CN221563213U - Double-fork-arm front knuckle structure and vehicle - Google Patents
Double-fork-arm front knuckle structure and vehicle Download PDFInfo
- Publication number
- CN221563213U CN221563213U CN202323453630.8U CN202323453630U CN221563213U CN 221563213 U CN221563213 U CN 221563213U CN 202323453630 U CN202323453630 U CN 202323453630U CN 221563213 U CN221563213 U CN 221563213U
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- swing arm
- lower swing
- knuckle
- groove
- knuckle body
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- 239000000463 material Substances 0.000 claims abstract description 7
- 230000009977 dual effect Effects 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims 1
- 238000006056 electrooxidation reaction Methods 0.000 description 8
- 238000009434 installation Methods 0.000 description 7
- 239000000725 suspension Substances 0.000 description 5
- 238000012423 maintenance Methods 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- 238000009713 electroplating Methods 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- Steering-Linkage Mechanisms And Four-Wheel Steering (AREA)
Abstract
A front knuckle structure with double fork arms and a vehicle are suitable for mounting a lower swing arm, and comprise a knuckle body; the connecting piece is connected with one end of the steering knuckle body and is made of the same material as the steering knuckle body; wherein: the connecting piece is provided with a lower swing arm mounting point, and the lower swing arm is mounted at the lower swing arm mounting point of the connecting piece.
Description
Technical Field
The utility model relates to the technical field of automobile parts, in particular to a double-fork-arm front knuckle structure and a vehicle.
Background
The suspension system is a generic term for all drive connections between the frame of the vehicle and the axles or wheels, which function to transmit torsion forces acting between the wheels and the frame, and to cushion the impact forces imparted to the frame or body by the uneven road surface and to attenuate the vibrations caused thereby, so as to ensure smooth running of the vehicle. Because the double-fork arm suspension has strong transverse rigidity, good anti-tilting capability, strong road feel, good ground grabbing force and strong control force, and meanwhile, the comfort is better than that of the Macpherson suspension, more and more vehicles use the double-fork arm suspension.
The front knuckle is an important part in a suspension system, and is connected with a swing arm, a knuckle, a brake disc, a hub bearing and the like, the front knuckle of a common double-fork arm is generally installed by embedding a steel sleeve made of steel into the installation point of the front lower swing arm and the rear lower swing arm, the steel sleeve is used for preventing electrochemical corrosion of the front knuckle made of aluminum, electroplating is further needed, an isolated aluminum piece is contacted with an iron piece, when the electroplating is not in place, the front knuckle can find electrochemical corrosion, the service life of the front knuckle is shortened, and the whole front knuckle is needed to be replaced in severe cases.
Disclosure of utility model
Therefore, the utility model aims to provide a double-fork-arm front knuckle structure and a vehicle, which are used for solving the technical problems that in the prior art, when electroplating is not in place, electrochemical corrosion can occur on the front knuckle and the service life of the front knuckle is shortened.
The utility model provides a double-fork arm front knuckle structure, which is suitable for installing a lower swing arm and comprises the following components:
A knuckle body;
The connecting piece is connected with one end of the steering knuckle body and is made of the same material as the steering knuckle body;
wherein: the connecting piece is provided with a lower swing arm mounting point, and the lower swing arm is mounted at the lower swing arm mounting point of the connecting piece.
Optionally, the connecting piece and the knuckle body are detachably connected.
Optionally, the connecting piece is dorsad be provided with connecting bolt on knuckle body one side, connecting bolt dorsad its nut one end penetrates in proper order the connecting piece with in the knuckle body until connecting bolt's nut with the connecting piece is contradicted, connecting bolt with knuckle body threaded connection.
Optionally, the connecting piece corresponds connecting bolt department has seted up first connecting hole, knuckle body orientation connecting groove that corresponds with first connecting hole has been seted up on connecting piece one side, be provided with the internal thread on the spread groove inner wall, connecting bolt is dorsad its nut one end penetrates in proper order first connecting hole with in the spread groove until connecting bolt's nut with the connecting piece is contradicted, connecting bolt with spread groove inner wall threaded connection.
Optionally, the first connecting hole is towards connecting groove one side week edge is provided with the boss, the boss sets up to annular just the interior anchor ring of boss forms first connecting hole, the boss stretches into in the connecting groove and the outer loop face of boss with the connecting groove laminating.
Optionally, the second connecting hole has been seted up to lower swing arm mounting point department, lower swing arm orientation second connecting hole department is provided with the connecting rod, connecting rod one end is connected with lower swing arm, and the other end passes the second connecting hole, the connecting rod dorsad be provided with swing arm installation nut on the lower swing arm one end, swing arm installation nut with connecting rod threaded connection just with the connecting piece is contradicted.
Optionally, the second connecting hole includes first portion and second portion, first portion is the funnel form, just the tip of first portion with second portion one end is connected and is linked together, be provided with on the connecting rod lateral wall with the lug of first portion adaptation, works as the connecting rod dorsad down swing arm one end stretches into in proper order in first portion and the second portion and follow in the second portion wears out, the lug with the inside wall of first portion is contradicted, restriction the lug is toward the second portion removes.
Optionally, the holding groove has been seted up between the knuckle body with the connecting piece, the second connecting hole orientation the one end of knuckle body with the holding groove intercommunication, lower swing arm has one side of connecting rod is located in the holding groove just the connecting rod is followed the second connecting hole with the one end department of holding groove intercommunication passes the second connecting hole.
Optionally, the connecting bolts are provided with two, and the first connecting hole with the spread groove is provided with two correspondingly, two connecting bolts are about the connecting rod symmetry sets up.
The utility model also provides a vehicle comprising the double-fork-arm front knuckle structure.
The technical scheme of the utility model has the following advantages:
1. According to the double-fork-arm front knuckle structure, the lower swing arm is installed by arranging the connecting piece on the knuckle body, and the connecting piece and the knuckle body are made of the same material, so that electrochemical corrosion of the knuckle body can be effectively avoided, the service life of the knuckle body is prolonged, and the reliability of a product is improved.
2. According to the double-fork-arm front steering knuckle structure, when electrochemical corrosion occurs in the double-fork-arm front steering knuckle structure, only the connecting piece connected with the lower swing arm is detached for maintenance or replacement, the front steering knuckle body is not required to be detached, and as the steering knuckle body is also connected with other structures, only the connecting piece is detached, so that the steps of detachment are reduced, and the detachment, replacement and maintenance are more convenient.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present utility model and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of the overall structure of a dual yoke front knuckle structure of the present utility model;
FIG. 2 is an exploded view of the knuckle body and connector of the present utility model;
FIG. 3 is a schematic view of a knuckle body according to the present utility model;
FIG. 4 is a schematic view of a connector according to the present utility model;
FIG. 5 is a schematic rear view of a connector according to the present utility model;
fig. 6 is a schematic view of a lower swing arm in the present utility model.
Reference numerals illustrate:
1. A knuckle body; 2. a connecting piece; 4. a first connection hole; 5. a connecting groove; 6. a connecting bolt; 7. a boss; 8. a second connection hole; 81. a first portion; 82. a second portion; 9. a swing arm mounting nut; 10. a lower swing arm; 11. a connecting rod; 12. a bump; 13. an accommodating groove.
Detailed Description
Specific embodiments of the present utility model will be described in detail below with reference to the accompanying drawings. It will be apparent that the described embodiments are only some, but not all, embodiments of the utility model. All other embodiments, which can be made by those skilled in the art without making any inventive effort, are intended to be within the scope of the present utility model.
Unless specifically stated and limited otherwise, the terms "disposed," "mounted," "connected," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the terms described above will be understood to those of ordinary skill in the art in a specific context.
The terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," and the like are used as references to orientations or positional relationships based on the orientation or positional relationships shown in the drawings, or the orientation or positional relationships in which the inventive product is conventionally disposed in use, merely for convenience of description and simplicity of description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be configured and operated in a particular orientation, and therefore are not to be construed as limiting the utility model.
The terms "first," "second," "third," and the like, are merely used for distinguishing between similar elements and not necessarily for indicating or implying a relative importance or order.
The terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a list of elements does not include only those elements but may include other elements not expressly listed.
Example 1
Referring to fig. 1-6, the utility model provides a double-fork-arm front knuckle structure, which is suitable for installing a lower swing arm 10, and comprises a knuckle body 1 and a connecting piece 2, wherein the knuckle body 1 is connected with an upper swing arm, a forklift disc, a hub bearing and other structures, the connecting piece 2 is arranged on one end of the knuckle body 1 and is connected with the end of the knuckle body 1, the connecting piece 2 and the knuckle body 1 are made of the same material, and are all made of aluminum, wherein a lower swing arm mounting point is arranged on the connecting piece 2, and the lower swing arm 10 is arranged on a lower swing arm mounting position of the connecting piece 2.
Install down swing arm 10 through setting up connecting piece 2 on knuckle body 1, and connecting piece 2 and knuckle body 1 constitute with the material, thereby can effectually avoid appearing knuckle body 1 and take place the risk of electrochemical corrosion, improve knuckle body 1's life, the reliability of product has been improved, and lower swing arm 10 can set up to the integrated swing arm down, swing arm and lower swing arm integration down in a lower swing arm 10 in the front, consequently only need set up a lower swing arm mounting point and can realize the installation to lower swing arm 10, whole weight has been alleviateed, the performance has been promoted, thereby the unsprung mass has been alleviateed, operability and travelling comfort have been promoted.
As a specific embodiment, the connecting piece 2 is detachably connected with the knuckle body 1, when the knuckle structure before the double fork arms is subjected to electrochemical corrosion, the connecting piece 2 connected with the lower swing arm 10 is only required to be detached for maintenance or replacement, the knuckle body 1 before the disassembly is not required, and as the knuckle body 1 is also connected with other structures, only the connecting piece 2 is detached, so that the steps of disassembly are reduced, and the disassembly, the replacement and the maintenance are more convenient.
Specifically, referring to fig. 1, a connecting bolt 6 is disposed on one side of the connecting piece 2 opposite to the knuckle body 1, the connecting bolt 6 penetrates into the connecting piece 2 and the knuckle body 1 in sequence and is in threaded connection with the connecting piece 2 and the knuckle body 1, the connecting piece 2 is detachably connected to the knuckle body 1 in a threaded connection manner, when the connecting piece 2 is mounted on the knuckle body 1, the connecting bolt 6 is rotated, one end of the connecting bolt 6 opposite to a nut of the connecting bolt 6 penetrates into the connecting piece 2 and the knuckle body 1 in sequence, the connecting bolt 6 is in threaded connection with the knuckle body 1 until the nut of the connecting bolt 6 abuts against the side wall of the connecting piece 2, the connecting bolt 6 is screwed on the connecting piece 2, the connecting piece 2 is detachably connected to the knuckle body 1, and when the connecting piece 2 needs to be detached, the connecting bolt 6 is directly reversely rotated at the moment to screw out the connecting piece 2 and the knuckle body 1, so that the connecting piece 2 and the knuckle body 1 are detached, and the connecting piece 2 is replaced or maintained more conveniently.
In order to enable the connecting bolt 6 to be in threaded connection with the connecting piece 2 and the knuckle body 1, a first connecting hole 4 is formed in the position, corresponding to the connecting bolt 6, of the connecting piece 2, a connecting groove 5 corresponding to the first connecting hole 4 is formed in one side, facing the connecting piece 2, of the knuckle body 1, internal threads are formed in the inner wall of the connecting groove 5, when the connecting piece 2 and the knuckle body 1 are spliced, the first connecting hole 4 and the connecting groove 5 are coaxial, the cross sections are identical in size, internal threads corresponding to the external threads of the connecting bolt 6 are formed in the inner walls of the first connecting hole 4 and the connecting groove 5, one end, opposite to a nut, of the connecting bolt 6 sequentially penetrates into the first connecting hole 4 and the connecting groove 5, and the connecting bolt 6 is in threaded connection with the inner wall of the connecting groove 5 until the nut of the connecting bolt 6 abuts against the side wall of the connecting piece 2, so that the connecting piece 2 is limited to move, and the connecting piece is detachably fixed on the knuckle body 1.
As an improved embodiment, referring to fig. 2-4, the first connecting hole 4 is provided with a boss 7 towards one side periphery of the connecting groove 5, the boss 7 is provided in a ring shape, the inner ring surface of the boss 7 forms the first connecting hole 4, the boss 7 stretches into the connecting groove 5, the outer ring surface of the boss 7 is attached to the inner wall surface of the connecting groove 5, before connecting through the connecting bolt 6, the connecting piece 2 is firstly moved towards the direction of the knuckle body 1, the boss 7 stretches into the connecting groove 5, the outer wall of the boss 7 is attached to the inner wall of the connecting groove 5, so that the first connecting hole 4 on the connecting piece 2 is coaxial with the connecting groove 5, the connecting piece 2 can only slide along the length direction of the first connecting hole 4, but cannot slide along the other directions of the knuckle body 1, so that the positioning effect is achieved on the connecting piece 2, after the boss 7 enters into the connecting groove 5, the first connecting hole 4 is coaxial with the connecting groove 5, the position of the connecting piece 2 is adjusted on the knuckle body 1 without manpower, so that the first connecting hole 4 and the connecting groove 5 are coaxial, and the assembly is simpler. In addition, the boss 7 is directly arranged at the periphery of the first connecting hole 4 and directly stretches into the connecting groove 5 to be positioned, so that an additional positioning groove is not required to be additionally formed in the steering knuckle body 1, a corresponding boss is formed in the other position of the connecting piece 2, and the boss stretches into the positioning groove to realize positioning, thereby reducing characteristics and manufacturing time.
As a specific embodiment, referring to fig. 2 and 3, the second connecting hole 8 is provided at the mounting point of the lower swing arm, the connecting rod 11 is provided at the position of the lower swing arm 10 facing the second connecting hole 8, one end of the connecting rod 11 is connected with the lower swing arm 10, the other end passes through the second connecting hole 8, the connecting rod 11 is provided with the swing arm mounting nut 9 on one end of the lower swing arm 10, the outer wall of the connecting rod 11 is provided with external threads adapted to the internal threads of the swing arm mounting nut 9, the swing arm mounting nut 9 and the connecting rod 11 are in threaded connection and abut against the connecting piece 2, during installation, firstly, one end of the connecting rod 11 facing away from the lower swing arm 10 extends into one end of the second connecting hole 8 and extends out of the other end of the second connecting hole 8, the swing arm mounting nut 9 is taken out, the swing arm mounting nut 9 is sleeved on one section of the connecting rod 11 extending out of the second connecting hole 8, and is in threaded connection with the connecting rod 11, at this moment, the swing arm mounting nut 9 is continuously rotated, the swing arm mounting nut 9 is screwed into the direction of the connecting piece 2 until the side wall of the swing arm mounting nut 9 and the connecting piece 2 abuts against, thereby stably mounting the connecting rod 11 on the connecting piece 2, and the lower swing arm 10 is realized.
The connecting bolt 6 is provided with two, and first connecting hole 4 and spread groove 5 correspond and are provided with two, and two connecting bolt 6 set up about connecting rod 11 symmetry, through with connecting bolt 6, first connecting hole 4 and spread groove 5 all are provided with two to during the installation, two connecting bolt 6 correspond respectively to stretch into two sets of first connecting hole 4 and spread groove 5 in realizing threaded connection, improve the stability that connecting piece 2 can dismantle the connection.
Specifically, referring to fig. 2-5, the second connecting hole 8 includes a first portion 81 and a second portion 82, the first portion 81 is funnel-shaped, a small end of the first portion 81 is connected and communicated with one end of the second portion 82, a bump 12 adapted to the first portion 81 is provided on a side wall of the connecting rod 11, when one end of the connecting rod 11 facing away from the lower swing arm 10 sequentially extends into the first portion 81 and the second portion 82 and passes out of the second portion 82, the bump 12 abuts against an inner side wall of the first portion 81 to limit the bump 12 to move towards the second portion 82, the bump 12 and the funnel-shaped first portion 81 are provided, when one end of the connecting rod 11 facing away from the lower swing arm 10 sequentially extends into the first portion 81 and the second portion 82 until the bump 12 is attached to an inner wall of the first portion 81, the connecting rod 11 cannot move towards the second portion 82, so as to position the connecting rod 11, the mounting nut 9 is only required to be taken out, the mounting nut 9 is sleeved on one section of the connecting rod extending out of the second connecting hole 8 until the threaded mounting nut 9 is screwed into the connecting rod, and the connecting rod 2 is screwed into the lower swing arm 10, and the connecting rod 10 can be limited to move towards the lower swing arm 11, and the connecting rod 10 is stably mounted in the direction; in addition, the step surface is arranged on the bump 12, when the bump 12 stretches into the first part 81 and is attached to the first part 81, the step surface on the bump 12 is attached to the periphery of one end of the first part 81, which is opposite to the second part 82, so that the dustproof effect is achieved, and external impurities are prevented from entering the first part 81 and the second part 82 to damage parts.
The holding tank 13 has been seted up between knuckle body 1 and connecting piece 2, lower swing arm mounting point is located holding tank 13, the one end and the holding tank 13 intercommunication of second connecting hole 8 orientation knuckle body 1, one side that lower swing arm 10 has connecting rod 11 is located holding tank 13, connecting rod 11 passes second connecting hole 8 from the one end department of second connecting hole 8 and holding tank 13 intercommunication, through setting up holding tank 13, make lower swing arm 10 can install in connecting piece 2 orientation knuckle body 1 one side, can also alleviate the weight of knuckle structure before the bifurcate arm simultaneously, the performance has been promoted, the unsprung mass has been alleviateed, operability and travelling comfort have been promoted.
Example 2
Referring to fig. 1 to 6, this embodiment provides a vehicle, including the front knuckle structure of two fork arms in embodiment 1, install lower swing arm 10 through setting up connecting piece 2 on knuckle body 1, and connecting piece 2 and knuckle body 1 constitute with the material, thereby can effectually avoid appearing knuckle body 1 and take place the risk of electrochemical corrosion, improve knuckle body 1's life, the reliability of product has been improved, and set up lower swing arm down as lower swing arm 10 around, consequently only need set up a lower swing arm mounting point and can realize the installation to lower swing arm 10, whole alleviateed weight, the performance has been promoted, thereby the unsprung mass has been alleviateed, and operability and travelling comfort have been promoted.
It should be noted that, in the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described as different from other embodiments, and identical and similar parts between the embodiments are all enough to be referred to each other.
The foregoing is merely illustrative of the present utility model, and the present utility model is not limited thereto, and any changes or substitutions easily contemplated by those skilled in the art within the scope of the present utility model should be included in the present utility model.
Claims (10)
1. A double wishbone front knuckle structure adapted to mount a lower swing arm, comprising:
A knuckle body;
The connecting piece is connected with one end of the steering knuckle body and is made of the same material as the steering knuckle body;
wherein: the connecting piece is provided with a lower swing arm mounting point, and the lower swing arm is mounted at the lower swing arm mounting point of the connecting piece.
2. The dual yoke front knuckle structure of claim 1, wherein said connector is removably connected to said knuckle body.
3. The double-fork front knuckle structure of claim 1, wherein a connecting bolt is provided on a side of the connecting member facing away from the knuckle body, one end of the connecting bolt facing away from a nut thereof sequentially penetrates into the connecting member and the knuckle body until the nut of the connecting bolt collides with the connecting member, and the connecting bolt is screwed with the knuckle body.
4. The double-fork-arm front knuckle structure according to claim 3, wherein a first connecting hole is formed in the position, corresponding to the connecting bolt, of the connecting piece, a connecting groove corresponding to the first connecting hole is formed in one side, facing the connecting piece, of the knuckle body, internal threads are formed in the inner wall of the connecting groove, one end, facing away from a nut, of the connecting bolt penetrates into the first connecting hole and the connecting groove in sequence until the nut of the connecting bolt abuts against the connecting piece, and the connecting bolt is in threaded connection with the inner wall of the connecting groove.
5. The double-fork front knuckle structure of claim 4, wherein the first connecting hole is provided with a boss toward a side peripheral edge of the connecting groove, the boss is provided in a ring shape and an inner ring surface of the boss forms the first connecting hole, the boss extends into the connecting groove and an outer ring surface of the boss is attached to the connecting groove.
6. The double-fork front knuckle structure of claim 4, wherein a second connecting hole is formed at the mounting point of the lower swing arm, a connecting rod is arranged at the position of the lower swing arm towards the second connecting hole, one end of the connecting rod is connected with the lower swing arm, the other end of the connecting rod penetrates through the second connecting hole, a swing arm mounting nut is arranged at one end of the connecting rod, facing away from the lower swing arm, and the swing arm mounting nut is in threaded connection with the connecting rod and is in interference with the connecting piece.
7. The dual yoke front knuckle structure of claim 6, wherein the second connecting hole includes a first portion and a second portion, the first portion is funnel-shaped, and the small end of the first portion is connected to and communicates with one end of the second portion, a bump adapted to the first portion is provided on the side wall of the connecting rod, and when the end of the connecting rod opposite to the lower swing arm sequentially extends into the first portion and the second portion and passes out of the second portion, the bump abuts against the inner side wall of the first portion to limit the movement of the bump toward the second portion.
8. The double-wishbone front knuckle structure according to claim 6 wherein an accommodating groove is provided between the knuckle body and the connecting piece, one end of the second connecting hole facing the knuckle body communicates with the accommodating groove, one side of the lower swing arm having the connecting rod is located in the accommodating groove, and the connecting rod passes through the second connecting hole from one end of the second connecting hole communicating with the accommodating groove.
9. The double-wishbone front knuckle structure according to claim 6 wherein there are two connecting bolts, and the first connecting hole and the connecting groove are provided two corresponding, and the two connecting bolts are symmetrically disposed about the connecting rod.
10. A vehicle comprising a double wishbone front knuckle structure according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323453630.8U CN221563213U (en) | 2023-12-18 | 2023-12-18 | Double-fork-arm front knuckle structure and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323453630.8U CN221563213U (en) | 2023-12-18 | 2023-12-18 | Double-fork-arm front knuckle structure and vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221563213U true CN221563213U (en) | 2024-08-20 |
Family
ID=92296347
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202323453630.8U Active CN221563213U (en) | 2023-12-18 | 2023-12-18 | Double-fork-arm front knuckle structure and vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221563213U (en) |
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2023
- 2023-12-18 CN CN202323453630.8U patent/CN221563213U/en active Active
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