CN214205154U

CN214205154U - External rotor motor with novel structure for treadmill

Info

Publication number: CN214205154U
Application number: CN202120272735.5U
Authority: CN
Inventors: 张刚; 丁德亮; 赵桂丽; 李树普; 李家涛
Original assignee: Wolong Electric Jinan Motor Co ltd; Wolong Electric Group Co Ltd
Current assignee: Wolong Electric Jinan Motor Co ltd; Wolong Electric Drive Group Co Ltd
Priority date: 2021-01-29
Filing date: 2021-01-29
Publication date: 2021-09-14
Anticipated expiration: 2031-01-29

Abstract

The utility model discloses an external rotor electric machine for new construction treadmill relates to the external rotor electric machine field. The outer rotor motor lead wire for the existing treadmill is worn out from the stator shaft hole, so that the processing difficulty of the shaft is large, the motor is provided with a front end cover and a rear end cover, and meanwhile, a sufficient electric gap is reserved for ensuring electric safety, so that the length of the motor is increased, and the motor is difficult to dissipate heat due to the sealing of the two end covers. The utility model discloses a rotor, stator, bearing and stator dabber, in the rotor was located to the stator, the one end of rotor set up the end cover, the other end of rotor is uncovered, one end and the end cover of stator dabber between pass through the bearing connect. The motor can effectively reduce the weight of the motor, improve the heat dissipation efficiency, facilitate the leading-out of the lead, avoid the complexity of the processing technology of the stator core shaft, effectively reduce the weight and the cost of the motor and simplify the manufacturing technology.

Description

External rotor motor with novel structure for treadmill

Technical Field

The utility model relates to an external rotor electric machine field especially relates to an external rotor electric machine for new construction treadmill.

Background

The outer rotor motor for the current treadmill adopts traditional structural design, and the lead wire is worn out from the stator shaft hole for the processing degree of difficulty increase of axle, mechanical strength reduce, purchasing cost rise, complete machine assembly process are complicated etc. two end covers in front and back will be used to the motor equipment motor in addition, leave sufficient electric clearance for guaranteeing electrical safety simultaneously, so make motor length increase, make the motor heat dissipation difficult because the closure of two end covers. The problems lead the products to have large volume, high cost, complex process, poor quality and insufficient performance.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model and the technical task who provides are perfect and improve prior art scheme, provide an external rotor electric machine for treadmill of new construction to reduce cost promotes the radiating efficiency as the purpose. Therefore, the utility model adopts the following technical scheme.

The outer rotor motor for the treadmill with the new structure comprises a rotor, a stator, a bearing and a stator core shaft, wherein the stator is arranged in the rotor, one end of the rotor is provided with an end cover, the other end of the rotor is open, and one end of the stator core shaft is connected with the end cover through the bearing. The one end of stator dabber is passed through the bearing and is connected with the end cover of rotor, realize unilateral support ground rotatable coupling between rotor and the stator, and it is uncovered at the other end of rotor, an end cover has been saved, electrical clearance and assembly space that the consideration set up the end cover have been avoided, motor length shortens, can effectively reduce motor weight, and because the one end of rotor is uncovered, compare in traditional external rotor electric machine for treadmill, can effectively promote the radiating efficiency, the radiating effect is better, also be convenient for the lead wire to draw forth, the problem of the lead wire of having avoided traditional external rotor electric machine to draw forth from the shaft hole of stator dabber, avoid the complexity of stator dabber processing technology, the structural strength of stator dabber has been promoted, can effectively reduce motor weight and cost, the simplified manufacturing process.

As a preferable technical means: the end cover and the shell of the rotor are of an integrated structure. Because one side of the rotor is open, the rotor shell and one end cover can be completely made into a part, the structural strength is enhanced, the number of parts is reduced, and the manufacturing process is simplified.

As a preferable technical means: and a connecting piece connected with a driving shaft of the treadmill is arranged on the outer side of the end cover. The connection with the driving shaft of the treadmill is conveniently realized.

As a preferable technical means: the connecting piece is an external thread piece and is matched with a driving shaft of the running machine through threads, and the connecting piece and the end cover are of an integrated structure. The connection is simple, convenient, stable and reliable.

As a preferable technical means: the inner side of the end cover is provided with 2 bearing chambers, the number of the bearings is 2, the outer rings of the 2 bearings are in interference fit with the inner wall of the bearing chamber, and the inner rings of the 2 bearings are in interference fit with the stator core shaft. The end cover through 2 bearings and rotor is connected, and unilateral supporting effect is better.

As a preferable technical means: the connecting piece is provided with a central hole which penetrates through the connecting piece in the axial direction. The weight of the motor can be reduced.

As a preferable technical means: and a gap is arranged between the inner diameter of the central hole and the stator core shaft. Interference is avoided.

As a preferable technical means: the end cover is provided with a plurality of radiating holes in a surrounding and uniform distribution mode. The weight can be reduced, the air circulation is convenient, and the heat dissipation is easier.

As a preferable technical means: the peripheral surface of the other end of the stator core shaft is provided with 1 plain section or 2 parallel plain sections, and the plain sections are parallel to the axis of the stator core shaft. The stator core shaft is convenient to connect and fix.

Has the advantages that: through the unilateral support between rotor and the stator, and it is uncovered at the other end of rotor, an end cover has been saved, the electric clearance and the assembly space of considering to set up the end cover have been avoided, motor length shortens, can effectively reduce motor weight, and because the one end of rotor is uncovered, compare in traditional external rotor electric machine for treadmill, can effectively promote the radiating efficiency, the radiating effect is better, the lead wire of also being convenient for is drawn forth, the problem of the lead wire of external rotor electric machine for traditional treadmill is drawn forth from the shaft hole of stator dabber has been avoided, avoid the complexity of stator dabber processing technology, the structural strength of stator dabber has been promoted, can effectively reduce motor weight and cost, the manufacturing process is simplified.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is another view-direction structure diagram of the present invention.

Fig. 3 is the motor structure schematic diagram after the rotor of the utility model is dissected.

In the figure: 1-a rotor; 2-a stator; 3-a stator mandrel; 4-a bearing; 5-end cover; 6-connecting piece; 301-plain section; 501-heat dissipation holes; 601-center hole.

Detailed Description

The technical solution of the present invention will be further described in detail with reference to the accompanying drawings.

As shown in fig. 1-3, an external rotor motor for a treadmill with a new structure comprises a rotor 1, a stator 2, a bearing 4 and a stator core shaft 3, wherein the stator 2 is arranged in the rotor 1, one end of the rotor 1 is provided with an end cover 5, the other end of the rotor 1 is open, and one end of the stator core shaft 3 is connected with the end cover 5 through the bearing 4.

The end cover 5 is of an integral structure with the housing of the rotor 1 for increased structural strength. Because rotor 1 one side is uncovered, can make rotor 1 shell and an end cover 5 into a part completely, strengthen structural strength, reduce part quantity, manufacturing process is more simplified.

To facilitate connection to the treadmill drive shaft, the outer side of the end cap 5 is provided with a connection member 6 to the treadmill drive shaft. The connection with the driving shaft of the treadmill is conveniently realized.

In order to connect stably and reliably, the connecting piece 6 is an external thread piece and is connected with the driving shaft of the treadmill through thread matching, and the connecting piece 6 and the end cover 5 are of an integral structure. The connection is simple, convenient, stable and reliable.

In order to realize better unilateral supporting effect, the inner side of the end cover 5 is provided with 4 chambers of bearings, the number of the bearings 4 is 2, the outer ring of the bearing 4 of each bearing 4 is in interference fit with the inner wall of the bearing 4 chamber, and the inner ring of the bearing 4 of each bearing 4 is in interference fit with the stator mandrel 3. Through 2 bearings 4 and rotor 1's end cover 5 are connected, unilateral supporting effect is better.

In order to reduce the weight of the motor, the connecting element 6 is provided with a central bore 601 running axially through. The weight of the motor can be reduced.

To avoid interference, a gap is provided between the inner diameter of the central hole 601 and the stator core shaft 3. Interference is avoided.

In order to facilitate heat dissipation, three heat dissipation holes 501 are uniformly distributed on the end cover 5 in a surrounding manner. The weight can be reduced, air circulation is facilitated, heat dissipation is easier, in this example, the heat dissipation holes 501 are waist-shaped, and the inner arcs and the outer arcs of the heat dissipation holes 501 are concentric with the periphery of the end cover 5.

In order to facilitate the connection and fixation of the

stator core shaft

3, 2 parallel planar sections 301 are arranged on the outer peripheral surface of the other end of the stator core shaft 3, and the planar sections 301 are parallel to the axis of the stator core shaft 3. The stator core shaft 3 is convenient to connect and fix.

The one end of stator dabber 3 is connected with end cover 5 of rotor 1 through bearing 4, realize unilateral support ground rotatable coupling between rotor 1 and the stator 2, and it is uncovered at the other end of rotor 1, an end cover has been saved, electrical clearance and assembly space that the consideration set up the end cover have been avoided, motor length shortens, can effectively reduce motor weight, and because 1 one end of rotor is uncovered, compare in traditional external rotor electric machine for treadmill, can effectively promote the radiating efficiency, the radiating effect is better, also be convenient for the lead wire to draw forth, the problem that the lead wire of having avoided traditional external rotor electric machine was drawn forth from the shaft hole of stator dabber 3, avoid the complexity of stator dabber 3 processing technology, the structural strength of stator dabber 3 has been promoted, can effectively reduce motor weight and cost, the simplified manufacturing process.

The external rotor motor for treadmill with new structure shown in fig. 1-3 above is a specific embodiment of the present invention, which has embodied the substantial features and progress of the present invention, and can be modified equally in the aspects of shape, structure, etc. according to the actual use requirement, all within the protection scope of the present solution.

Claims

1. The utility model provides an outer rotor electric machine for new construction treadmill, includes rotor (1), stator (2), bearing (4) and stator dabber (3), its characterized in that: the stator (2) is arranged in the rotor (1), one end of the rotor (1) is provided with an end cover (5), the other end of the rotor (1) is open, and one end of the stator core shaft (3) is connected with the end cover (5) through the bearing (4).

2. The external rotor motor for the treadmill of claim 1, wherein: the end cover (5) and the shell of the rotor (1) are of an integral structure.

3. The external rotor motor for the treadmill of claim 1, wherein: and a connecting piece (6) connected with a driving shaft of the running machine is arranged on the outer side of the end cover (5).

4. The external rotor motor for the treadmill of claim 3, wherein: the connecting piece (6) is an external thread piece and is matched with a driving shaft of the running machine through threads, and the connecting piece (6) and the end cover (5) are of an integral structure.

5. The external rotor motor for the treadmill of claim 4, wherein: end cover (5) inboard be equipped with bearing (4) room, bearing (4) 2 totally, bearing (4) outer lane and the indoor wall interference fit of bearing (4) of 2 bearing (4), bearing (4) inner circle and stator dabber (3) interference fit of 2 bearing (4).

6. The external rotor motor for the treadmill of claim 5, wherein: the connecting piece (6) is provided with a central hole (601) which axially penetrates through.

7. The external rotor motor for the treadmill of claim 6, wherein: a gap is arranged between the inner diameter of the central hole (601) and the stator core shaft (3).

8. The external rotor motor for the treadmill of claim 1, wherein: the end cover (5) is uniformly provided with a plurality of radiating holes (501) in a surrounding manner.

9. The external rotor motor for the treadmill of claim 1, wherein: the periphery of the other end of the stator core shaft (3) is provided with 1 plain section (301) or 2 parallel plain sections (301), and the plain sections (301) are parallel to the axis of the stator core shaft (3).