CN114705100B - High range finding wheel of stability - Google Patents
High range finding wheel of stability Download PDFInfo
- Publication number
- CN114705100B CN114705100B CN202210372379.3A CN202210372379A CN114705100B CN 114705100 B CN114705100 B CN 114705100B CN 202210372379 A CN202210372379 A CN 202210372379A CN 114705100 B CN114705100 B CN 114705100B
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- Prior art keywords
- additional
- wheel
- driving shaft
- plate
- transmission gear
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- 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.)
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- 230000005540 biological transmission Effects 0.000 claims abstract description 41
- 230000000670 limiting effect Effects 0.000 claims description 14
- 230000006978 adaptation Effects 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims 1
- 238000005259 measurement Methods 0.000 abstract description 14
- 238000013459 approach Methods 0.000 abstract description 2
- 230000000694 effects Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000013507 mapping Methods 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/0002—Arrangements for supporting, fixing or guiding the measuring instrument or the object to be measured
- G01B5/0009—Guiding surfaces; Arrangements compensating for non-linearity there-of
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B1/00—Cleaning by methods involving the use of tools
- B08B1/10—Cleaning by methods involving the use of tools characterised by the type of cleaning tool
- B08B1/12—Brushes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B1/00—Cleaning by methods involving the use of tools
- B08B1/30—Cleaning by methods involving the use of tools by movement of cleaning members over a surface
- B08B1/32—Cleaning by methods involving the use of tools by movement of cleaning members over a surface using rotary cleaning members
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/02—Measuring arrangements characterised by the use of mechanical techniques for measuring length, width or thickness
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- A Measuring Device Byusing Mechanical Method (AREA)
- Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)
Abstract
The application discloses a high-stability ranging wheel which comprises a supporting rod, wherein one end of the supporting rod is fixedly connected with a handle, the other end of the supporting rod is rotatably connected with a driving shaft, the outer wall of the driving shaft is rotatably connected with a rotating wheel, a counter is further arranged on the supporting rod, the outer wall of the driving shaft is rotatably connected with an additional plate, the driving shaft is provided with a force storage device, the additional plate is rotatably connected with an additional wheel, the rotating wheel is connected with a hairbrush through a transmission device, and the supporting rod is further provided with a fixed assembly. The application rotates the additional plate and approaches the ground, so that the additional wheel and the rotating wheel are positioned on the same straight line during measurement, the additional wheel is always subjected to downward acting force by utilizing the action of the force storage device on the additional plate, the additional wheel is firmly contacted with the ground, the rotating wheel can linearly travel along a given path when being pushed, the problem that the rotating wheel is easy to deflect in angle during independent measurement is solved, and the effect of reducing measurement errors is further achieved.
Description
Technical Field
The application relates to the technical field of surveying and mapping equipment, in particular to a ranging wheel with high stability.
Background
The distance measuring wheel is also called a mechanical distance measuring vehicle, a digital display distance measuring wheel and a measuring wheel, and is widely used for measuring and evaluating construction operations such as professional mapping operations, road engineering, pipeline laying engineering, wire and cable engineering and the like.
The existing ranging wheel is manually supported by a measuring staff and is pushed at a relatively uniform speed when measuring the length of a required distance, wherein a counter on the ranging wheel displays a corresponding value when the wheel rotates for every circle, and finally the circle is multiplied by the circumference of the wheel to obtain the length of the measured distance.
Therefore, the application provides the ranging wheel with high stability.
Disclosure of Invention
The application aims to solve the problem that a numerical value with larger error can be measured in the actual measurement process by using a ranging wheel, and provides the ranging wheel with high stability.
In order to achieve the above purpose, the present application adopts the following technical scheme:
the utility model provides a range finding wheel that stability is high, includes the bracing piece, the one end fixedly connected with handle of bracing piece, the other end rotates and is connected with the driving shaft, the driving shaft outer wall rotates and is connected with the rotation wheel, still be provided with the counter that is used for measuring the rotation wheel rotation number of turns on the bracing piece, the outer wall rotation of driving shaft is connected with the additional board, the driving shaft is kept away from the tip fixedly connected with a plurality of limiting plates of bracing piece, a plurality of the limiting plates are circumference equidistance and arrange on the driving shaft, the sliding ring has been cup jointed on the driving shaft outer wall, set up the spacing groove unanimous with limiting plate adaptation and quantity on the sliding ring, the driving shaft outer wall cover is equipped with the torsional spring, the both ends of torsional spring are connected with sliding ring and additional board respectively, the torsional spring can be applys the effort of accumulating on the additional board, the additional board rotates and is connected with the additional wheel, the diameter of additional wheel is unanimous with the diameter of rotation wheel, the additional wheel is connected with the brush that cleans through transmission, still be provided with fixed subassembly on the bracing piece, fixed subassembly is used for prescribing the position of additional board.
Preferably, the fixed ring has been fixedly sleeved with on the slip ring outer wall, fixedly connected with drum on the one side that the additional board corresponds with the fixed ring, drum inner wall sliding connection has the round bar, the one end that the round bar kept away from the drum is the arc setting, and this tip and fixed ring contact, be provided with reset spring in the drum, reset spring's both ends are connected with drum and round bar respectively.
Preferably, the transmission device comprises a first driven shaft rotationally connected with the additional plate, one end of the first driven shaft is fixedly connected with the additional wheel, the other end of the first driven shaft is fixedly sleeved with a first transmission gear, the additional plate is rotationally connected with a second driven shaft, one end of the second driven shaft is fixedly sleeved with a second transmission gear, the first transmission gear is in meshed connection with the second transmission gear, and the diameter of the first transmission gear is larger than that of the second transmission gear.
Preferably, the end part of the second driven shaft far away from the second transmission gear is fixedly sleeved with a first bevel gear, the additional plate is fixedly connected with a supporting plate, the supporting plate is rotationally connected with a rotating shaft, the end part of the rotating shaft close to the first bevel gear is fixedly sleeved with a second bevel gear, the first bevel gear is in meshed connection with the second bevel gear, the other end of the rotating shaft is fixedly connected with a disc, and the hairbrush is arranged on one side of the disc far away from the second bevel gear.
Preferably, the fixed subassembly is including seting up the thread groove on the bracing piece, thread groove threaded connection has the threaded rod, the one end fixedly connected with knob of threaded rod, set up the slotted hole that corresponds with the threaded rod on the first driven shaft.
Compared with the prior art, the application has the beneficial effects that:
the application rotates the additional plate and approaches the ground, so that the additional wheel and the rotating wheel are positioned on the same straight line during measurement, the additional wheel is always subjected to downward acting force by utilizing the action of the force storage device on the additional plate, the additional wheel is firmly contacted with the ground, the rotating wheel can linearly travel along a given path when being pushed, the problem that the rotating wheel is easy to deflect in angle during independent measurement is solved, and the effect of reducing measurement errors is further achieved.
According to the application, the magnitude of the acting force applied to the additional plate can be determined by rotating the number of turns of the sliding ring, when a measurer with higher height is used, namely, when the deviation angle of the handle and the ground is larger, the smaller acting force is applied at the moment, so that the additional wheel is firmly contacted with the ground, when the measurer with lower height is used, namely, when the deviation angle of the handle and the ground is smaller, the larger acting force is applied at the moment, so that the additional wheel is firmly contacted with the ground, the measurer can adjust according to specific conditions, the measurement requirement is met, the use and operation of the measurer are facilitated, and the use experience of the measurer is improved.
According to the application, when the rotating wheel is pushed, the additional wheel is driven to synchronously rotate, so that the rotating shaft is driven to rotate, the hairbrush rotates, the measuring path and gravel near the path are cleaned to a place far away from the additional wheel, the gravel or other obstacles on the measuring path are prevented from influencing the measurement, and the error in the measurement is reduced.
According to the application, through the arrangement of the threaded rod and the slotted hole, when the measuring instrument is not used, the additional plate can be rotated to be close to the supporting rod, the threaded rod is rotated to enable the threaded rod to enter the slotted hole on the first driven shaft, and at the moment, the additional plate is limited, so that the carrying and the transportation of the measuring instrument are convenient.
Drawings
Fig. 1 is a schematic perspective view of a ranging wheel with high stability in a folded state;
FIG. 2 is an enlarged schematic view of the structure shown at A in FIG. 1;
FIG. 3 is a schematic diagram of a connection structure between an attachment plate and a brush in a high-stability ranging wheel according to the present application;
FIG. 4 is a schematic diagram of a cylinder, a round rod and a return spring in a high-stability ranging wheel according to the present application;
fig. 5 is a schematic perspective view of a ranging wheel with high stability in use according to the present application.
In the figure: 1. a support rod; 2. a handle; 3. a driving shaft; 4. a rotating wheel; 5. an additional plate; 6. an additional wheel; 7. a brush; 8. a limiting plate; 9. a slip ring; 10. a limit groove; 11. a torsion spring; 12. a fixing ring; 13. a cylinder; 14. a round bar; 15. a return spring; 16. a first driven shaft; 17. a first transmission gear; 18. a second driven shaft; 19. a second transmission gear; 20. a first bevel gear; 21. a support plate; 22. a rotating shaft; 23. a second bevel gear; 24. a disc; 25. a threaded rod.
Description of the embodiments
The technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, but not all embodiments, and all other embodiments obtained by those skilled in the art without making creative efforts based on the embodiments of the present application are included in the protection scope of the present application.
Referring to fig. 1-5, a high ranging wheel of stability, including bracing piece 1, the one end fixedly connected with handle 2 of bracing piece 1, the other end rotates and is connected with driving shaft 3, driving shaft 3 outer wall rotates and is connected with rotor 4, still be provided with the counter that is used for measuring rotor 4 rotation number of turns on the bracing piece 1, driving shaft 3 outer wall rotates and is connected with additional board 5, driving shaft 3 keeps away from the tip fixedly connected with a plurality of limiting plates 8 of bracing piece 1, a plurality of limiting plates 8 are circumference equidistance and arrange on driving shaft 3, sliding ring 9 has been cup jointed on driving shaft 3 outer wall, set up on the sliding ring 9 with limiting plate 8 adaptation and the spacing groove 10 of unanimous quantity, driving shaft 3 outer wall cover is equipped with torsional spring 11, torsional spring 11's both ends are connected with sliding ring 9 and additional board 5 respectively, torsional spring 11 can exert the effort of accumulation on additional board 5, additional board 5 rotates and is connected with additional wheel 6, the diameter of additional wheel 6 is unanimous with rotor 4's diameter, additional wheel 6 is connected with brush 7 that cleans through transmission, still be provided with fixed subassembly on the bracing piece 1, fixed subassembly is used for limiting the position of additional board 5.
Referring to fig. 1, the brush 7 is in a shape of a circular truncated cone, so that obstacles such as gravel on a measuring path and around the path can be conveniently cleaned aside, the influence of the obstacles on the rolling of the additional wheel 6 and the rotating wheel 4 is reduced, and the error value of the measuring instrument in the actual road condition measurement is further reduced.
Referring to fig. 2, the limit groove 10 does not extend through the entire sliding ring 9, so that the limit plate 8 may collide with the sliding ring 9 through the corresponding limit groove 10.
Further, a fixed ring 12 is fixedly sleeved on the outer wall of the sliding ring 9, a cylinder 13 is fixedly connected to one side, corresponding to the fixed ring 12, of the additional plate 5, a round rod 14 is slidably connected to the inner wall of the cylinder 13, one end, far away from the cylinder 13, of the round rod 14 is in arc-shaped arrangement, the end is in contact with the fixed ring 12, a reset spring 15 is arranged in the cylinder 13, and two ends of the reset spring 15 are respectively connected with the cylinder 13 and the round rod 14.
Referring to fig. 4, the return spring 15 is always in a compressed state, so that the return spring 15 always applies an elastic force to the round rod 14, and the sliding ring 9 always receives an acting force through the conduction of the fixed ring 12, and the acting force makes the sliding ring 9 always collide with the limiting plate 8 under the condition of not receiving other external forces;
when the auxiliary plate 5 is used, namely when the torsion spring 11 starts to store force, the sliding ring 9 is pushed to the direction close to the auxiliary plate 5 until the limit groove 10 on the sliding ring 9 is separated from the limit plate 8, the sliding ring 9 is rotated to the direction of storing force of the torsion spring 11, the sliding ring 9 is rotated according to the actual supporting condition of a measurer, the sliding ring 9 is kept to move towards the direction of the limit plate 8 under the state of not rotating after the torsion spring 11 stores force until the limit groove 10 on the sliding ring 9 is clamped with the limit plate 8 again, and then the auxiliary plate 5 is also subjected to the acting force of the torsion spring 11 on the auxiliary plate 5.
Further, the transmission device comprises a first driven shaft 16 rotationally connected with the additional plate 5, one end of the first driven shaft 16 is fixedly connected with the additional wheel 6, the other end of the first driven shaft is fixedly sleeved with a first transmission gear 17, the additional plate 5 is rotationally connected with a second driven shaft 18, one end of the second driven shaft 18 is fixedly sleeved with a second transmission gear 19, the first transmission gear 17 is in meshed connection with the second transmission gear 19, and the diameter of the first transmission gear 17 is larger than that of the second transmission gear 19.
Referring to fig. 5, the first transmission gear 17 is engaged with the second transmission gear 19, so that when the additional wheel 6 rolls, the first transmission gear 17 is driven to rotate, and then the second transmission gear 19 is driven to rotate reversely, and meanwhile, the diameter of the first transmission gear 17 is larger than that of the second transmission gear 19, so that the rotation speed of the second transmission gear 19 is larger than that of the first transmission gear 17;
the diameter of the first transmission gear 17 is smaller than the diameter of the additional wheel 6, so that the first transmission gear 17 can prevent the additional wheel 6 and the rotating wheel 4 from rolling when a measurer measures the measurement.
Further, the end part of the second driven shaft 18 far away from the second transmission gear 19 is fixedly sleeved with a first bevel gear 20, the additional plate 5 is fixedly connected with a supporting plate 21, the supporting plate 21 is rotatably connected with a rotating shaft 22, the end part of the rotating shaft 22 close to the first bevel gear 20 is fixedly sleeved with a second bevel gear 23, the first bevel gear 20 is in meshed connection with the second bevel gear 23, the other end of the rotating shaft 22 is fixedly connected with a disc 24, and the hairbrush 7 is arranged on one side of the disc 24 far away from the second bevel gear 23.
Referring to fig. 3, in use, the second transmission gear 19 rotates to drive the second driven shaft 18 to rotate, the first bevel gear 20 to rotate, the second bevel gear 23 to rotate, the rotating shaft 22 to rotate, and then the brush 7 to rotate, so that the brush 7 can conveniently clean obstacles such as gravel on a path to be measured to the side under the condition that the additional wheel 6 and the rotating wheel 4 roll, and a measurer can conveniently use the measuring instrument to measure.
Further, the fixed component comprises a thread groove formed in the support rod 1, the thread groove is in threaded connection with a threaded rod 25, one end of the threaded rod 25 is fixedly connected with a knob, and a slotted hole corresponding to the threaded rod 25 is formed in the first driven shaft 16.
Referring to fig. 1 and 5, fig. 1 shows a part of the structure of the threaded rod 25 extending into the first driven shaft 16, the measuring instrument is in a folded state, fig. 5 shows that the threaded rod 25 does not extend into the first driven shaft 16, and the additional wheel 6 is in contact with the ground, and the measuring instrument is in a usable state, and the direction of the knob is rotated to control whether the threaded rod 25 extends into the first driven shaft 16.
It should be noted that, the rotation connection modes between the structures in the present application all adopt indirect connection modes of the bearings, and the rotation connection modes of the bearings are common knowledge known to those skilled in the art, and are not described herein.
The working principle of the application is as follows:
when a measurer uses the measuring instrument to perform measuring work, the knob is rotated to drive the threaded rod 25 to rotate, the threaded rod 25 is driven to start to be far away from the first driven shaft 16 through the thread groove on the supporting rod 1 until the threaded rod 25 is completely separated from the first driven shaft 16, at the moment, the additional plate 5 starts to rotate, and until the additional wheel 6 and the hairbrush 7 are in contact with the ground, the additional plate 5 stops rotating;
after the relative height of the handle 2 is determined, the force accumulating device starts to be adjusted, the additional plate 5 always receives the elastic force of the torsion spring 11 through the force accumulating of the torsion spring 11 after the sliding ring 9 rotates, the additional plate 5 can transmit an acting force which is always clung to the ground to the additional wheel 6, and the measurer starts to push the measuring instrument;
the measurer pushes to drive the rotating wheel 4 and the additional wheel 6 to synchronously rotate in the same direction, so that a counter on the supporting rod 1 records the number of rotation turns of the rotating wheel 4 and simultaneously drives the hairbrush 7 to rotate at a high speed to clean obstacles affecting measurement, such as gravel on a measured path;
after the measurement is finished, a reset key of the counter is pressed down, the number on the counter is cleared, then the additional plate 5 is rotated, so that the additional plate 5 is close to the supporting rod 1, until a slotted hole on the first driven shaft 16 is opposite to the threaded rod 25, the knob is rotated, the threaded rod 25 is driven to be close to the first driven shaft 16, finally, the threaded rod enters the slotted hole, at the moment, a limiting effect is generated on the additional plate 5, the additional plate 5 and a structure connected with the additional plate 5 are folded, and the measuring instrument is in a folded state.
The foregoing is only a preferred embodiment of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art, who is within the scope of the present application, should make equivalent substitutions or modifications according to the technical scheme of the present application and the inventive concept thereof, and should be covered by the scope of the present application.
Claims (5)
1. The utility model provides a range finding wheel that stability is high, its characterized in that, including bracing piece (1), the one end fixedly connected with handle (2) of bracing piece (1), the other end rotates and is connected with driving shaft (3), driving shaft (3) outer wall rotation is connected with rotor (4), still be provided with the counter that is used for measuring rotor (4) rotation number on bracing piece (1), driving shaft (3) outer wall rotation is connected with additional board (5), driving shaft (3) keep away from tip fixedly connected with a plurality of limiting plates (8) of bracing piece (1), a plurality of limiting plates (8) are circumference equidistance on driving shaft (3) and arrange, sliding ring (9) have been cup jointed on driving shaft (3) outer wall, sliding ring (9) are gone up and are seted up with limiting plate (8) adaptation and quantity unanimous spacing groove (10), driving shaft (3) outer wall cover is equipped with torsional spring (11), the both ends of torsional spring (11) are connected with sliding ring (9) and additional board (5) respectively, torsional spring (11) can apply the additional effort of accumulating on additional board (5) on additional board (6) rotation diameter (6) and additional wheel (6), the additional wheel (6) is connected with a brush (7) for cleaning through a transmission device, and the support rod (1) is also provided with a fixing component which is used for limiting the orientation of the additional plate (5).
2. The high-stability ranging wheel according to claim 1, wherein a fixed ring (12) is fixedly sleeved on the outer wall of the sliding ring (9), a cylinder (13) is fixedly connected on one side, corresponding to the fixed ring (12), of the additional plate (5), a round rod (14) is slidably connected to the inner wall of the cylinder (13), one end, far away from the cylinder (13), of the round rod (14) is in an arc-shaped arrangement, the end is in contact with the fixed ring (12), a reset spring (15) is arranged in the cylinder (13), and two ends of the reset spring (15) are respectively connected with the cylinder (13) and the round rod (14).
3. A high stability ranging wheel according to claim 1, characterized in that the transmission comprises a first driven shaft (16) rotationally connected with the additional plate (5), one end of the first driven shaft (16) is fixedly connected with the additional wheel (6), the other end is fixedly sleeved with a first transmission gear (17), the additional plate (5) is rotationally connected with a second driven shaft (18), one end of the second driven shaft (18) is fixedly sleeved with a second transmission gear (19), the first transmission gear (17) is in meshed connection with the second transmission gear (19), and the diameter of the first transmission gear (17) is larger than that of the second transmission gear (19).
4. A high stability ranging wheel according to claim 3, characterized in that the end of the second driven shaft (18) far away from the second transmission gear (19) is fixedly sleeved with a first bevel gear (20), the additional plate (5) is fixedly connected with a supporting plate (21), the supporting plate (21) is rotationally connected with a rotating shaft (22), the end of the rotating shaft (22) near the first bevel gear (20) is fixedly sleeved with a second bevel gear (23), the first bevel gear (20) is in meshed connection with the second bevel gear (23), the other end of the rotating shaft (22) is fixedly connected with a disc (24), and the brush (7) is arranged on one side of the disc (24) far away from the second bevel gear (23).
5. A ranging wheel with high stability according to claim 3, characterized in that the fixing component comprises a thread groove formed on the supporting rod (1), the thread groove is in threaded connection with a threaded rod (25), one end of the threaded rod (25) is fixedly connected with a knob, and a slotted hole corresponding to the threaded rod (25) is formed in the first driven shaft (16).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210372379.3A CN114705100B (en) | 2022-04-11 | 2022-04-11 | High range finding wheel of stability |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210372379.3A CN114705100B (en) | 2022-04-11 | 2022-04-11 | High range finding wheel of stability |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114705100A CN114705100A (en) | 2022-07-05 |
| CN114705100B true CN114705100B (en) | 2023-08-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210372379.3A Active CN114705100B (en) | 2022-04-11 | 2022-04-11 | High range finding wheel of stability |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114705100B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117870505B (en) * | 2024-03-11 | 2024-05-10 | 山东华地测绘地理信息有限公司 | Distance measuring device suitable for many topography |
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| JP3488200B2 (en) * | 2000-12-20 | 2004-01-19 | 株式会社サントップテクノ | Traveling road surface shape measuring device |
| US8479407B2 (en) * | 2010-08-25 | 2013-07-09 | Keson Industries, Inc. | Distance measuring wheel with foot actuated reset |
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| CN2715108Y (en) * | 2004-03-30 | 2005-08-03 | 李东远 | A distance meter |
| CN108662965A (en) * | 2018-04-28 | 2018-10-16 | 孝感市奇思妙想文化传媒有限公司 | A kind of idler wheel measuring device |
| CN209802334U (en) * | 2019-06-10 | 2019-12-17 | 中图测绘技术(杭州)有限公司 | handheld wheeled distancer |
| CN212082209U (en) * | 2020-05-27 | 2020-12-04 | 鹿其涛 | Special measuring tool for engineering audit |
| CN215832689U (en) * | 2021-08-19 | 2022-02-15 | 林燕华 | Engineering cost on-site measuring device |
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| CN114705100A (en) | 2022-07-05 |
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