CN216128168U - Rail surface positioning device for measuring ballast track contact net - Google Patents
Rail surface positioning device for measuring ballast track contact net Download PDFInfo
- Publication number
- CN216128168U CN216128168U CN202122890080.0U CN202122890080U CN216128168U CN 216128168 U CN216128168 U CN 216128168U CN 202122890080 U CN202122890080 U CN 202122890080U CN 216128168 U CN216128168 U CN 216128168U
- Authority
- CN
- China
- Prior art keywords
- rail surface
- scissor
- bottom plate
- arm
- surface positioning
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- A Measuring Device Byusing Mechanical Method (AREA)
Abstract
The utility model particularly relates to a rail surface positioning device for measuring a ballast track contact net, which solves the problem of large measurement error caused by the fact that the actual rail surface height of a track is not consistent with the designed rail surface height during the existing catenary height measurement. A rail surface positioning device for measurement of a ballast track contact net comprises a bottom plate, wherein a scissor-type lifting frame is arranged on the upper surface of the bottom plate, and a rail surface positioning plate which is parallel to the bottom plate and the right part of which extends out of the bottom plate is arranged at the top end part of the scissor-type lifting frame; a driving mechanism for driving the scissor type lifting frame to lift is arranged beside the scissor type lifting frame; the right-hand edge of cutting fork crane is vertical to be provided with the telescopic scale that is located rail surface locating plate front side, and the bottom of scale articulates in the bottom plate. The utility model realizes the purpose of positioning the design height of the rail surface of the steel rail, has high positioning precision, improves the measurement precision of the height of the catenary, greatly reduces the workload of later adjustment of the catenary, and is suitable for measuring the height of the catenary in the measurement of the catenary.
Description
Technical Field
The utility model relates to a positioning device for high-speed rail construction, in particular to a rail surface positioning device for measuring a ballast track contact net.
Background
In the construction standard of the electrified railway, particularly in the route standard of designing the speed per hour of 300km-350km, the requirement on the precision of the suspension height of the contact network is high, the dropper adopts an integral non-adjustable dropper, and the calculation of the dropper is mostly completed by adopting calculation software. The factors influencing the calculation accuracy of the dropper are more, and the factors mainly comprise line parameters, wrist-arm deflection, pull-out values, carrier cable height and the like. The catenary height, i.e., the vertical distance of the catenary from the rail surface of the track, is obtained by field measurements.
However, practice has shown that the following problems exist in the measurement of the height of the existing catenary: because the laying fine adjustment of the ballast track usually lags behind the installation construction of the upper structure of the contact network, the track can not reach the design standard before the construction of the upper structure of the contact network, so that errors exist in the height of the catenary measured under the condition that various parameters of the track surface are not in place, the actual height of the contact network and the design of the dropper can not meet the acceptance standard or can not meet the design requirement after the fine adjustment of the line is completed, and the later adjustment workload of the contact network is large. Therefore, the rail surface positioning device for measuring the ballast track contact network is needed to be invented, and the rail surface of the track is positioned to the design height, so that the influence caused by the fact that the rail surface of the track is not in place is eliminated.
SUMMERY OF THE UTILITY MODEL
The utility model provides a rail surface positioning device for measuring a ballast track contact net, aiming at solving the problem of large measurement error caused by the fact that the actual rail surface height of a track is not consistent with the designed rail surface height during the existing catenary height measurement.
The utility model is realized by adopting the following technical scheme:
a rail surface positioning device for measurement of a ballast track contact net comprises a bottom plate, wherein a scissor-type lifting frame is arranged on the upper surface of the bottom plate, and a rail surface positioning plate which is parallel to the bottom plate and the right part of which extends out of the bottom plate is arranged at the top end part of the scissor-type lifting frame; a driving mechanism for driving the scissor type lifting frame to lift is arranged beside the scissor type lifting frame; the right-hand edge of cutting fork crane is vertical to be provided with the telescopic scale that is located rail surface locating plate front side, and the bottom of scale articulates in the bottom plate.
Furthermore, the scissor type lifting frame comprises two scissor type supports which are distributed in parallel from front to back and two longitudinal pivots which are distributed from left to right; the scissor fork support comprises an I scissor arm and an II scissor arm, the top end part of the I scissor arm is hinged to the lower surface of the rail surface positioning plate, and the bottom end part of the I scissor arm is hinged to the upper surface of the bottom plate; the top end part of the second shear arm is in sliding contact with the lower surface of the rail surface positioning plate, and the bottom end part of the second shear arm is in sliding contact with the upper surface of the bottom plate; the first shearing arm and the second shearing arm are both two-section shearing arms; the arm rod of the first shear arm is hinged through a longitudinal pivot positioned on the right side; the arm lever of the second scissor arm is hinged through a longitudinal pivot on the left side.
Furthermore, the driving mechanism is a transversely-placed adjusting screw rod arranged between the two scissor brackets, and the left part of the adjusting screw rod is in threaded connection with a longitudinal pivot positioned on the left side; the right part of the adjusting screw is in threaded connection with a longitudinal pivot on the right side; the thread direction of the left part of the adjusting screw is opposite to that of the right part of the adjusting screw; the left end part of the adjusting screw is fixedly sleeved with a cylindrical adjusting block.
Further, the driving mechanism comprises a telescopic hydraulic cylinder and a hydraulic pump communicated with the telescopic hydraulic cylinder; the hydraulic pump is a manual hydraulic pump; the telescopic hydraulic cylinder is arranged between the two scissor brackets, and the bottom of the base of the telescopic hydraulic cylinder is hinged to the upper surface of the bottom plate through a hinge seat; the connecting rod is fixedly connected between the two scissor brackets, and the middle part of the connecting rod is rotatably sleeved at the top end part of a piston rod of the telescopic hydraulic cylinder.
Furthermore, the graduated scale comprises a hollow lower scale barrel positioned at the lower side and an upper scale plate sleeved with the lower scale barrel; the front outer side wall of the lower ruler barrel and the front side wall of the upper ruler plate are provided with scale grooves; the rear side wall of the lower ruler barrel is screwed with a locking nut of which the tail end part is abutted against the upper ruler plate.
Furthermore, the bottom of the lower ruler barrel is hinged to the bottom plate through a damping rotating shaft.
Furthermore, the I-th shearing arm is hinged with the rail surface positioning plate and the I-th shearing arm is hinged with the bottom plate through a hinge base I.
Further, the thickness of the rail surface positioning plate is 1 mm.
The rail surface positioning plate has the advantages of reasonable and reliable structural design, realization of the purpose of positioning the design height of the rail surface of the steel rail, stable ascending of the rail surface positioning plate, controllable ascending height, effective improvement of high positioning precision, further improvement of the measurement precision of the height of the catenary cable, substantial reduction of the workload of later adjustment of the catenary system, labor and time saving, controllable ascending speed of the rail surface positioning plate, convenient adjustment and operation, increased operation convenience in positioning, effective improvement of positioning efficiency, convenient storage and strong practicability, and is suitable for the measurement of the height of the catenary cable in the catenary system measurement.
Drawings
FIG. 1 is a schematic view of the present invention with the drive mechanism being an adjusting screw;
FIG. 2 is a schematic side view of FIG. 1;
FIG. 3 is a reference view showing a state in which the driving mechanism is an adjusting screw in the present invention;
FIG. 4 is a schematic top view of FIG. 3;
FIG. 5 is a schematic view of the present invention when the driving mechanism is a telescopic hydraulic cylinder;
FIG. 6 is a reference view showing a state in which the driving mechanism of the present invention is a telescopic hydraulic cylinder;
FIG. 7 is a schematic view of the construction of a scissors assembly of the present invention;
FIG. 8 is a schematic view of the construction of the adjusting screw of the present invention;
figure 9 is a schematic view of the construction of a scale according to the present invention.
In the figure, 1-bottom plate, 2-rail surface positioning plate, 3-graduated scale, 301-lower scale barrel, 302-upper scale plate, 303-graduated groove, 304-damping rotating shaft, 4-longitudinal pivot, 501-first shearing arm, 502-second shearing arm, 503-hinged base I, 6-adjusting screw rod, 7-adjusting block, 8-telescopic hydraulic cylinder, 9-hydraulic pump, 10-connecting rod and 11-steel rail.
Detailed Description
Example 1
A rail surface positioning device for measurement of a ballast track contact network is shown in attached figures 1-4 and comprises a bottom plate 1, wherein a scissor type lifting frame is arranged on the upper surface of the bottom plate 1, and a rail surface positioning plate 2 which is parallel to the bottom plate 1 and the right part of which extends out of the bottom plate 1 is arranged at the top end part of the scissor type lifting frame; a driving mechanism for driving the scissor type lifting frame to lift is arranged beside the scissor type lifting frame; the right-hand edge of cutting fork crane is vertical to be provided with the telescopic scale 3 that is located 2 front sides of rail surface locating plate, and the bottom of scale 3 articulates in bottom plate 1.
According to the utility model, the rail surface positioning plate 2 is lifted to the designed height of the rail surface of the steel rail 11, so that the purpose of positioning the rail surface of the steel rail 11 is realized; the combined structure design of the scissor-fork type lifting frame and the driving mechanism can drive the rail surface positioning plate 2 to move upwards, so that the aim of lifting the rail surface positioning plate 2 is fulfilled; the lifting height of the rail surface positioning plate 2 can be measured by the structural design of the graduated scale 3, and the positioning precision is increased.
When the device works, firstly, a GPS measuring instrument is used for measuring the height of the rail surface of the steel rail 11, and the measured value is compared with the designed height value of the rail surface of the steel rail 11 to obtain the height value of the rail surface of the steel rail 11 needing to be lifted; then, the rail surface positioning device is placed beside the steel rail 11, so that the lower surface of the rail surface positioning plate 2 is attached to the rail top of the steel rail 11, is close to the steel rail 11 as much as possible when placed, and is stably placed; then, the length of the graduated scale 3 is adjusted, so that the graduated scale 3 can indicate the designed height of the rail surface of the steel rail 11 and mark the rail surface, then the height of the scissor-fork type lifting frame is slowly lifted through the driving mechanism, the scissor-fork type lifting frame is lifted to drive the rail surface positioning plate 2 to move upwards until the rail surface positioning plate 2 is flush with the designed height of the rail surface of the steel rail 11, and therefore the positioning of the designed rail surface of the steel rail 11 is achieved; when the rail surfaces of the two steel rails 11 are positioned to the design height, the height of the rail surface of the rail reaches the design height, and then the height of the catenary cable can be measured, so that the problem of large measurement error caused by the fact that the actual rail surface height of the rail is not consistent with the height of the design rail surface in the existing height measurement of the catenary cable is solved.
As shown in the attached drawings 1, 3 and 7, the scissor type lifting frame comprises two scissor brackets which are distributed in parallel front and back and two longitudinal pivots 4 which are distributed left and right; the scissor bracket comprises an I-shaped scissor arm 501 and an II-shaped scissor arm 502, the top end part of the I-shaped scissor arm 501 is hinged to the lower surface of the rail surface positioning plate 2, and the bottom end part of the I-shaped scissor arm 501 is hinged to the upper surface of the bottom plate 1; the top end part of the second shearing arm 502 is in sliding contact with the lower surface of the rail surface positioning plate 2, and the bottom end part is in sliding contact with the upper surface of the bottom plate 1; the first shearing arm 501 and the second shearing arm 502 are both two-segment shearing arms; the arm lever of the I-shaped shear arm 501 is hinged through a longitudinal pivot 4 positioned on the right side; the arm lever of the second II scissor arm 502 is articulated by a longitudinal pivot 4 located on the left side.
This structural design makes rail surface locating plate 2 parallel with bottom plate 1 all the time at the lifting in-process, has realized parallel, the stable rising of rail surface locating plate 2, has further improved this positioner's positioning accuracy.
As shown in fig. 1, fig. 2, fig. 3, fig. 4, and fig. 8, the driving mechanism is a transversely-placed adjusting screw 6 disposed between the two scissor brackets, and the left portion of the adjusting screw 6 is in threaded connection with the longitudinal pivot 4 located on the left side; the right part of the adjusting screw 6 is in threaded connection with the longitudinal pivot 4 on the right side; the thread direction of the left part of the adjusting screw rod 6 is opposite to that of the right part of the adjusting screw rod 6; the left end part of the adjusting screw 6 is fixedly sleeved with a cylindrical adjusting block 7.
During operation, the operator rotates the adjusting block 7 to drive the adjusting screw 6 to rotate, so that the distance between the two longitudinal pivots 4 is shortened, the opening and closing degree of the two scissor brackets is changed while the distance between the longitudinal pivots 4 is shortened, and the purpose of lifting the rail surface positioning plate 2 is achieved. This structural design makes rail surface locating plate 2 can steadily, rise in succession, and the rising speed is adjustable, has increased the simple operation nature when this positioner uses.
As shown in fig. 1, fig. 2, fig. 3 and fig. 9, the graduated scale 3 includes a hollow lower scale barrel 301 located at the lower side and an upper scale plate 302 sleeved with the lower scale barrel 301; the front outer side wall of the lower ruler barrel 301 and the front side wall of the upper ruler plate 302 are provided with scale grooves 303; the rear side wall of lower blade barrel 301 is screwed with a locking nut whose tail end abuts against upper blade plate 302.
This structural design has realized the scalable function of scale 3, and has made the length lockable of scale 3, has further promoted this positioner's structural reliability.
As shown in fig. 1, fig. 3 and fig. 9, the bottom of the lower ruler barrel 301 is hinged to the bottom plate 1 through a damping rotating shaft 304.
This structural design firstly makes scale 3 can be stably upright when using, has further guaranteed positioning accuracy, secondly withdraws scale 3 after the use is accomplished, has increased this positioner's the performance of accomodating.
As shown in fig. 1, fig. 2, fig. 3, and fig. 7, the I-th scissor arm 501 is hinged to the rail surface positioning plate 2, and the I-th scissor arm 501 is hinged to the bottom plate 1 through a hinge base I503.
The thickness of the rail surface positioning plate 2 is 1 mm.
This structural design makes the error that brings by rail face locating plate 2 controllable in location, the measurement process, has further improved this positioner's positioning accuracy, and then has guaranteed the accuracy of carrier cable height measurement.
Example 2
A rail surface positioning device for measurement of a ballast track contact network is shown in attached figures 5 and 6 and comprises a bottom plate 1, wherein a scissor type lifting frame is arranged on the upper surface of the bottom plate 1, and a rail surface positioning plate 2 which is parallel to the bottom plate 1 and the right part of which extends out of the bottom plate 1 is arranged at the top end part of the scissor type lifting frame; a driving mechanism for driving the scissor type lifting frame to lift is arranged beside the scissor type lifting frame; the right-hand edge of cutting fork crane is vertical to be provided with the telescopic scale 3 that is located 2 front sides of rail surface locating plate, and the bottom of scale 3 articulates in bottom plate 1.
As shown in fig. 5, 6 and 7, the scissor type lifting frame comprises two scissor type brackets which are distributed in parallel front and back and two longitudinal pivots 4 which are distributed left and right; the scissor bracket comprises an I-shaped scissor arm 501 and an II-shaped scissor arm 502, the top end part of the I-shaped scissor arm 501 is hinged to the lower surface of the rail surface positioning plate 2, and the bottom end part of the I-shaped scissor arm 501 is hinged to the upper surface of the bottom plate 1; the top end part of the second shearing arm 502 is in sliding contact with the lower surface of the rail surface positioning plate 2, and the bottom end part is in sliding contact with the upper surface of the bottom plate 1; the first shearing arm 501 and the second shearing arm 502 are both two-segment shearing arms; the arm lever of the I-shaped shear arm 501 is hinged through a longitudinal pivot 4 positioned on the right side; the arm lever of the second II scissor arm 502 is articulated by a longitudinal pivot 4 located on the left side.
As shown in fig. 5 and 6, the driving mechanism comprises a telescopic hydraulic cylinder 8 and a hydraulic pump 9 communicated with the telescopic hydraulic cylinder 8; the hydraulic pump 9 is a manual hydraulic pump; the telescopic hydraulic cylinder 8 is arranged between the two scissor brackets, and the bottom of the base of the telescopic hydraulic cylinder 8 is hinged to the upper surface of the bottom plate 1 through a hinge seat; a connecting rod 10 is fixedly connected between the two scissor brackets, and the top end part of a piston rod of the telescopic hydraulic cylinder 8 is rotatably sleeved in the middle of the connecting rod 10.
During operation, the operating personnel rotates the rocker of hydraulic pump 9, drives telescopic hydraulic cylinder 8's piston rod extension, and then drives connecting rod 10 rebound, and two degrees of opening and shutting of cutting the fork support change when connecting rod 10 rebound, realize the purpose of lifting rail surface locating plate 2 from this. This structural design makes rail surface locating plate 2 can steadily, rise in succession, and the rising speed is adjustable, has increased the simple operation nature when this positioner uses.
As shown in fig. 5, 6 and 9, the graduated scale 3 includes a hollow lower cylinder 301 at the lower side and an upper plate 302 sleeved with the lower cylinder 301; the front outer side wall of the lower ruler barrel 301 and the front side wall of the upper ruler plate 302 are provided with scale grooves 303; the rear side wall of lower blade barrel 301 is screwed with a locking nut whose tail end abuts against upper blade plate 302.
As shown in fig. 5, 6 and 9, the bottom of the lower ruler barrel 301 is hinged to the bottom plate 1 through a damping rotating shaft 304.
As shown in fig. 5, 6 and 7, the first shearing arm 501 is hinged to the rail surface positioning plate 2, and the first shearing arm 501 is hinged to the bottom plate 1 through a hinge base I503.
The thickness of the rail surface positioning plate 2 is 1 mm.
In a specific implementation process, the distance between two adjacent scale grooves 303 is 1 mm.
Claims (8)
1. The utility model provides a there is rail face positioner of tiny fragments of stone, coal, etc. track contact net measuring usefulness which characterized in that: the device comprises a bottom plate (1), wherein a scissor type lifting frame is arranged on the upper surface of the bottom plate (1), and a rail surface positioning plate (2) which is parallel to the bottom plate (1) and the right part of which extends out of the bottom plate (1) is arranged at the top end part of the scissor type lifting frame; a driving mechanism for driving the scissor type lifting frame to lift is arranged beside the scissor type lifting frame; the right-hand edge of the scissor type lifting frame is vertically provided with a telescopic graduated scale (3) which is positioned on the front side of the rail surface positioning plate (2), and the bottom of the graduated scale (3) is hinged to the bottom plate (1).
2. The rail surface positioning device for measuring the ballast track overhead line system according to claim 1, wherein: the scissor type lifting frame comprises two scissor type brackets which are distributed in parallel front and back and two longitudinal pivots (4) which are distributed left and right; the scissor bracket comprises an I-shaped scissor arm (501) and an II-shaped scissor arm (502), the top end part of the I-shaped scissor arm (501) is hinged to the lower surface of the rail surface positioning plate (2), and the bottom end part of the I-shaped scissor arm is hinged to the upper surface of the bottom plate (1); the top end part of the II-th shear arm (502) is in sliding contact with the lower surface of the rail surface positioning plate (2), and the bottom end part is in sliding contact with the upper surface of the bottom plate (1); the first shearing arm (501) and the second shearing arm (502) are both two-section shearing arms; the arm lever of the I-shaped shear arm (501) is hinged through a longitudinal pivot (4) positioned on the right side; the arm lever of the II shear arm (502) is hinged by a longitudinal pivot (4) on the left side.
3. The rail surface positioning device for measuring the ballast track overhead line system of claim 2, characterized in that: the driving mechanism is a transversely-placed adjusting screw rod (6) arranged between the two scissor brackets, and the left part of the adjusting screw rod (6) is in threaded connection with a longitudinal pivot (4) positioned on the left side; the right part of the adjusting screw rod (6) is in threaded connection with the longitudinal pivot (4) on the right side; the thread direction of the left part of the adjusting screw rod (6) is opposite to the thread direction of the right part of the adjusting screw rod (6); the left end part of the adjusting screw rod (6) is fixedly sleeved with a cylindrical adjusting block (7).
4. The rail surface positioning device for measuring the ballast track overhead line system of claim 2, characterized in that: the driving mechanism comprises a telescopic hydraulic cylinder (8) and a hydraulic pump (9) communicated with the telescopic hydraulic cylinder (8); the hydraulic pump (9) is a manual hydraulic pump; the telescopic hydraulic cylinder (8) is arranged between the two scissor brackets, and the bottom of the base of the telescopic hydraulic cylinder (8) is hinged to the upper surface of the bottom plate (1) through a hinge seat; a connecting rod (10) is fixedly connected between the two scissor brackets, and the top end part of a piston rod of the telescopic hydraulic cylinder (8) is rotatably sleeved in the middle of the connecting rod (10).
5. The rail surface positioning device for measuring the ballast track overhead line system according to claim 3 or 4, wherein: the graduated scale (3) comprises a hollow lower scale barrel (301) positioned at the lower side and an upper scale plate (302) sleeved with the lower scale barrel (301); the front outer side wall of the lower ruler barrel (301) and the front side wall of the upper ruler plate (302) are both provided with scale grooves (303); the rear side wall of the lower ruler barrel (301) is screwed with a locking nut of which the tail end part is abutted against the upper ruler plate (302).
6. The rail surface positioning device for measuring the ballast track overhead line system according to claim 5, wherein: the bottom of the lower ruler barrel (301) is hinged to the bottom plate (1) through a damping rotating shaft (304).
7. The rail surface positioning device for measuring the ballast track overhead line system of claim 2, characterized in that: the first shearing arm (501) is hinged with the rail surface positioning plate (2) and the first shearing arm (501) is hinged with the bottom plate (1) through a hinge base I (503).
8. The rail surface positioning device for measuring the ballast track overhead line system according to claim 1, wherein: the thickness of the rail surface positioning plate (2) is 1 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122890080.0U CN216128168U (en) | 2021-11-24 | 2021-11-24 | Rail surface positioning device for measuring ballast track contact net |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122890080.0U CN216128168U (en) | 2021-11-24 | 2021-11-24 | Rail surface positioning device for measuring ballast track contact net |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216128168U true CN216128168U (en) | 2022-03-25 |
Family
ID=80779192
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122890080.0U Active CN216128168U (en) | 2021-11-24 | 2021-11-24 | Rail surface positioning device for measuring ballast track contact net |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216128168U (en) |
-
2021
- 2021-11-24 CN CN202122890080.0U patent/CN216128168U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN210828313U (en) | Building aluminum mould template support of adjustable installation | |
| CN111350927A (en) | Distance measuring device for hoisting truss | |
| CN216128168U (en) | Rail surface positioning device for measuring ballast track contact net | |
| CN114136199A (en) | High-precision method for measuring height of carrier cable of ballast track | |
| CN103439124B (en) | Railway vehicle bogie static load test bench closed-frame charger | |
| CN201901824U (en) | Positioning adjuster for ballastless track slab | |
| CN218937276U (en) | Engineering geological crack measuring device | |
| CN206616501U (en) | Sucker lifting and swinging mechanism | |
| CN210486903U (en) | Vertical measuring device for building construction | |
| CN213686033U (en) | Gear roughness measurement instrument fixed bolster | |
| CN114232513A (en) | Variable-angle inclined-climbing type hanging basket middle cross beam adjusting device | |
| CN212300299U (en) | Gauge measuring device with marking function for subway construction | |
| CN211103943U (en) | Line drawing device for FFC cable | |
| CN204096971U (en) | Fine-tuning hoisting crane turning unit positioning linkages | |
| CN208663729U (en) | A kind of fan leaf fork angle regulating equipment | |
| CN101949483B (en) | Penetrometer positioning bracket | |
| CN217762821U (en) | Micro-hole diffraction light spot measuring device | |
| CN208026241U (en) | Lithosomic body height measuring gauge and lithosomic body height measuring device | |
| CN220416714U (en) | Surveying and mapping device convenient to stable installation | |
| CN212226568U (en) | Distance measuring device for hoisting truss | |
| CN213226639U (en) | Line scribing device for production and processing of wood ruler | |
| CN205277319U (en) | Adjustable angle water bores support | |
| CN220289936U (en) | Glued prism group | |
| CN219714299U (en) | Size detection device | |
| CN210605150U (en) | Optical pitching adjusting device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |