Jig for assembling permanent magnet to rotor

Abstract

The present invention relates to a jig device for attaching permanent magnets to the surface of a rotor. It guides the magnets to be attached in the correct position without interference from the magnetic force of magnets already attached to the rotor when attaching the permanent magnets, thereby achieving the effect of preventing safety accidents caused by magnets sticking together during the process of attaching magnets to the rotor.

Description

Technology Field

[0001] The present invention relates to a jig device for attaching a permanent magnet to the surface of a rotor. Background Technology

[0002] Generally, a synchronous motor refers to a motor that has the characteristic of having a constant rotor speed regardless of the load weight when operating normally, and consists of a stator that generates a rotating magnetic field and a rotor with magnetic poles.

[0003] In particular, among synchronous motors, permanent magnet synchronous motors use permanent magnets in the field. Compared to other motors, they have relatively high efficiency and the advantage of not requiring protection against field temperature rise because there is no temperature rise due to field losses.

[0004] Among such permanent magnet synchronous motors, a surface-mounted permanent magnet synchronous motor places permanent magnets on the outer circumference of a rotor core and generates an alternating current by rotating the rotor core within an armature coil.

[0005] Here, the rotor core can rotate at high speed as needed, but when the rotor core rotates at high speed, the permanent magnets placed on the outer surface of the rotor core may detach from the rotor core due to centrifugal force. If the permanent magnets detach from the rotor core, it becomes impossible to generate alternating current, and there is a problem of reduced manufacturing efficiency and inconvenience because the permanent magnets must be maintained frequently.

[0006] To solve this problem, permanent magnets are fixed to the rotor using bolts. However, since magnets already magnetized on the rotor possess strong magnetic force, attaching them to the rotor requires controlling the position of the magnets with a force greater than the magnetic force generated between the existing magnets and the magnets to be attached.

[0007] If the magnet is not securely fixed in a specific position without a separate device, there is a possibility of safety accidents occurring, such as the magnet sticking to an already attached magnet during the process of attaching it to the rotor.

[0008] Therefore, a separate device is required to overcome the magnetic force generated between permanent magnets and to guide the magnets to an accurate position. Prior art literature

[0009] Republic of Korea Registered Patent Publication No. 1242156 The problem to be solved

[0010] The present invention is proposed to solve the above problem and aims to provide a jig for assembling permanent magnets of a rotor that guides the magnets to be coupled in the correct position without interference from the magnetic force of the magnets already attached to the rotor when coupling the permanent magnets. means of solving the problem

[0011] A jig for assembling a rotor permanent magnet according to at least one embodiment of the present invention comprises: a main body; a plurality of guide pins provided in the main body; a transfer module that slides along the plurality of guide pins and fixes a permanent magnet on one side; and a stud bolt that is installed by penetrating the main body, has its end connected to the transfer module, and moves the transfer module by reciprocating axially by rotation.

[0012] In at least one embodiment of the present invention, the transfer module comprises: a guide portion that slides along the plurality of guide pins; and a permanent magnet fixing portion installed on one side of the guide portion and fixing a permanent magnet.

[0013] In at least one embodiment of the present invention, the guide portion comprises at least one fixing bolt that fixes the permanent magnet to the permanent magnet fixing portion.

[0014] In at least one embodiment of the present invention, the permanent magnet fixing part includes at least one vacuum adsorption part that contacts one side of the permanent magnet and fixes the permanent magnet.

[0015] In at least one embodiment of the present invention, the guide portion is formed with a stud bolt coupling portion to which the end of the stud bolt is rotatably coupled.

[0016] In at least one embodiment of the present invention, a bearing is provided between the stud bolt and the stud bolt joint.

[0017] In at least one embodiment of the present invention, the permanent magnet fixing part includes a non-magnetic material that does not stick to the magnet.

[0018] In at least one embodiment of the present invention, the guide pins are arranged alternately in a first direction on the main body. Effects of the invention

[0019] According to an embodiment of the present invention, when attaching permanent magnets, the magnets are guided to be attached in the correct position without interference from the magnetic force of magnets already attached to the rotor, thereby achieving the effect of preventing safety accidents caused by magnets sticking together during the process of attaching magnets to the rotor.

[0020] In addition, it achieves the effect of preventing the problem where the position changes due to magnetic force when magnets are attached, making coupling difficult. Brief explanation of the drawing

[0021] FIG. 1 is a drawing illustrating a jig for assembling a rotor permanent magnet according to at least one embodiment of the present invention. FIG. 2 is a drawing showing a disassembled view of a jig for assembling a rotor permanent magnet according to at least one embodiment of the present invention. FIG. 3 is a drawing showing the upper part of a jig for assembling a rotor permanent magnet according to at least one embodiment of the present invention. FIG. 4 is a drawing showing the guide portion of a jig for assembling a rotor permanent magnet according to at least one embodiment of the present invention moved toward the main body. FIG. 5 is a drawing showing a permanent magnet fixed to a magnet fixing part in a jig for assembling a rotor permanent magnet according to at least one embodiment of the present invention. FIG. 6 is a drawing showing the tip portion of a guide pin of a jig for assembling a rotor permanent magnet according to at least one embodiment of the present invention being coupled to a guide pin hole of a rotor. FIG. 7 is a drawing illustrating the movement of a permanent magnet toward the rotor as a stud bolt rotates while a jig for assembling a rotor permanent magnet according to at least one embodiment of the present invention is fixed to the rotor. FIG. 8 is a drawing illustrating a permanent magnet being seated on a rotor and a fixing bolt being separated while a jig for assembling a rotor permanent magnet according to at least one embodiment of the present invention is fixed to the rotor. Figure 9 is a drawing showing a permanent magnet coupled to a rotor. Specific details for implementing the invention

[0022] The present invention is described in detail below with reference to exemplary drawings. It should be noted that in assigning reference numerals to the components of each drawing, the same components are given the same reference numeral whenever possible, even if they are shown in different drawings.

[0023] In this specification, terms such as first, second, etc. may be used to describe various components, but the order, size, location, or importance of these components is not limited by terms such as first, second, etc., and are named solely for the purpose of distinguishing one component from another.

[0024] FIG. 1 is a drawing showing a jig for assembling a rotor permanent magnet according to at least one embodiment of the present invention, and FIG. 2 is a drawing showing the disassembled view of the jig for assembling a rotor permanent magnet according to at least one embodiment of the present invention.

[0025] A jig for assembling a rotor permanent magnet according to at least one embodiment of the present invention includes a main body (100), a guide pin (130), a transfer module (150), and a stud bolt (240), with reference to FIGS. 1 and 2.

[0026] The main body (100) has a stud hole (120) formed in the center to which a stud bolt (240), to be described later, is coupled, and on both sides of the stud hole (120), a coupling hole (110) to which a guide pin (130), to be described later, is coupled is formed.

[0027] A screw thread is formed on the inner surface of the stud hole (120).

[0028] One end of the guide pin (130) in the axial direction is installed in the coupling hole (110) formed in the main body (100).

[0029] A tip portion (140) is formed at the other end of the guide pin (130).

[0030] The guide pin is connected to a transfer module (150) to be described later and moves in the axial direction of the guide pin (130).

[0031] The guide pins (130) are arranged in an alternating manner in the first direction on the main body (100) as shown in FIG. 3.

[0032] Referring to FIG. 9, in order to maximize space utilization, a guide pin insertion hole (260) and a screw hole (270) are located on one side of the longitudinal end of the permanent magnet (250), and a screw hole (270) and a guide pin insertion hole (260) are located on the other side of the longitudinal end. Referring to FIG. 3, the guide pins coupled to the main body (100) can be positioned such that one of the two guide pins (130) is located on the right side of the main body (100) with the stud bolt (240) as the center, and the other is located on the left side with the stud bolt (240) as the center.

[0033] Referring again to FIGS. 1 and FIGS. 2, the transfer module (150) is slidably moved by a plurality of guide pins (130) and a permanent magnet (250) is fixed on one side.

[0034] The transfer module (150) includes a guide part (160) and a permanent magnet fixing part (230).

[0035] The guide section (160) is slidably moved by a plurality of guide pins (130).

[0036] The guide portion (160) has a plurality of through holes (170) formed so that guide pins can be inserted.

[0037] The guide portion (160) has a plurality of bolt holes (180) formed therein to which a fixing bolt, to be described later, is coupled. The bolt holes (180) are formed to penetrate in the same direction as the through holes (170), and the bolt holes (180) are formed spaced apart from the through holes (170) in the first direction.

[0038] The guide pin (130) is coupled to the through hole (170).

[0039] The guide portion (160) includes at least one fixing bolt (220) that fixes the permanent magnet (250) to the permanent magnet fixing portion (230).

[0040] The fixing bolt (220) passes through the aforementioned bolt hole (180) and is coupled to the screw hole (270) formed in the permanent magnet (250).

[0041] The guide portion (160) is formed with a stud bolt joint portion (190) to which the end of the stud bolt (240) is rotatably connected.

[0042] The stud bolt connection part (190) can be formed on the other side opposite to the one side to which the permanent magnet fixing part (230), which will be described later, is connected in the guide part (160).

[0043] A bearing (200) is provided between the stud bolt (240) and the stud bolt joint (190).

[0044] The bearing (200) achieves the effect of rotating smoothly when the stud bolt (240) is rotated. The end of the stud bolt (240) can be fixed by being pressed into the inner ring of the bearing (200). The stud bolt joint (190) can be fixed by being pressed into the outer ring of the bearing (200).

[0045] The stud bolt (240) is installed by penetrating the main body (100) and its end is connected to the guide part (160), and it reciprocates axially by rotation to move the transfer module (150) axially along the guide pin (130).

[0046] The stud bolt (240) has threads formed on its outer surface.

[0047] The permanent magnet fixing part (230) is installed on one side of the guide part (160) and fixes the permanent magnet (250).

[0048] The permanent magnet fixing part (230) may have a round shape on one side where the permanent magnet (250) is fixed.

[0049] According to the embodiment, the permanent magnet fixing part (230) may not be fixed by a fixing bolt (220) as mentioned above, but at least one vacuum adsorption part may be provided on one side of the permanent magnet fixing part (230).

[0050] The permanent magnet fixing part (230) includes a non-magnetic material that does not stick to the magnet.

[0051] The non-magnetic material may include, for example, at least one of aluminum and stainless steel materials.

[0052] In this embodiment, if the permanent magnet fixing part (230) is a magnetic material that adheres to the permanent magnet (250), the worker may be injured during the process of attaching the permanent magnet (250) to the permanent magnet fixing part (230), or the permanent magnet (250) may adhere before being placed in the correct position of the permanent magnet fixing part (230). Therefore, it may be preferable for the permanent magnet fixing part (230) to be a non-magnetic material that does not adhere to the magnet.

[0053] The guide part (160) and the permanent magnet fixing part (230) can be fixed through a plurality of screws (210).

[0054] Next, referring to FIGS. 4 to 8, the process of fixing a permanent magnet (250) to a rotor using a jig for assembling a rotor permanent magnet will be explained.

[0055] Referring to FIG. 4, the stud bolt (240) is rotated to move the guide portion (160) toward the main body portion (100). Depending on the shape of the screw thread, the stud can be rotated clockwise or counterclockwise.

[0056] Next, as shown in Fig. 5, a permanent magnet (250) is attached to a permanent magnet fixing part (230), and the permanent magnet (250) is fixed using a fixing bolt.

[0057] When the permanent magnet (250) is fixed to the permanent magnet fixing part (230), the tip part (140) of the guide pin (130) is coupled to the guide pin insertion hole (260) of the rotor as shown in FIG. 6.

[0058] When the tip portion (140) of the guide pin (130) is fixed in the guide pin insertion hole (260), the stud bolt (240) is rotated to move the guide portion (160) toward the rotor until the permanent magnet (250) is attached to the rotor as shown in FIG. 7.

[0059] When the permanent magnet (250) is attached, as shown in FIG. 8, the fixing bolt (220) is separated from the permanent magnet (250) to separate the jig for assembling the rotor permanent magnet, and the fastening bolt (280) is connected to the tab for the fastening bolt (280) formed on the permanent magnet (250) to fix the magnet to the rotor.

[0060] For example, the embodiments described and illustrated above may be combined with one another, and each embodiment may optionally adopt or replace some components of other embodiments as needed.

[0061] Accordingly, the embodiments disclosed in this specification and drawings are intended to illustrate, not limit, the technical concept of the present invention, and the scope of the technical concept of the present invention is not limited by these embodiments. The scope of protection of the present invention shall be interpreted by the claims below, and all technical concepts within an equivalent scope shall be interpreted as being included within the scope of rights of the present invention. Explanation of the symbols

[0062] 100: Main body 110: Connection hole 120: Stud hole 130: Guide pin 140: Tip 150: Transfer Module 160: Guide Section 170: Through hole 180: Bolt hole 190: Stud bolt joint 200: Bearing 210: Screw 220: Fixing bolt 230: Permanent magnet fixing part 240: Stud bolt 250: Permanent magnet 260: Guide pin insertion hole 270: Screw hole 280: Fastening bolt

Claims

Claim 1 A jig for assembling a rotor permanent magnet, comprising: a main body; a plurality of guide pins provided in the main body; a transfer module that slides along the plurality of guide pins and fixes a permanent magnet on one side; and a stud bolt that is installed through the main body, has its end connected to the transfer module, and moves the transfer module by reciprocating axially by rotation. Claim 2 A jig for assembling a rotor permanent magnet, wherein the transfer module comprises: a guide part that slides along the plurality of guide pins; and a permanent magnet fixing part installed on one side of the guide part and fixing a permanent magnet. Claim 3 A jig for assembling a rotor permanent magnet, wherein the guide portion comprises at least one fixing bolt for fixing the permanent magnet to the permanent magnet fixing portion in paragraph 2. Claim 4 A jig for assembling a rotor permanent magnet, wherein the permanent magnet fixing part comprises at least one vacuum adsorption part that contacts one side of the permanent magnet to fix the permanent magnet. Claim 5 In paragraph 2, the guide portion is a jig for assembling a rotor permanent magnet, wherein a stud bolt coupling portion is formed to which the end of the stud bolt is rotatably coupled. Claim 6 In claim 5, a jig for assembling a rotor permanent magnet, wherein a bearing is provided between the stud bolt and the stud bolt joint. Claim 7 In paragraph 2, the above-mentioned permanent magnet fixing part comprises a non-magnetic material that does not stick to the magnet, a jig for assembling a rotor permanent magnet. Claim 8 In claim 1, the guide pins are arranged staggered from each other in a first direction in the main body part, forming a jig for assembling rotor permanent magnets.

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