阅读说明：本技术 通气治疗设备、风机及其电机 (Ventilation treatment equipment, fan and motor thereof ) 是由 于晓飞 费科 苏琳 于 2019-10-14 设计创作，主要内容包括：本发明公开电机,包括壳体以及设置在壳体内部的定子和转子,壳体两端设置有轴孔,转子的转轴的两端通过轴承支撑在轴孔中,电机还包括设置在至少一个轴孔中的轴承套,且轴承的一端与轴承套固定配合,轴承的另一端与轴孔固定配合。本发明可以有效地避免轴承和壳体之间发生相对滑动；并且当轴承在发生偏心运动的时候可通过轴承套进行缓冲,避免了轴承与壳体之间相对挤压而损坏轴承或者壳体。(The invention discloses a motor, which comprises a shell, a stator and a rotor, wherein the stator and the rotor are arranged in the shell, shaft holes are formed in two ends of the shell, two ends of a rotating shaft of the rotor are supported in the shaft holes through bearings, the motor also comprises a bearing sleeve arranged in at least one shaft hole, one end of each bearing is fixedly matched with the bearing sleeve, and the other end of each bearing is fixedly matched with the shaft hole. The invention can effectively avoid relative sliding between the bearing and the shell; and when the bearing eccentrically moves, the bearing can be buffered through the bearing sleeve, so that the bearing or the shell is prevented from being damaged due to relative extrusion between the bearing and the shell.)

1. The utility model provides a motor, includes the casing and sets up inside stator and the rotor of casing, the casing both ends are provided with the shaft hole, the both ends of the pivot of rotor are passed through the bearing and are supported in the shaft hole, its characterized in that: the motor is characterized by further comprising at least one bearing sleeve arranged in the shaft hole, one end of the bearing is fixedly matched with the bearing sleeve, and the other end of the bearing is fixedly matched with the shaft hole.

2. The electric machine of claim 1, wherein: the motor comprises two bearing sleeves, and the two bearing sleeves are oppositely arranged on one side, close to the rotor, of the two shaft holes.

3. The electric machine of claim 1, wherein: the bearing with between the bearing housing and the bearing housing with all interference fit between the shaft hole, just the bearing receives the unit frictional force of bearing housing is greater than the bearing receives the unit frictional force in shaft hole.

4. The electric machine of claim 1, wherein: the friction coefficient of the bearing is larger than that of the side wall of the shaft hole.

5. The electric machine of claim 1 or 2, wherein: the interference magnitude between the first end of the bearing and the bearing sleeve is larger than the interference magnitude between the second end of the bearing and the shaft hole.

6. The electric machine of claim 1 or 2, wherein: the shaft hole is a step hole, the bearing sleeve is fixedly arranged at the large diameter part of the step hole, and the small diameter part of the step hole is fixedly matched with the bearing.

7. The electric machine of claim 6, wherein: the bearing sleeve is characterized in that a bulge is arranged on one of the position of the shaft hole for assembling the bearing sleeve and the outer side wall of the bearing sleeve, a groove matched with the bulge is arranged on the other one of the position of the shaft hole for assembling the bearing sleeve and the outer side wall of the bearing sleeve, and the bearing sleeve is assembled in the shaft hole by the clamping fixation of the bulge and the groove.

8. The electric machine of claim 7, wherein: a groove is formed in the step transition position of the step hole, a first convex ring is arranged at one end of the bearing sleeve, and the first convex ring is clamped in the groove.

9. The electric machine of claim 8, wherein: and the other end of the bearing sleeve is provided with a second convex ring.

10. The electric machine of claim 9, wherein: the outer side wall of one side of the first convex ring, which is far away from the second convex ring, is provided with a first chamfer, and/or the inner side wall of one side of the second convex ring, which is far away from the first convex ring, is provided with a second chamfer.

11. The electric machine of claim 9, wherein: the first convex ring is positioned in the shaft hole, and the second convex ring is positioned outside the shaft hole and is abutted against the shaft hole.

12. A fan, its characterized in that: fan blade and a motor according to any of claims 1-11, the rotor of the motor having a shaft which is fixedly coupled to the fan blade.

13. A ventilation therapy device, characterized by: the ventilation therapy device comprises the blower of claim 12.

Technical Field

The invention relates to the field of medical health, in particular to a ventilation treatment device, a fan and a motor thereof.

Background

With the rapid development of society, an electric motor, which is a machine that can convert electric energy into mechanical energy, mainly includes an electromagnet winding or distributed stator winding for generating a magnetic field and a rotating armature or rotor. Under the action of the rotating magnetic field of the stator winding, current passes through the effective edge of the stator winding and is driven by the magnetic field to rotate. In addition to motors used in many machines used in daily life, motors are used in various devices in the medical field, such as: bi-level respirators and oxygen generators, etc.

In the application of two horizontal breathing machines and oxygenerator, need the fan to switch between low atmospheric pressure and high atmospheric pressure with certain frequency, and the height of atmospheric pressure then drives the speed that the fan blade rotated through the motor in the fan and realizes, so when the fan switches between low atmospheric pressure and high atmospheric pressure, need drive the fan blade through the motor and accelerate suddenly or the rapid deceleration. Existing motors generally include a housing, a rotor, and a bearing; wherein, the casing is provided with the accommodation space, and the bearing suit is in the rotor, and bearing and rotor all are located the accommodation space, and the lateral wall of bearing hugs closely in the inside wall of casing and realizes fixedly through the inner shell, but current motor can have following defect in actual work: when the motor accelerates and decelerates suddenly, the friction force of the balls in the bearing, which is borne by the outer ring of the bearing, can be increased, when the friction force is larger than the friction force between the shell and the outer ring of the bearing, the outer ring of the bearing can rotate along with the rotor, the outer ring of the bearing can rub against the inner side wall of the shell at the moment, the temperature of the bearing can be increased suddenly due to the friction between the bearing and the shell, meanwhile, the inner side wall of the bearing or the shell can be rubbed to drop a lot of fragments, and the situation that the rotor of the motor cannot rotate or the motor is burnt out can be caused under the common action of the temperature increased suddenly and the friction fragments.

Therefore, there is a need for a motor having a bearing and a housing that are securely connected to overcome the above-mentioned disadvantages.

Disclosure of Invention

The invention aims to provide a motor which enables a bearing and a shell to be stably connected.

Another object of the present invention is to provide a blower including a motor that stably connects a bearing and a housing.

It is a further object of the present invention to provide a ventilation therapy device including a blower having a motor that securely connects a bearing and a housing.

In order to achieve the purpose, the invention provides a motor which comprises a shell, a stator and a rotor, wherein the stator and the rotor are arranged in the shell, shaft holes are formed in two ends of the shell, two ends of a rotating shaft of the rotor are supported in the shaft holes through bearings, the motor further comprises a bearing sleeve arranged in at least one shaft hole, one end of each bearing is fixedly matched with the bearing sleeve, and the other end of each bearing is fixedly matched with the shaft hole.

Preferably, the motor comprises two bearing sleeves, and the two bearing sleeves are oppositely arranged on one side of the two shaft holes close to the rotor.

Preferably, the bearing and the bearing sleeve and the shaft hole are in interference fit, and the unit friction force of the bearing sleeve on the bearing is greater than the unit friction force of the shaft hole on the bearing.

Preferably, the coefficient of friction of the bearing is greater than the coefficient of friction of the side wall of the shaft hole.

Preferably, the interference between the first end of the bearing and the bearing sleeve is greater than the interference between the second end of the bearing and the shaft hole.

Preferably, the shaft hole is a stepped hole, the bearing sleeve is fixedly arranged at the large diameter position of the stepped hole, and the small diameter position of the stepped hole is fixedly matched with the bearing.

Preferably, a protrusion is provided on one of a portion of the shaft hole for assembling the bearing sleeve and an outer side wall of the bearing sleeve, a groove matched with the protrusion is provided on the other of the portion of the shaft hole for assembling the bearing sleeve and the outer side wall of the bearing sleeve, and the bearing sleeve is assembled in the shaft hole by the engagement and fixation of the protrusion and the groove.

Preferably, a groove is formed in the step transition position of the step hole, a first convex ring is arranged at one end of the bearing sleeve, and the first convex ring is clamped in the groove.

Preferably, the other end of the bearing sleeve is provided with a second convex ring.

Preferably, a first chamfer is disposed on an outer sidewall of a side of the first protruding ring away from the second protruding ring, and/or a second chamfer is disposed on an inner sidewall of a side of the second protruding ring away from the first protruding ring.

Preferably, the first protruding ring is located in the shaft hole, and the second protruding ring is located outside the shaft hole and abuts against the shaft hole.

In order to achieve the purpose, the invention provides a fan which comprises fan blades and the motor, wherein a rotating shaft of a rotor of the motor is fixedly matched with the fan blades.

In order to achieve the above object, the present invention provides a ventilation therapy device comprising the blower described above.

Compared with the prior art, the motor of the invention also comprises the bearing sleeve arranged in at least one shaft hole, one end of the bearing is fixedly matched with the bearing sleeve, and the other end of the bearing is fixedly matched with the shaft hole, so that the relative sliding between the bearing and the shell can be effectively avoided; and when the bearing eccentrically moves, the bearing can be buffered through the bearing sleeve, so that the bearing or the shell is prevented from being damaged due to relative extrusion between the bearing and the shell.

Drawings

Fig. 1 is a schematic view of the structure of the motor of the present invention.

Fig. 2 is a perspective view of a bearing housing of the motor of the present invention.

Fig. 3 is a sectional view of a bearing housing of the motor of the present invention.

Detailed Description

In order to explain technical contents, structural features, and effects achieved by the present invention in detail, the following detailed description is given with reference to the embodiments and the accompanying drawings.

Referring to fig. 1 to 3, a motor 100 according to the present invention includes a housing 10, and a stator and a rotor 20 disposed inside the housing 10, wherein shaft holes 10a are disposed at two ends of the housing 10, two ends of a rotating shaft of the rotor 20 are supported in the shaft holes 10a through bearings 30, the motor 100 further includes a bearing housing 40 disposed in at least one of the shaft holes 10a, one end of each of the bearings 30 is fixedly engaged with the bearing housing 40, and the other end of each of the bearings 30 is fixedly engaged with the shaft hole 10 a.

In a specific embodiment, the motor 100 includes two bearing housings 40, and the two bearing housings 40 are oppositely disposed at one side of the two shaft holes 10a close to the rotor 20, but not limited thereto; more specifically, the bearing 30 and the bearing sleeve 40 and the shaft hole 10a are in interference fit, and the unit friction force of the bearing sleeve 40 received by the bearing 30 is larger than the unit friction force of the shaft hole 10a received by the bearing 30. For example, the unit friction of the bearing sleeve 40 on the bearing 30 is greater than the unit friction of the shaft hole 10a on the bearing 30, which can be achieved by: the friction coefficient of the bearing 30 is larger than that of the side wall of the shaft hole 10 a; or the interference between the first end 31 of the bearing 30 and the bearing sleeve 40 is larger than the interference between the second end 32 of the bearing 30 and the shaft hole 10 a; or both of the above conditions may be satisfied, but not limited thereto. Preferably, the shaft hole 10a is a stepped hole, the bearing housing 40 is fixedly disposed at a large diameter portion of the stepped hole, and a small diameter portion of the stepped hole is fixedly engaged with the bearing 30. It should be noted that the bearing sleeve 40 of the present invention does not rotate relative to the housing 10, but is not limited thereto, and more specifically, as follows:

with continuing reference to fig. 1 to fig. 3, a groove 11 is formed in a portion of the shaft hole 10a for assembling the bearing sleeve 40, a protrusion matching with the groove 11 is formed on an outer side wall of the bearing sleeve 40, and the bearing sleeve 40 is assembled in the shaft hole 10a by the engagement and fixation of the protrusion and the groove 11, so that the bearing sleeve 40 can be effectively prevented from sliding along the shaft hole 10a when the bearing 30 is inserted into the bearing sleeve 40; in other embodiments, a protrusion may be further provided at a portion of the shaft hole 10a for assembling the bearing sleeve 40, and the outer side wall of the bearing sleeve 40 may be provided with a groove matching with the protrusion 11, but is not limited thereto. Specifically, the bearing sleeve 40 has elasticity, for example, the bearing sleeve 40 may be made of plastic, rubber, etc., but is not limited thereto.

With continued reference to fig. 1 to 3, one end of the bearing housing 40 is provided with a first convex ring 41, i.e. a protrusion; the other end of the bearing sleeve 40 is provided with a second convex ring 42, a step transition part of the step hole is provided with a groove 11, and the first convex ring 41 is clamped in the groove 11. Specifically, the outer side wall of the first protruding ring 41 away from the second protruding ring 42 is provided with a first chamfer 411, so that when the bearing sleeve 40 is inserted into the housing 10, the first chamfer 411 can be guided more smoothly; more specifically, the inner side wall of the second protruding ring 42 on the side away from the first protruding ring 41 is provided with a second chamfer 421, so that the bearing 30 is inserted into the bearing sleeve 40 under the guiding action of the second chamfer 421, but not limited thereto. For example, the first chamfer 411 and the second chamfer 421 may be 60 degrees, but are not limited thereto. It should be noted that, as shown in fig. 1, the first protruding ring 411 of the motor 100 of the present invention is located in the shaft hole 10a, and the second protruding ring 421 is located outside the shaft hole 10a and abuts against the shaft hole 10a, so when the bearing 30 is installed in the housing 10, only the first protruding ring 41 needs to be inserted into the shaft hole 10a, and then the bearing sleeve 40 and the shaft hole 10a need to be fixed in a snap-fit manner, and the whole bearing sleeve 40 does not need to be inserted into the shaft hole 10a, thereby facilitating the installation and removal of the bearing sleeve 40. Specifically, the bearing housing 40 is in surface contact with the bearing 30, and thus the bearing housing 40 of the present invention makes the housing between the bearing housing 40 and the bearing 30 more stable by increasing the contact area with the bearing 30 than the line contact formed between the existing O-ring and the bearing 30, but is not limited thereto.

In other embodiments, the motor 100 is provided with only one bearing housing 30, and the bearing housing 30 may be provided in any one of the two shaft holes 10 a.

It is noted that the present invention also discloses a ventilation therapy device comprising a blower having the above-mentioned motor 100. For example, the ventilation therapy device may be a ventilator or an oxygen generator, but is not limited thereto.

Compared with the prior art, because the motor 100 of the present invention further comprises the bearing housing 40 disposed in at least one shaft hole 10a, and one end of the bearing 30 is fixedly fitted with the bearing housing 40, and the other end of the bearing 30 is fixedly fitted with the shaft hole 10a, relative sliding between the bearing 30 and the housing 10 can be effectively avoided; and when the bearing 30 performs eccentric motion, the bearing sleeve 40 can buffer the eccentric motion, so that the bearing 30 or the shell 10 is prevented from being damaged due to relative extrusion between the bearing 30 and the shell 10.

The above disclosure is only a preferred embodiment of the present invention, which is convenient for those skilled in the art to understand and implement, and certainly not to limit the scope of the present invention, therefore, the present invention is not limited by the claims and their equivalents.