CN214543915U

CN214543915U - High-speed motor

Info

Publication number: CN214543915U
Application number: CN202120861539.1U
Authority: CN
Inventors: 陈锋; 吴雄; 朱秦叶
Original assignee: Suzhou Tie Jin Science & Technology Corp ltd
Current assignee: Suzhou Tie Jin Science & Technology Corp ltd
Priority date: 2021-04-25
Filing date: 2021-04-25
Publication date: 2021-10-29
Anticipated expiration: 2031-04-25

Abstract

The utility model relates to a high-speed motor, establish two at least bearings in the motor shaft outside including motor shaft, cover, every bearing has the interior circumference that sets up towards the outer periphery of motor shaft, has the clearance between the interior circumference of bearing and the outer periphery of motor shaft, and high-speed motor is still including setting up the connecting piece in order to connect motor shaft and bearing in the clearance. Through set up the connecting piece between motor shaft and bearing, this connecting piece is used for connecting motor shaft and bearing to reduce the bad influence to the bearing precision of motor shaft circularity, can also reduce the influence of the stress of bearing to the life-span of bearing simultaneously.

Description

High-speed motor

Technical Field

The utility model relates to a high-speed motor.

Background

At present, with the rapid development of national economy, the application range of a high-speed motor is wider and wider, but the high-speed motor in the prior art has low precision of a bearing due to poor concentricity of a motor shaft and the bearing, so that the service life of the whole machine is prolonged.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a high-speed motor, its bearing have the characteristics of precision height, longe-lived.

In order to achieve the above purpose, the utility model provides a following technical scheme: a high-speed motor comprises a motor shaft, at least two bearings sleeved on the outer side of the motor shaft, wherein each bearing is provided with an inner circumferential surface arranged towards an outer circumferential surface of the motor shaft, a gap is formed between the inner circumferential surface of each bearing and the outer circumferential surface of the motor shaft, and the high-speed motor further comprises a connecting piece arranged in the gap and used for connecting the motor shaft and the bearings.

Furthermore, the connecting piece is solid and comprises a supporting accessory and bonding bodies which are fixedly connected with the supporting accessory and arranged on two sides of the supporting accessory; or the connecting piece is an adhesive body.

Further, the connecting member has two states, and the connecting member is in a liquid state when filled into the gap and is solidified in a solid state at room temperature.

Further, each bearing comprises an outer ring and an inner ring sleeved in the outer ring and connected with the outer ring, and the high-speed motor further comprises a spacer bush which is used for connecting the outer rings of the two adjacent bearings.

Furthermore, bosses are arranged at two ends of the spacer bush and extend into the outer ring.

Furthermore, a dustproof groove is formed in one side, facing the inner ring, of the outer ring, and the boss extends into the dustproof groove.

Furthermore, each bearing also comprises a sealing ring, one end of each sealing ring is arranged in the dust-proof groove, and the other end of each sealing ring is abutted against the inner ring.

Further, the bearing also comprises balls and a retainer, wherein the retainer is arranged between the outer ring and the inner ring, and the balls are arranged on the retainer.

Further, the retainer is a glass fiber reinforced nylon retainer.

Further, the high-speed motor further comprises a bearing sleeve, and the bearing sleeve is sleeved on the outer side of the bearing.

The beneficial effects of the utility model reside in that: by arranging the connecting piece between the motor shaft and the bearing, the connecting piece is used for connecting the motor shaft and the bearing, so that the influence of poor roundness of the motor shaft on the precision of the bearing is reduced, and the influence of the stress of the bearing on the service life of the bearing is reduced.

The above description is only an overview of the technical solution of the present invention, and in order to make the technical means of the present invention clearer and can be implemented according to the content of the description, the following detailed description is made with reference to the preferred embodiments of the present invention and accompanying drawings.

Drawings

Fig. 1 is a schematic structural diagram of a high-speed motor according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a high-speed motor according to another embodiment of the present invention.

Detailed Description

The technical solutions of the present application will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

In addition, the technical features mentioned in the different embodiments of the present application described below may be combined with each other as long as they do not conflict with each other.

Referring to fig. 1, a high-speed motor 100 according to an embodiment of the present invention includes a motor shaft 1, at least two bearings 3 sleeved outside the motor shaft 1, and a bearing housing 5. Wherein, the bearing sleeve 5 is sleeved outside the two bearings 3 to improve the service life of the high-speed motor 100.

The bearing 3 includes an outer ring 31, an inner ring 32 fitted in the outer ring 31 and connected to the outer ring 31, balls 33, and a cage 34. Specifically, a cage 34 is provided between the outer race 31 and the inner race 32, and balls 33 are mounted on the cage 34.

In order to fix the connection between the motor shaft 1 and the bearing 3, a gap 2 is provided between the bearing 3 and the motor shaft 1, and a connector (not shown) is provided in the gap 2 to reduce the influence of poor roundness of the motor shaft 1 on the accuracy of the bearing 3 and reduce the influence of stress caused by interference on the inner ring 32 of the bearing 3 on the service life of the bearing 3. In the present embodiment, each bearing 3 has an inner circumferential surface disposed toward the outer circumferential surface of the motor shaft 1, the above-mentioned gap 2 is formed between the inner circumferential surface (not numbered) of the bearing 3 and the outer circumferential surface (not numbered) of the motor shaft 1, and the connecting member is disposed in the gap 2. The connecting piece can be a solid connecting piece, and the solid connecting piece comprises a supporting accessory (not shown) and adhesion bodies (not shown) which are fixedly connected with the supporting accessory and arranged at two sides of the supporting accessory, wherein the adhesion bodies are used for connecting and fixing the motor shaft 1 and the bearing 3; alternatively, the connecting member may be directly an adhesive member. In this embodiment, the connecting member is a glue having two states, and when the high-speed motor 100 is assembled, the glue is in a liquid state when filled into the gap and is solidified in a solid state at room temperature, so as to fixedly connect the motor shaft 1 and the bearing 3.

The bearing 3 further includes balls 33 and a cage 34, the cage 34 being disposed between the outer race 31 and the inner race 32, and the balls 33 being mounted on the cage 34. In this embodiment, the retainer 34 is a glass fiber reinforced nylon retainer 34, which has the characteristics of good strength and elasticity, chemical corrosion resistance, aging resistance, etc., in other embodiments, the material of the retainer 34 may also be other, such as a steel retainer, a brass retainer, etc., and is not limited specifically herein.

In order to ensure the rotation accuracy of the bearing 3, a worker needs to apply a preload to mount the high-speed motor 100. The high-speed motor 100 further includes a spacer 4, and the spacer 4 is used to connect the outer rings 31 of two adjacent bearings 3, so that the pretightening force of the two bearings 3 is consistent. When the high-speed motor 100 is installed, a worker applies a preload force to the inner rings 32 of the two bearings 3 through the load blocks (the preload force is applied in the direction of arrow a in fig. 1 and 2), the preload force is transmitted to the outer ring 31 of the bearing 3 through the balls 33 and the retainer 34, then the outer ring 31 of the bearing 3 transmits the preload force to the outer ring 31 of the adjacent bearing 3 through the spacer 4, and the preload force is transmitted to the inner rings 32 of the adjacent bearings 3 through the balls 33 and the retainer 34, so that the preload force of the two bearings 3 is consistent.

The bearing 3 further comprises a dust protection groove 35. Dust protection groove 35 sets up on the outer lane 31 of bearing 3 towards the one side of inner circle 32, and the both ends of spacer 4 are provided with boss 41, and this boss 41 stretches into the dust protection groove 35 on outer lane 31, and the purpose that so sets up is in: on one hand, the positioning of the spacer 4 can be ensured; on the other hand, the concentricity of the spacer 4 and the two bearings 3 can be ensured, so that the bearings 3 and the motor shaft 1 are prevented from being blocked when being installed on the bearing sleeve 5 or packaged.

In order to prevent dust from entering the bearing 3 and affecting the service life of the bearing 3, a sealing ring is further arranged on the bearing 3, one end of the sealing ring is arranged in the dust-proof groove 35, and the other end of the sealing ring is abutted against the inner ring 32. In this embodiment, each bearing 3 is provided with two sealing rings, which are respectively disposed on two sides of the bearing 3 to prevent dust from entering between the outer ring 31 and the inner ring 32.

Referring to fig. 2, a high-speed motor 100 according to a second embodiment of the present invention has substantially the same structure as the first embodiment, except that: the bearing sleeve 5 is not arranged on the high-speed motor 100, and when the whole high-speed motor 100 is packaged, the bearing 3 is directly packaged on the outer side of the outer ring 31, so that the packaging method is simple and convenient.

In summary, the following steps: through adopting transition fit and filling the glue that has two kinds of states between clearance 2 with between bearing 3 and the axle, when can connecting motor shaft 1 and bearing 3, can also reduce the bad influence to bearing 3 precision of motor shaft 1 circularity. And, the utility model provides a two kinds of embodiments show high speed motor 100 when the complete machine factory encapsulates, the casing can be selected according to the overall dimension of high speed motor 100 in above-mentioned two kinds of embodiments to the producer, can guarantee the precision of high speed motor 100 complete machine, can avoid again because the difference of the size of bearing 3 and motor shaft 1 and need adjust the size of casing, simple structure, convenient and fast.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A high-speed motor is characterized by comprising a motor shaft, at least two bearings sleeved on the outer side of the motor shaft, wherein each bearing is provided with an inner circumferential surface arranged towards the outer circumferential surface of the motor shaft, a gap is formed between the inner circumferential surface of each bearing and the outer circumferential surface of the motor shaft, and the high-speed motor further comprises a connecting piece arranged in the gap to connect the motor shaft and the bearings.

2. The high-speed motor according to claim 1, wherein the connecting member is a solid member, and the connecting member includes a supporting member and adhesive members fixedly connected to the supporting member and disposed on both sides of the supporting member; or the connecting piece is an adhesive body.

3. A high speed electric motor according to claim 1, wherein said connection member has two states, said connection member being in a liquid state when filled into said gap and being solidified in a solid state at room temperature.

4. The high-speed motor according to claim 1, wherein each of the bearings includes an outer ring and an inner ring fitted in the outer ring and connected to the outer ring, and the high-speed motor further includes a spacer for connecting the outer rings of two adjacent bearings.

5. A high-speed electric motor according to claim 4, wherein bosses are provided at both ends of the spacer sleeve, the bosses extending into the outer ring.

6. The high-speed motor according to claim 5, wherein a dust-proof groove is provided on a side of the outer ring facing the inner ring, and the boss protrudes into the dust-proof groove.

7. The high-speed motor according to claim 6, wherein each of the bearings further includes a seal ring, one end of the seal ring is disposed in the dust-proof groove, and the other end of the seal ring abuts against the inner ring.

8. The high-speed electric machine of claim 4, wherein the bearing further comprises balls and a cage, the cage being disposed between the outer race and the inner race, the balls being mounted on the cage.

9. The high-speed electric machine of claim 8, wherein the cage is a glass fiber reinforced nylon cage.

10. The high-speed electric machine according to claim 1, further comprising a bearing housing provided outside the bearing.