CN112413382A - Mine vehicle rear axle assembly circulating lubrication device and lubrication method thereof - Google Patents
Mine vehicle rear axle assembly circulating lubrication device and lubrication method thereof Download PDFInfo
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- CN112413382A CN112413382A CN202011278962.5A CN202011278962A CN112413382A CN 112413382 A CN112413382 A CN 112413382A CN 202011278962 A CN202011278962 A CN 202011278962A CN 112413382 A CN112413382 A CN 112413382A
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- rear axle
- axle assembly
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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
- F16N—LUBRICATING
- F16N7/00—Arrangements for supplying oil or unspecified lubricant from a stationary reservoir or the equivalent in or on the machine or member to be lubricated
- F16N7/38—Arrangements for supplying oil or unspecified lubricant from a stationary reservoir or the equivalent in or on the machine or member to be lubricated with a separate pump; Central lubrication systems
- F16N7/40—Arrangements for supplying oil or unspecified lubricant from a stationary reservoir or the equivalent in or on the machine or member to be lubricated with a separate pump; Central lubrication systems in a closed circulation system
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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
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/0402—Cleaning of lubricants, e.g. filters or magnets
- F16H57/0404—Lubricant filters
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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
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/0405—Monitoring quality of lubricant or hydraulic fluids
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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
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/0434—Features relating to lubrication or cooling or heating relating to lubrication supply, e.g. pumps ; Pressure control
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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
- F16N—LUBRICATING
- F16N29/00—Special means in lubricating arrangements or systems providing for the indication or detection of undesired conditions; Use of devices responsive to conditions in lubricating arrangements or systems
- F16N29/04—Special means in lubricating arrangements or systems providing for the indication or detection of undesired conditions; Use of devices responsive to conditions in lubricating arrangements or systems enabling a warning to be given; enabling moving parts to be stopped
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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
- F16N—LUBRICATING
- F16N39/00—Arrangements for conditioning of lubricants in the lubricating system
- F16N39/06—Arrangements for conditioning of lubricants in the lubricating system by filtration
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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
- F16N—LUBRICATING
- F16N7/00—Arrangements for supplying oil or unspecified lubricant from a stationary reservoir or the equivalent in or on the machine or member to be lubricated
- F16N7/38—Arrangements for supplying oil or unspecified lubricant from a stationary reservoir or the equivalent in or on the machine or member to be lubricated with a separate pump; Central lubrication systems
- F16N7/385—Central lubrication systems
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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
- F16N—LUBRICATING
- F16N39/00—Arrangements for conditioning of lubricants in the lubricating system
- F16N2039/007—Using strainers
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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
- F16N—LUBRICATING
- F16N2210/00—Applications
- F16N2210/04—Vehicles
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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
- F16N—LUBRICATING
- F16N2260/00—Fail safe
- F16N2260/02—Indicating
- F16N2260/08—Pressure
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Quality & Reliability (AREA)
- General Details Of Gearings (AREA)
Abstract
The invention discloses a mine car rear axle assembly circulating lubrication device and a lubrication method thereof, wherein the mine car rear axle assembly circulating lubrication device comprises a first oil pump, a second oil pump and a filter, and an oil inlet pipe is connected between the left side of the top of the rear axle assembly and the bottom of the first oil pump; the top of the first oil pump and the left side of the filter are connected with an oil outlet pipe, the bottom of the filter and the right side of the top of the rear axle assembly are connected with an oil return pipe, and the oil return pipe is connected with the second oil pump; the filter includes the mount pad, with the sealing plug of mount pad top spiro union, with interior oil drum and outer oil drum of mount pad bottom rigid coupling, the installation mouth has been seted up to the inner chamber center department of mount pad, the left side wall and the play oil pipe of installation mouth are linked together, the installation mouth is linked together with the top of interior oil drum. The invention can circularly filter gear oil, prolongs the service life of the gear oil and parts in the rear axle, and solves the technical problems that the gear oil in the prior art has short maintenance and replacement period, the parts in the rear axle can not reach the service life and are damaged in early stage, and the like.
Description
Technical Field
The invention relates to the technical field of lubricating devices, in particular to a circulating lubricating device and a lubricating method for a rear axle assembly of a mining truck.
Background
The rear axle is a drive axle of the mining vehicle, parts such as gears, bearings and the like are arranged in the rear axle and used for transmitting power of an engine and a transmission to a hub, so that the vehicle can run, the internal gears and the bearings have large loads, gear oil lubrication is needed to reduce friction between moving parts and temperature rise caused by friction, and the conventional rear axle of the mining vehicle is lubricated in the following mode:
the gear oil is sealed in a closed volume formed by a rear axle housing, a half axle sleeve and a wheel-side speed reducer, in the running process of a vehicle, friction of moving parts such as gears, bearings and the like can generate tiny particles, the tiny particles and impurities cannot be discharged in time, the abrasion of the parts can be further aggravated by mixing the tiny particles and the impurities in the gear oil, and the service life of the parts is shortened.
Disclosure of Invention
The invention aims to provide a circulating lubricating device for a rear axle assembly of a mining vehicle, which aims to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
mine car rear axle assembly circulating lubrication device includes: the first oil pump, the second oil pump and the filter; the first oil pump is provided with an oil inlet pipe used for being connected with the top of the rear axle assembly and an oil outlet pipe connected with the filter; an oil return pipe used for being connected with the top of the rear axle assembly is arranged at the bottom of the filter and is connected with a second oil pump; the filter includes the mount pad, with the sealing plug of mount pad top spiro union, with interior oil drum and the outer oil drum of mount pad bottom rigid coupling, the installing port has been seted up to the inner chamber center department of mount pad, the left side wall and the play oil pipe of installing port are linked together, the installing port is linked together with the top of interior oil drum, the center department of sealing plug is provided with the connecting rod, the one end rigid coupling that the connecting rod stretched into interior oil drum inner chamber has the filter screen, and the circumference lateral wall of filter screen contacts with the lateral wall of interior oil drum, several oil outlet has been seted up on the interior oil drum of filter screen below, form an oil storage chamber between interior oil drum and the outer oil drum, and the bottom and the scavenge pipe in oil storage chamber are.
Preferably, the resistance alarm is installed on the top right side of sealing plug, and when impurity in the interior oil drum reached and presetted, the gear oil pressure that flows through the filter rose, and the resistance alarm reports to the police.
Preferably, a rotating handle is arranged on the left side of the top of the sealing plug, so that the sealing plug and the mounting seat can be quickly separated.
Preferably, the connecting rod is provided with the sealing bearing at the junction with the sealing plug, can make connecting rod and sealing plug rotate like this and be connected, has reduced the synchronous pivoted possibility of filter screen and sealing plug to play the guard action to the filter screen.
Preferably, the quantity of filter screen is two at least the aperture of filter screen is from the top down steadilys decrease in proper order, two the slope is connected between filter screen and the connecting rod, can realize like this carrying out the multistage separation to the impurity in the gear oil, and separation effect is good, and the filter screen of slope simultaneously also is convenient for the landing of impurity, has reduced the filter screen surface and has piled up the possibility of jam.
Preferably, the circumference lateral wall top of filter screen is provided with keeps off the net, and keeps off net and interior oil drum inside wall parallel, can play the effect of blockking to impurity like this, has also reduced the filter screen simultaneously when taking out, impurity scattered possibility on the filter screen.
The lubricating method applying the circulating lubricating device for the rear axle assembly of the mining vehicle comprises the following using steps:
s1: starting the mining vehicle, sucking gear oil from the rear axle assembly through the oil inlet pipe by the first oil pump in the working process of the mining vehicle to realize oil inlet, and conveying the gear oil into the filter through the oil outlet pipe;
s2: after entering the gear oil purification treatment of the filter for a period of time, finishing the purification treatment;
s3: and the second oil pump conveys the gear oil to the rear axle assembly again through an oil return pipe to finish the purification and backflow of the gear oil.
Compared with the prior art, the invention has the beneficial effects that:
the circulating lubricating device for the rear axle assembly of the mining vehicle can filter gear oil in a circulating manner, and filter screens on the filter can be replaced periodically, so that the service lives of the gear oil and parts inside the rear axle are prolonged, when impurities in an inner oil barrel reach a preset value, the pressure of the gear oil flowing through the filter is increased, and a resistance alarm gives an alarm, so that the problems that in the running process of the vehicle, the impurities such as tiny particles and the like generated by friction of moving parts such as gears, bearings and the like cannot be discharged in time, and whether the gear oil is deteriorated or not cannot be found in time are solved.
The circulating lubricating device of the rear axle assembly of the mining vehicle is in threaded connection with the mounting seat through the sealing plug, so that the filter is convenient to disassemble and assemble, the filter screens can be replaced and cleaned, the service lives of gear oil and parts in the rear axle are prolonged, meanwhile, the hole diameters of the filter screens are sequentially reduced from top to bottom, the two filter screens are connected with the connecting rod in an inclined mode, the impurities in the gear oil can be separated in multiple stages, the separation effect is good, the inclined filter screens are convenient for the impurities to slide down, and the possibility of accumulation and blockage on the surface of the filter screens is reduced; the fender net that sets up parallels with interior oil drum inside wall, can play the effect of blockking to impurity like this, has also reduced the filter screen simultaneously when taking out, impurity scattered possibility on the filter screen.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic view of the filter of the present invention;
in the drawings, 1, a rear axle assembly; 2. a first oil pump; 3. a filter; 31. a sealing plug; 32. a mounting seat; 33. an outer oil drum; 34. an inner oil barrel; 35. a connecting rod; 36. an installation port; 37. an oil storage chamber; 38. an oil outlet hole; 39. a rotation handle; 310. filtering with a screen; 311. blocking the net; 4. an oil inlet pipe; 5. an oil outlet pipe; 6. an oil return pipe; 7. a resistance alarm; 8. sealing the bearing; 9. a second oil pump.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-2, an embodiment of the present invention is provided.
Example one
Mine car rear axle assembly circulating lubrication device includes: the oil filter comprises a first oil pump 2, a second oil pump 9 and a filter 3, wherein an oil inlet pipe 4 is connected between the left side of the top of a rear axle assembly 1 and the bottom of the first oil pump 2, an oil outlet pipe 5 is connected between the top of the first oil pump 2 and the left side of the filter 3, an oil return pipe 6 is connected between the bottom of the filter 3 and the right side of the top of the rear axle assembly 1, the oil return pipe 6 is connected with the second oil pump 9, the filter 3 comprises a mounting seat 32, a sealing plug 31 screwed with the top of the mounting seat 32, an inner oil barrel 34 and an outer oil barrel 33 fixedly connected with the bottom of the mounting seat 32, a rotating handle 39 is arranged on the left side of the top of the sealing plug 31, so that the sealing plug 31 is quickly separated from the mounting seat 32, a mounting port 36 is arranged at the center of an inner cavity of the mounting seat 32, the left side wall of the mounting port 36 is communicated with, connecting rod 35 is provided with sealing bearing 8 with sealing plug 31's junction, can make connecting rod 35 rotate with sealing plug 31 and be connected like this, filter screen 310 and the synchronous pivoted possibility of sealing plug 31 have been reduced, thereby play the guard action to filter screen 310, the one end rigid coupling that connecting rod 35 stretched into interior oil drum 34 inner chamber has filter screen 310, and the circumference lateral wall of filter screen 310 contacts with the lateral wall of interior oil drum 34, several oil outlet 38 has been seted up on the interior oil drum 34 of filter screen 310 below, form an oil storage chamber 37 between interior oil drum 34 and the outer oil drum 33, and the bottom and the oil return pipe 6 of oil storage chamber 37 are linked together.
The lubricating method of the circulating lubricating device applying the rear axle assembly of the mining vehicle comprises the following steps:
s1: starting the mining vehicle, sucking gear oil from the rear axle assembly 1 through the oil inlet pipe 4 by the first oil pump 2 in the working process of the mining vehicle to realize oil inlet, and conveying the gear oil into the filter 3 through the oil outlet pipe 5;
s2: the gear oil enters the filter 3 for purification treatment for a period of time until the purification treatment is finished;
s3: the second oil pump 9 delivers the gear oil to the rear axle assembly 1 again through the oil return pipe 6, and the gear oil purification and backflow are completed.
Example two
The difference between the second embodiment and the first embodiment is that a resistance alarm 7 is installed on the right side of the top of the sealing plug 31, when impurities in the inner oil drum 34 reach preset values, the pressure of the gear oil flowing through the filter 3 rises, and the resistance alarm 7 gives an alarm.
EXAMPLE III
The difference between the third embodiment and the second embodiment lies in that the number of filter screens 310 is two at least, the aperture of two filter screens 310 decreases progressively from top to bottom in proper order, two filter screens 310 and connecting rod 35 are connected in an inclined manner, thus, the impurity in the gear oil can be separated in multiple stages, the separation effect is good, the filter screens 310 that incline simultaneously also facilitate the sliding off of the impurity, the possibility of blockage caused by the accumulation of the surface of the filter screens 310 is reduced, the top of the circumferential side wall of the filter screens 310 is provided with the blocking screen 311, and the blocking screen 311 is parallel to the inner side wall of the inner oil drum 34, thus, the blocking effect on the impurity can be achieved, and the possibility of the impurity scattering on the filter screens 310 when the filter screens 310.
The working principle is as follows: when the vehicle is running, the first oil pump 2 delivers gear oil to the filter 3 through the oil inlet pipe 4 and the oil outlet pipe 5, an inner oil barrel 34 and an outer oil barrel 33 are arranged in the filter 3, the gear oil entering from the oil outlet pipe 5 enters the inner oil barrel 34 through the mounting port 36, the filter screen 310 in the inner oil barrel 34 filters the gear oil, the baffle screen 311 blocks the deposited impurities, the filtered gear oil is pressurized by the second oil pump 9, returns to the rear axle assembly 1 through an oil return pipe 6, a resistance alarm 7 is arranged on the filter 3, when the impurities in the inner oil drum 34 reach the preset value, the pressure of the gear oil flowing through the filter 3 rises, the resistance alarm 7 gives an alarm, and when the filter screen 310 needs to be cleaned or replaced, the rotary handle 39 is held to rotate the sealing plug 31, so that the sealing plug 31 is separated from the mounting seat 32, the connecting rod 35 and the filter screen 310 are integrally taken out, and the disassembly and assembly are completed.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (7)
1. The utility model provides a mining truck rear axle assembly circulating lubrication device which characterized in that includes: a first oil pump (2), a second oil pump (9) and a filter (3); the first oil pump (2) is provided with an oil inlet pipe (4) used for connecting the top of the rear axle assembly (1) and an oil outlet pipe (5) connected with the filter (3); an oil return pipe (6) used for being connected with the top of the rear axle assembly (1) is arranged at the bottom of the filter (3), and the oil return pipe (6) is connected with a second oil pump (9); the filter (3) comprises a mounting seat (32), a sealing plug (31) screwed with the top of the mounting seat (32), an inner oil drum (34) fixedly connected with the bottom of the mounting seat (32) and an outer oil drum (33), a mounting opening (36) is formed in the center of an inner cavity of the mounting seat (32), a left side wall of the mounting opening (36) is communicated with an oil outlet pipe (5), the mounting opening (36) is communicated with the top of the inner oil drum (34), a connecting rod (35) is arranged at the center of the sealing plug (31), a filter screen (310) is fixedly connected to one end of the connecting rod (35) extending into the inner cavity of the inner oil drum (34), the circumferential side wall of the filter screen (310) is in contact with the side wall of the inner oil drum (34), a plurality of oil outlet holes (38) are formed in the inner oil drum (34) below the filter screen (310), and an oil storage cavity (37) is formed between the inner oil drum (, and the bottom of the oil storage cavity (37) is communicated with the oil return pipe (6).
2. The mining vehicle rear axle assembly circulating lubrication device of claim 1, characterized in that: and a resistance alarm (7) is arranged on the right side of the top of the sealing plug (31).
3. The mining vehicle rear axle assembly circulating lubrication device of claim 1, characterized in that: and a rotating handle (39) is arranged on the left side of the top of the sealing plug (31).
4. The mining vehicle rear axle assembly circulating lubrication device of claim 1, characterized in that: and a sealing bearing (8) is arranged at the joint of the connecting rod (35) and the sealing plug (31).
5. The mining vehicle rear axle assembly circulating lubrication device of claim 1, characterized in that: the quantity of filter screen (310) is two at least, two the aperture of filter screen (310) decreases progressively from top to bottom in proper order, two slope connection between filter screen (310) and connecting rod (35).
6. The mining vehicle rear axle assembly circulating lubrication device of claim 1, characterized in that: the top of the circumferential side wall of the filter screen (310) is provided with a baffle net (311), and the baffle net (311) is parallel to the side wall of the inner oil drum (34).
7. The lubricating method of the circulating lubricating device of the rear axle assembly of the mining vehicle as claimed in any one of claims 1 to 6 is characterized in that: comprises the following steps;
s1: starting the mining vehicle, sucking gear oil from the rear axle assembly (1) by the first oil pump (2) through the oil inlet pipe (4) in the working process of the mining vehicle to realize oil inlet, and conveying the gear oil into the filter (3) through the oil outlet pipe (5);
s2: the filter (3) is used for purifying the gear oil;
s3: the second oil pump (9) conveys the gear oil to the rear axle assembly (1) again through the oil return pipe (6) to finish the purification and backflow of the gear oil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011278962.5A CN112413382A (en) | 2020-11-16 | 2020-11-16 | Mine vehicle rear axle assembly circulating lubrication device and lubrication method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011278962.5A CN112413382A (en) | 2020-11-16 | 2020-11-16 | Mine vehicle rear axle assembly circulating lubrication device and lubrication method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112413382A true CN112413382A (en) | 2021-02-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011278962.5A Pending CN112413382A (en) | 2020-11-16 | 2020-11-16 | Mine vehicle rear axle assembly circulating lubrication device and lubrication method thereof |
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| Country | Link |
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| CN (1) | CN112413382A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113028263A (en) * | 2021-04-06 | 2021-06-25 | 山东日发纺织机械有限公司 | Loom, oil circulation system thereof, and oil contamination detection device and method |
| CN113451938A (en) * | 2021-06-09 | 2021-09-28 | 衢州学院 | Auxiliary traction device for electric power cable installation |
| CN116085652A (en) * | 2022-10-20 | 2023-05-09 | 江苏润星辰机械制造有限公司 | Driving axle structure of off-road vehicle |
-
2020
- 2020-11-16 CN CN202011278962.5A patent/CN112413382A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113028263A (en) * | 2021-04-06 | 2021-06-25 | 山东日发纺织机械有限公司 | Loom, oil circulation system thereof, and oil contamination detection device and method |
| CN113451938A (en) * | 2021-06-09 | 2021-09-28 | 衢州学院 | Auxiliary traction device for electric power cable installation |
| CN113451938B (en) * | 2021-06-09 | 2022-05-27 | 衢州学院 | Auxiliary traction device for electric power cable installation |
| CN116085652A (en) * | 2022-10-20 | 2023-05-09 | 江苏润星辰机械制造有限公司 | Driving axle structure of off-road vehicle |
| CN116085652B (en) * | 2022-10-20 | 2023-10-27 | 江苏润星辰机械制造有限公司 | Driving axle structure of off-road vehicle |
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