Motor rotor core pressing structure, motor rotor structure and motor

Abstract

The utility model provides a motor rotor core pressing structure, a motor rotor structure and a motor, and belongs to the technical field of motors, the motor rotor core pressing structure comprises a rotor main shaft, a clamping groove and a positioning sleeve, the clamping groove is arranged at one end of the rotor main shaft far away from a shaft shoulder, and a rotor core assembly is sleeved between the clamping groove and the shaft shoulder; the positioning sleeve is embedded in the clamping groove, the near end of the positioning sleeve is used for being attached to the rotor iron core assembly, and the far end of the positioning sleeve is used for being attached to the far-end bearing. According to the motor rotor iron core pressing structure provided by the utility model, the axial size of the rotor is shortened through the cooperation of the clamping groove and the positioning sleeve, the bearing not smaller than the inner diameter of the rotor main shaft can be selected, the advantages of a locking nut and a check ring can be combined, the defects of the locking nut and the check ring can be avoided, and the stability of the rotor structure is ensured.

Description

TECHNICAL FIELD

[0001] The utility model belongs to motor technical field, more specifically, relate to a motor rotor iron core pressure structure, motor rotor structure and motor. BACKGROUND

[0002] The weight requirement of each part of the flying car is very strict, the volume of the motor and the rotor of the flying car ducted motor is compressed, resulting in that the inner diameter of the bearing is small.

[0003] The traditional ducted motor rotor fixed iron core mode includes two kinds, the first kind is fixed by lock nut, but the lock nut occupies large axial space, which is not conducive to the miniaturization of the rotor, the second kind is fixed by the snap spring, but the thickness of the snap spring is small, and the snap spring cannot bear large axial force, and when the snap spring structure is used, the distal end bearing can only be matched with the shaft shoulder of the shaft end by reducing the inner diameter, otherwise the contact area between the distal end bearing and the shaft shoulder is too small, and the risk of crushing exists. UTILITY MODEL CONTENTS

[0004] The utility model discloses a motor rotor iron core pressure structure, motor rotor structure and motor, which aims at realizing the shortening of axial size and avoiding the problem of reducing the inner diameter of the distal end bearing, and guaranteeing the stability of the rotor structure.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the technical scheme of providing a motor rotor iron core pressure structure, motor rotor structure and motor, which comprises a rotor spindle, a clamping groove and a positioning sleeve, the clamping groove is arranged at one end of the rotor spindle away from the shaft shoulder, and the clamping groove and the shaft shoulder are used for sleeving the rotor iron core assembly; the positioning sleeve is embedded in the clamping groove, the proximal end of the positioning sleeve is used for abutting the rotor iron core assembly, and the distal end of the positioning sleeve is used for abutting the distal end bearing.

[0006] As another embodiment of the application, the clamping groove is an annular groove.

[0007] As another embodiment of the application, the positioning sleeve is an annular sleeve.

[0008] As another embodiment of the application, the outer diameter of the shaft at the clamping groove is consistent with the inner diameter of the positioning sleeve, and the depth of the clamping groove is consistent with the inner diameter change amount of the positioning sleeve caused by thermal expansion and cold shrinkage.

[0009] As another embodiment of the application, the outer diameter of the positioning sleeve is greater than the outer diameter of the inner ring of the distal end bearing.

[0010] As another embodiment of the application, the outer peripheral edge of one end of the positioning sleeve close to the distal end bearing has a gap, and the outer diameter of the end face of the distal end of the positioning sleeve is consistent with the outer diameter of the inner ring of the distal end bearing.

[0011] The beneficial effect of the motor rotor core clamping structure provided by the utility model is that: compared with the existing technology, the motor rotor core clamping structure of the utility model, the cooperation of the clamping groove and the positioning sleeve enables the rotor to shorten the axial dimension while selecting a bearing that is not less than the inner diameter of the rotor main shaft, can have the advantages of both the locking nut and the retaining ring, and can also avoid the disadvantages of the locking nut and the retaining ring, thereby ensuring the stability of the rotor structure.

[0012] A motor rotor structure is also provided, comprising the above-mentioned motor rotor core clamping structure, and also comprising a rotor core assembly, a proximal bearing and a distal bearing; the rotor core assembly is sleeved on the rotor main shaft and rests against the shaft shoulder and is limited by a positioning sleeve; the proximal bearing rests against the side of the shaft shoulder away from the rotor core, and the distal bearing rests against the distal end of the positioning sleeve.

[0013] The beneficial effects of the motor rotor structure provided by the utility model are as follows: compared with the prior art, the motor rotor structure of the utility model realizes the positioning of the rotor core assembly; the other side of the positioning sleeve is in contact with the inner ring of the distal bearing to bear the axial force of the distal bearing; the motor rotor structure solves the problem of reducing the inner diameter of the distal bearing, while avoiding the increase of the axial dimension, thereby achieving the miniaturization of the rotor structure.

[0014] As another embodiment of the present application, the rotor core assembly includes a core body and two core baffles, the two core baffles are respectively located at both ends of the core body, and one core baffle rests on the shaft shoulder, and the other core baffle rests on the proximal end of the positioning sleeve.

[0015] Also provided is a motor which adopts the above-mentioned motor rotor structure.

[0016] The beneficial effect of the motor provided by the present invention is that: compared with the prior art, the motor of the present invention adopts the above-mentioned motor rotor structure, has all the beneficial effects it has, solves the problem of reducing the inner diameter of the distal bearing, and avoids the increase of the axial dimension, thereby achieving miniaturization of the rotor structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 A schematic diagram of the structure of the motor rotor structure provided by an embodiment of the utility model;

[0019] Figure 2A schematic structural diagram of a rotor main shaft provided in an embodiment of the present utility model;

[0020] Figure 3 This is a schematic diagram of the connection structure between the card slot and the positioning sleeve provided in an embodiment of the utility model.

[0021] In the figure: 10, distal bearing; 20, positioning sleeve; 30, core baffle; 40, core body; 50, rotor main shaft; 60, slot. DETAILED DESCRIPTION

[0022] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0023] See also Figures 1 to 3 The motor rotor core compression structure, motor rotor structure, and motor provided by the present invention are now described. The motor rotor core compression structure includes a rotor main shaft 50, a slot 60, and a positioning sleeve 20. The slot 60 is provided at the end of the rotor main shaft 50 away from the shaft shoulder. The rotor core assembly is sleeved between the slot 60 and the shaft shoulder. The positioning sleeve 20 is embedded in the slot 60. The proximal end of the positioning sleeve 20 is used to fit the rotor core assembly, and the distal end of the positioning sleeve 20 is used to fit the distal bearing 10.

[0024] Compared with the prior art, the motor rotor core pressing structure provided by the present invention has a shaft shoulder at one end of the rotor main shaft 50, and the other end is pressed and limited by a structure in which a clamping groove 60 and a positioning sleeve 20 are combined; the width of the clamping groove 60 along the axial direction of the rotor main shaft 50 is consistent with the width between the rotor core assembly and the distal bearing 10; the positioning sleeve 20 located in the clamping groove 60 is limited by the clamping sleeve, and the inner wall of the positioning sleeve 20 is fitted to the bottom of the slot 60, and the front of the positioning sleeve 20 is The rear end surface is respectively fitted on the two side walls of the slot 60; the proximal end of the positioning sleeve 20 is fitted with the rotor core assembly and limits the rotor core assembly, and the distal end of the positioning sleeve 20 is fitted with the distal bearing 10 and withstands the axial force applied to it by the bearing; the cooperation between the slot 60 and the positioning sleeve 20 allows the rotor to shorten the axial dimension while selecting a bearing that is not less than the inner diameter of the rotor main shaft 50, which can have the advantages of both the locking nut and the retaining ring, and can also avoid the disadvantages of the locking nut and the retaining ring, thereby ensuring the stability of the rotor structure.

[0025] The above-mentioned clamping groove 60 is an annular groove perpendicular to the axial direction of the rotor main shaft 50, and the corresponding positioning sleeve 20 is also an annular sleeve. The positioning sleeve 20 is made of rigid material, and the positioning sleeve 20 is sleeved on the distal end of the rotor main shaft 50 by high-temperature heating. When the positioning sleeve 20 is sleeved outside the clamping groove 60, the positioning sleeve 20 is naturally cooled or artificially cooled, so that it is cold-shrunk and embedded in the clamping groove 60.

[0026] The outer diameter of the shaft at the clamping groove 60 is consistent with the inner diameter of the positioning sleeve 20. After the positioning sleeve 20 is heated at high temperature, the inner side wall of the positioning sleeve 20 is sleeved on the outside of the rotor main shaft 50 and can slide along the axial direction of the rotor main shaft 50; after the positioning sleeve 20 is cooled and restored, the inner side of the positioning sleeve 20 is fitted to the groove bottom of the clamping groove 60.

[0027] The depth of the clamping groove 60 is consistent with the change amount of the inner diameter of the positioning sleeve 20 when it is heated and shrunk. When the positioning sleeve 20 is heated at high temperature, the inner side wall of the positioning sleeve 20 is consistent with the outer diameter of the rotor main shaft 50, and after the positioning sleeve 20 is cooled, the inner side wall of the positioning sleeve 20 is reduced and fitted to the end face of the groove bottom of the clamping groove 60.

[0028] The outer diameter of the positioning sleeve 20 is greater than the outer diameter of the inner ring of the distal end bearing 10. After the positioning sleeve 20 is cooled and embedded in the clamping groove 60, the outer side wall of the positioning sleeve 20 is located on the outside of the rotor main shaft 50, and the positioning sleeve 20 forms an annular limiting structure at the end of the rotor main shaft 50, which is used to abut against the core assembly and achieve the effect of supporting the distal end bearing 10.

[0029] The outer peripheral edge of the end of the positioning sleeve 20 close to the distal end bearing 10 has a gap, and the outer diameter of the end face of the distal end of the positioning sleeve 20 is consistent with the outer diameter of the inner ring of the distal end bearing 10. The outer side wall of the positioning sleeve 20 is higher than the inner ring of the distal end bearing 10, and in order to avoid the end face of the positioning sleeve 20 affecting the rotation of the distal end bearing 10, the outer side edge of the contact surface between the positioning sleeve 20 and the distal end bearing 10 forms a gap.

[0030] As Figures 1 to 3 , a motor rotor structure is also provided, which comprises the above-mentioned motor rotor core pressing structure, and further comprises a rotor core assembly, a proximal end bearing and a distal end bearing 10; the rotor core assembly is sleeved on the rotor main shaft 50 and abuts against the shaft shoulder and is limited by the positioning sleeve 20; the proximal end bearing abuts against the side of the shaft shoulder away from the rotor core, and the distal end bearing 10 abuts against the distal end of the positioning sleeve 20.

[0031] Compared with the prior art, the motor rotor structure provided by the present invention has a rotor core assembly mounted on the rotor main shaft 50 and resting on the shaft shoulder, a retaining groove 60 is located on the other side of the rotor core assembly, a positioning sleeve 20 is embedded in the retaining groove 60, and the end face of the positioning sleeve 20 rests on the side of the rotor core assembly away from the shaft shoulder, thereby positioning the rotor core assembly; the other side of the positioning sleeve 20 is in contact with the inner ring of the distal bearing 10, bearing the axial force of the distal bearing 10; the motor rotor structure solves the problem of reducing the inner diameter of the distal bearing 10, while avoiding an increase in the axial dimension, thereby achieving miniaturization of the rotor structure.

[0032] The inner diameter of the distal bearing 10 matches the outer diameter of the rotor main shaft 50. Instead of being restrained by a shoulder on the rotor main shaft 50, the distal bearing 10 utilizes the positioning sleeve 20 for both positional restraint and force transmission, increasing the contact area. Furthermore, after cooling, the positioning sleeve 20 achieves a stable fit within the retaining groove 60, ensuring the operational stability of the rotor structure.

[0033] The rotor core assembly includes a core body 40 and two core baffles 30 . The two core baffles 30 are respectively located at both ends of the core body 40 , with one core baffle 30 resting on the shaft shoulder and the other core baffle 30 resting on the proximal end of the positioning sleeve 20 .

[0034] The rotor core assembly is installed with the first core baffle 30, the core body 40 and the second core baffle 30 in sequence along the length direction of the rotor main shaft 50 from the end with the shaft shoulder to the slot 60, wherein the second core baffle 30 is abutted by the positioning sleeve 20, and under the abutting action of the positioning sleeve 20, the first core baffle 30 is abutted against the shaft shoulder.

[0035] A motor is also provided, which adopts the motor rotor structure.

[0036] Compared with the prior art, the motor provided by the present invention adopts the above-mentioned motor rotor structure and has all the beneficial effects thereof, solves the problem of reduced inner diameter of the distal bearing 10, avoids increase in axial dimension, and achieves miniaturization of the rotor structure.

[0037] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. The motor rotor core pressing structure is characterized by: The invention comprises a rotor main shaft (50), a slot (60) and a positioning sleeve (20), wherein the slot (60) is opened at one end of the rotor main shaft (50) away from the shaft shoulder, and a rotor core assembly is sleeved between the slot (60) and the shaft shoulder; the positioning sleeve (20) is embedded in the slot (60), the proximal end of the positioning sleeve (20) is used to fit the rotor core assembly, and the distal end of the positioning sleeve (20) is used to fit the distal bearing (10).

2. The motor rotor core pressing structure according to claim 1, characterized in that: The clamping groove (60) is an annular groove.

3. The motor rotor core pressing structure according to claim 2, characterized in that: The positioning sleeve (20) is an annular sleeve.

4. The motor rotor core pressing structure according to claim 3, characterized in that: The outer diameter of the shaft at the clamping groove (60) is consistent with the inner diameter of the positioning sleeve (20); the depth of the clamping groove (60) is consistent with the amount of change in the inner diameter of the positioning sleeve (20) due to thermal expansion and contraction.

5. The motor rotor core pressing structure according to claim 3, characterized in that: The outer diameter of the positioning sleeve (20) is greater than the outer diameter of the inner ring of the distal bearing (10).

6. The motor rotor core pressing structure according to claim 5, characterized in that: The outer peripheral edge of one end of the positioning sleeve (20) close to the distal bearing (10) has a clearance notch, and the outer diameter of the distal end surface of the positioning sleeve (20) is consistent with the outer diameter of the inner ring of the distal bearing (10).

7. The motor rotor structure is characterized by: The motor rotor core clamping structure comprises the motor rotor core clamping structure as described in any one of claims 1 to 5, and further comprises a rotor core assembly, a proximal bearing and a distal bearing (10); the rotor core assembly is sleeved on the rotor main shaft (50) and abuts against the shaft shoulder and is limited by the positioning sleeve (20); the proximal bearing abuts against the side of the shaft shoulder away from the rotor core, and the distal bearing (10) abuts against the distal end of the positioning sleeve (20).

8. The motor rotor structure according to claim 7, characterized in that: The rotor core assembly comprises an iron core body (40) and two iron core baffles (30), wherein the two iron core baffles (30) are respectively located at two ends of the iron core body (40), and one of the iron core baffles (30) abuts against the shaft shoulder, and the other iron core baffle (30) abuts against the proximal end of the positioning sleeve (20).

9. The motor is characterized in that The motor rotor structure according to any one of claims 7 to 8 is adopted.

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