Detachable coaxial rotor

Abstract

The detachable coaxial rotor comprises a main shaft and a rotor of integrated equipment, and is characterized in that the rotor is sleeved on the main shaft and is axially pressed through a pressing piece on the main shaft, the rotor comprises a permanent magnet and a sheath fixed outside the permanent magnet, and the sheath is provided with a pull-out structure which can be matched with a pull-out tool to pull the rotor out of the main shaft. According to the utility model, the rotor is simple and convenient to mount and dismount, the requirements of interchangeability and easy integration of the small-sized high-speed generator are met, the rotor and the integrated equipment share the main shaft, middleware transmission is omitted, the structural strength is improved, the power loss is reduced, and the power density of transmission is improved.

Description

Technical Field

[0001] The utility model relates to a detachable coaxial rotor, belonging to the technical field of motor assembly. Background Art

[0002] Developing lightweight and small unmanned helicopters is one of the hotspots in aviation research, which also puts forward higher requirements for power density and smaller volume of motors for aircraft. To improve the integration and reduce the volume, the motor rotor and the integrated equipment of the aircraft share a rotating shaft. However, when the motor rotor needs to be replaced, the rotor is difficult to disassemble and the replacement is complex.

[0003] For example, a detachable motor rotor structure is disclosed in CN106451862B. This structure can realize the overall disassembly of the motor rotor. The rotor is assembled and fixed through grooves, concave blocks, notches, a baffle plate, a U-shaped fixing plate, etc. The disadvantages of this solution are that the structure is complex, the dimensional process requirements of the structure are relatively high, and the rotor needs to be disassembled, and the replacement is complex. A detachable rotor is disclosed in CN204145117U. The rotor punching sheets are divided into 4 pieces and stacked and assembled with clamping parts. The rotating shaft is correspondingly provided with 4 installation parts, and the clamping parts are connected to the installation parts to realize the disassembly and assembly of the rotor. The disadvantages of this solution are that the structure is complex, the rotating shaft is not suitable for high-speed working conditions, and the structural strength of the rotor is limited. A main shaft detachable outer rotor generator is disclosed in CN217063484U. The end cover is clamped by a blocking ring and an end plate to ensure that the main shaft will not fall off from the end cover. The disadvantages of this solution are that the structure is relatively complex, the disassembly is not convenient enough, and it is generally applicable to medium and large motors with relatively low speed and large outer diameter, and it is not suitable for motors with small outer diameter and high speed.

[0004] The coaxial rotor structures in the prior art are complex and not convenient enough to disassemble, and cannot meet the requirements of interchangeability and easy integration of small high-speed generators. Content of the Utility Model

[0005] The detachable coaxial rotor provided by the utility model is simple and convenient for both installation and disassembly, meets the requirements of interchangeability and easy integration of small high-speed generators. The rotor and the integrated equipment share the main shaft, eliminating the intermediate transmission parts, improving the structural strength, reducing the power loss, and increasing the power density of the transmission.

[0006] To achieve the above object, the technical solution adopted by the utility model is:

[0007] The detachable coaxial rotor includes the main shaft of the integrated equipment and the rotor. It is characterized in that: the rotor is sleeved on the main shaft and axially pressed by a pressing member on the main shaft. The rotor includes a permanent magnet and a sheath fixed outside the permanent magnet. The sheath is provided with a pulling-out structure that can cooperate with a pulling-out tool to pull out the rotor from the main shaft.

[0008] Preferably, a positioning shoulder that abuts against the inner end face of the permanent magnet is provided on the main shaft, and the pressing member axially presses the permanent magnet against the positioning shoulder.

[0009] Preferably, the pressing member includes a pressing nut threadedly fitted on the main shaft and a pressing cylinder located inside the pressing nut. The outer diameter of the pressing cylinder is smaller than that of the pressing nut, and the pressing cylinder is fitted on the main shaft with a clearance fit. The pressing nut axially presses the permanent magnet through the pressing cylinder.

[0010] Preferably, the outer end of the sheath extends beyond the outer end face of the permanent magnet. The pulling-out structure is an annular flange formed by inwards folding the outer end of the sheath by 90 degrees. The inner diameter of the annular flange is larger than the outer diameter of the pressing cylinder, and an axial gap for the pulling-out tool to enter is formed between the annular flange and the outer end face of the permanent magnet.

[0011] Preferably, an arc-shaped concave notch that concaves inwards in the radial direction is provided on the edge of the annular flange. The number of arc-shaped concave notches is at least two, and a plurality of arc-shaped concave notches are evenly spaced along the circumferential direction of the annular flange. The pulling-out tool enters the axial gap between the annular flange and the outer end face of the permanent magnet through the arc-shaped concave notch.

[0012] The beneficial effects of the present utility model are as follows:

[0013] The detachable coaxial rotor of the present utility model has the rotor sleeved on the main shaft and axially pressed by the pressing member. The main shaft and the rotor are connected into a whole through the pressing member, and the structure is simple and compact. A pulling-out structure is provided on the sheath. When the rotor needs to be replaced, first disassemble the pressing member, and then pull out the rotor from the main shaft through the cooperation of the pulling-out structure and the pulling-out tool. The installation and disassembly of the rotor are both simple and convenient, without the need to disassemble the rotor, meeting the requirements of interchangeability and easy integration of small high-speed generators. The rotor and the integrated device share the main shaft, eliminating the intermediate transmission member, improving the structural strength, reducing power loss, and increasing the power density of the transmission. Description of the Drawings

[0014] Figure 1 It is a schematic diagram of the detachable coaxial rotor of the present utility model.

[0015] Figure 2 It is a schematic diagram of the rotor.

[0016] Figure 3 It is a schematic diagram of the pulling-out tool. Detailed Embodiment

[0017] The following Figures 1 to 3 makes a detailed description of the embodiments of the present utility model.

[0018] Detachable coaxial rotor, including the main shaft 1 and the rotor 2 of the integrated device, characterized in that: the rotor 2 is sleeved on the main shaft 1 and axially pressed by the pressing member 3 on the main shaft 1. The rotor 2 includes a permanent magnet 21 and a sheath 22 fixed outside the permanent magnet 21. The sheath 22 has a pulling-out structure that can cooperate with the pulling-out tool 100 to pull out the rotor 2 from the main shaft 1.

[0019] For the above-mentioned detachable coaxial rotor, the rotor 2 is sleeved on the main shaft 1 and axially pressed by the pressing member 3. The main shaft 1 and the rotor 2 are connected into a whole through the pressing member 3. The structure is simple and compact. A pulling-out structure is provided on the sheath 22. When the rotor needs to be replaced, first disassemble the pressing member, and then cooperate the pulling-out structure with the pulling-out tool 100 to pull out the rotor 2 from the main shaft 1. The installation and disassembly of the rotor are simple and convenient, without splitting the rotor, meeting the requirements of interchangeability and easy integration of small high-speed generators. The rotor and the integrated device share the main shaft, eliminating the intermediate transmission, improving the structural strength, reducing power loss, and increasing the power density of the transmission.

[0020] Among them, the main shaft 1 has a positioning shoulder 11 that abuts against the inner end face of the permanent magnet 21. The pressing member 3 axially presses the permanent magnet 21 against the positioning shoulder 21. The pressing member 3 axially presses the permanent magnet member 21 against the positioning shoulder 21. During operation, the rotor 2 drives the main shaft 1 to rotate synchronously through the pressing member 3 and transmits power to the integrated device on the main shaft 1.

[0021] Among them, the pressing member 3 includes a pressing nut 31 threadedly fitted on the main shaft 1 and a pressing cylinder 32 located inside the pressing nut 31. The outer diameter of the pressing cylinder 32 is smaller than the outer diameter of the pressing nut 31. The pressing cylinder 32 is sleeved on the main shaft 1 with a clearance fit. The pressing nut 31 axially presses the permanent magnet 21 through the pressing cylinder 32. The pressing nut 31 presses the pressing cylinder 32, and the pressing cylinder 32 presses the permanent magnet 21. The smaller outer diameter of the pressing cylinder 32 can reduce the radial space at the end of the pressing member 3 close to the sheath 22, leaving space for forming the pulling-out structure on the sheath 22.

[0022] Among them, the outer end of the sheath 22 extends beyond the outer end face of the permanent magnet 21. The pulling-out structure is an annular flange 23 formed by inwards folding the outer end of the sheath 22 by 90 degrees. The inner diameter of the annular flange 23 is larger than the outer diameter of the pressing cylinder 32. An axial gap for the pulling-out tool 100 to enter is formed between the annular flange 23 and the outer end face of the permanent magnet 21. A radial gap is formed between the annular flange 23 and the pressing cylinder 32, and an axial gap is formed between the annular flange 23 and the outer end face of the permanent magnet 21. When the rotor needs to be disassembled, after removing the pressing member 3 from the main shaft 1, the pulling-out tool 100 enters the axial gap between the annular flange 23 and the outer end face of the permanent magnet 21, and pulls the sheath 22 axially outwards to pull out the rotor 2 from the main shaft 1.

[0023] Wherein, an arc-shaped concave opening 231 concave inward in the radial direction is arranged on the edge of the annular flanging 23. The number of the arc-shaped concave openings 231 is at least two, and a plurality of arc-shaped concave openings 231 are evenly spaced along the circumferential direction of the annular flanging 23. The extraction tool enters the axial gap between the annular flanging 23 and the outer end face of the permanent magnet 21 from the arc-shaped concave opening 231. As Figures 2 to 3 shown, the extraction tool 100 is a sleeve that can be sleeved on the main shaft 1. An arc-shaped piece 101 corresponding to the arc-shaped concave opening 231 is arranged at the end of the sleeve. After removing the pressing member 3 from the main shaft 1, the extraction tool 100 is sleeved on the main shaft 1 to align the arc-shaped piece 101 with the arc-shaped concave opening 231. Then, the extraction tool 1 is inserted into the radial gap between the pressing cylinder 32 and the annular flanging 23. Then, the sleeve is rotated to stagger the arc-shaped piece 101 from the arc-shaped concave opening 231 and enter the axial gap between the annular flanging 23 and the outer end face of the permanent magnet 21. Then, the extraction tool 100 is pulled outwards, and the annular flanging 23 is pulled by the arc-shaped piece 101 to pull out the rotor 2 from the main shaft 1, realizing the disassembly of the rotor 2. The disassembly of the rotor 2 is convenient and simple. The extraction tool 100 adopted is simple and easy to form. The rotor 2 is integrally pulled out from the main shaft without disassembling the rotor, meeting the requirements of interchangeability and easy integration of small high-speed generators.

[0024] The technical solutions of the embodiments of the present invention are completely described above in conjunction with the accompanying drawings. It should be noted that the described embodiments are only a part of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the protection scope of the present invention.

Claims

1. A detachable coaxial rotor, comprising a main shaft and a rotor of an integrated device, characterized in that: The rotor is sleeved on the main shaft and axially compressed by a clamping piece on the main shaft. The rotor comprises a permanent magnet and a sleeve fixed outside the permanent magnet. The sleeve has a pull-out structure that can cooperate with a pull-out tool to pull the rotor out of the main shaft.

2. The detachable coaxial rotor according to claim 1, characterized in that: The main shaft is provided with a positioning shoulder which abuts against the inner end surface of the permanent magnet, and the pressing piece presses the permanent magnet onto the positioning shoulder along the axial direction.

3. The detachable coaxial rotor according to claim 2, characterized in that: The clamping piece includes a clamping nut threadedly sleeved on the main shaft and a pressure sleeve located inside the clamping nut. The outer diameter of the pressure sleeve is smaller than that of the clamping nut. The pressure sleeve is sleeved on the main shaft with clearance. The clamping nut axially presses the permanent magnet through the pressure sleeve.

4. The detachable coaxial rotor according to claim 3, characterized in that: The outer end of the sheath extends out of the outer end surface of the permanent magnet, and the extraction structure is an annular flange formed by folding the outer end of the sheath inward by 90 degrees. The inner diameter of the annular flange is larger than the outer diameter of the pressing cylinder, and an axial gap is formed between the annular flange and the outer end surface of the permanent magnet for the extraction tool to enter.

5. The detachable coaxial rotor according to claim 4, characterized in that: The edge of the annular flange is provided with an arc-shaped inner recess which is concave inward in the radial direction. There are at least two arc-shaped inner recesses, which are evenly spaced along the circumference of the annular flange. The extraction tool enters the axial gap between the annular flange and the outer end face of the permanent magnet through the arc-shaped inner recesses.

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