CN107696797B - Design method of rear axle assembly of dump truck - Google Patents

Design method of rear axle assembly of dump truck Download PDF

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Publication number
CN107696797B
CN107696797B CN201711060096.0A CN201711060096A CN107696797B CN 107696797 B CN107696797 B CN 107696797B CN 201711060096 A CN201711060096 A CN 201711060096A CN 107696797 B CN107696797 B CN 107696797B
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rear axle
suspension cylinder
axle housing
assembly
cylinder body
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CN107696797A (en
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罗朋
郭世均
廖宝江
林羽
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Guangzhou Electrical Locomotive Co Ltd
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Guangzhou Electrical Locomotive Co Ltd
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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
    • B60B35/163—Axle housings characterised by specific shape of the housing, e.g. adaptations to give space for other vehicle elements like chassis or exhaust system
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G13/00—Resilient suspensions characterised by arrangement, location or type of vibration dampers
    • B60G13/02—Resilient suspensions characterised by arrangement, location or type of vibration dampers having dampers dissipating energy, e.g. frictionally
    • B60G13/06—Resilient suspensions characterised by arrangement, location or type of vibration dampers having dampers dissipating energy, e.g. frictionally of fluid type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K17/00—Arrangement or mounting of transmissions in vehicles
    • B60K17/22—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or type of main drive shafting, e.g. cardan shaft
    • B60K17/24—Arrangements of mountings for shafting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K7/00—Disposition of motor in, or adjacent to, traction wheel
    • B60K7/0007—Disposition of motor in, or adjacent to, traction wheel the motor being electric
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D7/00—Steering linkage; Stub axles or their mountings
    • B62D7/20—Links, e.g. track rods
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F30/00—Computer-aided design [CAD]
    • G06F30/10—Geometric CAD
    • G06F30/15—Vehicle, aircraft or watercraft design

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transportation (AREA)
  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Combustion & Propulsion (AREA)
  • Chemical & Material Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Computational Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Mathematical Analysis (AREA)
  • Mathematical Optimization (AREA)
  • Pure & Applied Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • Evolutionary Computation (AREA)
  • General Engineering & Computer Science (AREA)
  • Braking Arrangements (AREA)
  • Vehicle Body Suspensions (AREA)

Abstract

A design method of a rear axle assembly of a dump truck comprises the steps of determining a swing angle of a rear axle housing, determining a swing angle of a rear suspension cylinder body, determining a swing angle of a transverse pull rod body, determining a deflection angle of the rear axle housing, determining a deflection angle of the rear suspension cylinder body, determining a deflection angle of the transverse pull rod body, and designing the rear axle assembly of the dump truck according to the determined parameters and parameter requirements.

Description

Design method of rear axle assembly of dump truck
Technical Field
The invention relates to a design method of a rear axle assembly of a dump truck.
Background
At present, the structure of the rear axle assembly of the dump truck still adopts an empirically designed value taking method, and the design cannot be reasonably carried out according to the requirements of actual road condition use scenes.
Disclosure of Invention
The invention aims to provide a dumper rear axle assembly which is reasonable in structural design and convenient to maintain.
In order to solve the technical problem, the invention comprises a rear axle housing assembly, an electric wheel assembly and a tire, wherein the electric wheel assembly is matched with the rear axle housing assembly, the tire is connected with one end of the electric wheel assembly, the electric wheel assembly comprises a brake, a traction motor, a wheel edge reducer and a dust cover, the rear axle housing assembly comprises a rear axle housing, a tripod, a suspension cylinder seat and a cross pull rod seat are arranged on the rear axle housing, the rear axle housing is of a hollow structure, the electric wheel assembly penetrates through the rear axle housing, a motor air duct opening and a rear axle maintenance opening are also arranged on the rear axle housing, a first mounting seat is arranged at the lower end of the rear axle maintenance opening, a rear axle door opening is hinged on the first mounting seat, a step is arranged on the surface of the rear axle door assembly facing the rear axle maintenance opening, a fixing device capable of fixing the rear axle door and enabling the rear axle door to cover the rear axle maintenance opening is arranged at the upper end of the rear axle housing and positioned at the rear axle maintenance opening, the rear suspension cylinder body is arranged on the suspension cylinder seat, the cross pull rod body is arranged on the cross pull rod seat, and the bearing connecting seat is arranged on the tripod.
As a further improvement of the invention, the brake comprises a service brake and a parking brake, a brake disc is arranged at the position of the electric wheel assembly corresponding to the brake, a dust cover covers the service brake, the parking brake and the brake disc, the service brake comprises service brake caliper components arranged at two sides of the brake disc, the service brake caliper components comprise an inner service brake caliper cover plate and an outer service brake caliper cover plate which are arranged in parallel, a fixed seat connected with the inner service brake caliper cover plate is arranged on the electric wheel frame body, the inner service brake caliper cover plate and the outer service brake caliper cover plate are connected through a bolt, a first cavity is formed between the inner service brake caliper cover plate and the outer service brake caliper cover plate, a first piston component is arranged on the inner service brake caliper cover plate and the outer service brake caliper cover plate, a first friction plate is arranged at the driving end of the first piston component, and the first friction plate is positioned, one end of the brake disc is positioned between the two first friction plates.
As a further improvement of the invention, the electric wheel assembly is fixedly connected with the rear axle housing in a bolt connection mode.
The invention provides a design method of a rear axle assembly of a dump truck, which comprises the following steps:
A. determining a swing angle of the rear axle housing: the length of the center distance of the tire from the center of the bearing connecting seat on the tripod is determined as L1The length of the center of the tire from the center of the suspension cylinder seat is L2The no-load length of the rear suspension cylinder body is L3And the full load length of the rear suspension cylinder body is L4The length of the rear suspension cylinder body compressed to the bottom is L5The rear suspension cylinder is stretched to a maximum length L6When fully loaded, the central line of the rear axle housing forms an included angle with the ground
Figure GDA0002153443550000021
Included angle between central line of rear axle housing and ground surface in no-load state
Figure GDA0002153443550000022
When no load, the rear suspension cylinder body is stretched to the longest rear axle housing center line and ground included angle
Figure GDA0002153443550000023
B. Determining the swing angle of the rear suspension cylinder body: when the rear axle housing swings downwards, the swing angle of the rear suspension cylinder body
Figure GDA0002153443550000024
When the rear axle shell swings upwards, the swing angle of the rear suspension cylinder body
Figure GDA0002153443550000025
Wherein L is the length from the center of the bearing connecting seat on the tripod to the center of the suspension cylinder seat;
C. determining the swing angle of the tie rod body: the length of the cross-pull rod body is set to be L7When the rear suspension cylinder body is compressed to the limit from full load and static, the included angle between the transverse pull rod body and the ground
Figure GDA0002153443550000031
When the dump truck is in idle load and is static, the included angle between the cross pull rod body and the ground
Figure GDA0002153443550000032
D. Determining the deflection angle of the rear axle housing: when the tie rod body swings downwards to the limit, the deflection angle of the rear axle shell
Figure GDA0002153443550000033
When the tie rod body swings upwards to the limit, the deflection angle of the rear axle shell
Figure GDA0002153443550000034
E. Determining the deflection angle of the rear suspension cylinder body: the deflection angles in two limit directions of the rear suspension cylinder body are respectively as follows:
Figure GDA0002153443550000035
F. determining the deflection angle of the tie rod body: the two limit direction deflection angles of the tie rod body are respectively as follows:
Figure GDA0002153443550000036
G. and designing the rear axle assembly of the dump truck according to the determined parameters and the parameter requirements.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic structural view of the brake of the present invention.
FIG. 3 is a block diagram of the rear axle housing assembly of the present invention.
FIG. 4 is a front view of the service caliper assembly of the present invention.
Fig. 5 is a partial cross-sectional view of a first piston assembly of the present invention.
Detailed Description
As shown in fig. 1 to 5, the rear axle housing comprises a rear axle housing assembly, an electric wheel assembly and tires, wherein the electric wheel assembly is matched with the rear axle housing assembly, the tires are connected with one end of the electric wheel assembly, the electric wheel assembly comprises a brake disc 2, a brake, a traction motor, a wheel reduction gear and a dust cover, the rear axle housing assembly comprises a rear axle housing body, a tripod, a suspension cylinder seat and a cross-pull rod seat are arranged on the rear axle housing body, the tripod and the suspension cylinder seat are oppositely arranged, the cross-pull rod seat is arranged above the tripod and the suspension cylinder seat, the number of the suspension cylinder seats is two, the rear axle housing body is of a hollow structure, the electric wheel assembly penetrates through the rear axle housing body, a motor air duct opening and a rear axle opening are arranged on the rear axle housing body for maintenance, a first mounting seat is arranged at the lower end of the rear axle maintenance opening and is hinged with the rear axle door assembly, the rear axle door assembly is provided with a step ladder on the surface facing the rear axle maintenance through hole, the upper end of the rear axle shell and positioned at the rear axle maintenance through hole is provided with a fixing device which can fix the rear axle door assembly and enable the rear axle door assembly to cover the rear axle maintenance through hole, the fixing device comprises a fixing base body and a fixing bolt piece, the fixing bolt piece acts on the rear axle door assembly and is connected with the fixing device, the suspension cylinder base is provided with a rear suspension cylinder body, the cross pull rod base is provided with a cross pull rod body, the tripod is provided with a bearing connecting base, the brake comprises driving brake caliper components 3 arranged on two sides of a brake disc 2, the driving brake caliper components 3 comprise two inner driving brake caliper cover plates 4 and outer driving brake caliper cover plates 5 which are arranged in parallel, a fixing base 6 connected with the inner driving brake caliper cover plates 4 is arranged on the electric wheel frame body 1, the inner driving brake caliper cover plates 4 and the outer driving brake, a first cavity 19 is formed between the inner driving brake caliper cover plate 4 and the outer driving brake caliper cover plate 5, a first piston assembly 7 is arranged on the inner driving brake caliper cover plate 4 and the outer driving brake caliper cover plate 5, the first piston assembly 7 comprises a first piston shell 8 and a first pressure rod 9, a first through hole 10 is arranged on the inner driving brake caliper cover plate 4 and the outer driving brake caliper cover plate 5 corresponding to the first pressure rod 9, a first sliding sleeve 11 in sliding fit with the first pressure rod 9 is arranged at the first through hole 10, the first pressure rod 9 penetrates through the first through hole 10, a first sliding chute 12 is arranged in the first piston shell 8, a first groove 13 is arranged on the first pressure rod 9, an inner piston body 14 is arranged in the first groove 13, the upper end of the inner piston body 14 is in sliding fit with the first sliding chute 12, a gasket 15 and an inner piston spring 16 are sleeved on the inner piston body 14, the inner piston spring 16 is arranged between the gasket 15 and the bottom of the first groove 13, an oil inlet 17 is further arranged on the inner driving brake caliper cover plate 4 and the outer driving brake caliper cover plate 5, a first friction plate 18 is arranged at the lower end of a first pressure rod 9 of the first piston assembly 7, the first friction plate 18 is positioned in a first cavity 19, one end of the brake disc 2 is positioned between the two first friction plates 18, the parking brake comprises an inner parking brake caliper cover plate 20 and an outer parking brake caliper cover plate 21, a fixed seat 6 connected with the inner parking brake caliper cover plate 20 is further arranged on the electric wheel frame body 1, the inner parking brake caliper cover plate 20 is connected with the outer parking brake caliper cover plate 21 through a bolt, a second cavity is formed between the inner parking brake caliper cover plate 20 and the outer parking brake caliper cover plate 21, a second piston assembly 22 is arranged on the outer parking brake caliper cover plate 21, a second friction plate is arranged at the driving end of the second piston assembly 22, and is positioned in the, and a second friction plate is arranged on the end surface of the inner parking brake caliper cover plate 20 in the second cavity, and one end of the brake disc 2 is positioned between the two second friction plates.
The braking system is the primary condition for vehicle safety and must have three basic functions: first, the vehicle speed can be reduced to a required value (including zero) with an appropriate deceleration during running. Second, the vehicle is kept at a suitable steady speed while traveling downhill. Third, the vehicle is reliably parked in place (including on a grade). The service brake and the parking brake of the dumper whole vehicle brake realize the functions by acting on the brake disc 2. The first and second friction plates 18, 18 are made to act on the brake disk 2 by changing the positions of the first and second friction plates 18, 22 by supplying oil pressure to the first and second piston assemblies 7, 22. In the first piston assembly 7, because the gasket 15 and the inner piston spring 16 are sleeved on the inner piston body 14, the movement stability of the inner piston body 14 can be ensured, and meanwhile, the first sliding sleeve 11 can ensure the movement stability of the first pressure lever 9 and prevent the first pressure lever 9 from shaking in the movement process. And the rear axle maintenance port is used for maintainers to access devices such as a reduction gear in the rear axle housing. The step ladder on the rear axle door assembly makes things convenient for the maintainer to get into the rear axle maintenance opening. The motor air duct opening is connected with an air duct pipeline, so that the components in the rear axle housing can be cooled. The hub reduction gear adopts an NW form with large transmission power, mainly has the functions of reducing speed and increasing torque, increasing the torque transmitted by the traction motor and providing a rim interface. The dust cover covers the brake to play a role in protection.
The invention also comprises a design method of the rear axle assembly of the dump truck, which comprises the following steps:
A. determining a swing angle of the rear axle housing: the length of the center distance of the tire from the center of the bearing connecting seat on the tripod is determined as L1Wheel ofThe length of the center of the tire from the center of the suspension cylinder seat is L2The no-load length of the rear suspension cylinder body is L3And the full load length of the rear suspension cylinder body is L4The length of the rear suspension cylinder body compressed to the bottom is L5The rear suspension cylinder is stretched to a maximum length L6When fully loaded, the central line of the rear axle housing forms an included angle with the ground
Figure GDA0002153443550000061
Included angle between central line of rear axle housing and ground surface in no-load state
Figure GDA0002153443550000062
When no load, the rear suspension cylinder body is stretched to the longest rear axle housing center line and ground included angle
Figure GDA0002153443550000063
B. Determining the swing angle of the rear suspension cylinder body: when the rear axle housing swings downwards, the swing angle of the rear suspension cylinder body
Figure GDA0002153443550000064
When the rear axle shell swings upwards, the swing angle of the rear suspension cylinder body
Figure GDA0002153443550000071
Wherein L is the length from the center of the bearing connecting seat on the tripod to the center of the suspension cylinder seat;
C. determining the swing angle of the tie rod body: the length of the cross-pull rod body is set to be L7When the rear suspension cylinder body is compressed to the limit from full load and static, the included angle between the transverse pull rod body and the ground
Figure GDA0002153443550000072
When the dump truck is in idle load and is static, the included angle between the cross pull rod body and the ground
Figure GDA0002153443550000073
D. Determining the deflection angle of the rear axle housing: when the tie rod body swings downwards to the limit, the deflection angle of the rear axle shell
Figure GDA0002153443550000074
When the tie rod body swings upwards to the limit, the deflection angle of the rear axle shell
Figure GDA0002153443550000075
E. Determining the deflection angle of the rear suspension cylinder body: the deflection angles in two limit directions of the rear suspension cylinder body are respectively as follows:
Figure GDA0002153443550000076
F. determining the deflection angle of the tie rod body: the two limit direction deflection angles of the tie rod body are respectively as follows:
Figure GDA0002153443550000077
G. designing the rear axle assembly of the dump truck according to the determined parameters and the parameter requirements, wherein the requirement of the rear axle assembly to meet the spatial relationship during the design is as follows:
Figure GDA0002153443550000078
Figure GDA0002153443550000081

Claims (1)

1. a design method of a rear axle assembly of a dump truck is characterized by comprising the following steps: the rear axle assembly of the dump truck comprises a rear axle housing assembly, an electric wheel assembly and a tire, wherein the electric wheel assembly is matched with the rear axle housing assembly, the tire is connected with one end of the electric wheel assembly, the electric wheel assembly comprises a brake, a traction motor, a wheel edge reducer and a dust cover, the rear axle housing assembly comprises a rear axle housing, a tripod, a suspension cylinder seat and a cross pull rod seat are arranged on the rear axle housing, the rear axle housing is of a hollow structure, the electric wheel assembly penetrates through the rear axle housing, a motor air duct opening and a rear axle maintenance opening are also arranged on the rear axle housing, a first mounting seat is arranged at the lower end of the rear axle maintenance opening, a rear axle door assembly is hinged on the first mounting seat, a step is arranged on the surface of the rear axle door assembly, which faces the rear axle maintenance opening, a fixing device capable of fixing the rear axle door assembly and enabling the rear axle door assembly to cover the rear axle maintenance opening is arranged at the upper end of the rear axle housing and positioned at, the rear suspension cylinder body is arranged on the suspension cylinder seat, the transverse pull rod body is arranged on the transverse pull rod seat, and the bearing connecting seat is arranged on the tripod;
the design method comprises the following steps:
A. determining a swing angle of the rear axle housing: the length of the center distance of the tire from the center of the bearing connecting seat on the tripod is determined as L1The length of the center of the tire from the center of the suspension cylinder seat is L2The no-load length of the rear suspension cylinder body is L3And the full load length of the rear suspension cylinder body is L4The length of the rear suspension cylinder body compressed to the bottom is L5The rear suspension cylinder is stretched to a maximum length L6When fully loaded, the central line of the rear axle housing forms an included angle with the ground
Figure FDA0002153443540000011
Included angle between central line of rear axle housing and ground surface in no-load state
Figure FDA0002153443540000012
When no load, the rear suspension cylinder body is stretched to the longest rear axle housing center line and ground included angle
Figure FDA0002153443540000013
B. Determining the swing angle of the rear suspension cylinder body: when the rear axle housing swings downwards, the swing angle of the rear suspension cylinder body
Figure FDA0002153443540000021
When the rear axle shell swings upwards, the swing angle of the rear suspension cylinder body
Figure FDA0002153443540000022
Wherein L is a bearing on the tripodThe length from the center of the connecting seat to the center of the suspension cylinder seat;
C. determining the swing angle of the tie rod body: the length of the cross-pull rod body is set to be L7When the rear suspension cylinder body is compressed to the limit from full load and static, the included angle between the transverse pull rod body and the ground
Figure FDA0002153443540000023
When the dump truck is in idle load and is static, the included angle between the cross pull rod body and the ground
Figure FDA0002153443540000024
D. Determining the deflection angle of the rear axle housing: when the tie rod body swings downwards to the limit, the deflection angle of the rear axle shell
Figure FDA0002153443540000025
When the tie rod body swings upwards to the limit, the deflection angle of the rear axle shell
Figure FDA0002153443540000026
E. Determining the deflection angle of the rear suspension cylinder body: the deflection angles in two limit directions of the rear suspension cylinder body are respectively as follows:
Figure FDA0002153443540000027
F. determining the deflection angle of the tie rod body: the two limit direction deflection angles of the tie rod body are respectively as follows:
Figure FDA0002153443540000028
G. and designing the rear axle assembly of the dump truck according to the determined parameters and the parameter requirements.
CN201711060096.0A 2017-11-01 2017-11-01 Design method of rear axle assembly of dump truck Active CN107696797B (en)

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Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109177670B (en) * 2018-09-07 2020-11-03 广州电力机车有限公司 Rear axle suspension system of dump truck
CN110873119A (en) * 2019-10-25 2020-03-10 广州电力机车有限公司 Dumper rear axle assembly joint bearing assembly, joint bearing installation method and calculation method
CN111609062B (en) * 2020-06-04 2021-09-14 徐州徐工矿业机械有限公司 Installation device for adjusting gap of parking brake, parking brake and mining dump truck
EP4183608A1 (en) 2021-11-23 2023-05-24 Sandvik Mining and Construction Oy A powertrain support arrangement, and a mobile under-ground mining machine

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102320219A (en) * 2011-07-14 2012-01-18 徐工集团工程机械股份有限公司江苏徐州工程机械研究院 Rear axle welding assembly structure for mining dumper with electric wheels
CN105270121A (en) * 2015-11-10 2016-01-27 广州电力机车有限公司 Free wheel rear suspension system for dumper
CN205905667U (en) * 2016-06-24 2017-01-25 湘电重型装备有限公司 Round tipper rear axle device that 300t is mining electronic
CN106740054A (en) * 2016-12-21 2017-05-31 湘电重型装备有限公司 A kind of delivered payload capability is the electric power wheel self-discharging vehicle of 136t

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102320219A (en) * 2011-07-14 2012-01-18 徐工集团工程机械股份有限公司江苏徐州工程机械研究院 Rear axle welding assembly structure for mining dumper with electric wheels
CN105270121A (en) * 2015-11-10 2016-01-27 广州电力机车有限公司 Free wheel rear suspension system for dumper
CN205905667U (en) * 2016-06-24 2017-01-25 湘电重型装备有限公司 Round tipper rear axle device that 300t is mining electronic
CN106740054A (en) * 2016-12-21 2017-05-31 湘电重型装备有限公司 A kind of delivered payload capability is the electric power wheel self-discharging vehicle of 136t

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