Permanent magnet synchronous motor rotor structure

Abstract

The utility model belongs to the technical field of permanent magnet synchronous motors, and particularly relates to a permanent magnet synchronous motor rotor structure, which comprises an iron core, a rotating shaft assembly arranged in the middle in the iron core, a hollow-out groove arranged on one side of the rotating shaft assembly of the iron core, a magnet groove arranged on one side of the hollow-out groove of the iron core, and a permanent magnet arranged in the magnet groove. Glue is arranged on one side of the permanent magnet. Through mutual cooperation of the hollow grooves, the magnet grooves, the permanent magnets, the glue and the magnetic isolation grooves, the use amount of the permanent magnets is reduced, the structure is simple, the manufacturing difficulty is low, the problem of high manufacturing cost of the motor is avoided, and the service life of the motor is prolonged. Through mutual cooperation of the mounting block, the sealing gasket, the first connecting hole, the spline shaft sleeve, the mounting groove, the second connecting hole, the connecting rod, the forward thread, the forward locking nut, the reverse thread and the reverse locking nut, the rotating shaft and the output spline are detachably arranged, and the problem that the whole rotor needs to be replaced once the output spline loses efficacy due to abrasion is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to permanent magnet synchronous motor technical field, concretely is a kind of permanent magnet synchronous motor rotor structure. BACKGROUND

[0002] Motor is indispensable power element in industrialized society, permanent magnet synchronous motor technology is mature, and reliability is high, it is a kind of high efficiency high energy density environmental protection low carbon motor, winding is absent on rotor, simple structure, reliable operation, suitable for high speed operation and harsh working environment, therefore obtained various applications, such as aerospace, automobile industry and wind power generation etc., in recent years, due to rotor speed regulation range wide, torque density high and simple structure etc., make the advantage of permanent magnet synchronous motor increasingly prominent;

[0003] The rotor structure of the permanent magnet synchronous motor disclosed in the existing announcement No.CN114400805B comprises: a rotating shaft, the rotating shaft rotates around an axis; a rotor core, the rotor core is sleeved on the outer side of the rotating shaft; a permanent magnet group, the permanent magnet group is arranged on the outer side of the rotor core; a filler, the filler is arranged on the outer side of the rotor core, and an inclined groove is formed between the filler and the permanent magnet group; and a composite sheath, the composite sheath is sleeved on the outer side of the permanent magnet group and the filler, and the composite sheath comprises: a heat-conducting layer, the heat-conducting layer wraps the permanent magnet group and the filler; and a sheath ring, the sheath ring is spacedly wrapped on the outer side of the heat-conducting layer in the axial direction. The present application mainly solves the problem of difficult heat dissipation of the traditional permanent magnet synchronous motor rotor.

[0004] The existing technology has the following problems:

[0005] 1. The existing permanent magnet synchronous motor rotor structure contains a large amount of permanent magnet material on the rotor, which directly leads to high manufacturing cost of the motor, increases the production cost, and cannot meet the use requirements.

[0006] 2. The existing permanent magnet synchronous motor rotor structure generally has an output spline formed on the rotating shaft to output the torque of the motor, but since the rotating shaft and the output spline are integrally arranged, they cannot be disassembled, which also leads to the fact that the rotor needs to be replaced as a whole if the output spline is worn out during long-term use, so that the maintenance period and cost are quite high, and the practicability is poor. UTILITY MODEL CONTENTS

[0007] In view of the deficiencies of the prior art, the utility model provides a permanent magnet synchronous motor rotor structure, which solves the problems that the rotor contains a large amount of permanent magnet material, which directly leads to high manufacturing cost of the motor, and the rotating shaft and the output spline are integrally arranged and cannot be disassembled, which also leads to the fact that the rotor needs to be replaced as a whole if the output spline is worn out during long-term use, so that the maintenance period and cost are quite high.

[0008] In order to achieve the above object, the utility model provides the following technical scheme: A permanent magnet synchronous motor rotor structure, including the iron core, the iron core inside middle is provided with the rotating shaft subassembly, the iron core is located rotating shaft subassembly one side and is provided with the open -back groove, the iron core is located open -back groove one side and is provided with the magnet slot, the magnet slot is provided with permanent magnet in the inside, permanent magnet one side is provided with the glue, the iron core one side is provided with the magnetic separation slot.

[0009] As a preferred technical scheme of the utility model, the rotating shaft subassembly includes rotating shaft main part, the rotating shaft main part top is provided with the mounting block, the mounting block outer surface is provided with the sealing gasket, the mounting block one side is provided with the first connecting hole, the sealing gasket outer surface is provided with the spline shaft sleeve, the spline shaft sleeve bottom is provided with the installation slot, the spline shaft sleeve one side below is provided with the second connecting hole, the second connecting hole is provided with the connecting rod in the inside, the connecting rod outer surface one side is provided with the positive thread, the connecting rod is located the positive thread outer surface and is provided with the positive locking nut, the connecting rod outer surface other side is provided with the reverse thread, the connecting rod is located the reverse thread outer surface and is provided with the reverse locking nut.

[0010] As a preferred technical scheme of the utility model, the sealing gasket is installed on the mounting block through adhesion, the size of the mounting block is matched with the size of the installation slot, and the mounting block and the rotating shaft main part are integrally arranged.

[0011] As a preferred technical scheme of the utility model, the position of the first connecting hole and the position of the second connecting hole are correspondingly arranged, and the size of the first connecting hole, the size of the second connecting hole and the size of the connecting rod are matched.

[0012] As a preferred technical scheme of the utility model, the positive thread and the reverse thread are integrally arranged with the connecting rod, and the size of the positive locking nut and the size of the reverse locking nut are matched with the size of the positive thread and the size of the reverse thread respectively.

[0013] As a preferred technical scheme of the utility model, the size of the magnet slot is matched with the size of the permanent magnet, the permanent magnet is integrally arranged in an arc shape, the number of the permanent magnets is four groups, and the four groups of permanent magnets are arranged in a ring array.

[0014] As a preferred technical scheme of the utility model, the glue is specifically made of non-magnetic material, and the position of the glue is correspondingly arranged with the position of the magnetic separation slot.

[0015] Compared with the prior art, the utility model provides a permanent magnet synchronous motor rotor structure, which has the following beneficial effects:

[0016] 1. The permanent magnet synchronous motor rotor structure, through the setting hollow slot, magnet slot, permanent magnet, glue and magnetic separation slot, in use, first through the setting several groups of hollow slot reduces the weight of the rotor, then through the permanent magnet fixed in the magnet slot whole arc shape setting, makes the magnetic property utilization rate of permanent magnet enhances, and can thin the thickness of permanent magnet, reaches the purpose of reducing its material, then through the core on the setting magnetic separation slot, and cooperates the glue of permanent magnet two ends non-magnetic material, makes the magnetic flux of permanent magnet difficult to short circuit, further improves the utilization rate of permanent magnet, finally the magnetic separation slot can still increase the heat dissipation area of the core, prevents the permanent magnet from causing the magnetic property reduction due to high temperature, this design, reduces the use amount of permanent magnet, and simple structure, low manufacturing difficulty, avoids the problem of high cost of motor manufacturing, reduces the cost of production, meets the use requirement.

[0017] 2. The permanent magnet synchronous motor rotor structure, through the setting mounting block, sealing gasket, first connecting hole, spline shaft sleeve, mounting groove, second connecting hole, connecting rod, forward thread, forward locking nut, reverse thread and reverse locking nut, when installing the spline shaft sleeve, first push its mounting groove and the mounting block on the shaft body embed, and through the setting sealing gasket, the connection of mounting groove and mounting block is reinforced, then through the connecting rod embeds first connecting hole and second connecting hole, and through forward locking nut and reverse locking nut respectively with the forward thread and reverse thread on the connecting rod is screwed, forms the interlocking structure, further strengthens the firm stability of the connection between spline shaft sleeve and shaft body, makes its connecting place not easy to fall off or looseness, this design, makes the shaft and output spline be detachable, avoids the problem that once the output spline wears out, the whole rotor needs to be replaced, and the practicality is stronger. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is whole structure schematic diagram of the utility model;

[0019] Figure 2 It is three-dimensional structure schematic diagram of the utility model shaft body;

[0020] Figure 3 It is three-dimensional structure schematic diagram of the utility model spline shaft sleeve;

[0021] Figure 4 It is three-dimensional structure schematic diagram of the utility model connecting rod.

[0022] In the figure: 1, iron core; 2, rotating shaft assembly; 201, rotating shaft body; 202, mounting block; 203, sealing gasket; 204, first connecting hole; 205, spline shaft sleeve; 206, mounting groove; 207, second connecting hole; 208, connecting rod; 209, forward thread; 2010, forward locking nut; 2011, reverse thread; 2012, reverse locking nut; 3, hollow groove; 4, magnet slot; 5, permanent magnet; 6, glue; 7, magnetic separation groove. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0024] With reference to Figure 1 and Figure 2 , the utility model provides an embodiment: a kind of permanent magnet synchronous motor rotor structure, including iron core 1, rotating shaft assembly 2 is arranged in the middle of iron core 1 inside, hollow groove 3 is set in the one side of rotating shaft assembly 2 of iron core 1, magnet slot 4 is set in the one side of hollow groove 3 of iron core 1, permanent magnet 5 is arranged in magnet slot 4, glue 6 is arranged in the one side of permanent magnet 5, magnetic separation groove 7 is set in the one side of iron core 1;The size of magnet slot 4 is compatible with the size of permanent magnet 5, permanent magnet 5 is overall arranged in arc shape, the number of permanent magnet 5 is four groups, four groups of permanent magnet 5 are arranged in annular array arrangement;

[0025] Specifically: it is overall arranged in arc shape by permanent magnet 5 fixed in magnet slot 4, so that the magnetic property utilization rate of permanent magnet 5 is enhanced, and the thickness of permanent magnet 5 can be reduced, to achieve the purpose of reducing its material.

[0026] With reference to Figure 2 , Figure 3 and Figure 4The rotating shaft assembly 2 comprises a rotating shaft body 201, the top end of the rotating shaft body 201 is provided with a mounting block 202, the outer surface of the mounting block 202 is provided with a sealing gasket 203, the side of the mounting block 202 is provided with a first connecting hole 204, the outer surface of the sealing gasket 203 is provided with a spline shaft sleeve 205, the bottom of the spline shaft sleeve 205 is provided with a mounting groove 206, the side of the spline shaft sleeve 205 is provided with a second connecting hole 207 below, the second connecting hole 207 is provided with a connecting rod 208 inside, the outer surface of the connecting rod 208 is provided with a forward thread 209 on one side, the connecting rod 208 is provided with a forward locking nut 2010 on the outer surface of the forward thread 209, the outer surface of the connecting rod 208 is provided with a reverse thread 2011 on the other side, and the connecting rod 208 is provided with a reverse locking nut 2012 on the outer surface of the reverse thread 2011; the sealing gasket 203 is mounted on the mounting block 202 through adhesive connection, the size of the mounting block 202 is matched with the size of the mounting groove 206, and the mounting block 202 is integrally arranged with the rotating shaft body 201;

[0027] Specifically, the sealing gasket 203 is arranged to reinforce the connection between the mounting groove 206 and the mounting block 202.

[0028] Referring to Figure 2 , Figure 3 and Figure 4 , the positions of the first connecting hole 204 and the second connecting hole 207 are correspondingly arranged, the sizes of the first connecting hole 204 and the second connecting hole 207 are matched with the size of the connecting rod 208; the forward thread 209 and the reverse thread 2011 are integrally arranged with the connecting rod 208, and the sizes of the forward locking nut 2010 and the reverse locking nut 2012 are matched with the sizes of the forward thread 209 and the reverse thread 2011 respectively;

[0029] Specifically, the first connecting hole 204 and the second connecting hole 207 are embedded through the connecting rod 208, and the forward locking nut 2010 and the reverse locking nut 2012 are respectively screwed with the forward thread 209 and the reverse thread 2011 on the connecting rod 208 to form an interlocking structure, thereby further strengthening the firmness and stability of the connection between the spline shaft sleeve 205 and the rotating shaft body 201, so that the connection position is not easy to fall off or loosen.

[0030] Referring to Figure 1 and Figure 2 , the glue 6 is specifically made of a non-magnetic material, and the position of the glue 6 is correspondingly arranged with the position of the magnetic isolation groove 7;

[0031] Specifically: facilitate the setting of the magnetic slot 7, and cooperate with the permanent magnet 5 both ends of the non-magnetic material glue 6, so that the magnetic flux of permanent magnet 5 is difficult to short circuit, further improve the utilization of permanent magnet 5, finally the magnetic slot 7 can also increase the heat dissipation area of the core 1, prevent the permanent magnet 5 due to high temperature caused by magnetic reduction.

[0032] The working principle and use process of the utility model: in use, first through the hollow groove 3 set on the core 1 of several groups reduces the weight of the rotor, then through the permanent magnet 5 fixed in the magnet slot 4 is arc-shaped, so that the magnetic utilization of permanent magnet 5 is enhanced, and the thickness of permanent magnet 5 can be thinned, the purpose of reducing the material is achieved, then through the magnetic slot 7 set on the core 1, and cooperate with the non-magnetic material glue 6 of both ends of permanent magnet 5, so that the magnetic flux of permanent magnet 5 is difficult to short circuit, further improve the utilization of permanent magnet 5, finally the magnetic slot 7 can also increase the heat dissipation area of the core 1, prevent the permanent magnet 5 due to high temperature caused by magnetic reduction;

[0033] When installing the spline shaft sleeve 205, first push its installation groove 206 and the installation block 202 on the shaft body 201 embedded, and through the sealing pad 203 set in the shaft assembly 2, the connection of installation groove 206 and installation block 202 is reinforced, then through the connecting rod 208 embedded first connecting hole 204 on the installation block 202 and second connecting hole 207 on the spline shaft sleeve 205, at the same time through the forward locking nut 2010 and reverse locking nut 2012 respectively with the forward thread 209 and reverse thread 2011 on the connecting rod 208 are screwed, form the interlocking structure, further strengthen the firm stability of the connection between spline shaft sleeve 205 and shaft body 201, so that its connection is not easy to fall off or loose.

[0034] Finally, it should be noted that: the above only for preferred embodiments of the utility model and does not limit the utility model, although the utility model has been described in detail with reference to the foregoing embodiments, for those skilled in the art, it still can modify the technical scheme recorded in the foregoing embodiments, or make equivalent replacement to part of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. A permanent magnet synchronous motor rotor structure comprising a core (1), characterized in that: The iron core (1) is internally provided with a rotating shaft assembly (2), the iron core (1) is provided with a hollow groove (3) on one side of the rotating shaft assembly (2), the iron core (1) is provided with a magnet slot (4) on one side of the hollow groove (3), the magnet slot (4) is internally provided with a permanent magnet (5), one side of the permanent magnet (5) is provided with glue (6), one side of the iron core (1) is provided with a magnetic separation groove (7). The rotating shaft assembly (2) comprises a rotating shaft body (201), the rotating shaft body (201) is provided with a mounting block (202) at the top end, the mounting block (202) is provided with a sealing gasket (203) on the outer surface, the mounting block (202) is provided with a first connecting hole (204) on one side, the sealing gasket (203) is provided with a spline shaft sleeve (205) on the outer surface, the spline shaft sleeve (205) is provided with a mounting groove (206) at the bottom, the spline shaft sleeve (205) is provided with a second connecting hole (207) below one side, the second connecting hole (207) is internally provided with a connecting rod (208), one side of the outer surface of the connecting rod (208) is provided with a forward thread (209), the connecting rod (208) is provided with a forward locking nut (2010) on the outer surface of the forward thread (209), the other side of the outer surface of the connecting rod (208) is provided with a reverse thread (2011), the connecting rod (208) is provided with a reverse locking nut (2012) on the outer surface of the reverse thread (2011).

2. A permanent magnet synchronous motor rotor structure according to claim 1, characterized in that: The sealing gasket (203) is installed on the mounting block (202) by adhesive connection, the size of the mounting block (202) is matched with the size of the mounting groove (206), and the mounting block (202) is integrally arranged with the rotating shaft body (201).

3. A permanent magnet synchronous motor rotor structure according to claim 2, characterized in that: The positions of the first connecting hole (204) and the second connecting hole (207) are correspondingly arranged, and the sizes of the first connecting hole (204) and the second connecting hole (207) are matched with the size of the connecting rod (208).

4. A permanent magnet synchronous motor rotor structure according to claim 3, characterized in that: The forward thread (209) and the reverse thread (2011) are integrally arranged with the connecting rod (208), and the sizes of the forward locking nut (2010) and the reverse locking nut (2012) are matched with the sizes of the forward thread (209) and the reverse thread (2011) respectively.

5. A permanent magnet synchronous motor rotor structure according to claim 4, characterized in that: The size of the magnet slot (4) is matched with the size of the permanent magnet (5), the permanent magnet (5) is integrally arranged in an arc shape, the number of the permanent magnet (5) is four groups, and the four groups of permanent magnets (5) are arranged in a ring array.

6. A permanent magnet synchronous motor rotor structure according to claim 5, characterized in that: The glue (6) is specifically made of non-magnetic material, and the positions of the glue (6) and the magnetic separation groove (7) are correspondingly arranged.

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