CN206283356U - End cover and motor - Google Patents
End cover and motor Download PDFInfo
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- CN206283356U CN206283356U CN201621204560.XU CN201621204560U CN206283356U CN 206283356 U CN206283356 U CN 206283356U CN 201621204560 U CN201621204560 U CN 201621204560U CN 206283356 U CN206283356 U CN 206283356U
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- end cap
- leg
- reinforcement
- lid
- intrinsic frequency
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- 230000002787 reinforcement Effects 0.000 claims description 50
- 230000003014 reinforcing effect Effects 0.000 claims description 19
- 230000001154 acute effect Effects 0.000 claims description 3
- 210000003205 muscle Anatomy 0.000 claims 1
- 238000004458 analytical method Methods 0.000 description 5
- 238000012360 testing method Methods 0.000 description 4
- 238000013016 damping Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000003754 machining Methods 0.000 description 2
- 230000003746 surface roughness Effects 0.000 description 2
- 241000883990 Flabellum Species 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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Abstract
The utility model provides an end cover and motor. The end cover comprises a cover body and a supporting leg, wherein one end of the supporting leg is connected with one side of the cover body, and the end cover further comprises a natural frequency adjusting part connected with the cover body or the supporting leg. Because the utility model provides a natural frequency regulation portion has been set up in the end cover, has consequently changed the structure of end cover, has improved the natural frequency of its each order mode, makes the running speed of the equipment (for example motor) of using this end cover can avoid the resonance point, has reduced noise decibel value and vibration value effectively, improves the customer experience greatly, reduces the not hard up potential safety hazard such as fastener that the vibration arouses, has simple structure, characteristics with low costs.
Description
Technical field
The utility model is related to mechanical field, more particularly to a kind of end cap and motor.
Background technology
Fig. 1 to Fig. 5 shows the structural representation of electric motor end cap of the prior art.As shown in Figures 1 to 5, existing skill
Electric motor end cap in art includes lid 1 and the leg 2 be connected with lid 1, and lid 1 is centrally formed with bearing block 9 and the position that is open
7.Leg 2 includes multiple reinforcing plates 5, is mutually separatedly set between these reinforcing plates 5.But, the end cap of this structure is consolidated
There is frequency to be likely located in the range of the normal revolution of motor, therefore, it is possible to larger resonance occur in motor operation course.
Utility model content
The utility model provides a kind of end cap and motor, to solve to occur altogether when end cap of the prior art has motion
The problem of hidden danger of shaking.
To solve the above problems, as one side of the present utility model, there is provided a kind of end cap, including lid and branch
Pin, one end of the leg is connected with the side of the lid, and the end cap also includes being connected with the lid or the leg
Intrinsic frequency adjustment portion.
Preferably, the leg includes at least two, and the intrinsic frequency adjustment portion includes the first reinforcement, described first
One end of reinforcement is connected with the two neighboring leg, another in the other end and the two neighboring leg
Individual connection.
Preferably, the side of the direction lid of first reinforcement is connected with the lid.
Preferably, first reinforcement is curved or linear.
Preferably, height of the height of first reinforcement less than or equal to the leg.
Preferably, thickness of the thickness of first reinforcement less than or equal to the leg.
Preferably, the intrinsic frequency adjustment portion includes the second reinforcement, and second reinforcement is arranged on the leg
Two reinforcing plates between and connect described two reinforcing plates.
Preferably, second reinforcement to the direction of the other end of the leg from extending at the top surface.
Preferably, height of the height of second reinforcement less than or equal to the leg.
Preferably, the leg includes 3 to 5 reinforcing plates, and one is passed through between the two neighboring reinforcing plate
The second reinforcement connection.
Preferably, the thickness of the reinforcing plate is 3 to 30mm.
Preferably, the angle between the axis of the leg and the lid is acute angle.
Preferably, the leg uses broken-line type structure or arcuate structure.
Preferably, the end cap also includes opening position reinforcement, and the lateral wall with the opening position of the lid is connected.
Preferably, the end cap also includes bearing chamber reinforcement, is protrusively provided the outside of the bearing block in the lid
On perisporium.
The utility model additionally provides a kind of motor, including above-mentioned end cap.
Due to being provided with intrinsic frequency adjustment portion in the end cap in the utility model, therefore the structure of end cap is changed, carried
The intrinsic frequency of its each rank mode high, avoids resonating using the running speed of the equipment (such as motor) of the end cap
Point, significantly reduces noise decibel value and vibration values, greatly improves customer experience, reduces the loosening such as fastener that vibration causes
Potential safety hazard, the characteristics of with simple structure, low cost.
Brief description of the drawings
Fig. 1 schematically shows a stereogram for angle of end cap of the prior art；
Fig. 2 schematically shows the stereogram of another angle of end cap of the prior art；
Fig. 3 schematically shows the top view of end cap of the prior art；
Fig. 4 schematically shows the C-C sectional views of Fig. 3；
Fig. 5 schematically shows the B-B sectional views of Fig. 3；
Fig. 6 schematically shows a stereogram for angle of the end cap in the utility model；
Fig. 7 schematically shows the stereogram of another angle of the end cap in the utility model；
Fig. 8 schematically shows the top view of the end cap in the utility model；
Fig. 9 schematically shows the C-C sectional views of Fig. 8；
Figure 10 schematically shows the B-B sectional views of Fig. 8；
Figure 11 schematically shows the schematic diagram of single-mode system；
Figure 12 schematically shows the schematic diagram of many-degrees of freedom system.
Reference in figure：1st, lid；2nd, leg；3rd, the first reinforcement；4th, the second reinforcement；5th, reinforcing plate；6th, it is open
Position reinforcement；7th, be open position；8th, bearing chamber reinforcement；9th, bearing block.
Specific embodiment
Embodiment of the present utility model is described in detail below in conjunction with accompanying drawing, but the utility model can be by right
It is required that the multitude of different ways for limiting and covering is implemented.
Refer to Fig. 6 to Figure 10, the end cap in the utility model, particularly a kind of electric motor end cap, including lid 1 and with institute
At least one leg 2 of the connection of lid 1 is stated, for example, can be one to four leg 2.One end of the leg 2 and the lid
The side connection of body 1, the end cap also includes the intrinsic frequency adjustment portion being connected with the lid 1 or the leg 2.
Due to being provided with intrinsic frequency adjustment portion in the end cap in the utility model, therefore the structure of end cap is changed, carried
The intrinsic frequency of its each rank mode high, avoids resonating using the running speed of the equipment (such as motor) of the end cap
Point, significantly reduces noise decibel value and vibration values, greatly improves customer experience, reduces the loosening such as fastener that vibration causes
Potential safety hazard, the characteristics of with simple structure, low cost.
Intrinsic frequency adjustment portion in the utility model can be some form of reinforcement, so, by intrinsic frequency
Adjustment portion can not only change intrinsic frequency, and can increase intensity.Wherein, the utility model can set an intrinsic frequency
Rate adjustment portion, it is also possible to which multiple intrinsic frequency adjustment portions are set.Certainly, the intrinsic frequency adjustment portion in the utility model can also
Using other structure types, as long as the purpose of regulation end cap intrinsic frequency can be reached.
In the embodiment shown in Fig. 6 to Figure 10, the intrinsic frequency adjustment portion in the utility model at least includes two
It is individual, respectively the first reinforcement 3 and the second reinforcement 4.
Fig. 6, Fig. 8 to Figure 10 are refer to, the first reinforcement 3 in the utility model is arranged between two neighboring leg 2,
Wherein, one end of the first reinforcement 3 is connected with one of leg 2, the other end is connected with another leg 2.In diagram
In embodiment, first reinforcement 3 is curved (now, the first reinforcement 3 can be flabellum shape), naturally it is also possible to be other shapes
Shape, such as linear etc..It is highly preferred that the outer surface of the side of the direction of the first reinforcement 3 lid 1 and the lid 1
Link into an integrated entity, preferably to improve intensity and regulation intrinsic frequency.The height of first reinforcement 3 can less than or wait
Change in the range of the height of the leg 2, its radial thickness can be in the scope of the thickness less than or equal to the leg 2
Interior change.
And for example, the second reinforcement 4 in the utility model is then arranged on the inside of the leg 2, for connecting leg 2 in
Two neighboring reinforcing plate 5, so, between the two neighboring reinforcing plate 5 of leg 2 set second reinforcement 4, it is at least
The side of the close lid 1 of the two reinforcing plates 5 is coupled together.It is highly preferred that one end of the second reinforcement 4 connects with lid 1
Connect, the other end then from extending to the direction of the other end of the leg 2 at the surface of the lid 1, its highly can less than or
Change equal in the range of the height of the leg 2.
For example, each leg 2 in the utility model may include multiple reinforcing plates 5 (such as 3 to 5), in the present embodiment
In, can be connected by second reinforcement 4 between any two neighboring reinforcing plate 5, the thickness of reinforcing plate 5 is then
Can be 3 to 30mm.
Additionally, in the embodiment shown in Fig. 5 to Figure 10, leg 2 uses broken-line type structure, itself and the lid 1
Axis between angle be acute angle.In other embodiments (not shown), the leg 2 in the utility model can also use arc
Shape structure.
In addition to the above-mentioned intrinsic frequency adjustment portion for changing end cap intrinsic frequency, the utility model can also take one
Improvement in a little structures, to improve intensity, solves the problems, such as that end cap Mechanical Structure Strength is not enough.
Preferably, the end cap also includes opening position reinforcement 6, and the lateral wall with the opening position 7 of the lid 1 is connected.
So, the utility model improves structural strength, therefore can preferably make by the increased reinforcement at the position of end cap opening
The influence of temperature change and installing force when being machined when end cap is from production, transporting and use.
Preferably, the end cap also includes bearing chamber reinforcement 8, be protrusively provided the lid 1 bearing block 9 it is outer
On the perisporium of side.Because the machining accuracy of bearing chamber is higher, bearing chamber reinforcement 8 is increased on the outside of bearing chamber, the portion can be strengthened
Point structural strength, effectively prevent machining and use during bearing chamber size is impacted, improve dimensional accuracy,
Improve service life and noise situations after bearing loads.The quantity of reinforcement, distribution and shape can change on the outside of bearing chamber
Become, it is highly preferred that the quantity of bearing chamber reinforcement 8 can be 1 to 36, can also be uniformly distributed circumferentially.Bearing chamber outside
The shape of reinforcement can be in bearing chamber external side parallel or not parallel (such as triangular pyramid type shape), front view for its section
Rectangle is trapezoidal etc..Reinforcement is except that can increase structural strength on the outside of bearing chamber, and then can also improve the chi in bearing chamber
Very little precision, because mechanical strength increases, the possibility of its size deformation by temperature change, installing force and other external causes is just small.
Additionally, the utility model can also increase closing lid face by way of the contact area and thickness that increase end cap closing lid
Product, so as to improve closing lid face and axial perpendicularity, reduce the influence of closing lid surface roughness, closing lid is more consolidated, improves
The axiality of end cap front and back bearings room, so that optimized dimensions chain, the mechanical strength that makes closing lid part is higher, end cover surface roughness
Influence with closing lid installing force is smaller, better assures that axiality therebetween, meanwhile, also fill the rotor assembly of motor
It is eccentric smaller after machine.
The utility model additionally provides a kind of motor, including above-mentioned end cap.The utility model is adjusted by intrinsic frequency
Portion not only increases the mechanical strength of end cap, and changes the intrinsic frequency of motor mode, reduces resonance.With reference to figure
11 to Figure 12, explanation is further explained to the utility model.
Inventor is in the utility model shown in the end cap of the prior art shown in Fig. 1 to Fig. 5 and Fig. 6 to Figure 10
End cap carried out respectively one, two, three rank Modal Analysis response distribution map, it is as a result as follows：
It can be seen that, its intrinsic frequency brings up to 1640Hz, 1958Hz, 2410Hz, mode point by 723Hz, 1068Hz, 1416Hz
Analyse the principle for calculating following (hereinafter：M is model quality, c damped coefficients, x vibration displacements, and a second dervative is that speed accelerates
Degree, k rigidity impedances, f damping forces).
Resonance is approached to driving frequency and the intrinsic frequency of end cap, vibration is increased caused phenomenon.Due to excitation frequency
Rate is it has been determined that therefore the utility model makes the two try one's best and avoid, to reach solution end cap by changing the intrinsic frequency of end cap
The purpose of the hidden danger that resonates.Wherein, intrinsic frequency is divided into single order, second order, three ranks etc., rule of thumb understands, the energy of first three rank is most
Greatly, therefore can assert that the intrinsic frequency of this three rank represents the intrinsic frequency of the end cap.With 10000,12000,14000rpm this three
As a example by individual driving frequency, motor 14000rpm rotating speeds, now, the total value of motor oscillating is big, energy is high, is badly in need of reducing, therefore with
These three rotating speeds high are mainly investigated in following analysis.
Wherein, motor speed divided by 60 value be noise of motor vibration under the rotating speed a frequency multiplication (14000/60=
233Hz), it can be seen from the test result according to noise of motor vibration, the noise and vibration peak value of tested motor appears in 1 frequency multiplication, 5.9
(6) frequency multiplication, 8 frequencys multiplication, i.e., be exactly 233Hz, 1374Hz, 1864Hz for the rotating speed of 14000rpm.
According to design requirement, it is necessary to reach these rotating speeds, thus end cap intrinsic frequency should try one's best it is many high more than these
The Frequency point of rotating speed, i.e., can only improve end cap intrinsic frequency.
First, by taking the single-degree-of-freedom viscous damping system shown in Figure 11 as an example, the motion side of its mechanics of system model
Formula is：
For free vibration, f=0 carries out pull-type conversion to formula both sides, can obtain：
ms2+ cs+k=0
Two roots of s can be solved by above formula,
In formula：The undamped inherent circular frequency of system, can obtain intrinsic frequency firm with structure by following formula
The relation of degree coefficient and quality；ζ is damping, is the factor that dimension is 1.
Secondly, in the N free degree Linear Time-Invariant Systems shown in Figure 12, N frees degree Linear Time-Invariant System is by N number of free degree
The combination of N number of single-degree-of-freedom is transformed into, its differential equation of motion is：
By Laplace transformation and matrixing, its Equation of Motion is：
(K-ω2+ j ω C) X (ω)=F (ω)
Known by Theory of Vibration, to linear time invariant system, any point of system is accordingly represented by each rank mode phase
The linear combination answered.Following formula is represented by the corresponding of l points, φ in formulalrIt is l-th test point, the vibration shape system of r rank mode
Number.
It is exactly intrinsic frequency by the ω of Matrix Solving, multiple degrees of freedom is actually that each quality and rigidity are transformed into square
Battle array, so as to obtain the intrinsic frequency of one, two, three ranks.
Model analysis above is calculated one, two, three rank Modal Analysis response distribution map and its intrinsic frequency of end cap,
1 rank modal frequency of the motor in the utility model brings up to 1640Hz, avoids the 6 frequencys multiplication correspondence of 10000~14000rpm
982~1385Hz of frequency range, while 2 rank modal frequency 1958Hz avoid 8 frequencys multiplication (1833Hz) Frequency point of 14000rpm.
It is that motor is carried out into noise testing more than to need the Frequency point evaded, and its test data after Fourier decomposition by obtaining
To the distribution of its frequency multiplication, professional etiquette should be entered from these frequencys multiplication to noise contribution highest through analyzing 1 frequency multiplication, 5.9 (6) frequencys multiplication, 8 frequencys multiplication
Keep away when rotating speed high (particularly).
Claims (17)
1. a kind of end cap, it is characterised in that including lid (1) and leg (2), one end and the lid (1) of the leg (2)
Side connection, the end cap also includes the intrinsic frequency adjustment portion that is connected with the lid (1) or the leg (2).
2. end cap according to claim 1, it is characterised in that the leg (2) including at least two, the intrinsic frequency
Adjustment portion includes in the first reinforcement (3), one end of first reinforcement (3) and the two neighboring leg (2)
Connection, the other end and another in the two neighboring leg (2) are connected.
3. end cap according to claim 2, it is characterised in that the direction lid (1) of first reinforcement (3)
Side is connected with the lid (1).
4. the end cap according to Claims 2 or 3, it is characterised in that first reinforcement (3) is curved or linear.
5. the end cap according to Claims 2 or 3, it is characterised in that the height of first reinforcement (3) is less than or equal to
The height of the leg (2).
6. the end cap according to Claims 2 or 3, it is characterised in that the thickness of first reinforcement (3) is less than or equal to
The thickness of the leg (2).
7. the end cap according to claim any one of 1-3, it is characterised in that the intrinsic frequency adjustment portion include second plus
Strong muscle (4), second reinforcement (4) is arranged between two reinforcing plates (5) of the leg (2) and connects described two adding
Strong plate (5).
8. end cap according to claim 7, it is characterised in that second reinforcement (4) is by the lid (1) surface
Direction to the other end of the leg (2) extends.
9. end cap according to claim 8, it is characterised in that the height of second reinforcement (4) is less than or equal to institute
State the height of leg (2).
10. end cap according to claim 7, it is characterised in that the leg (2) includes 3 to 5 reinforcing plates (5),
Connected by second reinforcement (4) between the two neighboring reinforcing plate (5).
11. end caps according to claim 7, it is characterised in that the thickness of the reinforcing plate (5) is 3 to 30mm.
12. end caps according to claim 1, it is characterised in that between the leg (2) and the axis of the lid (1)
Angle be acute angle.
13. end caps according to claim 1, it is characterised in that the leg (2) uses broken-line type structure or arc knot
Structure.
14. end caps according to claim 1, it is characterised in that the end cap also includes opening position reinforcement (6), with institute
State the lateral wall connection of opening position (7) of lid (1).
15. end caps according to claim 1, it is characterised in that the end cap also includes bearing chamber reinforcement (8), prominent
Be arranged in the outer perimeter wall of the bearing block of the lid (1) (9).
16. end cap according to claim any one of 8-10, it is characterised in that the thickness of the reinforcing plate (5) be 3 to
30mm。
17. a kind of motors, it is characterised in that including the end cap any one of claim 1 to 16.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621204560.XU CN206283356U (en) | 2016-11-08 | 2016-11-08 | End cover and motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621204560.XU CN206283356U (en) | 2016-11-08 | 2016-11-08 | End cover and motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206283356U true CN206283356U (en) | 2017-06-27 |
Family
ID=59083513
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621204560.XU Active CN206283356U (en) | 2016-11-08 | 2016-11-08 | End cover and motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206283356U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106533019A (en) * | 2016-11-08 | 2017-03-22 | 珠海格力电器股份有限公司 | end cover and motor |
-
2016
- 2016-11-08 CN CN201621204560.XU patent/CN206283356U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106533019A (en) * | 2016-11-08 | 2017-03-22 | 珠海格力电器股份有限公司 | end cover and motor |
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