CN216371835U - Rotating shaft maintenance adjusting device - Google Patents
Rotating shaft maintenance adjusting device Download PDFInfo
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- CN216371835U CN216371835U CN202122719213.8U CN202122719213U CN216371835U CN 216371835 U CN216371835 U CN 216371835U CN 202122719213 U CN202122719213 U CN 202122719213U CN 216371835 U CN216371835 U CN 216371835U
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Abstract
The utility model discloses a rotating shaft maintenance adjusting device which comprises a device supporting seat, a fixed seat, a sliding seat, a first clamping wheel and a second clamping wheel, wherein the second clamping wheel is used for clamping a rotating shaft in a matching way with the first clamping wheel; the fixed seat is fixedly connected with the device supporting seat, and the sliding seat is connected with the device supporting seat in a sliding manner; the first clamping wheel is rotatably connected to the fixed seat, and the second clamping wheel is rotatably connected to the sliding seat; the device supporting seat is provided with a driving mechanism for driving the first clamping wheel to rotate, and the driving output end of the driving mechanism is connected with the first clamping wheel. This pivot maintenance adjusting device passes through actuating mechanism and drives first clamp wheel and second and press from both sides the wheel and rotate, and first clamp wheel and second press from both sides the wheel and then drive the pivot and rotate to the angle of convenient adjustment pivot has reduced the use of manpower, has improved operating efficiency and security.
Description
Technical Field
The utility model relates to the field of maintenance equipment, in particular to a rotating shaft maintenance adjusting device.
Background
Currently, when a mining crusher main shaft is maintained, the crusher main shaft is placed on a clamping device. When the angle of the main shaft of the crusher needs to be adjusted, the main shaft of the crusher is pried to rotate by two persons through a crowbar, after the main shaft of the crusher rotates for a certain angle, a fixing part is arranged between the main shaft of the crusher and the clamping device by one person, and if the required maintenance surface does not reach a proper angle, the main shaft of the crusher is pried and arranged again. Time and labor are consumed, and great potential safety hazards exist.
In view of the above, improvements are needed.
SUMMERY OF THE UTILITY MODEL
The technical scheme of the utility model aims to provide the rotating shaft maintenance adjusting device which is convenient to use and improves the operation efficiency and the safety.
The technical scheme of the utility model provides a rotating shaft maintenance adjusting device which comprises a device supporting seat, a fixed seat, a sliding seat, a first clamping wheel and a second clamping wheel, wherein the second clamping wheel is used for clamping a rotating shaft in a matching way with the first clamping wheel; the fixed seat is fixedly connected with the device supporting seat, and the sliding seat is connected with the device supporting seat in a sliding manner; the first clamping wheel is rotatably connected to the fixed seat, and the second clamping wheel is rotatably connected to the sliding seat; the device supporting seat is provided with a driving mechanism for driving the first clamping wheel to rotate, and the driving output end of the driving mechanism is connected with the first clamping wheel.
Furthermore, a brake capable of contacting with the first pinch roller is arranged on the fixed seat.
Furthermore, the device supporting seat comprises a supporting base, a supporting platform and a telescopic piece, and the fixed seat and the sliding seat are connected to the supporting platform; the supporting platform is positioned above the supporting base, and the telescopic piece is connected between the supporting base and the supporting platform; the extensible member include with the first spliced pole that load-bearing platform is connected and with the second spliced pole that the support base is connected, first spliced pole with second spliced pole sliding connection.
Further, a reinforcing plate is connected between the second connecting column and the supporting base.
Furthermore, a hydraulic telescopic cylinder is connected between the supporting platform and the supporting base.
Further, the driving mechanism comprises a driving wheel, a driven wheel and a transmission chain; the driving wheel is rotatably connected to the first connecting column, the driven wheel is connected with the first clamping wheel, one end of the transmission chain is sleeved on the driving wheel, and the other end of the transmission chain is sleeved on the driven wheel.
Further, actuating mechanism still includes driving motor, driving motor connects on the first spliced pole, driving motor's motor shaft with the action wheel is connected.
Furthermore, the rotating shaft maintenance adjusting device comprises an adjusting mechanism for adjusting the sliding of the sliding seat, and an adjusting output end of the adjusting mechanism is connected with the sliding seat.
Furthermore, the adjusting mechanism comprises an adjusting motor, a first driving wheel, a second driving wheel, a driving belt and a lead screw in threaded connection with the sliding seat; the first driving wheel is connected with the adjusting motor, the second driving wheel is connected with the screw rod, one end of the driving belt is sleeved on the first driving wheel, and the other end of the driving belt is sleeved on the second driving wheel.
Furthermore, two telescopic pieces which are arranged at intervals are connected between the supporting platform and the supporting base; two be connected with the mounting panel between the first spliced pole, adjusting motor installs on the mounting panel.
By adopting the technical scheme, the method has the following beneficial effects:
the utility model discloses a rotating shaft maintenance adjusting device which comprises a device supporting seat, a fixed seat, a sliding seat, a first clamping wheel and a second clamping wheel, wherein the second clamping wheel is used for clamping a rotating shaft in a matching manner with the first clamping wheel. The fixed seat is fixedly connected with the device supporting seat, and the sliding seat is slidably connected with the device supporting seat. The first clamping wheel is rotatably connected to the fixed seat, and the second clamping wheel is rotatably connected to the sliding seat. The device supporting seat is provided with a driving mechanism for driving the first clamping wheel to rotate, and the driving output end of the driving mechanism is connected with the first clamping wheel. The driving mechanism in the rotating shaft maintenance adjusting device drives the first clamping wheel and the second clamping wheel to rotate, and the rotating shaft is driven to rotate after the first clamping wheel and the second clamping wheel rotate, so that the angle of the rotating shaft is adjusted rapidly, and the maintenance of workers is facilitated. The use of manpower has been reduced to the angle of adjustment in-process, has improved efficiency, and the pivot only needs to do axial rotation moreover, and is safer.
Drawings
FIG. 1 is a schematic view of a spindle maintenance adjustment apparatus according to an embodiment of the present invention;
FIG. 2 is a schematic view of a device support base and a driving mechanism according to an embodiment of the present invention;
FIG. 3 is a schematic view of a device support base according to an embodiment of the present invention;
FIG. 4 is a schematic view of an adjustment mechanism according to an embodiment of the utility model.
Detailed Description
The following further describes embodiments of the present invention with reference to the accompanying drawings.
It is easily understood that according to the technical solution of the present invention, those skilled in the art can substitute various structures and implementation manners without changing the spirit of the present invention. Therefore, the following detailed description and the accompanying drawings are only exemplary illustrations of the technical solutions of the present invention, and should not be construed as being all of the present invention or as defining or limiting the technical solutions of the present invention.
The terms of orientation of up, down, left, right, front, back, top, bottom, and the like referred to or may be referred to in this specification are defined relative to the configuration shown in the drawings, and are relative terms, and thus may be changed correspondingly according to the position and the use state of the device. Therefore, these and other directional terms should not be construed as limiting terms.
As shown in fig. 1-2, a rotating shaft maintenance adjusting device 10 according to an embodiment of the present invention includes a device supporting seat 1, a fixed seat 2, a sliding seat 3, a first clamping wheel 4, and a second clamping wheel 5 for clamping a rotating shaft in cooperation with the first clamping wheel 4.
The fixed seat 2 is fixedly connected with the device supporting seat 1, and the sliding seat 3 is slidably connected with the device supporting seat 1.
The first clamping wheel 4 is rotatably connected to the fixed seat 2, and the second clamping wheel 5 is rotatably connected to the sliding seat 3.
The device supporting seat 1 is provided with a driving mechanism 6 for driving the first clamping wheel 4 to rotate, and the driving output end of the driving mechanism 6 is connected with the first clamping wheel 4.
The spindle servicing adjustment apparatus 10 is primarily intended to facilitate servicing of a spindle, such as a mining crusher spindle. The rotating shaft maintenance adjusting device 10 comprises a device supporting seat 1, a fixed seat 2, a sliding seat 3, a first clamping wheel 4 and a second clamping wheel 5.
The device supporting seat 1 is placed on the ground and plays a supporting role. The fixed seat 2 and the sliding seat 3 are arranged on the upper surface of the device supporting seat 1 at intervals, wherein the fixed seat 2 is fixedly connected with the device supporting seat 1, and the sliding seat 3 is slidably connected with the device supporting seat 1. That is, the sliding seat 3 can slide on the device support base 1 in directions toward and away from the fixed seat 2.
Optionally, a sliding groove or a sliding rail is arranged on the device supporting seat 1, and the sliding seat 3 is connected with the sliding groove or the sliding rail.
The first clamping wheel 4 is rotatably connected to the fixed seat 2, and the second clamping wheel 5 is rotatably connected to the sliding seat 3. The first clamping wheel 4 and the second clamping wheel 5 form a clamping mechanism for clamping the rotating shaft, and a clamping space is formed between the first clamping wheel 4 and the second clamping wheel 5.
Alternatively, the first pinch roller 4 is rotatably connected to the fixed base 2 by a first connecting shaft, and the second pinch roller 5 is rotatably connected to the sliding base 3 by a second connecting shaft.
The device supporting seat 1 is provided with a driving mechanism 6, the driving mechanism 6 is provided with a driving output end capable of driving the first clamping wheel 4 to rotate, and the driving output end is connected with the first clamping wheel 4.
When the rotating shaft maintenance adjusting device 10 is used, a rotating shaft to be maintained is placed between the first clamping wheel 4 and the second clamping wheel 5, and then the second clamping wheel 5 moves towards the direction close to the first clamping wheel 4, so that the second clamping wheel 5 and the first clamping wheel 4 are matched to clamp the rotating shaft. When the angle of the rotating shaft needs to be adjusted, the driving mechanism 6 is operated to enable the first clamping wheel 4 to rotate, and the rotating shaft is driven to rotate after the first clamping wheel 4 rotates. Therefore, the rotating shaft is convenient for workers to maintain.
The pivot maintenance adjusting device 10 that so sets up has changed and has used the mode that the crowbar perk pivot then rotated the pivot in the past, presss from both sides the wheel through first 4 and the second 5 angle that drive the pivot rotation and can adjust the pivot more easily, has reduced the use of manpower, and is safer high-efficient moreover. Wherein, through the slip second pinch roller 5, can adjust the distance between first pinch roller 4 and the second pinch roller 5 to be suitable for the not pivot of equidimension of centre gripping, more facilitate the use.
Alternatively, the driving mechanism 6 is a rocker or a turntable, so that the first pinch roller 4 can be manually operated to rotate, and the rotating angle of the first pinch roller 4 can be controlled more easily. Of course, the driving mechanism 6 may be other mechanisms as long as it can drive the first clamping roller 4 to rotate.
Optionally, the rotating shaft maintenance adjusting device 10 includes two device supporting seats 1, and the two device supporting seats 1 are arranged at an interval. Each device supporting seat 1 is provided with a clamping mechanism, and each clamping mechanism consists of a first clamping wheel 4 and a second clamping wheel 5. One end of the rotating shaft is clamped by one clamping mechanism, and the other end of the rotating shaft is clamped by the other clamping mechanism.
In one embodiment, as shown in fig. 1-2, the fixed seat 2 is provided with a brake 7 capable of contacting with the first pinch roller 4.
The rotating shaft maintenance adjusting device 10 further includes a brake 7, and the brake 7 is a device having a function of decelerating, stopping, or maintaining a stopped state of a moving member, and is commonly referred to as a brake or a brake. The brake 7 mainly comprises a brake frame, a brake part, an operating device and the like. Wherein, the brake frame is installed on fixing base 2, and operating means connects on the brake frame, and the arresting member is connected on operating means. When the first pinch roller 4 needs to be braked, the braking part is driven by the operating device to move towards the direction close to the first pinch roller 4 and contact with the first pinch roller 4. Friction is generated between the first pinch roller 4 and the brake member so that the first pinch roller 4 is decelerated or stationary.
In one embodiment, as shown in fig. 1-3, the device supporting base 1 includes a supporting base 11, a supporting platform 12 and a telescopic member 13, and the fixed base 2 and the sliding base 3 are connected to the supporting platform 12. The support platform 12 is located above the support base 11, and the telescopic member 13 is connected between the support base 11 and the support platform 12. The telescopic member 13 comprises a first connecting column 131 connected with the supporting platform 12 and a second connecting column 132 connected with the supporting base 11, and the first connecting column 131 is slidably connected with the second connecting column 132.
Specifically, the device supporting seat 1 is composed of a supporting base 11, a supporting platform 12 and an expansion piece 13, wherein the supporting base 11 is located below the supporting platform 12, and the expansion piece 13 is connected between the supporting platform 12 and the supporting base 11. The telescopic member 13 includes a first connecting column 131 and a second connecting column 132, wherein the first connecting column 131 is connected to the supporting platform 12, the second connecting column 132 is connected to the supporting base 11, and the first connecting column 131 is slidably connected to the second connecting column 132. The length of the telescopic piece 13 can be adjusted by sliding the first connecting column 131, so that the height of the supporting platform 12 is adjusted, and the use is convenient.
Alternatively, the first connecting column 131 has a connecting groove opened toward the second connecting column 132, and the second connecting column 132 is inserted into the connecting groove to be loosely fitted with the connecting groove, thereby allowing relative sliding between the first connecting column and the second connecting column 132. Be provided with the first connecting hole with the connecting groove intercommunication on first spliced pole 131, be provided with a plurality of second connecting holes at the interval on second spliced pole 132, first connecting hole passes through the bolt and selectively is connected with one of them second connecting hole, so make first spliced pole 131 and second spliced pole 132 relatively fixed.
The fixed seat 2 is fixed on the supporting platform 12, and the sliding seat 3 is connected on the supporting platform 12 in a sliding way. Optionally, a T-shaped sliding groove is formed in the supporting platform 12, a sliding block matched with the sliding groove in shape is connected to the bottom of the sliding seat 3, and the sliding block is in clearance fit with the sliding groove. So set up, make sliding seat 3 can smooth and steady slip.
In one embodiment, as shown in fig. 1-3, a reinforcing plate 111 is connected between the second connecting column 132 and the supporting base 11. One end of the reinforcing plate 111 is connected to the second connecting column 132, and the other end is connected to the supporting base 11, so that the second connecting column 132 is more firmly connected to the supporting base 11, and the supporting base 11 more firmly supports the second connecting column 132.
Optionally, a plurality of reinforcing plates 111 are connected between the supporting base 11 and the second connecting column 132, and the plurality of reinforcing plates 111 surround the second connecting column 132.
In one embodiment, as shown in fig. 1-3, a hydraulic telescopic cylinder 14 is connected between the support platform 12 and the support base 11.
Specifically, the rotating shaft maintenance adjusting device 10 further includes a hydraulic telescopic cylinder 14, and the hydraulic telescopic cylinder 14 is connected between the supporting platform 12 and the supporting base 11 and is located on one side of the telescopic member 13. The hydraulic telescopic cylinder 14 includes a telescopic piston rod and a hydraulic cylinder, and the telescopic piston rod is inserted into the hydraulic cylinder and is slidably connected with the hydraulic cylinder. The support platform 12 is driven to move up and down by the extension and retraction of the telescopic piston rod. So set up, conveniently adjust supporting platform 12's height, reduce staff's fatigue. The hydraulic telescopic cylinder 14 is hydraulically driven and can bear larger weight.
In one embodiment, as shown in fig. 1-2, the driving mechanism 6 includes a driving pulley 61, a driven pulley 62, and a transmission chain 63. The driving wheel 61 is rotatably connected to the first connecting column 131, the driven wheel 62 is connected to the first clamping wheel 4, one end of the transmission chain 63 is sleeved on the driving wheel 61, and the other end of the transmission chain is sleeved on the driven wheel 62.
Specifically, the driving wheel 61 is connected to the first connecting column 131 through a driving shaft, the driven wheel 62 is connected to the first connecting shaft of the first clamping wheel 4, and the driven wheel 62 is a driving output end of the driving mechanism 6. When the driving wheel 61 rotates, the driving wheel 61 drives the driven wheel 62 to rotate through the transmission chain 63, and the driven wheel 62 drives the first clamping wheel 4 to rotate through the first connecting shaft. The driving mechanism 6 arranged like this has simple structure and good transmission effect.
Alternatively, the driving pulley 61 and the driven pulley 62 are both ratchet wheels.
In one embodiment, as shown in fig. 1-2, the driving mechanism 6 further includes a driving motor 64, the driving motor 64 is connected to the first connecting column 131, and a motor shaft of the driving motor 64 is connected to the driving wheel 61. The driving wheel 61 is driven to rotate automatically by the driving motor 64, so that the labor is saved, and the automation is improved.
In one embodiment, as shown in fig. 1 and 4, the rotating shaft maintenance adjusting device 10 includes an adjusting mechanism 8 for adjusting the sliding of the sliding seat 3, and an adjusting output end of the adjusting mechanism 8 is connected with the sliding seat 3. The sliding seat 3 is driven to move through the adjusting mechanism 8, so that the sliding seat 3 is convenient for workers to move, and the operation is easy.
Optionally, the adjusting mechanism 8 is a hydraulic cylinder, which includes a cylinder sleeve and a connecting piston, the connecting piston is slidably connected with the cylinder sleeve, and the connecting piston is an adjusting output end of the adjusting mechanism 8. The sliding seat 3 is driven to slide by the extension of the connecting piston. Of course, the adjusting mechanism 8 may have other structures as long as it can drive the sliding seat 3 to slide.
In one embodiment, as shown in fig. 1 and 4, the adjusting mechanism 8 includes an adjusting motor 81, a first driving wheel 82, a second driving wheel 83, a driving belt 84, and a lead screw 85 in threaded connection with the sliding seat 3. The first driving wheel 82 is connected with the adjusting motor 81, the second driving wheel 83 is connected with the screw rod 85, one end of the driving belt 84 is sleeved on the first driving wheel 82, and the other end is sleeved on the second driving wheel 83.
Specifically, a threaded hole is formed in the sliding seat 3, and the lead screw 85 is in threaded connection with the threaded hole. The first driving wheel 82 is sleeved on a motor rotating shaft of the adjusting motor 81, the second driving wheel 83 is sleeved on the screw rod 85, one end of the driving belt 84 is sleeved on the first driving wheel 82, and the other end of the driving belt is sleeved on the second driving wheel 83. When the adjusting motor 81 is started, the motor shaft drives the first driving wheel 82 to rotate, the first driving wheel 82 drives the second driving wheel 83 to rotate through the driving belt 84, then the second driving wheel 83 drives the screw rod to rotate, and the screw rod 85 drives the sliding seat 3 to move. The screw 85 can rotate forward and backward by the forward and backward rotation of the motor rotating shaft, so as to drive the sliding seat 3 to slide towards the direction close to and far away from the fixed seat 2. So set up, can drive 3 slides of sliding seat automatically, the tired degree when reducing the staff operation, and the removal sliding seat 3 that can be faster moreover improves the operating efficiency.
In one embodiment, as shown in fig. 1 and 3-4, two telescoping members 13 are connected between the support platform 12 and the support base 11. The mounting plate 15 is connected between the two first connecting columns 131, and the adjusting motor 81 is mounted on the mounting plate 15.
Specifically, the rotating shaft maintenance adjusting device 10 includes two telescopic members 13, and the two telescopic members 13 are disposed at an interval. This provides a more secure support for the support platform 12. The mounting plate 15 is coupled between the two first coupling posts 131 so as to be movable up and down with the first coupling posts 131. The adjustment motor 81 is connected to the mounting plate 15, a platform opening is provided on the support platform 12, one end of the transmission belt 84 is sleeved on the first transmission wheel 82, and the other end thereof passes through the platform opening and is sleeved on the second transmission wheel 83. So set up, adjusting motor 81's installation layout is more reasonable to adjusting motor 81 is located between two first spliced poles 131, is protected by first spliced pole 131, and is difficult for impaired.
In summary, the present invention discloses a rotating shaft maintenance adjusting device 10, which includes a device supporting seat 1, a fixed seat 2, a sliding seat 3, a first clamping wheel 4 and a second clamping wheel 5 for clamping the rotating shaft in cooperation with the first clamping wheel 4. The fixed seat 2 is fixedly connected with the device supporting seat 1, and the sliding seat 3 is slidably connected with the device supporting seat 1. The first clamping wheel 4 is rotatably connected to the fixed seat 2, and the second clamping wheel 5 is rotatably connected to the sliding seat 3. The device supporting seat 1 is provided with a driving mechanism 6 for driving the first clamping wheel 4 to rotate, and the driving output end of the driving mechanism 6 is connected with the first clamping wheel 4. The rotating shaft maintenance adjusting device 10 is convenient for workers to adjust the angle of the rotating shaft more quickly and conveniently, changes the mode of using a crowbar to stir the rotating shaft in the past, reduces the fatigue of the workers, and also improves the safety in maintenance work.
According to the needs, the above technical schemes can be combined to achieve the best technical effect.
The foregoing is considered as illustrative only of the principles and preferred embodiments of the utility model. It should be noted that, for those skilled in the art, several other modifications can be made on the basis of the principle of the present invention, and the protection scope of the present invention should be regarded.
Claims (10)
1. A rotating shaft maintenance adjusting device is characterized by comprising a device supporting seat, a fixed seat, a sliding seat, a first clamping wheel and a second clamping wheel, wherein the second clamping wheel is used for clamping a rotating shaft in a matching way with the first clamping wheel;
the fixed seat is fixedly connected with the device supporting seat, and the sliding seat is connected with the device supporting seat in a sliding manner;
the first clamping wheel is rotatably connected to the fixed seat, and the second clamping wheel is rotatably connected to the sliding seat;
the device supporting seat is provided with a driving mechanism for driving the first clamping wheel to rotate, and the driving output end of the driving mechanism is connected with the first clamping wheel.
2. The rotating shaft maintenance adjusting device as claimed in claim 1, wherein a brake capable of contacting with the first pinch roller is disposed on the fixing seat.
3. The spindle maintenance adjustment device according to claim 1, wherein the device support base includes a support base, a support platform, and a telescopic member, the fixed base and the sliding base being connected to the support platform;
the supporting platform is positioned above the supporting base, and the telescopic piece is connected between the supporting base and the supporting platform;
the extensible member include with the first spliced pole that supporting platform connects and with support the second spliced pole that the base is connected, first spliced pole with second spliced pole sliding connection.
4. The spindle repair adjustment device according to claim 3, wherein a reinforcing plate is connected between the second connection column and the support base.
5. The spindle repair adjustment device according to claim 3, wherein a hydraulic telescopic cylinder is connected between the support platform and the support base.
6. The spindle maintenance adjustment device of claim 3, wherein the drive mechanism includes a drive wheel, a driven wheel, and a drive chain;
the driving wheel is rotatably connected to the first connecting column, the driven wheel is connected with the first clamping wheel, one end of the transmission chain is sleeved on the driving wheel, and the other end of the transmission chain is sleeved on the driven wheel.
7. The spindle maintenance adjustment device according to claim 6, wherein the driving mechanism further comprises a driving motor, the driving motor is connected to the first connecting column, and a motor shaft of the driving motor is connected to the driving wheel.
8. The spindle maintenance adjustment device according to claim 3, wherein the spindle maintenance adjustment device comprises an adjustment mechanism for adjusting the sliding of the sliding seat, and an adjustment output end of the adjustment mechanism is connected with the sliding seat.
9. The spindle maintenance adjustment device of claim 8, wherein the adjustment mechanism comprises an adjustment motor, a first transmission wheel, a second transmission wheel, a transmission belt, and a lead screw in threaded connection with the sliding seat;
the first driving wheel is connected with the adjusting motor, the second driving wheel is connected with the screw rod, one end of the driving belt is sleeved on the first driving wheel, and the other end of the driving belt is sleeved on the second driving wheel.
10. The spindle maintenance adjustment device according to claim 9, wherein two of the telescopic members are connected between the support platform and the support base;
two be connected with the mounting panel between the first spliced pole, adjusting motor installs on the mounting panel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122719213.8U CN216371835U (en) | 2021-11-08 | 2021-11-08 | Rotating shaft maintenance adjusting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122719213.8U CN216371835U (en) | 2021-11-08 | 2021-11-08 | Rotating shaft maintenance adjusting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216371835U true CN216371835U (en) | 2022-04-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122719213.8U Active CN216371835U (en) | 2021-11-08 | 2021-11-08 | Rotating shaft maintenance adjusting device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216371835U (en) |
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2021
- 2021-11-08 CN CN202122719213.8U patent/CN216371835U/en active Active
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