CN106740745B - Wet braking drive axle of scraper - Google Patents
Wet braking drive axle of scraper Download PDFInfo
- Publication number
- CN106740745B CN106740745B CN201710065930.9A CN201710065930A CN106740745B CN 106740745 B CN106740745 B CN 106740745B CN 201710065930 A CN201710065930 A CN 201710065930A CN 106740745 B CN106740745 B CN 106740745B
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- Prior art keywords
- brake
- friction plate
- wheel
- wet
- cover
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- 230000003068 static effect Effects 0.000 claims abstract description 18
- 230000007246 mechanism Effects 0.000 claims abstract description 15
- 230000005540 biological transmission Effects 0.000 claims abstract description 11
- 238000007667 floating Methods 0.000 claims abstract description 7
- 238000007789 sealing Methods 0.000 claims description 18
- 230000009467 reduction Effects 0.000 claims description 4
- 238000012423 maintenance Methods 0.000 abstract description 6
- 230000002035 prolonged effect Effects 0.000 abstract description 4
- 239000003921 oil Substances 0.000 description 18
- 230000000694 effects Effects 0.000 description 11
- 238000001816 cooling Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 6
- 239000010720 hydraulic oil Substances 0.000 description 6
- 230000007547 defect Effects 0.000 description 3
- 229910001208 Crucible steel Inorganic materials 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T1/00—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles
- B60T1/02—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles acting by retarding wheels
- B60T1/06—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles acting by retarding wheels acting otherwise than on tread, e.g. employing rim, drum, disc, or transmission or on double wheels
- B60T1/065—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles acting by retarding wheels acting otherwise than on tread, e.g. employing rim, drum, disc, or transmission or on double wheels employing disc
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
- B60B35/00—Axle units; Parts thereof ; Arrangements for lubrication of axles
- B60B35/12—Torque-transmitting axles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
- B60B35/00—Axle units; Parts thereof ; Arrangements for lubrication of axles
- B60B35/12—Torque-transmitting axles
- B60B35/16—Axle housings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D66/00—Arrangements for monitoring working conditions, e.g. wear, temperature
- F16D66/02—Apparatus for indicating wear
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2121/00—Type of actuator operation force
- F16D2121/02—Fluid pressure
- F16D2121/04—Fluid pressure acting on a piston-type actuator, e.g. for liquid pressure
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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
- Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
- Y02T10/86—Optimisation of rolling resistance, e.g. weight reduction
Abstract
The invention discloses a wet braking drive axle of a scraper, which comprises a wheel edge speed reducing mechanism, a wet brake, a half axle, a main transmission assembly and an axle housing, wherein the wet brake is provided with a brake housing, a brake spring is arranged in the brake housing, the brake spring enables a piston cover to be pressed on a brake piston ring, the brake cover is connected with and fixes a static friction plate, a dynamic friction plate is arranged at a position corresponding to the static friction plate, a connecting groove is arranged at the outer side of the brake cover, and floating seal is arranged in the connecting groove; the wheel edge speed reducing mechanism is provided with a planetary wheel which is fixed on the planetary wheel carrier through a planetary wheel shaft; the sun gear is fixed on the half shaft, the sun gear drives the planet gears and the planet gear carrier to rotate around the sun gear, the planet gear carrier is fixed on the wheel side shell through bolts, and the planet gear carrier drives the wheel side shell to rotate. According to the scheme, the friction force between the dynamic friction plate and the static friction plate is reduced, the service life of the friction plate is prolonged, the structure is relatively simple, and the use and maintenance costs are low.
Description
Technical Field
The invention relates to a transmission, walking and braking system in engineering machinery, in particular to a wet braking drive axle of a scraper.
Background
The prior art drive axle comprises axle housing, wheel limit reduction gears, wet brake, semi-axis, main speed reduction gears, and wet brake inner structure is simple, and the inside condition that only 1O type circle of stopper does not have the wearing and tearing pilot lever and can not instruct safe handling to there is not friction disc cooling chamber in the stopper inside, and O type circle can wearing and tearing oil leak under long-time operation state, and friction disc temperature is high does not have the cooling, makes friction disc wearing and tearing serious, and braking reliability is low, life is shorter and use maintenance cost is high.
Disclosure of Invention
The invention aims to solve the technical problem of providing a wet brake drive axle of a scraper, which can greatly reduce the friction force between a dynamic friction plate and a static friction plate, prolong the service life of a friction plate device, reduce the requirements on the processing technology and the assembly technology of each part, and has the advantages of relatively simple structure and lower cost of the device and the use and maintenance cost.
In order to solve the technical problems, the invention adopts the following technical means:
the wet brake driving axle of the scraper comprises a wheel edge speed reducing mechanism, a wet brake, a half shaft, a main transmission assembly and an axle housing, wherein the wet brake is fixed on the axle housing through a hollow shaft, a hub housing and an inner gear ring, the wet brake is provided with a brake housing, a brake spring is arranged in the brake housing, one end of the brake spring is propped against the inner side wall of the housing, the other end of the brake spring is propped against the surface of a brake piston cover, the brake spring enables the piston cover to be pressed on a brake piston ring, the brake piston ring is arranged between the brake housing and the brake cover, the brake piston ring is provided with an oil seal, the brake cover is connected and fixed with a static friction plate, a dynamic friction plate is arranged at a position corresponding to the static friction plate, a connecting groove is arranged on the outer side of the brake cover, and floating seal is arranged in the connecting groove; the brake shell is provided with an oil filling hole, an oil return hole and an exhaust hole; the wheel edge speed reducing mechanism is provided with a planetary wheel which is fixed on a planetary wheel carrier through a planetary wheel shaft; the sun gear is fixed on the half shaft, the sun gear drives the planet gears and the planet gear carrier to rotate around the sun gear, the planet gear carrier is fixed on the wheel side shell through bolts, and the planet gear carrier drives the wheel side shell to rotate.
When the vehicle needs to walk, the hydraulic oil for releasing the braking enters the bottom of the piston ring of the brake through the oil duct to push the hydraulic oil and the piston cover of the brake to move towards the braking spring until the movable friction plate is not limited by pressure and can be driven by the wheel side shell to rotate freely. When the vehicle is required to be braked and parked, the hydraulic oil for releasing the brake is released, the brake spring can instantly release the spring force, and the brake piston ring is pressed against the brake piston cover to move until the movable friction plate and the static friction plate are pressed, the movable friction plate is not moved due to the fact that the movable friction plate is pressed, the wheel side shell is connected with the movable friction plate, accordingly, the wheel side shell is enabled to be static, the whole wheel side speed reducing mechanism is driven to be static, and the braking effect is achieved.
The invention has the beneficial effects that: the axle housing is cast by cast steel, has good rigidity and large bearing capacity, and places the braking point on the wheel side shell, so that the relative rotation speed between the movable friction plate and the static friction plate is reduced to one fourth of the rotation speed of the braking sun wheel, therefore, the friction force between the movable friction plate and the static friction plate is greatly reduced, the service life of the friction plate device is prolonged, the requirements on the processing technology and the assembling technology of each part are reduced, in addition, the device has a relatively simple structure, and the cost of the device and the cost of use and maintenance are low.
A further preferred technical scheme is as follows:
the brake shell on be equipped with the keyhole, be equipped with the wear indication pole in the keyhole, the one end cover of wear indication pole is in the keyhole, the other end of wear indication pole is connected with the brake piston lid.
The wear indication rod on the brake can indicate the safe use condition, and the wear condition can be marked by the change of the length of the outer end surface of the wear indication rod exposed out of the adjusting nut. If the exposed distance between the outer end surface of the wear indicating rod and the bolt hole is lower than the set value, the brake friction plate can be used after being replaced.
The wheel side wet type brake assembly is fixed on the axle housing through a hollow shaft and a stud bolt, and the main transmission assembly is fixed on the axle housing through the stud bolt; the wheel edge speed reducing mechanism is connected with the main transmission assembly through a half shaft.
The oil seal is an O-shaped ring, the O-shaped ring is provided with a wear-resistant ring, sealing grooves are arranged at corresponding positions of the inner sides of the brake shell and the brake cover, and the O-shaped ring and the wear-resistant ring are arranged in the sealing grooves.
The sealing of the brake adopts the matching sealing of an O-shaped ring and a wear-resistant ring, the O-shaped ring is placed in a sealing groove on the inner sides of a brake shell and a brake cover, and then the wear-resistant ring is placed on the surface.
When the brake piston ring moves, the 2O-shaped rings are contacted with the brake piston ring against the 2 wear-resistant rings, so that the sealing effect is outstanding, the O-shaped rings are well protected and cannot be damaged by the reciprocating movement of the brake piston ring, the service life of the O-shaped rings is prolonged, and the sealing effect of the brake is better. In addition, 2O-shaped rings on the inner side of the brake cover are contacted with the inner side wall of the brake piston ring against 2 wear-resisting rings, so that the cooling oil sealing effect is achieved. The 4 seals enable the brake cavity and the cooling cavity to form independent cavities, effectively control the high oil temperature in the brake, solve the problems that the high oil temperature affects the braking effect and the friction plate is seriously worn, and overcome the defects of shorter service life and high use and maintenance cost of the brake device.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a cross-sectional view of the wheel-side reduction mechanism of the present invention.
Fig. 3 is a cross-sectional view of a wet brake of the present invention.
Reference numerals illustrate: 1-a wheel-side speed reducing mechanism; 2-wet brake; 3-half shafts; 4-a main transmission assembly; 5-axle housing; 6-wheel side shell; 7-floating sealing; 8-an inner gear ring; 9-planet wheels; 10-planetary axles; 11-planetary axle sealing; 12-a planet carrier; 13-sun gear; 14-a brake housing; 15-a brake spring; 16-a stopper piston cap; 17-oil seal; 18-brake piston rings; 19-a brake cover; 20-static friction plate; 21-a dynamic friction plate; 22-floating seal; 23-wear indicator stem.
Detailed Description
The invention will be further illustrated with reference to the following examples.
Referring to fig. 1, the wet braking drive axle of the scraper comprises a wheel side speed reducing mechanism 1, a wet brake 2, a half shaft 3, a main transmission assembly 4 and an axle housing 5, wherein an external spline of a wheel side shell 6 on the wheel side speed reducing mechanism 1 is connected with an internal spline of a dynamic friction plate 21 in the wet brake 2, the wheel side wet braking assembly is fixed on the axle housing 5 through a hollow shaft and a stud, and the main transmission assembly 4 is fixed on the axle housing 5 through the stud; the wheel edge speed reducing mechanism 1 is connected with the main transmission assembly 4 through a half shaft 3.
Referring to fig. 2 and 3, the wet brake 2 is fixed on the axle housing 5 through a hollow shaft, a hub housing and an inner gear ring 8, the wet brake 2 is provided with a brake housing 14, a brake spring 15 is arranged in the brake housing, one end of the brake spring 15 is propped against the inner side wall of the housing, the other end of the brake spring 15 is propped against the surface of a brake piston cover 16, the brake spring 15 presses the piston cover against a brake piston ring 18, the brake piston ring 18 is arranged between the brake housing 14 and the brake cover 19, the brake piston ring 18 is provided with an oil seal 17, the brake cover 19 is connected with a fixed static friction plate 20, a movable friction plate 21 is arranged at a corresponding position of the static friction plate 20, a connecting groove is arranged on the outer side of the brake cover 19, and a floating seal 22 is arranged in the connecting groove; the brake shell 14 is provided with an oil filling hole, an oil return hole and an exhaust hole; the wheel-side speed reducing mechanism 1 is provided with a planetary gear 9, the planetary gear 9 is fixed on a planetary gear carrier 12 through a planetary gear shaft 10, and a planetary gear shaft seal 11 is arranged on the planetary gear shaft 10; the sun gear 13 is fixed on the half shaft 3, the sun gear 13 drives the planet gears 9 and the planet carrier 12 to rotate around the sun gear 13, the planet carrier 12 is fixed on the wheel side shell 6 through bolts, the planet carrier 12 drives the wheel side shell 6 to rotate, and the wheel side shell 6 is provided with the floating seal 7.
When the vehicle needs to walk, the hydraulic oil for releasing the braking enters the bottom of the brake piston ring 18 through the oil duct to push the hydraulic oil and the brake piston cover 16 to move towards the brake spring 15 until the movable friction plate 21 is not limited by pressure and can be driven by the wheel rim shell 6 to rotate freely. When the vehicle needs to be braked and parked, the hydraulic oil for releasing the brake is discharged, the brake spring 15 can instantly release the spring force, and the brake piston ring 18 is pressed against the brake piston cover 16 to move until the movable friction plate 21 and the static friction plate 20 are pressed, the movable friction plate 21 is not moved due to the pressing, the wheel rim shell 6 is connected with the movable friction plate, the wheel rim shell 6 is correspondingly kept still, the whole wheel rim speed reducing mechanism 1 is driven to be still, and the braking effect is realized.
The brake housing 14 is provided with a bolt hole, a wear indication rod 23 is arranged in the bolt hole, one end of the wear indication rod 23 is sleeved in the bolt hole, and the other end of the wear indication rod 23 is connected with the brake piston cover 16.
The wear indication rod 23 on the brake can indicate the safe use condition, and the wear condition can be identified by the change of the length of the outer end surface of the wear indication rod 23 exposed out of the adjusting nut. If the exposed distance between the outer end surface of the wear indicator rod 23 and the bolt hole is lower than the set value, the brake friction plate can be used after being replaced.
The oil seal 17 is an O-shaped ring, the O-shaped ring is provided with a wear-resistant ring, sealing grooves are arranged at corresponding positions on the inner sides of the brake shell 14 and the brake cover 19, and the O-shaped ring and the wear-resistant ring are arranged in the sealing grooves.
The seal of the brake is sealed by matching an O-ring and a wear-resistant ring, the O-ring is placed in a sealing groove on the inner side of the brake shell 14 and the brake cover 19, and then the wear-resistant ring is placed on the surface.
When the brake piston ring 18 moves, the 2O-shaped rings are contacted with the brake piston ring 18 against the 2 wear-resistant rings, so that the sealing effect is outstanding, the O-shaped rings are well protected from being damaged by the reciprocating movement of the brake piston ring 18, the service life of the O-shaped rings is prolonged, and the sealing effect of the brake is better. The other 2O-rings on the inner side of the brake cover 19 are contacted with the inner side wall of the brake piston ring 18 against the 2 wear-resisting rings, so as to play a role in sealing cooling oil. The 4 seals enable the brake cavity and the cooling cavity to form independent cavities, effectively control the high oil temperature in the brake, solve the problems that the high oil temperature affects the braking effect and the friction plate is seriously worn, and overcome the defects of shorter service life and high use and maintenance cost of the brake device.
Compared with the prior art, the embodiment has the outstanding beneficial effects that:
the axle housing 5 is cast by cast steel, so that the rigidity is good and the bearing capacity is large; the braking point is placed on the wheel side shell 6, so that the relative rotation speed between the movable friction plate 21 and the static friction plate 20 is reduced to be one fourth of the rotation speed of the braking sun wheel 13, thereby greatly reducing the friction force between the movable friction plate 21 and the static friction plate 20, prolonging the service life of the friction plate device and reducing the requirements on the processing technology and the assembling technology of each part; the brake shell 14 and the brake piston ring 18 are simultaneously sealed, so that the defects that the brake is overheated due to frequent braking, the braking effect is poor and the like are greatly reduced, the braking effect under frequent braking is improved, and the internal structure of the brake is more compact; adopts a totally-enclosed structure, so that the working process is not influenced by weather and environment
Since the above description is only specific embodiments of the present invention, the protection of the present invention is not limited thereto, and any equivalent changes or substitutions of technical features of the present invention will be apparent to those skilled in the art, and are included in the scope of the present invention.
Claims (4)
1. The utility model provides a scraper wet braking transaxle, includes wheel limit reduction gears, wet brake, semi-axis, main drive assembly, axle housing, its characterized in that: the wet brake is provided with a brake shell, a brake spring is arranged in the brake shell, one end of the brake spring is propped against the inner side wall of the shell, the other end of the brake spring is propped against the surface of a brake piston cover, the brake spring enables the piston cover to be pressed on a brake piston ring, the brake piston ring is arranged between the brake shell and the brake cover, an oil seal is arranged on the brake piston ring, the brake cover is connected and fixed with a static friction plate, a dynamic friction plate is arranged at a position corresponding to the static friction plate, a connecting groove is formed in the outer side of the brake cover, and a floating seal is arranged in the connecting groove; the brake shell is provided with an oil filling hole, an oil return hole and an exhaust hole; the wheel edge speed reducing mechanism is provided with a planetary wheel which is fixed on a planetary wheel carrier through a planetary wheel shaft; the sun gear is fixed on the half shaft, the sun gear drives the planet gears and the planet gear carrier to rotate around the sun gear, the planet gear carrier is fixed on the wheel side shell through bolts, and the planet gear carrier drives the wheel side shell to rotate.
2. The scraper wet brake transaxle of claim 1 wherein: the brake shell on be equipped with the keyhole, be equipped with the wear indication pole in the keyhole, the one end cover of wear indication pole is in the keyhole, the other end of wear indication pole is connected with the brake piston lid.
3. The scraper wet brake transaxle of claim 1 wherein: the wheel side wet type brake assembly is fixed on the axle housing through a hollow shaft and a stud bolt, and the main transmission assembly is fixed on the axle housing through the stud bolt; the wheel edge speed reducing mechanism is connected with the main transmission assembly through a half shaft.
4. The scraper wet brake transaxle of claim 1 wherein: the oil seal is an O-shaped ring, the O-shaped ring is provided with a wear-resistant ring, sealing grooves are arranged at corresponding positions of the inner sides of the brake shell and the brake cover, and the O-shaped ring and the wear-resistant ring are arranged in the sealing grooves.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710065930.9A CN106740745B (en) | 2017-02-06 | 2017-02-06 | Wet braking drive axle of scraper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710065930.9A CN106740745B (en) | 2017-02-06 | 2017-02-06 | Wet braking drive axle of scraper |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106740745A CN106740745A (en) | 2017-05-31 |
| CN106740745B true CN106740745B (en) | 2023-06-09 |
Family
ID=58956126
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710065930.9A Active CN106740745B (en) | 2017-02-06 | 2017-02-06 | Wet braking drive axle of scraper |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106740745B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108426024A (en) * | 2018-02-11 | 2018-08-21 | 意宁液压股份有限公司 | Dynamic brake and the integrated transmission device of planetary reduction gear |
| CN115556514A (en) * | 2022-09-14 | 2023-01-03 | 安徽中汉机械有限公司 | Pneumatic driving and parking integrated wet braking and planetary reduction wheel-side drive axle for mining truck |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3900075A1 (en) * | 1989-01-03 | 1990-07-12 | Magyar Vagon Es Gepgyar | WHEEL HEAD FOR VEHICLES |
| DE29820822U1 (en) * | 1998-11-20 | 1999-02-04 | Pintsch Bamag Ag | Brake with manual release device |
| CN101348109B (en) * | 2008-07-30 | 2010-10-06 | 无锡开普动力有限公司 | Braking device of drive axle |
| CN102401134A (en) * | 2011-07-12 | 2012-04-04 | 四川成都成工工程机械股份有限公司 | Wet brake with step sealing structure |
| CN202428636U (en) * | 2011-11-04 | 2012-09-12 | 浙江博创机械有限公司 | Sealant oil cylinder water cooling structure for poly ethylene (PE) pipe fitting injection molding machine |
| CN203472826U (en) * | 2013-09-27 | 2014-03-12 | 徐工集团工程机械股份有限公司科技分公司 | Built-in wet-type brake wheel-side-assemble type drive axle |
| DE102013018946B4 (en) * | 2013-11-12 | 2024-02-29 | Zf Active Safety Gmbh | Electromechanically and hydraulically actuated vehicle brake with optional self-locking |
| CN104047923A (en) * | 2014-05-20 | 2014-09-17 | 苏州好特斯模具有限公司 | Oil cylinder cap for multiple-sealing oil cylinder |
| CN205047566U (en) * | 2015-08-26 | 2016-02-24 | 常州市顺景油缸有限公司 | Miniature middle and low voltage hydro -cylinder |
| CN105526365B (en) * | 2015-12-25 | 2017-12-12 | 中车戚墅堰机车车辆工艺研究所有限公司 | Rotary seal structure |
| CN205371641U (en) * | 2015-12-25 | 2016-07-06 | 中车戚墅堰机车车辆工艺研究所有限公司 | Rotary seal structure |
| CN206446579U (en) * | 2017-02-06 | 2017-08-29 | 莱州亚通重型装备有限公司 | A kind of scraper wet-type braking driving axle |
-
2017
- 2017-02-06 CN CN201710065930.9A patent/CN106740745B/en active Active
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| CN106740745A (en) | 2017-05-31 |
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Denomination of invention: A Wet Brake Drive Bridge for Scraper Effective date of registration: 20231113 Granted publication date: 20230609 Pledgee: China Everbright Bank Limited by Share Ltd. Yantai branch Pledgor: LAIZHOU YATONG HEAVY EQUIPMENT Co.,Ltd. Registration number: Y2023980065391 |