CN111181284A - Disc type hub driving motor - Google Patents
Disc type hub driving motor Download PDFInfo
- Publication number
- CN111181284A CN111181284A CN202010029474.4A CN202010029474A CN111181284A CN 111181284 A CN111181284 A CN 111181284A CN 202010029474 A CN202010029474 A CN 202010029474A CN 111181284 A CN111181284 A CN 111181284A
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- water
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- water tank
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
- H02K3/24—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors with channels or ducts for cooling medium between the conductors
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
- H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
- H02K21/24—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets axially facing the armatures, e.g. hub-type cycle dynamos
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/19—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
- H02K9/197—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil in which the rotor or stator space is fluid-tight, e.g. to provide for different cooling media for rotor and stator
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Motor Or Generator Cooling System (AREA)
Abstract
The invention relates to a disc type hub driving motor. Comprises a stator component and a rotor component; the stator component comprises an annular stator fixing frame, a plurality of stator units, a fixing shaft and a shaft-shaped flange, and the rotor component comprises a front flange, a magnet yoke, a permanent magnet and the like; the improvement lies in that: the stator fixing frame comprises an annular outer fixing frame and an annular inner water jacket, and the outer fixing frame is sleeved on the outer circumference of the inner water jacket; the outer fixing frame comprises a fixing ring and a plurality of fins which are radially and uniformly distributed on the outer circumference of the fixing ring; each fin is internally provided with a U-shaped water channel; the plurality of stator units are respectively and fixedly arranged between two adjacent fins correspondingly. When the cooling device works, the cooling liquid in the U-shaped water channel in each fin circularly flows to take away heat generated on the stator unit. The cooling water path of the motor is directly contacted with the winding of the motor, so that the heat dissipation area of the winding of the motor is effectively increased, the heat conduction resistance of the heat path of the motor is reduced, the heat dissipation power of the motor is effectively improved, and the power density is more than 6 kW/kg.
Description
Technical Field
The invention belongs to the technical field of motors, and particularly relates to a hub driving motor for a new energy automobile.
Background
The axial flux block iron core magnet-free yoke motor belongs to one kind of disc type motor, and has the advantages of high power density, high efficiency and the like due to the unique topological structure, so that the axial flux block iron core magnet-free yoke motor is very suitable for the application occasions with strict requirements on the volume and the weight of the motor, such as hub driving. But it is difficult to integrate the cooling system since the motor does not have a yoke. At present, heat dissipation is performed by integrating copper pipes at the back of the concentrated winding unit, as shown in fig. 12. However, the contact area between the copper pipe and the winding is small, the heat dissipation efficiency is low, and the output power of the motor is severely limited. According to literature reports, the power density of the axial flux segmented iron core no-yoke motor adopting the cooling mode is generally less than 4 kW/kg.
Disclosure of Invention
In order to effectively increase the heat dissipation area of a motor winding, reduce thermal resistance of a heat path and effectively improve the heat dissipation power of the motor, the invention provides a disk type hub driving motor through structural improvement.
The invention arranges a fin structure in the middle of a motor winding unit, the winding is attached to the fin structure, and a water channel is arranged in the fin; the cooling liquid in the water channel can effectively take away the heat generated on the winding.
A disc type hub driving motor comprises a stator assembly 1 and a rotor assembly 2; the stator assembly 1 comprises an annular stator fixing frame, a plurality of stator units, a fixing shaft 17 and a shaft-shaped flange 16, wherein each stator unit comprises a stator core, a stator coil winding and a fixing clip; the rotor assembly 2 comprises a front flange, a magnetic yoke, a permanent magnet, a shell and a rear flange; when in use, the stator assembly 1 is fixedly arranged on a chassis of a vehicle body; rotor subassembly 2 fixed mounting is on wheel hub, and rotor subassembly 2 drives wheel together rotatory when rotatory for stator module 1, improves and lies in:
the stator fixing frame comprises an annular outer fixing frame 19 and an annular inner water jacket 18, and the outer fixing frame 19 is sleeved on the outer circumference of the inner water jacket 18;
the external fixing frame 19 comprises a fixing ring and a plurality of fins 191, and the plurality of fins 191 are uniformly distributed on the outer circumference of the fixing ring and are radial; a U-shaped water channel 192 is formed in each fin 191, and two ports of each U-shaped water channel 192 penetrate through the inner circumference of the fixing ring; the plurality of stator units are respectively and correspondingly fixed between two adjacent fins 191;
a first annular water tank 181 and a second annular water tank 186 which are coaxial and are arranged on the outer circumference of the inner water jacket 18 in the radial direction respectively; the notch of the first water tank 181 and the notch of the second water tank 186 are both positioned on the outer circumference of the inner water jacket 18; a water inlet 184 is arranged at the lower part of the first water tank 181, and a notch of the first water tank 181 is correspondingly communicated with one port of the U-shaped water channel 192; a water outlet 185 is formed in the lower part of the second water tank 186; the notch of the second water tank 186 is correspondingly communicated with the other port of the U-shaped water channel 192;
the axial direction of the shaft-shaped flange 16 is provided with a water inlet pipe 15 and a water outlet pipe 151 which are communicated with the axial direction, and the other end of the water inlet 184 is communicated with the water inlet pipe 15 of the shaft-shaped flange 16; the other end of the water outlet 185 is communicated with a water outlet pipe 151 of the shaft-shaped flange 16;
in operation, the coolant in the U-shaped channels 192 in each fin 191 circulates to remove heat generated at the stator unit.
The technical scheme for further limiting is as follows:
eighteen fins 191 are uniformly distributed on the fixing ring of the external fixing frame 19, the U-shaped water channels 192 in the eighteen fins 191 are divided into three groups, and six U-shaped water channels 192 form one group; three water chambers with the same volume are respectively divided by three partition plates 183 in the first water tank 181 and the second water tank 186, the water chambers are fan-shaped, and the three water chambers in the first water tank 181 and the three water chambers in the second water tank 186 are staggered by 120 degrees; a group of U-shaped water channels corresponds to one water chamber. A water chamber in the first water tank 181 is divided into a water inlet chamber and a water outlet chamber by a partition plate; the lower part of the water inlet chamber is communicated with one end of the water inlet pipe 184, the notch of the water inlet chamber is correspondingly communicated with one port of the three U-shaped water channels 192, and the other port of the three U-shaped water channels 192 is communicated with a corresponding water chamber in the second water tank 186; the lower part of the water outlet chamber is communicated with one end of a water outlet pipe 185, the notch of the water outlet chamber is correspondingly communicated with one port of the other three U-shaped water channels 192, and the other port of the other three U-shaped water channels 192 is communicated with the corresponding water chamber in the second water tank 186; the notch of the second water chamber in the first water tank 181 is correspondingly communicated with one port of the second group of six U-shaped water channels 192, and the other port of the second group of six U-shaped water channels 192 is communicated with the corresponding water chamber in the second water tank 186; the notch of the third water chamber in the first water tank 181 is correspondingly communicated with one port of the third group of six U-shaped water channels 192), and the other port of the third group of six U-shaped water channels 192 is communicated with the corresponding water chamber in the second water tank 186; and a three-way parallel water cooling structure is realized.
The beneficial technical effects of the invention are embodied in the following aspects:
1. the cooling water path of the motor is directly contacted with the winding of the motor, so that the heat dissipation area of the winding of the motor can be effectively increased, the heat conduction resistance of the heat path of the motor is reduced, the heat dissipation power of the motor is effectively improved, and the power density is more than 6 kW/kg.
2. The stator structure is reasonable in design, and the radiating fins can play a role in fixing the stator core and the winding and can also radiate the motor winding.
3. Compared with the traditional liquid cooling motor, the motor does not need to conduct heat generated on the winding to the stator core firstly and then conduct the heat to the liquid cooling shell through the stator core, but conducts the heat to the liquid cooling shell directly. The motor can effectively reduce the thermal resistance between the stator winding and the liquid cooling pipeline, and improve the heat dissipation efficiency of the motor, thereby improving the output power.
4. The output power of the traditional hub motor is 65kw, the torque is 700Nm, and the weight of the whole motor is 37kg, but the weight of the whole motor is only 22.5kg and the effective weight of the motor is only 9.5kg by adopting the motor provided by the invention on the premise that the output power and the torque are kept the same, so that the power density of the motor can be effectively improved by adopting the motor provided by the invention.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is an assembly view of the stator assembly;
FIG. 3 is a right side view of FIG. 2;
FIG. 4 is an assembly view of the rotor assembly;
FIG. 5 is a schematic view of an external fixing frame;
FIG. 6 is a schematic view of the structure of the inner water jacket;
FIG. 7 is a radial cross-sectional view of FIG. 6;
FIG. 8 is a corresponding radial cross-sectional view of the first water tank of the outer mount and the inner water jacket;
FIG. 9 is a corresponding radial cross-sectional view of the second water tank of the outer mount and the inner water jacket;
FIG. 10 is an expanded view of the coolant flow path between the inner water jacket and the outer mount;
FIG. 11 is a radial cross-sectional view of the external mount;
fig. 12 is a structural schematic diagram of a disc type hub motor in the prior art.
Sequence numbers in the upper figure: the stator assembly 1, the rotor assembly 2, the front bearing 3, the rear bearing 4, the angle sensor 5, the stator core 11, the stator coil winding 12, the fixing clip 13, the carbon fiber fixing plate 14, the water inlet pipe 15, the water outlet pipe 151, the shaft-shaped flange 16, the fixing shaft 17, the inner water jacket 18, the outer water jacket 19, the front flange 21, the magnet yoke 22, the permanent magnet 23, the housing 24, the rear flange 25, the first water tank 181, the interlayer partition plate 182, the interlayer partition plate 183, the water inlet pipe 184, the water outlet pipe 185, the second water tank 186, the fins 191 and the water inlet and outlet passage 192.
Detailed Description
The invention will now be further described by way of example with reference to the accompanying drawings.
Example 1
In a traditional disc type hub motor, the weight of the motor is 26kg, the peak power is 55kW, the external dimension phi is 240mm multiplied by 140mm, the peak torque is 120Nm, and the power density of the motor is 2.12 kW/kg.
The disc type hub motor of the embodiment has the advantages that other structures are consistent with those of the existing disc type hub motor, only the cooling system is improved, the weight of the motor is 22kg, the peak power is 135kW, the peak torque is 300Nm, and the power density of the motor is 6.1 kW/kg.
Referring to fig. 1, a disc hub driving motor includes a stator assembly 1 and a rotor assembly 2; the stator assembly 1 comprises an annular stator fixing frame, a plurality of stator units, a fixing shaft 17 and a shaft-shaped flange 16; referring to fig. 3, each stator unit includes a stator core 11, a stator coil winding 12, and a fixing clip 13. Referring to fig. 4, the rotor assembly 2 includes a front flange 21, a yoke 22, a permanent magnet 23, a housing 24, and a rear flange 25. When in use, the stator assembly 1 is fixedly arranged on a chassis of a vehicle body; the rotor assembly 2 is fixedly arranged on the hub, and the rotor assembly 2 drives wheels to rotate together when rotating relative to the stator assembly 1; the improvement lies in that:
referring to fig. 2, the stator fixing frame includes an annular outer fixing frame 19 and an annular inner water jacket 18, and the outer fixing frame 19 is fitted over an outer circumference of the inner water jacket 18.
Referring to fig. 5, the external fixing frame 19 includes a fixing ring and eighteen fins 191, and the eighteen fins 191 are uniformly distributed and mounted on the outer circumference of the fixing ring in a radial shape; each fin 191 is internally provided with a U-shaped water channel 192, and two ports of the U-shaped water channel 192 penetrate through the inner circumference of the fixing ring, as shown in fig. 11. The plurality of stator units are respectively and correspondingly fixedly arranged between two adjacent fins 191, as shown in fig. 3.
Referring to fig. 6, a first annular water tank 181 and a second annular water tank 186, which are coaxial, are respectively opened in the radial direction of the outer circumference of the inner water jacket 18. The notch of the first water tank 181 and the notch of the second water tank 186 are both located on the outer circumference of the inner water jacket 18. The lower part of the first water tank 181 is communicated with one end of the water inlet 184, and the notch of the first water tank 181 is correspondingly communicated with one port of the U-shaped water channel 192; the lower part of the second water tank 186 is communicated with one end of the water outlet 185; the notch of the second water channel 186 is correspondingly communicated with the other port of the U-shaped water channel 192.
Three water chambers with the same volume are respectively divided by three inner clapboards 183 in the first water tank 181 and the second water tank 186, and the water chambers are fan-shaped; the three water chambers in the first water tank 181 and the three water chambers in the second water tank 186 are staggered at an angle of 120 degrees. The U-shaped water channels 192 in the eighteen fins 191 are divided into three groups, six U-shaped water channels 192 form one group, and one group of U-shaped water channels corresponds to one water chamber. Referring to fig. 7, a water chamber in the first water tank 181 is further divided into an inlet chamber and an outlet chamber by an inner partition 183. Referring to fig. 8 and 9, the lower portion of the inlet chamber communicates with one end of the inlet 184, the notches of the inlet chamber correspondingly communicate with one port of the three U-shaped water channels 192, and the other port of the three U-shaped water channels 192 communicates with the corresponding water chamber in the second water tank 186. The lower part of the water outlet chamber is communicated with one end of the water outlet 185, the notch of the water outlet chamber is correspondingly communicated with one port of the other three U-shaped water channels 192, and the other port of the other three U-shaped water channels 192 is communicated with the corresponding water chamber in the second water tank 186. The notches of the other two water chambers in the first water tank 181 are respectively and correspondingly communicated with one port of the six U-shaped water channels 192, and the other port of the six U-shaped water channels 192 is communicated with the corresponding water chamber in the second water tank 186; and a three-way parallel water cooling structure is realized.
Referring to fig. 2, the outer side of the shaft-shaped flange 16 is respectively provided with a water inlet pipe 15 and a water outlet pipe 151 which are axially penetrated, and the other end of the water inlet 184 is communicated with the water inlet pipe 15 of the shaft-shaped flange 16; the other end of the water outlet 185 is communicated with the water outlet pipe 151 of the shaft-shaped flange 16.
When the motor works, the water inlet pipe 15 and the water outlet pipe 151 of the shaft-shaped flange 16 are connected in series in a cooling water path of the motor. Referring to fig. 10, the coolant flows in from the side of the water inlet pipe 15 and first enters the inner water jacket 18, and due to the action of the inner partition 183 and the interlayer partition 182, the coolant passes through the U-shaped water channels 192 on the fins of the outer fixing frame 19 and then alternately flows in the two layers of water tanks of the inner water jacket 18, namely the first water tank 181 and the second water tank 186, and finally flows out from the side of the water outlet pipe 151. The dotted line in fig. 1 is a route of the flow of the cooling liquid.
The above description is only an embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can understand that the modifications or substitutions within the technical scope of the present invention are included in the scope of the present invention.
Example 2:
the disc type hub motor of the embodiment has the advantages that other structures are consistent with those of the traditional disc type hub motor, only a cooling system is improved, the structure is the same as that of the embodiment 1, and the size is different; the weight is 15kg, the peak power is 92kW, and the power density of the motor is 6.1 kW/kg.
The traditional disc type hub motor without the improved structure and with the same structure of other parts has the motor weight of 17kg, the peak power of 48kW and the motor power density of 2.8 kW/kg.
Claims (2)
1. A disc type hub driving motor comprises a stator assembly (1) and a rotor assembly (2); the stator assembly (1) comprises an annular stator fixing frame, a plurality of stator units, a fixing shaft (17) and a shaft-shaped flange (16), wherein each stator unit comprises a stator core, a stator coil and a fixing clip; the rotor assembly (2) comprises a front flange, a magnetic yoke, a permanent magnet, a shell and a rear flange; when in use, the stator assembly (1) is fixedly arranged on a chassis of a vehicle body; rotor subassembly (2) fixed mounting is on wheel hub, and rotor subassembly (2) drive the motor wheel together rotatory when rotatory for stator module (1), its characterized in that:
the stator fixing frame comprises an annular outer fixing frame (19) and an annular inner water jacket (18), and the outer fixing frame (19) is sleeved on the outer circumference of the inner water jacket (18);
the external fixing frame (19) comprises a fixing ring and a plurality of fins (191), and the fins (191) are uniformly distributed on the outer circumference of the fixing ring and are radial; a U-shaped water channel (192) is arranged in each fin (191), and two ports of the U-shaped water channel (192) penetrate through the inner circumference of the fixing ring; the plurality of stator units are respectively and correspondingly and fixedly arranged between two adjacent fins (191);
the outer circumference of the inner water jacket (18) is radially provided with a first annular water tank (181) and a second annular water tank (186) which are coaxial; the notch of the first water tank (181) and the notch of the second water tank (186) are both positioned on the outer circumference of the inner water jacket (18); the lower part of the first water tank (181) is communicated with one end of the water inlet (184), and the notch of the first water tank (181) is correspondingly communicated with one port of the U-shaped water channel (192); the lower part of the second water tank (186) is communicated with one end of the water outlet (185); the notch of the second water tank (186) is correspondingly communicated with the other port of the U-shaped water channel (192);
the axial direction of the axial flange (16) is provided with a water inlet and outlet pipe (15) and a water outlet pipe (151) which are communicated with the axial direction, and the other end of the water inlet (184) is communicated with the water inlet pipe (15) of the axial flange (16); the other end of the water outlet (185) is communicated with a water outlet pipe (151) of the shaft-shaped flange (16);
when the cooling device works, the water inlet pipe (15) and the water outlet pipe (151) of the shaft-shaped flange (16) are connected in series with a cooling water channel of the motor, and cooling liquid in the U-shaped water channel (192) in each fin (191) circularly flows to take away heat generated on the stator unit.
2. A disc hub drive motor according to claim 1, wherein: eighteen fins (191) are uniformly distributed on a fixing ring of the external fixing frame (19), U-shaped water channels (192) in the eighteen fins (191) are divided into three groups, and six U-shaped water channels (192) form one group; three water chambers with the same volume are respectively divided by three clapboards (183) in the first water tank (181) and the second water tank (186), the water chambers are fan-shaped, and the three water chambers in the first water tank (181) and the three water chambers in the second water tank (186) are staggered by an angle of 120 degrees; the group of U-shaped water channels corresponds to one water chamber; a water chamber in the first water tank (181) is divided into a water inlet chamber and a water outlet chamber by a partition plate; the lower part of the water inlet chamber is communicated with one end of a water inlet pipe (184), the notch of the water inlet chamber is correspondingly communicated with one port of three U-shaped water channels (192), and the other port of the three U-shaped water channels (192) is communicated with a corresponding water chamber in a second water tank (186); the lower part of the water outlet chamber is communicated with one end of a water outlet pipe (185), the notch of the water outlet chamber is correspondingly communicated with one port of the other three U-shaped water channels (192), and the other port of the other three U-shaped water channels (192) is communicated with a corresponding water chamber in the second water tank (186); the notch of the second water chamber in the first water tank (181) is correspondingly communicated with one port of the second group of six U-shaped water channels (192), and the other port of the second group of six U-shaped water channels (192) is communicated with the corresponding water chamber in the second water tank (186); the notch of the third water chamber in the first water tank (181) is correspondingly communicated with one port of the third group of six U-shaped water channels (192), and the other port of the third group of six U-shaped water channels (192) is communicated with the corresponding water chamber in the second water tank (186); and a three-way parallel water cooling structure is realized.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010029474.4A CN111181284B (en) | 2020-01-13 | 2020-01-13 | Disc type hub driving motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010029474.4A CN111181284B (en) | 2020-01-13 | 2020-01-13 | Disc type hub driving motor |
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| Publication Number | Publication Date |
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| CN111181284A true CN111181284A (en) | 2020-05-19 |
| CN111181284B CN111181284B (en) | 2022-03-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010029474.4A Active CN111181284B (en) | 2020-01-13 | 2020-01-13 | Disc type hub driving motor |
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| Country | Link |
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| CN (1) | CN111181284B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112208558A (en) * | 2020-08-31 | 2021-01-12 | 上海安沛动力科技有限公司 | Wheel hub motor of rail chassis |
| CN113162266A (en) * | 2021-03-10 | 2021-07-23 | 安徽机电职业技术学院 | Cooling device for automobile hub motor |
| WO2022142498A1 (en) * | 2020-12-30 | 2022-07-07 | 浙江盘毂动力科技有限公司 | Disc motor |
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| JP2017184517A (en) * | 2016-03-31 | 2017-10-05 | 株式会社デンソー | Rotary electric machine |
| CN107612194A (en) * | 2017-09-11 | 2018-01-19 | 天津大学 | A kind of squirrel cage induction motor with inner circulating air cooling duct |
| CN207117329U (en) * | 2017-05-17 | 2018-03-16 | 刘霄 | A kind of overall formula motor water cooling stator in triple-spool axial direction |
| CN110429727A (en) * | 2019-07-31 | 2019-11-08 | 江苏大学 | A kind of hub motor for electric automobile stator water-cooling structure |
| CN110504790A (en) * | 2019-08-26 | 2019-11-26 | 合肥骐骥电驱动技术有限公司 | A kind of high power density axial magnetic flux hub motor of short axial structure |
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2020
- 2020-01-13 CN CN202010029474.4A patent/CN111181284B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2003527050A (en) * | 2000-02-25 | 2003-09-09 | フォイト・ジーメンズ・ヒドロ・パワー・ジェネレーション・ゲーエムベーハー・ウント・コ・カーゲー | Rotating electric machine |
| CN1514128A (en) * | 2002-08-24 | 2004-07-21 | 杨树军 | Water floating power machine |
| JP2017184517A (en) * | 2016-03-31 | 2017-10-05 | 株式会社デンソー | Rotary electric machine |
| CN207117329U (en) * | 2017-05-17 | 2018-03-16 | 刘霄 | A kind of overall formula motor water cooling stator in triple-spool axial direction |
| CN107612194A (en) * | 2017-09-11 | 2018-01-19 | 天津大学 | A kind of squirrel cage induction motor with inner circulating air cooling duct |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112208558A (en) * | 2020-08-31 | 2021-01-12 | 上海安沛动力科技有限公司 | Wheel hub motor of rail chassis |
| WO2022142498A1 (en) * | 2020-12-30 | 2022-07-07 | 浙江盘毂动力科技有限公司 | Disc motor |
| CN113162266A (en) * | 2021-03-10 | 2021-07-23 | 安徽机电职业技术学院 | Cooling device for automobile hub motor |
| CN113162266B (en) * | 2021-03-10 | 2023-07-25 | 安徽机电职业技术学院 | Cooling device for automobile hub motor |
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| Publication number | Publication date |
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| CN111181284B (en) | 2022-03-29 |
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