CN216699744U - Disc type permanent magnet synchronous motor with reading head protection - Google Patents
Disc type permanent magnet synchronous motor with reading head protection Download PDFInfo
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- CN216699744U CN216699744U CN202122793767.2U CN202122793767U CN216699744U CN 216699744 U CN216699744 U CN 216699744U CN 202122793767 U CN202122793767 U CN 202122793767U CN 216699744 U CN216699744 U CN 216699744U
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- permanent magnet
- magnet synchronous
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Abstract
The utility model discloses a disc type permanent magnet synchronous motor with a reading head protection function, which comprises a rotor iron core, a stator iron core, a rotor shaft sleeve, a shell and an encoder, wherein the rotor iron core is arranged on the rotor shaft sleeve; according to the technical scheme provided by the utility model, the reading head protective frame is abutted against the reading head mounting seat to generate a supporting force for the reading head mounting seat, so that the reading head, the reading head mounting seat and the magnetic ring always keep a gap without relative displacement, the gear teeth of the magnetic ring cannot impact the reading head, the structure is simple, the cost is low, the installation is easy, and the protection effect is obvious.
Description
Technical Field
The utility model relates to the field of motors, in particular to a disc type permanent magnet synchronous motor with reading head protection.
Background
The encoder is a device which compiles detection signals or data and converts the detection signals or data into signal forms which can be used for communication, transmission and storage, and is widely applied to the fields of motors, automobiles, wind power, robots and the like. The magnetic ring encoder has the advantages of simple structure, strong anti-interference capability, high response speed, easiness in installation and the like.
In the disk motor, because of its special mechanical structure, it belongs to the motor end bearing-free design, i.e. the rotor and stator are not fixed before installation, in order to ensure the precision, the magnetic ring and reading head of the encoder will be pre-installed on the motor during transportation. Influenced by the working mode of the encoder, the gap between the reading head and the gear teeth of the magnetic ring is very close, so that the stator and the rotor are easy to displace when the stator and the rotor are subjected to external force in the vertical direction in the transportation process, the magnetic ring collides with the reading head, the accuracy of the encoder is damaged, and the use of a motor is influenced.
Disclosure of Invention
The utility model aims to provide a disk type permanent magnet synchronous motor with reading head protection, which has the function of protecting an encoder so as to solve the problems.
The technical scheme adopted by the utility model is as follows:
the utility model provides a disk PMSM with reading head protection, includes rotor core, stator core, rotor shaft sleeve, casing and encoder, rotor core sets up on the rotor shaft sleeve, stator core sets up in the casing, the encoder includes magnetic ring, reading head and reading head mount pad, the magnetic ring sets up on the rotor shaft sleeve, the reading head is fixed on the reading head mount pad, the reading head mount pad sets up on stator core set up the reading head fender bracket between rotor shaft sleeve and the reading head mount pad, the reading head fender bracket props up the reading head mount pad and makes there is the clearance between reading head and the magnetic ring.
Further specifically, the reading head protection frame comprises an arc-shaped main body, the lower surface of the arc-shaped main body is an arc-shaped surface matched with the outer circle of the rotor shaft sleeve, and the reading head mounting seat abuts against the upper surface of the arc-shaped main body.
Further specifically, one side face of the reading head protection frame abuts against one end face of the magnetic ring, and the other side face of the reading head protection frame abuts against the stator iron core.
Further specifically, be provided with the first extension piece that outwards extends on the first side of arc main part, first extension piece is 1 piece at least, first extension piece supports and leans on an terminal surface of magnetic ring, first extension piece is in evenly distributed on the first side of arc main part.
Further specifically, the first extension block is 1, and the first extension block is disposed in the middle of the first side surface of the arc-shaped main body.
Further specifically, the second side of the arc-shaped main body is provided with second extending blocks extending outwards, the second extending blocks abut against the stator core, and the second extending blocks are uniformly distributed on the second side of the arc-shaped main body.
Further specifically, the second extension block and the first extension block are symmetrically distributed relative to the arc-shaped main body.
Further specifically, the readhead guard is made of plastic or aluminum.
Further specifically, a protective cover for preventing dust is further arranged on the reading head.
Further specifically, a brake disc mounting seat and an oil cylinder flange are arranged on the rotor shaft sleeve, and the brake disc mounting seat, the oil cylinder flange and the rotor shaft sleeve are integrally formed.
The utility model has the following beneficial effects:
according to the technical scheme provided by the utility model, the upper surface of the reading head protection frame is abutted against the bottom surface of the reading head mounting seat to generate a supporting force for the reading head, so that the reading head, the reading head mounting seat and the magnetic ring always keep a gap without relative displacement, and the gear teeth of the magnetic ring cannot impact the reading head, thereby effectively protecting an encoder. The side surface of the magnetic ring presses the extending block of the reading head protection frame, so that the overall friction force is increased, and the position of the protection frame is fixed. The reading head protection frame is simple in structure, low in cost and obvious in protection effect.
Drawings
FIG. 1 is an exploded view of a disk permanent magnet synchronous motor with read head protection;
FIG. 2 is a schematic view of a readhead guard;
FIG. 3 is a schematic structural diagram of a disk permanent magnet synchronous motor with read head protection;
FIG. 4 is an enlarged view at A in FIG. 3;
fig. 5 is a schematic structural diagram of a disk type permanent magnet synchronous motor with a reading head protection function when a reading head protection frame is not provided.
Wherein: 1-stator iron core, 2-rotor shaft sleeve, 3-shell, 4-magnetic ring, 5-reading head, 6-reading head mounting seat, 7-reading head protection frame, 71-arc main body, 72-extension block, 8-brake disc mounting seat, 9-oil cylinder flange, F1-first side face and F2-second side face.
Detailed Description
The present invention will be described in detail below with reference to specific embodiments shown in the drawings. These embodiments are not intended to limit the present invention, and structural, methodical, or functional changes that may be made by one of ordinary skill in the art in light of these embodiments are intended to be within the scope of the present invention.
If the utility model is described in terms of orientations (e.g., up, down, left, right, front, back, outside, inside, etc.), the orientation involved needs to be defined, for example, "for clarity of presentation of the positions and orientations described within the utility model, with reference to the operator of the instrument, the end proximal to the operator being the proximal end and the end distal to the operator being the distal end. "or" with reference to the paper surface "and" with reference to the motor axis "is defined. Of course, if the positional relationship between the two is defined by cross-reference at the time of the subsequent description, it may not be defined here.
In order to protect the encoder, the utility model provides a disk type permanent magnet synchronous motor provided with an encoder reading head protection frame 7.
The upper surface of the reading head protection frame 7 is defined as a surface on which the reading head protection frame 7 abuts against the reading head mounting base 6, and the lower surface of the reading head protection frame 7 is defined as a surface on which the reading head protection frame 7 abuts against the rotor shaft sleeve 2. Reference may be made specifically to "up" and "down" as noted in fig. 2.
The surface of the arc-shaped main body 71 close to the magnetic ring is defined as a first side surface F1, and the surface of the arc-shaped main body 71 close to the stator core 1 is defined as a second side surface F2. Reference may be made specifically to face "F1" and face "F2" labeled in fig. 2.
As shown in fig. 5, the conventional disc-type permanent magnet synchronous motor includes a main shaft, a rotor, a stator and an encoder, the rotor includes a rotor core and a rotor shaft sleeve 2, the rotor core is disposed on the rotor shaft sleeve 2, the main shaft is sleeved in the rotor shaft sleeve 2, the stator includes a stator core 1 and a housing 3, the stator core 1 is disposed in the housing 3, the encoder includes a magnetic ring 4, a reading head 5 and a reading head mounting seat 6, the reading head 5 is fixed on the reading head mounting seat 6, the reading head mounting seat 6 is disposed on the stator core 1, the magnetic ring 4 is disposed on the rotor shaft sleeve 2, since the rotor and the stator are fixed without bearings, the rotor can drive the magnetic ring 4 to rotate together, the magnetic ring 4 has magnetic ring gear teeth, a gap between the reading head 5 and the magnetic ring gear teeth is small, when the stator and the rotor are subjected to an external force in a vertical direction, a displacement may occur which may cause the read head 5 to collide with the teeth of the magnetic ring, thereby damaging the accuracy of the encoder.
As shown in fig. 1 and fig. 2, the disc-type permanent magnet synchronous motor with a reading head protection further includes a reading head protection frame 7, where the reading head protection frame 7 is disposed between the rotor shaft sleeve 2 and the reading head mounting base 6, and the reading head protection frame 7 supports the reading head mounting base 6 and enables a gap to exist between the reading head 5 and the magnetic ring 4.
In this embodiment, the reading head protection frame 7 is disposed on the rotor shaft sleeve 2 and is coaxial with the spindle of the disc-type permanent magnet synchronous motor, the reading head protection frame 7 includes an arc-shaped main body 71, the lower surface of the arc-shaped main body 71 is an arc-shaped surface matched with the outer circle of the rotor shaft sleeve 2, and the reading head mounting base 6 abuts against the upper surface of the arc-shaped main body 71, so that the magnetic ring gear teeth do not collide with the reading head 5 under the supporting action of the reading head protection frame 7.
Preferably, one side surface of the reading head protection frame 7 abuts against one end surface of the magnetic ring 4, and the other side surface of the reading head protection frame 7 abuts against the stator core 1. The read head protection bracket 7 is fixed by a pressure generated by the magnetic ring 4 and a supporting force generated by the stator core 1.
Preferably, the upper surface of the head guard 7 has an arc shape having the same arc shape as the lower surface thereof, that is, the entire head guard 7 has an approximately arc shape, which has a good supporting effect and is easy to be manufactured by opening a mold.
The readhead guard 7 is made of a high strength plastic having high impact toughness, high strength, high hardness, high temperature resistance, fatigue durability properties, such as the long glass fibre reinforced PP and PA series. In addition, aluminum may also be selected as a manufacturing material.
Preferably, the first side surface F1 of the arc-shaped main body 71 is provided with at least 1 outwardly extending first extending block 72, the first extending block 72 abuts against one end surface of the magnetic ring 4, and the first extending blocks 72 are uniformly distributed on the first side surface F1 of the arc-shaped main body 71. The distribution mode is favorable for uniform stress.
When the first extension piece 72 is 1 piece, it is disposed at the middle on the first side face F1 of the arc-shaped main body 71.
When the number of the first extension blocks 72 is not less than 2, the first extension blocks 72 are located on the same side of the arc-shaped main body 71, and the first extension blocks 72 are symmetrically distributed with respect to the symmetry axis of the arc on the first side surface F1 of the arc-shaped main body 71.
In addition, the second side F2 of the arc-shaped main body 71 may also be provided with at least 1 outwardly extending second extension block which abuts against the stator core 1, the second extension blocks being evenly distributed on the second side F2 of the arc-shaped main body 71.
When the second extension piece is 1 piece, it is disposed at the middle on the second side F2 of the arc-shaped main body 71.
When the number of the second extending blocks is not less than 2, the second extending blocks are positioned on the same side of the arc-shaped main body 71, and the second extending blocks are symmetrically distributed relative to the symmetrical axis of the arc on the second side surface F2 of the arc-shaped main body 71.
The second extension block and the first extension block 72 are symmetrically distributed relative to the arc-shaped main body 71.
The design of the extension block reduces the production cost of the readhead guard 7 while ensuring its support.
Fig. 2 shows an embodiment of the utility model.
The both ends of arc main part 71 are provided with two first extension pieces 72 that extend to outside, first extension piece 72 with arc main part 71 integrated casting shaping, the lower surface of the two is the same arc surface, read head fender bracket 7 wholly is the arc slice, can laminate rotor shaft sleeve 2's surface completely to difficult impaired, the security performance is good.
As shown in fig. 3 and 4, the working principle of the present invention is:
the reading head 5 and the reading head mounting seat 6 are integrally locked, after the reading head protection frame 7 is mounted, the upper surface of the reading head protection frame 7 is abutted against the bottom surface of the reading head mounting seat 6, the reading head protection frame 7 generates upward supporting force for the reading head mounting seat 6 to support the reading head mounting seat 6, so that the whole of the reading head 5 and the reading head mounting seat 6 and the magnetic ring 42 always keep a stable gap, and relative displacement does not occur, the gear teeth of the magnetic ring 4 cannot impact the reading head 5, so that the reading head 5 of the encoder is protected, and the accuracy of the encoder is ensured.
Meanwhile, one end face of the magnetic ring 4 presses the first extension block 72 of the reading head protection frame 7 to generate axial positive pressure on the reading head protection frame 7, so that the overall friction force is increased, and therefore, the pressure generated by the magnetic ring 4 and the supporting force provided by the stator iron core 1 play a role in fixing the position of the reading head protection frame 7, so that the reading head protection frame cannot slide off the rotor shaft sleeve 2. The design scheme does not need to adopt an additional fixing device for the reading head protection frame 7, saves the cost and is convenient to use.
The reading head 5 is also provided with a protective cover for protecting the encoder from dust. Currently, in use, the reading head 5 of the encoder may also rub against particulate dust or metal shavings in the production operation, causing damage to the reading head 5, thus ensuring the cleanliness of the encoder also protects the reading head 5.
The reading head protection frame 7 provided by the utility model has the advantages of simple structure, low cost, easiness in installation, manpower and material resources saving and obvious protection effect on the reading head 5 of the encoder.
In addition, be provided with brake disc mount pad 8 on the rotor shaft sleeve 2, brake disc mount pad 8 with rotor shaft sleeve 2 integrated into one piece. An oil cylinder flange 9 is arranged on the rotor shaft sleeve 2, and the oil cylinder flange 9 and the rotor shaft sleeve 2 are integrally formed. The other end face of the magnetic ring 4 abuts against the brake disc mounting seat 8. The integrated into one piece's design makes the installation of motor convenient and fast more.
It should be understood that although the present description refers to embodiments, not every embodiment includes only a single embodiment, and such description is for clarity only, and those skilled in the art will recognize that the embodiments as a whole may be appropriately combined to form other embodiments as would be understood by those skilled in the art.
The above-listed detailed description is only a specific description of a possible embodiment of the present invention, and they are not intended to limit the scope of the present invention, and equivalent embodiments or modifications made without departing from the technical spirit of the present invention should be included in the scope of the present invention.
Claims (10)
1. The utility model provides a disk PMSM with reading head protection, includes rotor core, stator core (1), rotor shaft sleeve (2), casing (3) and encoder, rotor core sets up on rotor shaft sleeve (2), stator core (1) sets up in casing (3), the encoder includes magnetic ring (4), reading head (5) and reading head mount pad (6), magnetic ring (4) set up on rotor shaft sleeve (2), reading head (5) are fixed on reading head mount pad (6), reading head mount pad (6) set up on stator core (1), its characterized in that:
a reading head protection frame is arranged between the rotor shaft sleeve (2) and the reading head mounting seat (6), and the reading head protection frame (7) supports the reading head mounting seat (6) and enables a gap to exist between the reading head (5) and the magnetic ring (4).
2. The disk permanent magnet synchronous machine with readhead protection of claim 1, wherein:
the reading head protection frame (7) comprises an arc-shaped main body (71), the lower surface of the arc-shaped main body (71) is an arc-shaped surface matched with the outer circle of the rotor shaft sleeve (2), and the reading head mounting seat (6) is abutted against the upper surface of the arc-shaped main body (71).
3. The disk permanent magnet synchronous machine with readhead protection of claim 2, wherein:
one side face of the reading head protection frame (7) abuts against one end face of the magnetic ring (4), and the other side face of the reading head protection frame (7) abuts against the stator iron core (1).
4. A disk permanent magnet synchronous machine with readhead protection according to claim 3, wherein:
the magnetic ring is characterized in that a first extending block (72) extending outwards is arranged on the first side face of the arc-shaped main body (71), the number of the first extending blocks (72) is at least 1, the first extending blocks (72) abut against one end face of the magnetic ring (4), and the first extending blocks (72) are evenly distributed on the first side face of the arc-shaped main body (71).
5. The disk permanent magnet synchronous machine with readhead protection of claim 4, wherein:
the first extension block (72) is 1, and the first extension block (72) is arranged in the middle of the first side face of the arc-shaped main body (71).
6. The disk permanent magnet synchronous machine with readhead protection of claim 4, wherein:
and second extending blocks extending outwards are arranged on the second side face of the arc-shaped main body (71), the second extending blocks abut against the stator core (1), and the second extending blocks are uniformly distributed on the second side face of the arc-shaped main body (71).
7. The disk permanent magnet synchronous machine with readhead protection of claim 6, wherein:
the second extension block and the first extension block (72) are symmetrically distributed relative to the arc-shaped main body (71).
8. The disk permanent magnet synchronous machine with readhead protection of claim 1, wherein:
the reading head protective frame (7) is made of plastic or aluminum.
9. The disc type permanent magnet synchronous motor with read head protection as claimed in claim 1, characterized in that:
and a dustproof protective cover is also arranged on the reading head (5).
10. The disk permanent magnet synchronous machine with readhead protection of claim 1, wherein:
the rotor shaft sleeve is characterized in that a brake disc mounting seat (8) and an oil cylinder flange (9) are arranged on the rotor shaft sleeve (2), and the brake disc mounting seat (8), the oil cylinder flange (9) and the rotor shaft sleeve (2) are integrally formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122793767.2U CN216699744U (en) | 2021-11-15 | 2021-11-15 | Disc type permanent magnet synchronous motor with reading head protection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122793767.2U CN216699744U (en) | 2021-11-15 | 2021-11-15 | Disc type permanent magnet synchronous motor with reading head protection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216699744U true CN216699744U (en) | 2022-06-07 |
Family
ID=81833011
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122793767.2U Active CN216699744U (en) | 2021-11-15 | 2021-11-15 | Disc type permanent magnet synchronous motor with reading head protection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216699744U (en) |
-
2021
- 2021-11-15 CN CN202122793767.2U patent/CN216699744U/en active Active
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