Wheel hub motor rotor structure

Abstract

The utility model provides a wheel hub motor rotor structure, which comprises a wheel hub body, one side of the wheel hub body is provided with an installation cavity, a magnetic conductive ring is fixedly connected in the installation cavity, the magnetic conductive ring is formed by stacking a plurality of silicon steel sheet rings, and the purpose of improving the transmission efficiency is achieved.

Description

Technical Field

[0001] The utility model relates to a wheel hub, in particular to a wheel hub motor rotor structure. Background Art

[0002] At present, a Chinese patent with authorization announcement number CN20420577U discloses a hub motor, the key points of its technical solution are: it includes a rotor and a stator, the stator includes a fixed shaft fixed to the electric vehicle, the rotor includes a hub, the fixed shaft is passed through the axis of the hub, the hub is provided with an annular groove, a retaining ring is fixed on the fixed shaft, the retaining ring is located in the groove, a thrust ball bearing is provided between the retaining ring and the side wall of the groove, the number of thrust ball bearings is two, and the thrust ball bearings are distributed on both sides of the retaining ring.

[0003] The thrust ball bearing disposed between the retaining ring and the groove allows the wheel hub to withstand axial pressure when tilting, which can limit the position between the wheel hub and the fixed shaft on the one hand, and on the other hand, the original ball bearing no longer conflicts with the fixed shaft, and the ball bearing is no longer subjected to axial force when the wheel hub turns, thereby protecting the ball bearing. However, the wheel hub of this type of hub motor usually uses iron as the magnetic conductive material, which has low magnetic conductivity and low transmission efficiency. Utility Model Content

[0004] In view of this, the purpose of the utility model is to provide a hub motor rotor structure, which improves magnetic conductivity and transmission efficiency by replacing the iron ring with a silicon steel sheet ring.

[0005] In order to solve the above technical problems, the technical solution of the utility model is: a hub motor rotor structure, including a hub body, a mounting cavity is opened on one side of the hub body, a magnetic conductive ring is fixedly connected in the mounting cavity, and the magnetic conductive ring is formed by stacking multiple silicon steel sheet rings.

[0006] To implement the above technical solution, multiple silicon steel sheet rings are stacked into a magnetic ring, which is then embedded and fixed in the installation cavity. Since the magnetic conductivity of silicon steel sheets is much greater than that of iron, the transmission efficiency of the hub body is improved.

[0007] As a preferred solution of the utility model, the hub body includes a mounting ring, a supporting portion, and a limiting ring. The mounting ring is located inside the limiting ring and is coaxially arranged. The two ends of the supporting portion are respectively connected to the mounting ring and the limiting ring. The magnetic conductive ring is fixedly connected to the mounting ring.

[0008] To implement the above technical solution, the tire is fixed on the limiting ring, and the limiting ring is supported by the supporting part.

[0009] As a preferred solution of the utility model, the support portion is provided with an air outlet, an air inlet and an air guide hole, the air inlet is close to the magnetic ring, the air outlet is close to the limiting ring, and the two ends of the air guide hole are respectively connected to the air inlet and the air outlet.

[0010] To implement the above technical solution, during the rotation of the hub body, the air is discharged from the air outlet due to the action of centrifugal force, and due to the action of negative pressure, the air is sucked into the air inlet and enters the air guide hole, thereby realizing circulation, thereby improving the heat dissipation of the mounting ring, so that when the motor generates heat during long-term high-speed operation, the silicon steel sheet ring is not easily demagnetized.

[0011] As a preferred solution of the utility model, a positioning ring is fixedly connected in the air guide hole, a partition plate for covering the positioning ring slides in the air guide hole, and an elastic structure is provided between the partition plate and the inner wall of the air guide hole.

[0012] To implement the above technical solution, when stationary, the elastic force of the elastic structure is used to block the positioning ring with the partition, so as to reduce the amount of dust falling on the silicon steel sheet ring. When the hub body rotates at high speed, the centrifugal force is greater than the elastic force of the elastic structure, so that the partition is separated from the positioning ring, thereby improving the heat dissipation of the silicon steel sheet ring.

[0013] As a preferred solution of the utility model, the elastic structure includes a cross bar, a vertical bar, an elastic member and a limiting sleeve. The cross bar is fixed on the inner wall of the air guide hole, one end of the vertical bar is fixed on the cross bar, and the other end of the vertical bar passes through the positioning ring and then through the partition. The limiting sleeve is fixed to the end of the vertical bar and is used to contact the surface of the partition, one end of the elastic member is fixed on the partition, and the other end of the elastic member is fixed on the cross bar.

[0014] To implement the above technical solution, when the hub body is stationary, the elastic force of the elastic member causes the partition to contact the end of the positioning ring to block the positioning ring. When the hub body rotates at high speed, the partition can move along the length direction of the vertical rod and separate from the positioning ring.

[0015] As a preferred solution of the utility model, a guiding slope is provided on the partition, and the guiding slope is used to abut against the inner wall of the positioning ring.

[0016] To implement the above technical solution, the connection between the positioning ring and the partition plate is made tighter by setting the guiding slope.

[0017] As a preferred solution of the utility model, a heat conduction hole is opened on the mounting ring, a heat conductor is arranged in the heat conduction hole, a heat dissipation block is fixedly connected to the end of the heat conduction hole, the heat conduction block is located in the air inlet hole, one end of the heat conductor is in contact with the magnetic ring, and the other end is in contact with the heat dissipation block.

[0018] To implement the above technical solution, the heat on the silicon steel sheet ring can be quickly transferred to the heat sink through the heat conduction of the heat conductor, and then dissipated from the heat sink, thereby achieving a cooling effect on the silicon steel sheet ring to adapt to high-speed and long-term operation of the motor.

[0019] As a preferred solution of the utility model, a left end cover and a right end cover are fixedly connected to the hub body.

[0020] Implementing the above technical solution can enhance the protection of silicon steel sheet rings. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of an embodiment;

[0022] Figure 2 A schematic diagram showing the positions of the air holes, air inlet holes and air guide holes;

[0023] Figure 3 for Figure 2 Enlarged view of point A.

[0024] Figure numerals: 1. hub body; 11. mounting ring; 12. supporting portion; 13. limiting ring; 2. mounting cavity; 21. magnetic ring; 31. air outlet; 32. air inlet; 33. air guide hole; 4. positioning ring; 41. partition; 42. guiding slope; 5. elastic structure; 51. cross bar; 52. vertical bar; 53. elastic member; 54. limiting sleeve; 6. heat conduction hole; 61. heat conductor; 62. heat sink; 71. left end cover; 72. right end cover. DETAILED DESCRIPTION

[0025] The specific implementation modes of the present invention are further described below in conjunction with the accompanying drawings to make the technical solutions of the present invention easier to understand and grasp.

[0026] A hub motor rotor structure includes a hub body 1, a mounting cavity 2 with a circular cross section is opened on one side of the hub body 1, and the mounting cavity 2 is coaxially arranged with the hub body 1. A magnetic conductive ring 21 is fixedly connected in the mounting cavity 2, and the magnetic conductive ring 21 is formed by stacking a plurality of silicon steel sheet rings. The silicon steel sheet ring is made of silicon steel sheets. The magnetic conductive ring 21 is fixed in the mounting cavity 2 by stamping.

[0027] The hub body 1 includes a mounting ring 11, a support portion 12, and a limiting ring 13. The mounting ring 11 is located inside the limiting ring 13 and is coaxially arranged. The two ends of the support portion 12 are respectively fixedly connected to the mounting ring 11 and the limiting ring 13. The support portion 12 is arranged along the radial direction of the mounting ring 11. The magnetic conductive ring 21 is fixed on the mounting ring 11.

[0028] An air outlet hole 31, an air inlet hole 32 and an air guide hole 33 are provided on half of the supporting parts 12. The air inlet hole 32 is close to the magnetic ring 21, and the air outlet hole 31 is close to the limiting ring 13. The air outlet hole 31 and the air inlet hole 32 are both arranged obliquely. The two ends of the air guide hole 33 are respectively connected to the air outlet hole 31 and the installation cavity 2. The air guide hole 33 is arranged along the length direction of the supporting part 12.

[0029] A positioning ring 4 is fixedly connected in the air guide hole 33, and the positioning ring 4 is coaxially arranged with the air guide hole 33, and the positioning ring 4 is close to the installation cavity 2. A partition plate 41 for covering the positioning ring 4 slides in the air guide hole 33. A guiding inclined surface 42 is provided on the outer wall of the partition plate 41, and the guiding inclined surface 42 is used to contact the inner wall of the positioning ring 4.

[0030] An elastic structure 5 is provided between the partition 41 and the inner wall of the air guide hole 33. The elastic structure 5 includes a cross bar 51, a vertical bar 52, an elastic member 53 and a limiting sleeve 54. The cross bar 51 is fixed to the inner wall of the air guide hole 33, and the cross bar 51 is arranged along the radial direction of the air guide hole 33. One end of the vertical bar 52 is fixed to the cross bar 51, and the other end of the vertical bar 52 passes through the positioning ring 4 and then passes through the partition 41. The vertical bar 52 is coaxially arranged with the air guide hole 33. The limiting sleeve 54 is fixed to the end of the vertical bar 52 and is used to contact the surface of the partition 41. The partition 41 is located between the limiting sleeve 54 and the positioning ring 4. One end of the elastic member 53 is fixed to the partition 41, and the other end of the elastic member 53 is fixed to the cross bar 51. The elastic member 53 is a spring.

[0031] A heat conducting hole 6 is provided on the mounting ring 11, and a heat conductor 61 is provided in the heat conducting hole 6, and the heat conductor 61 is a heat conducting silicone grease. A heat dissipation block 62 made of aluminum is fixedly connected to the end of the heat conducting hole 6, and a part of the heat conducting block is located in the air inlet 32. One end of the heat conductor 61 contacts the outer wall of the magnetic ring 21, and the other end contacts the heat dissipation block 62. The heat dissipation block 62 has the effect of dissipating heat and preventing the heat conductor 61 from leaking out of the heat conducting hole 6.

[0032] A left end cover 71 and a right end cover 72 are respectively fixedly connected to two side walls of the mounting ring 11 by bolts.

[0033] Of course, the above are only typical examples of the present invention. In addition, the present invention may have many other specific implementations. Any technical solutions formed by equivalent replacement or equivalent transformation fall within the scope of protection required by the present invention.

Claims

1. A hub motor rotor structure, comprising a hub body (1), wherein one side of the hub body (1) is provided with a mounting cavity (2), wherein: A magnetic conductive ring (21) is fixedly connected in the installation cavity (2), and the magnetic conductive ring (21) is formed by stacking a plurality of silicon steel sheet rings.

2. The hub motor rotor structure according to claim 1, characterized in that: The hub body (1) comprises a mounting ring (11), a supporting portion (12), and a limiting ring (13); the mounting ring (11) is located inside the limiting ring (13) and is coaxially arranged; the two ends of the supporting portion (12) are respectively connected to the mounting ring (11) and the limiting ring (13); the magnetic conductive ring (21) is fixedly connected to the mounting ring (11); and the supporting portion (12) is arranged along the radial direction of the mounting ring (11).

3. The hub motor rotor structure according to claim 2 is characterized in that: The support portion (12) is provided with an air outlet hole (31), an air inlet hole (32) and an air guide hole (33); the air inlet hole (32) is close to the magnetic ring (21); the air outlet hole (31) is close to the limiting ring (13); two ends of the air guide hole (33) are respectively connected to the air outlet hole (31) and the installation cavity (2); the air inlet hole (32) is connected to the air guide hole (33); and the air guide hole (33) is arranged along the length direction of the support portion (12).

4. The hub motor rotor structure according to claim 3 is characterized in that: A positioning ring (4) is fixedly connected inside the air guide hole (33), a partition plate (41) for covering the positioning ring (4) is slidably provided inside the air guide hole (33), and an elastic structure (5) is provided between the partition plate (41) and the inner wall of the air guide hole (33).

5. The hub motor rotor structure according to claim 4 is characterized in that: The elastic structure (5) comprises a cross bar (51), a vertical bar (52), an elastic member (53) and a limiting sleeve (54); the cross bar (51) is fixed on the inner wall of the air guide hole (33); one end of the vertical bar (52) is fixed on the cross bar (51); the other end of the vertical bar (52) passes through the positioning ring (4) and then passes through the partition (41); the limiting sleeve (54) is fixed to the end of the vertical bar (52) and is used to contact the surface of the partition (41); one end of the elastic member (53) is fixed on the partition (41); the other end of the elastic member (53) is fixed on the cross bar (51).

6. The hub motor rotor structure according to claim 4 is characterized in that: The partition plate (41) is provided with a guide slope (42), and the guide slope (42) is used to contact the inner wall of the positioning ring (4).

7. The hub motor rotor structure according to claim 3 is characterized in that: The mounting ring (11) is provided with a heat conducting hole (6), a heat conductor (61) is arranged in the heat conducting hole (6), a heat dissipation block (62) is fixedly connected to the end of the heat conducting hole (6), the heat dissipation block (62) is located in the air inlet hole (32), one end of the heat conductor (61) is in contact with the magnetic ring (21), and the other end is in contact with the heat dissipation block (62).

8. The hub motor rotor structure according to claim 1, characterized in that: The wheel hub body (1) is fixedly connected with a left end cover (71) and a right end cover (72).

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