Magnetic ring mounting device and motor

Abstract

The utility model discloses a magnetic ring installation device and a motor, the magnetic ring installation device comprises a magnetic ring seat, the magnetic ring seat comprises an annular flange plate and a neck part which is formed by extending from one side of the annular flange plate along the axis of the annular flange plate, and the outer side wall of the neck part is provided with a buckle; and the magnetic ring is arranged on the periphery of the neck part in a sleeving mode and is in clearance fit with the periphery of the neck part, and the magnetic ring is connected between the buckle and the annular flange plate in an abutting mode in the axial direction. According to the magnetic ring installation device, the installation process is simple, a special pressing device is not needed when the magnetic ring is installed on the magnetic ring base, and cost reduction is facilitated.

Description

TECHNICAL FIELD

[0001] The utility model relates to the structure spare part of electric equipment, concretely relates to a magnetic ring mounting device and motor. BACKGROUND

[0002] The magnetic ring is a kind of brittle material with magnetism, and is part of motor control system. Because it is brittle material, its installation and connection need the help of transition piece such as plastic with certain buffer compression amount, and is connected to motor shaft. The plastic piece in this application is usually called magnetic ring seat.

[0003] Motor drives shaft movement, and magnetic ring rotates with shaft, and is counted by hall sensor coupled with magnetic ring. Relative movement between magnetic ring and shaft is not allowed. At present, to ensure reliable connection of magnetic ring and shaft, magnetic ring seat usually needs interference fit between inner shaft and outer magnetic ring to provide friction during rotation with interference amount, so that shaft drives magnetic ring movement. However, this assembly method needs to equip each dedicated pressing device for two interference fits, and the production cost is high.

[0004] The information disclosed in this BACKGROUND section is only for the purpose of increasing the understanding of the background of the present utility model, and should not be regarded as acknowledging or in any form implying that it constitutes prior art known to those of ordinary skill in the art. CONTENT OF UTILITY MODEL

[0005] The utility model aims at solving the technical problems of prior art, and provides a magnetic ring mounting device and motor, which are simple in installation process, do not need dedicated pressing device for magnetic ring installation in magnetic ring seat, and are beneficial to cost reduction.

[0006] To solve the above technical problems, the first aspect of the utility model discloses a magnetic ring mounting device, which comprises:

[0007] The magnetic ring seat comprises annular flange plate for being sleeved on the outer periphery of shaft and neck part formed in the axial direction from the inner end of one side of the annular flange plate, and the outer side wall of the neck part is provided with buckle;

[0008] And the magnetic ring is sleeved on the outer periphery of the neck part, and the magnetic ring is abutted between the buckle and the annular flange plate in the axial direction.

[0009] In an embodiment, the magnetic ring is clearance fit with the outer periphery of the neck part.

[0010] In some embodiments, the inner end of the magnetic ring away from the annular flange plate is also provided with buckle-avoiding installation slot for accommodating the buckle; when the buckle is buckled into the buckle-avoiding installation slot, the magnetic ring is abutted between the buckle and the annular flange plate in the axial direction.

[0011] Specifically, the width of the buckle-avoiding installation slot is adapted to the width of the buckle.

[0012] In some embodiments, the magnetic ring is further provided with a ring flange installation slot on the side close to the ring flange, and the ring flange is embedded in the ring flange installation slot when the magnetic ring is abutted between the buckle and the ring flange in the axial direction.

[0013] Preferably, the side surface of the ring flange is further provided with a notch, forming a flat structure of the ring flange. The shape of the ring flange installation slot is adapted to the shape of the ring flange.

[0014] In some embodiments, at least one pair of buckles is provided on the outer side wall of the neck, and each pair of buckles is symmetrically arranged relative to the extension of the neck.

[0015] In some embodiments, a reserved slot corresponding to the buckle is formed on the outer side wall of the neck, and the reserved slot is located on the side of the corresponding buckle close to the ring flange.

[0016] In some embodiments, a convex rib for interference fit with the outer periphery of the shaft is formed on the inner ring side wall of the ring flange. The convex rib is arranged on the inner ring side wall of the ring flange away from the buckle.

[0017] Specifically, the convex rib extends to the side of the neck away from the ring flange in the axial direction.

[0018] The second aspect of the utility model discloses a motor, which comprises a shaft and a magnetic ring mounting device as described above.

[0019] Beneficial effects:

[0020] 1. The magnetic ring mounting device of the utility model prevents the magnetic ring from moving axially by abutting the magnetic ring between the buckle of the magnetic ring seat and the ring flange of the magnetic ring seat in the axial direction. This clamping method is convenient to install, does not require a special pressing device, and is conducive to cost saving.

[0021] 2. In one embodiment of the utility model, before the magnetic ring buckle is connected to the magnetic ring seat and the shaft is not pressed into the magnetic ring seat, the magnetic ring is matched with the outer periphery of the neck. The size of the gap should be selected so that the outer periphery of the neck in the magnetic ring seat deformed due to the pressing of the shaft is in contact with the magnetic ring, or is matched with a small interference. Compared with the prior art in which the magnetic ring and the magnetic ring seat, and the magnetic ring seat and the shaft are all fixed by interference fit, the structure of the utility model can reduce the risk of the magnetic ring being cracked under high temperature.

[0022] 2. In order to improve the stability of the magnetic ring provided by the magnetic ring, the magnetic ring is circumferentially limited between the magnetic ring and the magnetic ring seat, an embodiment of the utility model utilizes the buckle avoiding installation slot for accommodating buckle opened in the inner end of the side of the magnetic ring away from the annular flange plate to realize, through buckle buckling into buckle avoiding installation slot, realize the circumferential direction limiting of magnetic ring and magnetic ring seat, reach the effect of not relative rotation, in another embodiment, then through the annular flange plate with flat position structure is embedded in the annular flange plate installation slot opened in the side of the magnetic ring close to the annular flange plate and with the annular flange plate adaptation to realize.

[0023] 3. In an embodiment of the utility model, the magnetic ring seat is in interference fit with the outer peripheral side wall of the shaft through the inner ring rib, the rib is arranged on the inner ring side wall of the annular flange plate away from the buckle to avoid the negative influence caused by the deformation of the buckle. BRIEF DESCRIPTION OF DRAWINGS

[0024] The above and / or other aspects of the utility model will become more apparent by the following detailed description of the utility model in connection with the accompanying drawings.

[0025] Figure 1 The three-dimensional structure schematic view of the magnetic ring seat provided for the first embodiment of the utility model is shown in the figure.

[0026] Figure 2 The three-dimensional structure schematic view of the magnetic ring provided for the first embodiment of the utility model is shown in the figure. Figure 1

[0027] Figure 3 The three-dimensional structure schematic view of the magnetic ring provided for the first embodiment of the utility model is shown in the figure.

[0028] Figure 4 The three-dimensional structure schematic view of the magnetic ring provided for the first embodiment of the utility model is shown in the figure.

[0029] Figure 5 The three-dimensional structure schematic view of the magnetic ring provided for the first embodiment of the utility model is shown in the figure. Figure 4

[0030] The three-dimensional structure schematic view of the magnetic ring provided for the first embodiment of the utility model is shown in the figure. Figure 6

[0031] The three-dimensional structure schematic view of the magnetic ring provided for the first embodiment of the utility model is shown in the figure. Figure 7

[0032] The three-dimensional structure schematic view of the magnetic ring provided for the first embodiment of the utility model is shown in the figure. Figure 8

[0033] ​​The reference signs are explained as follows: 100, magnetic ring seat; 110, annular flange; 111, notch; 120, neck; 130, buckle; 140, reserved groove; 150, convex rib; 200, magnetic ring; 210, buckle avoidance installation groove; 220, annular flange installation groove; 230, communication groove; 300, shaft. DETAILED DESCRIPTION

[0034] Embodiment 1

[0035] The embodiment provides a magnetic ring installation device, which comprises a magnetic ring seat 100 and a magnetic ring 200. The magnetic ring seat 100 is preferably a plastic part. Referring to Figure 1 and Figure 2 , the magnetic ring seat 100 comprises an annular flange 110 for coaxially sleeving the outer periphery of a shaft 300 and a neck 120 extending from the inner end of one side of the annular flange 110 in the direction of the shaft 300 and being configured to receive the shaft 300, and a buckle 130 is arranged on the outer side wall of the end of the neck 120 away from the annular flange 110. Referring to Figure 4 and Figure 5 , the magnetic ring 200 is sleeved on the outer periphery of the neck 120, and the magnetic ring 200 is abutted between the buckle 130 and the annular flange 110 in the axial direction, thereby preventing the axial movement of the magnetic ring 200.

[0036] Unlike the interference fit fixation of the magnetic ring and the magnetic ring seat in the prior art, the magnetic ring and the magnetic ring seat of the embodiment are connected through the buckle 130 to limit the axial relative movement, and the magnetic ring 200 is gap-fitted with the outer periphery of the neck 120, thereby avoiding the risk of the magnetic ring being cracked due to the interference fit of the magnetic ring and the magnetic ring seat in the prior art.

[0037] During assembly, referring to Figure 5 , the magnetic ring 200 is first connected to the magnetic ring seat 100 through the buckle. When the magnetic ring 200 moves to contact the buckle 130, the buckle 130 is deformed under the pressure of the magnetic ring 200 as the magnetic ring 200 further moves in the direction close to the annular flange 110, thereby allowing the magnetic ring 200 to be sleeved on the neck 120 and further move towards the annular flange 110. After the magnetic ring 200 is in place, the buckle 130 is restored, and the restored buckle 130 is matched with the annular flange 110 to axially clamp the magnetic ring 200, thereby realizing the axial relative movement of the magnetic ring 200 and the magnetic ring seat 100. Then, under the action of a press-fitting tool, one end of the shaft 300 is sequentially inserted through the neck 120 and the annular flange 110 and connected together in interference fit with at least any one of the neck 120 and the annular flange 110.

[0038] In order to avoid the risk of the magnetic ring being expanded and cracked due to the interference fit between the magnetic ring and the magnetic ring seat when the subsequent shaft 300 is pressed into the magnetic ring seat, in some embodiments, the magnetic ring 200 is provided with a gap fit between the outer periphery of the neck portion 120 before the magnetic ring 200 is buckled to the magnetic ring seat 100 and the shaft 300 is pressed into the magnetic ring seat 100. The size of the gap should be selected so that the outer periphery of the neck portion 120 in the magnetic ring seat 100 deformed by the pressing of the shaft 300 is in contact with the magnetic ring 200, or fits with a small interference.

[0039] Further, in order to improve the stability of the magnetic field provided by the magnetic ring of the permanent magnet, the circumferential limit between the magnetic ring 200 and the magnetic ring seat 100 is provided.

[0040] In the present embodiment, in order to realize the circumferential limit between the magnetic ring 200 and the magnetic ring seat 100, referring to Figure 3 , the side far away from the annular flange plate 110 of the magnetic ring 200 is also provided with a buckle avoiding installation slot 210 for accommodating the buckle 130. Referring to Figure 5 , when the buckle 130 is buckled into the buckle avoiding installation slot 210, the magnetic ring 200 is abutted between the buckle 130 and the annular flange plate 110 in the axial direction. The present embodiment realizes the circumferential limit by buckling the buckle 130 into the buckle avoiding installation slot 210, so as to achieve the purpose of the magnetic ring 200 and the magnetic ring seat 100 not rotating relative to each other.

[0041] Further, referring to Figure 3 and Figure 5 , in order to minimize the gap between the magnetic ring 200 and the outer periphery of the neck portion 120, the inner end of the magnetic ring 200 is also provided with a communication slot 230 for the deformed buckle 130 to pass through and buckle into the buckle avoiding installation slot 210. In the direction of the magnetic ring 200 being sleeved into the neck portion 120, the communication slot 230 communicates the annular flange plate installation slot 220 and the other side of the magnetic ring 200.

[0042] In some embodiments, referring to Figure 3 and Figure 5 , the magnetic ring 200 is also provided with an annular flange plate installation slot 220 on the side close to the annular flange plate 110, and when the magnetic ring 200 is abutted between the buckle 130 and the annular flange plate 110 in the axial direction, the annular flange plate 110 is embedded in the annular flange plate installation slot 220, so as to save the assembly space of the overall assembly.

[0043] In some embodiments, referring to Figure 1 , at least one pair of buckles 130 is provided on the outer side wall of the neck portion 120, and each pair of buckles 130 is symmetrically arranged relative to the extension direction of the neck portion 120.

[0044] The pair of buckles 130 are symmetrically arranged relative to the extending direction of the neck 120, so that the magnetic ring is balanced in force and the stability of the assembly is improved.

[0045] In order to enable the buckle 130 to deform, referring to Figure 1 and Figure 2 , a reserved slot 140 corresponding to the buckle 130 is arranged on the outer side wall of the neck 120, and the reserved slot 140 is located on the side of the corresponding buckle 130 close to the annular flange 110. In this way, when the magnetic ring seat 100 is assembled into the magnetic ring 200, the buckle 130 has a retreat and rebound space, which is easy to assemble.

[0046] In some embodiments, referring to Figure 1 , the inner circle side wall of the annular flange 110 is inwardly protruded to form a protruding rib 150 for interference fit with the outer peripheral side wall of the shaft 300.

[0047] The magnetic ring seat 100 of the embodiment is fixedly connected with the shaft 300 through the interference fit of the protruding rib 150 and the outer peripheral side wall of the shaft 300.

[0048] Preferably, referring to Figure 2 , the protruding rib 150 is arranged at a position away from the buckle 130 on the inner circle side wall of the annular flange 110.

[0049] In this embodiment, the buckle 130 is easily deformed by arranging the protruding rib 150 at a position away from the buckle 130 on the inner circle side wall of the annular flange 110.

[0050] Preferably, the protruding ribs 150 are arranged in pairs and each pair of protruding ribs 150 is symmetrically arranged relative to the extending direction of the neck 120.

[0051] In some embodiments, referring to Figure 2 , the protruding rib 150 extends to the side of the neck 120 away from the annular flange 110 in the direction of the shaft 300, so as to increase the area of interference fit as much as possible and improve the stability of the fixed connection.

[0052] In a specific embodiment, referring to Figure 5 , after assembly, the annular flange 110 is coaxially sleeved on the outer periphery of the shaft 300. The magnetic ring 200 is a ring-shaped permanent magnet with a rectangular cross section.

[0053] Embodiment 2

[0054] Unlike embodiment 1, referring to Figure 6 , the side of the annular flange 110 is also provided with a notch 111, thereby forming a flat structure of the annular flange 110. Meanwhile, referring to Figure 7 , the shape of the annular flange mounting groove 220 of the embodiment is adapted to the shape of the annular flange 110, referring to Figure 8When the magnetic ring 200 abuts against the clasp 130 and the annular flange 110 in the axial direction, the annular flange 110 is embedded in the annular flange mounting groove 220.

[0055] In the embodiment, referring to Figure 7 , in the direction of the magnetic ring 200 being sleeved into the neck portion 120, the communication groove 230 communicates the annular flange mounting groove 220 and the clasp avoiding mounting groove 210.

[0056] Embodiment 3

[0057] The embodiment provides a motor, which comprises a shaft 300 and the magnetic ring mounting device as described above, and is used for mounting the magnetic ring 200 on the shaft 300.

[0058] The utility model provides a kind of magnetic ring mounting device and the thought and method of motor, the method and approach of specifically realizing this technical scheme are many, above-mentioned is only preferred embodiment of the utility model, it should be pointed out, for the ordinary skilled in the art of this technology, without departing from the principle of the utility model, still can make several improvements and refinements under the premise, these improvements and refinements also should be regarded as the protection scope of the utility model.The components not explicitly in the embodiment can be realized by prior art.

Claims

1. A magnetic ring mounting device, characterized in that, include: The magnetic ring seat (100) includes an annular flange (110) for fitting around the outer periphery of the shaft (300) and a neck (120) extending from the inner end of one side of the annular flange (110) along the direction of the shaft (300), wherein a snap (130) is provided on the outer side wall of the neck (120). And a magnetic ring (200), which is sleeved on the outer periphery of the neck (120) and abuts axially between the buckle (130) and the annular flange (110).

2. The magnetic ring mounting device according to claim 1, characterized in that, The magnetic ring (200) is fitted with the outer periphery of the neck (120) with a clearance.

3. The magnetic ring mounting device according to claim 1 or 2, characterized in that, The magnetic ring (200) is provided with a snap-fit ​​clearance mounting groove (210) on the inner end of the side away from the annular flange (110) for accommodating the snap-fit ​​(130); when the snap-fit ​​(130) is snapped into the snap-fit ​​clearance mounting groove (210), the magnetic ring (200) abuts against the snap-fit ​​(130) and the annular flange (110) along the axial direction.

4. The magnetic ring mounting device according to claim 3, characterized in that, The width of the buckle avoidance mounting groove (210) is adapted to the width of the buckle (130).

5. The magnetic ring mounting device according to claim 1, characterized in that, The magnetic ring (200) is also provided with an annular flange mounting groove (220) on the side near the annular flange (110). When the magnetic ring (200) abuts against the buckle (130) and the annular flange (110) along the axial direction, the annular flange (110) is embedded in the annular flange mounting groove (220).

6. The magnetic ring mounting device according to claim 5, characterized in that, The annular flange (110) also has a notch (111) on its side, forming a flat structure of the annular flange (110); the shape of the annular flange mounting groove (220) is adapted to the shape of the annular flange (110).

7. The magnetic ring mounting device according to claim 1, characterized in that, At least one pair of latches (130) are provided on the outer wall of the neck (120), and each pair of latches (130) is symmetrically arranged with respect to the extension direction of the neck (120).

8. The magnetic ring mounting device according to claim 1, characterized in that, A reserved groove (140) corresponding to the buckle (130) is provided on the outer wall of the neck (120). The reserved groove (140) is located on the side of the buckle (130) close to the annular flange (110).

9. The magnetic ring mounting device according to claim 1, characterized in that, The inner ring sidewall of the annular flange (110) has an inwardly protruding rib (150) for interference fit with the outer circumference of the shaft (300); the rib (150) is located on the inner ring sidewall of the annular flange (110) away from the snap (130); the rib (150) extends along the direction of the shaft (300) to the side of the neck (120) away from the annular flange (110).

10. An electric motor, characterized in that, It includes a shaft (300) and a magnetic ring mounting device as described in any one of claims 1 to 9.

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