CN216356157U - Rotating assembly and motor with same - Google Patents

Abstract

The application provides a rotating assembly and a motor with the same, and the rotating assembly comprises a damping rotor and a rotating shaft, wherein the damping rotor comprises a damping structure; the pivot and shock-absorbing structure contact each other, and the pivot can drive shock-absorbing structure and rotate. According to the rotating assembly and the motor with the rotating assembly, the shock absorption structure can be prevented from being broken in the rotating process.

Description

Rotating assembly and motor with same

Technical Field

The application belongs to the technical field of motors, and particularly relates to a rotating assembly and a motor with the rotating assembly.

Background

At present, in order to reduce the vibration when the motor is loaded, a damping rotor is generally adopted. The damping rotor structure in the prior art generally divides the iron core into an inner iron core and an outer iron core, and the damping rubber is filled between the inner iron core and the outer iron core, and the inner iron core is provided with a convex part matched with the damping rubber. When the motor was carried the operation, torsion transmitted the cushion gum through interior iron core, and convex part department stress is the biggest, can lead to cushion gum and interior iron core convex part cooperation department to receive extrusion deformation volume too big, under long-time big moment of torsion operation, the cushion gum can appear the phenomenon of breaking even, leads to inside and outside iron core cooperation unreliable, produces relative displacement, has increased the vibration and the noise of motor on the contrary. And when the traditional damping rotor is subjected to axial force, the degumming phenomenon easily occurs.

Therefore, how to provide a rotating assembly capable of preventing a shock absorbing structure from being broken during rotation and a motor having the same has become an urgent problem to be solved by those skilled in the art.

SUMMERY OF THE UTILITY MODEL

Therefore, the technical problem that this application will be solved lies in providing a rotating assembly and have its motor, can prevent to shake structural fracture in the rotation process.

In order to solve the above problems, the present application provides a rotating assembly including:

the damping rotor comprises a damping structure;

and the rotating shaft is in mutual contact with the damping structure, and the rotating shaft can drive the damping structure to rotate.

Furthermore, the damping rotor is provided with a shaft hole, and the rotating shaft is arranged in the shaft hole; shock-absorbing structure includes the contact zone, and the contact zone is located the axle hole, and it is spacing that pivot and contact zone form circumference for the pivot can drive the contact zone and rotate.

Furthermore, the shaft hole comprises an iron core section and a damping section which are sequentially arranged in the axial direction of the rotating shaft; the damping rotor also comprises an inner iron core, wherein an iron core hole is formed in the inner iron core, the iron core hole forms an iron core section, and the rotating shaft and the inner iron core form circumferential limit in the iron core section; the contact zone has the annular face that extends around the pivot circumference, and the annular face forms the shock attenuation section, and pivot and contact zone form circumference spacing at the shock attenuation section.

Further, interior iron core includes iron core in first and the second, and iron core sets gradually in the axial of pivot with the second in first, and the contact zone is located between iron core in first and the second.

Furthermore, an annular boss extending around the circumferential direction of the rotating shaft is arranged on the rotating shaft, the inner iron core is arranged on one axial side of the annular boss, and the annular boss and the contact area form circumferential limit.

Furthermore, the damping rotor also comprises an outer iron core, and the damping structure also comprises a damping area; the damping district sets up between outer iron core and interior iron core, is provided with first arch on the periphery wall of interior iron core, be provided with the first recess with first protruding looks adaptation on the internal perisporium in damping district.

Further, the outer iron core comprises a plurality of iron core parts which are circumferentially arranged around the rotating shaft, and a magnetic steel slot is formed between every two adjacent iron core parts; the iron core part comprises a first iron core part and a second iron core part which are arranged in a staggered mode, a radial limiting piece is arranged on the inner peripheral side of the first iron core part, and the radial limiting piece extends to the two sides of the circumference of the first iron core part.

Furthermore, the first protrusion and the radial limiting piece are arranged in a staggered mode in the circumferential direction of the rotating shaft.

Furthermore, the damping structure also comprises two connecting parts and a damping column, the two connecting parts are respectively connected with the two axial ends of the damping area, the damping column extends from one axial end of the damping area to the other axial end of the damping area, and the damping column is connected with both the two connecting parts; the outer iron core is provided with an axially extending filling hole, and the shock absorption column is arranged in the filling hole.

According to still another aspect of the present application, there is provided a motor including a rotating assembly as described above.

The application provides a rotating assembly and have its motor, this application rotates the in-process at the pivot, and the pivot can directly drive shock-absorbing structure and rotate to it is too big to have prevented shock-absorbing structure and interior iron core cooperation department from receiving the extrusion deflection, under long-time big moment of torsion operation, cracked problem appears in shock-absorbing structure, can also prevent shock-absorbing structure phenomenon of coming unstuck. This application can prevent to rotate in-process shock-absorbing structure and break.

Drawings

FIG. 1 is a schematic view of a mounting structure of a rotating assembly according to an embodiment of the present application;

FIG. 2 is a cross-sectional view of a rotating assembly according to an embodiment of the present application;

fig. 3 is a schematic view of an installation structure of an outer iron core and an inner iron core according to an embodiment of the present application;

FIG. 4 is a schematic structural view of a shock-absorbing structure according to an embodiment of the present application;

FIG. 5 is a top view of a rotating assembly according to an embodiment of the present application;

fig. 6 is a schematic structural diagram of a rotating assembly according to an embodiment of the present application.

The reference numerals are represented as:

1. a damping rotor; 11. a shock-absorbing structure; 111. a first groove; 112. a connecting portion; 113. a shock-absorbing post; 114. a second protrusion; 115. a third groove; 116. a shock-absorbing structure positioning hole; 12. an inner core; 121. a first inner core; 122. a second inner core; 123. a first protrusion; 124. positioning holes of the inner iron core; 13. an outer core; 131. a first iron core portion; 1311. a radial limit piece; 132. a second iron core portion; 133. filling the hole; 134. an outer iron core positioning hole; 14. a shaft hole; 141. an iron core segment; 142. a shock absorbing section; 2. a rotating shaft; 21. an annular boss; 211. a second groove; 3. an injection molded part; 31. injection molding a cylinder; 32. a third protrusion; 33. injection molding a positioning hole; 4. and (5) magnetic steel.

Detailed Description

Referring to fig. 1-6 in combination, a rotating assembly comprises a damping rotor 1 and a rotating shaft 2, wherein the damping rotor 1 comprises a damping structure 11; pivot 2 and 11 mutual contacts of shock-absorbing structure, and pivot 2 can drive shock-absorbing structure 11 and rotate, rotates the in-process in pivot 2, and pivot 2 can directly drive shock-absorbing structure 11 and rotate to it is too big to have prevented shock-absorbing structure 11 and interior iron core 12 cooperation department from receiving the extrusion deformation, under long-time big moment of torsion operation, cracked problem appears in shock-absorbing structure 11, can also prevent 11 phenomena of coming unstuck of shock-absorbing structure, and shock-absorbing structure 11 is made by damping rubber. The damping rubber material can be one of ethylene propylene diene monomer, silicon rubber and chloroprene rubber; the method can solve the problems that the damping rubber of the damping rotor 1 is too large in deformation and cracks due to extrusion of the inner iron core 12; magnetic leakage is reduced, and the power density of the motor is increased; the tangential and axial strength of the damping rotor 1 is enhanced; the material cost of the rotor is reduced.

The application also discloses some embodiments, the damping rotor 1 is provided with a shaft hole 14, and the rotating shaft 2 is arranged in the shaft hole 14; shock-absorbing structure 11 includes the contact zone, and the contact zone is located shaft hole 14, and pivot 2 forms circumference spacingly with the contact zone for pivot 2 can drive the contact zone and rotate. In the process of rotating the rotating shaft 2, the rotating shaft 2 can directly drive the damping structure 11 to rotate, so that the situation that the matching position of the damping structure 11 and the inner iron core 12 is too large in extrusion deformation is prevented, the damping structure 11 breaks under long-time large-torque operation, and the phenomenon that the damping structure 11 is degummed can be prevented.

The application also discloses some embodiments, the shaft hole 14 comprises an iron core section 141 and a damping section 142 which are sequentially arranged in the axial direction of the rotating shaft 2; the damping rotor 1 further comprises an inner iron core 12, an iron core hole is formed in the inner iron core 12, the iron core hole forms an iron core section 141, and the rotating shaft 2 and the inner iron core 12 form circumferential limiting in the iron core section 141; that is, the rotating shaft 2 and the core segment 14 are circumferentially limited, the two do not move relatively, the rotating shaft 2 can drive the inner core 12 to rotate when rotating, the contact zone has an annular surface extending circumferentially around the rotating shaft 2, the annular surface forms the damping segment 142, and the rotating shaft 2 and the contact zone form circumferential limitation on the damping segment 142. Namely, a part of the inner wall of the shaft hole 14 is formed by the inner iron core 12, and a part of the inner wall is formed by the shock absorption structure 11, so that a part of the rotating shaft 2 is in direct contact with the inner iron core 12 to drive the inner iron core 12 to rotate, and a part of the rotating shaft 2 is in contact with a contact area of the shock absorption structure 11 to drive the shock absorption structure 11 to rotate, so that the iron core can be effectively driven to rotate, the problem of large deformation at the matching part of the shock absorption structure 11 and the inner iron core 12 is also reduced, the problem of breakage of the shock absorption structure 11 is solved, and the phenomenon of degumming of the shock absorption structure 11 can be prevented; compared with the silicon steel sheet with the same volume, the damping rubber has lower material cost equivalent to the damping structure 11 replacing a part of the rotor inner iron core 12, so that the cost of the rotor is reduced. A hole may be formed in the inner core 12, and a contact region may extend from the hole to an inner peripheral side of the inner core 12, contact the rotating shaft 2, and be rotated by the rotating shaft.

The present application also discloses some embodiments, the inner core 12 includes a first inner core 121 and a second inner core 122, the first inner core 121 and the second inner core 122 are sequentially disposed in the axial direction of the rotating shaft 2, and the contact region is located between the first inner core 121 and the second inner core 122. Namely, the inner iron core 12 of the damping rotor 1 adopts a layered structure and is divided into two layers, namely, a layer of damping structure 11, namely a contact zone, is filled between the two inner iron cores 12, the damping structure 11 is also filled between the two inner iron cores 12, so that the torsion action of the first bulge 123 on the first groove 111 on the inner circumferential side of the damping structure 11 can be reduced, the damping structure 11 is also filled between the two inner iron cores 12, the axial thickness of the contact zone can be set to be 30-50% of the axial height of the outer iron core 13, 3-6 second protrusions 114 are arranged at the inner circle of the contact area, the second protrusions 114 are matched with the same number of second grooves 211 on the rotating shaft 2, this enables the damping structure 11 to be directly engaged with the shaft 2, so that a portion of the torque force directly acts on the damping structure 11, thereby reducing the stress concentration of the first protrusion 123 on the first groove 111, preventing the damping structure 11 from being broken due to excessive stress, and the second groove 211 is a flat groove. The damping rubber is used for replacing a part of the inner iron core 12, and compared with the iron core material with the same volume, the damping rubber material has low cost, so that the material cost of the rotor is reduced; at the same time, subtracting a portion of the inner core 12 reduces the path of leakage flux, and therefore also increases the power density of the motor.

The rotating assembly further comprises an injection molding part 3, wherein the injection molding part 3 can be made of PBT or PA66 material, and a proper amount of glass fiber is added into the material to increase the strength; the injection molding part 3 is provided with third protrusions 32, the number of the third protrusions 32 is half of the number of the iron core parts, the third protrusions 32 are arranged between the adjacent first iron core parts 131 and the adjacent second iron core parts 132, namely, the positions of the third protrusions 32 are arranged corresponding to the positions of the radial limiting parts 1311, and the third protrusions 32 are matched with the third grooves 115 on the shock absorption structure 11 to ensure that the shock absorption structure 11 and the injection molding part 3 synchronously rotate. The radius of the third protrusion 32 is 0.5-1.5 mm smaller than that of the first protrusion 123, and since the third protrusion and the first protrusion are both made of hard materials and made of elastic materials, the tangential strength of the rotor can be increased, and excessive tangential displacement can be prevented. In order to prevent the third recess 115 of the damper structure 11 from being deformed and stressed too much due to the torsion of the third protrusion 32, the filling hole 133 of the outer core 13 is filled with the damper post 113, so as to enhance the overall strength of the damper rotor 1. The injection-molded part 3 also comprises an injection-molded cylinder 31.

The application also discloses some embodiments, be provided with the annular boss 21 around the circumference extension of pivot 2 on the pivot 2, interior iron core 12 sets up in the axial one side of annular boss 21, and annular boss 21 forms circumference spacing with the contact zone, and the axle design is the step shaft promptly, guarantees two interior iron core 12's income axle sizes. First interior iron core 121 sets up in the axial first side of annular boss 21, second interior iron core 122 sets up in the axial second side of annular boss 21, annular boss 21 corresponds the position and sets up the contact zone, iron core 12 adopts layered structure in the shock attenuation rotor 1, fill one deck shock attenuation between interior iron core 12 and glue, this layer of shock attenuation is glued interior round department and is equipped with the protruding 114 of second, epaxial flat slot is second recess 211 and the protruding 114 direct cooperation of second, it rotates to cause partly torsion direct drive shock attenuation glue, this can reduce the extrusion of interior iron core 12 to shock attenuation glue, thereby reduce the stress that shock attenuation glue received, prevent that the phenomenon of splitting from appearing in the shock attenuation glue, this layer of shock attenuation glue simultaneously and the both ends face of shock attenuation glue can both increase the axial strength of rotor, the phenomenon of coming unstuck prevents to appear.

The application also discloses some embodiments, the damping rotor 1 further comprises an outer iron core 13, and the damping structure 11 further comprises a damping area; the damping area is arranged between the outer iron core 13 and the inner iron core 12, a first protrusion 123 is arranged on the outer peripheral wall of the inner iron core 12, and a first groove 111 matched with the first protrusion 123 is arranged on the inner peripheral wall of the damping area. The first protrusion 123 and the first groove 111 cooperate to ensure that the inner core 12 and the shock-absorbing structure 11 rotate synchronously.

The application also discloses some embodiments, the outer iron core 13 comprises a plurality of iron core parts which are circumferentially arranged around the rotating shaft 2, and a magnetic steel slot is formed between every two adjacent iron core parts; the core portion includes first core portions 131 and second core portions 132 arranged alternately, a radial stopper 1311 is provided on an inner peripheral side of the first core portion 131, and the radial stoppers 1311 extend to both sides of the first core portion 131 in the circumferential direction. The cross section of the radial limiting pieces 1311 is triangular, half of the iron core portions are provided with axial limiting pieces to form the first iron core portion 131, the other half of the iron core portions are not provided with the radial limiting pieces 1311 to form the second iron core portion 132, and the first iron core portion 131 and the second iron core portion 132 are arranged at intervals and can play a role in limiting the magnetic steel 4 and preventing the outer iron core 13 from being separated. The radial position-limiting piece 1311 can limit the magnetic steel 4, and also enhance the structural strength of the outer core 13, and the number of the first protrusions 123 on the inner core 12 is half of that of the core part.

The present application also discloses some embodiments, the first protrusion 123 and the radial stop 1311 are disposed in a staggered manner in the circumferential direction of the rotating shaft 2. The radial position-limiting pieces 1311 of the outer iron core 13 are staggered with the first convex parts of the inner iron core 12, so that the distance between the inner iron core 13 and the outer iron core 13 is increased, and the magnetic flux leakage is reduced due to the fact that a part of the inner iron core 12 is reduced, and the power density of the motor is increased. The first protrusion 123 is disposed to be offset from the radial stopper 1311, that is, the first protrusion 123 is aligned with the second core portion 132 without the first protrusion, and this position can ensure that the distance between the outer core 13 and the inner core 12 is large enough, so as to reduce the magnetic flux leakage caused by the magnetic induction line passing through the inner core 12, thereby increasing the power density of the motor.

The application also discloses some embodiments, the shock-absorbing structure 11 further comprises two connecting parts 112 and a shock-absorbing column 113, the two connecting parts 112 are respectively connected with two axial ends of the shock-absorbing area, the shock-absorbing column 113 extends from one axial end of the shock-absorbing area to the other axial end of the shock-absorbing area, and the shock-absorbing column 113 is connected with both the two connecting parts 112; the outer core 13 is provided with a filling hole 133 extending in the axial direction, and the damper post 113 is disposed in the filling hole 133. The outer iron core 13 is provided with a square hole to form a filling hole 133 for positioning during plastic injection and package, so that the problem of low concentricity of the segmented outer iron core 13 is solved. An outer iron core positioning hole 134 is also formed in the outer iron core 13, the outer iron core positioning hole 134 is a round hole, plastic-coated plastics are injected into the outer iron core 13 positioning hole, the rotor strength is enhanced, and the phenomenon that the segmented outer iron core 13 is damaged due to overlarge centrifugal force to cause displacement and even separation of the plastic-coated plastics is avoided. The shock-absorbing column 113 and the two end faces of the connecting part 112 play a role in enhancing the axial strength of the rotor, so that the shock-absorbing structure 11 and the inner iron core 12 are prevented from axial displacement or degumming. The filling hole 133 is a square hole.

This application shock attenuation rotating assembly's production process does:

laminating the outer iron core 13 and the inner iron core 12: the iron core is formed by laminating punching sheets through buckling points, and the punching sheets are 0.5mm silicon steel sheets;

positioning the outer iron core 13 and the magnetic steel 4: the outer iron core 13 is tangentially and radially positioned by the filling hole 133; the injection positioning hole 33 is used for axially positioning the outer iron core 13, and the magnetic steel 4 is positioned by the position of the outer iron core 13 and the radial limiting piece 1311;

thirdly, plastic is injected and coated;

fourthly, pressing the inner iron core 12 into the rotating shaft 2: the rotating shaft 2 is designed as a stepped shaft, the height of the annular boss 21 is the spacing height between the first inner iron core 121 and the second inner iron core 122, that is, the annular boss 21 ensures the shaft entering size of the first inner iron core 121 and the second inner iron core 122, and the inner iron core positioning hole 124 ensures that the two inner iron cores 12 are aligned;

positioning the inner iron core 12 and the outer iron core 13: the tangential radial positioning of the inner iron core 12 is completed by the positioning hole of the inner iron core 12 and the rotating shaft 2, the axial direction is completed by the positioning hole of the damping structure 11, the positioning hole of the inner iron core 12 is aligned with one of the positioning holes 116 of the damping structure, the outer diameter is smaller, the positioning of the inner iron core 12 in all directions can be completed simultaneously, and the positioning of the outer iron core 13 (at the moment, the outer iron core 13 and the magnetic shoe are molded into a whole by plastic coating) is completed by the injection positioning hole 33 left when the plastic coating is injected;

sixthly, the injection molding shock absorption structure 11. The fourth process can be performed simultaneously with the first to third processes.

According to an embodiment of the present application, there is provided a motor including a rotating assembly as described above.

It is readily understood by a person skilled in the art that the advantageous ways described above can be freely combined, superimposed without conflict.

The present invention is not intended to be limited to the particular embodiments shown and described, but is to be accorded the widest scope consistent with the principles and novel features herein disclosed. The foregoing is only a preferred embodiment of the present application, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present application, and these modifications and variations should also be considered as the protection scope of the present application.

Claims (10)

1. A rotating assembly, comprising:

-a damping rotor (1), said damping rotor (1) comprising a damping structure (11);

and the rotating shaft (2), the rotating shaft (2) is in mutual contact with the damping structure (11), and the rotating shaft (2) can drive the damping structure (11) to rotate.

2. The rotating assembly according to claim 1, wherein the damper rotor (1) has a shaft hole (14), and the rotating shaft (2) is disposed in the shaft hole (14); shock-absorbing structure (11) include the contact zone, the contact zone is located in shaft hole (14), pivot (2) with the contact zone forms circumference spacing, makes pivot (2) can drive the contact zone rotates.

3. The rotating assembly according to claim 2, wherein the shaft hole (14) comprises a core segment (141) and a damper segment (142) which are arranged in this order in the axial direction of the rotating shaft (2); the damping rotor (1) further comprises an inner iron core (12), an iron core hole is formed in the inner iron core (12), the iron core hole forms the iron core section (141), and the rotating shaft (2) and the inner iron core (12) form circumferential limiting in the iron core section (141); the contact zone has an annular surface extending circumferentially around the axis of rotation (2), the annular surface forming the damper segment (142), the axis of rotation (2) forming a circumferential stop with the contact zone at the damper segment (142).

4. The rotating assembly according to claim 3, wherein the inner core (12) includes a first inner core (121) and a second inner core (122), the first inner core (121) and the second inner core (122) are sequentially arranged in an axial direction of the rotating shaft (2), and the contact region is located between the first inner core (121) and the second inner core (122).

5. The rotating assembly according to claim 3, wherein the rotating shaft (2) is provided with an annular boss (21) extending around the circumference of the rotating shaft (2), the inner core (12) is arranged on one axial side of the annular boss (21), and the annular boss (21) forms a circumferential limit with the contact area.

6. A rotating assembly according to claim 3, wherein the damping rotor (1) further comprises an outer core (13), the damping structure (11) further comprising a damping zone; the damping region set up in outer iron core (13) with between interior iron core (12), be provided with first arch (123) on the periphery wall of interior iron core (12), be provided with on the internal perisporium in damping region with first recess (111) of first arch (123) looks adaptation.

7. Rotating assembly according to claim 6, wherein the outer core (13) comprises a plurality of core portions arranged circumferentially around the shaft (2), a magnetic steel (4) slot being formed between two adjacent core portions; the iron core part comprises a first iron core part (131) and a second iron core part (132) which are arranged in a staggered mode, a radial limiting piece (1311) is arranged on the inner peripheral side of the first iron core part (131), and the radial limiting pieces (1311) extend towards two sides of the first iron core part (131) in the circumferential direction.

8. The rotary assembly according to claim 7, wherein the first protrusion (123) and the radial stop (1311) are offset in the circumferential direction of the rotary shaft (2).

9. The rotating assembly according to claim 6, wherein the damping structure (11) further comprises two connecting portions (112) and a damping column (113), the two connecting portions (112) are respectively connected with two axial ends of the damping region, the damping column (113) extends from one axial end of the damping region to the other axial end, and the damping column (113) is connected with both connecting portions (112); the outer iron core (13) is provided with an axially extending filling hole (133), and the shock absorption column (113) is arranged in the filling hole (133).

10. An electrical machine comprising a rotating assembly, wherein the rotating assembly is as claimed in any one of claims 1 to 9.

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