CN222199706U - Auxiliary fixture for machine tool bed processing - Google Patents
Auxiliary fixture for machine tool bed processing Download PDFInfo
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- CN222199706U CN222199706U CN202421016639.4U CN202421016639U CN222199706U CN 222199706 U CN222199706 U CN 222199706U CN 202421016639 U CN202421016639 U CN 202421016639U CN 222199706 U CN222199706 U CN 222199706U
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- 230000007246 mechanism Effects 0.000 claims abstract description 108
- 238000003825 pressing Methods 0.000 claims description 54
- 238000003754 machining Methods 0.000 claims description 21
- 230000000149 penetrating effect Effects 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 238000003801 milling Methods 0.000 abstract description 4
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000006835 compression Effects 0.000 description 14
- 238000007906 compression Methods 0.000 description 14
- 230000001360 synchronised effect Effects 0.000 description 8
- 238000005266 casting Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000000227 grinding Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
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Abstract
本实用新型涉及一种机床床身加工用辅助夹具，属于机床床身生产技术领域。包括安装在工作台上表面的门型架和用于压紧固定机床床身侧边的压紧机构，所述门型架的横梁上安装有升降驱动机构，所述升降驱动机构的伸缩端安装有为压紧机构的滑动导向的滑架，所述滑架水平设置，并由升降驱动机构驱动升降，所述滑架上安装有驱动压紧机构相对于滑架滑动的伸缩往复驱动机构。本实用新型具有以下有益效果：先利用伸缩往复驱动机构控制滑架的一端靠近机床床身，再利用升降驱动机构控制压紧机构带动滑架下降，所述滑架的端部压接在机床床身的底座上，即可将机床床身有效的固定在工作台的上表面，配合磨床、铣床，进行打磨导轨安装面，提高设备的紧压效率。
The utility model relates to an auxiliary clamp for machine tool bed processing, which belongs to the technical field of machine tool bed production. It includes a portal frame installed on the upper surface of a workbench and a clamping mechanism for clamping and fixing the side of the machine tool bed, a lifting drive mechanism is installed on the crossbeam of the portal frame, and a slide for sliding guide of the clamping mechanism is installed on the telescopic end of the lifting drive mechanism, the slide is horizontally arranged and driven to lift by the lifting drive mechanism, and a telescopic reciprocating drive mechanism for driving the clamping mechanism to slide relative to the slide is installed on the slide. The utility model has the following beneficial effects: first, one end of the slide is controlled to approach the machine tool bed by the telescopic reciprocating drive mechanism, and then the lifting drive mechanism is used to control the clamping mechanism to drive the slide to descend. The end of the slide is pressed on the base of the machine tool bed, so that the machine tool bed can be effectively fixed on the upper surface of the workbench, and the guide rail mounting surface can be polished in cooperation with a grinder and a milling machine, thereby improving the clamping efficiency of the equipment.
Description
Technical Field
The utility model relates to an auxiliary clamp for machining a machine tool body, and belongs to the technical field of machine tool body production.
Background
At present, most of machine tool bodies on the market are made of integral casting materials, and the integral casting materials are cast by casting molten metal into a mould which is manufactured in advance during manufacturing, wherein the casting materials are cast iron or cast aluminum alloy.
Through searching, the patent with the patent number of CN202010004918.9 discloses a workbench base of a numerical control machine tool. Including the supporting seat, the supporting seat is inside hollow shell structure, the bottom both sides of supporting seat are provided with a plurality of rag umbrellas and collude, and is a plurality of rag umbrellas collude the upper end with the junction threaded connection of supporting seat has rag bolt, and is a plurality of rag bolt's upper end is provided with the second hexagon nut, the second hexagon nut with rag umbrellas collude threaded connection, a plurality of rag bolt's middle part with the junction of supporting seat is provided with rag nut, and is a plurality of rag bolt's lower extreme is provided with the rag support.
At present, although the production of the workbench base of the numerical control machine tool can be realized, the prior art is not fully considered, and the clamping device for processing the machine tool body still uses the traditional long clamping plate to effectively fix the machine tool body on the upper surface of the workbench, and the clamping device needs manual operation, has the advantages of large assembly workload, unstable clamping state and low working efficiency.
In order to solve one of the above problems, an auxiliary fixture for machining a machine tool body is needed.
Disclosure of utility model
According to the defects in the prior art, the technical problem to be solved by the utility model is how to realize that one end of the carriage is controlled by the telescopic reciprocating driving mechanism to be close to the machine tool body, and then the carriage is driven to descend by the pressing mechanism controlled by the lifting driving mechanism when the carriage reaches a specified position, and the end of the carriage is pressed on the base of the machine tool body, so that the machine tool body can be effectively fixed on the upper surface of the workbench, and the auxiliary clamp for machining the machine tool body is provided.
The auxiliary clamp for machining the machine tool body comprises a gate-shaped frame and a pressing mechanism, wherein the gate-shaped frame is arranged on the upper surface of a workbench, the pressing mechanism is used for pressing and fixing the side edge of the machine tool body, the auxiliary clamp is characterized in that a lifting driving mechanism is arranged on a cross beam of the gate-shaped frame, a sliding frame which is used for guiding sliding of the pressing mechanism is arranged at the telescopic end of the lifting driving mechanism, the sliding frame is horizontally arranged and driven to lift by the lifting driving mechanism, and a telescopic reciprocating driving mechanism which is used for driving the pressing mechanism to slide relative to the sliding frame is arranged on the sliding frame.
Preferably, the door-shaped frame comprises a horizontal beam, two ends of the beam are respectively and vertically connected with a left upright post and a right upright post, the bottoms of the left upright post and the right upright post are respectively provided with a first connecting pin and a second connecting pin, and the first connecting pin and the second connecting pin are respectively and detachably provided with a first T-shaped bolt and a second T-shaped bolt which are connected with a T-shaped groove of the workbench. The installation is convenient, and the device is suitable for a workbench with a T-shaped groove.
Preferably, the carriage includes the left side sleeve pipe and the right side sleeve pipe that are parallel to each other and the level set up, be connected with middle connecting pipe perpendicularly between left side sleeve pipe and the right side sleeve pipe that sideslips, constitute H type structure, middle part of middle connecting pipe is provided with the middle part connecting hole that runs through, middle part connecting hole is connected with lifting drive mechanism's flexible end cooperation. The strength of the structure is ensured while guiding is provided for the compressing mechanism.
Preferably, the compressing mechanism comprises a first compression bar and a second compression bar which are parallel to each other and horizontally arranged, the tail ends of the first compression bar and the second compression bar are connected through a tail end connecting pipe, the left sliding sleeve is sleeved on the first compression bar and slides in a telescopic manner in cooperation with the first compression bar, and the right sliding sleeve is sleeved on the second compression bar and slides in a telescopic manner in cooperation with the second compression bar. The pressing mechanism is provided with two groups of pressing rods, and the two groups of pressing rods are simultaneously pressed on the base of the machine tool body, so that the machine tool body is effectively fixed on the upper surface of the workbench. The lower surface of the tail end connecting pipe is lower than the lower surfaces of the first pressing rod and the second pressing rod, and the height difference is equal to or slightly smaller than the thickness of the base of the machine tool body, so that the pressing mechanism is in low-position time, the tail end connecting pipe is abutted to the upper surface of the workbench, and simultaneously two groups of pressing rods are simultaneously pressed on the base of the machine tool body.
Preferably, the lifting driving mechanism is a vertically arranged hydraulic cylinder, a front cylinder cover of the lifting driving mechanism is fixed at the middle part of the cross beam, and a piston rod of the door-shaped frame penetrates through the cross beam and is connected with the middle connecting pipe.
Preferably, the end part of the lifting driving mechanism piston rod is provided with an external thread, a first nut and a second nut which are matched with the external thread, the end part of the lifting driving mechanism piston rod penetrates through the middle connecting hole, the first nut and the second nut are respectively clamped on the upper side and the lower side of the middle connecting pipe, and the piston rod of the lifting driving mechanism is fixedly connected with the middle connecting pipe.
Preferably, the telescopic reciprocating driving mechanism is an air cylinder, the cylinder body of the telescopic reciprocating driving mechanism is fixed on the tail end connecting pipe, and the telescopic rod of the telescopic reciprocating driving mechanism is fixed on the middle connecting pipe.
Preferably, the left side sideslip sleeve, the right side sideslip sleeve, the middle connecting pipe, the first pressure lever, the second pressure lever and the tail end connecting pipe are square pipes.
Preferably, the lifting driving mechanism and the telescopic reciprocating driving mechanism of the auxiliary clamp for processing the machine tool bodies of the multiple groups are respectively connected to a corresponding existing hydraulic control system and pneumatic control system, so that synchronous telescopic operation of the lifting driving mechanisms of the multiple groups and synchronous telescopic operation of the telescopic reciprocating driving mechanisms of the multiple groups are realized.
Compared with the prior art, the utility model has the following beneficial effects:
The auxiliary fixture for machining the machine tool body comprises a plurality of groups of auxiliary fixtures for machining the machine tool body, wherein the auxiliary fixtures for machining the machine tool body are respectively arranged on the upper surfaces of the working tables on two sides of the machine tool body, when the machine tool body is required to be fixed, one end of a sliding frame is controlled to be close to the machine tool body by a telescopic reciprocating driving mechanism, when the machine tool body reaches a designated position, the sliding frame is driven to descend by a pressing mechanism controlled by a lifting driving mechanism, the end of the sliding frame is pressed on a base of the machine tool body in a pressing mode, the machine tool body can be effectively fixed on the upper surface of the working table, a grinding machine and a milling machine are matched to polish a guide rail mounting surface, holes are drilled on the guide rail mounting surface, and the pressing efficiency of equipment is improved.
The auxiliary clamp for machining the machine tool body is characterized in that a middle connecting pipe is vertically connected between a left sideslip sleeve and a right sideslip sleeve to form an H-shaped structure, a middle connecting hole penetrating through the middle connecting pipe is formed in the middle of the middle connecting pipe, the middle connecting hole is connected with a telescopic end of a lifting driving mechanism in a matched mode, and the strength of the structure is guaranteed while guiding is provided for a compressing mechanism.
The auxiliary fixture for machine tool body processing can realize multi-group combined control, and the lifting driving mechanism and the telescopic reciprocating driving mechanism of the auxiliary fixture for machine tool body processing are respectively connected to the corresponding existing hydraulic control system and pneumatic control system, so that synchronous telescopic operation of the multi-group lifting driving mechanism and synchronous telescopic operation of the multi-group telescopic reciprocating driving mechanism are realized.
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. Like elements or portions are generally identified by like reference numerals throughout the several figures. In the drawings, elements or portions thereof are not necessarily drawn to scale.
FIG. 1 is a schematic diagram of a first embodiment of the present utility model;
FIG. 2 is a schematic diagram of a second embodiment of the present utility model;
FIG. 3 is a schematic diagram III of the structure of the present utility model;
FIG. 4 is a schematic view of the external structure of the carriage, hold-down mechanism and telescoping reciprocating drive mechanism of the present utility model;
Fig. 5 is a schematic view of the external structure of the door frame.
In the figure, 1, a door-shaped frame 1.1, a cross beam 1.2, a left upright post 1.3, a right upright post 1.4, a first connecting pin 1.5, a second connecting pin 1.6, a first T-shaped bolt 1.7, a second T-shaped bolt 2, a lifting driving mechanism 3, a sliding frame 3.1, a left side sliding sleeve 3.2, a right side sliding sleeve 3.3, a middle connecting pipe 3.4, a middle connecting hole 4, a pressing mechanism 4.1, a first pressing rod 4.2, a second pressing rod 4.3, a tail connecting pipe 5, a telescopic reciprocating driving mechanism 6, a workbench 7 and a machine tool body.
Detailed Description
The present utility model is further described with reference to the following drawings, which are given by way of illustration and not limitation, and any modifications, equivalents, improvements, etc. which fall within the spirit and principle of the present utility model are intended to be included in the scope of the present utility model.
Embodiment 1, as shown in fig. 1-2, the auxiliary fixture for machining a machine tool body comprises a door-shaped frame 1 arranged on the upper surface of a workbench 6 and a pressing mechanism 4 for pressing and fixing the side edge of the machine tool body, wherein a lifting driving mechanism 2 is arranged on a cross beam of the door-shaped frame 1, a sliding frame 3 for guiding sliding of the pressing mechanism 4 is arranged at a telescopic end of the lifting driving mechanism 2, the sliding frame 3 is horizontally arranged and driven to lift by the lifting driving mechanism 2, and a telescopic reciprocating driving mechanism 5 for driving the pressing mechanism 4 to slide relative to the sliding frame 3 is arranged on the sliding frame 3.
Firstly, a machine tool body 7 to be machined is hoisted and transferred to the upper surface of a workbench 6, a plurality of groups of auxiliary clamps for machining the machine tool body are respectively arranged on the upper surfaces of the workbench 6 at two sides of the machine tool body 7, when the machine tool body 7 needs to be fixed in the initial state (shown in figure 1), one end of a sliding frame 3 is controlled by a telescopic reciprocating driving mechanism 5 to be close to the machine tool body 7, when the machine tool body 7 reaches a specified position (shown in figure 2), finally, the sliding frame 3 is controlled by a lifting driving mechanism 2 to drive a pressing mechanism 4 to descend, the end part of the sliding frame 3 is pressed and connected to a base of the machine tool body 7 (shown in figure 3), the machine tool body 7 can be effectively fixed on the upper surface of the workbench 6, and a grinding machine and a milling machine are matched to grind a guide rail mounting surface, so that holes can be drilled on the guide rail mounting surface.
Embodiment 2, as shown in fig. 1-2, the auxiliary fixture for machining a machine tool body comprises a door-shaped frame 1 and a compressing mechanism 4, wherein the door-shaped frame 1 is arranged on the upper surface of a workbench 6, the compressing mechanism 4 is used for compressing and fixing the side edge of the machine tool body, a lifting driving mechanism 2 is arranged on a cross beam of the door-shaped frame 1, a sliding frame 3 which is used for guiding the compressing mechanism 4 in a sliding manner is arranged at the telescopic end of the lifting driving mechanism 2, the sliding frame 3 is horizontally arranged and driven to lift by the lifting driving mechanism 2, and a telescopic reciprocating driving mechanism 5 which is used for driving the compressing mechanism 4 to slide relative to the sliding frame 3 is arranged on the sliding frame 3.
Further, referring to fig. 5, the portal frame 1 includes a horizontal beam 1.1, two ends of the beam 1.1 are respectively and vertically connected with a left side upright 1.2 and a right side upright 1.3, the bottoms of the left side upright 1.2 and the right side upright 1.3 are respectively provided with a first connecting pin 1.4 and a second connecting pin 1.5, and the first connecting pin 1.4 and the second connecting pin 1.5 are respectively and detachably provided with a first T-shaped bolt 1.6 and a second T-shaped bolt 1.7 which are connected with a T-shaped groove of the workbench. The installation is convenient, and is suitable for the workbench 6 with the T-shaped groove.
Further, referring to fig. 4, the carriage 3 includes a left side sliding sleeve 3.1 and a right side sliding sleeve 3.2 that are parallel to each other and horizontally disposed, an intermediate connection pipe 3.3 is vertically connected between the left side sliding sleeve 3.1 and the right side sliding sleeve 3.2, so as to form an H-shaped structure, a middle connection hole 3.4 penetrating through is provided in the middle of the intermediate connection pipe 3.3, and the middle connection hole 3.4 is connected with a telescopic end of the lifting driving mechanism 2 in a matching manner. The compression mechanism 4 is guided while the strength of the structure is ensured.
Further, the pressing mechanism 4 comprises a first pressing rod 4.1 and a second pressing rod 4.2 which are parallel to each other and horizontally arranged, the tail ends of the first pressing rod 4.1 and the second pressing rod 4.2 are connected through a tail end connecting pipe 4.3, the left side sliding sleeve 3.1 is sleeved on the first pressing rod 4.1 and is matched with the first pressing rod 4.1 to slide in a telescopic manner, and the right side sliding sleeve 3.2 is sleeved on the second pressing rod 4.2 and is matched with the second pressing rod 4.2 to slide in a telescopic manner. The pressing mechanism 4 is provided with two groups of pressing rods, and the two groups of pressing rods are simultaneously pressed on the base of the machine tool body 7, so that the machine tool body 7 is effectively fixed on the upper surface of the workbench 6. The lower surface of the tail end connecting pipe 4.3 is lower than the lower surfaces of the first compression bar 4.1 and the second compression bar 4.2, and the height difference is equal to or slightly smaller than the thickness of the base of the machine tool body 7, so that the pressing mechanism 4 is in low-position time, the tail end connecting pipe 4.3 is abutted to the upper surface of the workbench 6, and simultaneously two groups of compression bars are simultaneously pressed on the base of the machine tool body 7.
Further, the lifting driving mechanism 2 is a vertically arranged hydraulic cylinder, a front cylinder cover of the lifting driving mechanism 2 is fixed in the middle of the cross beam 1.1, and a piston rod of the door-shaped frame 1 penetrates through the cross beam 1.1 and is connected with the middle connecting pipe 3.3.
Further, an external thread, a first nut and a second nut matched with the external thread are arranged at the end part of the piston rod of the lifting driving mechanism 2, the end part of the piston rod of the lifting driving mechanism 2 penetrates through the middle connecting hole 3.4, the first nut and the second nut are respectively clamped at the upper side and the lower side of the middle connecting pipe 3.3, and the piston rod of the lifting driving mechanism 2 is fixedly connected with the middle connecting pipe 3.3.
Further, the telescopic reciprocating driving mechanism 5 is an air cylinder, the cylinder body of the telescopic reciprocating driving mechanism 5 is fixed on the tail end connecting pipe 4.3, and the telescopic rod of the telescopic reciprocating driving mechanism 5 is fixed on the middle connecting pipe 3.3.
Further, the left side sliding sleeve 3.1, the right side sliding sleeve 3.2, the middle connecting pipe 3.3, the first compression bar 4.1, the second compression bar 4.2 and the tail end connecting pipe 4.3 are square pipes.
Further, the lifting driving mechanism 2 and the telescopic reciprocating driving mechanism 5 of the auxiliary clamp for processing the machine tool bodies of the multiple groups are respectively connected to a corresponding existing hydraulic control system and an air control system, so that synchronous telescopic operation of the lifting driving mechanisms 2 and synchronous telescopic operation of the telescopic reciprocating driving mechanisms 5 of the multiple groups are realized.
The auxiliary fixture for machining the machine tool body comprises a plurality of groups of auxiliary fixtures for machining the machine tool body, wherein the auxiliary fixtures for machining the machine tool body are respectively arranged on the upper surfaces of the working tables on two sides of the machine tool body, when the machine tool body is required to be fixed, one end of a sliding frame is controlled to be close to the machine tool body by a telescopic reciprocating driving mechanism, when the machine tool body reaches a designated position, the sliding frame is driven to descend by a pressing mechanism controlled by a lifting driving mechanism, the end of the sliding frame is pressed on a base of the machine tool body in a pressing mode, the machine tool body can be effectively fixed on the upper surface of the working table, a grinding machine and a milling machine are matched to polish a guide rail mounting surface, holes are drilled on the guide rail mounting surface, and the pressing efficiency of equipment is improved.
The auxiliary clamp for machining the machine tool body is characterized in that a middle connecting pipe is vertically connected between a left sideslip sleeve and a right sideslip sleeve to form an H-shaped structure, a middle connecting hole penetrating through the middle connecting pipe is formed in the middle of the middle connecting pipe, the middle connecting hole is connected with a telescopic end of a lifting driving mechanism in a matched mode, and the strength of the structure is guaranteed while guiding is provided for a compressing mechanism.
The auxiliary fixture for machine tool body processing can realize multi-group combined control, and the lifting driving mechanism and the telescopic reciprocating driving mechanism of the auxiliary fixture for machine tool body processing are respectively connected to the corresponding existing hydraulic control system and pneumatic control system, so that synchronous telescopic operation of the multi-group lifting driving mechanism and synchronous telescopic operation of the multi-group telescopic reciprocating driving mechanism are realized.
The foregoing has shown and described the basic principles, main features and advantages of the present utility model. It will be understood by those skilled in the art that the present utility model is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present utility model, and various changes and modifications may be made without departing from the spirit and scope of the utility model, which is defined in the appended claims. The scope of the utility model is defined by the appended claims and equivalents thereof.
The present invention is not described in detail in the present application, and is well known to those skilled in the art.
Claims (5)
1. The auxiliary clamp for machining the machine tool body comprises a gate-shaped frame and a pressing mechanism, wherein the gate-shaped frame is arranged on the upper surface of a workbench, the pressing mechanism is used for pressing and fixing the side edge of the machine tool body, the auxiliary clamp is characterized in that a lifting driving mechanism is arranged on a cross beam of the gate-shaped frame, a sliding frame which is used for guiding sliding of the pressing mechanism is arranged at the telescopic end of the lifting driving mechanism, the sliding frame is horizontally arranged and driven to lift by the lifting driving mechanism, and a telescopic reciprocating driving mechanism which is used for driving the pressing mechanism to slide relative to the sliding frame is arranged on the sliding frame.
2. The auxiliary fixture for machining the machine tool body according to claim 1, wherein the door-shaped frame comprises a horizontal beam, two ends of the beam are respectively and vertically connected with a left upright post and a right upright post, the bottoms of the left upright post and the right upright post are respectively provided with a first connecting pin and a second connecting pin, and the first connecting pin and the second connecting pin are respectively and detachably provided with a first T-shaped bolt and a second T-shaped bolt which are connected with a T-shaped groove of the workbench.
3. The auxiliary fixture for machining a machine tool body according to claim 2, wherein the carriage comprises a left side sliding sleeve and a right side sliding sleeve which are parallel to each other and horizontally arranged, an intermediate connecting pipe is vertically connected between the left side sliding sleeve and the right side sliding sleeve to form an H-shaped structure, a middle connecting hole penetrating through the intermediate connecting pipe is formed in the middle of the intermediate connecting pipe, and the middle connecting hole is connected with a telescopic end of the lifting driving mechanism in a matched mode.
4. The auxiliary clamp for machining a machine tool body according to claim 3, wherein the pressing mechanism comprises a first pressing rod and a second pressing rod which are parallel to each other and horizontally arranged, tail ends of the first pressing rod and the second pressing rod are connected through a tail end connecting pipe, the left sliding sleeve is sleeved on the first pressing rod and is matched with the first pressing rod to slide in a telescopic manner, and the right sliding sleeve is sleeved on the second pressing rod and is matched with the second pressing rod to slide in a telescopic manner.
5. The auxiliary fixture for machining a machine tool body according to claim 4, wherein the lifting driving mechanism is a vertically arranged hydraulic cylinder, a front cylinder cover of the lifting driving mechanism is fixed at the middle part of the cross beam, and a piston rod of the door-shaped frame penetrates through the cross beam and is connected with the middle connecting pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202421016639.4U CN222199706U (en) | 2024-05-11 | 2024-05-11 | Auxiliary fixture for machine tool bed processing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202421016639.4U CN222199706U (en) | 2024-05-11 | 2024-05-11 | Auxiliary fixture for machine tool bed processing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN222199706U true CN222199706U (en) | 2024-12-20 |
Family
ID=93873068
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202421016639.4U Active CN222199706U (en) | 2024-05-11 | 2024-05-11 | Auxiliary fixture for machine tool bed processing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN222199706U (en) |
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2024
- 2024-05-11 CN CN202421016639.4U patent/CN222199706U/en active Active
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