CN215789607U - Screw up auxiliary fixtures - Google Patents
Screw up auxiliary fixtures Download PDFInfo
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- CN215789607U CN215789607U CN202121395398.5U CN202121395398U CN215789607U CN 215789607 U CN215789607 U CN 215789607U CN 202121395398 U CN202121395398 U CN 202121395398U CN 215789607 U CN215789607 U CN 215789607U
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- tightening
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- auxiliary tool
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Abstract
The utility model discloses a tightening auxiliary tool which is used for assisting a tightening shaft to perform tightening operation, wherein a tightening head is arranged at one end of the tightening shaft; the tightening auxiliary tool comprises an adjusting assembly, a rotating assembly and a connecting assembly, wherein the adjusting assembly comprises an adjusting block and a supporting upright post which is vertically arranged, the adjusting block is slidably sleeved outside the supporting upright post, and the supporting upright post is used for being connected with external equipment; the rotating assembly comprises a rotating block and a rotating shaft which is transversely arranged, the rotating shaft is rotatably connected with the adjusting block, and the rotating block is sleeved outside the rotating shaft and is arranged at an interval with the adjusting block; the connecting assembly comprises a connecting plate and a mounting plate, the connecting plate is connected between the rotating block and the mounting plate, the mounting plate is connected with the tightening shaft, the tightening shaft vertically penetrates through the mounting plate, and the tightening head is located above the mounting plate. The tightening auxiliary tool offsets the reaction force generated by the tightening shaft, improves the stability and the operation safety of the tightening shaft, has adjustable angle of the tightening shaft, is accurate in alignment, and improves the tightening quality.
Description
Technical Field
The utility model relates to the technical field of automobile manufacturing, in particular to a screwing auxiliary tool.
Background
In the automobile manufacturing industry, in order to ensure the connection strength between parts, a tightening operation is generally required to be performed by using a tightening shaft, when the tightening operation is performed by using the tightening shaft for rear overhang tightening of an automobile, the tightening torque is extremely large and generates a large reaction force, an operator is difficult to hold the tightening shaft, the operator is easily injured, the operation safety is low, the manual operation of holding the tightening shaft is misaligned, and the tightening quality is poor.
SUMMERY OF THE UTILITY MODEL
The utility model mainly aims to provide a screwing auxiliary tool and aims to solve the problems of low operation safety and poor screwing quality during automobile rear overhang screwing operation.
In order to achieve the purpose, the utility model provides a tightening auxiliary tool, which is used for assisting a tightening shaft to perform tightening operation, wherein one end of the tightening shaft is provided with a tightening head; screw up auxiliary fixtures includes:
the adjusting assembly comprises an adjusting block and a supporting upright which is vertically arranged, the adjusting block is slidably sleeved outside the supporting upright, and the supporting upright is used for being connected with external equipment;
the rotating assembly comprises a rotating block and a rotating shaft which is transversely arranged, the rotating shaft is rotatably connected with the adjusting block, and the rotating block is sleeved outside the rotating shaft and is arranged at an interval with the adjusting block;
coupling assembling, coupling assembling includes connecting plate and mounting panel, the connecting plate connect in the turning block with between the mounting panel, the mounting panel with screw up the hub connection, screw up the vertical passing of axle the mounting panel, just the tightening head is located the top of mounting panel.
Preferably, the number of the connecting plates is two, the two connecting plates are respectively connected to two sides of the rotating block, the mounting plate is located above the two connecting plates, the mounting plate is transversely arranged, each connecting plate is bent to form a first bending portion, the first bending portions are transversely arranged, and the first bending portions are arranged at the bottom of the mounting plate in a stacked mode.
Preferably, each connecting plate bending type is formed with the second kink, the second kink sets up transversely, just the second kink with first kink interval sets up, screw up auxiliary fixtures and still include two regulation handles, two regulation handles respectively with two the second kink corresponds the connection.
Preferably, a first rotating plate is connected below the second bending part, and the adjusting handle is detachably connected with the first rotating plate.
Preferably, a first waist-shaped hole which vertically extends is formed in the first adapter plate, a first mounting lug is arranged on the adjusting handle, a first mounting hole is formed in the position, corresponding to the first waist-shaped hole, of the first mounting lug, and the first waist-shaped hole is connected with the first mounting hole through a fastener.
Preferably, coupling assembling still includes first cab apron and second cab apron of crossing, the vertical setting of first cab apron of crossing, the second is crossed the cab apron and is transversely set up, the both ends of first cab apron of crossing respectively with two the connecting plate corresponds and is connected, the second cross the cab apron with first cab apron is connected, screw up auxiliary fixtures and still include operating handle, operating handle with the cab apron is connected to the second.
Preferably, a second adapter plate is connected to the lower portion of the second transition plate, and the operating handle is detachably connected with the second adapter plate.
Preferably, a second waist-shaped hole which extends vertically is formed in the second adapter plate, a second mounting lug is arranged on the operating handle, a second mounting hole is formed in the position, corresponding to the second waist-shaped hole, of the second mounting lug, and the second waist-shaped hole is connected with the second mounting hole through a fastener.
Preferably, coupling assembling still includes the reinforcing plate, the reinforcing plate transversely sets up, just the reinforcing plate is folded and is located the bottom of mounting panel.
Preferably, the rotating assembly further comprises two thrust bearings, the two thrust bearings are sleeved outside the rotating shaft and are respectively abutted against two sides of the rotating block.
When the tightening auxiliary tool is used for performing rear overhang tightening operation on an automobile, firstly, the adjusting block can vertically slide along the supporting upright post, an operator enables the tightening auxiliary tool to drive the tightening shaft to vertically move by adjusting the height of the adjusting block relative to the supporting upright post so as to adjust the tightening shaft to a proper height, then, the operator enables the tightening shaft to drive the rotating assembly to rotate relative to the adjusting assembly by holding the tightening shaft, namely, the tightening shaft drives the mounting plate, the connecting plate, the rotating block and the rotating shaft which are sequentially connected to rotate, the rotating shaft rotates relative to the adjusting block so as to adjust the tightening head to be aligned with a part to be tightened, the tightening shaft is started, the tightening head rotates relative to the tightening shaft to perform tightening operation, in the tightening process, the supporting upright post is connected to external equipment so that the tightening auxiliary tool is kept still relative to the external equipment from beginning to end, and the reaction force generated by the tightening shaft is counteracted, the convenient operator grips and screws up the axle, has both ensured that the operator is not hurt, has improved the operation security, has improved the stability of screwing up the axle again, has promoted and screws up the quality to through the height and the angle of screwing up the adjustable axle of auxiliary fixtures, counterpoint accurate, further promoted and screwed up the quality.
Drawings
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 structures shown in the drawings without creative efforts.
Fig. 1 is a schematic front view illustrating a tightening shaft assembled to a tightening auxiliary tool according to an embodiment of the present invention;
FIG. 2 is an enlarged view of area A of FIG. 1;
FIG. 3 is a schematic left side view of a tightening shaft assembled to a tightening assist fixture according to an embodiment of the present invention;
fig. 4 is a schematic top view of a tightening shaft assembled to a tightening auxiliary tool according to an embodiment of the present invention.
The reference numbers illustrate:
| reference numerals | Name (R) | Reference numerals | Name (R) |
| 100 | Screw up |
32 | Mounting plate |
| 10 | Adjusting |
33 | |
| 11 | Regulating |
34 | |
| 12 | Supporting |
341 | |
| 20 | |
3411 | Second waist- |
| 21 | |
35 | Reinforcing |
| 22 | |
40 | Adjusting |
| 23 | Thrust bearing | 41 | |
| 30 | Connecting |
411 | |
| 31 | Connecting |
50 | Operating handle |
| 311 | A |
51 | Second mounting ear |
| 312 | A |
511 | |
| 313 | |
200 | |
| 3131 | First waist- |
201 | Tightening head |
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments will be described clearly and completely with reference to the drawings in the embodiments, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that all the directional indications (such as up, down, left, right, front, and rear … …) in the present embodiment are only used to explain the relative positional relationship between the components, the movement, and the like in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indication is changed accordingly.
In addition, the descriptions related to "first", "second", etc. in the present invention are only for descriptive purposes and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "connected," "secured," and the like are to be construed broadly, and for example, "secured" may be a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In addition, the technical solutions in the embodiments of the present invention may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination of technical solutions should not be considered to exist, and is not within the protection scope of the present invention. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.
The description of the orientations of "up", "down", "front", "rear", "left", "right", etc. in the present invention is based on the orientations shown in fig. 1 to 4, and is only for explaining the relative positional relationship between the respective members in the postures shown in fig. 1 to 4, and if the specific posture is changed, the directional indication is changed accordingly.
The utility model provides a screwing auxiliary tool.
In the tightening auxiliary tool 100 of the present embodiment, the tightening auxiliary tool 100 is used for assisting the tightening shaft 200 in performing a tightening operation, and one end of the tightening shaft 200 is provided with a tightening head 201; the screwing auxiliary tool 100 comprises an adjusting assembly 10, a rotating assembly 20 and a connecting assembly 30, wherein the adjusting assembly 10 comprises an adjusting block 11 and a supporting upright 12 which is vertically arranged, the adjusting block 11 is slidably sleeved outside the supporting upright 12, and the supporting upright 12 is used for being connected with external equipment; the rotating assembly 20 comprises a rotating block 21 and a rotating shaft 22 which is transversely arranged, the rotating shaft 22 is rotatably connected with the adjusting block 11, and the rotating block 21 is sleeved outside the rotating shaft 22 and is arranged at intervals with the adjusting block 11; the coupling assembly 30 includes a coupling plate 31 and a mounting plate 32, the coupling plate 31 is coupled between the turning block 21 and the mounting plate 32, the mounting plate 32 is coupled with the tightening shaft 200, the tightening shaft 200 vertically penetrates the mounting plate 32, and the tightening head 201 is located above the mounting plate 32.
As shown in fig. 1, 3 and 4, the tightening shaft 200 passes through the mounting plate 32 and is connected to the mounting plate 32, one end of the connecting plate 31 is connected to the mounting plate 32, the other end of the connecting plate 31 is connected to the rotating block 21, the rotating block 21 is sleeved outside the rotating shaft 22, the rotating shaft 22 extends in the front-rear direction, the rotating block 21 and the adjusting block 11 are arranged at intervals in the front-rear direction, the adjusting block 11 is sleeved outside the supporting upright 12, the supporting upright 12 extends in the up-down direction, the supporting upright 12 is used for being connected to an external device, so that the tightening shaft 200 is connected to the external device through the tightening auxiliary tool 100, and the external device is a machine capable of driving the tightening auxiliary tool 100 and the tightening shaft 200 to move in all directions.
When performing the rear overhang tightening operation of the automobile, firstly, the adjusting block 11 can slide up and down along the supporting upright 12, the operator adjusts the height of the adjusting block 11 relative to the supporting upright 12, so that the tightening assisting tool 100 drives the tightening shaft 200 to move up and down to adjust the tightening shaft 200 to a proper height, then, the operator rotates by holding the tightening shaft 200, so that the tightening shaft 200 drives the rotating assembly 20 to rotate relative to the adjusting assembly 10 through the connecting assembly 30, i.e. the tightening shaft 200 drives the mounting plate 32, the connecting plate 31, the rotating block 21 and the rotating shaft 22 which are connected in sequence to rotate, the rotating shaft 22 rotates relative to the adjusting block 11 to adjust the tightening head 201 to be aligned with the portion to be tightened, starts the tightening shaft 200, the tightening head 201 rotates relative to the tightening shaft 200 to perform the tightening operation, during the tightening process, the supporting upright 12 is connected to the external device, so that the tightening assisting tool 100 is always kept motionless relative to the external device, counteraction force generated by the tightening shaft 200 is offset, an operator can conveniently hold the tightening shaft 200, the operator is not hurt, operation safety is improved, stability of the tightening shaft 200 is improved, tightening quality is improved, the height and the angle of the tightening shaft 200 can be adjusted through the tightening auxiliary tool 100, alignment is accurate, and tightening quality is further improved.
In this embodiment, the number of the connecting plates 31 is two, the two connecting plates 31 are respectively connected to two sides of the rotating block 21, the mounting plate 32 is located above the two connecting plates 31, the mounting plate 32 is transversely disposed, each connecting plate 31 is bent to form a first bent portion 311, the first bent portion 311 is transversely disposed, and the first bent portion 311 is stacked at the bottom of the mounting plate 32. As shown in fig. 1, 3 and 4, two connecting plates 31 are respectively disposed on the left and right sides of the rotating block 21, the mounting plate 32 extends in the left and right directions, the first bent portion 311 is formed by bending the upper end of the connecting plate 31 in a direction away from the tightening shaft 200, the mounting plate 32 is stacked on the two first bent portions 311, the mounting plate 32 is connected to the first bent portion 311, the tightening shaft 200 is disposed between the two connecting plates 31 and penetrates through the mounting plate 32, and the first bent portion 311 plays a role in facilitating assembly and enhancing connection strength, thereby improving structural stability.
In the tightening auxiliary tool 100 of the present embodiment, each connecting plate 31 is bent to form a second bent portion 312, the second bent portion 312 is transversely disposed, the second bent portion 312 and the first bent portion 311 are disposed at an interval, the tightening auxiliary tool 100 further includes two adjusting handles 40, and the two adjusting handles 40 are respectively connected to the two second bent portions 312. As shown in fig. 1, 3 and 4, the second bent portion 312 is bent from the lower end of the connecting plate 31 to a direction away from the tightening shaft 200, the first bent portion 311 and the second bent portion 312 are vertically spaced, the adjusting handle 40 is connected below the second bent portion 312, when performing the rear overhang tightening operation of the vehicle, an operator holds the adjusting handle 40 to rotate, so that the adjusting handle 40 drives the tightening shaft 200 to rotate relative to the adjusting block 11 and the support column 12 through the connecting plate 31 and the mounting plate 32, so as to adjust the tightening head to be aligned with a portion to be tightened, thereby adjusting the angle of the tightening shaft 200, and further improving the tightening quality.
Further, a first rotating plate 313 is connected below the second bending part 312, and the adjusting handle 40 is detachably connected with the first rotating plate 313; the first rotating plate 313 is provided with a first waist-shaped hole 3131 extending vertically, the adjusting handle 40 is provided with a first mounting ear 41, a first mounting hole 411 is formed in a position, corresponding to the first waist-shaped hole 3131, of the first mounting ear 41, and the first waist-shaped hole 3131 is connected with the first mounting hole 411 through a fastener.
As shown in fig. 1 and 2, the position of the adjusting handle 40 relative to the first rotating plate 313 can be flexibly adjusted according to actual use requirements, when the adjustment is needed, the fastener is screwed to loosen the first mounting ear 41, and then the adjusting handle 40 is vertically moved along the first waist-shaped hole 3131 or the adjusting handle 40 is rotated relative to the first rotating plate 313 to adjust the adjusting handle 40 to a proper position. It will be appreciated that when the adjustment handle 40 is moved to a desired position relative to the first pivot plate 313, the fasteners are tightened in a reverse direction to tighten the first mounting ears 41 against the first pivot plate 313, such that the adjustment handle 40 is fixed relative to the first pivot plate 313, thereby completing the adjustment of the adjustment handle 40. In the preferred embodiment, the fastener can select the bolt in the prior art, has the installation of being convenient for, and convenient assembling is swift advantage.
In this embodiment, the connection assembly 30 further includes a first transition plate 33 and a second transition plate 34, the first transition plate 33 is vertically disposed, the second transition plate 34 is horizontally disposed, two ends of the first transition plate 33 are respectively connected with the two connection plates 31, the second transition plate 34 is connected with the first transition plate 33, the tightening auxiliary tool 100 further includes an operating handle 50, and the operating handle 50 is connected with the second transition plate 34. As shown in fig. 1 and 3, the second transition plate 34 is connected below the first transition plate 33, the first transition plate 33 is connected to the two connecting plates 31, the operating handle 50 is connected below the second transition plate 34, when the vehicle rear overhang tightening operation is performed, after the tightening shaft 200 is started, the tightening head 201 rotates relative to the tightening shaft 200 to perform the tightening operation, and during the tightening operation, the operator can further offset the reaction force of the tightening shaft 200 by holding the operating handle 50, thereby improving the stability of the tightening shaft 200.
Further, a second adapter plate 341 is connected below the second transition plate 34, and the operating handle 50 is detachably connected with the second adapter plate 341; the second adaptor plate 341 is provided with a second elongated hole 3411, the operating handle 50 is provided with a second mounting lug 51, a second mounting hole 511 is formed in a position, corresponding to the second elongated hole 3411, of the second mounting lug 51, and the second elongated hole 3411 is connected to the second mounting hole 511 through a fastener.
As shown in fig. 1 and fig. 3, the position of the operating handle 50 relative to the second adaptor plate 341 can be flexibly adjusted according to actual use requirements, when adjustment is needed, the fastener is screwed to loosen the second mounting ear 51, and then the operating handle 50 is vertically moved along the second kidney-shaped hole 3411 or the operating handle 50 is rotated relative to the second adaptor plate 341 to adjust the operating handle 50 to a proper position. It can be understood that, when the operating handle 50 is moved to a proper position relative to the second adaptor plate 341, the fastening member is tightened reversely to tightly press the second mounting lug 51 against the second adaptor plate 341, so that the operating handle 50 is fixed relative to the second adaptor plate 341, and the adjustment of the operating handle 50 is completed. In the preferred embodiment, the fastener can select the bolt in the prior art, has the installation of being convenient for, and convenient assembling is swift advantage.
In this embodiment, the connecting assembly 30 further includes a reinforcing plate 35, the reinforcing plate 35 is transversely disposed, and the reinforcing plate 35 is stacked on the bottom of the mounting plate 32. As shown in fig. 1, the mounting plate 32 is stacked on the reinforcing plate 35, the reinforcing plate 35 is located between the two first bent portions 311, the tightening shaft 200 is located between the two connecting plates 31 and passes through the reinforcing plate 35 and the mounting plate 32, the tightening head 201 is located on the side of the mounting plate 32 away from the reinforcing plate 35, and the reinforcing plate 35 serves to reinforce the connection strength, thereby further improving the structural stability.
In this embodiment, the rotating assembly 20 further includes two thrust bearings 23, the two thrust bearings 23 are sleeved outside the rotating shaft 22, and the two thrust bearings 23 are respectively abutted against two sides of the rotating block 21. As shown in fig. 4, two thrust bearings 23 are sleeved on the rotating shaft 22, the two thrust bearings 23 are respectively arranged on two sides of the rotating block 21 and are abutted against the rotating block 21, the thrust bearings 23 can be thrust roller bearings or thrust needle roller bearings in the prior art, the thrust bearings 23 have good axial load bearing capacity, axial movement of the rotating shaft 22 is effectively prevented, and the structure is reasonable in design, stable and reliable.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents of the technical solutions of the present invention, which are made by using the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. The tightening auxiliary tool is characterized by being used for assisting a tightening shaft to perform tightening operation, wherein one end of the tightening shaft is provided with a tightening head; screw up auxiliary fixtures includes:
the adjusting assembly comprises an adjusting block and a supporting upright which is vertically arranged, the adjusting block is slidably sleeved outside the supporting upright, and the supporting upright is used for being connected with external equipment;
the rotating assembly comprises a rotating block and a rotating shaft which is transversely arranged, the rotating shaft is rotatably connected with the adjusting block, and the rotating block is sleeved outside the rotating shaft and is arranged at an interval with the adjusting block;
coupling assembling, coupling assembling includes connecting plate and mounting panel, the connecting plate connect in the turning block with between the mounting panel, the mounting panel with screw up the hub connection, screw up the vertical passing of axle the mounting panel, just the tightening head is located the top of mounting panel.
2. The tightening auxiliary tool according to claim 1, wherein the number of the connecting plates is two, the two connecting plates are respectively connected to two sides of the rotating block, the mounting plate is located above the two connecting plates, the mounting plate is transversely arranged, each connecting plate is bent to form a first bent portion, the first bent portion is transversely arranged, and the first bent portion is overlapped at the bottom of the mounting plate.
3. The tightening auxiliary tool according to claim 2, wherein each connecting plate is bent to form a second bent portion, the second bent portion is transversely disposed, the second bent portion is spaced apart from the first bent portion, and the tightening auxiliary tool further includes two adjusting handles, and the two adjusting handles are respectively connected to the two second bent portions.
4. The tightening auxiliary tool according to claim 3, wherein a first rotating plate is connected below the second bending portion, and the adjusting handle is detachably connected with the first rotating plate.
5. The tightening auxiliary tool according to claim 4, wherein the first adapter plate is provided with a first waist-shaped hole extending vertically, the adjusting handle is provided with a first mounting lug, a first mounting hole is formed in the first mounting lug at a position corresponding to the first waist-shaped hole, and the first waist-shaped hole is connected with the first mounting hole through a fastener.
6. The tightening auxiliary tool according to claim 2, wherein the connecting assembly further comprises a first transition plate and a second transition plate, the first transition plate is vertically arranged, the second transition plate is transversely arranged, two ends of the first transition plate are correspondingly connected with the two connecting plates respectively, the second transition plate is connected with the first transition plate, and the tightening auxiliary tool further comprises an operating handle which is connected with the second transition plate.
7. The tightening auxiliary tool according to claim 6, wherein a second adapter plate is connected to the lower portion of the second transition plate, and the operating handle is detachably connected to the second adapter plate.
8. The tightening auxiliary tool according to claim 7, wherein a second elongated hole is formed in the second adapter plate, the second elongated hole extends vertically, a second mounting lug is arranged on the operating handle, a second mounting hole is formed in a position, corresponding to the second elongated hole, of the second mounting lug, and the second elongated hole is connected with the second mounting hole through a fastener.
9. The tightening auxiliary tool according to any one of claims 2 to 8, wherein the connecting assembly further comprises a reinforcing plate, the reinforcing plate is transversely arranged, and the reinforcing plate is stacked on the bottom of the mounting plate.
10. The tightening auxiliary tool according to any one of claims 1 to 8, wherein the rotating assembly further comprises two thrust bearings, the two thrust bearings are sleeved outside the rotating shaft, and the two thrust bearings are respectively abutted against two sides of the rotating block.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121395398.5U CN215789607U (en) | 2021-06-22 | 2021-06-22 | Screw up auxiliary fixtures |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121395398.5U CN215789607U (en) | 2021-06-22 | 2021-06-22 | Screw up auxiliary fixtures |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215789607U true CN215789607U (en) | 2022-02-11 |
Family
ID=80178040
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121395398.5U Active CN215789607U (en) | 2021-06-22 | 2021-06-22 | Screw up auxiliary fixtures |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215789607U (en) |
-
2021
- 2021-06-22 CN CN202121395398.5U patent/CN215789607U/en active Active
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