CN211036648U - Hand-held well lid milling machine - Google Patents
Hand-held well lid milling machine Download PDFInfo
- Publication number
- CN211036648U CN211036648U CN201921178059.4U CN201921178059U CN211036648U CN 211036648 U CN211036648 U CN 211036648U CN 201921178059 U CN201921178059 U CN 201921178059U CN 211036648 U CN211036648 U CN 211036648U
- Authority
- CN
- China
- Prior art keywords
- hand
- milling
- well lid
- held
- 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.)
- Expired - Fee Related
Links
- 238000003801 milling Methods 0.000 title claims abstract description 145
- 238000009826 distribution Methods 0.000 claims abstract description 3
- 230000003014 reinforcing effect Effects 0.000 claims description 8
- 238000007689 inspection Methods 0.000 description 15
- 238000005520 cutting process Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 230000014509 gene expression Effects 0.000 description 2
- 238000000227 grinding Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Landscapes
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
Abstract
The utility model discloses a hand-held well lid milling machine, including hand frame, positioning mechanism and mill the plane mechanism, positioning mechanism is including the lifting screw who locates hand frame, and the locating support and be used for pushing up the tensioning subassembly of the tight wall of a well, lifting screw and locating support screw-thread fit and coaxial, and the tensioning subassembly is along at least three groups of equidistant distribution of locating support circumference, mills plane mechanism including locating hand frame mill plane rim plate and drive mill plane rim plate pivoted motor. The utility model discloses have locate function, simple structure, it is small, light in weight, the well lid that can be competent in narrow space mills plane work.
Description
Technical Field
The utility model relates to a mill the plane device, especially a hand-held type well lid milling machine.
Background
In cities, a plurality of inspection wells are arranged due to the requirements of water supply, electric power, telecommunication, gas pipelines and the like, and the weakest and most easily damaged inspection wells are inspection well cover seats and edge road surfaces. The technical scheme for repairing the inspection well cover seat and the edge is that the inspection well cover seat is separated from the peripheral cement road surface, and then the inspection well cover seat is taken out by using a clamp.
At present, a skid steer loader is mainly adopted to drive a well lid milling accessory for separating a well lid seat from a peripheral cement pavement, for example, a milling device of a well lid milling machine in a patent has the main defects that: 1) and limitation of applicable occasions: the skid steer loader is large in size, cannot be used for milling and planing well covers in narrow spaces, and needs to be matched with a special hoisting fixture, the fixture is firstly adopted for positioning, and then a positioning shaft of the milling and planing machine is aligned to a positioning hole of the fixture for milling and planing; 2) the noise is big: the noise of the skid steer loader and the noise of the milling and planing road surface of the well lid milling tool are reduced; 3) the cost is high: skid steer loaders and accessories are expensive to manufacture.
Disclosure of Invention
An object of the utility model is to provide a hand-held well lid milling machine with locate function, simple structure, it is small, light in weight, the well lid that can be competent in narrow space mills plane work.
The utility model provides a technical scheme that its technical problem adopted is: the utility model provides a hand-held well lid milling machine, includes hand frame, positioning mechanism and mills plane mechanism, and positioning mechanism is including the lifting screw who locates hand frame, and the tensioning subassembly of locating support and being used for the tight wall of a well in top, and lifting screw and positioning support screw-thread fit and coaxial, tensioning subassembly are along at least three groups of equidistant distribution in positioning support circumference, mill plane mechanism including locating hand frame mill plane rim plate and drive mill plane rim plate pivoted motor.
Lifting screw and locating support screw-thread fit realize raising and lowering functions, not only can adjust before milling and mill the distance of milling wheel dish and ground, guarantee to mill the wheel dish and have certain safe distance with ground, do the preparation for milling the start of wheel dish, can also satisfy and mill the requirement of milling ring and ring depth of cut. When the ground is milled, the milling depth is determined according to the lifting height of the lifting screw, so that the matching length of the lifting screw and the positioning support needs to meet a certain milling depth. At least three groups of tensioning assemblies which are uniformly distributed can realize that the positioning support is positioned at the center of the inspection well, certainly, the positioning support is not limited to three groups, and can be four groups, five groups and the like which are uniformly distributed, and the positioning support only needs to be positioned at the center of the inspection well to meet the positioning requirement.
When the milling wheel disc is used, the positioning support is coincided with the center of a well mouth through the positioning mechanism, the tensioning assembly is tightly propped against a well wall, the motor is started, the walking frame is manually controlled to rotate, and the milling wheel disc is used for milling and planing the ground until milling and planing are completed.
Preferably, the milling wheel discs are provided with even groups, each group of milling wheel discs is provided with a group of motors, and the even groups of milling wheel discs are arranged at equal intervals along the circumferential direction of the positioning support. It should be noted that the number of milling wheel discs needs to be even, i.e. 2, 4 · 2n, where n is 1, 2, 3 · · and are arranged at equal intervals, so that the stability is high and the control is convenient, and it is necessary to ensure that the milling wheel discs are on the same circumference to avoid the milling stagger. Preferably, the milling mechanism is provided with two sets of milling wheel discs, each set of milling wheel disc is provided with a set of motor, and the two sets of motors have opposite rotating directions.
Preferably, the direction of rotation of the motor is the same on the milling ring. The milling ring refers to the annular milling direction formed when the even number of groups of milling wheel discs run, the motor rotates along the same direction of the milling ring, the same milling force direction is guaranteed, and the torque caused by cutting is reduced to the maximum extent.
Preferably, the milling wheel disc adopts a grinding wheel.
Preferably, the positioning bracket is provided with an inner hole in threaded fit with the lifting screw.
Preferably, the tensioning assembly comprises a sleeve, a stud and a tensioning nut, the positioning support is fixed with the sleeve, the sleeve is sleeved outside the stud, the sleeve is in clearance fit with the stud, the tensioning nut is screwed on the stud, and the outer diameter of the tensioning nut is larger than the inner diameter of the sleeve. When the milling machine is used, the stud is moved until the end part of the stud props against the well wall, and then the end part of the stud props against the well wall by screwing the tension nut, so that the milling machine is prevented from slipping. The sleeve and the stud are both of a certain length, and the stud can stretch along the sleeve, so that the positioning requirements of inspection well cover bases of different sizes and specifications are met.
Preferably, the end of the stud is provided with a positioning head, the positioning head comprises a butting part and a vertical part, the butting part is a wedge-shaped block, and the vertical part is a square block perpendicular to the wedge-shaped block. After the well wall is tightly jacked, the part of the abutting part can be embedded into the inner side of the well wall, so that the friction force is increased, and the positioning head is prevented from slipping and rotating. The fixing manner of the positioning head and the stud is not limited, and welding or bolt connection can be adopted.
Preferably, the milling wheel disc is movable along the hand-held machine frame. So set up, satisfy the inspection shaft lid seat of different sizes, specification and mill the needs of milling. Preferably, a plurality of mounting holes are axially formed in the two sides of the hand-held rack, the mounting holes are axially symmetrical along the positioning support, and the milling wheel disc is connected with the hand-held rack through bolts. Preferably, the mounting holes are equally spaced. Specifically, mill and dig the mechanism and include connecting plate and keysets, it is fixed with the keysets that the hand frame passes through the bolt, and the keysets is fixed with the connecting plate, and the connecting plate is fixed with the motor, and the motor output shaft is fixed with milling the wheel dish.
Preferably, a reinforcing rib is arranged between the positioning bracket and the sleeve. So as to improve the connecting strength and rigidity between the positioning bracket and the sleeve and prevent the positioning bracket from deforming. Preferably, a reinforcing plate is arranged between the hand-held machine frame and the connecting plate. The connecting strength and rigidity between the hand rack and the milling mechanism are improved, and the deformation of the hand rack is prevented.
Preferably, handles are arranged at two ends of the hand rack, the handles are cylindrical, and the hand rack is perpendicular to the handles. When milling, the handle is manually controlled to rotate and mill.
The utility model discloses a working procedure:
step 2, adjusting the distance between the milling wheel disc and the milling ground through the lifting screw and the positioning support, ensuring that the milling wheel disc has a safe distance with the milling ground, and preparing for starting the milling wheel disc;
step 3, starting the symmetrical motors, and starting milling of the milling wheel disc;
and 4, manually controlling the handle to rotate, determining the milling depth of the milling wheel disc and the ground according to the matching length of the lifting screw and the positioning support, and finishing milling work.
The utility model has the advantages that:
1. adopt positioning mechanism to well head center location, the wall of a well is tightly pushed up to the locating head, guarantees hand-held milling machine center and well head center coincidence, need not to cooperate with special stone tongs, simple structure, light in weight, small is fit for manual operation, is applicable to the well lid of some narrow spaces and mills plane work.
2. Lifting screw and locating support screw-thread fit realize raising and lowering functions, not only can adjust before milling and mill the distance of milling wheel dish and ground, guarantee to mill the wheel dish and have certain safe distance with ground, do the preparation for milling the start of wheel dish, can also realize milling and milling the ring and cut and the ring depth requirement.
3. The milling wheel discs are symmetrically arranged, the rotating directions of the motors are opposite, the same milling force direction is ensured, and the torque caused by cutting is reduced to the maximum extent.
4. The milling wheel disc can move along the hand-held machine frame, the milling radius of the milling wheel disc is adjustable, and the milling wheel disc is suitable for inspection wells with different sizes and specifications.
5. The skid loader is not needed, the noise of the milling and planing road surface of the well lid milling tool and the well lid milling tool is reduced, and the cost is reduced.
Drawings
Fig. 1 is a perspective view of a milling machine.
Fig. 2 is a front view of the milling machine.
Fig. 3 is a top view of the milling machine.
The labels in the figure are: the milling machine comprises a hand rack 1, a mounting hole 11, a handle 12, a positioning mechanism 2, a lifting screw 21, a positioning support 22, a tensioning assembly 23, a sleeve 231, a stud 232, a tensioning nut 233, a positioning head 234, a abutting portion 2341, a vertical portion 2342, a reinforcing rib 24, a milling mechanism 3, a milling wheel disc 31, a motor 32, a connecting plate 33, an adapter plate 34 and a reinforcing plate 4.
Detailed Description
The structures referred to in the present invention or these terms of art used are further described below. These illustrations are merely exemplary of how the present invention may be implemented and are not intended to limit the present invention in any way.
The present invention will be further described with reference to the accompanying drawings and the following detailed description. In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left" and "right" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the indicated position or element must have a specific orientation, be constituted in a specific orientation, and be operated, and thus, are not to be construed as limitations of the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
As shown in fig. 1-3, a hand-held well lid milling machine includes a hand-held machine frame 1, a positioning mechanism 2 and a milling mechanism 3, where the positioning mechanism 1 includes a lifting screw 21 disposed on the hand-held machine frame 1, a positioning bracket 22 and a tensioning assembly 23 for pushing against a well wall, the positioning bracket 22 is provided with an inner hole in threaded fit with the lifting screw 21, the lifting screw 21 is in threaded fit and coaxial with the positioning bracket 22, the tensioning assembly 23 is distributed at least three groups at equal intervals along the circumferential direction of the positioning bracket 22, the milling mechanism 3 includes a milling wheel 31 disposed on the hand-held machine frame 1 and a motor 32 for driving the milling wheel 31 to rotate, and the milling mechanism 3 is provided with the milling wheel 31.
Lifting screw 21 and locating support 22 screw-thread fit realize the lift function, not only can adjust the distance of milling wheel dish 31 and ground before milling, guarantee that milling wheel dish 31 has certain safe distance with ground, prepare for milling wheel dish 31 starts, can also realize milling the ring-cut and the ring-cut degree of depth requirement. When the ground is milled, the milling depth is determined according to the lifting height of the lifting screw, so that the matching length of the lifting screw 21 and the positioning bracket 22 needs to meet a certain milling depth. At least three groups of tensioning assemblies 23 are uniformly distributed, so that the positioning support 22 can be positioned at the center of the inspection well, of course, the positioning support is not limited to three groups, and can be four groups or five groups which are uniformly distributed, and the positioning support 22 only needs to be positioned at the center of the inspection well, so that the positioning requirement is met.
When the manual milling machine is used, the positioning support 22 is coincided with the center of a well mouth through the positioning mechanism 2, the tensioning assembly 23 props against the well wall, the motor 32 is started, the hand rack 1 is controlled to rotate manually, and the milling wheel disc 31 mills the ground until milling work is completed.
As a specific embodiment, as shown in fig. 1, milling wheel discs 31 have an even number of groups, each milling wheel disc 31 of a group being assigned a respective electric motor 32, and the even number of groups of milling wheel discs 31 being arranged at equal intervals in the circumferential direction of positioning carrier 22. It should be noted that the number of milling wheel discs 31 needs to be even, i.e. 2, 4 · 2n, where n is 1, 2, 3 · · and are arranged at equal intervals, so that the stability is high and the control is convenient, and it is necessary to ensure that the milling wheel discs 31 are on the same circumference to avoid milling stagger. In this embodiment, two sets of milling wheel discs 31 and two sets of motors 32 are selected, and at this time, the two sets of motors 32 rotate in opposite directions, one is counterclockwise, and the other is clockwise, so that milling work can be completed. Milling wheel 31 employs a grinding wheel.
The direction of rotation of the motor 32 is the same on the milling ring. The milling ring is the annular milling direction formed when the even number of milling wheel disc groups operate, the motor 32 rotates along the same direction of the milling ring, the same milling force direction is ensured, and the torque caused by cutting is reduced to the maximum extent.
As a specific embodiment, as shown in fig. 1, the tensioning assembly 23 includes a sleeve 231, a stud 232, and a tensioning nut 233, the positioning bracket 22 is fixed to the sleeve 231, the sleeve 231 is sleeved outside the stud 232, the sleeve 231 is in clearance fit with the stud 232, the tensioning nut 233 is screwed on the stud 232, and the outer diameter of the tensioning nut 233 is greater than the inner diameter of the sleeve 231. When the milling machine is used, the stud 232 is moved until the end part of the stud 232 props against the well wall, and then the end part of the stud 232 props against the well wall by screwing the tension nut 233, so that the milling machine is prevented from slipping. The sleeve 231 and the stud 232 have certain lengths, and the stud 232 can stretch along the sleeve 231, so that the positioning requirements of inspection well cover bases of different sizes and specifications are met.
As a specific embodiment, as shown in fig. 2, the end of the stud 232 is provided with a positioning head 234, the positioning head 234 includes a fastening portion 2341 and a vertical portion 2342, the fastening portion 2341 is a wedge-shaped block, and the vertical portion 2342 is a square block perpendicular to the wedge-shaped block. After the well wall is tightly jacked, the part 2341 of the tightly supporting part can be embedded into the inner side of the well wall, so that friction is increased, and the positioning head 234 is prevented from slipping and rotating. The fixing manner of the positioning head 234 and the stud 232 is not limited, and may be welding or bolting.
As a specific embodiment, as shown in fig. 1-3, the milling wheel disc 31 is movable along the hand frame 1. So set up, mill plane wheel disc 31 mill plane the radius adjustable, satisfy the inspection shaft lid seat of different sizes, specification and mill the plane needs. A plurality of mounting holes 11 are axially formed in two sides of the hand rack 1, the mounting holes 11 are axially symmetrical along the positioning support 22, and the mounting holes 11 are distributed at equal intervals. The milling wheel disc 31 is connected with the hand rack 1 through bolts, specifically, the milling mechanism 3 comprises a connecting plate 33 and an adapter plate 34, the hand rack 1 is fixed with the adapter plate 34 through bolts, the adapter plate 34 is fixed with the connecting plate 33, the connecting plate 34 is fixed with the motor 32, and an output shaft of the motor is fixed with the milling wheel disc 31.
As shown in fig. 1, a reinforcing rib 24 is provided between the positioning bracket 22 and the sleeve 231. To improve the strength and rigidity of the connection between the positioning bracket 22 and the sleeve 231, preventing deformation thereof. A reinforcing plate 4 is arranged between the hand-held machine frame 1 and the connecting plate 33. So as to improve the strength and rigidity of the connection between the hand frame 1 and the milling mechanism 3 and prevent the hand frame from deforming.
As shown in FIG. 1, handles 12 are arranged at two ends of the handrail frame 1, the handles 12 are cylindrical, the handrail frame 1 is perpendicular to the handles 12, and the handles 12 are arranged axially symmetrically along a positioning support 22. During milling, the handle 12 is manually controlled to rotate for milling.
The utility model discloses a working procedure:
step 2, adjusting the distance between the milling wheel disc 31 and the milled ground through the lifting screw 21 and the positioning support 22, ensuring that the milling wheel disc 31 has a safe distance with the milled ground, and preparing for starting the milling wheel disc 31;
step 3, starting the symmetrical motor 32, and starting milling of the milling wheel disc 31;
and 4, manually controlling the handle 12 to rotate, and determining the milling depth of the milling wheel disc 31 and the ground according to the matching length of the lifting screw 21 and the positioning support 22 to finish milling work.
The utility model shown and described herein may be implemented in the absence of any element, limitation, or limitations specifically disclosed herein. The terms and expressions which have been employed are used as terms of description and not of limitation, and there is no intention in the use of such terms and expressions of excluding any equivalents of the features shown and described or portions thereof, and it is recognized that various modifications are possible within the scope of the invention. It should therefore be understood that although the present invention has been specifically disclosed by various embodiments and optional features, modification and variation of the concepts herein described may be resorted to by those skilled in the art, and that such modifications and variations are considered to be within the scope of this invention as defined by the appended claims.
The contents of the articles, patents, patent applications, and all other documents and electronically available information described or cited herein are hereby incorporated by reference in their entirety to the same extent as if each individual publication was specifically and individually indicated to be incorporated by reference. Applicants reserve the right to incorporate into this application any and all materials and information from any such articles, patents, patent applications, or other documents.
Claims (10)
1. The utility model provides a hand-held well lid milling machine, its characterized in that, includes hand frame, positioning mechanism and mills plane mechanism, and positioning mechanism is including the lifting screw who locates hand frame, locating support and the tensioning subassembly that is used for pushing up the wall of a well tightly, and lifting screw and locating support screw-thread fit and coaxial, tensioning subassembly along locating support circumference equidistant at least three groups of distribution, mill plane mechanism including locating hand frame mill plane rim plate and drive mill plane rim plate pivoted motor.
2. A hand-held well lid milling machine according to claim 1, wherein there are even number of sets of milling wheel discs, each set of milling wheel discs being provided with a set of motors, the even number of sets of milling wheel discs being arranged at equal intervals circumferentially along the positioning support.
3. A hand-held well lid milling machine according to claim 2, wherein the direction of rotation of the motor is the same on the milling ring.
4. The hand-held well lid milling machine according to claim 1, wherein the tensioning assembly comprises a sleeve, a stud and a tensioning nut, the positioning bracket is fixed with the sleeve, the sleeve is sleeved outside the stud, the sleeve is in clearance fit with the stud, the tensioning nut is screwed on the stud, and the outer diameter of the tensioning nut is larger than the inner diameter of the sleeve.
5. The hand-held well lid milling machine according to claim 4, wherein the stud end sets a positioning head, the positioning head comprises a butting portion and a vertical portion, the butting portion is a wedge-shaped block, and the vertical portion is a square block perpendicular to the wedge-shaped block.
6. A hand-held well lid milling machine according to claim 1, wherein the milling wheel disc is movable along the hand-held machine frame.
7. The hand-held well lid milling machine according to claim 6, wherein a plurality of mounting holes are axially formed in both sides of the hand-held machine frame, the mounting holes are axially symmetrical along the positioning support, the milling mechanism comprises a connecting plate and an adapter plate, the hand-held machine frame is fixed to the adapter plate through bolts, the adapter plate is fixed to the connecting plate, the connecting plate is fixed to the motor, and an output shaft of the motor is fixed to the milling wheel disc.
8. A hand-held well lid milling machine according to claim 1, wherein reinforcing ribs are provided between the locating bracket and the spigot.
9. A hand-held well lid milling machine according to claim 7, wherein a reinforcing plate is provided between the hand-held machine frame and the connecting plate.
10. A hand-held well lid milling machine according to claim 1, wherein the hand-held machine frame is provided with handles at both ends, the handles are cylindrical, the hand-held machine frame is perpendicular to the handles, and the handles are symmetrical along the positioning support shaft.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201921178059.4U CN211036648U (en) | 2019-07-24 | 2019-07-24 | Hand-held well lid milling machine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201921178059.4U CN211036648U (en) | 2019-07-24 | 2019-07-24 | Hand-held well lid milling machine |
Publications (1)
Publication Number | Publication Date |
---|---|
CN211036648U true CN211036648U (en) | 2020-07-17 |
Family
ID=71568667
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN201921178059.4U Expired - Fee Related CN211036648U (en) | 2019-07-24 | 2019-07-24 | Hand-held well lid milling machine |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN211036648U (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110468672A (en) * | 2019-07-24 | 2019-11-19 | 浙江大学山东工业技术研究院 | A kind of hand-held well lid milling machine |
-
2019
- 2019-07-24 CN CN201921178059.4U patent/CN211036648U/en not_active Expired - Fee Related
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110468672A (en) * | 2019-07-24 | 2019-11-19 | 浙江大学山东工业技术研究院 | A kind of hand-held well lid milling machine |
CN110468672B (en) * | 2019-07-24 | 2024-05-31 | 浙江大学山东工业技术研究院 | Hand-held well lid milling machine |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
AU2011100280A4 (en) | Adapter For Multifunctional Tool | |
CN207289812U (en) | Twin grinding disk, adapter and grinder with fast replacement system | |
EP1715735B1 (en) | Tree stump grinder | |
CN211036648U (en) | Hand-held well lid milling machine | |
JP2007521146A5 (en) | ||
US11866948B2 (en) | Offset mounting adapter for concrete surface processing tool | |
KR20050024333A (en) | Self-Propelled Road Milling Machine | |
US20230080219A1 (en) | Mounting Adapter for Concrete Surface Processing Tools | |
CN211728276U (en) | A steel pipe cutting chamfer all-in-one for vehicle chassis structure | |
CN115533657A (en) | Assembled building steel construction is with equipment of polishing | |
CN110468672B (en) | Hand-held well lid milling machine | |
CN219336727U (en) | Quick wrench for railway maintenance | |
SE2050011A1 (en) | Nut driver device and a method of tightening nuts | |
CN214517997U (en) | A fixture for addendum face is polished | |
US20140216820A1 (en) | Drilling table | |
CN214418698U (en) | Tool for disassembling bearing seat capable of preventing damage | |
US7189152B1 (en) | Height adjustment system for rotating tools | |
KR101553991B1 (en) | Wheel structure for grinding apparatus | |
KR20140100023A (en) | rotation welding apparatus for circumference of pipe | |
US4209910A (en) | Auxiliary device for vertical turning and boring machine tools | |
CN220451389U (en) | Positioning device for building construction | |
KR102532662B1 (en) | Hand grinder abrasive disc replacement system | |
CN218193642U (en) | Digital hydraulic tightening machine | |
CN210414733U (en) | Clamping device is used in processing of PE pipe | |
CN220446416U (en) | Valve assembling platform |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
GR01 | Patent grant | ||
GR01 | Patent grant | ||
CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200717 |