CN106441041A - Perpendicularity detection device - Google Patents
Perpendicularity detection device Download PDFInfo
- Publication number
- CN106441041A CN106441041A CN201610925917.1A CN201610925917A CN106441041A CN 106441041 A CN106441041 A CN 106441041A CN 201610925917 A CN201610925917 A CN 201610925917A CN 106441041 A CN106441041 A CN 106441041A
- Authority
- CN
- China
- Prior art keywords
- guide rail
- slide
- magnet
- front face
- rear surface
- 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.)
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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
- G01B5/24—Measuring arrangements characterised by the use of mechanical techniques for measuring angles or tapers; for testing the alignment of axes
- G01B5/245—Measuring arrangements characterised by the use of mechanical techniques for measuring angles or tapers; for testing the alignment of axes for testing perpendicularity
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/22—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring angles or tapers; for testing the alignment of axes
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Magnetic Bearings And Hydrostatic Bearings (AREA)
Abstract
The invention discloses a perpendicularity detection device. The perpendicularity detection device comprises a base, a sliding base and a balancing mechanism; the base comprises a base part and a guide rail perpendicular to the plane where the bottom wall of the base part is located; the sliding base is arranged on the guide rail and slides along the guide rail which is perpendicular to the plane where the bottom wall of the base part is located, and a detection meter is arranged on the sliding base; the balancing mechanism generates repelling force or attracting force which enables the two opposite faces between the sliding base and the guide rail to repel or attract each other between the two opposite faces, so that all points in the two opposite faces between the sliding base and the guide rail are in a uniform repelling or uniform attracting state. According to the perpendicularity detection device, in the process of detecting the perpendicularity of a workpiece, it is guaranteed that the sliding base does not incline relative to the guide rail, therefore, the cooperation portions of the sliding base and the guide rail keep uniformly repelled or uniformly attracted, and the pressure of the contact portions can be reduced; on one hand, it is guaranteed that the sliding base and the guide rail cannot be sharply worn, and on the other hand, it is guaranteed that the sliding base moves smoothly.
Description
Technical field
The present invention relates to a kind of detection means, particularly a kind of detection means of detection workpiece perpendicularity.
Background technology
Some require higher workpiece, such as Digit Control Machine Tool for surface perpendicularity（CNC）L-type fixture or mould
The workpiece such as core rod, need to detect which by testing apparatus for verticality, and such as testing result shows that its perpendicularity is unsatisfactory for public affairs
Difference is required, then must continue to be processed workpiece, until perpendicularity meets tolerance.
In this regard, China Patent Publication No. discloses a kind of inspection of perpendicularity for the application for a patent for invention of " CN 102243052A "
Device is surveyed, including pedestal, is vertically built in the guide rail of plane on pedestal, the movement for being loaded on guide rail and can sliding up and down along guide rail
Block and the contiguous block of movable block sidepiece is fixed on, dial gauge is then installed on contiguous block.During work, measuring for verticality is filled
Put and workpiece to be detected be placed on work platformses, wherein, the bottom surface of the pedestal of testing apparatus for verticality and work to be detected
The datum plane of part is contacted with workbench, and the measurement bar of mobile foundation to dial gauge thereon is to be measured flat with workpiece to be detected
Face contacts, and then, drives movable block to slide up and down along guide rail, and observes the situation of change of dial gauge indicator, the such as change of indicator
Amplitude represents that the perpendicularity of workpiece meets tolerance in certain limit, that is,；If the amplitude of variation of indicator rises out necessarily
Scope, then it represents that the perpendicularity of workpiece does not meet tolerance.
But above-mentioned testing apparatus for verticality, due to being affected by machining accuracy and assembly precision, the joining of movable block and guide rail
Will necessarily there is tiny gap at conjunction, therefore, under the action of gravity of movable block, contiguous block and dial gauge, will necessarily drive
Make contiguous block trickle inclination forward（I.e. to the trickle inclination of percentage apparent bearing）, after inclination, movable block inclines side by which
Lower corner is area linear with the antetheca of guide rail to offset, local pressure is larger, is on the one hand easily caused the lower corner and offsets with which
There is sharp wear in guide rail front face；On the other hand, movable block movement can be caused to have some setbacks.
Content of the invention
The main object of the present invention is to propose a kind of testing apparatus for verticality, it is intended to reduces and weares and teares and ensure that movement is smooth.
For achieving the above object, the present invention proposes a kind of testing apparatus for verticality, including：
Pedestal, including base portion and the guide rail of the diapire place plane perpendicular to the base portion；
Slide, on the guide rail and along the guide rail perpendicular to the base portion the planar slide of diapire place, the slide
It is provided with detection table；
Balanced controls, the balanced controls are produced to two opposite faces between the slide and guide rail makes two opposite faces repel each other
Or attracting repulsion or absorption affinity, make to repel or uniform in uniform between the slide and two opposite face each points of guide rail
The state of absorption.
Technical solution of the present invention is provided with guide rail and slide can be to two opposite faces between the slide and guide rail
Produce so that two opposite faces is repelled each other or attracting repulsion or absorption affinity balanced controls（For example, can be by gases at high pressure from slide
Rear surface spray to the high pressure air-blowing mechanism of guide rail front face；Or for being embedded at the rear surface of guide rail front face and slide respectively
On the first Magnet and the second Magnet）, make to repel or equal in uniform between the slide and two opposite face each points of guide rail
The state of even absorption.Can be during detection workpiece perpendicularity, it is ensured that inclining does not occur slide in opposite rail, so that slide
Adsorb with holding face homogeneous phase at the cooperation of guide rail or repel each other, it is possible to decrease the pressure of contact position, on the one hand ensure slide and guide rail
It is not in sharp wear；On the other hand, it is ensured that slide movement is smooth.
Preferably, two relative between the slide and guide rail faces are the rear surface of slide and the guide rail respectively
Front face, the balanced controls include the gas passage for being opened in the slide, and the gas passage includes that at least one enters
QI KOU and multiple gas outlets, the gas outlet is uniformly on the slide rear surface relative with the front face of the guide rail；
The air inlet is led to outside gases at high pressure delivery pipe, and gases at high pressure are entered after the gas passage from the air inlet,
The front face of the guide rail is sprayed onto from the gas outlet, makes the rear surface of the slide and the front face homogeneous phase of the guide rail
Scold.
Preferably, two relative between the slide and guide rail faces be the rear surface of the slide respectively with described
The front face of guide rail, the balanced controls include the first Magnet for being embedded at the front face of the guide rail and are embedded at the cunning
Second Magnet of seat rear surface；When first Magnet and second Magnet are oppositely arranged for like pole, described first
Magnet produces repulsion to second Magnet, drives front face of the slide to wall thereafter with the guide rail to repel each other；And work as
When first Magnet is oppositely arranged for opposite pole with second Magnet, first Magnet is produced to second Magnet
Absorption affinity, the rear surface of the slide is adsorbed in the front face of the guide rail.
Preferably, the gas passage includes the horizontal main channel being opened on the slide and a plurality of logical with the master
The vertical subchannel of road connection, the main channel is led to the outside gases at high pressure delivery pipe by the air inlet, position
Then lead to subchannel in the gas outlet of the slide rear surface, gases at high pressure first enter the master from the air inlet and lead to
Road, then branches to a plurality of subchannel from the main channel, is finally sprayed to through the gas outlet by the subchannel described
The front face of guide rail.
Preferably, first Magnet and second Magnet are made up of strong magnet material, and first Magnet is from described
The top of the front face of guide rail extends to bottom.
Preferably, the pedestal is made using marble.
Preferably, the pedestal is triangular in shape, in its two adjacent right-angle sides, has a right-angle side to form the base
Portion, the diapire of the base portion is supported by support platform, and another right-angle side forms the guide rail.
Preferably, the left wall face of the guide rail and right wall open up the left side for being respectively perpendicular to base bottom wall place plane
Guide runner and right guide runner, there are the left plate and right plate for extending back, the left side in the left and right sides of the rear surface of the slide
Side plate and right plate are contacted with the left wall face of guide rail and right wall respectively and rear end is extended to positioned at the left guide runner and institute
The outside of right guide runner is stated, the rear end of the left plate and the right plate is respectively equipped with can stretch into left guide runner and right guide runner
Interior left folding turn of bilge and right folding turn of bilge.
Preferably, between the left folding turn of bilge and the right folding turn of bilge and the left guide runner and the right guide runner being
Gap or interference fits, when the rear surface of the slide is repelled each other with the front face of the guide rail, the left folding turn of bilge and described
The front face of right folding turn of bilge is supported with relative wall's homogeneous phase of the left guide runner and the right guide runner respectively.
Preferably, the left plate of the left folding turn of bilge and the right folding turn of bilge and the slide and the right plate are
It is integrally formed, or is detachably connected by bolt structure.
Description of the drawings
Fig. 1 is the schematic perspective view of testing apparatus for verticality of the present invention；
Fig. 2 is the schematic perspective view of the slide of testing apparatus for verticality of the present invention；
Fig. 3 is the schematic perspective view of another angle of slide of testing apparatus for verticality of the present invention；
Fig. 4 is the side view of the slide of testing apparatus for verticality of the present invention；
Fig. 5 is sectional view of the Fig. 4 along A-A direction.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the present invention, rather than whole embodiments.Base
Embodiment in the present invention, those of ordinary skill in the art obtained under the premise of creative work is not made all its
His embodiment, belongs to the scope of protection of the invention.
If it is to be appreciated that relating to directivity instruction in the embodiment of the present invention（Such as up, down, left, right, before and after ...）,
Then directionality indicates to be only used for explaining in a certain particular pose（As shown in drawings）Under relative position relation between each part,
Motion conditions etc., if the particular pose changes, directionality indicates also correspondingly to change therewith.
The present invention proposes a kind of testing apparatus for verticality.
In embodiments of the present invention, as shown in Figures 1 to 5, the testing apparatus for verticality includes pedestal 1, slide 2 and puts down
Weighing apparatus mechanism 3.
Wherein, pedestal 1 includes the guide rail 12 of base portion and the 11 place plane of diapire perpendicular to base portion, and pedestal 1 is positioned over work
Make on platform and pedestal diapire 11 by work platformses（For example marble work platformses, not shown）Support, guide rail 12 and work
Platform is vertical.
Slide 2 is located at guide rail 12, and can set on slide 2 along guide rail 12 perpendicular to the 11 place planar slide of diapire of base portion
There is detection table（Not shown）, the workpiece to be detected that its probe can tune to and be also positioned on workbench（Not shown）Vertical
Surface to be detected contacts.Detection table can be amesdial or dial gauge etc., as amesdial or dial gauge etc. are existing
Technology, and be well known to those skilled in the art, its concrete structure and operation principle are not repeated here.
Balanced controls 3 are produced to two opposite faces between slide 2 and guide rail 12 makes two opposite faces repel each other or attracting
Repulsion or absorption affinity, make to repel or uniform adsorption in uniform between the slide 2 and two opposite face each points of guide rail 12
State.
By the repulsion or absorption affinity, can be during detection workpiece perpendicularity, it is ensured that not opposite rail 12 of slide 2
Occur inclining, so that holding face homogeneous phase adsorbs or repels each other at slide 2 and the cooperation of guide rail 12, it is possible to decrease the pressure of contact position
By force, on the one hand ensure that slide and guide rail are not in sharp wear；On the other hand, it is ensured that slide movement is smooth.
In a preferred embodiment of the present invention, as shown in Figure 1, Figure 2 and shown in Fig. 5, between the slide 2 and the guide rail 12
Two relative faces are the front face 232 of the rear surface 21 with the guide rail 23 of slide 2 respectively, and balanced controls 3 are high pressure air-blowing
Mechanism, which includes the gas passage for being opened in slide 2, and gas passage includes at least one air inlet 31 and multiple gas outlets
32, air inlet 31 can be located at the lateral wall of slide 2, gas outlet 32 uniformly located at 12 front face 121 of slide 2 and guide rail relative after
On wall 21；Air inlet 31 is by joint 35 and outside gases at high pressure delivery pipe（Not shown）Lead to, gases at high pressure are from air inlet
After mouth 31 enters gas passages, the front face 121 of guide rail 12 is sprayed onto from gas outlet 32, anti-work is produced with the rear surface to slide 2
Firmly, so that the rear surface 21 of slide 2 is uniformly repelled each other with the front face 121 of guide rail 12, so prevent slide 2 because of gravity phase
Guide rail 12 is inclined, it is to avoid slide 2 linear contact lay occurs with guide rail 12, and reduces the pressure between slide 2 and guide rail 12.
Specifically, gas passage is included the horizontal main channel 33 being opened on slide 2 and a plurality of is connected with main channel 33
Vertical subchannel 34, main channel 33 is led to outside gases at high pressure delivery pipe by air inlet 31, positioned at 2 rear surface of slide
21 gas outlet 32 is then led to subchannel 34, and gases at high pressure first enter main channel 33 from air inlet 31, then from main channel 33
A plurality of subchannel 34 is branched to, and the front face 121 of guide rail 12 is finally sprayed to by subchannel 34 through gas outlet 32, slide 2 is produced
Repulsion, so that 2 rear surface 21 of slide is uniformly repelled each other with the front face 121 of guide rail 12.It should be noted that the setting of gas passage
Mode has multiple, no longer illustrates one by one here, and those skilled in the art are understanding the setting illustrated by above-described embodiment
Outside mode, other gas passage set-up modes that mutually can also arrive or the set-up mode for being equal to above-mentioned gas passage all should be limited
System is within protection scope of the present invention.
In addition to the above described embodiments, balanced controls 3 can also adopt other embodiments, and for example, balanced controls 3 include embedding
The first Magnet located at the front face 121 of guide rail 12（Not shown）And it is embedded in the second Magnet of 2 rear surface 21 of slide（Do not scheme
Show）, it is to ensure to produce sufficiently large absorption affinity or repulsion, the first Magnet and the second magnetic between the first Magnet and the second Magnet
The preferred strong magnet material of ferrum is made.First Magnet starts from the top of the front face 121 of guide rail 12, terminates in the front face of guide rail 12
121 bottom, the i.e. top from the front face of guide rail 12 extend to bottom, to ensure slide 2 in the scope which moves, first
Magnet and the second Magnet can all occur magneticaction, when the first Magnet and the second Magnet are oppositely arranged for like pole, according to
Magnet homopolar-repulsion principle, the first Magnet produces repulsion to the second Magnet, so as to drive slide 2 to wall 21 thereafter and guide rail 12
Front face 121 repel each other；And when the first Magnet and the second Magnet are oppositely arranged for opposite pole, then attracting according to Magnet heteropole
Attached principle, the first Magnet can produce absorption affinity to the second Magnet, and the rear surface 21 of slide 2 is adsorbed in the antetheca of guide rail 12
Face 121, so as to prevent slide, because of gravity, opposite rail 12 is inclined, it is to avoid slide 2 linear contact lay occurs with guide rail 12, and then reduces
Pressure between slide 2 and guide rail 12.Alternatively, the first Magnet and the second Magnet all can respectively with guide rail 12 and the phase of slide 2
Answer flush.
In embodiments of the present invention, as shown in Figure 1 and Figure 2, the left wall face of guide rail 12 and right wall are opened up and are respectively perpendicular to base
The left guide runner 122 of the 11 place plane of diapire in portion and right guide runner 123, the left and right sides of the rear surface of slide 2 has prolongs backward
The left plate 22 that stretches and right plate 23, left plate 22 and right plate 23 contact with the left wall face of guide rail 12 and right wall respectively and
Rear end is extended to positioned at left guide runner 122 and the outside of right guide runner 123, and the rear end of left plate 22 and right plate 23 is respectively equipped with
Can stretch into the left folding turn of bilge 4 in left guide runner 122 and right guide runner 123 and right folding turn of bilge 5, left folding turn of bilge 4 and right folding turn of bilge 5 with
Left guide runner 122 and 123 preferred gap of right guide runner or interference fits, when the rear surface 21 of slide 2 and the antetheca of guide rail 12
When face 121 is repelled each other, the front face of left folding turn of bilge 4 and right folding turn of bilge 5 is relative with left guide runner 122 and right guide runner 123 respectively
Wall homogeneous phase is supported.When slide 2 is moved, left folding turn of bilge 4 and right folding turn of bilge 5 are along left guide runner 122 and the vertical cunning of right guide runner 123
Dynamic, form the guiding slided by slide 2.It should be noted that by slide 2 slidably located at guide rail 12 embodiment have multiple,
As space is limited, here just differs an illustration.Those skilled in the art are gone back outside the structure for understanding illustrated by above-described embodiment
It is contemplated that other be slidably mounted structure or be equal to the above-mentioned structure being slidably mounted and all should be limited in the present invention's
Within protection domain.
Specifically, the left plate 22 of left folding turn of bilge 4 and right folding turn of bilge 5 and slide 2 and right plate 23 are formed in one, integrally
The structure of molding not only ensure that the structural stability of slide 2, and convenient formation, with low cost.It should be noted that left folding
The left plate 22 and right plate 23 of turn of bilge 4 and right folding turn of bilge 5 and slide can also be independent individual, and left folding turn of bilge 4 and right folding are curved
Portion 5 is detachably connected with left plate 22 and right plate 23 by bolt structure 6 respectively, to facilitate dismounting slide 2 on guide rail 12.
Pedestal 1 can be made using the metal such as rustless steel, copper, aluminium alloy, to ensure the structural strength of pedestal 1, and considered
Cost and the convenience of processing, pedestal 1 may also be employed marble and make.The shape of pedestal 1 and it is configured with multiple embodiment party
Formula, for example, square, triangle or T-shaped etc..
In one embodiment, as shown in figure 1, pedestal 1 is triangular in shape, in its two adjacent right-angle sides, there is a right angle
While forming the base portion, the diapire 11 of base portion is contacted with work platformses, and is supported by support platform, and another right-angle side is formed leads
Rail 12.Further, as shown in figure 1, the middle part hollow out of pedestal 1, on the one hand can reduce weight material-saving, on the other hand,
It is easy to handling pedestal 1.
The preferred embodiments of the present invention are these are only, the scope of the claims of the present invention is not thereby limited, every in the present invention
Inventive concept under, the equivalent structure transformation made using description of the invention and accompanying drawing content, or directly/be used in indirectly which
He is included in the scope of patent protection of the present invention technical field of correlation.
Claims (10)
1. testing apparatus for verticality, it is characterised in that include：
Pedestal, including base portion and the guide rail of the diapire place plane perpendicular to the base portion；
Slide, on the guide rail and along the guide rail perpendicular to the base portion the planar slide of diapire place, the slide
It is provided with detection table；
Balanced controls, the balanced controls are produced to two opposite faces between the slide and guide rail makes two opposite faces repel each other
Or attracting repulsion or absorption affinity, make to repel or uniform in uniform between the slide and two opposite face each points of guide rail
The state of absorption.
2. testing apparatus for verticality as claimed in claim 1, it is characterised in that：Relative between the slide and the guide rail
Two faces are the front face of the rear surface with the guide rail of slide respectively, and the balanced controls include the gas for being opened in the slide
Body passage, the gas passage includes at least one air inlet and multiple gas outlets, and the gas outlet is uniformly located at the slide
On the rear surface relative with the front face of the guide rail；The air inlet is led to outside gases at high pressure delivery pipe, high pressure gas
Body is entered after the gas passage from the air inlet, is sprayed onto the front face of the guide rail from the gas outlet, is made the slide
Rear surface uniformly repel each other with the front face of the guide rail.
3. testing apparatus for verticality as claimed in claim 1, it is characterised in that：Relative between the slide and the guide rail
Two faces are the front face of the rear surface with the guide rail of the slide respectively, and the balanced controls include to be embedded at the guide rail
The first Magnet of front face and be embedded at the second Magnet of the slide rear surface；When first Magnet and described second
When Magnet is oppositely arranged for like pole, first Magnet produces repulsion to second Magnet, drives the slide to which
Rear surface is repelled each other with the front face of the guide rail；And work as first Magnet and be oppositely arranged for opposite pole with second Magnet
When, first Magnet produces absorption affinity to second Magnet, and the rear surface of the slide is adsorbed in the guide rail
Front face.
4. testing apparatus for verticality as claimed in claim 2, it is characterised in that：The gas passage includes to be opened in the cunning
Horizontal main channel and a plurality of vertical subchannel for connecting with the main channel on seat, the main channel passes through the air inlet
Lead to the outside gases at high pressure delivery pipe, the gas outlet positioned at the slide rear surface is then led to subchannel,
Gases at high pressure first enter the main channel from the air inlet, then branch to a plurality of subchannel from the main channel, most
The front face of the guide rail is sprayed to through the gas outlet by the subchannel afterwards.
5. testing apparatus for verticality as claimed in claim 3, it is characterised in that：First Magnet and second Magnet by
Strong magnet material is made, and first Magnet extends to bottom from the top of the front face of the guide rail.
6. testing apparatus for verticality as claimed in claim 1, it is characterised in that：The pedestal is made using marble.
7. testing apparatus for verticality as claimed in claim 1, it is characterised in that：The pedestal is triangular in shape, and its two adjacent
Right-angle side in, have a right-angle side to form the base portion, the diapire of the base portion is supported by support platform, another right-angle side
Form the guide rail.
8. testing apparatus for verticality as claimed in any of claims 1 to 7 in one of claims, it is characterised in that：The left wall of the guide rail
Face and right wall open up the left guide runner of the diapire place plane for being respectively perpendicular to the base portion and right guide runner, the slide
There are the left plate and right plate for extending back, the left plate and right plate left wall respectively with guide rail in the left and right sides of rear surface
Face and right wall contact and rear end is extended to positioned at the left guide runner and the outside of the right guide runner, the left plate and
The rear end of the right plate is respectively equipped with the left folding turn of bilge and right folding turn of bilge that can stretch in left guide runner and right guide runner.
9. testing apparatus for verticality as claimed in claim 8, it is characterised in that：The left folding turn of bilge and the right folding turn of bilge with
It is gap or interference fits between the left guide runner and the right guide runner, when rear surface and the guide rail of the slide
Front face when repelling each other, the front face of the left folding turn of bilge and the right folding turn of bilge is led with the left guide runner and the right side respectively
Relative wall's homogeneous phase of chute is supported.
10. testing apparatus for verticality as claimed in claim 9, it is characterised in that：The left folding turn of bilge and the right folding turn of bilge
It is formed in one with the left plate of the slide and the right plate, or is detachably connected by bolt structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610925917.1A CN106441041A (en) | 2016-10-24 | 2016-10-24 | Perpendicularity detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610925917.1A CN106441041A (en) | 2016-10-24 | 2016-10-24 | Perpendicularity detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106441041A true CN106441041A (en) | 2017-02-22 |
Family
ID=58176341
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610925917.1A Pending CN106441041A (en) | 2016-10-24 | 2016-10-24 | Perpendicularity detection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106441041A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4680869A (en) * | 1985-05-13 | 1987-07-21 | David Murkens | Cylindrical square |
| CN201497477U (en) * | 2009-09-02 | 2010-06-02 | 青岛前哨精密仪器有限公司 | High-precision perpendicularity checking instrument |
| CN104833295A (en) * | 2015-04-29 | 2015-08-12 | 东莞市鼎先激光科技股份有限公司 | Vertical parallelometer |
| CN204980874U (en) * | 2015-09-14 | 2016-01-20 | 河南省发达起重机有限公司 | Hoist bottom running gear |
-
2016
- 2016-10-24 CN CN201610925917.1A patent/CN106441041A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4680869A (en) * | 1985-05-13 | 1987-07-21 | David Murkens | Cylindrical square |
| CN201497477U (en) * | 2009-09-02 | 2010-06-02 | 青岛前哨精密仪器有限公司 | High-precision perpendicularity checking instrument |
| CN104833295A (en) * | 2015-04-29 | 2015-08-12 | 东莞市鼎先激光科技股份有限公司 | Vertical parallelometer |
| CN204980874U (en) * | 2015-09-14 | 2016-01-20 | 河南省发达起重机有限公司 | Hoist bottom running gear |
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| PB01 | Publication | ||
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Application publication date: 20170222 |