CN113915323A - Lubricating oil pipe and transmission case - Google Patents
Lubricating oil pipe and transmission case Download PDFInfo
- Publication number
- CN113915323A CN113915323A CN202111139590.2A CN202111139590A CN113915323A CN 113915323 A CN113915323 A CN 113915323A CN 202111139590 A CN202111139590 A CN 202111139590A CN 113915323 A CN113915323 A CN 113915323A
- Authority
- CN
- China
- Prior art keywords
- lubricating oil
- oil
- inclined plane
- lubricating
- pipe
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000010687 lubricating oil Substances 0.000 title claims abstract description 80
- 230000005540 biological transmission Effects 0.000 title claims description 32
- 239000003921 oil Substances 0.000 claims abstract description 71
- 238000002347 injection Methods 0.000 claims abstract description 26
- 239000007924 injection Substances 0.000 claims abstract description 26
- 230000001050 lubricating effect Effects 0.000 claims abstract description 12
- 239000007921 spray Substances 0.000 claims description 13
- 230000002708 enhancing effect Effects 0.000 abstract 1
- 238000005461 lubrication Methods 0.000 description 15
- 239000000725 suspension Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Images
Classifications
-
- 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
- F16H57/0423—Lubricant guiding means mounted or supported on the casing, e.g. shields or baffles for collecting lubricant, tubes or pipes
-
- 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
- F16H57/0456—Lubrication by injection; Injection nozzles or tubes therefor
-
- 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
- F16H57/0467—Elements of gearings to be lubricated, cooled or heated
- F16H57/0469—Bearings or seals
- F16H57/0471—Bearing
Abstract
The invention provides a lubricating oil pipe which comprises a pipe wall part, an oil injection hole and an oil outlet groove. The pipe wall part is surrounded to form a cavity part for circulating lubricating oil; the oil injection holes are arranged on the wall part of the lubricating oil pipe at intervals along the axial direction of the lubricating oil pipe, and lubricating oil flows out of the oil injection holes; the oil outlet groove is arranged around the oil injection hole and comprises a first inclined plane and a second inclined plane which are obliquely arranged and intersected, and lubricating oil is diffused out through the first inclined plane and the second inclined plane after flowing out of the oil injection hole so as to realize a lubricating effect. The lubricating oil hole provided by the invention can improve the lubricating area of lubricating oil, thereby enhancing the lubricating effect on gears and bearings in the gearbox.
Description
Technical Field
The invention relates to the technical field of transmission cases, and particularly provides a transmission case with a lubricating oil pipe.
Background
The transmission case generally contains a large amount of friction pairs such as gears and bearings, and the friction pairs such as the gears and the bearings generate a large amount of heat in the operation process, and a lubricating system is generally required to be designed. The lubricating system provides lubrication for the gear and the bearing on one hand and takes away heat generated in the running process of the gear and the bearing on the other hand. A lubricating oil pipe with a plurality of circular oil injection holes is usually adopted in the existing gearbox to provide lubrication for the transmission case, and lubricating oil is injected to a position needing lubrication through the oil injection holes. When the lubricating oil pipe is adopted to provide lubrication for the transmission case, the structure of the oil spray hole has great influence on the lubrication effect, however, the range of the injection of the circular oil spray hole applied in the prior art is limited, and the lubrication effect in the transmission case is not ideal. Therefore, it is necessary to provide a lubricating oil pipe with a new structure of oil injection holes to overcome the above technical problems.
Disclosure of Invention
The invention aims to provide a transmission case with a lubricating oil pipe, wherein an oil groove is designed at an oil injection hole by optimizing the structure of the oil injection hole so as to improve the lubricating area of lubricating oil, and further enhance the lubricating effect on gears and bearings in the transmission case.
The invention provides a lubricating oil pipe which comprises a pipe wall part, an oil injection hole and an oil outlet groove. The pipe wall part is surrounded to form a cavity part for circulating lubricating oil; the oil injection holes are arranged on the wall part of the lubricating oil pipe at intervals along the axial direction of the lubricating oil pipe, and lubricating oil flows out of the oil injection holes; the oil outlet groove is arranged around the oil injection hole and comprises a first inclined plane and a second inclined plane which are obliquely arranged and intersected, and lubricating oil is diffused out through the first inclined plane and the second inclined plane after flowing out of the oil injection hole so as to realize a lubricating effect.
Further, the lubricating oil pipe comprises an intersection line formed by the intersection of the first inclined surface and the second inclined surface, and the intersection line is vertically arranged with the axis of the lubricating oil pipe.
Furthermore, the first inclined plane and the second inclined plane are both planes and are symmetrical by taking the intersecting line as a central line.
Furthermore, the first inclined surface and the second inclined surface are both arc surfaces, the first inclined surface and the second inclined surface are symmetrical by taking the intersecting line as a center line, and the first inclined surface and the second inclined surface extend along a direction far away from the intersecting line.
Further, an included angle of 90 degrees is formed between the first inclined surface and the second inclined surface; an included angle of 90 degrees is formed between the tangent plane of the first inclined plane and the tangent plane of the second inclined plane.
Further, the maximum opening formed by the first inclined surface and the second inclined surface is longer than or equal to the diameter of the oil spray hole in the axial direction.
Further, the oil spray holes are arranged in a single row, the oil spray holes are arranged in the axial direction of the lubricating oil pipe in a non-equidistant mode, and the axes of the oil spray holes are in the same plane.
Further, the invention also provides a transmission case which comprises the lubricating oil pipe.
The transmission case with the lubricating oil pipe provided by the invention can bring at least one of the following beneficial effects:
the lubricating oil pipe that provides in this scheme through the structure of optimizing the nozzle opening, designs the lubricated area of oil groove in order to improve lubricating oil in nozzle opening department, and then has strengthened the lubricated effect to the inside gear of gearbox and bearing.
Drawings
The invention is described in further detail below with reference to the following figures and detailed description:
FIG. 1 is a front elevational view of a transmission housing of the present invention;
FIG. 2 is a front elevational view of the transmission housing with the cover removed in accordance with the present invention;
FIG. 3 is a rear elevational view of the transmission housing of the present invention;
FIG. 4 is a cross-sectional view taken along plane A-A of FIG. 3;
FIG. 5 is an enlarged view of a portion of FIG. 4 at C;
fig. 6 is a front view of the lubricating oil tube of the present invention;
fig. 7 is a right side view of the lubricating oil tube of the present invention;
fig. 8 is a schematic structural view of a lubricating oil tube of the present invention;
FIG. 9 is a cross-sectional view taken along line B-B of FIG. 6;
FIG. 10 is an enlarged view of a portion of FIG. 6 at D;
FIG. 11 is an enlarged view of a portion of FIG. 7 at E;
FIG. 12 is an enlarged view of a portion of FIG. 8 at F;
fig. 13 is a partial enlarged view of fig. 9 at G.
The reference numbers illustrate:
1-a transmission housing;
2-shaft hole, 21-first shaft hole, 22-second shaft hole, 23-third shaft hole, 24-fourth shaft hole, 25-fifth shaft hole and 26-sixth shaft hole;
3-annular oil duct, 31-lubricating oil hole, 311-first lubricating oil hole, 312-second lubricating oil hole, 313-third lubricating oil hole, 314-fourth lubricating oil hole, 315-fifth lubricating oil hole, 32-oil collecting tank and 33-cover plate;
4-oil supply line;
5-lubrication branch, 51-first lubrication branch, 52-second lubrication branch;
6-pipe hole;
7-lubricating oil pipe, 71-pipe wall part, 72-cavity part, 73-oil spray hole, 74-oil outlet groove, 741-first inclined plane, 742-second inclined plane and 743-intersecting line.
Detailed Description
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
For the sake of simplicity, the drawings only schematically show the parts relevant to the present invention, and they do not represent the actual structure as a product. In addition, in order to make the drawings concise and understandable, components having the same structure or function in some of the drawings are only schematically illustrated or only labeled. In this document, "one" means not only "only one" but also a case of "more than one".
It should be further understood that the term "and/or" as used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.
In this context, it is to be understood that, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In addition, in the description of the present application, the terms "first", "second", and the like are used only for distinguishing the description, and are not intended to indicate or imply relative importance.
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following description will be made with reference to the accompanying drawings. It is obvious that the drawings in the following description are only some examples of the invention, and that for a person skilled in the art, other drawings and embodiments can be derived from them without inventive effort.
Embodiments of the present invention are described in further detail below with reference to the accompanying drawings of the specification.
The fore and aft relationships described herein are all with reference to the direction of tractor movement, and the high horsepower wheeled tractor comprises: the device comprises a power system assembly, a walking system assembly, a transmission system assembly, a covering part assembly, a steering system assembly, a hydraulic system assembly, a rear working device and a front suspension device. The front suspension device, the power system assembly, the transmission system assembly and the rear working device are sequentially connected from front to back according to the advancing direction of the tractor, and are connected with the walking system assembly through the front axle of the transmission system assembly and the left and right ends of the rear axle to form an assembly chassis assembly of the tractor; the steering system assembly and the hydraulic system assembly are sequentially arranged on the right side of the assembly chassis assembly of the tractor from front to back; the covering part assembly is arranged above the chassis assembly of the whole tractor. The power system assembly is used as a power source for the tractor to work and provides power for the whole tractor; the transmission system assembly transmits power from the power system assembly to the tractor walking system assembly, the steering system assembly and the hydraulic system assembly respectively; the walking system assembly drives the tractor to run, the steering system assembly drives the tractor to turn, the hydraulic system assembly converts mechanical energy transmitted by the transmission system assembly into hydraulic energy and controls the rear working device and the front suspension device to lift and descend when the farm tool is hung; the covering part assembly provides a protection function for the power system assembly and provides safety protection and rain and sun shielding functions for a tractor driver; the structure of the power system assembly, the traveling system assembly, the covering part assembly, the steering system assembly, the hydraulic system assembly, the rear working device and the front suspension device is mature technology in the field, so that the detailed description of pictures and characters is omitted, and only the transmission case related to the invention is described in detail.
Referring to fig. 1, a transmission case is provided in one embodiment, which includes: the device comprises a transmission case shell 1, a shaft hole 2, an annular oil duct 3, an oil supply pipeline 4 and a lubricating branch 5; the shaft hole 2 is arranged on the transmission case shell 1 and used for bearing a transmission shaft; the annular oil duct 3 is arranged on the transmission case shell 1, lubricating oil is filled in the annular oil duct 3, and a plurality of lubricating oil holes 31 are formed in the annular oil duct 3; an oil supply line 4, the oil supply line 4 being in communication with the annular oil duct 3; an oil collecting groove 32 is formed in the annular oil passage 3, one end of the lubricating branch 5 is communicated with the other end of the oil collecting groove 32 and the shaft hole 2, and the annular oil passage 3 further comprises a cover plate 33 which is arranged on one side opposite to the lubricating oil hole 31 and used for sealing the annular oil passage 3. Referring to fig. 4 and 5, in the present embodiment, the lubrication branch 5 includes a first lubrication branch 51 and a second lubrication branch 52; the shaft hole 2 includes a first shaft hole 21 communicating with the first lubrication branch 51 and a second shaft hole 22 communicating with the second lubrication branch 52; the annular oil passage 3 is disposed around the first shaft hole 21, and the second shaft hole 22 is disposed outside the annular oil passage 3.
Referring to fig. 2 and 3, the lubricating oil hole 31 includes a first lubricating oil hole 311, a second lubricating oil hole 312, a third lubricating oil hole 313 and a fourth lubricating oil hole 314, the transmission case 1 further includes a third shaft hole 23 communicated with the first lubricating oil hole 311, a fourth shaft hole 24 communicated with the second lubricating oil hole 312, a fifth shaft hole 25 communicated with the third lubricating oil hole 313 and a sixth shaft hole 26 communicated with the fourth lubricating oil hole 314, and bearings are arranged in the third shaft hole 23, the fourth shaft hole 24, the fifth shaft hole 25 and the sixth shaft hole 26, so that the installation of the shaft is facilitated.
The second shaft hole 22 with third shaft hole 23, fourth shaft hole 24, fifth shaft hole 25, sixth shaft hole 26 are the pentagon setting, first shaft hole 21 sets up inside the pentagon that second shaft hole 22, third shaft hole 23, fourth shaft hole 24, fifth shaft hole 25, sixth shaft hole 26 formed.
The lubricating oil hole 31 further comprises a fifth lubricating oil hole 315, and the transmission case 1 further comprises a pipe hole 6 communicated with the fifth lubricating oil hole 315; further, one end of the pipe hole 6 is connected with a fifth lubricating oil hole 315, and the other end is connected with a lubricating oil pipe 7; through setting up annular oil duct 3, effectively reduce the connection of the lubricated oil pipe of conventional structure, and then reduced the situation of junction oil leak, effectively reduced the quantity of spare part simultaneously, improved the stability of transmission case.
Referring to fig. 6 to 13, the lubricating oil pipe 7 includes a pipe wall portion 71, an oil injection hole 73, and an oil outlet groove 74, and the pipe wall portion 71 surrounds a cavity portion 72 formed to circulate lubricating oil; the oil injection holes 73 are arranged on the pipe wall portion 71 at intervals along the axial direction of the lubricating oil pipe 7, and lubricating oil flows out from the oil injection holes 73; the oil outlet groove 74 is disposed around the oil injection hole 73, and includes two first inclined planes 741 and two second inclined planes 742 that are obliquely disposed and intersect with each other, and the lubricating oil is discharged from the oil injection hole 73 through the first inclined planes 741 and the second inclined planes 742 to achieve a lubricating effect. In this embodiment, the first inclined surface 741 and the second inclined surface 742 are both planar, and the first inclined surface 741 and the second inclined surface 742 are symmetric about the intersection line 743 as a central line; the first inclined surface 741 and the second inclined surface 742 form an included angle of 90 degrees; an included angle of 90 ° is formed between the tangent plane of the first inclined plane 741 and the tangent plane of the second inclined plane 742.
The first inclined surface 741 and the second inclined surface 742 form a maximum opening, and the length of the maximum opening in the axial direction is greater than or equal to the diameter of the oil jet hole 73. Further, the oil injection holes 73 are arranged in a single row, the oil injection holes 73 are arranged in the axial direction of the lubricating oil pipe 7 in a non-equidistant manner, and the axes of the oil injection holes 73 are in the same plane.
The overall structure of the transmission case and the lubrication oil pipe in the second embodiment is substantially the same as that in the first embodiment, except that the first inclined surface 741 and the second inclined surface 742 are both arc surfaces, the first inclined surface 741 and the second inclined surface 742 are symmetrical about the intersection line 743, and the first inclined surface 741 and the second inclined surface 742 extend in a direction away from the intersection line 743.
It should be noted that various modifications and variations can be made to the above-described exemplary embodiments of the present invention without departing from the spirit and scope of the invention, as will be apparent to those skilled in the art. Thus, it is intended that the present invention cover the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.
Claims (9)
1. A lubricating oil tube, characterized by comprising:
a pipe wall portion, wherein a cavity portion for circulating lubricating oil is formed around the pipe wall portion;
the oil spray holes are arranged on the wall part of the lubricating oil pipe at intervals along the axial direction of the lubricating oil pipe, and lubricating oil flows out of the oil spray holes;
and the oil outlet groove is arranged around the oil injection hole and comprises a first inclined plane and a second inclined plane which are obliquely arranged and intersected, and lubricating oil flows out of the oil injection hole and then is diffused by the first inclined plane and the second inclined plane to realize a lubricating effect.
2. The lubricating oil tube of claim 1, wherein:
the lubricating oil pipe comprises an intersection line formed by the intersection of the first inclined plane and the second inclined plane, and the intersection line and the axis of the lubricating oil pipe are vertically arranged.
3. The lubricating oil tube of claim 2, wherein:
the first inclined plane and the second inclined plane are both planes and are symmetrical by taking the intersection line as a central line.
4. The lubricating oil tube of claim 2, wherein:
the first inclined surface and the second inclined surface are both arc surfaces and are symmetrical by taking the intersection line as a central line, and the first inclined surface and the second inclined surface extend along the direction far away from the intersection line.
5. The lubricating oil tube of claim 3, wherein:
an included angle of 90 degrees is formed between the first inclined plane and the second inclined plane.
6. The lubricating oil tube of claim 4, wherein:
an included angle of 90 degrees is formed between the tangent plane of the first inclined plane and the tangent plane of the second inclined plane.
7. The lubricating oil tube of claim 2, wherein:
the maximum opening formed by the first inclined surface and the second inclined surface is longer than or equal to the diameter of the oil spray hole in the axial direction.
8. The lubricating oil tube of claim 1, wherein:
the oil spray holes are arranged in a single row, the oil spray holes are arranged in the axial direction of the lubricating oil pipe in a non-equidistant mode, and the axes of the oil spray holes are in the same plane.
9. A transmission case characterized by comprising the lubricating oil tube as recited in any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111139590.2A CN113915323A (en) | 2021-09-28 | 2021-09-28 | Lubricating oil pipe and transmission case |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111139590.2A CN113915323A (en) | 2021-09-28 | 2021-09-28 | Lubricating oil pipe and transmission case |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113915323A true CN113915323A (en) | 2022-01-11 |
Family
ID=79236543
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111139590.2A Pending CN113915323A (en) | 2021-09-28 | 2021-09-28 | Lubricating oil pipe and transmission case |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113915323A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5341900A (en) * | 1991-11-26 | 1994-08-30 | Mobil Oil Corporation | Open gear set lubrication system |
| DE102012109133A1 (en) * | 2012-09-27 | 2014-03-27 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Lubrication device for gear sets in gear box of motor vehicle, has coupling element connected with inner pipe under radial penetration of oil dispenser, and oil injector nozzles released by oil discharging nozzles and attached to gear sets |
| CN204878668U (en) * | 2015-07-08 | 2015-12-16 | 南京金城机械有限公司 | Novel it is lubricated directly to spout formula drive gear device |
| CN108844094A (en) * | 2018-03-16 | 2018-11-20 | 南京航空航天大学 | A kind of after-burner using flat fan spray nozzle fuel feeding |
| CN208330985U (en) * | 2018-03-30 | 2019-01-04 | 南宁钛银科技有限公司 | A kind of heavy-duty bearing lubricant oil road structure |
| CN113048228A (en) * | 2021-05-07 | 2021-06-29 | 浙江钱江摩托股份有限公司 | Lubricating structure for speed changing shaft of motorcycle engine |
-
2021
- 2021-09-28 CN CN202111139590.2A patent/CN113915323A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5341900A (en) * | 1991-11-26 | 1994-08-30 | Mobil Oil Corporation | Open gear set lubrication system |
| DE102012109133A1 (en) * | 2012-09-27 | 2014-03-27 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Lubrication device for gear sets in gear box of motor vehicle, has coupling element connected with inner pipe under radial penetration of oil dispenser, and oil injector nozzles released by oil discharging nozzles and attached to gear sets |
| CN204878668U (en) * | 2015-07-08 | 2015-12-16 | 南京金城机械有限公司 | Novel it is lubricated directly to spout formula drive gear device |
| CN108844094A (en) * | 2018-03-16 | 2018-11-20 | 南京航空航天大学 | A kind of after-burner using flat fan spray nozzle fuel feeding |
| CN208330985U (en) * | 2018-03-30 | 2019-01-04 | 南宁钛银科技有限公司 | A kind of heavy-duty bearing lubricant oil road structure |
| CN113048228A (en) * | 2021-05-07 | 2021-06-29 | 浙江钱江摩托股份有限公司 | Lubricating structure for speed changing shaft of motorcycle engine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20220328 Address after: No. 555, Wujin East Avenue, Wujin District, Changzhou City, Jiangsu Province 213176 Applicant after: JIANGSU CHANGFA AGRICULTURAL EQUIPMENT Co.,Ltd. Applicant after: Changzhou Huachuang Aviation Technology Co.,Ltd. Address before: 539-1 Xiacheng South Road, Wujin District, Changzhou City, Jiangsu Province 213100 Applicant before: Changzhou Huachuang Aviation Technology Co.,Ltd. |
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| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20230403 Address after: No. 555, Wujin East Avenue, Wujin District, Changzhou City, Jiangsu Province 213176 Applicant after: JIANGSU CHANGFA AGRICULTURAL EQUIPMENT Co.,Ltd. Address before: No. 555, Wujin East Avenue, Wujin District, Changzhou City, Jiangsu Province 213176 Applicant before: JIANGSU CHANGFA AGRICULTURAL EQUIPMENT Co.,Ltd. Applicant before: Changzhou Huachuang Aviation Technology Co.,Ltd. |
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| TA01 | Transfer of patent application right | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20220111 |
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| WD01 | Invention patent application deemed withdrawn after publication |