CN220094169U - Self-adaptive grinding device for outer circular surface of lathe - Google Patents
Self-adaptive grinding device for outer circular surface of lathe Download PDFInfo
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- CN220094169U CN220094169U CN202321545727.9U CN202321545727U CN220094169U CN 220094169 U CN220094169 U CN 220094169U CN 202321545727 U CN202321545727 U CN 202321545727U CN 220094169 U CN220094169 U CN 220094169U
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- 230000007246 mechanism Effects 0.000 claims abstract description 34
- 230000003044 adaptive effect Effects 0.000 claims abstract description 10
- 230000000694 effects Effects 0.000 claims description 10
- 238000009434 installation Methods 0.000 claims description 5
- 235000019580 granularity Nutrition 0.000 claims description 4
- 238000004512 die casting Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 239000011347 resin Substances 0.000 claims description 3
- 229920005989 resin Polymers 0.000 claims description 3
- 238000012545 processing Methods 0.000 abstract description 11
- 238000005498 polishing Methods 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 238000003754 machining Methods 0.000 description 5
- 230000003746 surface roughness Effects 0.000 description 5
- 238000007514 turning Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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Abstract
The utility model provides an outer circular surface self-adaptive grinding device for a lathe, which comprises: a grinding wheel mechanism and a self-adapting mechanism; the grinding wheel mechanism includes: grinding wheel, wheel axle and supporting frame; the grinding wheel and the wheel shaft are assembled and then mounted on the supporting frame; the adaptive mechanism includes: the device comprises a sleeve, a pull rod, a spring, a stop nut, an elastic force adjusting nut, a jacket and a guide key; one end of the pull rod is positioned by a T-shaped table and a sleeve spring mounting flange, the other end of the pull rod is provided with an external thread for an elastic force adjusting nut, the spring penetrates through the pull rod, one end of the pull rod is fixed on the sleeve spring mounting flange, and the elastic force is adjusted by adjusting the locking position of the elastic force adjusting nut on the pull rod; the outer frame of the section of the outer sleeve is a square with 4 chamfer angles, the inner frame is round, and the guiding and stopping between the sleeve and the outer sleeve are realized through the guiding key; the problem that the outer surface grinding and polishing of the cylindrical part with multiple conicity or sphere needs to be carried out on numerical control lathe equipment and the time cost of a processing table is high is effectively solved.
Description
Technical Field
The utility model relates to the technical field of grinding equipment, in particular to a self-adaptive grinding device for grinding an outer circular surface of a lathe.
Background
The processing of the outer circular surface of the traditional cylindrical part is finished on a horizontal lathe, along with the technical progress, the appearance of the part is changed from the multi-diameter outer circular surface of the previous step type to taper transition, and in order to meet specific functional requirements, certain cylindrical parts are designed into spherical or conical cylindrical surfaces, and the quality requirement on surface roughness is high. Along with the development of numerical control technology, the use of numerical control equipment such as a numerical control lathe, a numerical control cylindrical grinder and the like meets the processing requirements of spherical or conical cylindrical surfaces to a certain extent. The parts generally need to be ground after numerical control turning to meet the surface roughness requirement, but compared with common lathes and cylindrical grinding machines, the numerical control lathes and numerical control grinding machines have high manufacturing cost and operation maintenance cost, so that the machining station time cost is high, particularly, the machining of workpieces with larger outer diameters is low in numerical control equipment capable of meeting the machining capability requirement, the queuing phenomenon of the equipment is serious, the machining cost is high, and the manufacturing cycle, the manufacturing cost and the like of the parts cannot meet the customer requirement.
In recent years, along with development and perfection of auxiliary equipment of a machine tool, in order to improve processing efficiency, shorten manufacturing period and reduce manufacturing cost, lathe auxiliary equipment such as a belt sander, a grinding and polishing wheel and the like is utilized to realize turning instead of grinding, a numerical control lathe is utilized to realize the processing function of a numerical control grinder, and after numerical control turning finish processing, a matched grinding and polishing head is utilized to carry out grinding and polishing processing on an outer circular surface so as to meet the surface roughness requirement.
At present, the surface of a spherical or conical cylindrical surface part is replaced by turning and grinding, the numerically controlled lathe still needs to be occupied, and the time cost of the numerically controlled lathe with a large rotation diameter is still higher, so that the machining and manufacturing cost is not reduced.
Disclosure of Invention
According to the technical problem, the outer circular surface self-adaptive grinding device for the lathe is provided, the common lathe is matched with the grinding device, so that the outer circular surface of the cylindrical part can be ground, particularly, the outer circular surface of the cylindrical part with single taper, double taper, multi-taper gradient or spherical shape can be ground through the self-adaptive capacity of the grinding device, namely, the common lathe is used for replacing a numerical control grinder or a numerical control lathe (with a common grinding head) to finish grinding the cylindrical part with taper or spherical shape, and the occupation of high-precision and high-time processing equipment such as the numerical control grinder or the numerical control lathe can be reduced while the roughness adjustment control of the outer circular surface of the part is realized, the time cost of a processing station is saved, and particularly, the saving effect on the large-diameter part is more remarkable.
The utility model adopts the following technical means:
an outer circular surface self-adaptive grinding device for a lathe, comprising:
a grinding wheel mechanism and a self-adapting mechanism;
the grinding wheel mechanism includes: grinding wheel, wheel axle, support frame and locking bolt;
the adaptive mechanism includes: the device comprises a sleeve, a pull rod, a spring, a stop nut, an elastic force adjusting nut, a jacket and a guide key;
one end of the sleeve is an angle adjusting flange, the other end of the sleeve is a spring mounting flange, and a guide key slot is machined on the middle outer circular surface of the sleeve; one end of the pull rod is positioned by a T-shaped table and a sleeve spring mounting flange, the other end of the pull rod is provided with an external thread for an elastic force adjusting nut, the spring penetrates through the pull rod, one end of the pull rod is fixed on the sleeve spring mounting flange, the other end of the pull rod is fixed by a stop nut, and the elastic force is adjusted by adjusting the locking position of the elastic force adjusting nut on the pull rod; the outer frame of the cross section of the outer sleeve is a square with 4 chamfer angles, the inner frame is round, one end of the inner frame is provided with an internal thread for a stop nut, the other end of the inner frame is provided with a mounting hole for mounting the sleeve, the outer end face of the outer frame is provided with a threaded hole for fixing a guide key, and the guide and stop between the sleeve and the outer sleeve are realized through the guide key;
the grinding wheel and the wheel shaft are assembled and then mounted on the support frame, and are connected with a sleeve end face angle adjusting flange in the self-adapting mechanism through a locking bolt;
the support frame is detachably and fixedly connected with a sleeve end face angle adjusting flange in the self-adaptive mechanism, and the angle between the central axis of the grinding wheel and the installation plane of the clamping base plate of the machine tool is adjusted to a proper angle and then is fixedly locked, so that the optimal grinding effect can be realized by adjusting the angle.
Further comprises: clamping a backing plate by a machine tool;
the machine tool clamping backing plate is required to be matched and designed according to the clamping requirement of the lathe tool table, and has the main functions of fixing two sets of grinding heads in an upper mirror image and a lower mirror image mode, and can be clamped with the lathe tool table conveniently so as to ensure the grinding effect;
the grinding wheel is formed by die casting grinding materials with different granularities and different types and resin, the assembly size and the height of the middle and the wheel shaft are fixed, and the outer diameter can be properly adjusted according to the part requirement; bearing mounting positions and external threads are machined at two ends of the wheel shaft and are provided with fixing nuts, and the external threads are used for bearing positioning and stopping and are fixedly connected with the supporting frame; the grinding wheel mechanism is connected with an angle adjusting flange of a sleeve end face in the self-adapting mechanism through a locking bolt, an included angle between the central axis of the grinding wheel and the installation plane of a clamping base plate of a machine tool is adjusted to a proper angle, then the grinding wheel mechanism is fixedly locked, and the optimal grinding effect is achieved through adjustment of the included angle.
The utility model adopting the technical scheme effectively solves the problem that the grinding and polishing of the outer surface of the cylindrical part with multiple conicity or sphere needs to be carried out on numerical control lathe equipment, and the time cost for processing is high, realizes the grinding of the outer surface of the cylindrical part with multiple conicity or sphere by an ordinary lathe, realizes the grinding of the outer surface of the part on the basis of not changing the appearance of the part by the self-adaption of a grinding head, controls and adjusts the roughness of the surface of the part, and saves the time cost for processing.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are some embodiments of the present utility model, and other drawings may be obtained according to the drawings without inventive effort to a person skilled in the art.
FIG. 1 is a schematic view of a grinding wheel mechanism according to the present utility model.
Fig. 2 is a schematic diagram of the adaptive mechanism of the present utility model.
Fig. 3 is an overall schematic of the present utility model.
In the figure: 1. a grinding wheel mechanism;
101. a grinding wheel; 102. a wheel axle; 103. a support frame; 104. a locking bolt;
2. an adaptive mechanism;
201. a sleeve; 202. a pull rod; 203. a spring; 204. a stop nut; 205. an elastic force adjusting nut; 206. a jacket; 207. a guide key;
3. and (5) installing and clamping the backing plate on the machine tool.
Detailed Description
It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other. The utility model will be described in detail below with reference to the drawings in connection with embodiments.
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the utility model, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present utility model. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present utility model unless it is specifically stated otherwise. Meanwhile, it should be clear that the dimensions of the respective parts shown in the drawings are not drawn in actual scale for convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.
In the description of the present utility model, it should be understood that the azimuth or positional relationships indicated by the azimuth terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal", and "top, bottom", etc., are generally based on the azimuth or positional relationships shown in the drawings, merely to facilitate description of the present utility model and simplify the description, and these azimuth terms do not indicate and imply that the apparatus or elements referred to must have a specific azimuth or be constructed and operated in a specific azimuth, and thus should not be construed as limiting the scope of protection of the present utility model: the orientation word "inner and outer" refers to inner and outer relative to the contour of the respective component itself.
Spatially relative terms, such as "above … …," "above … …," "upper surface at … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
In addition, the terms "first", "second", etc. are used to define the components, and are only for convenience of distinguishing the corresponding components, and the terms have no special meaning unless otherwise stated, and therefore should not be construed as limiting the scope of the present utility model.
As shown in fig. 1 to 3, the present utility model provides an outer circumferential surface adaptive grinding device for a lathe, comprising:
a grinding wheel mechanism 1 and an adaptive mechanism 2;
the grinding wheel mechanism 1 includes: grinding wheel 101, axle 102, support 103 and locking bolt 104;
the grinding wheel 101 and the wheel shaft 102 are rotatably assembled and then are mounted on the supporting frame 103, and are connected with a 201 sleeve end face angle adjusting flange in the self-adapting mechanism 2 through a locking bolt 104;
the adaptive mechanism 2 includes: sleeve 201, pull rod 202, spring 203, stop nut 204, spring force adjusting nut 205, outer sleeve 206 and guide key 207;
one end of the sleeve 201 is an angle adjusting flange, the other end of the sleeve 201 is a spring mounting flange, and a guide key groove is machined on the outer circular surface in the middle of the sleeve 201; one end of the pull rod 202 is positioned by a T-shaped table and a sleeve spring mounting flange, the other end of the pull rod 202 is provided with an external thread for an elastic force adjusting nut 205, a spring 203 penetrates through the pull rod 202, one end of the pull rod is fixed on the sleeve spring mounting flange, the other end of the pull rod is fixed by a stop nut 204, and the elastic force is adjusted by adjusting the locking position of the elastic force adjusting nut 205 on the pull rod 202; the outer frame of the cross section of the outer sleeve 206 is a square with 4 corner chamfers, the inner frame is round, one end is provided with an internal thread for the stop nut 204, the other end is provided with a mounting hole for mounting the sleeve 201, the outer end face is provided with a threaded hole for fixing the guide key 207, and the guide and stop between the sleeve 201 and the outer sleeve 206 are realized through the guide key 207;
the support frame 103 is detachably and fixedly connected with an angle adjusting flange of the end face of the sleeve 201 in the self-adapting mechanism 2, and the angle between the central axis of the grinding wheel and the installation plane of the clamping base plate of the machine tool is adjusted to a proper angle and then is fixedly locked, and the optimal grinding effect can be realized by adjusting the angle.
Further comprises: a machine tool clamping backing plate 3;
the machine tool clamping backing plate 3 is required to be matched and designed according to the clamping requirement of a lathe tool table, and has the main functions of fixing two sets of grinding heads in an upper mirror image and a lower mirror image mode, and can be clamped with the lathe tool table conveniently so as to ensure the grinding effect;
the grinding wheel 101 is formed by die casting grinding materials with different granularities and different types and resin, the assembly size and the height of the middle and wheel shafts 102 are fixed, and the outer diameter can be properly adjusted according to the part requirement; bearing mounting positions and external threads are machined at two ends of the wheel axle 102 and are provided with fixing nuts, and the external threads are used for bearing positioning and stopping and are fixedly connected with the support frame 103; the angle adjusting flange of the end face of the sleeve 201 in the grinding wheel mechanism 1 and the self-adapting mechanism 2 is connected through the locking bolt 104, the included angle between the central axis of the grinding wheel and the installation plane of the clamping backing plate 3 of the machine tool is adjusted to a proper angle, then the grinding wheel is fixedly locked, and the grinding effect is adjusted through the adjustment of the included angle.
The implementation steps and the method are as follows:
the self-adaptive grinding device for the outer circular surface of the common lathe designed by the embodiment has wide adaptability to grinding of the outer circular surface of the cylindrical part, and is particularly suitable for grinding the outer surface of the cylindrical part with multiple conicity or spherical surface. The present patent is described in further detail below with reference to the drawings and detailed description.
In a first embodiment of the present utility model,
the main parameters of this example are as follows:
1. part type: cylindrical roller type workpiece, the two sides of the roller surface are provided with double gradient taper.
2. Surface roughness requirements: ra1.6μm or less
3. Part outside diameter: phi 1300mm
4. Embodiments are described below: during operation, the grinding device is clamped and fixed on the lathe tool table through the machine tool clamping backing plate 3, and is aligned to enable a plane formed by the center lines of the upper grinding wheel and the lower grinding wheel to be parallel to the plane of the center line of the lathe, the outer diameter and granularity of the grinding wheel 101 are selected and determined according to the outer diameter size and the surface roughness requirement of the part, the grinding wheel is assembled with the wheel shaft 102 and then is mounted on the support frame 103, the included angle between the center lines of the upper grinding wheel 101 and the lower grinding wheel 101 and the machine tool clamping backing plate 3 is adjusted, namely, the included angle between the center lines of the upper grinding wheel 101 and the lower grinding wheel 101 is 30-45 degrees, the upper grinding wheel is ensured to be symmetrically arranged compared with the clamping backing plate, the upper grinding wheel can be adjusted according to the outer diameter of the part in the actual working process, and the locking bolt 104 and the end face angle adjusting flange of the sleeve 201 are locked and fixed after the adjustment. The center line of the upper and lower grinding wheels 101 is positioned on a vertical plane by matching the adjusting stop nut 204 and the elastic force adjusting nut 205, and the tension is equivalent in a free state. The grinding device is used for compressing the surface of the part by feeding the part by taking the contact between the outer surface of the part where the outer diameter is minimum and the outer surface of the grinding wheel 101 as a reference after the part is clamped and aligned on a lathe, the feeding amount is required to be within a relatively constant range of the spring force, but not less than 3 times of the maximum gradient value of the surface of the part, along with the rotation of the part, the grinding wheel 101 rotates in the opposite direction to the rotation of the part under the action of the friction force of the surface of the part, moves along the axis direction of the part along with the lathe tool table, and makes spiral line motion on the surface of the part, and in the motion process, the rotation of the grinding wheel 101 is driven by the friction force of the surface of the part, so that micro-area sliding occurs between the outer surface of the grinding wheel 101 and the surface of the part, and the surface of the part is realized. In the process that the outer diameter of the part changes along with the gradient, the grinding wheel automatically stretches and compensates under the action of the spring 203 in the self-adaptive mechanism 2, so that the pressing force of the grinding wheel on the surface of the part is unchanged, namely, the self-adaptation of the grinding wheel 101 to the outer surface of the part is realized, the uniform grinding effect is ensured, and the shape of the part is not changed during grinding. The grinding wheel 101 is driven by the lathe tool table to continuously reciprocate along the surface of the part until the surface grinding state of the part meets the requirement.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the utility model.
Claims (2)
1. An outer circular surface self-adaptive grinding device for a lathe is characterized by comprising:
a grinding wheel mechanism (1) and an adaptive mechanism (2);
the grinding wheel mechanism (1) comprises: grinding wheel (101), wheel axle (102), support (103) and locking bolt (104);
the adaptive mechanism (2) includes: a sleeve (201), a pull rod (202), a spring (203), a stop nut (204), an elastic force adjusting nut (205), a jacket (206) and a guide key (207);
one end of the sleeve (201) is an angle adjusting flange, the other end of the sleeve is a spring mounting flange, and a guide key groove is processed on the middle outer circular surface of the sleeve (201); one end of the pull rod (202) is positioned by a T-shaped table and a sleeve spring mounting flange, the other end of the pull rod is provided with an external thread for an elastic force adjusting nut (205), the spring (203) penetrates the pull rod (202), one end of the pull rod is fixed on the sleeve spring mounting flange, the other end of the pull rod is fixed by a stop nut (204), and the elastic force is adjusted by adjusting the locking position of the elastic force adjusting nut (205) on the pull rod (202); the outer frame of the cross section of the outer sleeve (206) is in a square shape with 4 corner chamfers, the inner frame is in a round shape, one end of the inner frame is provided with an internal thread for a stop nut (204), the other end of the inner frame is provided with a mounting hole for mounting the sleeve (201), the outer end face of the outer frame is provided with a threaded hole for fixing a guide key (207), and the guide and stop between the sleeve (201) and the outer sleeve (206) are realized through the guide key (207);
the grinding wheel (101) and the wheel shaft (102) are assembled and then are mounted on the supporting frame (103), and are connected with a sleeve end face angle adjusting flange in the self-adapting mechanism (2) through a locking bolt (104);
the support frame (103) is detachably and fixedly connected with an end face angle adjusting flange of a sleeve (201) in the self-adapting mechanism (2).
2. The adaptive grinding device for an outer circumferential surface for a lathe according to claim 1, further comprising: a machine tool clamping backing plate (3);
the machine tool clamping backing plate (3) is required to be matched and designed according to the clamping requirement of a lathe tool table, and has the main functions of fixing two sets of grinding heads in an upper mirror image and a lower mirror image mode, and can be clamped with the lathe tool table conveniently so as to ensure the grinding effect;
the grinding wheel (101) is formed by die casting grinding materials with different granularities and different types and resin, the assembly size and the height of the middle and the wheel shaft (102) are fixed, and the outer diameter can be properly adjusted according to the part requirement; bearing mounting positions, external threads and fixing nuts are machined at two ends of the wheel axle (102), and the external threads are used for bearing positioning and stopping and are fixedly connected with the supporting frame (103); the end face angle adjusting flange of the sleeve (201) in the grinding wheel mechanism (1) and the self-adapting mechanism (2) is connected through the locking bolt (104), the included angle between the central axis of the grinding wheel and the installation plane of the clamping backing plate (3) of the machine tool is adjusted to a proper angle and then is fixedly locked, and the grinding effect is adjusted through the adjustment of the included angle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321545727.9U CN220094169U (en) | 2023-06-16 | 2023-06-16 | Self-adaptive grinding device for outer circular surface of lathe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321545727.9U CN220094169U (en) | 2023-06-16 | 2023-06-16 | Self-adaptive grinding device for outer circular surface of lathe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220094169U true CN220094169U (en) | 2023-11-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321545727.9U Active CN220094169U (en) | 2023-06-16 | 2023-06-16 | Self-adaptive grinding device for outer circular surface of lathe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220094169U (en) |
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2023
- 2023-06-16 CN CN202321545727.9U patent/CN220094169U/en active Active
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