CN108612835B - Transmission case shell with pressure relief function - Google Patents
Transmission case shell with pressure relief function Download PDFInfo
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- CN108612835B CN108612835B CN201810705258.XA CN201810705258A CN108612835B CN 108612835 B CN108612835 B CN 108612835B CN 201810705258 A CN201810705258 A CN 201810705258A CN 108612835 B CN108612835 B CN 108612835B
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- transmission
- annular
- main body
- shell main
- 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
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/0412—Cooling or heating; Control of temperature
- F16H57/0415—Air cooling or ventilation; Heat exchangers; Thermal insulations
- F16H57/0416—Air cooling or ventilation
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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
- F16H57/02—Gearboxes; Mounting gearing therein
- F16H57/027—Gearboxes; Mounting gearing therein characterised by means for venting gearboxes, e.g. air breathers
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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
- F16H57/02—Gearboxes; Mounting gearing therein
- F16H57/029—Gearboxes; Mounting gearing therein characterised by means for sealing the gearboxes, e.g. to improve airtightness
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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
- F16H57/0412—Cooling or heating; Control of temperature
- F16H57/0415—Air cooling or ventilation; Heat exchangers; Thermal insulations
- F16H57/0417—Heat exchangers adapted or integrated in the gearing
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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
- F16H57/042—Guidance of lubricant
- F16H57/0421—Guidance of lubricant on or within the casing, e.g. shields or baffles for collecting lubricant, tubes, pipes, grooves, channels or the like
Abstract
The invention discloses a transmission case shell with a pressure relief function, which comprises a case main body for mounting a transmission part, a pressure relief valve, an induced draft assembly, a heat dissipation assembly and an air duct, wherein the air duct is embedded in the bottom of the case main body and the side wall where an output shaft is positioned; the air inducing assembly comprises an air inducing fan, a transmission sealing assembly and a transmission assembly, wherein the transmission sealing assembly is arranged in the side wall of the shell main body, on which the output shaft is rotatably arranged, the air inducing fan is rotatably arranged in the air inlet, and the transmission assembly is rotatably arranged outside the side wall of the shell main body, on which the output shaft is arranged.
Description
Technical Field
The invention belongs to the technical field of vehicle parts, and particularly relates to a transmission case with a pressure relief function.
Background
The transmission case is a box-shaped part for supporting and containing various transmission mechanisms, and is widely applied due to the functions of sealing, dust prevention, heat insulation, sound insulation, lubricating oil storage, protection and the like, but the common transmission case has poor heat dissipation effect and can shorten the service life of parts inside the transmission case.
Lubricating oil is smeared on a transmission mechanism in the transmission box, after the transmission box is run-in for a long time, a large amount of heat can be generated, gas can be generated, the air pressure in the transmission box rises, the pressure difference inside and outside the transmission box is large, the internal temperature is too high, the service life and the service effect of the transmission mechanism can be influenced, the sealing pressure of a sealing device of the transmission box can be increased, the service life of the sealing device is shortened, and therefore the reduction of the temperature and the air pressure in the transmission box is very important.
Disclosure of Invention
The invention aims to provide a transmission case shell with a pressure relief function, an air inducing assembly is additionally arranged to suck air in the transmission case into a ventilation channel, so that the heat attachment of the air is quickly absorbed by a heat absorption bottom plate and is guided onto a radiating fin by a heat conduction column to dissipate heat, the heat dissipation speed is high, and the temperature balance of all parts in the transmission case is ensured.
In order to solve the technical problems, the invention adopts the technical scheme that:
the utility model provides a transmission housing with pressure release function, is including the shell main part that is used for installing drive disk assembly, relief valve, induced air subassembly, radiator unit and ventiduct, wherein:
the air duct is embedded in the bottom of the shell main body and the side wall where the output shaft is located, an air inlet of the air duct is located on the side face of the shell main body, and an air outlet of the air duct is located at the bottom of the shell main body;
the pressure release valve is arranged at the top of the shell main body;
the induced draft assembly comprises an induced draft fan, a transmission sealing assembly and a transmission assembly, the transmission sealing assembly is arranged in the side wall of the shell main body, on which the output shaft is rotatably arranged, the induced draft fan is rotatably arranged in the air inlet, the transmission assembly is rotatably arranged on the outer side of the side wall of the shell main body, on which the output shaft is arranged, the induced draft fan is in transmission connection with the transmission assembly through the transmission sealing assembly, and the transmission assembly is in transmission connection with the output shaft;
the heat dissipation assembly comprises a heat absorption bottom plate, a heat conduction column and a heat dissipation sheet, the heat absorption bottom plate is installed at the bottom of the ventilation channel, the heat conduction column penetrates through the side wall of the shell main body, and the heat dissipation sheet is fixedly installed outside the shell main body and fixedly connected with the heat conduction column.
Further, the transmission sealing assembly comprises a bearing, a front annular sealing cover, a rear annular sealing cover, a baffle shaft sleeve and a transmission shaft, wherein a mounting through hole is formed in the side wall of the shell main body, which is provided with the output shaft, the bearing is arranged in the middle of the mounting through hole, the transmission shaft is arranged in the bearing, two ends of the transmission shaft are respectively fixedly connected with the induced air fan and the transmission assembly, the front annular sealing cover is fixedly arranged at an opening of the mounting through hole, which is positioned in the shell main body, the rear annular sealing cover is fixedly arranged at the other opening of the mounting through hole, the diameter of an inner hole of the rear annular sealing cover is larger than the inner diameter of the bearing, the baffle shaft sleeve comprises the shaft sleeve and an annular baffle, the annular baffle is vertical to the side surface of the shaft sleeve and is fixedly connected to one end of the shaft sleeve, the other end of the shaft sleeve is arranged in the inner hole, an annular mounting groove is arranged on the side wall, the annular mounting groove is concentric with the mounting through hole, the diameter of the annular mounting groove is smaller than that of the annular baffle, a ventilation through hole is also arranged in the side wall, the vent hole penetrates through the side wall, the outlet is positioned at the bottom of the annular mounting groove, a curve is arranged at the position, close to the outlet, of the vent hole, the height of one end of the bend connected with the outlet of the ventilation through hole is lower than that of the other end, an oil filling hole is also arranged in the side wall provided with the output shaft, a rubber plug seal is arranged at the inlet of the oil filling hole, the outlet of the oil filling hole is communicated with the middle part of the bend, an annular groove is arranged on the annular baffle plate at the position matched with the annular mounting groove, the cross section of the annular groove is T-shaped, an annular sliding block with a T-shaped cross section is arranged in the annular groove in a sliding mode, a spring is fixed at the bottom of the annular groove and pushes the annular sliding block to slide towards the outer side, and the end face of the annular sliding block is in close contact with the bottom of the annular groove.
Furthermore, the air outlet of the air duct is also provided with a sealing cover, the sealing cover comprises a coaming and an upper cover, the coaming is fixedly installed on the air outlet, the upper cover is fixedly installed on the coaming, and a downward-inclined opening is formed in the joint of the upper end of the coaming and the upper cover.
Further, the heat conducting column comprises a pipe sleeve, a heat conducting rod and a high-temperature-resistant filler, the heat conducting rod is made of a heat conducting material mixed with carbon nano tubes, the heat conducting rod is vertically installed in the pipe sleeve, two ends of the heat conducting rod are fixedly connected with the heat absorbing bottom plate and the radiating fins respectively, and the high-temperature-resistant filler is filled in the pipe sleeve.
The invention has the beneficial effects that:
1. the pressure relief valve and the heat dissipation assembly are arranged, the heat dissipation assembly can guide the temperature in the transmission box to dissipate heat of air of the transmission box, the pressure relief valve sends out partial high-pressure air when the air pressure in the transmission box is too high, the structure is simple, and the service life and the service quality of the transmission mechanism are greatly improved.
2. The radiator unit has included the heat absorption bottom plate, heat conduction post and fin, most heat in the air can be absorbed to the heat absorption bottom plate, the heat conduction post can be quick leads out the shell main part with the heat on the heat absorption bottom plate, and dispel the heat to the outside by the fin, the induced air subassembly can attract the air in the shell main part to enter into the ventiduct, discharge by the air outlet of ventiduct again, form air cycle, the heat in the air that enters into in the ventiduct can be absorbed by the heat absorption bottom plate, the process greatly increased radiating rate that the air constantly flows, the radiating effect is improved, simultaneously also the air temperature with in the transmission case is more balanced, avoid local overheated problem.
3. Sealing performance is better, can be applicable to the condition that transmission case internal gas pressure constantly increased completely, and the high-pressure gas of shell main part can promote to be located the bend in lubricating oil and slide to the export, because annular slider and annular mounting groove bottom sliding connection, lubricating oil can be sealed by annular slider, when reaching sealed through-hole purpose, because the existence of lubricating oil can improve the smooth degree when baffle axle sleeve rotates greatly.
In summary, the invention has simple structure, can discharge high-pressure gas in the transmission case, avoids overhigh air pressure in the transmission case, can radiate heat in the shell main body by the radiating component, greatly reduces the temperature in the shell main body, and improves the service life and the service quality of the transmission mechanism.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
FIG. 1 is a cross-sectional view of the present invention;
FIG. 2 is a top view of the present invention.
FIG. 3 is a cross-sectional view of the drive seal assembly of the present invention.
Fig. 4 is a cross-sectional view of a baffle bushing of the present invention.
Fig. 5 is a bottom view of the baffle bushing of the present invention.
FIG. 6 is an enlarged partial view of the drive seal assembly of the present invention.
Fig. 7 is a cross-sectional view of a heat conductive post of the present invention.
Fig. 8 is a cross-sectional view of the closure of the present invention.
Wherein: the heat-insulating shell comprises a shell main body-1, an air inducing assembly-3, a heat dissipation assembly-4, an air duct-5, an output shaft-6, an air inlet-7, an air outlet-8, a pressure release valve-9, an air inducing fan-10, a transmission sealing assembly-11, a transmission assembly-12, a heat absorption bottom plate-13, a heat conduction column-14, a heat radiating fin-15, a pipe sleeve-16, a heat conduction rod-17, high-temperature resistant filler-18, a sealing cover-19, a coaming-20, an upper cover-21, a notch-22, a bearing-23, a front annular sealing cover-24, a rear annular sealing cover-25, a baffle shaft sleeve-26, a transmission shaft-28, an installation through hole-29, a shaft sleeve-30, an annular baffle-31, an annular installation groove-32, a, Bend-34, oil filling hole-35, rubber plug seal-36, ring groove-37, ring slide block-38, spring-39.
Detailed Description
The embodiments of the invention will be described in detail below with reference to the drawings, but the invention can be implemented in many different ways as defined and covered by the claims.
Please refer to the attached drawings, a transmission case with pressure relief function includes a case main body 1 for mounting transmission parts, a pressure relief valve 9, an induced air assembly 3, a heat dissipation assembly 4 and an air duct 5, wherein:
The relief valve 9 is installed on the top of the casing main body 1, and the threshold value of the relief valve 9 is set as required.
The induced air assembly 3 comprises an induced air fan 10, a transmission sealing assembly 11 and a transmission assembly 12, the transmission sealing assembly 11 is installed in the side wall of the shell body 1 where the output shaft 6 is rotatably installed, the induced air fan 10 is rotatably installed in the air inlet 7, the transmission assembly 12 is rotatably installed on the outer side of the side wall of the shell body 1 where the output shaft 6 is installed, the induced air fan 10 is in transmission connection with the transmission assembly 12 through the transmission sealing assembly 11, and the transmission assembly 12 is in transmission connection with the output shaft 6.
The heat dissipation assembly 4 comprises a heat absorption bottom plate 13, a heat conduction column 14 and a heat dissipation sheet 15, the heat absorption bottom plate 13 is installed at the bottom of the ventilation channel 5, the heat conduction column 14 penetrates through the side wall of the shell main body 1, the heat dissipation sheet 15 is fixedly installed outside the shell main body 1 and fixedly connected with the heat conduction column 14, the heat conduction column 14 comprises a pipe sleeve 16, a heat conduction rod 17 and a high-temperature-resistant filler 18, the heat conduction rod 17 is made of a heat conduction material mixed with carbon nano tubes, the heat conduction rod 17 is vertically installed in the pipe sleeve 16, two ends of the heat conduction rod are fixedly connected with the heat absorption bottom plate 13 and the heat dissipation sheet.
The transmission sealing assembly 11 comprises a bearing 23, a front annular sealing cover 24, a rear annular sealing cover 25, a baffle shaft sleeve 26 and a transmission shaft 28, a mounting through hole 29 is arranged in the side wall of the shell main body 1 provided with the output shaft 6, the bearing 23 is arranged in the middle of the mounting through hole 29, the transmission shaft 28 is arranged in the bearing 23, two ends of the transmission shaft 28 are fixedly connected with the induced draft fan 10 and the transmission assembly 12 respectively, the front annular sealing cover 24 is fixedly arranged at the opening of the mounting through hole 29 in the shell main body 1, the rear annular sealing cover 25 is fixedly arranged at the other opening of the mounting through hole 29, the diameter of an inner hole of the rear annular sealing cover 25 is larger than the inner diameter of the bearing 23, the baffle shaft sleeve 26 comprises a shaft sleeve 30 and an annular baffle 31, the annular baffle 31 is perpendicular to the side surface of the shaft sleeve 30 and is fixedly connected with one end of the shaft sleeve 30, the side of the shaft sleeve 30 is slidably connected with the inner hole of the rear annular seal cover 25, the annular baffle 31 is slidably connected with the outer side of the side wall of the shell body 1 provided with the output shaft 6, an annular mounting groove 32 is arranged on the side wall, the annular mounting groove 32 is concentric with the mounting through hole 29, the diameter of the annular baffle is smaller than that of the annular baffle 31, a ventilation through hole 33 is also arranged in the side wall, the ventilation through hole 33 penetrates through the side wall, the outlet of the ventilation through hole is positioned at the bottom of the annular mounting groove 32, a bent channel 34 is arranged at the position, close to the outlet, of the ventilation through hole 33, the height of one end, connected with the outlet of the ventilation through hole 33, of the bent channel 34 is lower than that of the other end, an oil filling hole 35 is also arranged in the side wall provided with the output shaft 6, a rubber plug seal 36 is arranged, the cross section of the annular groove 37 is T-shaped, an annular sliding block 38 with the T-shaped cross section is slidably mounted in the annular groove 37, a spring 39 is fixed at the bottom of the annular groove 37, the spring 39 pushes the annular sliding block 38 to slide outwards, and the end face of the annular sliding block 38 is tightly contacted with the bottom of the annular groove 37.
The working principle is as follows:
the threshold value of the pressure relief valve 9 can be set as desired, i.e. the air pressure in the transmission box can be defined as desired.
The power of the induced air component 3 comes from the output shaft 6 of the transmission mechanism, the generated attraction attracts the air in the transmission box into the ventilation channel 5, the heat absorption bottom plate 13 absorbs heat, the heat conduction column 14 contains carbon nano tubes, the heat conduction performance is excellent, and the heat radiating fins 15 can radiate the heat quickly.
Ventilation hole 33 and shell main part 1 intercommunication, the installation of the 11 installation technical scheme of transmission seal assembly, baffle shaft sleeve 26 links firmly with transmission shaft 28, shaft sleeve 30 and 25 hole sliding connection of back annular closing cap can reach certain sealed effect, and annular baffle 31 and shell main part 1 lateral wall lateral surface sliding contact can reach certain sealed effect, but can't guarantee the sealed effect of the pressure increase's in the transmission case condition. Annular slider 38 that sets up slides in ring channel 37, and promote to the outside by spring 39, the terminal surface of nature annular slider 38 is deepened in annular mounting groove 32, and with the bottom sliding connection of annular mounting groove 32, sealing effect has been improved greatly, lubricating oil can flow to the outside under the high-pressure gas in shell main part 1 in lieing in bend 34, lubricating oil and the contact of annular slider 38 terminal surface, annular slider 38 holding position unchangeable can be guaranteed to the elasticity that spring 39 provided, high-pressure gas can make lubricating oil fully with the contact of annular slider 38 terminal surface, under baffle axle sleeve 26's rotation, annular mounting groove 32 bottom can be covered with to lubricating oil, and annular slider 38 terminal surface and the contact of annular mounting groove 32 bottom sliding, because lubricating oil and the abundant contact of annular slider 38 terminal surface, sealing effect has been guaranteed.
The above-described embodiments of the present invention should not be construed as limiting the scope of the present invention, and any modifications, equivalents, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.
Claims (3)
1. The utility model provides a transmission housing with pressure release function, includes the shell main part that is used for installing drive disk assembly, its characterized in that: relief valve, induced air subassembly, radiator unit and ventiduct, wherein:
the air duct is embedded in the bottom of the shell main body and the side wall where the output shaft is located, an air inlet of the air duct is located on the side face of the shell main body, and an air outlet of the air duct is located at the bottom of the shell main body;
the pressure release valve is arranged at the top of the shell main body;
the induced draft assembly comprises an induced draft fan, a transmission sealing assembly and a transmission assembly, the transmission sealing assembly is arranged in the side wall of the shell main body, on which the output shaft is rotatably arranged, the induced draft fan is rotatably arranged in the air inlet, the transmission assembly is rotatably arranged on the outer side of the side wall of the shell main body, on which the output shaft is arranged, the induced draft fan is in transmission connection with the transmission assembly through the transmission sealing assembly, and the transmission assembly is in transmission connection with the output shaft;
the heat radiation component comprises a heat absorption bottom plate, a heat conduction column and a heat radiation fin, the heat absorption bottom plate is arranged at the bottom of the ventilation channel, the heat conduction column penetrates through the side wall of the shell main body, the heat radiation fin is fixedly arranged outside the shell main body and is fixedly connected with the heat conduction column, the transmission sealing component comprises a bearing, a front annular sealing cover, a rear annular sealing cover, a baffle shaft sleeve and a transmission shaft, an installation through hole is arranged in the side wall of the shell main body, which is provided with an output shaft, the bearing is arranged in the middle of the installation through hole, the transmission shaft is arranged in the bearing, two ends of the transmission shaft are respectively and fixedly connected with the induced draft fan and the transmission component, the front annular sealing cover is fixedly arranged at an opening of the installation through hole in the shell main body, the rear annular sealing cover is fixedly arranged at the other opening of the installation, the other end of the shaft sleeve is arranged in an inner hole of the rear annular seal cover, the end face of the shaft sleeve is in sliding connection with the end face of the bearing, the side face of the shaft sleeve is in sliding connection with the inner hole of the rear annular seal cover, the annular baffle is in sliding connection with the outer side face of the side wall of the shell main body, which is provided with the annular mounting groove, the annular mounting groove is concentric with the mounting through hole, the diameter of the annular baffle is smaller than that of the annular baffle, the side wall of the rear annular seal cover is also provided with a ventilation through hole, the ventilation through hole penetrates through the side wall, the outlet of the ventilation through hole is positioned at the bottom of the annular mounting groove, the position of the ventilation through hole, which is close to the outlet, is provided with a bent channel, one end of the bent channel, which is connected with the outlet of the ventilation through hole, is lower, the cross section of ring channel is the T type, and slidable mounting has the cross section to be the annular slider of T type in the ring channel, is fixed with the spring bottom the ring channel, and the spring promotes annular slider and outwards slides, and the bottom in close contact with of annular slider terminal surface and ring channel.
2. The transmission case with the pressure relief function according to claim 1, wherein: the air outlet of the air duct is also provided with a sealing cover, the sealing cover comprises a coaming and an upper cover, the coaming is fixedly arranged on the air outlet, the upper cover is fixedly arranged on the coaming, and a downward-inclined opening is arranged at the joint of the upper end of the coaming and the upper cover.
3. The transmission case with the pressure relief function according to claim 1, wherein: the heat conducting column comprises a pipe sleeve, a heat conducting rod and a high-temperature-resistant filler, wherein the heat conducting rod is made of a heat conducting material mixed with carbon nano tubes, the heat conducting rod is vertically arranged in the pipe sleeve, two ends of the heat conducting rod are fixedly connected with the heat absorbing bottom plate and the radiating fins respectively, and the high-temperature-resistant filler is filled in the pipe sleeve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810705258.XA CN108612835B (en) | 2018-07-02 | 2018-07-02 | Transmission case shell with pressure relief function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810705258.XA CN108612835B (en) | 2018-07-02 | 2018-07-02 | Transmission case shell with pressure relief function |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108612835A CN108612835A (en) | 2018-10-02 |
| CN108612835B true CN108612835B (en) | 2020-12-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810705258.XA Active CN108612835B (en) | 2018-07-02 | 2018-07-02 | Transmission case shell with pressure relief function |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110274010A (en) * | 2019-08-14 | 2019-09-24 | 郑云龙 | A kind of car deceleration device with heat sinking function |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| DE102009014595A1 (en) * | 2009-03-24 | 2010-09-30 | Magna Powertrain Ag & Co Kg | gear unit |
| CN201925455U (en) * | 2010-12-07 | 2011-08-10 | 张建定 | Gear box with cooling mechanism |
| DE102012213585A1 (en) * | 2012-08-01 | 2014-02-06 | Sauer-Danfoss Gmbh & Co. Ohg | CONTROL DEVICE FOR HYDROSTATIC DRIVES |
| CN105387191A (en) * | 2015-11-29 | 2016-03-09 | 綦江永跃齿轮有限公司 | Speed reducer with air cooling and buffer structure |
| CN207539322U (en) * | 2017-11-15 | 2018-06-26 | 庞林文 | A kind of three axis deceleration box |
| CN108105335A (en) * | 2018-01-05 | 2018-06-01 | 哈尔滨理工大学 | A kind of high efficiency and heat radiation gear reduction unit |
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Effective date of registration: 20201120 Address after: Tunxi road in Baohe District of Hefei city of Anhui Province, No. 193 230000 Applicant after: Hefei University of Technology Address before: 230601 No. 123, Ziyun Road, Hefei economic and Technological Development Zone, Anhui, China Applicant before: ANHUI SIYUAN SANQING INTELLIGENT MANUFACTURING Co.,Ltd. |
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