or aluminum alloy, etc., to reduce the weight of the overall motor. Of course, the motor housing 11 may also be made of nonmetallic materials well known in the art, which the present invention is not limited to.
The rotating motor provided by the embodiment of the invention has the advantages of simple structure and convenience in assembly, and a fastener can be omitted in the assembly process. The rotating motor provided by the embodiment of the invention can be applied to various fields of electric automobiles or robots and the like, and the invention is not limited to the fields.
While certain specific embodiments of the invention have been described in detail by way of example, it will be appreciated by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.
Claims (8)
1. A rotating electrical machine, characterized by comprising:
a motor housing having a receiving cavity;
a hollow motor shaft;
a load shaft for insertion into the motor shaft;
a stator fixed in the accommodating chamber and a rotor rotating relative to the stator;
a load sensing device including an induction coil fixed in the motor housing and surrounding the periphery of the motor shaft, the load shaft configured to be inserted into the motor shaft to cooperate with the induction coil to change the inductance of the induction coil;
a shielding ring for electromagnetic isolation with the stator is arranged on the exposed end surface of the induction coil;
the motor shaft is provided with a first end and a second end which are opposite; a circle of ring grooves which are recessed inwards are formed in the position, adjacent to the first end, of the motor shaft; a first cylinder and a second cylinder are sequentially formed at the position from the annular groove to the second end of the motor shaft, the size of the first cylinder is larger than that of the second cylinder, and a first step groove is formed at the connecting position of the first cylinder and the second cylinder;
the ring groove is internally provided with a split sliding upper bearing in a clearance fit mode, and the split sliding upper bearing is configured to: when the motor shaft is inserted into the accommodating cavity, the split sliding upper bearing is fixed on the motor shell and used for positioning the first end of the motor shaft;
the rotor is fixed on a first column of the motor shaft;
the second cylinder of the motor shaft stretches into the middle hole on the bottom cover and is in clearance fit with the middle hole, and the first step groove of the motor shaft is borne on the end face of the bottom cover so as to position the second end of the motor shaft.
2. The rotating electric machine according to claim 1, characterized in that the load shaft is made of a ferrous material; the load shaft is configured to be inserted into or over the induction coil.
3. The rotating electric machine according to claim 1, characterized in that the load shaft is made of a non-ferrous material;
the motor also comprises an induction coil which is elastically supported in the motor shaft; when the induction coil is at the initial position, the induction coil is staggered with the induction coil; when the load shaft is inserted into the motor shaft, the load shaft drives the induction coil down to mate with the induction coil to change the inductance of the induction coil.
4. A rotating electric machine according to claim 3, wherein the outer side of the induction coil extends radially outwardly to form a ring-shaped carrier;
a circle of annular grooves for being matched with the annular bearing table are formed in the inner wall of the motor shaft; the annular bearing table is borne in the annular groove through a spring.
5. A rotating electric machine according to claim 3, characterized in that the induction coil has a conical inner cavity, the free end of the load shaft being adapted to the inner cavity of the induction coil.
6. The rotating electric machine according to claim 1, characterized by further comprising a bottom cover fixed to a bottom of the motor housing, the bottom cover being provided with a center hole through which a motor shaft penetrates, the bottom cover being provided with a ring of grooves around the center hole; the induction coil is disposed in the recess.
7. The rotating electrical machine according to claim 1, wherein the split type upper sliding bearing includes a first upper sliding bearing having a semicircular shape, a second upper sliding bearing having a semicircular shape, the first upper sliding bearing and the second upper sliding bearing being respectively placed in a ring groove of a motor shaft;
the position of the accommodating cavity relative to the first end of the motor shaft is provided with a second step groove which is used for being fixed with the split sliding upper bearing.
8. The rotary electric machine according to claim 1, wherein the bottom cover is in a cover plate shape, a raised ring table is further provided around the center hole on an inner side end surface thereof, and the first step groove of the motor shaft is carried on the ring table;
a plurality of supporting portions extending outwards in the radial direction are distributed on the outer wall of the annular table along the circumferential direction, a concave portion is formed between two adjacent supporting portions, and the plurality of concave portions are configured to: the coil is used for avoiding winding on the stator;
a blocking groove for positioning one side of the stator is arranged on the inner wall of the accommodating cavity, and the supporting part of the bottom cover is configured to: for positioning the other side of the stator.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811526408.7A CN109450146B (en) | 2018-12-13 | 2018-12-13 | Rotary motor |
| PCT/CN2018/123434 WO2020118769A1 (en) | 2018-12-13 | 2018-12-25 | Rotary electric motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811526408.7A CN109450146B (en) | 2018-12-13 | 2018-12-13 | Rotary motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109450146A CN109450146A (en) | 2019-03-08 |
| CN109450146B true CN109450146B (en) | 2023-10-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811526408.7A Active CN109450146B (en) | 2018-12-13 | 2018-12-13 | Rotary motor |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN109450146B (en) |
| WO (1) | WO2020118769A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109510379B (en) * | 2018-11-26 | 2023-11-17 | 歌尔股份有限公司 | Motor |
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| US5798591A (en) * | 1993-07-19 | 1998-08-25 | T-Flux Pty Limited | Electromagnetic machine with permanent magnet rotor |
| CN204413221U (en) * | 2015-01-24 | 2015-06-24 | 宿州学院 | A kind of motor shaft operator guards |
| CN204442089U (en) * | 2014-10-23 | 2015-07-01 | 丹东山川电机有限公司 | General motor for speed reducer |
| CN105720765A (en) * | 2014-12-22 | 2016-06-29 | 铃木株式会社 | Axial gap type electrical rotation machine |
| CN105990968A (en) * | 2015-03-20 | 2016-10-05 | 铃木株式会社 | Axial gap type rotation motor |
| CN106602749A (en) * | 2016-12-30 | 2017-04-26 | 常州朗奇威电器有限公司 | Outer rotor DC motor |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002317820A (en) * | 2000-03-29 | 2002-10-31 | Nsk Ltd | Fluid bearing device |
| CN103460571B (en) * | 2011-03-31 | 2016-11-16 | 并木精密宝石株式会社 | Outer rotor motor |
| CN202384919U (en) * | 2011-12-29 | 2012-08-15 | 无锡尚格工业设计有限公司 | Integrated-containing torque sensor motor |
| JP6401034B2 (en) * | 2014-12-02 | 2018-10-03 | 株式会社ミツバ | Hollow motor |
| CN206117402U (en) * | 2016-06-29 | 2017-04-19 | 九江精密测试技术研究所 | Jumbo size low inertia is cavity shafting of rotation in succession |
| CN206481172U (en) * | 2017-01-21 | 2017-09-08 | 苏州智驱机电科技有限公司 | A kind of motor provided with hollow shaft core |
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2018
- 2018-12-13 CN CN201811526408.7A patent/CN109450146B/en active Active
- 2018-12-25 WO PCT/CN2018/123434 patent/WO2020118769A1/en active Application Filing
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5798591A (en) * | 1993-07-19 | 1998-08-25 | T-Flux Pty Limited | Electromagnetic machine with permanent magnet rotor |
| CN204442089U (en) * | 2014-10-23 | 2015-07-01 | 丹东山川电机有限公司 | General motor for speed reducer |
| CN105720765A (en) * | 2014-12-22 | 2016-06-29 | 铃木株式会社 | Axial gap type electrical rotation machine |
| CN204413221U (en) * | 2015-01-24 | 2015-06-24 | 宿州学院 | A kind of motor shaft operator guards |
| CN105990968A (en) * | 2015-03-20 | 2016-10-05 | 铃木株式会社 | Axial gap type rotation motor |
| CN106602749A (en) * | 2016-12-30 | 2017-04-26 | 常州朗奇威电器有限公司 | Outer rotor DC motor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109450146A (en) | 2019-03-08 |
| WO2020118769A1 (en) | 2020-06-18 |
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