CN106121801B - The noise reduction cooling system of electric engineering car - Google Patents
The noise reduction cooling system of electric engineering car Download PDFInfo
- Publication number
- CN106121801B CN106121801B CN201610614152.XA CN201610614152A CN106121801B CN 106121801 B CN106121801 B CN 106121801B CN 201610614152 A CN201610614152 A CN 201610614152A CN 106121801 B CN106121801 B CN 106121801B
- Authority
- CN
- China
- Prior art keywords
- fan
- shaft
- cooling system
- noise
- cooling
- 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
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P5/00—Pumping cooling-air or liquid coolants
- F01P5/02—Pumping cooling-air; Arrangements of cooling-air pumps, e.g. fans or blowers
- F01P5/04—Pump-driving arrangements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P5/00—Pumping cooling-air or liquid coolants
- F01P5/02—Pumping cooling-air; Arrangements of cooling-air pumps, e.g. fans or blowers
- F01P5/06—Guiding or ducting air to, or from, ducted fans
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P7/00—Controlling of coolant flow
- F01P7/02—Controlling of coolant flow the coolant being cooling-air
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/05—Shafts or bearings, or assemblies thereof, specially adapted for elastic fluid pumps
- F04D29/053—Shafts
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The present invention provides a kind of noise reduction cooling system of electric engineering car, including diesel engine, assembled fan spindle nose, cooling fan and cooling system, assembled fan spindle nose connects diesel engine and cooling fan.Assembled fan spindle nose includes drive shaft and fan shaft, and driving is pivotally connected to the driving device of diesel engine.The front end axis of fan shaft can extend into the hollow structure of drive shaft, and front end axis is eccentric shaft structure, and raised eccentric shoe, when fan shaft is inserted into drive shaft, eccentric shoe is extend into the sliding slot of drive shaft.It further include driving device, driving device includes actuator shaft, and one end of actuator shaft is resisted against on the other end of fan shaft, and driving device driving actuator shaft enables its length to adjust.Adjustable low noise cooling system for construction machinery of the invention, it is possible thereby to obtain minimum noise, has the characteristics that convenient for disassembly and assembly, degree of intelligence is high so that noise is adjusted to electrodeless adjustment.
Description
Technical field
The present invention relates to a kind of cooling system more particularly to a kind of low noise cooling systems for electric engineering car.
Background technique
Electric engineering car usually using powerful diesel engine, several big dominant noise sources be diesel engine exhaust noise,
Cooling fan noise, transmission parts noise etc., the silencer with good noise elimination effect can be used in the exhaust noise of diesel engine
To reduce.
Transmission parts noise can be by being fitted close the reduction reached a certain level for device structure.
Cooling fan noise is divided into the noise and cross-ventilation noise that rotation generates, and Rotation Noise is i.e. since cooling fan has
The regularly noise that impact air generates, and cross-ventilation noise is cooling fan sucking/blowout high-speed air flow alluvium
Body or the noise for forming the generations such as vortex.
(fan tip speed 70m/s or more) is under high speed rotation operating condition in cooling fan, and cooling fan noise is made an uproar
Sound clearly, can account for 40% of complete machine noise or more, therefore, solve cooling fan noise to the whole of reduction construction machinery product
Machine noise has very important significance.
The very big reason of cooling fan noise is caused mainly to have cooling fan and the spacing of Diesel Driven axis improper, cold
But fan and cooling system spacing is improper, the spacing of wind scooper and diesel engine is improper and the structural shape of wind scooper is improper etc., this
A little factors usually during engineering truck manufactures, can integrally consider, be tested, and after comprehensive various parameters, provide a ratio
More reasonable spacing so that noise range can receive.
However, due to vibration, aging, loosening etc., can usually make above-mentioned spacing in the daily maintenance of engineering truck
Between change so that noise increases, the noise of cooling system is mainly reduced by two ways at this time: first is that by setting
The cooling fan spindle nose of different length is counted, to change the spacing of cooling fan and diesel engine, cooling system, second is that replacing different thickness
The wind scooper of degree, third is that the wind scooper of replacement different types.But these methods require dismounting cooling fan, cooling system etc.
Component implements large labor intensity, period length, low efficiency.
No matter continually replacing spindle nose, the wind scooper of cooling fan manually for the manufacture of engineering truck or maintenance
Equal components necessarily bring the raising of manufacturing cost and the reduction of efficiency, the unfavorable effects such as maintenance cost increase.
Therefore need a kind of cooling system, not only implement it is simple and convenient, and efficiency improve, high degree of automation.
Summary of the invention
The object of the present invention is to provide a kind of noise reduction cooling systems of electric engineering car with noise regulatory function, specifically
For the present invention adopts the following technical scheme:
A kind of noise reduction cooling system of electric engineering car, including diesel engine, assembled fan spindle nose, cooling fan, wind-guiding
Shade assembly and cooling system, for the cooling fan between diesel engine and cooling system, assembled fan spindle nose connects bavin
Oil machine and cooling fan, wind scooper component are installed on cooling system.The assembled fan spindle nose includes drive shaft and fan
Axis, it is described to drive the driving device for being pivotally connected to diesel engine, it can be rotated by Diesel Driven.One end of the drive shaft is
Hollow structure processes an axially extending sliding slot on the inner wall of the hollow structure.The front end axis of the fan shaft can be with
It extend into the hollow structure, the front end axis is eccentric shaft structure, raised eccentric shoe, when the fan shaft
When being inserted into the drive shaft, the eccentric shoe is extend into the sliding slot, and can freely be slided in the sliding slot.
The other end of the fan shaft is connected with fan.It further include driving device, the driving device includes actuator shaft, the actuator shaft
One end be resisted against on the other end of the fan shaft, the driving device drives the actuator shaft to enable its length
Adjustment.
Further, it is additionally provided with compressed spring in the bottom of the hollow structure of the drive shaft, one end of the compressed spring
The bottom of hollow structure is resisted, the other end resists the front end axis of the fan shaft, which pushes away front end axis application
Power.
Further, the driving device includes motor, and ECU, sensor noise, the sensor noise is for receiving wind
The noise signal of fan, the ECU receives the noise signal, and controls the rotation of motor, and then drives the actuating elongate axis
Or it retracts.
Further, the wind scooper component includes adjustable cabinet, and there is fixation to take for the two sides of the adjustable cabinet
The periphery of sub, the described adjustable cabinet is arranged with retractable wagon, and the other end of the fixed lug extends in the retractable wagon
Outside, there is slideway and fastening screw, the slideway internal receipt has on the retractable wagon outside on the fixed lug
The sliding block of setting, fastening screw are used to that its position to be fixed when retractable wagon stops sliding.
Further, the wind scooper component further includes guide ring and collecting ring, and the adjustable cabinet is fixed on heat dissipation
In system, the guide ring is fixed in adjustable cabinet, and the periphery of guide ring is arranged in the collecting ring.
Further, the internal diameter of the guide ring is 1.03 times of the cooling fan diameter, the guide ring and cooling
The gap of fan is the 1.5%-3% of cooling fan diameter, the length of the guide ring be cooling fan projection width 2/3~
1。
Adjustable low noise cooling system for construction machinery provided by the invention, adjusts fan by noise monitoring in real time
With the distance between diesel engine, guide ring, can make noise is adjusted to electrodeless adjustment, makes an uproar it is possible thereby to obtain minimum
Sound.It is directed to the diesel engine of different model, the axial length of adjustable adjustable cabinet, thus cooling system of the invention simultaneously
The scope of application greatly extended, have the characteristics that convenient for disassembly and assembly, degree of intelligence is high, electrodeless adjustment noise.It can be applied to
Various electric engineering cars, such as electric crane, electric power trailer, power engineering maintenance car construction machinery product.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the noise reduction cooling system of electric engineering car of the invention；
Fig. 2 is the structural schematic diagram of the assembled fan spindle nose of the noise reduction cooling system of electric engineering car of the invention；
Fig. 3 is the structure rough schematic view of the noise reduction cooling system of electric engineering car of the invention；
Fig. 4 is the structural schematic diagram of the driving device of the noise reduction cooling system of electric engineering car of the invention.
Specific embodiment
The present invention is described in detail with reference to the accompanying drawing.
As shown in Figure 1, the noise reduction cooling system of electric engineering car of the invention, including diesel engine 11, assembled fan axis
Head 8-10, cooling fan 7, wind scooper component 2-5 and cooling system 1.
The cooling fan 7 couples bavin by assembled fan spindle nose 8-11 between diesel engine 11 and cooling system 1
Oil machine 11 and cooling fan 7.Wind scooper component is installed on cooling system 1.
Assembled fan spindle nose can realize the adjusting of length, to change cooling fan 7 and diesel engine 11, cooling system 1
Spacing.Wind scooper component includes adjustable cabinet 2, guide ring 5 and collecting ring 6, and the axial length of adjustable cabinet 2 is adjustable.
As shown in Fig. 2, assembled fan spindle nose includes drive shaft 8 and fan shaft 9, which is connected to diesel engine 11
Driving device, can be rotated by Diesel Driven.One end of drive shaft 8 is hollow structure, in the inner wall of the hollow structure
On process an axially extending sliding slot 81.The front end axis 91 of fan shaft 9 can be extend into the hollow structure, the front end
Axis 91 be eccentric shaft structure, raised eccentric shoe 92, when fan shaft 9 is inserted into drive shaft 8, eccentric shoe 92
It extend into sliding slot 81, and can freely be slided in sliding slot, eccentric shoe 92 and sliding slot 81 are interference fit.Daily maintenance
In, often addition lubricating oil is taken, to maintain its smooth sliding.
As a result, when drive shaft 8 rotates, since sliding slot 81 and the cooperation of eccentric shoe 92 are clamped, drive shaft 8 is by band
Dynamic fan shaft 9 rotates.Simultaneously because the presence of eccentric shoe 92, fan shaft 9 will be displaced outwardly along drive shaft 8, thus can be real
Existing the distance between drive shaft 8 and fan 7 are adjustable.
In another embodiment, it is additionally provided with compressed spring in the bottom of the hollow structure of drive shaft 8, the compressed spring
One end resists the bottom of hollow structure, and the other end resists the front end axis 91 of fan shaft 9, which pushes away the application of front end axis 91
Power pushes fan shaft 9 to be displaced outwardly.The compressed spring it is not necessary to, can also be in the presence of eccentric shoe 92
Omit the compressed spring.
Referring to Fig. 3, the other end of fan shaft 9 is connected with fan 7, and actuator shaft 15 is resisted against on the end of fan shaft 9.Especially
, the center at the end of fan shaft 9 can configure a circular groove, be configured with swivel bearing, actuator shaft inside the circular groove
15 are fixedly connected with the swivel bearing.The other end of actuator shaft is connected in driving device 16, and driving device 16 is arranged in cooling
In system 1.
Referring to Fig. 4, which may include motor 19, ECU 17, sensor noise 17.Sensor noise 17 is used for
The noise of fan is received, and passes to ECU 17, ECU 17 receives out the signal of sensor noise 17, and controls turning for motor 19
Dynamic, the rotation of motor 19 will drive the elongation of actuator shaft 15 or retract, to change the distance between fan 7 and diesel engine 11.
Motor 19 can pass through the elongation or retraction of screw rod transmission system drive actuator shaft 15.
For example, ECU 17 controls motor and rotates forward when the signal that sensor noise 17 receives shows that noise is excessive, so that
Brake axle 15 extends, so as to shorten the distance between fan 7 and diesel engine 11.It makes an uproar at this point, sensor noise 17 receives in real time
Sound signal, ECU 17 dynamically control the rotation of motor.Until noise reaches scheduled range.When noise reaches predetermined model
After enclosing, ECU controls motor stalls, and actuator shaft 15 will stop extending, and one end of actuator shaft 15 is fixed on fan shaft always
In bearing.
When diesel engine work, the rotation of drive shaft 8 drives fan shaft 9 to rotate, simultaneously because the effect of centrifugal force, fan
Axis 9 is moved away from the direction of drive shaft 8 always, and the other end of fan shaft 9 is resisted against on brake axle 15, is activated as a result,
The variation of 15 length of axis, so that it may so that the length between drive shaft 8 and fan shaft 9 changes, so that diesel engine 11
The distance between fan 7 changes.
The wind scooper component includes adjustable cabinet 2, guide ring 5 and collecting ring 6, and adjustable cabinet 2 is fixed on heat dissipation
In system 1, cooling system 1 can be such as cooling water radiator.Guide ring 5 is fixed in adjustable cabinet 2, and collecting ring 6 is set
It sets in the periphery of guide ring 6.
Referring to Fig.1, the two sides of the cabinet of adjustable cabinet 2 have the cabinet periphery set of fixed lug 3, adjustable cabinet 2
Equipped with retractable wagon 4, the other end of fixed lug 3 extends in the outside of retractable wagon 4, has slideway and tight on fixed lug 3
Gu screw, slideway internal receipt has the sliding block of retractable wagon 4, therefore retractable wagon 4 can be slided along slideway, to change case
The length of body 2.Fastening screw is used to that its position to be fixed when retractable wagon stops sliding.On two fixed lugs 3
Fixing screws difference is opposed, gives retractable wagon 4 pretightning force from two opposite directions, so that the position of cabinet 4 is fixed up.
In one embodiment, the internal diameter of the guide ring 5 is 1.03 times of 7 diameter of cooling fan, and guide ring 5 is installed on
On adjustable cabinet 2.Collecting ring 6 is installed on the outside of guide ring 5, and realization flows into 7 suckings of cooling fan/blowout air
Row elicitation effect.
Referring to Fig. 2, the spacing a of cooling fan 7 and diesel engine 11, the spacing c with cooling system 1 are adjustable.
In one embodiment, guide ring 5 and the gap & of cooling fan 7 are the 1.5%-3% of 7 diameter of cooling fan, are led
The length l for flowing ring 5 is the 2/3~1 of 7 projection width b of cooling fan, thus cooling fan 7 exposes the depth e of half guide ring 5
It is adjustable.
In engineering truck in use, being adjusted between fan 7 and diesel engine 11, guide ring 5 in real time by noise monitoring
Distance, can make noise is adjusted to electrodeless adjustment, it is possible thereby to obtain minimum noise.Simultaneously for different model
Diesel engine, the axial length of adjustable adjustable cabinet 2, thus the scope of application of cooling system of the invention obtains greatly
Extension.
Finally, it should be noted that embodiment described above is only used to illustrate the technical scheme of the present invention, rather than it is limited
System；Although invention is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: its according to
Can so modify to technical solution documented by previous embodiment, or part of or all technical features are carried out etc.
With replacement；And these modifications or substitutions, technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution
Range.
Claims (5)
1. a kind of noise reduction cooling system of electric engineering car, including diesel engine, assembled fan spindle nose, cooling fan, wind scooper
Component and cooling system, it is characterised in that:
For the cooling fan between diesel engine and cooling system, assembled fan spindle nose connects diesel engine and cooling fan,
Wind scooper component is installed on cooling system；
The assembled fan spindle nose includes drive shaft and fan shaft, and the driving is pivotally connected to the driving device of diesel engine, energy
It is enough to be rotated by Diesel Driven；One end of the drive shaft is hollow structure, processes one on the inner wall of the hollow structure
The axially extending sliding slot of item；
The front end axis of the fan shaft can be extend into the hollow structure, and the front end axis is eccentric shaft structure, be had
The eccentric shoe of protrusion, when the fan shaft is inserted into the drive shaft, the eccentric shoe is extend into the sliding slot,
And it can freely be slided in the sliding slot；
The other end of the fan shaft is connected with fan；
It further include driving device, the driving device includes actuator shaft, and one end of the actuator shaft is resisted against the fan shaft
On the other end, the driving device drives the actuator shaft that its length is adjusted
It is additionally provided with compressed spring in the bottom of the hollow structure of the drive shaft, one end of the compressed spring resists hollow structure
Bottom, the other end resist the front end axis of the fan shaft, which applies thrust to the front end axis.
2. the noise reduction cooling system of electric engineering car as described in claim 1, it is characterised in that: the driving device includes electricity
Machine, ECU, sensor noise, the sensor noise are used to receive the noise signal of fan, and the ECU receives the noise letter
Number, and the rotation of motor is controlled, and then drive the actuating elongate axis or retraction.
3. the noise reduction cooling system of electric engineering car as claimed in claim 1 or 2, it is characterised in that: the wind scooper component
Including adjustable cabinet, the two sides of the adjustable cabinet have fixed lug, the periphery of the adjustable cabinet is arranged with and stretches
Contracting cabinet, the other end of the fixed lug extend in the outside of the retractable wagon, have on the fixed lug slideway and
Fastening screw, the slideway internal receipt have the sliding block being arranged on outside the retractable wagon, and fastening screw is used in expansion box
When body stops sliding, its position is fixed.
4. the noise reduction cooling system of electric engineering car as claimed in claim 3, it is characterised in that: the wind scooper component also wraps
Guide ring and collecting ring are included, the adjustable cabinet is fixed on cooling system, and the guide ring is fixed in adjustable cabinet,
The periphery of guide ring is arranged in the collecting ring.
5. the noise reduction cooling system of electric engineering car as claimed in claim 4, it is characterised in that: the internal diameter of the guide ring is
The gap of 1.03 times of the cooling fan diameter, the guide ring and cooling fan is the 1.5%-3% of cooling fan diameter,
The length of the guide ring is the 2/3~1 of cooling fan projection width.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610614152.XA CN106121801B (en) | 2016-07-29 | 2016-07-29 | The noise reduction cooling system of electric engineering car |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610614152.XA CN106121801B (en) | 2016-07-29 | 2016-07-29 | The noise reduction cooling system of electric engineering car |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106121801A CN106121801A (en) | 2016-11-16 |
| CN106121801B true CN106121801B (en) | 2018-12-28 |
Family
ID=57255392
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610614152.XA Active CN106121801B (en) | 2016-07-29 | 2016-07-29 | The noise reduction cooling system of electric engineering car |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106121801B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112172512A (en) * | 2020-10-14 | 2021-01-05 | 徐州徐工挖掘机械有限公司 | Heat dissipation system of engineering machinery and adjusting method of heat dissipation system |
| CN112483237B (en) * | 2020-12-08 | 2022-01-11 | 湖南行必达网联科技有限公司 | Electric control silicone oil fan control method, device and system and vehicle |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2618203A1 (en) * | 1975-04-28 | 1976-11-25 | Komatsu Mfg Co Ltd | SILENCER COOLER FOR LIQUID-COOLED COMBUSTION ENGINES |
| JPS6153416A (en) * | 1984-08-22 | 1986-03-17 | Nissan Motor Co Ltd | Cooler |
| CN1266476A (en) * | 1998-06-17 | 2000-09-13 | 日立建机株式会社 | Fan device and shroud |
| CN102983677A (en) * | 2012-11-05 | 2013-03-20 | 无锡新大力电机有限公司 | Wheelbase adjustable type fan heat dissipation structure |
| CN104685328A (en) * | 2012-09-28 | 2015-06-03 | 微软公司 | Sensed sound level based fan speed adjustment |
| CN205277589U (en) * | 2015-12-30 | 2016-06-01 | 徐工集团工程机械有限公司 | Adjustable axial distance's radiator wind scooper |
-
2016
- 2016-07-29 CN CN201610614152.XA patent/CN106121801B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2618203A1 (en) * | 1975-04-28 | 1976-11-25 | Komatsu Mfg Co Ltd | SILENCER COOLER FOR LIQUID-COOLED COMBUSTION ENGINES |
| JPS6153416A (en) * | 1984-08-22 | 1986-03-17 | Nissan Motor Co Ltd | Cooler |
| CN1266476A (en) * | 1998-06-17 | 2000-09-13 | 日立建机株式会社 | Fan device and shroud |
| CN104685328A (en) * | 2012-09-28 | 2015-06-03 | 微软公司 | Sensed sound level based fan speed adjustment |
| CN102983677A (en) * | 2012-11-05 | 2013-03-20 | 无锡新大力电机有限公司 | Wheelbase adjustable type fan heat dissipation structure |
| CN205277589U (en) * | 2015-12-30 | 2016-06-01 | 徐工集团工程机械有限公司 | Adjustable axial distance's radiator wind scooper |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106121801A (en) | 2016-11-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| FR2896826B1 (en) | ENGINE SHAFT CONNECTION SYSTEM WITH RETRACTABLE NUT | |
| CN106121801B (en) | The noise reduction cooling system of electric engineering car | |
| CN202560636U (en) | Electronically controlled rotary-blade-adjustable axial-flow fan | |
| CN206592345U (en) | A kind of auxiliary denoising device of cooking-fume exhauster blower system | |
| CN104421209A (en) | regulator structure and centrifugal compressor | |
| CN208600720U (en) | A kind of adjusting center automatically lock electro spindle | |
| CN207386594U (en) | A kind of adjustable rough boring cutter | |
| CN102705438B (en) | A kind of air-cooled diesel engine flywheel with blade | |
| CN104724292B (en) | Duct power set and aircraft | |
| CN205818927U (en) | The noise reduction cooling system of electric engineering car | |
| CN103557179A (en) | Engine water pump and engine | |
| CN212480070U (en) | Speed reducer with heat dissipation function | |
| CN106437870B (en) | Axial flow turbine booster adjustable nozzle assembly | |
| CN112405171A (en) | Energy-concerving and environment-protective car clutch piece processingequipment | |
| CN204061335U (en) | Centrifugal compressor's regulation structure and centrifugal compressor | |
| CN207018460U (en) | A kind of screw rod transmission electric pushrod structure | |
| CN209580211U (en) | A kind of electric mode locking structure of clamping | |
| CN210789249U (en) | High-speed feeding electric spindle | |
| CN213953990U (en) | Cooling fan with variable wind direction | |
| CN202252743U (en) | Device for automatically coating lubricating grease on internal thread of coupling | |
| CN208451367U (en) | The main ramming head mechanism of horizontal outer throwing machine | |
| DE102011086232A1 (en) | Device for adjusting fan blades of fan wheel used for cooling internal combustion engine used in e.g. tractor, has mechanically linked actuating piston arranged with fan blades, which is connected with electric motor via screw | |
| CN215410106U (en) | Heat dissipation mechanism of speed reducer | |
| CN110355386B (en) | High-speed feeding electric spindle | |
| CN221003572U (en) | Braking device for wind driven generator |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |