TWM520205U - Magnet fixing device of shaft - Google Patents

Description

Rotary magnet fixing device

The invention relates to a rotating shaft of a heuristic motor applied to a drone or a remote control aircraft, in particular to a magnet fixing device for a rotating shaft.

In the magnet fixing method of the existing motor shaft, a plurality of magnets are usually circumferentially coupled to the outer periphery of the stacked silicon steel sheets at equal intervals, and the magnet and the silicon steel sheet group are coated and fixed by the outer casing. For the existing magnet fixing structure, refer to TW M329289 "Magnetic magnet and galvanized steel fixed structure", TW M378567 "Motor magnet fixed structure" and TW M510570 "Displaced rotor and its misaligned rotor magnet positioning set" The patent documents such as the ring are shown.

The existing motor shaft is arranged around a plurality of magnets around the silicon steel sheet group. Such a structural design not only constitutes a large number of components, has a complicated structure, and is time-consuming to assemble, and because the weight of the silicon steel sheet group is heavy and bulky, it is lightly stressed. For products such as small and small-sized unmanned aerial vehicles or remote-controlled aircraft, the existing magnet fixing method has become a major limitation of product design, and it is necessary to actively develop a magnet fixing device suitable for an inspiring machine of a drone or a remote control aircraft.

In order to solve the problem that the magnet fixing structure of the existing motor shaft has a complicated structure, heavy weight and large volume, the present invention proposes a magnet fixing device capable of simplifying the structure, reducing the weight and reducing the volume of the rotating shaft, and effectively solving the magnet fixing structure of the existing rotating shaft. Various issues.

The present invention solves the technical problem of the magnet fixing device for a rotating shaft, comprising: a mandrel comprising a core rod having a long straight shape and a non-circular cross section; a plurality of magnets each having a magnet at each of the axial centers a non-circular core hole having a shape and a size matched with the core rod, wherein each of the magnets is sleeved and laminated to the core rod; and a shaft tube is a hollow tube body having a length greater than the mandrel and two Forming a driving end and a supporting end respectively, forming a tube groove for matching the mandrel and the magnets in the inner portion of the shaft tube; a driving head, the two ends of which form a connecting seat and a driving shaft respectively The connecting seat of the driving head is coupled to the driving end of the shaft tube and is coupled to the mandrel in a non-rotatable manner; and a supporting head has a connecting seat and a shaft respectively formed at both ends thereof, the supporting head The connecting seat is connected to the support end of the shaft tube.

The magnet fixing device of the rotating shaft, wherein the mandrel further comprises a resisting block disposed at a rear end of the core rod, and the magnet located at the rear end is positioned against the abutting block.

The magnet fixing device of the rotating shaft, wherein the length of the core rod is greater than the length of each of the stacked magnets, such that the front end of the core rod protrudes and is coupled to the driving head in a non-rotatable manner.

The magnet fixing device of the rotating shaft, wherein the core rod is provided with a fixing screw hole at each of the axial ends of the two ends, and the driving head and the supporting head are provided with a shaft hole at the axial center, and Each of the fixing screws passes through the shaft hole and is screwed to the corresponding fixing screw hole.

The magnet fixing device of the rotating shaft, wherein the driving end of the shaft tube is provided with an insertion hole having an inner diameter smaller than the tube groove, and the driving head is correspondingly provided with a matching block embedded in the insertion hole, The insert is provided with a slot having a gauge shape conforming to the core rod, and a front end of the core rod is inserted into the slot.

The magnet fixing device of the rotating shaft, wherein the driving end of the shaft tube is circumferentially provided with a plurality of screw holes, the connecting seat of the driving head is correspondingly provided with a plurality of perforations, and the plurality of bolts respectively pass through the perforations And threaded to the corresponding screw holes.

The magnet fixing device of the rotating shaft, wherein the supporting head is provided with a matching block embedded in the pipe groove.

Compared with the prior art, the present invention combines a plurality of magnets on a mandrel and is assembled in a tube groove of a shaft tube, thereby effectively omitting the silicon steel sheet set and the magnet fixing structure of the existing motor shaft, thereby achieving a simplified structure and weight reduction. And the reduction of volume and other functions, it is very suitable for products such as light-duty and small-sized drones or remote-controlled aircraft inspirational motors, which are of great industrial value.

A preferred embodiment of the magnet fixing device of the present invention is shown in FIG. 1 to FIG. 4, which includes a mandrel 10, a plurality of magnets 20 stacked on the mandrel 10, and a set placed on the mandrel. 10 and a shaft tube 30 outside the magnet 20 and a driving head 40 and a supporting head 50 respectively disposed at both ends of the shaft tube 30.

As shown in FIG. 2 and FIG. 3, the mandrel 10 is a one-piece member made of a rigid metal material and includes a long straight core rod 11 and a resisting block 12 at the rear end of the core rod 11. And a fixed screw hole 13 and 14 having internal threads are respectively arranged at the axial centers of the two ends of the core rod 11; wherein the core rod 11 is a rigid rod member having a non-circular cross section, which may be a polygonal shape or a semicircle Various embodiments, such as a shape, an ellipse, and the like, in a preferred embodiment as shown, a non-circular shape is formed on each side of the core rod 11 symmetrically with a flattened card surface 111; The abutting block 12 is an annular plate having an outer diameter larger than the core rod 11 for positioning the magnet 20, and in the preferred embodiment as shown, the abutting block 12 is set to a circular plate. . In addition, the present invention can also omit the resisting block 12 and directly abut the magnet 20 with the support head 50.

Each of the magnets 20 is provided with a core hole 21 having a shape and a size matched with the core rod 11 in the axial center, and each of the magnets 20 is sleeved on the core rod 11 with each core hole 21, and the non-circular shape is used. The sleeve design of the core rod 11 and the core hole 21 enables the magnets 20 to be superposed on the core rod 11 in a manner that does not rotate relative to each other, so as to avoid mutual attraction of the magnets 20 due to the N-level and the S-level. With any rotation, the length of the core rod 11 of the present invention is greater than the length of the stacked magnets 20 such that the front end of the core rod 11 protrudes from the magnet 20 at the front end, and the magnet 20 at the rear end abuts Positioned in the abutment block 12; in the preferred embodiment as shown, the present invention is provided with five magnets 20 in the shape of a circular block, the outer diameter of each magnet 20 and the outer portion of the abutment block 12. The diameters of the core holes 21 are symmetrically arranged on each side of each of the two sides to form a non-circular shape.

The shaft tube 30 is a hollow circular tube having a length larger than the mandrel 10. The two ends of the shaft tube 30 respectively form a driving end 32 and a supporting end 33, and a circular tube groove having an open end is formed inside. 31, the inner diameter of the tube groove 31 is matched with the outer diameter of each magnet 20 and the outer diameter of the abutting block 12, so that the mandrel 10 and each of the magnets 20 can be matched and inserted into the tube groove 31; The annular end surface of the driving end 32 is provided with a plurality of screw holes 321 at equal intervals. In the preferred embodiment, the driving end 32 is provided with 10 screw holes 321 at intervals. And the driving end 32 is provided with an insertion hole 34 having an inner diameter smaller than the inner diameter of the tube groove 31, so that the position of the connection between the tube groove 31 and the insertion hole 34 forms an annular step ring flange 35, giving way The magnet 20 at the front end can be positioned against the ring abutment 35.

As shown in FIG. 1 to FIG. 3, the driving head 40 is provided with a connecting base 41 corresponding to the driving end 32 of the shaft tube 30 and a driving shaft 42 for outputting power; wherein the connecting seat 41 is external a circular seat body having a diameter corresponding to the outer diameter of the shaft tube 30, and corresponding to the screw holes 321 of the driving end 32, a plurality of through holes 411 are equally spaced around the connecting seat 41, and a plurality of bolts can be utilized. The driving head 40 is locked and coupled to the driving end 32 of the shaft tube 30 so as to pass through the through holes 411 and is screwed to the screw holes 321 . As shown in FIG. 2 and FIG. 4 , the driving head 40 integrally protrudes from the connecting base 41 with a fitting 44 matching the insertion hole 34 , and the insert 44 is recessed with a front end of the core rod 11 . The matching slot 45 allows the front end of the core rod 11 to be positioned and positioned in the slot 45 without any rotation; a shaft hole 46 is formed in the axial center of the driving head 40, and a fixing screw 47 can be worn. The drive head 40 is assembled and fixed to the mandrel 10 via the shaft hole 46 and a fixing screw hole 13 that is screwed to the front end of the mandrel 10.

As shown in FIG. 1 to FIG. 3, the support head 50 is provided with a coupling seat 51 corresponding to the support end 33 of the shaft tube 30 and a support shaft 52 at the rear end. The coupling seat 51 has an outer diameter and the shaft. A circular seat body having an outer diameter of the tube 30 is defined, and an insert 53 matching the tube groove 31 is integrally formed on the connecting seat 51, and a shaft hole 54 is formed in the axial center of the support head 50. The support head 50 is assembled and fixed with the mandrel 10 by a fixing screw 55 passing through the shaft hole 54 and screwed to the fixing screw hole 14 at the rear end of the mandrel 10. The group structure is as shown in FIG. 1 and FIG. The motor shaft shown in 3.

In the preferred embodiment, the driving head 40 and the shaft tube 30 and the supporting head 50 and the shaft tube 30 are assembled in an assembled manner, but the driving head 40 or the same can be used in the present invention. One of the support heads 50 is configured to be integrally formed with the shaft tube 30. The main technical feature of the present patent application is the fixed configuration of each magnet 20 for the drive head 40 or the support head 50 and the The manner in which the shaft tube 30 is connected is not particularly limited.

Referring to FIG. 1 to FIG. 3 , the present invention directly superimposes a plurality of the magnets 20 in a non-rotatable manner on the mandrel 10 , and then fits together in the tube groove 31 of the shaft tube 30 . The driving head 40 and the supporting head 50 at both ends of the shaft tube 30 effectively form an innovative rotating shaft magnet fixing device in a compact structure. Compared with the existing magnet fixing structure, the present invention effectively omits the silicon steel sheet group and The fixed structure of the silicon steel sheet group and a plurality of magnets, the novel model has the advantages of simplifying the structure, reducing the weight and reducing the volume, and is very suitable for products such as a light-weight and small-sized drone or remote-controlled aircraft.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way. Any person having ordinary knowledge in the art can use the present invention without departing from the technical features of the present invention. Equivalent embodiments of the novel modifications or modifications made by the novel teachings are still within the scope of the novel features.

10‧‧‧ mandrel
11‧‧‧core rod
111‧‧‧Car face
12‧‧‧
13, 14‧‧‧ Fixed screw holes
20‧‧‧ Magnet
21‧‧‧ core hole
211‧‧‧Car face
30‧‧‧ shaft tube
31‧‧‧ tube slot
32‧‧‧Driver
321‧‧‧ screw hole
33‧‧‧Support side
34‧‧‧Inlay
35‧‧‧ Rings
40‧‧‧ drive head
41‧‧‧Connecting Block
411‧‧‧Perforation
42‧‧‧ drive shaft
43‧‧‧Bolts
44‧‧‧Block
45‧‧‧Slots
46‧‧‧ shaft hole
47‧‧‧ fixing screws
50‧‧‧Support head
51‧‧‧ link
52‧‧‧ Support shaft
53‧‧‧Block
54‧‧‧Axis hole
55‧‧‧ fixing screws

1 is a perspective view of a preferred embodiment of the present invention. Figure 2 is an exploded view of the components of the preferred embodiment of the present invention. Figure 3 is a combined cross-sectional view of a preferred embodiment of the present invention. Figure 4 is a partial cross-sectional view of the preferred embodiment of the present invention.

10‧‧‧ mandrel

11‧‧‧core rod

111‧‧‧Car face

12‧‧‧

13, 14‧‧‧ Fixed screw holes

20‧‧‧ Magnet

21‧‧‧ core hole

211‧‧‧Car face

30‧‧‧ shaft tube

31‧‧‧ tube slot

32‧‧‧Driver

321‧‧‧ screw hole

33‧‧‧Support side

34‧‧‧Inlay

35‧‧‧ Rings

40‧‧‧ drive head

41‧‧‧Connecting Block

411‧‧‧Perforation

42‧‧‧ drive shaft

43‧‧‧Bolts

44‧‧‧Block

45‧‧‧Slots

47‧‧‧ fixing screws

50‧‧‧Support head

51‧‧‧ link

52‧‧‧ Support shaft

53‧‧‧Block

54‧‧‧Axis hole

55‧‧‧ fixing screws

Claims (10)

A magnet fixing device for a rotating shaft, comprising: a mandrel comprising a core rod having a long straight shape and a non-circular cross section; a plurality of magnets each having a shape and a specification and a core rod at an axial center a matching non-circular core hole, each magnet is sleeved and assembled to the core rod by a core hole; a shaft tube is a hollow tube body having a length greater than the mandrel and a driving end is respectively formed at both ends thereof a support end, a tube groove is formed in the shaft tube for the mandrel and the magnets to be matched and inserted; a driving head has a connecting seat and a driving shaft at both ends thereof, and the connecting seat of the driving head The connecting end is disposed on the driving end of the shaft tube and is coupled to the mandrel in a non-rotatable manner; and a supporting head has a connecting seat and a shaft respectively formed at both ends thereof, and the connecting base of the supporting head is connected and disposed The support end of the shaft tube. The magnet fixing device of the rotating shaft according to claim 1, wherein the mandrel further comprises a resisting block disposed at a rear end of the core rod, and the magnet located at the rear end is positioned against the abutting block. The magnet fixing device of the rotating shaft according to claim 2, wherein the core rod and the core hole of the magnet are matched with each other on a bilaterally symmetric side. The magnet fixing device of the rotating shaft according to claim 3, wherein the length of the core rod is greater than the length of each of the stacked magnets, such that the front end of the core rod protrudes and is coupled to the driving in a non-rotatable manner. head. A magnet fixing device for a rotating shaft according to claim 4, which comprises five magnets in the form of a circular block. The magnet fixing device of the rotating shaft according to any one of claims 1 to 5, wherein the core rod is provided with a fixing screw hole at each of the axial ends of the two ends, and the driving head and the supporting head are The shaft center is provided with a shaft hole, and each of the shaft screws passes through the shaft hole and is screwed to the corresponding fixing screw hole. The magnet fixing device of the shaft according to claim 6, wherein the driving end of the shaft tube is provided with an insertion hole having an inner diameter smaller than the tube groove, and the driving head is correspondingly provided with a matching embedded in the insertion hole. The insert is provided with a slot having a shape corresponding to the core rod, and a front end of the core rod is inserted into the slot. The magnet fixing device of the shaft according to claim 7, wherein the driving end of the shaft tube is circumferentially provided with a plurality of screw holes, and the connecting seat of the driving head is correspondingly provided with a plurality of perforations, and the plurality of bolts are respectively Through the perforations and threaded to the corresponding screw holes. A magnet fixing device for a spindle according to claim 8, wherein the support head is provided with a fitting that is fitted to the tube groove. The magnet fixing device of the rotating shaft according to claim 1 or 2, wherein the length of the core rod is greater than the length of each of the stacked magnets, such that the front end of the core rod protrudes and is engaged in the non-rotatable rotation manner Drive head.