CN220772108U - Crane track detection device for heavy steel factory building - Google Patents
Crane track detection device for heavy steel factory building Download PDFInfo
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- CN220772108U CN220772108U CN202322251353.6U CN202322251353U CN220772108U CN 220772108 U CN220772108 U CN 220772108U CN 202322251353 U CN202322251353 U CN 202322251353U CN 220772108 U CN220772108 U CN 220772108U
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- 238000001514 detection method Methods 0.000 title claims abstract description 110
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 20
- 239000010959 steel Substances 0.000 title claims abstract description 20
- 230000000149 penetrating effect Effects 0.000 claims description 15
- 238000009434 installation Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000035929 gnawing Effects 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000007792 addition Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000003028 elevating effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- ORQBXQOJMQIAOY-UHFFFAOYSA-N nobelium Chemical compound [No] ORQBXQOJMQIAOY-UHFFFAOYSA-N 0.000 description 1
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- 238000006467 substitution reaction Methods 0.000 description 1
- 238000005491 wire drawing Methods 0.000 description 1
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Abstract
The heavy steel factory house crane track detection device comprises two detection main bodies, wherein each detection main body comprises an upper detection structure, a lower detection structure and a driving piece for connecting the upper detection structure and the lower detection structure; the upper detection structure comprises a U-shaped plate body with a downward opening, and a first detection piece arranged on the upper surface of the U-shaped plate body; the lower detection structure comprises two C-shaped plate bodies which are respectively positioned on two side surfaces of the crane track and are provided with openings in an opposite mode, and two second detection pieces which are respectively arranged on the two C-shaped plate bodies and are positioned on two sides of the lower surface of the crane track; the driving piece comprises two fixing plates which enable the lower ends of the U-shaped plate bodies to be connected with the two C-shaped plate bodies respectively, and driving wheels which are arranged on the side surfaces of the fixing plates and are in sliding connection with the side surfaces of the crane track. The utility model realizes the purpose of detecting the flatness of the upper wing plate surface and the lower wing plate surface of the crane track along the length direction of the track, widens the use field of the detection device, and has the advantage of strong practicability.
Description
Technical Field
The utility model belongs to the technical field of crane track detection, and particularly relates to a crane track detection device for a heavy steel factory building.
Background
Bridge cranes are an essential and important tool for modern production and construction such as material handling, loading, unloading, transportation and installation, and have wide application in various departments of national economy production. The track is used as a bearing device of the bridge crane and bears the dead weight of the bridge crane and the gravity of the lifted goods, and the condition of the track directly influences the stability and the service life of the bridge crane. The rail biting phenomenon is easy to occur in the use process of the bridge crane due to the fact that the manufacturing and mounting precision is difficult to guarantee and is influenced by factors such as abrasion, ground subsidence and the like, wherein the rail biting phenomenon refers to the fact that the wheel rim is in forced contact with the side face of a rail to generate horizontal side thrust in the operation process of the bridge crane cart or the bridge crane cart, and serious friction is caused between the wheel rim and the rail to cause serious abrasion of the wheel rim and the side face of the rail. The occurrence of the phenomenon of rail gnawing greatly influences the service life of the bridge crane and threatens the safe working state of the bridge crane. When the rail gnawing is serious, the bridge crane can derail during running, and serious safety accidents are caused.
The bridge crane track deformation detection mainly comprises track top horizontal straightness, track top center height straightness, two-rail track center span and two-rail track center height difference detection. The traditional bridge crane track deformation detection method mainly comprises a steel wire drawing detection method, a level gauge detection method and the like, wherein the detection methods have defects in detection principle and technical means, the labor capacity of measurement personnel is large, the detection result has low precision and large error, and the overhead operation has huge potential safety hazard and is easily influenced by human factors and external factors.
The document of the authorized bulletin number CN214372341U discloses a factory building crane track detection device, which comprises a detection device main body, wherein the detection device main body is two, and a single detection device main body comprises U-shaped pieces at two ends and a connecting plate for connecting the two U-shaped pieces: be equipped with first gyro wheel on the vertical section bottom surface of U-shaped spare, wear to be equipped with the sleeve on the U-shaped spare horizontal segment, wear to be equipped with the lifter in the sleeve, the lifter lower extreme is equipped with the second gyro wheel, the lifter upper end is equipped with the notch: a connecting rod is arranged between the upper ends of the two lifting rods positioned at the two ends of the single detection device main body, and the two ends of the connecting rod are respectively arranged in the notches at the upper ends of the two lifting rods: two U-shaped pieces at the same end are provided with bosses, one of which is provided with a parallelism detecting rod in a side wall in an inserted manner, the other boss is internally provided with an L-shaped pipe, a piston is arranged in the horizontal section of the L-shaped pipe, and the end part of the parallelism detecting rod extends into the horizontal section of the L-shaped pipe and is fixedly connected with the piston.
But this device also has the following problems: the single detection device can only detect the flatness along the direction of the crane rail, but cannot detect the flatness at the same position of the crane rail.
Disclosure of Invention
The utility model aims to solve the problems, and provides a heavy steel factory house crane track detection device, which realizes the purpose of detecting the flatness of the surface of an upper wing plate and the surface of a lower wing plate of a crane track along the length direction of the track simultaneously by arranging two detection main bodies with an upper detection structure, a lower detection structure and a driving piece, widens the use field of the detection device and has the advantage of strong practicability.
In order to achieve the above object, the technical scheme of the present utility model is as follows:
the heavy steel factory house crane track detection device comprises two detection main bodies arranged on a single crane track, wherein each detection main body comprises an upper detection structure, a lower detection structure and a driving piece for connecting the upper detection structure and the lower detection structure; the upper detection structure comprises a U-shaped plate body with a downward opening and a first detection piece arranged on the upper surface of the U-shaped plate body; the lower detection structure comprises two C-shaped plate bodies which are respectively positioned on two side surfaces of the crane track and are provided with openings which are opposite to each other, and two second detection pieces which are respectively arranged on the two C-shaped plate bodies and are positioned on two sides of the lower surface of the crane track; the driving piece comprises two fixing plates which enable the lower ends of the U-shaped plate bodies to be connected with the two C-shaped plate bodies respectively, and driving wheels which are arranged on the side faces of the fixing plates and are connected with the side faces of the crane track in a sliding mode.
As a further preferred aspect of the present utility model, each of the two second detecting members includes a sleeve provided on an end portion of a lower surface of the C-shaped plate body, and a lifting column penetrating the sleeve and abutting against a lower surface of the crane rail, and a first flatness detector is provided between the two lifting columns on the two second detecting members.
As a further preferred aspect of the present utility model, the two second detecting members further each include two rails provided on inner walls of both sides of the sleeve, slide bars provided on both side ends of the elevating column and slidably connected to the rails, and support springs provided on upper and lower bottom surfaces of the rails and connected to the slide bars.
As a further preferred aspect of the present utility model, the two slide bars adjacent to each other on the two second detecting members penetrate the rails, respectively, and the first flatness detecting device includes a transmitter provided on one of the slide bar ends, and a receiver provided on the other slide bar end.
As a further preferred aspect of the present utility model, both the second detecting members further include a roller provided on the lifting column and slidably coupled to the lower surface of the crane rail.
As a further preferred aspect of the present utility model, the driving member further includes two clamping structures provided at both upper and lower sides of the single fixing plate and respectively connected to upper and lower inner side surfaces of the crane rail.
As a further preferred aspect of the present utility model, the clamping structure includes two oppositely disposed risers provided on an upper surface or a lower surface of the fixed plate, two bar grooves provided on the two risers, respectively, a sliding column provided between the two risers, moving rods provided at both ends of the sliding column and slidably connected with the bar grooves, respectively, and a jack-up spring provided between the two risers and having both ends connected with the fixed plate and the sliding column, respectively, the end of the sliding column remote from the jack-up spring being provided with a pulley.
As a further preferred aspect of the present utility model, the lower detecting structure further includes a third detecting member including fixing blocks respectively provided on the two C-shaped plate bodies, fixing rods having both ends respectively connected to the two fixing blocks and located at the lower ends of the crane rails, a first cylinder penetrating through the middle of the fixing rods, a first lifting rod penetrating through the first cylinder and abutting against the lower surface of the crane rails, and a first mounting notch provided at the lower ends of the first lifting rods; a first connecting rod installed in the first installation notch through a hinge pin is arranged between the two first lifting rods on the two detection main bodies, and a second flatness detector is arranged on the first connecting rod.
As a further preferable mode of the utility model, the first detecting piece comprises a second cylinder body penetrating through the middle part of the U-shaped plate body, a second lifting rod penetrating through the second cylinder body and abutting against the lower surface of the crane track, and a second mounting notch arranged at the lower end of the second lifting rod; a second connecting rod installed in the second installation notch through a hinge pin is arranged between the two second lifting rods on the two detection main bodies, and a third flatness detector is arranged on the second connecting rod.
In summary, the utility model has the following beneficial effects:
the detection device provided by the utility model can be used for detecting the flatness of the upper wing plate surface and the lower wing plate surface of the crane track along the length direction of the track, can be used for detecting the upper support type crane track and can also be used for detecting the inverted hanging type crane track, widens the use field of the detection device, and has the advantage of strong practicability.
The detection device provided by the utility model can also detect the flatness of the transverse surface of the lower wing plate at the same longitudinal position, and is more suitable for detecting the inverted crane track.
Drawings
FIG. 1 is a schematic diagram of a single detecting body according to the present utility model in a side view.
Fig. 2 is a schematic cross-sectional view of a single detection body of the present utility model.
Fig. 3 is a schematic diagram showing the position of the detecting body in a side view angle.
Fig. 4 is a schematic partial structure of a second detecting member according to the present utility model.
Fig. 5 is a schematic view of a part of the structure of the clamping structure of the present utility model.
Description of the drawings: a crane track 11, an upper detection structure 1, a lower detection structure 2 and a driving piece 3;
a U-shaped plate 101 and a first detection member 102;
a second cylinder 102a, a second lifting rod 102b, a second mounting notch 102c, and a second link 102d;
a C-shaped plate 201, a second detecting member 202 and a third detecting member 203;
a sleeve 202a, a lifting column 202b, a rail 202c, a sliding rod 202d, a supporting spring 202e, a transmitter 202f, a receiver 202g, and a roller 202h;
a fixed block 203a, a fixed rod 203b, a first cylinder 203c, a first lifting rod 203d, a first mounting notch 203e, and a first link 203f;
a fixed plate 301, a driving wheel 302, a clamping structure 303;
riser 303a, bar-shaped groove 303b, sliding column 303c, moving rod 303d, jack-up spring 303e, pulley 303f.
Detailed Description
The heavy steel factory building crane track detection device provided by the embodiment, as shown in fig. 1-5, comprises two detection bodies arranged on a single crane track 11, wherein each detection body comprises an upper detection structure 1, a lower detection structure 2 and a driving piece 3 for connecting the upper detection structure 1 and the lower detection structure 2; the upper detection structure 1 comprises a U-shaped plate body 101 with a downward opening and a first detection piece 102 arranged on the upper surface of the U-shaped plate body 101; the lower detection structure 2 comprises two C-shaped plate bodies 201 which are respectively positioned on two side surfaces of the crane rail 11 and are provided with openings opposite to each other, and two second detection pieces 202 which are respectively arranged on the two C-shaped plate bodies 201 and are positioned on two sides of the lower surface of the crane rail 11; the driving member 3 includes two fixing plates 301 for connecting the lower ends of the U-shaped plate bodies 101 to the two C-shaped plate bodies 201, respectively, and driving wheels 302 provided on the sides of the fixing plates 301 and slidably connected to the sides of the crane rail 11.
It will be appreciated that at least the driving member 3 is further provided with a power structure for driving the driving wheel 302 to roll. The power structure is referred to the prior art, and will not be described in detail.
It should be noted that, the crane rail 11 refers to i-steel or H-steel commonly used in the prior art, and the lengths of the upper and lower wing plates may be the same or different. Compared with the H-shaped steel with the length of the upper wing plate being smaller than that of the lower wing plate adopted in the crane track disclosed in the comparison document, the detection device provided by the embodiment is more in applicable scene and higher in practicability.
It should be noted that, the detection device provided in this embodiment includes both the upper detection structure 1 and the lower detection structure 2, and this arrangement has the advantages that: firstly, flatness detection can be carried out on the surface of an upper wing plate and the surface of a lower wing plate of the crane track 11 along the length direction of the track, and the method can be used for detecting the track of an upper support type crane (namely, the power structure of the crane is in direct contact with the upper wing plate of the crane track) and can also be used for detecting the track of a reverse hanging type crane (namely, the power structure of the crane is in direct contact with the lower wing plate of the crane track); and secondly, the flatness detection can be carried out on the transverse surface of the lower wing plate at the same longitudinal position, and the method is more suitable for detecting inverted crane tracks.
It should be noted that, in order to reduce friction between the detection device and the crane rail 11, other structures such as the U-shaped plate 101, the C-shaped plate 201 and the fixing plate 301 are not directly connected to the crane rail 11 except that the driving wheel 302 is directly connected to the main body plate of the crane rail.
In this embodiment, the two second detecting members 202 each include a sleeve 202a disposed on an end portion of the lower surface of the C-shaped plate 201, a lifting column 202b penetrating the sleeve 202a and abutting against the lower surface of the crane rail 11, and a roller 202h disposed on the lifting column 202b and slidably connected to the lower surface of the crane rail 11, and a first flatness detector is disposed between the two lifting columns 202b on the two second detecting members 202.
It should be noted that, since the rollers 202h on the two second detecting members 202 are affected by gravity, the rollers 202h are difficult to keep close contact with the lower surface of the crane rail 11, so that the sensitivity of the first flatness detector to the flatness detection of the lower surface of the crane rail is easily reduced. For this reason, the present embodiment further optimizes the second detecting member 202: the two second detecting members 202 further comprise two rails 202c provided on inner walls of both sides of the sleeve 202a, sliding rods 202d provided on both side ends of the lifting column 202b and slidably connected to the rails 202c, and supporting springs 202e provided on upper and lower bottom surfaces of the rails 202c and connected to the sliding rods 202 d. The advantages of this arrangement are that: the roller 202h can be kept in close contact with the lower surface of the crane rail 11 all the time, and thus the change in flatness of the lower surface of the crane rail 11 can be sensitively reflected.
As one preferable example of the present embodiment, two sliding rods 202d on two second detecting members 202, which are close to each other, respectively penetrate the track 202c; the first flatness detector includes a transmitter 202f provided on an end of one of the slide bars 202d, and a receiver 202g provided on an end of the other slide bar 202 d. It will be appreciated that the transmitter 202f refers to a device that will transmit a wireless signal, and the receiver 202g refers to a device that can receive a wireless signal and convert it to a readable or usable signal. In the initial state, the transmitting port of the transmitter 202f is aligned in the horizontal direction with the receiving port of the receiver 202 g; when the detection device detects, the two second detection pieces 202 slide on two ends of the lower wing plate, and due to the fact that the flatness of the surfaces of the two ends of the lower wing plate is different, the positions of the sliding rod 202d in the track 202c are different, the relative positions of the transmitter 202f and the receiver 202g are affected, after the relative positions are changed, the direction and the signal intensity of a signal received by the receiver 202g are possibly changed, the change can be fed back to a worker in a certain conversion mode to obtain data or a chart in a readable mode, and the purpose of flatness detection on the transverse surface of the same longitudinal position of the lower wing plate can be achieved. The structure and principle of the transmitter 202f and the receiver 202g are referred to in the prior art, and will not be described in detail.
In this embodiment, the lower detecting structure 2 further includes a third detecting member 203, where the third detecting member 203 includes a fixed block 203a respectively disposed on the two C-shaped plate bodies 201, a fixed rod 203b with two ends respectively connected to the two fixed blocks 203a and located at the lower end of the crane rail 11, a first cylinder 203C penetrating through the middle of the fixed rod 203b, a first lifting rod 203d penetrating through the first cylinder 203C and abutting against the lower surface of the crane rail 11, and a first mounting notch 203e disposed at the lower end of the first lifting rod 203 d; a first link 203f mounted in the first mounting notch 203e by a hinge pin is provided between the two first lifting/lowering levers 203d on the two detection bodies, and a second flatness detector is provided on the first link 203 f.
In this embodiment, the first detecting member 102 includes a second cylinder 102a penetrating through the middle of the U-shaped plate 101, a second lifting rod 102b penetrating through the second cylinder 102a and abutting against the lower surface of the crane rail 11, and a second mounting notch 102c disposed at the lower end of the second lifting rod 102 b; a second connecting rod 102d installed in the second installation notch 102c through a hinge pin is arranged between the two second lifting rods 102b on the two detection bodies, and a third flatness detector is arranged on the second connecting rod 102 d.
It can be understood that the structures of the third detecting element 203 and the first detecting element 102 are substantially the same as those disclosed in the comparison document CN214372341U, so that the structures of the second flatness detecting element and the third flatness detecting element can directly adopt the structures of the flatness detecting element and the related structures disclosed in the comparison document, and therefore, the description of the embodiment is omitted.
As one preferable example of the present embodiment, the driving part 3 further includes two clamping structures 303 provided at both upper and lower sides of the single fixing plate 301 and respectively connected to upper and lower inner side surfaces of the crane rail 11. The clamping structure 303 is mainly used for keeping the driving member 3 stably and horizontally, so as to avoid the influence of the driving member 3 on the detection result of the flatness of the crane rail 11.
As one preferable example of the present embodiment, the clamping structure 303 includes two opposite risers 303a provided on an upper surface or a lower surface of the fixed plate 301, two bar grooves 303b provided on the two risers 303a, a sliding post 303c provided between the two risers 303a, moving rods 303d provided at both ends of the sliding post 303c and slidably connected to the bar grooves 303b, respectively, and a jack-up spring 303e provided between the two risers 303a and connected to the fixed plate 301 and the sliding post 303c at both ends thereof, respectively, and a pulley 303f is provided on an end of the sliding post 303c remote from the jack-up spring 303 e.
It can be understood that, in order to detect the parallelism between two adjacent crane rails 11, a parallelism detecting member is disposed on two detecting bodies of the two crane rails 11 located at the same end, and the specific structure thereof can also directly refer to the parallelism detecting rod and related structure disclosed in the reference document, so that the description thereof will not be repeated.
The specific embodiments described herein are offered by way of example only to illustrate the spirit of the utility model. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions thereof without departing from the spirit of the utility model or exceeding the scope of the utility model as defined in the accompanying claims.
Claims (9)
1. The heavy steel factory building crane track detection device comprises two detection bodies arranged on a single crane track (11), and is characterized in that the single detection body comprises an upper detection structure (1), a lower detection structure (2) and a driving piece (3) for connecting the upper detection structure (1) and the lower detection structure (2);
the upper detection structure (1) comprises a U-shaped plate body (101) with a downward opening and a first detection piece (102) arranged on the upper surface of the U-shaped plate body (101);
the lower detection structure (2) comprises two C-shaped plate bodies (201) which are respectively positioned on two side surfaces of the crane rail (11) and are provided with openings opposite to each other, and two second detection pieces (202) which are respectively arranged on the two C-shaped plate bodies (201) and are positioned on two sides of the lower surface of the crane rail (11);
the driving piece (3) comprises two fixing plates (301) which enable the lower ends of the U-shaped plate bodies (101) to be connected with the two C-shaped plate bodies (201) respectively, and driving wheels (302) which are arranged on the side faces of the fixing plates (301) and are in sliding connection with the side faces of the crane rails (11).
2. The heavy steel factory building crane rail detection device according to claim 1, wherein the two second detection pieces (202) comprise sleeves (202 a) arranged on the end parts of the lower surface of the C-shaped plate body (201), lifting columns (202 b) penetrating through the sleeves (202 a) and abutting against the lower surface of the crane rail (11), and a first flatness detector is arranged between the two lifting columns (202 b) on the two second detection pieces (202).
3. The crane rail detection device for heavy steel mill houses according to claim 2, wherein the two second detection pieces (202) further comprise two rails (202 c) provided on inner walls of both sides of the sleeve (202 a), sliding rods (202 d) provided on both side ends of the lifting column (202 b) and slidably connected to the inside of the rails (202 c), and supporting springs (202 e) provided on upper and lower bottom surfaces of the rails (202 c) and connected to the sliding rods (202 d).
4. A heavy steel mill house crane rail detection device according to claim 3, characterized in that two sliding rods (202 d) on two second detection pieces (202) close to each other penetrate the rail (202 c) respectively; the first flatness detector includes a transmitter (202 f) provided on an end of one of the slide bars (202 d), and a receiver (202 g) provided on an end of the other slide bar (202 d).
5. The crane rail detection device for heavy steel mill houses according to claim 2, wherein both the second detection members (202) further comprise rollers (202 h) provided on the lifting column (202 b) and slidably connected to the lower surface of the crane rail (11).
6. The crane rail detection apparatus for heavy steel mill houses according to claim 1, wherein the driving member (3) further comprises two clamping structures (303) provided on both upper and lower sides of the single fixing plate (301) and respectively connected to upper and lower inner side surfaces of the crane rail (11).
7. The crane rail detection device for heavy steel houses according to claim 6, wherein the clamping structure (303) comprises two opposite vertical plates (303 a) arranged on the upper surface or the lower surface of the fixed plate (301), two strip-shaped grooves (303 b) respectively arranged on the two vertical plates (303 a), a sliding column (303 c) arranged between the two vertical plates (303 a), moving rods (303 d) arranged at two ends of the sliding column (303 c) and respectively connected with the strip-shaped grooves (303 b), and a jack-up spring (303 e) arranged between the two vertical plates (303 a) and respectively connected with the fixed plate (301) and the sliding column (303 c) at two ends, wherein pulleys (303 f) are arranged at the ends of the sliding column (303 c) far away from the jack-up spring (303 e).
8. The crane rail detection device for the heavy steel mill house according to claim 1, wherein the lower detection structure (2) further comprises a third detection piece (203), the third detection piece (203) comprises fixed blocks (203 a) which are respectively arranged on the two C-shaped plate bodies (201), fixed rods (203 b) with two ends respectively connected with the two fixed blocks (203 a) and positioned at the lower ends of the crane rails (11), a first cylinder body (203C) penetrating through the middle part of the fixed rods (203 b), a first lifting rod (203 d) penetrating through the first cylinder body (203C) and abutting against the lower surface of the crane rails (11), and a first mounting notch (203 e) arranged at the lower ends of the first lifting rods (203 d);
a first connecting rod (203 f) which is installed in the first installation notch (203 e) through a hinge pin is arranged between the two first lifting rods (203 d) on the two detection main bodies, and a second flatness detector is arranged on the first connecting rod (203 f).
9. The heavy steel factory building crane rail detection device according to claim 1, wherein the first detection piece (102) comprises a second cylinder body (102 a) penetrating through the middle of the U-shaped plate body (101), a second lifting rod (102 b) penetrating through the second cylinder body (102 a) and abutting against the lower surface of the crane rail (11), and a second mounting notch (102 c) arranged at the lower end of the second lifting rod (102 b); a second connecting rod (102 d) which is installed in the second installation notch (102 c) through a hinge pin is arranged between the two second lifting rods (102 b) on the two detection main bodies, and a third flatness detector is arranged on the second connecting rod (102 d).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322251353.6U CN220772108U (en) | 2023-08-22 | 2023-08-22 | Crane track detection device for heavy steel factory building |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322251353.6U CN220772108U (en) | 2023-08-22 | 2023-08-22 | Crane track detection device for heavy steel factory building |
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| Publication Number | Publication Date |
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| CN220772108U true CN220772108U (en) | 2024-04-12 |
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| CN202322251353.6U Active CN220772108U (en) | 2023-08-22 | 2023-08-22 | Crane track detection device for heavy steel factory building |
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| CN (1) | CN220772108U (en) |
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- 2023-08-22 CN CN202322251353.6U patent/CN220772108U/en active Active
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