CN220507907U - Gear tooth tip height detection device - Google Patents
Gear tooth tip height detection device Download PDFInfo
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- CN220507907U CN220507907U CN202321954722.1U CN202321954722U CN220507907U CN 220507907 U CN220507907 U CN 220507907U CN 202321954722 U CN202321954722 U CN 202321954722U CN 220507907 U CN220507907 U CN 220507907U
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- 238000001514 detection method Methods 0.000 title claims abstract description 68
- 238000005259 measurement Methods 0.000 claims abstract description 25
- 238000006073 displacement reaction Methods 0.000 claims description 22
- 238000009434 installation Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 230000000670 limiting effect Effects 0.000 description 5
- 230000002159 abnormal effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
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- 238000003754 machining Methods 0.000 description 1
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Abstract
The utility model provides a gear tooth tip height detection device which comprises a carrying platform, an angular positioning mechanism and a tooth tip height measurement mechanism, wherein the carrying platform is arranged on a machine table; the angular positioning mechanism can limit the tooth to be detected of the gear to be detected to the detection position, and automatic alignment of the tooth to be detected and the tooth tip height measuring mechanism is realized. The gear tooth tip height detection device provided by the utility model utilizes the positioning block to preliminarily position the gear to be detected, and then realizes the alignment of the gear to be detected and the detection position through the angular positioning mechanism, so that the positioning operation is simple and effective, the gear chamfering detection efficiency of the synchronizer is effectively improved, and the production efficiency is improved.
Description
Technical Field
The utility model relates to the technical field of gear quality detection, in particular to a gear tooth tip height detection device.
Background
In the automobile gear shifting process, chamfering is carried out on gear combining teeth of the synchronizer in order to ensure that the synchronizer smoothly enters into the gear. When the height of the chamfer of the combination tooth is unqualified, the shifting ring moment is directly influenced, and the gear shifting force is abnormal, so that the tooth tip height of the combination tooth of the produced synchronizer is required to be detected to adaptively adjust the production configuration according to the actual production result in order to ensure the quality of products.
In the prior art, the fine detection equipment is used for detecting the tooth tip height of the synchronizer combination tooth, a certain time is required from an operation post to a fine detection chamber, a detection result is required to be waited, a detection period is long, the fine detection equipment in the prior art is provided with a detection mandrel, and after the synchronizer gear is arranged on the detection mandrel, the detection mandrel is required to be corrected and rotated, so that the tooth to be detected of the synchronizer gear faces a measuring needle, the operation is complex, and the detection efficiency is low.
Disclosure of Invention
Based on the above, the utility model aims to provide a gear tooth tip height detection device so as to improve the detection efficiency of the gear tooth tip height of a synchronizer and the production efficiency.
In one aspect, the present utility model provides a gear tooth tip height detection device, comprising: a carrying platform arranged on the machine platform, an angular positioning mechanism and a tooth tip height measuring mechanism, wherein,
the bearing position of the carrier is provided with a positioning block, and the outer diameter of the positioning block is consistent with the inner diameter of the gear to be tested;
the angular positioning mechanism is arranged on one side of a bearing position of the carrier and can move back and forth along the direction towards the positioning block, and when the movable part of the angular positioning mechanism is abutted against a gear to be detected arranged on the bearing position, the gear to be detected of the gear to be detected can be positioned on a detection position;
the tooth tip height measuring mechanism is arranged above the detection position.
Optionally, two first positioning rods are horizontally arranged at intervals at the front end of the movable part of the angular positioning mechanism, horizontal symmetrical center shafts of the two first positioning rods point to the bearing position center position of the carrying platform, and positioning balls are arranged at the front ends of the first positioning rods.
Optionally, the front end of the movable part is provided with a second positioning rod, the front end of the second positioning rod is provided with a trapezoid opening structure, and the central axis of symmetry of the opening structure points to the center of the positioning block.
Optionally, the angular positioning mechanism further comprises a driving rod and a driving rod mounting block, wherein,
the driving rod mounting block is fixedly arranged on the machine table;
the driving rod is movably arranged through the driving rod mounting block, and one end of the driving rod is connected to the movable part;
the driving rod installation block is also provided with a movable locker which is movably locked and matched with the driving rod.
Optionally, a mandrel extends from the lower part of the positioning block, a mounting hole is formed in the carrier, and the positioning block is detachably arranged on the carrier through the mandrel and the mounting hole.
Optionally, a positioning pin protruding into the mounting hole is arranged on the side of the mounting hole of the carrier;
the outer wall of the mandrel is provided with a guide groove matched with the positioning pin;
the guide groove comprises a vertical section and a horizontal section which are continuously arranged, the horizontal section is arranged in the middle of the mandrel and extends along the circumferential direction of the mandrel, and the vertical section extends from the bottom end of the mandrel to one end of the horizontal section.
Optionally, the tooth tip height measurement mechanism comprises a displacement measurer, a push rod, a measurement block and a measurement head, wherein the displacement measurer, the push rod and the measurement block are vertically connected in sequence, the measurement head is downwards extended from the measurement block, and the measurement head is arranged above the detection position.
Optionally, a strip groove is disposed at the lower end of the measuring head, and a strip extending direction of the strip groove points to a central position of the bearing position.
Optionally, the displacement measurer comprises a dial gauge.
Optionally, the displacement measurer comprises a digital display meter.
The gear tooth tip height detection device comprises a carrying platform, an angular positioning mechanism and a tooth tip height measurement mechanism, wherein the carrying platform is arranged on a machine table; the angular positioning mechanism can limit the tooth to be detected of the gear to be detected to the detection position, so that the alignment of the tooth to be detected and the tooth tip height measuring mechanism is realized; the gear tooth tip height detection device provided by the utility model utilizes the positioning block to preliminarily position the gear to be detected, and then realizes the alignment of the gear to be detected and the detection position through the angular positioning mechanism, so that the positioning operation is simple and effective, the gear chamfering detection efficiency of the synchronizer is effectively improved, and the production efficiency is improved.
Drawings
FIGS. 1A, 1B, 1C and 1D are schematic views of a synchronizer gear;
FIG. 2 is a schematic diagram showing the front view of a gear tooth-tip height detection device according to an embodiment of the present utility model;
FIG. 3 is a schematic side view of a gear tooth tip height detection device according to an embodiment of the present utility model;
FIG. 4 is a schematic top view of a part of a gear tooth-tip height detecting device according to an embodiment of the present utility model;
fig. 5 is a schematic structural view of a tooth tip height measuring mechanism of a gear tooth tip height detecting device in an embodiment of the utility model.
Description of main reference numerals: gear 01 to be measured, tooth 011 to be measured, machine 110, carrier 120, mounting hole 121, positioning pin 122, positioning block 101, guide groove 1011, mounting bracket 130, guide bracket 131, displacement measuring instrument 102, measuring end 1021, jack 141, measuring block 142, measuring head 143, fixed part 151, movable part 152, positioning rod 153, driving rod 154, driving rod mounting block 155, and positioning ball 1531.
The utility model will be further described in the following detailed description in conjunction with the above-described figures.
Detailed Description
In order that the utility model may be readily understood, a more complete description of the utility model will be rendered by reference to the appended drawings. Several embodiments of the utility model are presented in the figures. This utility model may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "mounted" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1A, 1B, 1C and 1D, a schematic structural diagram of a synchronizer gear is shown, wherein the synchronizer gear has a ring structure so as to be assembled on a transmission shaft, a plurality of tooth structures are arranged on the outer side of the synchronizer gear, and chamfering is performed on the tooth structures in a locking angle direction (as shown in fig. 1C) in order to ensure that the synchronizer smoothly enters the gear.
The distance H from the tooth surface to the tooth root is the tooth tip height, and when the tooth tip height is unqualified, the shifting ring moment is directly influenced, so that the gear shifting force is abnormal, and therefore, in order to ensure the quality of products, the tooth tip height of the produced synchronizer combined tooth is required to be detected.
As shown in fig. 1D, the solid outline corresponds to a standard part, the broken outline corresponds to an abnormal part, the tooth surface and the tooth root of the tooth structure are fixed in size in the machining and forming process, when the tooth tip height deviates from the standard, the chamfer surface is deflected and deflected after chamfering, and whether the tooth structure size of the gear is qualified is obtained by detecting whether the chamfer surface is deflected or not.
Based on the problems that in the prior art, the operation of adjusting and controlling the tooth surface to be perpendicular to the test probe is complex, so that the detection of the tooth tip height of the gear is complex and the efficiency is low, the utility model provides the gear tooth tip height detection device, so that the operation complexity of positioning and limiting of a synchronizer gear is reduced, and the detection efficiency is improved.
Referring to fig. 2, 3, 4 and 5, a schematic diagram of each part of a gear tooth tip height detection device according to an embodiment of the utility model is shown.
The gear tooth tip height detection device of the present embodiment mainly includes a carrier 120, an angular positioning mechanism, and a tooth tip height measurement mechanism, which are disposed on a machine 110.
The bearing position of the carrier 120 is provided with a positioning block 101, and the outer diameter of the positioning block 101 is consistent with the inner diameter of the gear 01 to be measured, so that the gear 01 to be measured can be sleeved on the positioning block 101 and can rotate around the positioning block 101 when being placed on the carrier 120.
The angular positioning mechanism is arranged at one side of the bearing position of the carrier 110, is aligned with the positioning block 101 in height, can reciprocate towards the positioning block 101, and can rapidly position the tooth to be detected of the gear 01 to be detected at the detection position when the movable part of the angular positioning mechanism abuts against the gear 01 to be detected at the bearing position; the tooth tip height measuring mechanism is arranged above the detecting position, after the tooth to be detected of the gear 01 to be detected is positioned at the detecting position, the tooth tip height measuring mechanism is operated to enable the tooth tip height measuring mechanism to be in displacement contact with the tooth to be detected of the gear 01 to be detected, the displacement is obtained, the displacement is compared with the displacement of the standard synchronizer gear, and the difference between the tooth tip height of the tooth to be detected of the gear 01 to be detected and the standard height can be obtained, so that the detection of the tooth tip height of the gear is realized.
The gear tooth tip height detection device of the embodiment enables the gear 01 to be detected placed on the carrier 120 to rotate around the positioning block 101 through the positioning block 101, and the rotation angle of the gear 01 to be detected is positioned through the angular positioning mechanism, so that the tooth 01 to be detected after positioning can be positioned at the detection position and is aligned and matched with the tooth tip height measurement mechanism above the detection position, the positioning limiting operation of the tooth 01 to be detected is simple and effective, the gear chamfering detection efficiency of the synchronizer is effectively improved, and the production efficiency is improved.
In this embodiment, two first positioning rods 153 are horizontally disposed at intervals at the front end of the movable portion 152 of the angular positioning mechanism, the horizontal symmetrical center axes of the two first positioning rods 153 point to the center position of the positioning block 101, the center position of the gear 01 to be measured is consistent with the center position of the positioning block 101, and a positioning ball 1531 is disposed at the front end of the first positioning rod 153.
When the teeth 011 to be measured of the gear 01 to be measured are not aligned with the horizontal symmetrical center axes of the two first positioning rods 153, the gear 01 to be measured moves along with the two first positioning rods 153, one of the two positioning balls 1531 props against the corresponding tooth structure to drive the gear 01 to be measured to rotate, and when the other one of the two positioning balls 1531 props against the tooth structure on the other side of the teeth 011 to be measured and moves to the limit, the two tooth structures against which the two positioning balls 1531 prop against are symmetrical relative to the teeth 011 to be measured, and the number of the tooth structures of the gear is an odd number, so that the teeth 011 to be measured at the moment are ensured to be opposite to the horizontal symmetrical center axes of the two first positioning rods 153, and accurate positioning of the teeth 011 to be measured is realized.
In this embodiment, two first positioning rods 153 are provided, so that the position of the gear 011 to be measured after positioning is free from other shielding, the blocking of the first positioning rods 153 to the tooth tip height measuring mechanism is avoided, and the measuring reliability of the tooth tip height measuring mechanism is ensured.
In an alternative embodiment, the front end of the movable portion 152 is provided with a second positioning rod, the front end of the second positioning rod is provided with an opening structure, and the symmetrical central axis of the second positioning rod and the opening structure thereof points to the center of the positioning block 101, when the tooth 011 to be measured is positioned, the gear 01 to be measured is initially rotated, the tooth 011 to be measured is initially aligned with the second positioning rod, then the angular positioning mechanism is driven to act, the second positioning rod is abutted to the tooth 011 to be measured along the direction of pointing to the center of the positioning block 101, one side of the opening interface at the front end of the second positioning rod is abutted to the tooth 011 to be measured, and along with the further action of the second positioning rod, the second positioning rod can drive the gear 01 to be measured to rotate, so that two side surfaces of the tooth 011 to be measured are abutted to contact with two side surfaces of the opening interface, the tooth 011 to be measured is opposite to the symmetrical central axis of the opening structure, and positioning alignment of the tooth 011 to be measured in the angular direction is realized. In a specific implementation, the opening structure of the second positioning rod is an inverted trapezoid opening, and the side surface of the second positioning rod is matched with the side surface of the tooth 011 to be detected in a fit mode, so that the limiting effect can be improved.
In this embodiment, the angular positioning mechanism further includes a driving rod 154 and a driving rod mounting block 155, where the movable portion 152 is slidably connected to the fixed portion 151, and the fixed portion 151 is fixed on the machine 110; the driving rod mounting block 155 is fixedly arranged on the machine 110; the driving rod 154 is movably disposed through the driving rod mounting block 155, and one end of the driving rod is connected to the movable portion 152, and the movable portion 152 can be driven to reciprocate along a preset direction by pushing and pulling the driving rod 154, so that the angular positioning and the positioning release of the angular positioning mechanism on the gear 01 to be measured are realized.
The driving rod mounting block 155 is further provided with a movable locker (not shown in the figure), the movable locker is movably locked and matched with the driving rod 154, when the driving rod 154 drives the movable portion 152 to move to a limit position, it is confirmed that the tooth 011 to be detected of the gear 01 to be detected is limited to a detection position by the angular positioning mechanism, at this time, the driving rod 154 is locked by the movable locker, and the angular positioning mechanism can fix the limit of the tooth 011 to be detected of the gear 01 to be detected, so that the tooth 011 to be detected is firmly fixed and detected, the risk that the tooth 011 to be detected shifts in subsequent detection is avoided, and the reliability of detection is ensured.
In this embodiment, a mandrel is extended below the positioning block 101, a mounting hole 121 is provided on the carrier 120, the positioning block 101 is detachably disposed on the carrier 120 through the mandrel and the mounting hole 121, so that corresponding positioning blocks can be flexibly replaced according to different types of gears to be detected, compatibility of the gear tooth tip height detection device to detection requirements of various gears to be detected is improved, and practicality is improved.
In this embodiment, a positioning pin 122 protruding into the mounting hole 121 is provided at a side of the mounting hole 121 of the carrier 120; the outer wall of the mandrel of the positioning block 101 is provided with a guide groove 1011 matched with the positioning pin 122.
The guide slot 1011 includes a vertical section and a horizontal section that are continuously disposed, the horizontal section is disposed in the middle of the mandrel and extends along the circumferential direction of the mandrel, the vertical section extends from the bottom end of the mandrel to one end of the horizontal section, when the positioning block 101 is assembled, the guide slot 1011 is aligned with the positioning pin 122, after the positioning block 101 is put down, the positioning block 101 is rotated along the extending direction of the horizontal section of the guide slot 1011, so that the positioning block 101 can be stably fixed on the carrier 120 according to the positioning pin 122 and the guide slot 1011.
The extending span of the horizontal section of the guide slot 1011 is, for example, 90 degrees, the positioning block 101 rotates 90 degrees to the bottom after being put down, and when being taken out, the positioning block 101 rotates 90 degrees in the opposite direction, so that the corresponding positioning block 101 can be flexibly selected according to the specific size of the gear 01 to be measured.
In this embodiment, the tooth tip height measuring mechanism includes a displacement measurer 102, a push rod 141, a measuring block 142, and a measuring head 143 extending downward from the measuring block 142, where the measuring head 143 is disposed above the detecting position, and when measuring, the measuring block 142 moves downward to drive the measuring head 143 to abut against the tooth tip of the tooth 011 to be measured, and the measuring head 143 is supported by the tooth 011 to be measured in a limited manner, and at this time, the measuring head 142 is connected with a measuring end 1021 of the displacement measurer 102 through the push rod 141, and the displacement thereof is indicated by the displacement measurer 102.
The measurement block 142 is disposed, so that when the displacement limitation is released, the weight of the measurement block 142 can be utilized to make the measurement head 143 fully and naturally drop to the position of the tooth 011 to be measured, thereby ensuring that the measurement can be effectively performed.
In this embodiment, the lower end of the measuring head 143 is provided with a bar groove, and the bar extending direction of the bar groove points to the central position of the bearing position, when the tooth 011 to be measured is positioned at the detecting position in a limited manner, the projection of the central axis of the bar groove and the projection of the bar extending direction of the bar groove on the horizontal plane coincide, so that when the measuring head 143 is lowered and contacts with the tooth 011 to be measured, the two side wall edges of the bar groove at the lower end of the measuring head 143 simultaneously contact with two chamfer surfaces of the tooth 011 to be measured, and the measuring head 143 is of a block structure, the structural strength of the bar groove is guaranteed, the damage risk of the measuring head 143 can be reduced, the reliability of the tooth tip height measuring mechanism is improved, the damage risk of the measuring head 143 is not required to be considered particularly, and the convenience of measurement execution can be improved.
In this embodiment, the tooth tip height measuring mechanism is disposed above the detection position through the mounting bracket 130 and the guide bracket 131, the guide bracket 131 is disposed on the mounting bracket 130, the mounting bracket 130 is fixedly disposed on the machine table 110, the displacement measurer 102 is fixed on the guide bracket 131, the guide bracket 131 is provided with a vertical guide rail, the ejector rod 141 and the measuring block 142 are slidably connected with the guide rail, and in a specific embodiment, the ejector rod 141 and the measuring block 142 are directly connected with the guide rail or indirectly connected with other mounting brackets, and can be lifted and lowered through the control of the lever structure.
In this embodiment, the displacement measurer 102 includes a dial indicator, which can meet the measurement accuracy requirement, and in an alternative embodiment, the displacement measurer includes a digital display meter, which is more convenient for reading the displacement.
The gear tooth tip height detection device comprises a carrying platform, an angular positioning mechanism and a tooth tip height measurement mechanism, wherein the carrying platform is arranged on a machine table; the angular positioning mechanism can limit the tooth to be detected of the gear to be detected to the detection position, so that the alignment of the tooth to be detected and the tooth tip height measuring mechanism is realized; the gear tooth tip height detection device provided by the utility model utilizes the positioning block to preliminarily position the gear to be detected, and then realizes the alignment of the gear to be detected and the detection position through the angular positioning mechanism, so that the positioning operation is simple and effective, the gear chamfering detection efficiency of the synchronizer is effectively improved, and the production efficiency is improved.
It can be understood that the detection of the synchronizer gear is taken as an example in the embodiment, and in practical application, the tooth tip height detection device of the gear provided by the utility model can be also applicable to measurement of tooth tip heights of other gears with similar tooth structures.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing examples illustrate only a few specific embodiments of the utility model, which are described in greater detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.
Claims (10)
1. A gear tooth tip height detection device, comprising: a carrying platform arranged on the machine platform, an angular positioning mechanism and a tooth tip height measuring mechanism, wherein,
the bearing position of the carrier is provided with a positioning block, and the outer diameter of the positioning block is consistent with the inner diameter of the gear to be tested;
the angular positioning mechanism is arranged on one side of a bearing position of the carrier and can move back and forth along the direction towards the positioning block, and when the movable part of the angular positioning mechanism is abutted against a gear to be detected arranged on the bearing position, the gear to be detected of the gear to be detected can be positioned on a detection position;
the tooth tip height measuring mechanism is arranged above the detection position.
2. The gear tooth tip height detection device according to claim 1, wherein two first positioning rods are horizontally arranged at intervals at the front end of the movable part of the angular positioning mechanism, horizontal symmetrical center shafts of the two first positioning rods point to the bearing position center position of the carrying platform, and positioning balls are arranged at the front ends of the first positioning rods.
3. The gear tooth tip height detection device according to claim 1, wherein a second positioning rod is arranged at the front end of the movable portion, a trapezoid opening structure is arranged at the front end of the second positioning rod, and a central axis of symmetry of the opening structure points to the center of the positioning block.
4. The gear tooth tip height detection device according to claim 2 or 3, wherein the angular positioning mechanism further comprises a drive rod, a drive rod mounting block, wherein,
the driving rod mounting block is fixedly arranged on the machine table;
the driving rod is movably arranged through the driving rod mounting block, and one end of the driving rod is connected to the movable part;
the driving rod installation block is also provided with a movable locker which is movably locked and matched with the driving rod.
5. The gear tooth tip height detection device according to claim 1, wherein a mandrel extends out of the lower portion of the positioning block, a mounting hole is formed in the carrier, and the positioning block is detachably arranged on the carrier through the mandrel and the mounting hole.
6. The gear tooth tip height detection device according to claim 5, wherein,
a positioning pin protruding into the mounting hole is arranged on the side of the mounting hole of the carrier;
the outer wall of the mandrel is provided with a guide groove matched with the positioning pin;
the guide groove comprises a vertical section and a horizontal section which are continuously arranged, the horizontal section is arranged in the middle of the mandrel and extends along the circumferential direction of the mandrel, and the vertical section extends from the bottom end of the mandrel to one end of the horizontal section.
7. The gear tooth tip height detection device according to claim 1, wherein the tooth tip height measurement mechanism comprises a displacement measurer, a push rod, a measurement block and a measurement head extending downwards from the measurement block, wherein the displacement measurer, the push rod and the measurement block are vertically connected in sequence, and the measurement head is arranged above the detection position.
8. The gear tooth tip height detection device according to claim 7, wherein a strip-shaped groove is provided at a lower end of the measuring head, and a strip extending direction of the strip-shaped groove is directed to a center position of the bearing position.
9. The gear tooth-tip height detection device according to claim 7, wherein the displacement measurer comprises a dial gauge.
10. The gear tooth-tip height detection device according to claim 7 or 9, wherein the displacement measurer comprises a digital display meter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321954722.1U CN220507907U (en) | 2023-07-24 | 2023-07-24 | Gear tooth tip height detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321954722.1U CN220507907U (en) | 2023-07-24 | 2023-07-24 | Gear tooth tip height detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220507907U true CN220507907U (en) | 2024-02-20 |
Family
ID=89871599
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321954722.1U Active CN220507907U (en) | 2023-07-24 | 2023-07-24 | Gear tooth tip height detection device |
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| Country | Link |
|---|---|
| CN (1) | CN220507907U (en) |
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2023
- 2023-07-24 CN CN202321954722.1U patent/CN220507907U/en active Active
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