CN107268444A - A kind of municipal construction road and bridge device for dotting - Google Patents
A kind of municipal construction road and bridge device for dotting Download PDFInfo
- Publication number
- CN107268444A CN107268444A CN201710563449.2A CN201710563449A CN107268444A CN 107268444 A CN107268444 A CN 107268444A CN 201710563449 A CN201710563449 A CN 201710563449A CN 107268444 A CN107268444 A CN 107268444A
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- Prior art keywords
- ready
- dotting
- wheel body
- housing
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- 238000010276 construction Methods 0.000 title claims abstract description 19
- 239000000523 sample Substances 0.000 claims abstract description 12
- 230000005540 biological transmission Effects 0.000 claims abstract description 11
- 238000003756 stirring Methods 0.000 claims abstract description 7
- 230000000452 restraining effect Effects 0.000 claims description 3
- 230000001429 stepping effect Effects 0.000 description 13
- 230000033001 locomotion Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25H—WORKSHOP EQUIPMENT, e.g. FOR MARKING-OUT WORK; STORAGE MEANS FOR WORKSHOPS
- B25H7/00—Marking-out or setting-out work
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Rehabilitation Tools (AREA)
Abstract
The present invention relates to a kind of municipal construction road and bridge device for dotting, including housing, road wheel, driving wheel, transmission drum, driven pulley, device for dotting；The housing is hollow rectangle shape, and the housing lower surface is provided with walking hole, and the housing lower surface, which is located to be provided with the right side of walking hole, gets hole ready；The road wheel includes live axle, walking wheel body, first gear；The driving wheel includes drive sprocket axle, active wheel body, second gear；The transmission drum includes inclined ramp, the first dop, one-level screw rod, one-level nut, two grades of nuts, two grades of screw rods；The driven pulley includes follower shaft, driven wheel body, stirs inserted link；The device for dotting includes getting rotating shaft ready, getting cross bar ready, get probe ready.The adjustable integral point space type device for dotting is simple to operate, gently promotes device for dotting to cause the road wheel is rotated to can be achieved to get operation ready；The regulation of spacing can also be got ready by rotating the first nut, the realization of the second nut.
Description
Technical field
The present invention relates to technical field of municipal construction, and in particular to a kind of municipal construction road and bridge device for dotting.
Background technology
At present, in municipal construction road and bridge reinforcing steel bar laying spacing, prior art be typically all by workman take scale
Sign or unwrapping wire are determined manually.So, it is random and time-consuming due to what is indicated manually, the quality of construction is not only influenceed,
The progress of construction is also affected, and increases and is constructed into.
Applying date 2013.03.18, the patent of application number 201310084749.4 discloses a kind of construction reinforcing bar of knowing clearly
Spacing marking device, it includes the road wheel for the hand-held promotion of a frame being made up of push rod, support, wheel rim, spoke and wheel shaft, its feature
It is on wheel rim, by away from provided with getting pen ready, print cartridge to be provided with support, during wheel rim rolls walking, getting ready thereon
The black contact one side inking of leaching of the pen by contacting print cartridge is while get sign ready.
But above-mentioned patent still suffers from problems with：It is unable to the point spacing that accurate adjustment is got ready, it is impossible to adapt to different apply
Work environment.
The content of the invention
In order to solve technical problem present in background technology, the present invention provides a kind of municipal construction and got ready with road and bridge
Device, it is simple to operate, the device for dotting is placed on to the construction part for needing to get ready, then gently promotes device for dotting to cause institute
Road wheel rotation is stated to can be achieved to get operation ready；The tune of spacing can also be got ready by rotating the first nut, the realization of the second nut
Section.
The technical solution adopted for the present invention to solve the technical problems is：
A kind of municipal construction road and bridge device for dotting, is got ready, institute using a kind of adjustable integral point space type device for dotting
Stating adjustable integral point space type device for dotting includes housing, road wheel, driving wheel, transmission drum, driven pulley, device for dotting；
The housing is hollow rectangle shape, and the housing right side wall is detachably connected by fixing bolt, under the housing
End face is provided with walking hole, and the housing lower surface, which is located to be provided with the right side of walking hole, gets hole ready；
The road wheel includes：
Live axle, is located on the inside of the housing right side wall in left-right direction；
Walking wheel body, is rotatably set on the live axle, and the walking wheel body lower end passes through walking Kong Bingxian
It is exposed at below housing, first gear has been arranged concentrically on the left of the walking wheel body；
The driving wheel includes：
Drive sprocket axle, is located on the inside of the housing left side wall, positioned at live axle rear in left-right direction；
Active wheel body, is rotatably set on the drive sprocket axle, and the active wheel body is in right-narrow and left-wide frustum,
The second gear engaged with first gear is arranged concentrically on the right side of the active wheel body；
The transmission drum includes：
Inclined ramp, from the right side before be located to left back direction on the left of housing, on drive sprocket axle rear, the inclined ramp
Rotation slot is formed, the inclined ramp inwall forms the first dop；
One-level screw rod, is slidably plugged in the inclined ramp, and the one-level screw rod side wall is axially arranged with along it to be used to
The rotation inner chamber that left side opening is provided with the first stopper slot of the first dop, the one-level screw rod is installed with, the rotation inner chamber is left
Side is detachably connected restraining position ring block, and rotation inner chamber right-hand member is provided with right opening, and the right opening inwall is provided with the second dop；
One-level nut, is rotatably plugged in the rotation slot, is spirally connected with the one-level screw rod；
Two grades of nuts, including be rotatably located at the nut body of intracavitary in the rotation, be located at the nut vertically
Tapped blind hole on the right side of body, it is located at the torsion plug being plugged on the left of the nut body and rotatably in spacing ring；
Two grades of screw rods, are screwed onto in the tapped blind hole, and two grades of screw rods are open and provided with to be installed with through right
Second stopper slot of the second dop, two grades of screw rod right-hand members are rotatably provided with Live roller；
The pitch of two grades of screw rods is less than the pitch of the one-level screw rod；
The driven pulley includes：
Follower shaft, is located at the housing inner left wall, positioned at the inclined ramp rear；
Driven wheel body, is rotatably set on the follower shaft, and the driven wheel body is in right wide left narrow frustum,
The driven wheel body is connected by Live roller and active wheel body；
Inserted link is stirred, the driven wheel body its right end face is vertically located at；
The device for dotting includes：
Get rotating shaft ready, the housing right side wall is located in left-right direction；
Get cross bar ready, be hinged on it is described get ready in rotating shaft, the cross bar of getting ready is provided with to be installed with along its length
State the slip through hole for stirring inserted link；
Get probe ready, be located at it is described get ready below cross bar not-go-end, it is described get probe lower end ready and be inserted with get pen ready, it is described to beat
Probe is got hole ready described in and got ready.
Further, the torsion plug outer wall is densely covered with anti-skidding salient point.
Beneficial effects of the present invention：
First, a kind of municipal construction road and bridge device for dotting of the present invention, simple to operate, by the device for dotting
The construction part for needing to get ready is placed on, then gently promotes device for dotting that the road wheel is rotated, and passes through driving wheel, biography
Dynamic roller, driven pulley drive the device for dotting action, you can operation is got in realization ready.
2nd, rotating the one-level nut drives the one-level screw rod along the axial stepping of the inclined ramp, drives described pass
Dynamic disk roller adjusts the frequency of the device for dotting along the axial stepping of inclined ramp：
When the Live roller stepping to the right, its move closer to the driving wheel body outer circumference smallest circumference and
The largest circumference of the driven wheel body, the slewing rate of the driven wheel body declines, and the operating frequency of the device for dotting declines,
Show as the point spacing increase that the device for dotting is got ready；
When the Live roller stepping to the left, its move closer to the driving wheel body outer circumference largest circumference and
The smallest circumference of the driven wheel body, the slewing rate of the driven wheel body rises, and the operating frequency of the device for dotting rises,
Show as the point spacing reduction that the device for dotting is got ready.
3rd, rotating two grades of nuts drives two grades of screw rods along the axial stepping of the inclined ramp, drives described pass
Dynamic disk roller adjusts the frequency of the device for dotting along the axial stepping of inclined ramp：
Two grades of screw rods drive step motion of the Live roller along inclined ramp axial direction, add described one
The motion shape journey of level screw rod so that the Live roller reaches the low order end and high order end of the active wheel body, realizes maximum model
The regulation enclosed；
The pitch of two grades of screw rods is less than the pitch of the one-level screw rod so that rotation two grades of nuts one week
The step distance of Live roller is less than the step distance of Live roller when rotating the one-level nut one week, and the device for dotting is beaten
The point spacing regulation of point is sensitiveer.
Brief description of the drawings
The present invention is further described with reference to the accompanying drawings and examples.
Fig. 1 is a kind of sectional view of embodiment of the device for dotting.
Fig. 2 is a kind of sectional view of embodiment of the device for dotting.
Fig. 3 is a kind of sectional view of embodiment of the device for dotting.
Fig. 4 is a kind of sectional view of embodiment of Section A-A in Fig. 1.
Fig. 5 is a kind of sectional view of embodiment of section B-B in Fig. 1.
Fig. 6 is a kind of sectional view of embodiment of the transmission drum.
In figure:
1. housing, 11. fixing bolts, 12. walking holes, 13. get hole ready；
2. road wheel, 21. live axles, 22. walking wheel bodys, 22a. first gears；
3. driving wheel, 31. drive sprocket axles, 32. active wheel bodys, 32a. second gears；
4. transmission drum, 41. inclined ramps, 41a. rotation slots, the dops of 41b. first, 42. one-level screw rods, 42a. first is limited
Position groove, 42b. rotations inner chamber, 42c. spacing rings, the right openings of 42d., the dops of 42e. second, 43. one-level nuts, 44. 2 grades of nuts,
44a. nut bodies, 44b. tapped blind holes, 44c. reverses plug, 45. 2 grades of screw rods, the stopper slots of 45a. second, 45b. live-rollers
Wheel；
5. driven pulley, 51. follower shafts, 52. driven wheel bodys, 53. stir inserted link；
6. device for dotting, 61. get rotating shaft ready, and 62. get cross bar ready, and 62a. slides through hole, and 63. get probe ready.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further detailed explanation.
A kind of municipal construction road and bridge device for dotting, is got ready, institute using a kind of adjustable integral point space type device for dotting
Stating adjustable integral point space type device for dotting includes housing 1, road wheel 2, driving wheel 3, transmission drum 4, driven pulley 5, device for dotting
6；
The housing 1 is hollow rectangle shape, and the right side wall of housing 1 is detachably connected by fixing bolt 11, the shell
The lower surface of body 1 is provided with walking hole 12, and the lower surface of housing 1, which is located to be provided with the right side of walking hole 12, gets hole 13 ready；
The road wheel 2 includes：
Live axle 21, is located on the inside of the right side wall of housing 1 in left-right direction；
Walking wheel body 22, is rotatably set on the live axle 21, and walking wheel body 22 lower end passes through walking
Hole 12 is simultaneously emerging in the lower section of housing 1, and the left side of walking wheel body 22 has been arranged concentrically first gear 22a；
The driving wheel 3 includes：
Drive sprocket axle 31, is located on the inside of the left side wall of housing 1, positioned at the rear of live axle 21 in left-right direction；
Active wheel body 32, is rotatably set on the drive sprocket axle 31, and the active wheel body 32 is in right-narrow and left-wide
Frustum, the right side of active wheel body 32 is arranged concentrically the second gear 32a engaged with first gear 22a；
The transmission drum 4 includes：
Inclined ramp 41, from the right side before be located at the left side of housing 1 to left back direction, positioned at the rear of drive sprocket axle 31, the inclination
Rotation slot 41a is formed on slideway 41, the inwall of inclined ramp 41 forms the first dop 41b；
One-level screw rod 42, is slidably plugged in the inclined ramp 41, and the side wall of one-level screw rod 42 is set along its axial direction
There is the rotation inner chamber that left side opening is provided with the first stopper slot 42a for being installed with the first dop 41b, the one-level screw rod 42
Restraining position ring block 42c is detachably connected on the left of 42b, the rotation inner chamber 42b, the rotation inner chamber 42b right-hand members are provided with right opening
42d, the right opening 42d inwalls are provided with the second dop 42e；
One-level nut 43, is rotatably plugged in the rotation slot 41a, is spirally connected with the one-level screw rod 42；
Two grades of nuts 44, including be rotatably located in the rotation inner chamber 42b nut body 44a, be located at vertically
Tapped blind hole 44b on the right side of the nut body 44a, it is located on the left of the nut body 44a and is rotatably plugged in spacing
Torsion plug 44c in ring 42c；
Two grades of screw rods 45, are screwed onto in the tapped blind hole 44b, and two grades of screw rods 45 are through right opening 42d and set
There is the second stopper slot 45a for being installed with the second dop 42e, two grades of screw rods 45 right-hand member is rotatably provided with Live roller
45b；
The pitch of two grades of screw rods 45 is less than the pitch of the one-level screw rod 42；
The driven pulley 5 includes：
Follower shaft 51, is located at the inner left wall of housing 1, positioned at the rear of inclined ramp 41；
Driven wheel body 52, is rotatably set on the follower shaft 51, and the driven wheel body 52 is in right wide left narrow
Frustum, the driven wheel body 52 is connected by Live roller 45b with active wheel body 32；
Inserted link 53 is stirred, its right end face of driven wheel body 52 is vertically located at；
The device for dotting 6 includes：
Get rotating shaft 61 ready, the right side wall of housing 1 is located in left-right direction；
Get cross bar 62 ready, be hinged on it is described get ready in rotating shaft 61, it is described to get cross bar 62 ready along its length provided with being used to
It is installed with the slip through hole 62a for stirring inserted link 53；
Get probe 63 ready, be located at it is described get ready below the not-go-end of cross bar 62, it is described get 63 lower ends of probe ready and be inserted with get pen ready,
The probe 63 of getting ready is got hole 13 ready and got ready through described.
Further, the torsion plug 44c outer walls are densely covered with anti-skidding salient point.
Specifically used method：
Step 1, road wheel 2 is promoted to walk：
The device for dotting is placed on to the construction part for needing to get ready, the construction for then making walking wheel body 22 be got ready with needs
Location contacts, then cause the walking wheel body 22 is rotated to walk with device for dotting described in hand propelled；
Step 2, transmission drives device for dotting 6 to get ready：
The walking wheel body 22 drives the second gear 32a, active wheel body 32 to rotate by first gear 22a, described
Active wheel body 32 drives driven wheel body 52 by Live roller 45b, stir inserted link 53 rotates；
The inserted link 53 of stirring acts on the slip through hole 62a so that described to get cross bar 62 ready and done around rotating shaft 61 is got ready
Reciprocal swings up and down, described to get that probe 63 is descending to be got hole 13 ready and got ready through described ready；
Step 3, frequency is got in one-level regulation ready：
The one-level nut 43 is rotated, because the first stopper slot 42a of the one-level screw rod 42 is arrested by the first dop 41b
Limit so that the one-level screw rod 42 is in the axial stepping of inclined ramp 41 described in the effect lower edge of one-level nut 43；
The Live roller 45b adjusts the frequency of the device for dotting 6 along the direction stepping of inclined ramp 41：
When the Live roller 45b steppings to the right, it moves closer to the smallest circle of the outer circumference of active wheel body 32
The largest circumference of all and described driven wheel body 52, the slewing rate of the driven wheel body 52 declines, the device for dotting 6 it is dynamic
Working frequency declines, and shows as the point spacing increase that the device for dotting 6 is got ready；
When the Live roller 45b steppings to the left, it moves closer to the greatest circle of the outer circumference of active wheel body 32
The smallest circumference of all and described driven wheel body 52, the slewing rate of the driven wheel body 52 rises, the device for dotting 6 it is dynamic
Working frequency rises, and shows as the point spacing reduction that the device for dotting 6 is got ready；
Step 4, frequency is got in two grades of regulations ready：
Two grades of nuts 44 are driven to rotate by twisting the torsion plug 44c, due to the of two grades of screw rods 45
Two stopper slot 45a are arrested limit by the second dop 42e and can not rotated so that two grades of screw rods 45 are made by two grades of nuts 44
With and threadingly blind hole 44b radial directions stepping, i.e., along the axial stepping of the inclined ramp 41；
The Live roller 45b is adjusted between the point that the device for dotting 6 is got ready along the direction stepping of inclined ramp 41
Away from；
Two grades of screw rods 45 drive step motions of the Live roller 45b along the axial direction of inclined ramp 41, increase
The motion shape journey of the one-level screw rod 42 so that the Live roller 45b reaches the low order end and most of the active wheel body 32
Left end, realizes the regulation of maximum magnitude；
The pitch of two grades of screw rods 45 is less than the pitch of the one-level screw rod 42 so that rotation two grades of nuts
44 1 weeks Live roller 45b step distance is less than the step distance of Live roller 45b when rotating the one-level nut 43 1 weeks,
The point spacing regulation that the device for dotting 6 is got ready is sensitiveer.
Using the above-mentioned desirable embodiment according to the present invention as enlightenment, by above-mentioned description, relevant staff is complete
Various changes and amendments can be carried out without departing from the scope of the technological thought of the present invention' entirely.The technology of this invention
Property scope is not limited to the content on specification, it is necessary to its technical scope is determined according to right.
Claims (2)
1. a kind of municipal construction road and bridge device for dotting, it is characterised in that：Including housing (1), road wheel (2), driving wheel
(3), transmission drum (4), driven pulley (5), device for dotting (6)；
The housing (1) is hollow rectangle shape, and housing (1) right side wall is detachably connected by fixing bolt (11), described
Housing (1) lower surface is provided with walking hole (12), and housing (1) lower surface, which is located to be provided with the right side of walking hole (12), gets hole ready
(13)；
The road wheel (2) includes：
Live axle (21), is located on the inside of the housing (1) right side wall in left-right direction；
Walking wheel body (22), is rotatably set on the live axle (21), and described walking wheel body (22) lower end passes through row
Walk hole (12) and be emerging in below housing (1), first gear (22a) has been arranged concentrically on the left of the walking wheel body (22)；
The driving wheel (3) includes：
Drive sprocket axle (31), is located on the inside of the housing (1) left side wall, positioned at live axle (21) rear in left-right direction；
Active wheel body (32), is rotatably set on the drive sprocket axle (31), and the active wheel body (32) is in right-narrow and left-wide
Frustum, be arranged concentrically the second gear (32a) engaged with first gear (22a) on the right side of the active wheel body (32)；
The transmission drum (4) includes：
Inclined ramp (41), from the right side before be located to left back direction on the left of housing (1), it is described to incline positioned at drive sprocket axle (31) rear
Rotation slot (41a) is formed on inclined ramp (41), inclined ramp (41) inwall forms the first dop (41b)；
One-level screw rod (42), is slidably plugged in the inclined ramp (41), and one-level screw rod (42) the side wall is along its axial direction
Provided with the first stopper slot (42a) to be installed with the first dop (41b), turning provided with left side opening in the one-level screw rod (42)
Restraining position ring block (42c) is detachably connected on the left of dynamic inner chamber (42b), the rotation inner chamber (42b), the rotation inner chamber (42b) is right
End is provided with right opening (42d), and described right opening (42d) inwall is provided with the second dop (42e)；
One-level nut (43), is rotatably plugged in the rotation slot (41a), is spirally connected with the one-level screw rod (42)；
Two grades of nuts (44), including be rotatably located in the rotation inner chamber (42b) nut body (44a), set vertically
Tapped blind hole (44b) on the right side of the nut body (44a), it is located on the left of the nut body (44a) and rotatably inserts
It is located at the torsion plug (44c) in spacing ring (42c)；
Two grades of screw rods (45), are screwed onto in the tapped blind hole (44b), and two grades of screw rods (45) are open (42d) simultaneously through right
And the second stopper slot (45a) to be installed with the second dop (42e) is provided with, two grades of screw rods (45) right-hand member is rotatably provided with
Live roller (45b)；
The pitch of two grades of screw rods (45) is less than the pitch of the one-level screw rod (42)；
The driven pulley (5) includes：
Follower shaft (51), is located at the housing (1) inner left wall, positioned at the inclined ramp (41) rear；
Driven wheel body (52), is rotatably set on the follower shaft (51), and the driven wheel body (52) is in right wide left narrow
Frustum, the driven wheel body (52) passes through Live roller (45b) and active wheel body (32) and is connected；
Inserted link (53) is stirred, driven wheel body (52) its right end face is vertically located at；
The device for dotting (6) includes：
Get rotating shaft (61) ready, the housing (1) right side wall is located in left-right direction；
Get cross bar (62) ready, be hinged on it is described get ready in rotating shaft (61), it is described to get cross bar (62) ready along its length provided with using
To be installed with the slip through hole (62a) for stirring inserted link (53)；
Get probe (63) ready, be located at it is described get ready below cross bar (62) not-go-end, it is described get probe (63) lower end ready and be inserted with get ready
Pen, the probe (63) of getting ready is got hole (13) ready and got ready described in.
2. a kind of municipal construction road and bridge device for dotting according to claim 1, it is characterised in that：Described reverse is inserted
Head (44c) outer wall is densely covered with anti-skidding salient point.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710563449.2A CN107268444B (en) | 2017-07-12 | 2017-07-12 | A kind of municipal construction road and bridge device for dotting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710563449.2A CN107268444B (en) | 2017-07-12 | 2017-07-12 | A kind of municipal construction road and bridge device for dotting |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107268444A true CN107268444A (en) | 2017-10-20 |
| CN107268444B CN107268444B (en) | 2018-05-29 |
Family
ID=60071845
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710563449.2A Active CN107268444B (en) | 2017-07-12 | 2017-07-12 | A kind of municipal construction road and bridge device for dotting |
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| Country | Link |
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| CN (1) | CN107268444B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108130860A (en) * | 2017-12-22 | 2018-06-08 | 温州市创新市政建设工程有限公司 | A kind of municipal construction road and bridge device for dotting |
| CN108294689A (en) * | 2018-02-23 | 2018-07-20 | 于尔多 | Push type double-cavity floor sweeping robot |
| CN108309154A (en) * | 2018-02-23 | 2018-07-24 | 于尔多 | Sweeping method of push type double-cavity sweeping robot |
| CN110700111A (en) * | 2019-10-31 | 2020-01-17 | 河南城建学院 | Bridge floor concrete layer reinforcing bar positioner |
| CN114654442A (en) * | 2022-05-25 | 2022-06-24 | 昆明理工大学 | Line drawing device for tunnel blasting drilling positioning |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107753059B (en) * | 2017-12-01 | 2020-09-22 | 青岛大学附属医院 | Ultrasonic probe handheld bracket for ultrasonic detection |
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| CN108130860A (en) * | 2017-12-22 | 2018-06-08 | 温州市创新市政建设工程有限公司 | A kind of municipal construction road and bridge device for dotting |
| CN108294689A (en) * | 2018-02-23 | 2018-07-20 | 于尔多 | Push type double-cavity floor sweeping robot |
| CN108309154A (en) * | 2018-02-23 | 2018-07-24 | 于尔多 | Sweeping method of push type double-cavity sweeping robot |
| CN110700111A (en) * | 2019-10-31 | 2020-01-17 | 河南城建学院 | Bridge floor concrete layer reinforcing bar positioner |
| CN114654442A (en) * | 2022-05-25 | 2022-06-24 | 昆明理工大学 | Line drawing device for tunnel blasting drilling positioning |
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| CN107268444B (en) | 2018-05-29 |
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