CN108712000A - A kind of high efficiency motor convenient for heat dissipation - Google Patents
A kind of high efficiency motor convenient for heat dissipation Download PDFInfo
- Publication number
- CN108712000A CN108712000A CN201810589539.3A CN201810589539A CN108712000A CN 108712000 A CN108712000 A CN 108712000A CN 201810589539 A CN201810589539 A CN 201810589539A CN 108712000 A CN108712000 A CN 108712000A
- Authority
- CN
- China
- Prior art keywords
- engine base
- heat
- high efficiency
- motor
- heat dissipation
- 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.)
- Granted
Links
Classifications
-
- 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
- H02K5/20—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/20—Stationary parts of the magnetic circuit with channels or ducts for flow of cooling medium
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/02—Arrangements for cooling or ventilating by ambient air flowing through the machine
- H02K9/04—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium
- H02K9/06—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium with fans or impellers driven by the machine shaft
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/22—Arrangements for cooling or ventilating by solid heat conducting material embedded in, or arranged in contact with, the stator or rotor, e.g. heat bridges
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
- Motor Or Generator Cooling System (AREA)
Abstract
The invention discloses a kind of high efficiency motors convenient for heat dissipation, including engine base, stator in the engine base, with the matched rotor of the stator, bearing cap at the top of the engine base and the pedestal set on the engine base bottom, shell is equipped on the outside of the engine base, the bearing cap is detachably connected with the engine base, the pedestal is detachably connected with the engine base, the high efficiency motor convenient for heat dissipation further includes heat-transfer device, the heat-transfer device includes the heat conducting pipe being set between the shell and the engine base, thermal conductive cavity in the engine base, thermal trough on the stator and on the engine base and with the matched heat-conducting block of the thermal trough, the thermal conductive cavity is connected with the heat conducting pipe；The amount of heat that the present invention generates when motor can work distributes, and promotes the thermal diffusivity of motor, prevents motor over-heat inside from being impacted to motor.
Description
Technical field
The invention belongs to electrical engineering fields, more particularly, to a kind of high efficiency motor convenient for heat dissipation.
Background technology
Motor is indicated with letter M in circuit, its main function is to generate driving torque, as electrical appliance or various
The power source of machinery.Existing motor will produce a large amount of heat when working and running, and makes quickly heating inside motor, causes
Temperature in motor is excessively high to impact motor, reduces motor service life.
Invention content
The present invention for overcome the deficiencies in the prior art, provides a kind of height convenient for heat dissipation that can promote motor radiating effect
Imitate motor.
To achieve the goals above, the present invention uses following technical scheme：A kind of high efficiency motor convenient for heat dissipation, including machine
Seat, the stator in the engine base, with the matched rotor of the stator, the bearing cap at the top of the engine base and be set to
The pedestal of the engine base bottom, the engine base outside are equipped with shell, and the bearing cap is detachably connected with the engine base, the bottom
Seat is detachably connected with the engine base, and the high efficiency motor convenient for heat dissipation further includes heat-transfer device, and the heat-transfer device includes
Heat conducting pipe between the shell and the engine base, the thermal conductive cavity in the engine base, leading on the stator
Heat channel and on the engine base and with the matched heat-conducting block of the thermal trough, the thermal conductive cavity is connected with the heat conducting pipe
It is logical；When motor works heat production, stator generates a large amount of heat, the phase interworking that the heat on stator passes through thermal trough and heat-conducting block
It closes, the heat in the heat transfer to engine base in motor, being transmitted in engine base is subjected to heat conduction by thermal conductive cavity, in motor
Heat is once absorbed, and the heat in motor is made to distribute, and in the heat transfer to heat conducting pipe in thermal conductive cavity, passes through heat conduction
Pipe radiates to the heat in thermal conductive cavity, and the temperature in motor is made effectively to be declined；Pass through heat-conducting block and thermal trough
Cooperation increases the contact area of idea and engine base, so that the heat on stator is effectively transmitted on engine base, by engine base
The cooperation of thermal conductive cavity and heat conducting pipe reach motor rapid cooling purpose, avoid electric built-in temperature is excessively high from being impacted to motor；
Bearing cap is set as being detachably connected with pedestal and engine base, simplifies disassembling and assembling machine process, the assembly of motor is made to become more convenient.
Preferably, the rotor is equipped with driving wheel, the bearing cap is equipped with water pump, and the water pump top is equipped with defeated
Enter gear, the driving wheel coordinates with input gear transmission；When motor works, rotor starts to rotate, rotor rotation
Driving wheel is driven to rotate simultaneously, driving wheel drives input gear rotation, input gear rotation so that water pump is started to work, pass through rotor
The rotation of itself drives pump working, and the effect of motor is maximized, and rationally utilizes motor kinetic energy, simplifies device structure.
Preferably, the bearing cap is equipped with equipment cavity, the water pump and the driving wheel are set to the equipment cavity
It is interior；Water pump and driving wheel are set in equipment cavity, carry out the transmission of water pump in equipment cavity, protection water pump when receiving power more
Add steady, by ectocine when avoiding driving wheel water supply pump drive, influence the normal operation of water pump, water pump by input gear with
The gear of driving wheel engages, and so that the power of rotor is transmitted more stable, promotes water pump efficiency.
Preferably, being equipped with multiple heating columns on the outside of the heat conducting pipe, the shell is equipped with multiple strip gabs；Work as electricity
When in the heat transfer to heat conducting pipe in machine, the heat of heat conducting pipe is distributed by heating column, makes heat conducting pipe by heating column
Be quickly cooled down, heat conducting pipe and heating column be arranged in shell, shielded to heating column and heat conducting pipe, prevent heat conducting pipe and
Heating column is caused to damage by ectocine to heat conducting pipe and heating column, is arranged strip gab on shell, increase heating column with it is outer
The area of boundary's air contact, enables heating column preferably to radiate, promotes the heat dissipation effect of motor.
Preferably, the rotor is equipped with fan, spacing ring is equipped with below the fan；Spacing ring plays limit to fan
And fixed function, increase the fastness of fan, rotor drives fan to rotate together in rotation, and fan rotation push air is formed
Air-flow increases the speed air flow in motor, helps preferably to be radiated inside motor, promotes motor radiating effect.
Preferably, the engine base bottom is equipped with ventilation hole, the ventilation hole is arranged in the pedestal；Ventilation hole is set
So that motor interior air-flow is alternateed with motor external air flow, is conducive to the air-flow of fan blowout by the heat in motor from ventilation hole
Place takes out of, promotes the heat dissipation effect of motor, avoids the excessively high influence motor service life of motor internal temperature.
Preferably, being equipped with the limiting device for playing position-limiting action to rotor in the pedestal；Limiting device plays rotor solid
It is set for using, avoids rotor to be shaken in rotation process in one position rotor restriction, influence the stability of motor output.
Preferably, the bearing cap is equipped with the fixing device that can avoid rotor shake；When motor works, fixed dress
It sets and effect is fixed to rotor, the rotation for enabling rotor to stablize keeps the power that rotor of output shaft axle exports more stable, avoids
Rotor generates shake, improves motor use reliability.
The present invention has the following advantages：The amount of heat generated when motor can work distributes, and promotes motor
Thermal diffusivity prevents motor over-heat inside from being impacted to motor.
Description of the drawings
Fig. 1 is the structural diagram of the present invention.
Fig. 2 is the structural schematic diagram of rotor of the present invention.
Fig. 3 is enlarged drawing at Figure 1A.
Fig. 4 is heat-transfer device structural schematic diagram of the present invention.
Fig. 5 is rotor vertical view of the present invention.
Fig. 6 is rotor limited block vertical view of the present invention.
Fig. 7 is fan schematic diagram of the present invention.
Fig. 8 is the side view of inventive shell.
Fig. 9 is the vertical view in inventive shell.
Specific implementation mode
In order to make those skilled in the art be better understood from the present invention program, below in conjunction in the embodiment of the present invention
Attached drawing, technical solution in the embodiment of the present invention carry out clear, complete description, it is clear that described embodiment is only
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill people
The every other embodiment that member is obtained without making creative work should all belong to the model that the present invention protects
It encloses.
As shown in Figure 1, it is a kind of convenient for heat dissipation high efficiency motor, including engine base 1, the stator 4 in the engine base 1, with
4 matched rotor 5 of the stator, the pedestal 3 set on the bearing cap 2 at 1 top of the engine base and set on 1 bottom of the engine base,
The bearing cap 2 is detachably connected with the engine base 1, and the pedestal 3 is detachably connected with the engine base 1, described detachably to connect
It can be clamping to connect, and heat-transfer device is equipped in the engine base 1；The heat that motor generates at work is passed by heat-transfer device
It passs, most of heat is made to be conducted, avoid motor overheating from causing electric inboard installation impaired, influence the service life of motor；
The bearing cap 2, which is equipped with, can avoid the fixing device that rotor 5 is shaken, and fixing device is fixed effect to rotor 5, makes rotor
5 rotations that can stablize keep the power that 5 output shaft of rotor exports more stable, rotor 5 are avoided to generate shake, and improving motor makes
Use reliability.
The fixing device include the multiple grooves 11 being set on the bearing cap 2 and on the rotor 5 and with institute
State the matched multiple bearings of multiple grooves 11 51；Each bearing 51 is matched with corresponding groove 11, herein with bearing 51
It is for 4 with groove 11, since each bearing 51 is matched with corresponding groove 11, by multiple grooves 11 and more
Effect is fixed to rotor 5 in a bearing 51, when rotor 5 rotates, the hair in corresponding groove 11 of one of bearing 51
When raw displacement, other bearings 51 make rotor 5 by the movement of cooperation limitation wherein single bearing 51 and groove 11 with groove 11
Displacement can not be carried out while rotation, avoids rotor 5 from being shaken during rotation, influences motor output stability.
The heat-transfer device include be set to the engine base 1 in thermal conductive cavity 13, the thermal trough 41 on the stator 4 and
On the engine base 1 and with 41 matched heat-conducting block 14 of the thermal trough, coolant is equipped in the thermal conductive cavity 13, it is described
Thermal trough 41 is no less than one, and the coolant can be water, add multiple thermal troughs 41, make the contact area of stator 4 and engine base 3
It is significantly increased, makes stator 4 that heat are preferably conducted to engine base 3 in thermal conductive cavity 13 after fever and add coolant, to engine base 1
Cooling processing is carried out, 1 own temperature of engine base is not easy rapid increase, and stator 4 and the temperature difference of engine base 1 is made to become larger, and is conducive to stator 4 and transmits
Heat；When motor works heat production, generate a large amount of heat on stator 4, added on stator 4 thermal trough 13 increase stator 4 with
The contact area of engine base 1 is arrived most of heat transfer on stator 4 by the mutual cooperation of thermal trough 13 and heat-conducting block 14
On engine base 1, heat conduction, the heat for making to be transmitted on engine base 1 using the large area of engine base 1 are carried out by the thermal conductive cavity 13 on engine base 1
Quick diffusing avoids the worked heat affecting motor service life of motor.
The limiting device that position-limiting action is played to rotor 5 is equipped in the pedestal 3, the limiting device includes being set to the bottom
Cavity 31 in seat 3 and multiple raised lines 13 in the cavity 31,5 bottom of the rotor are equipped with limited block 54, the limit
Position block 54 is equipped with and 13 matched limiting slot 542 of the raised line and limited ring groove 541；Limited block 54 plays limit to rotor 5
Effect makes 5 bottom of rotor be formed with cavity 31 and coordinates, and limiting slot 542 is set in the middle part of 54 bottom surface of limited block, and limited ring groove 541 is set
In 54 edge of limited block, 542 shape of limiting slot is identical as 13 outer profile of raised line, and limited ring groove 541 can be rotated around raised line 13；
By the cooperation of limiting slot 541 and raised line 13, rotor 5 is limited in predeterminated position, makes rotor 5 that can not move left and right, led to
The cooperation for crossing limited ring groove 541 and raised line 13 makes rotor 5 that can only be rotated along predetermined trajectory, passes through 541 He of limited ring groove
The mutual cooperation of limiting slot 542 makes rotor 5 that can not move up and down, and keeps rotor 5 more steady in rotation, promotes motor
Export stablizing effect.
The rotor 5 is equipped with fan 52, and 52 lower section of the fan is equipped with spacing ring 53；The flabellum of fan 52 is odd number piece
Setting avoids fan from generating more resonance when running at high speed, and can not bear what resonance generated for a long time so as to cause blade
Finally there is situations such as leaf destruction in fatigue；Spacing ring 53 plays limit and fixed function to fan 52, increases the secured of fan 52
Property, rotor 5 rotation when drive fan 52 rotate together, fan 52 rotation push air formed air-flow, increase motor in sky
Flow of air speed helps preferably to be radiated inside motor, promotes motor radiating effect.
1 bottom of the engine base is equipped with ventilation hole 12, and the ventilation hole 12 is arranged in the pedestal 3；Ventilation hole 12 is set
So that motor interior air-flow is alternateed with motor external air flow, is conducive to the air-flow of the blowout of fan 52 by the heat in motor from ventilation
It is taken out of at hole, promotes the heat dissipation effect of motor, avoid the excessively high influence motor service life of motor internal temperature.
It is additionally provided with driving wheel 55 on the rotor 5, equipment cavity is equipped in the bearing cap 2, the equipment cavity is set to described
The top of groove 11, is equipped with water pump 21 in the equipment cavity, and 21 input shaft of water pump is equipped with input gear 211, input gear 211 with
Driving wheel 55 is intermeshed by gear, when rotor 5 rotates, is driven input gear 211 to rotate by driving wheel 55, is made water pump
21 start to work；1 outside of the engine base is equipped with shell 6, and 6 top of shell is fixedly connected on bearing cap 2, and lower part is fixedly connected on
On engine base 1, the heat-transfer device further includes heat conducting pipe 61, and cavity is equipped between shell 6 and engine base 1, and heat conducting pipe 61 is set to described
In cavity, the heat conducting pipe 61 is set around 1 outer surface of engine base in the shape of a spiral, and 21 efferent duct of water pump is connected with 61 beginning of heat conducting pipe,
21 input pipe of water pump is connected with 61 end of heat conducting pipe, and the input pipe and efferent duct of water pump 21 are soft tube, can be rubber control
At, be connected with heat conducting pipe 61 convenient for 21 input pipe of water pump and efferent duct, 21 input pipe of water pump and efferent duct and heat conducting pipe 61 it
Between to be detachably connected, the input pipe of water pump 21 and efferent duct can be disconnected with heat conducting pipe 61 when to disassembling and assembling machine.
Water pump 21 and driving wheel 55 are set in equipment cavity, the transmission of water pump 21 is carried out in equipment cavity, protects water pump 21
It is more steady when receiving power, by ectocine when 55 feed pump 21 of driving wheel being avoided to be driven, influence the normal fortune of water pump 21
Row, water pump 21 are engaged by input gear 211 with the gear of driving wheel 55, so that the power of rotor 5 is transmitted more stable, are promoted water
Pump 21 operational efficiency；Thermal conductive cavity 13 is connected with heat conducting pipe 61, and the coolant in thermal conductive cavity 13 can be entered in heat conducting pipe 61 and be carried out
Heat conduction cools down, and the temperature of coolant is made to lower, and better cooling effect is played to motor inside.
When motor works, rotor 5 drives driving wheel 55 to rotate, and driving wheel 55 drives input tooth by the engagement between gear
211 rotation of wheel, provides power for water pump 21, water pump 21 is made to start to work, by water pump 21 make coolant in heat conducting pipe 61 into
Row circulates, and helps the coolant in thermal conductive cavity 13 to be quickly cooled down, coolant is enable preferably to play cooling effect, is promoted
Motor radiating effect avoids motor internal temperature is excessively high from being damaged to motor.
61 outside of the heat conducting pipe is equipped with multiple heating columns 62, and the shell 1 is equipped with multiple strip gabs 15, works as motor
When in interior heat transfer to heat conducting pipe 61, the heat of heat conducting pipe 61 is distributed by heating column 62, is made by heating column 62
Heat conducting pipe 61 is quickly cooled down, and heat conducting pipe 61 and heating column 62 are arranged in shell 1, protection is played to heating column 62 and heat conducting pipe 61
Effect, prevents heat conducting pipe 61 and heating column 62 by ectocine, causes to damage to heat conducting pipe 61 and heating column 62, on shell 1
Strip gab 15 is set, increases the area of heating column 62 and contacting external air, heating column 62 is enable preferably to radiate,
Promote the heat dissipation effect of motor.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Any one skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (8)
1. a kind of high efficiency motor convenient for heat dissipation, including engine base（1）, be set to the engine base（1）Interior stator（4）, with it is described fixed
Son（4）Matched rotor（5）, be set to the engine base（1）The bearing cap at top（2）And it is set to the engine base（1）The bottom of bottom
Seat（3）, the engine base outside is equipped with shell, the bearing cap（2）With the engine base（1）It is detachably connected, the pedestal（3）With
The engine base（1）It is detachably connected, it is characterised in that：The high efficiency motor convenient for heat dissipation further includes heat-transfer device, described to lead
Thermal includes being set to the shell（6）With the engine base（1）Between heat conducting pipe（61）, be set to the engine base（1）Interior leads
Hot chamber（13）, be set to the stator（4）On thermal trough（41）And it is set to the engine base（1）It is upper and with the thermal trough（41）Phase
The heat-conducting block of cooperation（14）, the thermal conductive cavity（13）With the heat conducting pipe（61）It is connected.
2. a kind of high efficiency motor convenient for heat dissipation described in accordance with the claim 1, it is characterised in that：The rotor（5）It is equipped with
Driving wheel（55）, the bearing cap（2）It is equipped with water pump（21）, the water pump（21）Top is equipped with input gear（211）, described
Driving wheel（55）With the input gear（211）Transmission cooperation.
3. a kind of high efficiency motor convenient for heat dissipation according to claim 2, it is characterised in that：The bearing cap（2）On set
There are equipment cavity, the water pump（21）With the driving wheel（55）It is set in the equipment cavity.
4. a kind of high efficiency motor convenient for heat dissipation described in accordance with the claim 1, it is characterised in that：The heat conducting pipe（61）Outside
Equipped with multiple heating columns（62）, the shell（1）It is equipped with multiple strip gabs（15）.
5. a kind of high efficiency motor convenient for heat dissipation described in accordance with the claim 1, it is characterised in that：The rotor（5）It is equipped with
Fan（52）, the fan（52）Lower section is equipped with spacing ring（53）.
6. a kind of high efficiency motor convenient for heat dissipation according to claim 5, it is characterised in that：The engine base（1）Bottom is set
There is ventilation hole（12）, the ventilation hole（12）It is arranged in the pedestal（3）It is interior.
7. a kind of high efficiency motor convenient for heat dissipation according to claim 2, it is characterised in that：The pedestal（3）Inside it is equipped with
To rotor（5）Play the limiting device of position-limiting action.
8. a kind of high efficiency motor convenient for heat dissipation according to claim 2, it is characterised in that：The bearing cap（2）On set
There is avoidable rotor（5）The fixing device of shake.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810589539.3A CN108712000B (en) | 2018-06-08 | 2018-06-08 | A kind of high efficiency motor convenient for heat dissipation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810589539.3A CN108712000B (en) | 2018-06-08 | 2018-06-08 | A kind of high efficiency motor convenient for heat dissipation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108712000A true CN108712000A (en) | 2018-10-26 |
| CN108712000B CN108712000B (en) | 2019-06-18 |
Family
ID=63871463
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810589539.3A Active CN108712000B (en) | 2018-06-08 | 2018-06-08 | A kind of high efficiency motor convenient for heat dissipation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108712000B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112928864A (en) * | 2021-01-21 | 2021-06-08 | 刘俊国 | Environment-friendly bidirectional wind-driven automobile generator |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3501878B2 (en) * | 1995-07-28 | 2004-03-02 | 日機装株式会社 | High-speed motor with integrated cooling and lubrication system |
| CN201910691U (en) * | 2010-12-31 | 2011-07-27 | 上海东润换热设备制造有限公司 | Engine seat with novel cooling jacket |
| CN205992824U (en) * | 2016-08-29 | 2017-03-01 | 宿迁市天宁机电有限公司 | A kind of band is from the electric vehicle motor of cooling water pump |
| CN206517239U (en) * | 2017-02-22 | 2017-09-22 | 浙江永发机电有限公司 | A kind of servomotor |
-
2018
- 2018-06-08 CN CN201810589539.3A patent/CN108712000B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3501878B2 (en) * | 1995-07-28 | 2004-03-02 | 日機装株式会社 | High-speed motor with integrated cooling and lubrication system |
| CN201910691U (en) * | 2010-12-31 | 2011-07-27 | 上海东润换热设备制造有限公司 | Engine seat with novel cooling jacket |
| CN205992824U (en) * | 2016-08-29 | 2017-03-01 | 宿迁市天宁机电有限公司 | A kind of band is from the electric vehicle motor of cooling water pump |
| CN206517239U (en) * | 2017-02-22 | 2017-09-22 | 浙江永发机电有限公司 | A kind of servomotor |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112928864A (en) * | 2021-01-21 | 2021-06-08 | 刘俊国 | Environment-friendly bidirectional wind-driven automobile generator |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108712000B (en) | 2019-06-18 |
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| TA01 | Transfer of patent application right |
Effective date of registration: 20190521 Address after: 211500 No. 3 Dongwu Road, Shimiao Community, Hengliang Street, Liuhe District, Nanjing, Jiangsu Province Applicant after: Nanjing Youhe Environmental Protection Equipment Co., Ltd. Address before: 312353 Shangpu Town Industrial Zone, Shangyu District, Shaoxing City, Zhejiang Province Applicant before: Zhejiang Jiangyu Motor Co., Ltd. |
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