CN116750089A - Auxiliary frame and engineering machinery - Google Patents
Auxiliary frame and engineering machinery Download PDFInfo
- Publication number
- CN116750089A CN116750089A CN202310790239.2A CN202310790239A CN116750089A CN 116750089 A CN116750089 A CN 116750089A CN 202310790239 A CN202310790239 A CN 202310790239A CN 116750089 A CN116750089 A CN 116750089A
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- China
- Prior art keywords
- bottom beam
- auxiliary frame
- plates
- subframe
- welded
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- 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.)
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- 238000005192 partition Methods 0.000 claims description 13
- 238000007789 sealing Methods 0.000 claims description 12
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 238000010276 construction Methods 0.000 claims 1
- 238000009434 installation Methods 0.000 description 12
- 238000003466 welding Methods 0.000 description 7
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000002452 interceptive effect Effects 0.000 description 2
- 210000001503 joint Anatomy 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D21/00—Understructures, i.e. chassis frame on which a vehicle body may be mounted
- B62D21/18—Understructures, i.e. chassis frame on which a vehicle body may be mounted characterised by the vehicle type and not provided for in groups B62D21/02 - B62D21/17
- B62D21/186—Understructures, i.e. chassis frame on which a vehicle body may be mounted characterised by the vehicle type and not provided for in groups B62D21/02 - B62D21/17 for building site vehicles or multi-purpose tractors
Abstract
The application belongs to the technical field of universal chassis cranes, and particularly relates to an auxiliary frame and engineering machinery. The auxiliary frame comprises an auxiliary frame main body and an auxiliary frame bottom beam; the auxiliary frame bottom beam is connected with a chassis girder of the engineering machinery positioned below; the shape of the upper part of the auxiliary frame bottom beam is matched with the shape of the lower end face of the auxiliary frame main body, the auxiliary frame bottom beam is connected with the auxiliary frame main body positioned above, and the width of the auxiliary frame bottom beam is smaller than that of the auxiliary frame main body. The application solves the problems of difficult overall space arrangement, limited section width of the auxiliary frame main body and limited flatness of the bottom plate of the auxiliary frame main body of the general chassis crane caused by direct connection of the auxiliary frame main body and the general chassis.
Description
Technical Field
The application belongs to the technical field of universal chassis cranes, and particularly relates to an auxiliary frame and engineering machinery.
Background
The universal chassis crane is not only a highway driving vehicle, but also a hoisting tool. The auxiliary frame is a main stressed part in the vehicle hoisting operation, and simultaneously, the auxiliary frame is used as a mounting foundation of the whole general chassis crane to support and connect the general chassis and the relevant parts of all the assemblies of the crane, and ensure that the general chassis and the crane can maintain enough arrangement space and correct relative positions.
Therefore, the auxiliary frame structure firstly meets the overall arrangement requirement of the whole vehicle, and particularly when the auxiliary frame structure is larger than a general chassis by Liang Pi, the structural design is reasonable, and the installation convenience is good. Secondly, the auxiliary frame also bears various static and dynamic loads from the crane operation on the crane and the ground, and particularly, the auxiliary frame has enough strength and rigidity during the crane operation, so that the damage caused by overlarge load is avoided.
In installation, driving and operation, the sub vehicle frame has reasonable structure, under the prerequisite of guaranteeing to match with general chassis girder, makes the sub vehicle frame cross-section have reasonable design size, makes sub vehicle frame sufficient intensity and rigidity, and it is to the matching with general chassis, complete machine normal work and safe driving to improve with general chassis matching installation, to improving sub vehicle frame atress condition, lighten general chassis hoist dead weight, promote complete machine installation convenience, promote complete machine performance, improve the reliability of general chassis hoist all have important meaning.
In the prior art, as shown in fig. 1 (a) and 1 (b), the bottom plate of the subframe 1 'is directly connected with the universal chassis girder 2', and is connected with the chassis girder 2 'through a connecting piece 3'. In the connection mode, the bottom plates of the auxiliary frames need to be kept at the same horizontal plane, so that the bottom plates of the auxiliary frames cannot be in a thin and thick plate butt joint mode; in addition, from sub vehicle frame and installation component arrangement space analysis, in order to guarantee the installation convenience, avoid simultaneously with general chassis tire, general chassis girder on the annex appear interfering scheduling problem, the cross-section width design of sub vehicle frame can only be the same with general chassis girder width at maximum, this just leads to when satisfying high hoisting performance requirement, can only rotate increase sub vehicle frame cross-section height, and then lead to the structure to produce rigidity inadequately easily, need increase sub vehicle frame weight to cause general chassis hoist complete machine height to surpass standard regulation limit value scheduling problem for satisfying the rigidity requirement.
Therefore, the conventional subframe has the problems that the assembly universality is poor, the section width of the subframe cannot be widened, the frame bottom plate cannot be butted by adopting a thin and thick plate, and the lifting performance is limited under the same weight because the conventional subframe is connected with a universal chassis.
Disclosure of Invention
In order to solve the defects of the prior art, the application provides the auxiliary frame and the engineering machinery, and solves the problems of difficult overall space arrangement, poor assembly universality, limited section width of the auxiliary frame main body and limited flatness of the bottom plate of the auxiliary frame main body of the general chassis crane caused by direct connection of the auxiliary frame main body and the general chassis.
In order to solve the defects in the prior art, the technical scheme provided by the application is as follows:
an auxiliary frame comprises an auxiliary frame main body and an auxiliary frame bottom beam;
the auxiliary frame bottom beam is connected with a chassis girder of engineering machinery positioned below; the shape of the upper part of the auxiliary frame bottom beam is matched with the shape of the lower end face of the auxiliary frame main body, the auxiliary frame bottom beam is connected with the auxiliary frame main body positioned above, and the width of the auxiliary frame bottom beam is smaller than that of the auxiliary frame main body.
Preferably, the auxiliary frame bottom beam is formed by welding a plurality of straight plates.
Preferably, the auxiliary frame bottom beam comprises two bottom beam bottom plates, a plurality of transverse partition plates, a plurality of longitudinal partition plates, two bottom beam webs and a plurality of bottom beam sealing plates;
the bottom beam webs are arranged along the length direction of a chassis girder of the engineering machinery, the two bottom beam webs are parallel to each other, two ends of the two bottom beam webs are welded with the bottom beam sealing plates, and the lower ends of the two bottom beam webs are welded with the bottom beam plate;
the transverse partition plates are arranged at intervals and are parallel to each other, two ends of the transverse partition plates are respectively welded with two bottom beam webs, the transverse partition plates are perpendicular to the bottom beam webs, and the lower ends of the transverse partition plates are welded with the bottom beam bottom plate;
the longitudinal partition plates are parallel to the bottom beam webs, are positioned between the two bottom beam webs, are welded with the bottom beam bottom plate at the lower end, are arranged at intervals, are welded with the diaphragm plates at one side, and are welded with the bottom beam sealing plates or the diaphragm plates at the other side;
the lower end of the bottom beam sealing plate is welded with the bottom beam bottom plate;
the two bottom beam bottom plates are positioned on the same horizontal plane.
Preferably, the diaphragm plates, the longitudinal diaphragm plates and the bottom beam sealing plates are provided with lightening holes.
Preferably, the sub-frame bottom beam and the lower end surface of the sub-frame main body form a box structure.
Preferably, the auxiliary frame bottom beam is formed by welding one or more of a straight plate, a bent plate, a groove plate, a channel steel and a rectangular pipe.
Preferably, the device further comprises a connecting plate;
the bottom beam web plate is provided with a plurality of bolt holes;
the connecting plate is provided with a plurality of bolt holes, the upper part of the connecting plate is connected with the bottom beam web plate through bolts, and the lower part of the connecting plate is connected with the chassis girder of the engineering machinery through bolts. .
Preferably, the sub-frame bottom beam is welded or riveted to the sub-frame body.
Preferably, the bottom plate of the auxiliary frame main body is formed by welding straight plates or bent plates with different thicknesses.
An engineering machine comprises the auxiliary frame.
The application has the beneficial effects that:
according to the application, on the basis of the existing auxiliary frame main body, the transition piece of the auxiliary frame bottom beam is added between the auxiliary frame main body and the chassis girder of the engineering machinery, so that the problems of difficult overall space arrangement of the general chassis crane, limited section width of the auxiliary frame main body and limited flatness of the bottom plate of the auxiliary frame main body caused by direct connection of the auxiliary frame main body and the general chassis are solved, the butt joint of a thin thick plate or a bent plate can be fully applied when the auxiliary frame main body is designed, the design weight is reasonable, the overall weight and lifting performance requirements of the general chassis crane are met, and meanwhile, the universality of the connection form of the auxiliary frame main body and the general chassis is improved.
Drawings
FIG. 1 (a) is a schematic view of a prior art subframe and chassis frame;
FIG. 1 (b) is a schematic diagram of a prior art connection of a subframe to a chassis frame;
FIG. 2 (a) is a schematic diagram of a prior art connector;
FIG. 2 (b) is a cross-sectional view of a prior art connector;
FIG. 3 is an exploded view of the subframe provided by the present application;
FIG. 4 is a left side view of the subframe provided by the present application;
FIG. 5 is a schematic view of a subframe sill provided by the present application;
FIG. 6 is a schematic view of a bottom plate of a subframe body provided by the present application;
FIG. 7 is a schematic view illustrating installation of a connection board according to the present application;
FIG. 8 is a schematic view of a connection board according to the present application;
wherein, 1' is a frame; 2' is a chassis girder; 3' is a connecting piece; 31' is an upper connector; 32' is a lower connector;
4 is a sub-frame main body; 41 is a first bottom plate; 42 is a second bottom plate;
5 is a sub-frame bottom beam; 51 is a bottom beam bottom plate; 52 is a diaphragm; 53 is a vertical separator; 54 is a sill web; 55 is a bottom beam sealing plate; 56 is a lightening hole; 57 is the deformation zone;
6 is a hinge point; 7 is a connecting plate.
Detailed Description
The application is further described below in connection with embodiments. The following embodiments are only for more clearly illustrating the technical aspects of the present application, and should not be used to limit the scope of the present application.
In the description of the present application, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present application will be understood in specific cases by those of ordinary skill in the art.
In the present application, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are orientation or positional relationships based on those shown in the drawings, merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the application. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.
Example 1
The present embodiment provides a subframe, see fig. 3 and 4, including a subframe main body 4, and further including a subframe bottom beam 5; the lower end face of the auxiliary frame bottom beam 5 is matched with a chassis girder of the engineering machinery positioned below, when the upper end face of the chassis girder is horizontal, the lower end face of the auxiliary frame bottom beam 5 is positioned on the same horizontal plane, and the auxiliary frame bottom beam 5 is connected with the chassis girder of the engineering machinery positioned below; the shape of the upper part of the auxiliary frame bottom beam 5 is matched with the shape of the lower end face of the auxiliary frame main body 4, the auxiliary frame bottom beam 5 is connected with the auxiliary frame main body 4 positioned above, and the width of the auxiliary frame bottom beam 5 is smaller than that of the auxiliary frame main body 4.
The auxiliary frame main body 4 consists of four hinge points 6 and a middle box type and is a box type structure mainly bearing force. On the basis of the existing auxiliary frame main body 4, a transition piece of an auxiliary frame bottom beam 5 is added between the auxiliary frame main body 4 and a chassis girder of engineering machinery, the width of the auxiliary frame bottom beam 5 is smaller than that of the auxiliary frame main body 4, and the auxiliary frame main body 4 and the auxiliary frame bottom beam 5 form a frame structure protruding downwards. The width and the joint surface of the auxiliary frame bottom beam 5 can be designed according to the structure form of the universal chassis girder, preferably, the width of the auxiliary frame bottom beam 5 is smaller than the width of the chassis girder, the height of the auxiliary frame bottom beam 5 meets the arrangement requirement of the auxiliary frame main body 4, and the auxiliary frame main body 4 cannot interfere with accessories on the universal chassis tire and the universal chassis girder. And because the width of the auxiliary frame bottom beam 5 is narrower, the form is simpler, and compared with the installation of the auxiliary frame main body 4 on the chassis girder, the installation of the auxiliary frame bottom beam 5 is more convenient. At this time, the bottom plate of the main stress structure of the auxiliary frame main body 4 can be spliced by thin and thick plates according to the requirement to lighten the structure weight, or the bending plate is selected for splicing, so that the design freedom of the bottom plate of the auxiliary frame main body 4 is greatly enhanced. Meanwhile, as the auxiliary frame main body 4 and the auxiliary frame bottom beam 5 form a frame structure protruding downwards, the auxiliary frame main body 4 can be prevented from interfering with accessories on the universal chassis tire and the universal chassis girder, the width of the auxiliary frame main body 4 is not limited by the width of the universal chassis girder, the overall design freedom of the auxiliary frame main body 4 is increased, the requirements on the overall weight and lifting performance of the universal chassis crane can be better met, the universality of the connection form of the auxiliary frame and the universal chassis is improved, and the layout and installation convenience is improved.
Optionally, the bottom beam 5 of the auxiliary frame is made of steel and is formed by welding a plurality of straight plates.
Optionally, referring to fig. 5, subframe bottom beam 5 includes two bottom beam plates 51, a plurality of cross plates 52, a plurality of longitudinal plates 53, two bottom beam webs 54, and a plurality of bottom beam seal plates 55; the bottom beam webs 54 are arranged along the length direction of a chassis girder of the engineering machinery, the two bottom beam webs 54 are parallel to each other, two ends of the two bottom beam webs are welded with the bottom beam sealing plates 55, and the lower ends of the two bottom beam webs are welded with the bottom beam bottom plate 51; the diaphragm plates 52 are arranged at intervals and are parallel to each other, two ends of each diaphragm plate are respectively welded with two bottom beam webs 54, each diaphragm plate is perpendicular to the bottom beam webs 54, and the lower ends of each diaphragm plate are welded with the bottom beam bottom plate 51; the longitudinal partition plates 53 are parallel to the bottom beam webs 54, are positioned between the two bottom beam webs 54, are welded with the bottom beam bottom plate 51 at the lower end, are arranged at intervals, are welded with the diaphragm plates 52 at one side, and are welded with the bottom beam sealing plates 55 or the diaphragm plates 52 at the other side; the bottom end of the bottom beam closing plate 55 is welded to the bottom beam plate 51. The two bottom beam floors 51 are located at the same level. The heights of the diaphragm plates 52, the longitudinal diaphragm plates 53, the bottom beam webs 54 and the bottom beam sealing plates 55 are determined according to requirements so as to meet the requirements that the upper surface of the auxiliary frame bottom beam 5 is matched with the lower end surface of the auxiliary frame main body 4, and the auxiliary frame bottom beam 5 is in seamless connection with the auxiliary frame main body 4.
Optionally, referring to fig. 5, the diaphragm plate 52, the longitudinal diaphragm plate 53 and the sill cover 55 are provided with weight reducing holes 56.
Optionally, the sub-frame bottom beam 5 and the lower end surface of the sub-frame main body 4 form a box structure.
Optionally, the subframe bottom beam 5 is formed by welding one or more of a straight plate, a bent plate, a groove plate, a channel steel and a rectangular pipe.
Alternatively, the cross section of the sub-frame bottom beam 5 is rectangular, trapezoidal or drum-shaped with the upper end surface parallel to the lower end surface.
Optionally, the subframe bottom rail 5 is welded or riveted to the subframe body 4.
Optionally, the auxiliary frame bottom beam 5 is additionally arranged, so that the limit that the bottom plates of the auxiliary frame main body 4 are required to be positioned on the same horizontal plane is eliminated, and the bottom plates of the auxiliary frame main body 4 can be formed by welding straight plates or bent plates with different thicknesses according to actual needs. Taking the subframe main body shown in CN217921192U as an example, the bottom plate is shown in fig. 6, and includes a first bottom plate 41 and four second bottom plates 42, and the four second bottom plates 42 are bottom plates at hinge points 6. Considering load distribution while reducing weight as much as possible while satisfying strength requirements, it is preferable that the second bottom plate 42 is made of a thicker steel plate and the first bottom plate 41 is made of a thinner plate. Meanwhile, as shown in fig. 5, the subframe bottom beam 5 is provided with a plurality of deformation regions 57 matching the shape of the bottom plate of the subframe main body 4 along the length direction of the subframe, so that the upper end surface of the subframe bottom beam 5 is connected and fastened with the subframe main body 4.
Alternatively, referring to FIG. 7, the sill web 54 is provided with a plurality of bolt holes. The subframe further comprises a connection plate 7. The connecting plate 7 is a high-strength steel plate. The connecting plate 7 is provided with a plurality of bolt holes, the upper part is connected with the bottom beam web 54 through bolts, and the lower part is connected with the chassis girder 2' through bolts.
Fig. 2 (a) and 2 (b) are schematic views of the connection between a frame 1' and a chassis frame 2' via a connecting member 3' in the prior art. The chassis girder 2' is provided with bolt holes. The connecting member 3' includes an upper connecting member 31' and a lower connecting member 32'; the upper connecting piece 31 'is welded with the frame 1', the lower connecting piece 32 'is fixed with the chassis girder 2' by bolts, and the upper connecting piece 31 'and the lower connecting piece 32' are fixed by bolts. Because the specifications of the universal chassis are not uniform, the positions of the bolt holes formed in the chassis girder 2' are different, and the upper connecting piece 31' is welded and fixed with the frame 1', so that difficulties exist in assembly, and design cost and processing cost are increased.
In the application, the auxiliary frame bottom beam 5 does not participate in the hanging weight stress, so the plurality of bolt holes are arranged on the bottom beam web 54, thereby avoiding the influence of frame strength and aesthetic degree caused by the perforation on the auxiliary frame main body 4. The connecting structure of the connecting plate 7 and the bottom beam web plate 54 provided by the application can be matched with different universal chassis, and only proper bolt holes are selected on the bottom beam web plate 54 for installation, so that the design and manufacturing cost is reduced; and the connecting structure does not need welding, reduces the installation difficulty, and is simple and convenient to operate. When the width of the subframe bottom beam 5 is equal to the width of the chassis frame 2', the flat-plate type connection plate 7 shown in fig. 7 may be directly selected. When the width of the subframe bottom beam 5 is smaller than the width of the chassis frame girder 2', the connection plate 7 with a broken line type cross section as shown in fig. 8 is optional. The subframe bottom beams 5 are preferably of the same width as the chassis frame beams 2'.
The auxiliary frame bottom beam provided by the embodiment can be used for engineering machinery such as a crane and the like.
Example two
The embodiment provides an engineering machine, which comprises the auxiliary frame in the first embodiment. The engineering machinery can be a crane or other engineering machinery with the subframe width limited by the width of the universal chassis girder.
The foregoing is merely a preferred embodiment of the present application, and it should be noted that modifications and variations could be made by those skilled in the art without departing from the technical principles of the present application, and such modifications and variations should also be regarded as being within the scope of the application.
Claims (10)
1. The auxiliary frame comprises an auxiliary frame main body and is characterized by further comprising an auxiliary frame bottom beam;
the auxiliary frame bottom beam is connected with a chassis girder of engineering machinery positioned below; the shape of the upper part of the auxiliary frame bottom beam is matched with the shape of the lower end face of the auxiliary frame main body, the auxiliary frame bottom beam is connected with the auxiliary frame main body positioned above, and the width of the auxiliary frame bottom beam is smaller than that of the auxiliary frame main body.
2. A subframe according to claim 1 wherein said subframe bottom rail is welded from a plurality of straight panels.
3. A subframe according to claim 2 wherein said subframe bottom beam comprises two bottom beam plates, a plurality of cross plates, a plurality of longitudinal plates, two bottom beam webs and a plurality of bottom beam seal plates;
the bottom beam webs are arranged along the length direction of a chassis girder of the engineering machinery, the two bottom beam webs are parallel to each other, two ends of the two bottom beam webs are welded with the bottom beam sealing plates, and the lower ends of the two bottom beam webs are welded with the bottom beam plate;
the transverse partition plates are arranged at intervals and are parallel to each other, two ends of the transverse partition plates are respectively welded with two bottom beam webs, the transverse partition plates are perpendicular to the bottom beam webs, and the lower ends of the transverse partition plates are welded with the bottom beam bottom plate;
the longitudinal partition plates are parallel to the bottom beam webs, are positioned between the two bottom beam webs, are welded with the bottom beam bottom plate at the lower end, are arranged at intervals, are welded with the diaphragm plates at one side, and are welded with the bottom beam sealing plates or the diaphragm plates at the other side;
the lower end of the bottom beam sealing plate is welded with the bottom beam bottom plate;
the two bottom beam bottom plates are positioned on the same horizontal plane.
4. A subframe according to claim 3 wherein said cross, longitudinal and sill cover plates are provided with lightening apertures.
5. A subframe according to claim 1 wherein said subframe bottom rail and said subframe body lower end face form a box-like structure.
6. The subframe of claim 1 wherein said subframe bottom rail is welded from one or more of straight plates, bent plates, channel steel, rectangular tubes.
7. A subframe according to claim 3, further comprising a connection plate (7);
the bottom beam web (54) is provided with a plurality of bolt holes;
the connecting plate (7) is provided with a plurality of bolt holes, the upper part of the connecting plate is connected with the bottom beam web (54) through bolts, and the lower part of the connecting plate is connected with the chassis girder of the engineering machinery through bolts.
8. A subframe according to claim 1 wherein the subframe base beam is welded or riveted to the subframe body.
9. A subframe according to claim 1, wherein the base plate of the subframe body is welded from straight or curved plates of different thickness.
10. A construction machine comprising a subframe according to any one of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310790239.2A CN116750089A (en) | 2023-06-30 | 2023-06-30 | Auxiliary frame and engineering machinery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310790239.2A CN116750089A (en) | 2023-06-30 | 2023-06-30 | Auxiliary frame and engineering machinery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116750089A true CN116750089A (en) | 2023-09-15 |
Family
ID=87949535
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310790239.2A Pending CN116750089A (en) | 2023-06-30 | 2023-06-30 | Auxiliary frame and engineering machinery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116750089A (en) |
-
2023
- 2023-06-30 CN CN202310790239.2A patent/CN116750089A/en active Pending
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