CN116526729B - A low-speed, high-torque permanent magnet direct-drive motor that is easy to fix - Google Patents
A low-speed, high-torque permanent magnet direct-drive motor that is easy to fix Download PDFInfo
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- CN116526729B CN116526729B CN202310508448.3A CN202310508448A CN116526729B CN 116526729 B CN116526729 B CN 116526729B CN 202310508448 A CN202310508448 A CN 202310508448A CN 116526729 B CN116526729 B CN 116526729B
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- 229910000831 Steel Inorganic materials 0.000 claims description 13
- 239000010959 steel Substances 0.000 claims description 13
- 238000000034 method Methods 0.000 description 11
- 238000010586 diagram Methods 0.000 description 4
- 239000003638 chemical reducing agent Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
- H02K7/116—Structural association with clutches, brakes, gears, pulleys or mechanical starters with gears
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/64—Electric machine technologies in electromobility
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
Abstract
本发明公开了一种便于固定的低速大扭矩永磁直驱电机，包括低速大扭矩电机本体，所述低速大扭矩电机本体上端活动连接有电机转轴，所述低速大扭矩电机本体外侧固定套接有连接环，所述连接环内开设有连接槽，所述连接槽内滑接有T型环，所述定位环活动套接于电机转轴外侧，所述T型环外侧内开设有若干组齿牙，所述T型环下侧设有螺母，所述螺母活动连接于连接环内，所述螺母外侧内开设有若干组连接齿牙；通过将卡接环卡接至电机安装孔内并将挂钩与钢丝绳连接在一起，通过低速大扭矩电机本体的转动可使T型环带动收线轮开始转动，待定位环移动至最低位置时，此时低速大扭矩电机本体与索道电机安装架被固定在一起，无需吊车即可对低速大扭矩电机本体进行安装，实现对低速大扭矩电机本体的快速固定。
The invention discloses a low-speed and high-torque permanent magnet direct-drive motor that is easy to fix, comprising a low-speed and high-torque motor body, wherein the upper end of the low-speed and high-torque motor body is movably connected with a motor shaft, a connecting ring is fixedly sleeved on the outer side of the low-speed and high-torque motor body, a connecting groove is provided in the connecting ring, a T-shaped ring is slidably connected in the connecting groove, the positioning ring is movably sleeved on the outer side of the motor shaft, a plurality of groups of teeth are provided in the outer side of the T-shaped ring, a nut is provided on the lower side of the T-shaped ring, the nut is movably connected in the connecting ring, and a plurality of groups of connecting teeth are provided in the outer side of the nut; by clamping the clamping ring into the motor mounting hole and connecting the hook with the wire rope, the T-shaped ring can drive the take-up wheel to start rotating through the rotation of the low-speed and high-torque motor body, and when the positioning ring moves to the lowest position, the low-speed and high-torque motor body and the cableway motor mounting frame are fixed together, the low-speed and high-torque motor body can be installed without a crane, and the low-speed and high-torque motor body can be quickly fixed.
Description
Technical Field
The invention relates to the technical field of motors, in particular to a low-speed high-torque permanent magnet direct-drive motor convenient to fix.
Background
In recent years, a direct drive system is adopted in international cableway company products, a cableway adopting a direct drive technology eliminates a heavy speed reducer, a low-speed high-torque direct drive motor is directly connected to a driving wheel, and compared with the traditional motor speed reducer, the direct drive omits a series of defects brought by the speed reducer, so that the direct drive cableway has a plurality of advantages, and is built and put into use in China.
The invention discloses a motor fixing structure, which comprises a frame, a buckle base and a buckle cover, wherein the buckle base and the buckle cover are arranged on one side of the frame, a through hole is formed in the middle area of the buckle base, a motor shaft hole is formed in the center of the buckle cover, at least one fixed tooth opening and at least one guide fixing groove are formed in the buckle base along the circumferential direction, at least one elastic tooth opening is formed in the buckle cover corresponding to the at least one fixed tooth opening, at least one guide spigot is formed in the buckle cover corresponding to the at least one guide fixing groove, the at least one elastic tooth opening is enabled to be correspondingly clamped with the at least one fixed tooth opening through rotation of the buckle cover, and the at least one guide spigot is enabled to correspondingly enter the at least one guide fixing groove.
The technical scheme is that the motor and the frame can be fixedly mounted together through the clockwise rotating snap-on cover in the above-mentioned patent, but in the mounting process of the cableway motor, because the permanent magnet direct-drive motor with low speed and high torque is adopted at present, the weight of the permanent magnet direct-drive motor with low speed and high torque which is commonly used is far larger than that of the conventional common direct-drive motor, so that installers need to lift the permanent magnet direct-drive motor with low speed and high torque to the mounting position of the cableway motor by means of a crane to mount, and because the cableway is mostly arranged in mountain forest, when trees in the mounting area are thick, the crane cannot lift the motor under the blocking of the trees, and then workers are required to lift the permanent magnet direct-drive motor with low speed and high torque by manpower to mount, which is time-consuming and labor-consuming and inconvenient to rapidly fix the permanent magnet direct-drive motor with low speed and high torque.
Disclosure of Invention
The invention aims to provide a low-speed high-torque permanent magnet direct-drive motor which is convenient to fix, so as to solve the problems in the background technology.
In order to achieve the above purpose, the present invention provides the following technical solutions:
the utility model provides a low-speed big moment of torsion permanent magnetism direct-drive motor convenient to it is fixed, includes low-speed big moment of torsion motor body, low-speed big moment of torsion motor body upper end swing joint has the motor pivot, the fixed go-between that has cup jointed in the low-speed big moment of torsion motor body outside, the spread groove has been seted up in the spread groove, the spread groove internal slip has T type ring, the T type ring upper end stretches out the spread ring to with holding ring fixed connection, the holding ring activity cup joints in the motor pivot outside, a plurality of groups tooth have been seted up in the T type ring outside, a plurality of groups slope tooth have been seted up at the T type ring outside middle part;
The T-shaped ring is characterized in that conical gears are arranged on the periphery of the outer side of the T-shaped ring, a plurality of groups of inclined teeth are meshed with the conical gears, the conical gears are movably connected in the T-shaped ring, the conical gears are far away from a wire take-up wheel fixedly connected with one side of the T-shaped ring, a steel wire rope is wound in the wire take-up wheel, the upper end of the steel wire rope stretches out of the connecting ring and is movably connected with the clamping ring, nuts are arranged on the lower side of the T-shaped ring and are movably connected in the connecting ring, and a plurality of groups of connecting teeth are arranged in the outer side of the nuts.
Preferably, one side of the positioning ring, which is close to the motor rotating shaft, is movably connected with four groups of limiting blocks, the limiting blocks are slidably connected in limiting grooves, and the limiting grooves are formed in the motor rotating shaft.
Preferably, the stopper is kept away from motor pivot one side and is provided with the storage tank, the storage tank is seted up in the holding ring, stopper is close to storage tank one side fixedly connected with adjusting screw, adjusting screw swing joint is in the holding ring.
Preferably, one side, far away from the bevel gear, of the take-up pulley is movably connected in the sliding block, the sliding block is slidably connected in the sliding groove, and the sliding groove is formed in the connecting groove.
Preferably, the upper end and the lower end of the nut are fixedly connected with guide rings, the guide rings are slidably connected in the guide grooves, the guide grooves are formed in the connecting rings, screw mounting holes are formed in the upper side and the lower side of the nut, and the screw mounting holes are formed in the connecting rings.
Preferably, the upper side of the screw mounting hole is provided with a T-shaped guide pipe, the lower end of the T-shaped guide pipe is slidably connected in an annular groove, the annular groove is formed in a connecting ring, two groups of first springs are fixedly connected in the annular groove, and the other end of each first spring is fixedly connected with the T-shaped guide pipe.
Preferably, a T-shaped limit groove is formed in the lower end of the positioning ring, an I-shaped rod is connected in the T-shaped limit groove in a sliding mode, the lower end of the I-shaped rod is connected in the positioning groove in a sliding mode, a second spring is fixedly connected in the positioning groove, and the other end of the second spring is fixedly connected with the I-shaped rod.
Preferably, a screw is movably connected in the upper end of the clamping ring, hooks are fixedly connected around the lower end of the clamping ring, and the upper end of the steel wire rope is mutually clamped with the hooks.
Compared with the prior art, the low-speed high-torque motor has the beneficial effects that the clamping ring is clamped into the motor mounting hole and the hook is connected with the steel wire rope, the T-shaped ring belt can drive the take-up pulley to start rotating through the rotation of the motor rotating shaft in the low-speed high-torque motor body, the take-up pulley enables the low-speed high-torque motor body to move upwards when the steel wire rope is wound, the T-shaped ring can move downwards and drive the connecting teeth to start rotating when the lower end of the cableway motor mounting frame of the ring to be positioned contacts, the nut can rotate and screw the screw rod through the rotation of the connecting teeth, and the low-speed high-torque motor body and the cableway motor mounting frame are fixed together at the moment when the positioning ring moves to the lowest position, so that the low-speed high-torque motor body can be mounted without a crane, and the quick fixing of the low-speed high-torque motor body can be realized.
Drawings
FIG. 1 is a schematic cross-sectional view of the present invention;
FIG. 2 is a schematic diagram of a cross-sectional structure of the connection relationship between a low-speed high-torque motor body and a connecting ring;
FIG. 3 is a schematic diagram of a three-dimensional structure of the connection relationship between a T-shaped ring and a positioning ring according to the present invention;
FIG. 4 is a schematic diagram of a front view of the present invention;
fig. 5 is a schematic diagram of the connection relation structure between the low-speed high-torque motor body and the cableway motor mounting frame.
In the figure, a low-speed large-torque motor body, a connecting ring, a connecting groove, a4, a wire winding wheel, a5, a positioning ring, a6, a motor rotating shaft, a7, a steel wire rope, an 8, a hook, a9, a clamping ring, a10, a screw, a 11, a T-shaped ring, a 12, a connecting tooth, a 13, a nut, a 14, a first spring, a 15, a T-shaped guide tube, a 16, a T-shaped limit groove, a 17, a screw mounting hole, a 18, an annular groove, a 19, a positioning groove, a 20, a bevel gear, a 21, a second spring, a 22, an I-shaped rod, a 23, a limit groove, a 24, a limit block, a 25, a guide ring, a 26, a guide groove, a 27, a slide block, a 28, a slide groove, a 29, a cableway motor mounting frame, a 30, an inclined tooth, a 31, a tooth, a 32, a storage groove, and an adjusting screw.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1-5, the present invention provides a technical solution:
Example 1:
The utility model provides a low-speed high-torque permanent magnet direct-drive motor convenient to fix, including low-speed high-torque motor body 1, low-speed high-torque motor body 1 upper end swing joint has motor pivot 6, make low-speed high-torque motor body 1 drive motor pivot 6 begin to rotate through external power supply, can drive holding ring 5 synchronous rotation through motor pivot 6's rotation, connecting ring 2 has been fixedly cup jointed in low-speed high-torque motor body 1 outside, connecting groove 3 has been seted up in connecting ring 2, T type ring 11 has been slidingly connected in connecting groove 3, T type ring 11 upper end stretches out connecting ring 2, and fixedly connected with holding ring 5, holding ring 5 movably cup joints in motor pivot 6 outside, T type ring 11 outside has seted up a plurality of sets of tooth 31, T type ring 11 outside middle part has been seted up a plurality of inclined tooth 30, holding ring 5 rotates and drives its lower extreme connected T type ring 11 and begins to rotate, T type ring 11 begins to rotate through inclined tooth 30 drives conical gear 20 in the in-process of rotation, conical gear 20 rotates and drives wire reel 4 and begins to rotate, four sets of wire rope reel 4 synchronous rotation begin to move upwards to corresponding motor 1 at this moment high-speed high torque;
The periphery of the outer side of the T-shaped ring 11 is provided with a bevel gear 20, a plurality of groups of inclined teeth 30 are meshed with the bevel gear 20, the bevel gear 20 is movably connected in the T-shaped ring 11, when the T-shaped ring 11 moves downwards, the bevel gear 20 is driven to synchronously move downwards, the bevel gear 20 moves downwards to drive the take-up pulley 4 to move downwards, at the moment, a sliding block 27 moves downwards synchronously along a sliding groove 28, the take-up pulley 4 is fixedly connected with one side of the bevel gear 20 far away from the T-shaped ring 11, a steel wire rope 7 is wound in the take-up pulley 4, the upper end of the steel wire rope 7 extends out of the connecting ring 2 and is movably connected with the clamping ring 9, the clamping ring 9 is clamped to the upper end of a motor mounting hole formed in a cableway motor mounting frame 29, after the installation is finished, four groups of steel wire ropes 7 positioned in the upper end of a low-speed high-torque motor body 1 are clamped into corresponding hooks 8, after the clamping is finished, the low-speed high-torque motor body 1 is connected with an external power supply to enable the motor rotating shaft 6 to start rotating, at the moment, the low-speed high-torque motor body 1 starts to move upwards, a nut 13 is arranged on the lower side of the T-shaped ring 11, the nut 13 is movably connected in the connecting ring 2, a plurality of groups of connecting teeth 12 are arranged in the outer side of the nut 13, the teeth on the side face of the T-shaped ring 11 are meshed with the plurality of groups of connecting teeth 12 when moving downwards, at the moment, the nut 13 starts to rotate, the screw rod 10 is screwed into the nut 13 in the rotating process, and when the positioning ring 5 descends to a final position, four groups of screw rods 10 are screwed into the corresponding nut 13, at the moment, the low-speed high-torque motor body 1 is fixed.
Example 2:
On the basis of embodiment 1, in order to make the low-speed high-torque motor body 1 installed, the motor rotating shaft 6 will not drive the positioning ring 5 to rotate in the rotating process, and simultaneously ensure that the positioning ring 5 can move to the highest point in the normal state, one side of the positioning ring 5, which is close to the motor rotating shaft 6, is movably connected with four groups of limiting blocks 24, the limiting blocks 24 are slidingly connected in the limiting grooves 23, the limiting grooves 23 are formed in the motor rotating shaft 6, one side, which is far away from the motor rotating shaft 6, of the limiting blocks 24 is provided with a containing groove 32, the containing groove 32 is formed in the positioning ring 5, one side, which is close to the containing groove 32, of the limiting blocks 24 is fixedly connected with an adjusting screw 33, the adjusting screw 33 is movably connected in the positioning ring 5, and the adjusting screw 33 rotates to enable the limiting blocks 24 to be separated from the limiting grooves 23 and enter into the containing groove 32, and at the moment, the motor rotating shaft 6 will not drive the positioning ring 5 to rotate in the rotating process;
The wire take-up pulley 4 is movably connected in the sliding block 27 at one side far away from the bevel gear 20, the sliding block 27 is slidably connected in the sliding groove 28, the sliding groove 28 is formed in the connecting groove 3, the upper end and the lower end of the nut 13 are fixedly connected with the guide rings 25, the guide rings 25 are slidably connected in the guide grooves 26, the guide grooves 26 are formed in the connecting ring 2, the nut 13 drives the guide rings 25 connected with the upper end and the lower end of the nut to start rotating in the rotating process, the nut 13 can be limited by moving along the guide grooves 26 through the guide rings 25, screw mounting holes 17 are formed in the upper side and the lower side of the nut 13, and the screw mounting holes 17 are formed in the connecting ring 2;
The upper side of the screw mounting hole 17 is provided with a T-shaped guide tube 15, the lower end of the T-shaped guide tube 15 is connected in an annular groove 18 in a sliding manner, the annular groove 18 is arranged in a connecting ring 2, two groups of first springs 14 are fixedly connected in the annular groove 18, the other ends of the first springs 14 are fixedly connected with the T-shaped guide tube 15, a T-shaped limit groove 16 is arranged in the lower end of a locating ring 5, an I-shaped rod 22 is connected in the T-shaped limit groove 16 in a sliding manner, the lower end of the I-shaped rod 22 is connected in a locating groove 19 in a sliding manner, a second spring 21 is fixedly connected in the locating groove 19, the other ends of the second springs 21 are fixedly connected with the I-shaped rod 22, the I-shaped rod 22 moves upwards and drives the locating ring 5 to synchronously move under the elastic force of the second spring 21, the screw 10 is movably connected in the upper end of the clamping ring 9, hooks 8 are fixedly connected around the lower end of the clamping ring 9, and the upper ends of the steel wire rope 7 are mutually clamped with the hooks 8.
The working principle is that when the cable car is used, the clamping ring 9 is clamped to the upper end of a motor mounting hole formed in a cableway motor mounting frame 29, four groups of steel wire ropes 7 positioned in the upper end of a low-speed high-torque motor body 1 are clamped into corresponding hooks 8 after the installation is completed, the low-speed high-torque motor body 1 is connected with an external power supply to enable a motor rotating shaft 6 of the low-speed high-torque motor body to start rotating after the clamping is completed, the motor rotating shaft 6 rotates to drive a positioning ring 5 to start rotating, the positioning ring 5 rotates to drive a T-shaped ring 11 connected with the lower end of the positioning ring to start rotating, the T-shaped ring 11 drives a bevel gear 20 to start rotating through an inclined tooth 30 in the rotating process, the bevel gear 20 rotates to drive a take-up pulley 4 to start rotating, the four groups of take-up pulleys 4 synchronously rotate to start winding corresponding steel wire ropes 7, at the moment, and the T-shaped guide pipe 15 can play a guiding role on a screw 10 in the process of moving upwards when the low-speed high-torque motor body 1 moves upwards, the lower end of the screw 10 enters into the screw mounting hole 17 to be stored, and the upper end of the positioning ring 5 is in contact with the lower end of the cableway motor body 29 at the moment, and the high-speed high torque motor body is not in contact with the high-speed high torque 1 at the moment;
The positioning ring 5 is pressed to move inwards and drives the T-shaped ring 11 to move synchronously, the bevel gear 20 moves downwards synchronously in the downward moving process of the T-shaped ring 11, so that the low-speed high-torque motor body 1 can always move upwards, the teeth on the side face of the T-shaped ring 11 are meshed with a plurality of groups of connecting teeth 12 in the downward moving process, the nut 13 starts to rotate, the screw rod 10 is screwed into the nut 13 in the rotating process of the nut 13, when the positioning ring 5 descends to a final position, four groups of screw rods 10 are screwed into the relative nut 13, the low-speed high-torque motor body 1 is fixed, the limiting block 24 is separated from the limiting groove 23 by rotating the adjusting screw rod 33 and enters the containing groove 32, and the motor rotating shaft 6 does not drive the positioning ring 5 to rotate when rotating.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (4)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310508448.3A CN116526729B (en) | 2023-05-06 | 2023-05-06 | A low-speed, high-torque permanent magnet direct-drive motor that is easy to fix |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310508448.3A CN116526729B (en) | 2023-05-06 | 2023-05-06 | A low-speed, high-torque permanent magnet direct-drive motor that is easy to fix |
Publications (2)
| Publication Number | Publication Date |
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| CN116526729A CN116526729A (en) | 2023-08-01 |
| CN116526729B true CN116526729B (en) | 2025-02-07 |
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| CN202310508448.3A Active CN116526729B (en) | 2023-05-06 | 2023-05-06 | A low-speed, high-torque permanent magnet direct-drive motor that is easy to fix |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109861423A (en) * | 2018-12-27 | 2019-06-07 | 北京迈格电机科技有限公司 | A kind of disc type low-speed big magneto |
| CN115784011A (en) * | 2022-11-28 | 2023-03-14 | 崔久红 | Hoisting system and hoisting method for disassembling and assembling generator set |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016026214A1 (en) * | 2014-08-21 | 2016-02-25 | 江西工埠机械有限责任公司 | Low speed and high torque electric motor outer rotor, electric motor and related crane |
| CN204297902U (en) * | 2014-11-21 | 2015-04-29 | 湖南云箭科技有限公司 | A kind of water-wheel generator magnetic pole hanging apparatus |
| DE202015101779U1 (en) * | 2015-04-10 | 2015-06-10 | Jiangxi Gongbu Machinery Co., Ltd. | Permanent magnet synchronous direct drive lifting device with a single-stage gear |
| CN205748740U (en) * | 2016-06-07 | 2016-11-30 | 诺霸精密机械(上海)有限公司 | A kind of torsion-testing frame |
| CN111473306B (en) * | 2020-05-26 | 2022-05-06 | 东莞市星耀电子有限公司 | Efficient heat dissipation LED mounting bracket and assembling method thereof |
| CN114249249A (en) * | 2021-12-16 | 2022-03-29 | 安徽春华智能科技有限公司 | Gantry crane for container |
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2023
- 2023-05-06 CN CN202310508448.3A patent/CN116526729B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109861423A (en) * | 2018-12-27 | 2019-06-07 | 北京迈格电机科技有限公司 | A kind of disc type low-speed big magneto |
| CN115784011A (en) * | 2022-11-28 | 2023-03-14 | 崔久红 | Hoisting system and hoisting method for disassembling and assembling generator set |
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| CN116526729A (en) | 2023-08-01 |
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