CN215186319U

CN215186319U - Positioning structure of rotating shaft axial detection piece and motor

Info

Publication number: CN215186319U
Application number: CN202121561661.3U
Authority: CN
Inventors: 郭伟林; 张芳; 龚高; 周祖豪; 刘子彬; 邓明星
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2021-07-09
Filing date: 2021-07-09
Publication date: 2021-12-14
Anticipated expiration: 2031-07-09

Abstract

The utility model provides a location structure of pivot axial detection piece, motor, location structure wherein, including the pivot, the pivot includes first shaft section and the second shaft section of adjacent setting along its axial, and the diameter of second shaft section is greater than the diameter of first shaft section, along the axial by first shaft section to second shaft section, and the cover is equipped with threaded fastener, first gasket, axial detection piece, second gasket adjacently in proper order on the first shaft section, and one side that axial detection piece was kept away from to the second gasket is adjoined with the terminal surface of second shaft section orientation first shaft section. According to the utility model discloses, distance between the terminal surface of threaded fastener and second shaft section remains unchanged to can guarantee that rotor dynamic balance is not destroyed because of the dismantlement of motor, and then effectively stop the motor vibration phenomenon production that produces from this.

Description

Positioning structure of rotating shaft axial detection piece and motor

Technical Field

The utility model belongs to the technical field of the motor is made, concretely relates to location structure, motor that pivot axial detects piece.

Background

As the state promotes the industrial upgrading, the motor field continuously develops towards high speed and miniaturization, and along with the gradual rise of the power and the rotating speed of the motor, the stability of the rotor in the high-speed operation process has very important influence on the electromagnetic performance and the vibration noise of the motor, so that the whole system provides higher requirements for the dynamic balance of the rotor.

In the known motor at the present stage, interference fit is adopted between an axial detection device and a main shaft, the axial detection device is required to be sleeved into the shaft in a hot mode, and the axial detection device is required to be quickly matched on the main shaft after being preheated because a guide part of the axial detection device is small and the heat rate is high; in the related art, the axial sensor (i.e. the axial detecting element) has a linear interval between a detection signal and a distance, a gasket is arranged between the axial detecting element and the rotating shaft to position an axial position of the axial detecting device, so as to ensure that the distance between the axial detecting device and the axial sensor is within the linear interval, and no gasket is arranged between the precision nut and the axial detecting device, when the motor is assembled, an axial position of the stator element has an error, in order to ensure the distance between the axial detecting device and the sensor, the gasket is also used to make the axial position of the axial detecting device have a margin for subsequent adjustment, and in order to eliminate the axial assembly error of the stator element of the motor, the axial position of the axial detecting element needs to be adjusted within a certain range, the adjustment process needs to change the thickness of the gasket, and after the gaskets with different thicknesses are adjusted, the axial position of the precision nut will change, that is, it cannot be guaranteed that the precision nut can be screwed to the same position as before, so that the dynamic balance of the rotor is damaged after adjustment, and the motor is seriously vibrated.

SUMMERY OF THE UTILITY MODEL

Therefore, the utility model provides a location structure, the motor of pivot axial detection piece can overcome among the correlation technique axial displacement of taking place of threaded fastener at the motor dismouting in-process and destroy the rotor dynamic balance and then lead to the serious not enough of motor vibrations.

In order to solve the problem, the utility model provides a pivot axial detects location structure of piece, which comprises a rotating shaft, the pivot includes along the adjacent first shaft section and the second shaft section that sets up of its axial, the diameter of second shaft section is greater than the diameter of first shaft section, along by first shaft section axial of second shaft section, adjacent ground cover is equipped with threaded fastener, first gasket, axial detection piece, second gasket in proper order on the first shaft section, the second gasket is kept away from one side of axial detection piece with the second shaft section orientation the terminal surface of first shaft section borders on.

Preferably, the first shaft section is provided with a boss adjacent to the second shaft section, the boss is cylindrical and coaxial with the first shaft section, the axial detection piece and the second gasket are sleeved on the peripheral wall of the boss, and the diameter of the boss is smaller than that of the second shaft section.

Preferably, the axial detection member is in clearance fit with the boss.

Preferably, the axial direction detection piece is provided with a first through hole sleeved with the boss, the matching length of the first through hole and the boss is La, the axial thickness of the second gasket is d, the axial length of the boss is Lb, and La + d is greater than Lb.

Preferably, the axial direction detecting member further has a detecting portion located at an outer periphery of the first through hole, the detecting portion has a detecting surface facing one side of the second shaft section, the detecting surface is configured with a ring groove, the ring groove is coaxially arranged with the first through hole and located at an orifice of the first through hole, a diameter of an outer ring wall of the ring groove is larger than a diameter of the second shaft section, and the second gasket is located in the ring groove.

Preferably, a first rotation-preventing structure is arranged between the first through hole and the boss to prevent the axial detection piece and the rotating shaft from generating relative displacement in the circumferential direction of the rotating shaft; and/or a second anti-rotation structure is arranged between the second through hole of the second gasket and the boss so as to prevent the second gasket and the rotating shaft from generating relative displacement in the circumferential direction of the rotating shaft.

Preferably, the first rotation-preventing structure comprises a first protrusion arranged on the wall of the first through hole and a first groove arranged on the outer peripheral wall of the boss; or, first anti-rotation structure including set up in first recess on the pore wall of first through-hole and set up in first arch on the periphery wall of boss.

Preferably, the second rotation-preventing structure comprises a second protrusion arranged on the wall of the second through hole and a second groove arranged on the outer peripheral wall of the boss; or the second anti-rotation structure comprises a second groove formed in the hole wall of the second through hole and a second protrusion formed in the outer peripheral wall of the boss.

Preferably, when the first groove and the second groove are simultaneously arranged on the boss, the first groove and the second groove penetrate through to form a straight groove, and the straight groove extends along the axial direction of the rotating shaft.

The utility model also provides a motor, including the location structure of foretell pivot axial detection piece.

The utility model provides a pair of location structure, motor of pivot axial detection piece the axial both sides of axial detection piece set up first gasket and second gasket respectively to can select the first gasket and the second gasket of suitable thickness according to the concrete model of motor, thereby can guarantee threaded fastener is right after the preset power has been applyed to first gasket, threaded fastener with the second shaft section orientation distance between the terminal surface of first shaft section keeps unchangeable, also promptly threaded fastener is in the axial position around the motor is dismantled keeps unanimous and does not change, thereby can guarantee that rotor dynamic balance is not destroyed because of the dismantlement of motor, and then effectively stop the motor vibrations phenomenon production that produces from this.

Drawings

Fig. 1 is a schematic structural view (cross-sectional view) of a positioning structure of a rotating shaft axial direction detecting member according to an embodiment of the present invention;

fig. 2 is a schematic perspective view of a positioning structure of the axial detecting element of the rotating shaft according to an embodiment of the present invention;

fig. 3 is a schematic perspective view of a positioning structure of a rotating shaft axial direction detecting member according to another embodiment of the present invention;

fig. 4 is a schematic perspective view of a positioning structure of a rotating shaft axial direction detecting element according to another embodiment of the present invention.

The reference numerals are represented as:

1. a rotating shaft; 11. a first shaft section; 12. a second shaft section; 13. a boss; 21. a threaded fastener; 22. a first gasket; 23. an axial detection member; 231. a first through hole; 232. detecting a surface; 233. a ring groove; 24. a second gasket; 241. a second through hole; 31. a first protrusion; 32. a first groove; 41. a second protrusion; 42. a second groove; 5. straight grooves.

Detailed Description

With reference to fig. 1 to 4 in combination, according to the embodiment of the present invention, a positioning structure of a rotating shaft axial direction detecting element is provided, including a rotating shaft 1, the rotating shaft 1 includes a first shaft section 11 and a second shaft section 12 (which can be understood as both being coaxially disposed) disposed along the axial direction thereof, the diameter of the second shaft section 12 is greater than the diameter of the first shaft section 11, so as to form a positioning shoulder on one side of the second shaft section 12 facing the first shaft section 11, and along the axial direction from the first shaft section 11 to the second shaft section 12, a threaded fastener 21 (for example, a precision nut in the prior art), a first gasket 22, and an axial direction detecting element 23 (an axial direction displacement detecting element such as a specific sensor (not shown in the figure) can be sequentially and adjacently sleeved on the first shaft section 11, so as to detect the axial direction of the rotating shaft 1 in real time), and the positioning structure can detect the axial direction of the rotating shaft 1 in real time, A second gasket 24, a side of the second gasket 24 away from the axial direction detecting member 23 is adjacent to an end surface of the second shaft segment 12 facing the first shaft segment 11, the threaded fastener 21 and the end surface of the second shaft segment 12 facing the first shaft segment 11 together form a clamp for the first gasket 22, the axial direction detecting member 23 and the second gasket 24, so as to form an axial direction and a circumferential direction positioning for the axial direction detecting member 23, either the first gasket 22 or the second gasket 24 can be replaced, that is, according to the actual situation of the motor, the first gasket 22 and the second gasket 24 can be respectively replaced by gaskets with different thicknesses, so as to ensure that the axial position of the threaded fastener 21 after applying a preset force (which is a known amount) to the first gasket 22 is kept unchanged. In the technical scheme, the first gasket 22 and the second gasket 24 are respectively arranged on two axial sides of the axial detection piece 23, so that the first gasket 22 and the second gasket 24 with proper thicknesses can be selected according to specific models of motors, and it can be ensured that after the threaded fastener 21 exerts a preset force on the first gasket 22, the distance between the threaded fastener 21 and the end surface of the second shaft section 12 facing the first shaft section 11 is kept unchanged, that is, the axial positions of the threaded fastener 21 before and after the motor is disassembled are kept consistent and do not change, so that the dynamic balance of a rotor can be ensured not to be damaged due to the disassembly of the motor, and the motor vibration phenomenon generated thereby is effectively avoided.

In some embodiments, the first shaft segment 11 has a boss 13 adjacent to the second shaft segment 12, the boss 13 is cylindrical and coaxial with the first shaft segment 11, the axial detection member 23 and the second gasket 24 are sleeved on the outer peripheral wall of the boss 13, the diameter of the boss 13 is smaller than that of the second shaft segment 12, the axial detection member 23 has a first through hole 231 sleeved with the boss 13, and the diameter of the first through hole 231 needs to match with the boss 13, that is, is larger than that of the first shaft segment 11, so as to effectively prevent the threaded section (the portion in threaded connection with the threaded fastener 21) on the first shaft segment 11 from being damaged during the sleeving process of the axial detection member 23. Preferably, the axial detecting piece 23 is in clearance fit with the boss 13, the clearance value of the clearance fit is delta, delta is greater than 0mm and less than or equal to 0.03mm, and the positioning and assembling process of the axial detecting piece 23 is greatly facilitated by a hot-assembling mode in the related art.

The matching length of the first through hole 231 and the boss 13 is La, the axial thickness of the second gasket 24 is d, the axial length of the boss 13 is Lb, and La + d > Lb, so that the first gasket 22 can be in direct contact with the side surface of the axial detection piece 23, and the axial positioning of the axial detection piece 23 by the threaded fastener 21 is more reliable.

The axial direction detecting member 23 further has a detecting portion disposed at the outer periphery of the first through hole 231, the detecting portion has a detecting surface 232 facing one side of the second shaft section 12, since the processing accuracy of the detecting surface 232 directly affects the detecting accuracy of the detecting surface and the corresponding axial displacement detecting member, so the flatness processing of the detecting surface 232 is extremely high, and the protection of the detecting surface 232 is also important, therefore, in some embodiments, the detecting surface 232 is configured with a ring groove 233, the ring groove 233 is disposed coaxially with the first through hole 231 and at the hole opening of the first through hole 231, the diameter of the outer ring wall of the ring groove 233 is larger than the diameter of the second shaft section 12, and the second gasket 24 is disposed in the ring groove 233, so that, on the one hand, the area of the detecting surface 232 which needs to be processed with high precision is reduced, this can reduce the manufacturing cost caused by machining, and on the other hand, the second gasket 24 is disposed in the annular groove 233 while contacting with the axial direction detecting member 23 and the end surface of the second shaft section 12, thereby avoiding the abrasion damage caused by the direct contact between the detecting surface 232 and the end surface of the second shaft section 12 during the assembling and disassembling process of the rotating shaft.

In the prior art, there is no circumferential limiting device between the axial detection piece 23 and the rotating shaft 1, when the precision nut is tightened, the axial detection piece 23 rotates along with the rotation of the precision nut, even if a position mark is made between the axial detection piece 23 and the rotating shaft 1, the mark of the axial detection piece cannot be aligned with the corresponding mark of the rotating shaft 1 by one hundred percent, so that the dynamic balance of the rotor is damaged when the motor is disassembled and assembled every time, which leads to serious vibration of the motor, in order to overcome this defect, in some embodiments, a first anti-rotation structure is provided between the first through hole 231 and the boss 13 to prevent the axial detection piece 23 and the rotating shaft 1 from generating relative displacement in the circumferential direction of the rotating shaft 1; and/or a second anti-rotation structure is arranged between the second through hole 241 of the second gasket 24 and the boss 13 to prevent the second gasket 24 and the rotating shaft 1 from generating relative displacement in the circumferential direction of the rotating shaft 1.

As a specific implementation manner of the first anti-rotation structure, the first anti-rotation structure includes a first protrusion 31 disposed on the hole wall of the first through hole 231 and a first groove 32 disposed on the outer circumferential wall of the boss 13; alternatively, the first rotation-preventing structure includes a first groove 32 disposed on the hole wall of the first through hole 231 and a first protrusion 31 disposed on the outer peripheral wall of the boss 13. As a specific implementation manner of the second anti-rotation structure, the second anti-rotation structure includes a second protrusion 41 disposed on the hole wall of the second through hole 241 and a second groove 42 disposed on the outer circumferential wall of the boss 13; alternatively, the second rotation-preventing structure includes a second groove 42 disposed on the hole wall of the second through hole 241 and a second protrusion 41 disposed on the outer circumferential wall of the boss 13. When the first groove 32 and the second groove 42 are simultaneously arranged on the boss 13, the first groove 32 and the second groove 42 penetrate through to form the straight groove 5, and the straight groove 5 extends along the axial direction of the rotating shaft 1, so that the forming process of related parts is simplified.

The first protrusion 31 and the first groove 32, and the second protrusion 41 and the second groove 42 are respectively and correspondingly arranged, generally speaking, a plurality of protrusions are evenly arranged along the circumference of the rotating shaft 1 at intervals to ensure the dynamic balance of the rotating shaft 1. The specific shape of the first groove 32 and the second groove 42 may be various, and suitable shapes such as a straight strip shape, an L shape, etc. may be adopted.

According to the utility model discloses an embodiment still provides a motor, including foretell pivot axial detection piece's location structure.

It is readily understood by a person skilled in the art that the advantageous ways described above can be freely combined, superimposed without conflict.

The above description is only exemplary of the present invention and should not be construed as limiting the present invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention are intended to be included within the scope of the present invention. The above is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.

Claims

1. The utility model provides a location structure of pivot axial detection piece, its characterized in that, includes pivot (1), pivot (1) is including first shaft segment (11) and second shaft segment (12) along its axial adjacent setting, the diameter of second shaft segment (12) is greater than the diameter of first shaft segment (11), along by first shaft segment (11) to the axial of second shaft segment (12), adjacent suit is equipped with threaded fastener (21), first gasket (22), axial detection piece (23), second gasket (24) in proper order on first shaft segment (11), second gasket (24) are kept away from one side of axial detection piece (23) with second shaft segment (12) orientation the terminal surface of first shaft segment (11) is adjoined.

2. The positioning structure according to claim 1, wherein the first shaft section (11) has a boss (13) adjacent to the second shaft section (12), the boss (13) is cylindrical and coaxial with the first shaft section (11), the axial detection member (23) and the second gasket (24) are sleeved on the outer peripheral wall of the boss (13), and the diameter of the boss (13) is smaller than that of the second shaft section (12).

3. An arrangement according to claim 2, characterized in that the axial detection member (23) is a clearance fit with the boss (13).

4. The positioning structure according to claim 2, wherein the axial direction detector (23) has a first through hole (231) fitted with the boss (13), the fitting length of the first through hole (231) and the boss (13) is La, the axial thickness of the second spacer (24) is d, the axial length of the boss (13) is Lb, and La + d > Lb.

5. The positioning structure according to claim 4, wherein the axial direction detecting member (23) further has a detecting portion at an outer periphery of the first through hole (231), the detecting portion has a detecting surface (232) facing a side of the second shaft section (12), the detecting surface (232) is configured with a ring groove (233), the ring groove (233) is disposed coaxially with the first through hole (231) and at an orifice of the first through hole (231), a diameter of an outer ring wall of the ring groove (233) is larger than a diameter of the second shaft section (12), and the second gasket (24) is disposed in the ring groove (233).

6. The positioning structure according to claim 4, wherein a first rotation preventing structure is provided between the first through hole (231) and the boss (13) to prevent relative displacement of the axial direction detecting member (23) and the rotary shaft (1) in the circumferential direction of the rotary shaft (1); and/or a second anti-rotation structure is arranged between a second through hole (241) of the second gasket (24) and the boss (13) to prevent the second gasket (24) and the rotating shaft (1) from generating relative displacement in the circumferential direction of the rotating shaft (1).

7. The structure according to claim 6, characterized in that the first rotation-preventing structure comprises a first protrusion (31) provided on the wall of the first through-hole (231) and a first recess (32) provided on the outer peripheral wall of the boss (13); or the first anti-rotation structure comprises a first groove (32) arranged on the hole wall of the first through hole (231) and a first protrusion (31) arranged on the peripheral wall of the boss (13).

8. The structure according to claim 6 or 7, characterized in that the second anti-rotation structure comprises a second protrusion (41) provided on the wall of the second through hole (241) and a second recess (42) provided on the peripheral wall of the boss (13); or the second anti-rotation structure comprises a second groove (42) arranged on the hole wall of the second through hole (241) and a second protrusion (41) arranged on the outer peripheral wall of the boss (13).

9. The positioning structure according to claim 8, wherein when the first groove (32) and the second groove (42) are simultaneously disposed on the boss (13), the first groove (32) and the second groove (42) are penetrated to form a straight groove (5), and the straight groove (5) extends along the axial direction of the rotating shaft (1).

10. An electric machine comprising a positioning structure of a rotating shaft axial direction detecting member, characterized in that the positioning structure of the rotating shaft axial direction detecting member is the positioning structure of the rotating shaft axial direction detecting member according to any one of claims 1 to 9.