CN106945462B - Lightweight long-life hub unit assembly - Google Patents

Lightweight long-life hub unit assembly Download PDF

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Publication number
CN106945462B
CN106945462B CN201710152255.3A CN201710152255A CN106945462B CN 106945462 B CN106945462 B CN 106945462B CN 201710152255 A CN201710152255 A CN 201710152255A CN 106945462 B CN106945462 B CN 106945462B
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China
Prior art keywords
bearing
oil seal
hole
hub
ring
Prior art date
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Active
Application number
CN201710152255.3A
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Chinese (zh)
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CN106945462A (en
Inventor
隋景玉
林方军
王国元
张泽杰
王振凯
陈伟峰
李雪亭
邢月鹏
任连璋
刘海华
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Shandong Pengxiang Automobile Co Ltd
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Shandong Pengxiang Automobile Co Ltd
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Priority to CN201710152255.3A priority Critical patent/CN106945462B/en
Publication of CN106945462A publication Critical patent/CN106945462A/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B27/00—Hubs
    • B60B27/001—Hubs with roller-bearings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B27/00—Hubs
    • B60B27/0073—Hubs characterised by sealing means
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/72—Sealings
    • F16C33/76—Sealings of ball or roller bearings
    • F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
    • F16C33/7803—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members suited for particular types of rolling bearings
    • F16C33/7813—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members suited for particular types of rolling bearings for tapered roller bearings
    • 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
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/16—Sealings between relatively-moving surfaces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B2380/00—Bearings
    • B60B2380/10—Type
    • B60B2380/14—Roller bearings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B2900/00—Purpose of invention
    • B60B2900/10—Reduction of
    • B60B2900/111—Weight
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B2900/00—Purpose of invention
    • B60B2900/30—Increase in
    • B60B2900/321—Lifetime
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2326/00—Articles relating to transporting
    • F16C2326/01—Parts of vehicles in general
    • F16C2326/02—Wheel hubs or castors
    • 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 lightweight long-life hub unit assembly which is characterized by comprising a hub (1), an outer bearing (2), an inner bearing (3), a bearing spacer ring (4), an inner oil seal (5), a dustproof oil seal (6), an O-shaped ring (7), an outer oil seal (8), a lock nut (9) and a wheel bolt (10), wherein the hub unit assembly is integrally assembled on a shaft head (11) and realizes rotation through torque provided by a half shaft of a drive axle; the independent cavity lubrication of the inner bearing and the outer bearing is realized, the lubrication quality is improved, the service life is prolonged, the problem of grease waste of the full hub lubrication of a common hub is solved, and the assembly and use cost is reduced; the two bearings are added with the functions of oil seal and seat rings, so that the structure is simplified, the number of parts is reduced, the whole length of the hub assembly is greatly shortened, and the design is light; the dustproof oil seal is dustproof, meanwhile, the inner bearing is additionally provided with a stop limit, the dustproof oil seal has the function of a sequence turning tool, and the design cost is reduced.

Description

Lightweight long-life hub unit assembly
Technical field:
the invention relates to the technical field of heavy truck automobile axles, in particular to a lightweight long-service-life hub unit assembly.
The background technology is as follows:
along with the push of a new national standard GB1589-2016 and the increase of the excessive overload punishment force of the country, the most attention of the heavy truck industry is light weight, and the special attention to the hub unit product is maintenance-free except light weight, namely long-period long service life.
For the traditional hub assembly, the assembly of the upper line is the assembly of one piece such as an oil seal seat ring, an inner bearing, a hub, an outer bearing and the like, so the assembly cannot be called as a hub unit, and the whole hub assembly cannot achieve the maximum tightening axial dimension on the premise of guaranteeing the service life due to the existence of the oil seal seat ring, so the weight of the hub and the shaft head is reduced to the greatest extent.
Oil leakage of the hub is always an industrial problem of the hub unit with the oil lubrication structure; for the hub unit with the grease lubrication structure, the traditional structure is that the whole inner cavity of the hub is communicated, so that grease cannot be kept at the effective position of the bearing for a long time, the lubrication effect of the bearing is guaranteed for a long time, and particularly, the outer bearing without the outer oil seal is more so, a large amount of waste is caused by adopting the measure of filling excessive supplementary grease into the inner cavity of the hub, and the cost is increased.
In addition, the problem of the order-changing tool after the hub unit is assembled, the problem of dust prevention of the bearing in the hub, the problem of mutual isolation of oil and grease in the inner cavity of the hub and the inner cavity of the axle housing and the like become a plurality of problems which plague the arrangement of the prior hub unit scheme, and the improper treatment can lead to the increase of the number of parts and the increase of the weight of the assembly.
The invention comprises the following steps:
the invention aims to overcome the defects of the prior art and provide a lightweight long-service-life hub unit assembly; the problems of poor grease retention, difficult long-term good lubrication and grease waste caused by the wide inner cavity space of the existing axle hub assembly are mainly solved.
The technical scheme of the invention is as follows: the lightweight long-life hub unit assembly is characterized by comprising a hub, an outer bearing, an inner bearing, bearing spacers, an inner oil seal, a dustproof oil seal, O-shaped rings, an outer oil seal, locking nuts, wheel bolts and shaft heads, wherein the number of the bearing spacers is 2, and the bearings consist of bearing outer rings and bearing inner rings; the hub is provided with an inner bearing hole and an outer bearing hole, the outer diameters of the inner bearing and the outer bearing are respectively the same as the bore diameters of the inner bearing and the outer bearing of the hub, the inner bearing and the outer bearing are fixed at the inner bearing hole and the outer bearing hole of the hub through the outer bearing ring, and the inner bearing ring freely rotates on the outer ring; spacer ring holes are respectively arranged on the inner sides of the inner bearing hole and the outer bearing hole of the hub, the outer diameter of the bearing spacer ring is the same as the inner diameter of the spacer ring holes, and 2 bearing spacer rings are respectively and fixedly arranged at the 2 spacer ring holes; the outer sides of the inner bearing hole and the outer bearing hole of the hub are respectively provided with an inner oil seal hole and an outer oil seal hole, the outer diameters of the inner oil seal and the outer oil seal hole are respectively the same as the inner diameters of the inner oil seal hole and the outer oil seal hole of the hub, the inner diameter of the inner oil seal is fixedly arranged at the inner oil seal hole and the outer oil seal hole, the inner diameter of the inner oil seal is the same as the outer diameter of the inner bearing ring, the inner diameter of the inner oil seal is radially rotated on the inner oil seal hole and is matched with the inner ring to form a lip shaft to realize sealing, and the inner diameter of the outer oil seal is the same as the outer diameter of the inner ring of the outer bearing ring, and is radially rotated on the inner oil seal and is matched with the lip shaft to realize sealing; the outer side of an inner oil seal hole of the hub is provided with a dustproof oil seal hole, the outer diameter of the dustproof oil seal is the same as the inner diameter of the dustproof oil seal hole, the dustproof oil seal hole is fixedly arranged at the dustproof oil seal hole, and a gap of 2-3mm exists between the dustproof oil seal hole and an inner bearing in the axial direction; an O-shaped ring hole is formed in the inner ring of the inner bearing, the outer diameter of the O-shaped ring is the same as the inner diameter of the O-shaped ring hole, and the O-shaped ring is fixedly arranged at the O-shaped ring hole; the wheel bolts are mounted and fixed on the large disc surface of the hub through shaft holes in a matched manner; the shaft head is an installation fixing part of the hub unit assembly, the outer diameters of the inner bearing installation part and the outer bearing installation part are respectively the same as the inner diameters of the inner bearing and the outer bearing, and the inner bearing and the outer bearing are fixed; the outer diameter of the shaft head at the dustproof oil seal part is the same as the inner diameter of the dustproof oil seal, and the shaft head and the dustproof oil seal form a lip shaft to be matched for sealing, and the dustproof oil seal radially rotates on the shaft head; the outer diameter of the shaft head at the position matched with the O-shaped ring is larger than the inner diameter of the O-shaped ring, so that the sealing function of the O-shaped ring is realized, and the outer diameter of the shaft head at the position matched with the two bearing spacer rings is smaller than the inner diameter of the shaft head, thereby ensuring that grease can be effectively blocked and friction is not formed; except for the two bearing inner rings, the other parts can radially rotate on the shaft head along with the hub; the hub unit assembly is locked and fixed through the locking nut.
Compared with the prior art, the lightweight long-life hub unit assembly has outstanding substantive characteristics and remarkable progress:
1. in the whole hub cavity, the two spacer rings are increased and the outer oil seal is additionally arranged, so that the inner bearing and the outer bearing of the hub have independent lubricating spaces, high-performance lubricating grease filled in the two independent spaces can be reserved on the surfaces of the bearings for a long time, the bearings always have excellent lubricating effect along with the increase of the using mileage of the vehicle, and long service life of the bearings is realized;
2. through structural adjustment, the oil seal seat ring is canceled, the oil seal is directly matched on the moderately lengthened bearing inner ring, so that the number of parts is directly reduced, the assembly structure is more compact, the axial length of the hub assembly can be furthest reduced on the premise of guaranteeing the service life of the bearing when the assembly is arranged, the weight of the hub, the shaft head and other parts can be furthest reduced, the assembly is furthest realized to be light, and the design requirements of the current industry are met;
3. the realization of the oil sealing and grease sealing functions of the outer oil seal not only compresses the inner cavity space of the outer bearing, but also eliminates the original half-shaft oil seal specially used for oil sealing; in addition, the dustproof oil seal is additionally arranged, so that the dustproof problem of the inner bearing is solved, the axial limit is further added to the inner bearing, and the problem that the inner bearing falls off when the assembly is assembled and then turned is solved.
Description of the drawings:
fig. 1 is a schematic structural view of the present invention.
The specific embodiment is as follows:
for a better understanding and implementation, the present invention is described in detail below with reference to specific examples in conjunction with the accompanying drawings; the examples are given solely for the purpose of illustration and are not intended to limit the scope of the invention.
In the embodiment 1, referring to fig. 1, a hub 1, an outer bearing 2, an inner bearing 3, bearing spacers 4, an inner oil seal 5, a dustproof oil seal 6, an O-shaped ring 7, an outer oil seal 8, a locking nut 9, wheel bolts 10 and a shaft head 11 are manufactured according to design requirements, wherein the number of the bearing spacers 4 is 2, and the bearings 2 and 3 are composed of a bearing outer ring and a bearing inner ring as well as all bearings; the hub 1 is provided with an inner bearing hole and an outer bearing hole, the outer diameters of the inner bearing 3 and the outer bearing 2 are respectively processed to be the same as the inner bearing hole and the outer bearing hole of the hub 1, the inner bearing and the outer bearing hole are fixedly assembled at the inner bearing hole and the outer bearing hole of the hub 1 through the outer bearing ring, and the inner bearing ring freely rotates on the outer ring; spacer ring holes are respectively processed on the inner sides of the inner bearing hole and the outer bearing hole of the hub 1, the outer diameters of the two bearing spacer rings 4 are processed to be the same as the inner diameters of the spacer ring holes, and the two bearing spacer rings 4 are respectively assembled and fixed at the two spacer ring holes; the outer sides of the inner bearing hole and the outer bearing hole of the hub 1 are respectively provided with an inner oil sealing hole and an outer oil sealing hole, the outer diameters of the inner oil seal 5 and the outer oil seal 8 are respectively processed to be the same as the inner diameters of the inner oil sealing hole and the outer oil sealing hole of the hub 1, the inner diameters of the inner oil seal 5 and the inner ring of the inner bearing 3 are processed to be the same as the outer diameters of the inner ring of the inner bearing 3, the inner oil sealing 5 and the outer oil sealing hole can radially rotate on the inner oil sealing hole and form lip shaft fit with the inner ring of the inner bearing 3 to realize sealing, and the inner diameters of the outer oil seal 8 and the outer ring of the outer bearing 2 are processed to be the same as the outer diameters of the inner ring of the outer bearing 2, and the inner oil sealing 5 and the lip shaft fit with the inner ring can radially rotate on the inner oil sealing hole to realize sealing; a dustproof oil seal hole is processed on the outer side of an inner oil seal hole of the hub 1, the outer diameter of the dustproof oil seal 6 is processed to be the same as the inner diameter of the dustproof oil seal hole, and then the dustproof oil seal hole is fixedly arranged at the hole, and a gap of 2-3mm is formed between the dustproof oil seal hole and the inner bearing 3 in the axial direction; an O-shaped ring hole is processed in the inner ring of the inner bearing 3, the outer diameter of the O-shaped ring 7 is processed to be the same as the inner diameter of the O-shaped ring hole, and the O-shaped ring hole is fixedly arranged at the hole; the wheel bolts 10 are assembled and fixed on a large disc surface 12 of the hub 1 through shaft holes in a matching way, so as to be used for installing a brake drum and a wheel later; the shaft head 11 is used as an installation fixing part of the hub unit assembly, the outer diameters of the inner bearing installation part and the outer bearing installation part are respectively processed to be the same as the inner diameters of the inner bearing 3 and the outer bearing 2, then the inner bearing 3 and the outer bearing 2 are assembled and fixed, the outer diameter of the shaft head 11 at the assembly part of the dustproof oil seal 6 is processed to be the same as the inner diameter of the dustproof oil seal 6, and the shaft head and the dustproof oil seal 6 form a lip shaft to be matched for realizing sealing, and the dustproof oil seal 6 can radially rotate on the shaft head 11; the outer diameter of the shaft head 11 at the position matched with the O-shaped ring 7 is processed to be slightly larger than the inner diameter of the O-shaped ring 7 so as to realize the sealing function of the O-shaped ring 7, and the outer diameter of the shaft head 11 at the position matched with the two bearing spacer rings 4 is processed to be slightly smaller than the inner diameters of the two spacer rings so as to ensure that grease can be effectively blocked and friction is not formed; thus, the whole hub assembly can be smoothly assembled on the shaft head 11, and other parts except for the two bearing inner rings can freely rotate along with the hub 1 on the shaft head 11 in the radial direction; finally, the whole hub unit assembly is locked and fixed with a constant tightening torque using the lock nut 9.
When the hub unit assembly with the light weight and the long service life works, firstly, the two bearing spacers 4 are arranged on the hub 1, then after the outer bearing 2 and the inner bearing 3 are coated with proper amounts of high-quality lubricating grease, the inner oil seal 5, the outer oil seal 8 and the dustproof oil seal 6 are respectively pressed on the hub 1, and the dustproof oil seal 6 has axial limit on the inner bearing 3, so that only 1 temporary fastening end cover is added on the end face of the outer bearing 2 and the end face of the hub 1 to be used as a sequence conversion tool, and thus, one hub unit body is formed; after the wheel bolts 10 are used for installing the brake drum on the wheel hub unit, the whole wheel hub brake drum assembly can be put on a bridge general assembly line for bridge installation; before the axle is installed, after the axle head 11 is wiped clean, firstly, the O-shaped ring 7 is assembled at a specified position on the axle head, then the fastening end cover is disassembled to assemble the whole hub brake drum assembly, the bearing clearance of the outer bearing 2 and the inner bearing 3 is determined by adjusting the torque value of the locking nut 9, the two bearings are adjusted to an optimal assembling state, the locking nut 9 is locked, and finally, the axle shaft is assembled to complete the assembly of the whole axle. After the vehicle is put into use, the two space rings and the inner oil seal and the outer oil seal are arranged, so that the inner bearing and the outer bearing can work and operate in respective spaces with benign lubrication, high-quality lubricating grease added into the two spaces can be kept for a long time, the condition that the two bearings always keep a high-quality lubrication state in the long-term operation and use process can be met, and long-term maintenance, namely long service life, is realized; furthermore, the dustproof effect between the hub 1 and the brake is effectively ensured due to the existence of the dustproof oil seal 6, and sundries such as brake friction scraps are prevented from entering the inner cavity of the hub; the outer oil seal 8 with the oil sealing and grease sealing double lips effectively plays a role in isolating the axle housing cavity from the hub cavity, avoids mutual intrusion and doping of gear oil in the axle housing cavity and grease in the hub cavity, saves a half-axle oil seal which is necessary in the original axle overall structure and plays a role in oil separation, and reduces the product cost; the presence of the O-ring 7 completely avoids the outflow of grease from the hub cavity.

Claims (1)

1. The lightweight long-life hub unit assembly is characterized by comprising a hub (1), an outer bearing (2), an inner bearing (3), bearing spacers (4), an inner oil seal (5), a dustproof oil seal (6), an O-shaped ring (7), an outer oil seal (8), locking nuts (9), wheel bolts (10) and shaft heads (11), wherein the number of the bearing spacers (4) is 2, and the bearings (2) and (3) are both formed by bearing outer rings and bearing inner rings; the hub (1) is provided with an inner bearing hole and an outer bearing hole, the outer diameters of the inner bearing (3) and the outer bearing (2) are respectively the same as the inner bearing hole and the outer bearing hole of the hub (1), the inner bearing and the outer bearing hole of the hub (1) are fixed through a bearing outer ring, and the bearing inner ring freely rotates on the outer ring; spacer ring holes are respectively arranged on the inner sides of the inner bearing hole and the outer bearing hole of the hub (1), the outer diameter of the bearing spacer ring (4) is the same as the inner diameter of the spacer ring holes, and 2 bearing spacer rings (4) are respectively and fixedly arranged at the 2 spacer ring holes; the outer sides of the inner bearing hole and the outer bearing hole of the hub (1) are respectively provided with an inner oil sealing hole and an outer oil sealing hole, the outer diameters of the inner oil seal (5) and the outer oil seal (8) are respectively the same as the inner diameters of the inner oil sealing hole and the outer oil sealing hole of the hub (1), the inner diameter of the inner oil seal (5) is the same as the outer diameter of the inner ring of the inner bearing (3), the inner oil seal radially rotates on the inner oil sealing hole and forms a lip shaft fit with the inner ring of the inner bearing to realize sealing, and the inner diameter of the outer oil seal (8) is the same as the outer diameter of the inner ring of the outer bearing (2), radially rotates on the inner oil sealing hole and forms a lip shaft fit with the inner ring to realize sealing; the outer side of an inner oil seal hole of the hub (1) is provided with a dustproof oil seal hole, the outer diameter of the dustproof oil seal (6) is the same as the inner diameter of the dustproof oil seal hole, the dustproof oil seal hole is fixedly arranged at the dustproof oil seal hole, and a gap of 2-3mm exists between the dustproof oil seal hole and the inner bearing (3) in the axial direction; an O-shaped ring hole is formed in the inner ring of the inner bearing (3), the outer diameter of the O-shaped ring (7) is the same as the inner diameter of the O-shaped ring hole, and the O-shaped ring hole is fixedly arranged at the O-shaped ring hole; the wheel bolts (10) are installed and fixed on a large disc surface (12) of the hub (1) through shaft holes in a matching way; the shaft head (11) is an installation fixing part of the hub unit assembly, the outer diameters of the inner bearing installation part and the outer bearing installation part are respectively the same as the inner diameters of the inner bearing (3) and the outer bearing (2), and the inner bearing (3) and the outer bearing (2) are fixed; the outer diameter of the shaft head (11) at the position of the dustproof oil seal (6) is the same as the inner diameter of the dustproof oil seal (6), and the shaft head and the dustproof oil seal (6) form a lip shaft to be matched to realize sealing, and the dustproof oil seal (6) radially rotates on the shaft head (11); the outer diameter of the shaft head (11) at the position matched with the O-shaped ring (7) is larger than the inner diameter of the O-shaped ring (7), so that the sealing function of the O-shaped ring (7) is realized, and the outer diameter of the shaft head at the position matched with the two bearing spacer rings (4) is smaller than the inner diameter of the shaft head, thereby ensuring that grease can be effectively blocked and friction is not formed; the other parts except the two bearing inner rings can radially rotate on the shaft head (11) along with the hub (1); the hub unit assembly is locked and fixed through a locking nut (9).
CN201710152255.3A 2017-03-15 2017-03-15 Lightweight long-life hub unit assembly Active CN106945462B (en)

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CN106945462B true CN106945462B (en) 2023-05-30

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107618315A (en) * 2017-09-25 2018-01-23 中国第汽车股份有限公司 A kind of commercial vehicle commander changes oil hub assembly and its Method of Adjustment
CN109466247A (en) * 2018-11-30 2019-03-15 汽解放汽车有限公司 A kind of axle shell assembly
CN109707851B (en) * 2019-01-31 2024-03-08 宇晶机器（长沙）有限公司 Contact type sealing device for high-speed bearing box of multi-wire sawing machine

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CN105952802A (en) * 2016-06-16 2016-09-21 山东蓬翔汽车有限公司 Non-maintenance hub unit assembly with brake drum

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Publication number Priority date Publication date Assignee Title
CN102951016A (en) * 2011-08-23 2013-03-06 住友重机械工业株式会社 Wheel driving device
CN105952802A (en) * 2016-06-16 2016-09-21 山东蓬翔汽车有限公司 Non-maintenance hub unit assembly with brake drum

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