CN104253503B - Motor, especially motor - Google Patents
Motor, especially motor Download PDFInfo
- Publication number
- CN104253503B CN104253503B CN201410284473.9A CN201410284473A CN104253503B CN 104253503 B CN104253503 B CN 104253503B CN 201410284473 A CN201410284473 A CN 201410284473A CN 104253503 B CN104253503 B CN 104253503B
- Authority
- CN
- China
- Prior art keywords
- cable
- motor
- bearing cap
- lower half
- fixing part
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000009413 insulation Methods 0.000 claims abstract description 24
- 230000006835 compression Effects 0.000 claims description 11
- 238000007906 compression Methods 0.000 claims description 11
- 230000005611 electricity Effects 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 4
- 239000000428 dust Substances 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 claims 1
- 229920003023 plastic Polymers 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 238000004873 anchoring Methods 0.000 description 2
- 230000008595 infiltration Effects 0.000 description 2
- 238000001764 infiltration Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000004308 accommodation Effects 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012777 electrically insulating material Substances 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 229910052738 indium Inorganic materials 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G3/00—Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
- H02G3/02—Details
- H02G3/08—Distribution boxes; Connection or junction boxes
- H02G3/081—Bases, casings or covers
- H02G3/083—Inlets
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/22—Auxiliary parts of casings not covered by groups H02K5/06-H02K5/20, e.g. shaped to form connection boxes or terminal boxes
- H02K5/225—Terminal boxes or connection arrangements
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Power Engineering (AREA)
- Motor Or Generator Frames (AREA)
Abstract
The present invention relates to a kind of motors, and with motor shell, the motor shell has the bearing cap for being placed on end side, wherein cable is directed in the motor between motor shell and bearing cap.For the cable holding in cable fixing part, the cable fixing part clamps the insulation crust of the cable.
Description
Technical field
The present invention relates to a kind of according to the motor as described in the preamble of claim 1, especially motor.
Background technique
The known motor with motor shell is disposed with the coil that a row can be powered, the coil on its medial surface
It is arranged in groups around the drop-center for accommodating rotor.It is the coil that starter is formed together with motor shell by cable
It is powered, the cable guides the line to enclosure interior between the end side of motor shell and the bearing cap placed on end side
Circle.
It should be noted that the high pulling force not allowed not act in the assembly of motor and in motor running
Onto cable, this will lead to damage cable or cable promoted to deviate from from its anchoring section on motor.
Summary of the invention
Task of the invention lies in so construct motor using the simple measure of structure, so that the electricity for power supply
Cable is reliably held on motor shell.
According to the present invention, the task is solved using feature described in claim 1.Dependent claims illustrate advantageous
Improvement project.
Such as it can be used as motor that servo motor or generator in motor vehicle use and there is shell and can be in end side
The bearing cap being placed on shell can be connected by motor described in the bearing cap with the vehicle body of other components, such as vehicle
It connects.Coil is installed in motor, is the coil power supply by cable.A part of the stator of coil especially motor, and
And it is located on the inner wall of motor shell.When necessary, cable also can be used in the coil on the armature for the rotation in motor
Electric current voltage in other words is supplied, wherein the fairing for electric current transmission and electric current commutation is located at end and the armature of cable
Coil between.
Cable holding is in the cable fixing part being arranged between motor shell and bearing cap.The cable fixing part clamps
The insulation crust of cable, and the insulation crust is fixed along the axis direction of cable.The thus cable fixing part receiving effect
Pulling force on to cable, and the pulling force is continued to be transmitted to motor shell in other words on bearing cap.It thus avoids in shell
Internal cable from its anchoring section deviate from other words with conductive member, than such as contact convex shoulder contact in deviate from, pass through institute
Stating contact convex shoulder is coil power supply.Cable fixing part is configured to sufficiently stable and sufficiently large clamping force is applied to cable
Insulation crust on, to be fixed on cable fixing part so that it is common, go out in assembly or at runtime
The existing pulling force being applied on cable is reliably transmitted in shell.
It is furthermore possible to that receiving portion in cable fixing part is advantageously designed to sealing, especially Fluid Sealing, from
And foul or moisture is prevented to be immersed in enclosure interior via the receiving portion in cable fixing part.
Cable needed for cable fixing part accommodates all three power supplies.Receiving portion for each cable constructs in the same manner,
And it is clamped in the corresponding cable in insulation crust region.
The insulation crust of each cable is made of electrically insulating material, especially plastics, and advantageous by least one
Formfitting element, such as compression floor (Pressrippe) are clamped in cable fixing part.The compression floor is by cable
It is embedded into insulation crust when being encased in cable fixing part, so that the axis direction along cable is fixed in insulation crust and cable
Shape between part is cooperatively connected.Compressing floor can extend or according to alternative embodiment in the whole circumference of cable
The section for being only multiple sawtooth portions radially-inwardly protruded into the receiving portion of cable fixing part in a other, such as form
Upper extension.
The inner wall that floor radially protrudes receiving portion is compressed, wherein the size of so radial protruding portion of measurement, thus
Insulation crust is permeated, only partially radially to avoid the insulation crust even damage of conductive wire.Advantageously, with certain
Multiple compression floors or similar formfitting element is arranged in axial spacing on cable fixing part, thus by axial fixation
Power is assigned on different axial positions.
Substitution will compress floor, and formfitting element is embedded into the insulation crust of cable in other words, it is also contemplated that not
It is embedded in insulation crust and is clamped in the case where not damaging insulation crust.Such as the receiving portion in cable fixing part can be set
There is the surface of enhancing frictional force, wherein applying the clamping force of axial restraint cable for the cable in receiving portion.
According to a kind of advantageous embodiment, construct to cable fixing part two parts, and including top half and lower half
Part accommodates cable between the top half and the lower half portion.Top half and lower half portion, which respectively constitute, to be used for
A part of the receiving portion of cable, the cable is advantageously surround in the surrounding portion of being received in the assembled state, so as to reality
Close connection and uniform force distribution between present cable fixing part and the insulation crust of cable.It is advantageous that the upper half
Divide and lower half portion is respectively provided with a semicircular receiving portion, described accommodation section combines form each electricity in the assembled state
Cable, ring seal receiving portion.
Motor shell is connect in other words with bearing cap for the top half and lower half portion, and especially distinguishes shape cooperation
Motor shell couples in other words for ground and bearing cap.Herein advantageously radially, along the circumferential direction and based in motor shell
The structure in gap between body and bearing cap also forms shape along the axial direction of motor and is cooperatively connected.Such as by with lower section
Formula realizes that the shape is cooperatively connected, that is, is inserted into the top half of the groove in bearing cap according to slot-spring principle (Nut-
Feder-Prinzip) there is protrusion outstanding along one or more outside, the protrusion extend into bearing cap, limit
Determine in the slot attached in the wall of groove.Here, the holding convexed to form with top half Construction integration in top half
Floor.Pin of the lower half portion connecting with motor shell for example with prominent outside pin in other words, the pin is in other words
Pin is extend into the groove attached on the end side of motor shell.
Advantageously, top half and lower half portion mutually shape-ordinatedly connect in the assembled state.For this purpose, upper
The formfitting element being mutually embedded in is respectively equipped in half part and lower half portion, wherein the formfitting element for example constructs
For elasticity the portion that is clamped and connected (Clipverbindung), wherein passing through the bullet on the clamping lock hook moving parts on another component
Property clamping element, until reaching the latched position between clamping element and clamping lock hook.
The motor shell is configured to metal shell, and bearing cap is for example made of aluminum.The cable fixing part preferable configuration
At plastic member.
The motor is, for example, permasyn morot.
Detailed description of the invention
The advantages of can be derived that other from other claims, drawings, description and drawings and advantageous embodiment.
Attached drawing is shown:
Fig. 1 is the perspective view of motor, is the motor by three cables；
Fig. 2 is the interception section enlarged drawing that cable imported into the region in the motor shell of motor；
Fig. 3 shows motor shell and the bearing cap for being placed on end side with exploded view, and the bearing cap has for holding
Receive cable, two-part cable support；
Fig. 4 shows two parts of cable support with the diagram amplified, and the cable support, which has, is located in the middle cable；
Fig. 5 is the sectional view of the motor shell and bearing cap in the region of cable support.
Identical component is equipped with identical appended drawing reference in the accompanying drawings.
Specific embodiment
Motor 1 is shown in FIG. 1, the motor is for example configured to permasyn morot, and can be such as
In a motor vehicle as servo motor application.Motor 1 has motor shell 2, is disposed on the end side of the motor shell
Bearing cap 3 can be connect by the bearing cap motor 1 with other components, such as automobile body or gear box casing.
Protruding portion 8 with fixed groove is located on bearing cap 3, by the fixed groove can by bearing cap 3 and other components into
Row is fixed.The fix eyelet (Befestigungsaugen) being radially outward directed, institute are disposed on the end side of motor shell 2
Fix eyelet is stated using fixed groove to center in protruding portion 8 into bearing cap, and by bearing cap and motor shell into
Row is connected with each other.
Drop-center is encased in bearing cap 3, the motor drive shaft 4 of motor passes through the drop-center to be connected to other
Component, on such as driving member.The bearing block of the bearing for accommodating motor drive shaft 4 is formed in bearing cap 3.The bearing
Lid 3 is preferably made of aluminium.
Be powered by cable 5a, 5b, 5c, the cable connect on the side away from motor 1 with plug connector 6 with
Just it is for example connected on power electronic part.Described cable 5a, 5b, 5c are accommodated in motor-side and are maintained at cable fixing part 7
On, the cable fixing part is inserted between motor shell 2 and bearing cap 3, and is connect securely with motor 1.Groove 9
(Fig. 3) is encased in bearing cap 3, and the cable fixing part 7 is inserted into the groove.
As Fig. 1 combination other accompanying drawings it can be concluded that as, cable fixing part 7 is configured to two parts, and including upper
Half part 7a and lower half portion 7b, the top half and the lower half portion can be shape-ordinatedly mutually inserted.Respectively will
Semicircular cable passage 10a, 10b be encased in top half 7a and lower half portion 7b, and the cable passage is assembling
The receiving portion circular on the whole for being used for each cable 5a, 5b, a 5c is formed under state.The top half 7a and lower half portion
7b is respectively provided with three cable passage 10a, 10b be mutually juxtaposed, semicircular.
It realizes that the shape between top half 7a and lower half portion 7b cooperates by formfitting element 11a, 11b to connect
It connects, lower half portion integrally constructs the formfitting element in other words with corresponding top half.In the top half 7a
On formfitting element 11a be configured to retaining clip, construct to the retaining clip spring, and in the position assembled
The clamping lock protrusion 11b on the lower half portion 7b is shape-ordinatedly surrounded to snap fit in other words.
In addition, motor case 2 shape-ordinatedly connects in other words by each section 7a, 7b and bearing cap 3 of cable fixing part 7
It connects.With this end in view, the top half 7a has on its outer lateral surface keeps floor 12, and the prominent outside of the holding floor is simultaneously
And it is shape-ordinatedly extend into the slot attached in the wall that groove 9 is limited in bearing cap 3.Keep floor 12 in the upper half
The lateral surface of point 7a extends on upper side over the entire length in other words, and when necessary also can also be at two of top half
Extend on end side.
By lower half portion 7b, towards the pin on the outside of motor shell 2, pin 13 is realized in lower half in other words
The shape divided between 7b and motor shell 2 is cooperatively connected, and the wherein pin 13 extend into attaching on the end side of motor shell 2
Groove 14 in.
Every cable 5 by insulation crust 15 and be configured to conducting wire 16, conductive core forms.In order to which cable 5 is fixed
In cable fixing part 7, cable passage 10a, 10b in top half and lower half portion are inserted the cable into assembly
In, and be then shape-ordinatedly connected with each other top half and lower half portion by formfitting element 11a, 11b.It is described
Top half and lower half portion are shape-ordinatedly inserted into the groove 9 between motor shell 2 and bearing cap 3, and free
Wire termination 16 contacts convex shoulder with connection convex shoulder inside motor shell in other words and is electrically connected.
Insulation crust 15 is made of the plastic material being electrically insulated, and is clamped in cable passage 10a, 10b, and by
This is fixed along the axis direction of cable.By compressing floor 17a, 17b(Fig. 5) it realizes and fixes, the compression floor is encased in
In cable passage 10a, 10b in top half 7a in other words lower half portion 7b.Described compression floor 17a, 17b have gradually
In the cross section to come to a point and the insulation crust 15 for being embedded into cable in assembly.It can be learnt such as from Fig. 5 advantageously,
Both the compression floor of two parallel, axial separation distances from each other had been respectively arranged in top half 7a or in the 7b of lower half portion
17b, the compression floor along the circumferential direction extend on semicircle 17a respectively in other words.It thus ensures and presses in the assembled condition
Tight floor 17a, 17b are extend into insulation crust 15 respectively in whole circumference.However the diameter of the longitudinal axis transverse to cable
It to direction, compresses floor 17a, 17b and is only permeated in a part of the wall thickness of insulation crust 15, to prevent its infiltration from reaching
Internally positioned conducting wire 16.
Cable is fixed on cable fixing part 7 by compressing floor 17a, 17b.Since 7 shape of cable fixing part cooperates
Bearing cap 3 is connect in other words with motor shell 2 on ground, and the pulling force being applied on cable is transmitted to motor shell by cable fixing part
In other words in bearing cap.Meanwhile it being ensured by cable fixing part 7 and not having foul and moisture infiltration to the inside of motor.
Claims (18)
1. motor has the bearing cap (3) that can be placed on motor shell (2) on end side, wherein from the motor shell
The cable (5) for powering for the motor is guided out between body (2) and the bearing cap (3), which is characterized in that for accommodating
The cable fixing part (7) of the cable (5) is arranged between the motor shell (2) and the bearing cap (3), wherein the electricity
Cable fixing piece (7) clamps the insulation crust (15) of the cable (5) and makes the insulation crust of the cable vertical about cable
It is fixed to direction, wherein the cable fixing part (7) is configured to top half (7a) and lower half portion (7b) this two parts,
In, the cable (5) is contained between the top half (7a) and lower half portion (7b), wherein the top half (7a)
It is connected with each other with the lower half portion (7b) by formfitting element (11a, 11b), wherein at least one and the lower half
The pin (13) for dividing (7b) integrally to construct extend into the groove in the motor shell (2) transverse to the cable longitudinal direction
(14) in, wherein the top half (7a) is shape-ordinatedly contained in the bearing cap (3) about the cable longitudinal direction
In, and the lower half portion (7b) is shape-ordinatedly contained in the motor shell (2) about the cable longitudinal direction.
2. motor described in accordance with the claim 1, which is characterized in that the cable fixing part (7) carrys out each cable (5)
Saying, there is at least one to compress floor (17a, 17b), the insulation crust (15) for compressing floor and clamping the cable (5).
3. motor according to claim 2, which is characterized in that the compression floor (17a, 17b) is embedded into the cable
(5) in insulation crust (15).
4. according to motor described in any one of claims 1 to 3, which is characterized in that three cables (5) in one plane
It is contained between the top half (7a) and lower half portion (7b).
5. motor described in accordance with the claim 1, which is characterized in that the holding floor extended transverse to the cable longitudinal direction
(12) it is contained in the bearing cap (3) in corresponding slot, the holding floor is integrally constructed with the top half (7a).
6. motor described in accordance with the claim 1, which is characterized in that the pin (13) is centering pin (13).
7. motor according to claim 2, which is characterized in that the top half (7a) in the bearing cap (3)
It is respectively provided with semicircular cable passage (10a, 10b) with the lower half portion (7b), the cable passage is around each one
Cable (5).
8. motor described in accordance with the claim 1, which is characterized in that the formfitting element (11a, 11b) is clamping lock connection
Portion or the portion that is clamped and connected.
9. motor described in accordance with the claim 1, which is characterized in that on the outer wall of the motor drive shaft (4) radial to the motor
The groove (14) for accommodating the cable fixing part (7) is packed into the bearing cap (3).
10. motor described in accordance with the claim 1, which is characterized in that the motor shell (2) has flat flange face, institute
The motor drive shaft (4) that flange face is stated transverse to the motor orients, and the lower half portion (7b) is existed using flat downside
It is pressed against when assembling the bearing cap on the flange face.
11. motor described in accordance with the claim 1, which is characterized in that the motor is motor (1).
12. motor described in accordance with the claim 1, which is characterized in that the cable fixing part (7) is for each cable (5)
For there is two compressions floors (17a, 17b) being sequentially arranged along cable longitudinal direction, the compression floor clamping electricity
The insulation crust (15) of cable (5).
13. motor described in accordance with the claim 1, which is characterized in that the cable (5) is pressed on top half (7a) and lower half
Partially between (7b).
14. motor according to claim 5, which is characterized in that the holding floor (12) is at the top half (7a)
Upper circumference on extend around.
15. motor according to claim 7 semicirclely, which is characterized in that the compression floor (17a, 17b) is molded over
In the cable passage (10a, 10b).
16. for manufacturing the method according to motor described in any one of claims 1 to 15, which is characterized in that first will be electric
Cable (5) is placed between top half (7a) and lower half portion (7b), and clamps institute by formfitting element (11a, 11b)
Cable is stated, and the cable fixing part (7) is inserted into the flat of the motor shell (2) followed by the pin (13)
In groove (14) in smooth flange face, and hereafter the bearing cap (3) is fixed on the flange face.
17. according to the method for claim 16, which is characterized in that the bearing cap (3) is tightened on the flange face.
18. according to the method for claim 16, which is characterized in that provide the strain relief for cable and dust seal.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE201310212041 DE102013212041A1 (en) | 2013-06-25 | 2013-06-25 | Electric machine, in particular electric motor |
| DE102013212041.9 | 2013-06-25 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104253503A CN104253503A (en) | 2014-12-31 |
| CN104253503B true CN104253503B (en) | 2019-01-15 |
Family
ID=52106145
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410284473.9A Active CN104253503B (en) | 2013-06-25 | 2014-06-24 | Motor, especially motor |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN104253503B (en) |
| DE (1) | DE102013212041A1 (en) |
| IN (1) | IN2014DE01465A (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6354726B2 (en) | 2015-10-07 | 2018-07-11 | トヨタ自動車株式会社 | Fixing assembly for fixing power line to base member and fixing method |
| CN107579621B (en) * | 2016-07-04 | 2020-10-23 | 台达电子工业股份有限公司 | Motor assembling structure |
| DE102018215787A1 (en) * | 2018-09-18 | 2020-03-19 | Robert Bosch Gmbh | Stator for an electrical machine, an electrical machine and method for producing an electrical machine |
| JP2020051323A (en) * | 2018-09-26 | 2020-04-02 | アイチエレック株式会社 | Compressor |
| JP2020051324A (en) * | 2018-09-26 | 2020-04-02 | アイチエレック株式会社 | Compressor |
| WO2024133807A1 (en) * | 2022-12-23 | 2024-06-27 | Valeo Equipements Electriques Moteur | A support element to secure a cable in a rotary electrical machine |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0675585A1 (en) * | 1994-04-01 | 1995-10-04 | F.I.M.E. - FABBRICA ITALIANA MOTORI ELETTRICI - S.r.l. | Cap fitted with external terminal board for electric motors |
| CN2874903Y (en) * | 2006-01-05 | 2007-02-28 | 碧茂科技股份有限公司 | Conductor terminal structure of motor |
| CN102834977A (en) * | 2010-05-04 | 2012-12-19 | 博泽沃尔兹堡汽车零部件有限公司 | Electrical assembly connection of a motor vehicle |
| CN102918721A (en) * | 2010-06-11 | 2013-02-06 | 罗伯特·博世有限公司 | Fluid-sealing electric motor connector and motor |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19517667A1 (en) * | 1995-05-13 | 1996-11-14 | Vdo Schindling | DC machine e.g. for motor vehicle water pump motor |
| CN2498778Y (en) * | 2001-07-19 | 2002-07-03 | 陈瑞珍 | Cable terminal sealor of underwater motor |
| CN2531570Y (en) * | 2002-03-15 | 2003-01-15 | 广东省东莞电机有限公司 | Connection structure of three-phase asynchronous motor |
| JP2004120911A (en) * | 2002-09-26 | 2004-04-15 | Mitsubishi Motors Corp | Seal construction of in-wheel motor |
| DE102007015782A1 (en) * | 2007-03-30 | 2008-10-02 | Robert Bosch Gmbh | DC machine |
-
2013
- 2013-06-25 DE DE201310212041 patent/DE102013212041A1/en active Pending
-
2014
- 2014-06-02 IN IN1465DE2014 patent/IN2014DE01465A/en unknown
- 2014-06-24 CN CN201410284473.9A patent/CN104253503B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0675585A1 (en) * | 1994-04-01 | 1995-10-04 | F.I.M.E. - FABBRICA ITALIANA MOTORI ELETTRICI - S.r.l. | Cap fitted with external terminal board for electric motors |
| CN2874903Y (en) * | 2006-01-05 | 2007-02-28 | 碧茂科技股份有限公司 | Conductor terminal structure of motor |
| CN102834977A (en) * | 2010-05-04 | 2012-12-19 | 博泽沃尔兹堡汽车零部件有限公司 | Electrical assembly connection of a motor vehicle |
| CN102918721A (en) * | 2010-06-11 | 2013-02-06 | 罗伯特·博世有限公司 | Fluid-sealing electric motor connector and motor |
Also Published As
| Publication number | Publication date |
|---|---|
| IN2014DE01465A (en) | 2015-06-19 |
| DE102013212041A1 (en) | 2015-01-08 |
| CN104253503A (en) | 2014-12-31 |
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