CN111678395A - Hole site measuring device - Google Patents
Hole site measuring device Download PDFInfo
- Publication number
- CN111678395A CN111678395A CN202010459335.5A CN202010459335A CN111678395A CN 111678395 A CN111678395 A CN 111678395A CN 202010459335 A CN202010459335 A CN 202010459335A CN 111678395 A CN111678395 A CN 111678395A
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- fixing ring
- measuring
- sleeve
- rear end
- guide
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- 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
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- 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
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- General Physics & Mathematics (AREA)
- A Measuring Device Byusing Mechanical Method (AREA)
Abstract
The invention discloses a hole position measuring device, which comprises a guide post, a measuring head, a zero alignment ring, a front end fixing ring, a middle fixing ring and a rear end fixing ring, wherein the measuring head is installed at the lower end of the guide post, the upper end surface of the measuring head is contacted with the lower end surface of the front end fixing ring, the middle fixing ring is installed on the front end fixing ring, a disc in the middle of the guide post is positioned in the middle fixing ring, the rear end fixing ring is installed on the middle fixing ring, a measuring component is arranged on the side surface surrounding the rear end fixing ring, a measuring rod of the measuring component is contacted with the top of the guide post, the zero alignment ring is sleeved on the front end fixing ring and the measuring head, and the measuring component can be in an external percentage mode or a built-in sensor mode.
Description
Technical Field
The invention belongs to the technical field of hole site measurement, and particularly relates to a hole site measuring device.
Background
The detection of the holes is very common detection data in the industrial production process, and the existing detection methods mainly comprise three types:
the caliper detection mode comprises the following steps: the hole position is measured by a caliper by a detector, and the detection method has the disadvantages of high labor intensity and low detection efficiency.
The detection mode of the height gauge is as follows: the hole site is measured by the detector with the height gauge, and the detection method has the disadvantages of high labor intensity and low detection efficiency.
Three-coordinate detection mode: the hole positions are measured by the detection personnel through three coordinates, the investment cost of three-coordinate equipment is high, and the detection method occupies a long three-coordinate time and can cause the phenomenon of other products to be detected.
With the development of technology, various dedicated control detection tools have also appeared.
The inventor finds that the prior arts have at least the following technical problems in the practical use process:
1. the existing mainstream detection is still a vernier caliper, positioning is carried out manually, data reading is carried out manually, human influence factors are large, positioning is difficult, and certain errors exist.
2. The existing detection tool is difficult to accurately and systematically measure the specific data of the deviation of the hole site, basically only can be used for judging whether the hole site has the deviation, the deviation direction and the like, and the digital accurate recording of the hole site cannot be realized.
Disclosure of Invention
In order to overcome the above-mentioned disadvantages, the inventor of the present invention has continuously improved and innovated through long-term research and trial and many experiments and efforts, and has proposed a hole position measuring device, which can be used for accurately and rapidly measuring the position of a hole.
In order to achieve the purpose, the invention adopts the technical scheme that:
a hole site measuring device comprises a guide column, a measuring head, a zero alignment ring, a front end fixing ring, a middle fixing ring, a rear end fixing ring and a measuring component, wherein the measuring component comprises a measuring rod and a dial indicator, the measuring head of the dial indicator is in contact with the tail end of the measuring rod, and a disc is arranged in the middle of the guide column; the measuring head is installed at the lower end of the guide column, the upper end face of the measuring head is in contact with the lower end face of the front end fixing ring, the middle fixing ring is installed on the front end fixing ring, the disc in the middle of the guide column is located inside the middle fixing ring, the rear end fixing ring is installed on the middle fixing ring, the measuring component is arranged on the side face surrounding the rear end fixing ring, the measuring rod of the measuring component is in contact with the top of the guide column, and the zero-alignment ring is sleeved on the front end fixing ring and the measuring head.
According to the invention, a further preferable technical scheme of the hole site measuring device is as follows: the guide post is cylindrical, the diameter of the lower end of the guide post is reduced to form a step, a disc is arranged in the middle of the guide post, the diameter of the upper end of the guide post is increased to form a post head, the post head is located at the center of the rear end fixing ring, and the circumference of the post head is in contact with the measuring rod.
According to the invention, a further preferable technical scheme of the hole site measuring device is as follows: the diameter of the lower end of the guide column is reduced to form a step, the spring A is arranged on the step, the top end of the measuring head is provided with a cylindrical recess, the spring A is arranged at the lower end of the guide column and then arranged in the cylindrical recess space of the measuring head, the upper portion of the measuring head is provided with a transverse through hole, a cylindrical pin A is arranged in the through hole, and the cylindrical pin A penetrates through the lower end of the guide column to fix the measuring head on the guide column.
According to the invention, a further preferable technical scheme of the hole site measuring device is as follows: the two ends of a disc in the middle of the guide post are provided with steel ball fixing rings, the steel ball fixing rings are located inside the middle fixing ring, the diameter of each steel ball fixing ring is equal to the inner diameter of the middle fixing ring, the steel ball fixing rings are arranged in the two end faces of the middle fixing ring, steel ball control is uniformly distributed on the steel ball fixing rings in a surrounding mode, steel balls are arranged in steel ball holes, and the highest point of each steel ball is flush with the two end faces of the.
According to the invention, a further preferable technical scheme of the hole site measuring device is as follows: the front end fixing ring is a disk with a second order, a small step is in contact with the measuring head, the zero-alignment ring is sleeved on the small step and the measuring head, six magnetic steel mounting holes are distributed on the large step around the small step, a copper sleeve is arranged in each magnetic steel mounting hole, magnetic steel is arranged in each copper sleeve, the copper sleeve is as high as the large step of the front end fixing ring, two ends of the copper sleeve are parallel and level after the copper sleeve is mounted in place, the lower end of the magnetic steel is parallel and level with the lower end of the large step, and the upper end of the magnetic steel is located.
According to the invention, a further preferable technical scheme of the hole site measuring device is as follows: four arc grooves are uniformly distributed on the circumference of the upper end face of the rear end fixing ring, screws are arranged in the arc grooves, the front end fixing ring, the middle fixing ring and the rear end fixing ring are connected together through the screws, four holes are uniformly distributed in the middle of the side face of the rear end fixing ring in a surrounding mode, and the measuring assembly is arranged in the holes.
According to the invention, a further preferable technical scheme of the hole site measuring device is as follows: the measuring assembly further comprises a blocking sleeve and a guide sleeve, the blocking sleeve is arranged in two adjacent holes in the rear end fixing ring, a measuring rod is arranged in the blocking sleeve, a blocking sleeve nut is arranged on the outer side of the blocking sleeve, the guide sleeve is arranged in the other two adjacent holes in the rear end fixing ring, the measuring rod is arranged in the guide sleeve, a locking nut is arranged on the outer side of the guide sleeve, a locking sleeve is arranged at the joint of the guide sleeve and the locking nut, the locking sleeve is located in the hollow interior of the guide sleeve and the locking nut, the dial indicator is fixedly arranged under the combined action of the guide sleeve, the locking nut and the locking sleeve, and a cover plate.
According to the invention, a further preferable technical scheme of the hole site measuring device is as follows: the measuring rod is provided with a disc at the contact position with the column head, and the other end of the measuring rod is arranged in the blocking sleeve or the guide sleeve after the spring B is arranged in the measuring rod in a penetrating way.
According to the invention, a further preferable technical scheme of the hole site measuring device is as follows: cylindrical pins B are arranged among the front end fixing ring, the middle fixing ring and the rear end fixing ring, and the number of the cylindrical pins B is two and the cylindrical pins B are symmetrically arranged.
According to the invention, a further preferable technical scheme of the hole site measuring device is as follows: the rear end of the measuring head is provided with a distance sensor and a signal sending device, and the signal sending device is connected with an upper computer.
Compared with the prior art, the technical scheme of the invention has the following advantages/beneficial effects:
1. the device self is provided with to the zeroing, and initial zeroing operation is very convenient, only needs once to utilize the front end stationary ring to realize zeroing operation to the zeroing installation, uses the magnet steel to fix on the solid fixed ring of front end to the zeroing, need not to hold with the hand.
2. The design is for adopting two kinds of measuring methods of external percentage table and built-in sensor, satisfies more service environment, and external percentage table can adapt to permanent work, need not external energy or change battery, and built-in sensor measured data is convenient, directly sends the host computer with the result.
3. The position data with accurate hole positions can be obtained through a dial indicator and the like, and the hole position deviation amount can be recorded quickly, accurately and systematically in a datamation mode.
4. And by adopting a mechanical structure design, the device has fewer faults and is convenient to maintain.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a top view of the present invention.
Fig. 3 is a side view of the present invention.
Fig. 4 is a cross-sectional view of the present invention.
Fig. 5 is an oblique cross-sectional view of the present invention.
The labels in the figure are respectively: 1. the measuring device comprises a guide post 2, a measuring head 3, a spring A4, a cylindrical pin A5, a zero alignment ring 6, a front end fixing ring 7, a middle fixing ring 8, a rear end fixing ring 9, a cover plate 10, a steel ball fixing ring 11, a copper sleeve 12, magnetic steel 13, a steel ball 14, a measuring rod 15, a spring B16, a blocking sleeve 17, a blocking sleeve nut 18, a guide sleeve 19, a locking nut 20, a locking sleeve 21, a cylindrical pin B22 and a dial indicator.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are a part of the embodiments of the present invention, not all of the embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention. Thus, the detailed description of the embodiments of the present invention provided below is not intended to limit the scope of the invention as claimed, but is merely representative of selected embodiments of the invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it may not be further defined and explained in subsequent figures.
Example 1:
as shown in fig. 1, fig. 2, fig. 3, fig. 4 and fig. 5, a hole site measuring device comprises a guide column 1, a measuring head 2, a zero alignment ring 5, a front end fixing ring 6, a middle fixing ring 7, a rear end fixing ring 8 and a measuring component, wherein the measuring component comprises a measuring rod and a dial indicator, the measuring head of the dial indicator is in contact with the tail end of the measuring rod, and a disk is arranged in the middle of the guide column 1; the measuring head 2 is installed at the lower end of the guide column 1, the upper end face of the measuring head 2 is in contact with the lower end face of the front end fixing ring 6, the middle fixing ring 7 is installed on the front end fixing ring 6, the disc at the middle of the guide column 1 is located inside the middle fixing ring 7, the rear end fixing ring 8 is installed on the middle fixing ring 7, the measuring component is arranged on the side face of the rear end fixing ring 8, the measuring rod 14 of the measuring component is in contact with the top of the guide column 1, and the zero alignment ring 5 is sleeved on the front end fixing ring 6 and the measuring.
The guide post 1 is cylindrical, the diameter of the lower end of the guide post 1 is reduced to form a step, a disc is arranged in the middle of the guide post, the diameter of the upper end of the guide post 1 is increased to form a post head, the post head is located at the center of the rear end fixing ring 8, the circumference of the post head is in contact with the measuring rods 14, the number of the measuring rods 14 in the embodiment is 4, and two groups of measuring assemblies are arranged. Of course, the number of the measuring components can be set according to the actual detection requirement, and can also be set to be 2 times, such as 6, 8, etc.
The diameter of the lower end of the guide column 1 is reduced to form a step, a spring A3 is arranged on the step, a cylindrical recess is formed in the top end of the measuring head 2, the spring A3 is arranged at the lower end of the guide column 1 and then arranged in the cylindrical recess space of the measuring head 2, a transverse through hole is formed in the upper portion of the measuring head 2, a cylindrical pin A4 is arranged in the through hole, and the cylindrical pin A4 penetrates through the lower end of the guide column 1 to fix the measuring head 2 on the guide column 1.
The middle fixing ring 7 is a simple thick ring, the two ends of a disk at the middle part of the guide post 1 are provided with steel ball fixing rings 10, the guide post 1 is positioned inside the steel ball fixing rings 10, namely the steel ball fixing rings 10 are sleeved on the guide post 1, the steel ball fixing rings 10 are positioned inside the middle fixing rings 7 and have the same diameter as the inner diameter of the middle fixing rings 7, the steel ball fixing rings 10 are arranged in the two end faces of the middle fixing rings 7 after being installed, steel balls 13 are uniformly distributed on the steel ball fixing rings 10 in an annular mode, steel balls 13 are arranged in holes of the steel balls 13, the highest point of the steel balls 13 is flush with the two end faces of the middle fixing rings 7, the steel balls 13 can be slightly higher than the two end faces of the middle fixing rings 7, but no gap. The steel ball 13 is used for facilitating the circular motion of the guide post 1, and other reasonable structures can replace the design.
Front end fixed ring 6 is the disc of a second order, less ladder and 2 contacts of gauge head, 5 suits of zero ring are on less ladder, on great ladder six magnet steel 12 mounting holes are distributed around less ladder ring, settle copper sheathing 11 in magnet steel 12 mounting hole, settle magnet steel 12 in copper sheathing 11, copper sheathing 11 is as high as great ladder of front end fixed ring 6, both ends parallel and level after the installation targets in place, magnet steel 12 lower extreme and great ladder lower extreme parallel and level, the upper end is located copper sheathing 11 intermediate position.
The copper bush 11 is used for limiting the magnetic force line of the magnetic steel 12, so that the magnetic steel 12 only has magnetism at two open ends of the copper bush 11, the upper end only reaches the middle position of the copper bush 11, the magnetic force is small, the magnetism at the lower end is strong, the zero ring 5 can be attracted to the front end fixing ring 6, and the zero ring 5 is not required to be fixed and supported by hands. When the zero ring 5 is used, the zero ring is matched with the smaller step of the front end fixing ring 6, the outer diameter of the smaller step is equal to the inner diameter of the zero ring 5, the smaller step realizes the positioning of the zero ring 5, the diameter of the opening of the bottom end face of the zero ring 5 is equal to the outer diameter of the measuring head 22, the measuring head is limited, and zero operation is realized.
Four arc grooves are uniformly distributed on the circumference of the upper end face of the rear end fixing ring 8, screws are arranged in the arc grooves and connect the front end fixing ring 6, the middle fixing ring 7 and the rear end fixing ring 8 together, four holes are uniformly distributed in the middle of the side face of the rear end fixing ring 8 in a surrounding mode, and the measuring assembly is arranged in the holes.
The measuring component has two forms, one form is that a blocking sleeve structure and a guide sleeve structure are matched to form a group of measuring component, and the rear end fixing ring 8 of the implementation is provided with four mounting holes, namely two groups of measuring components are arranged. The measuring assembly further comprises a blocking sleeve 16 and a guide sleeve 18, the blocking sleeve is arranged in two adjacent holes in the rear end fixing ring, a measuring rod 14 is arranged in the blocking sleeve 16, a blocking sleeve nut 17 is arranged on the outer side of the blocking sleeve 16, guide sleeves 18 are arranged in the other two adjacent holes in the rear end fixing ring, the measuring rod 14 is arranged in the guide sleeves 18, locking nuts 19 are arranged on the outer sides of the guide sleeves 18, locking sleeves 20 are arranged at the joints of the guide sleeves 18 and the locking nuts 19, the locking sleeves 20 are located in the hollow parts of the guide sleeves 18 and the locking nuts 19, the dial indicators 22 are fixedly arranged under the combined action of the guide sleeves 18, the locking nuts 19 and the locking sleeves 20, a cover plate 9 is arranged on the upper portion of the rear end fixing ring 8, and the cover plate 9. The mode does not need an external power supply or a built-in battery, has long service time and ensures the reliability of the mechanical structure during use. Of course, the position of the blocking sleeve can also be set to be opposite to the hole for installation, which only causes that the whole hole position measuring device is very long and occupies large space.
Be provided with cylindric lock B21 between front end fixed ring 6, middle fixed ring 7, rear end fixed ring 8, cylindric lock B21 is two and be symmetrical arrangement, and cylindric lock B21 plays the fixed ring 6 of front end, middle fixed ring 7, the fixed ring 8's of rear end fixed ring positioning action.
The contact position of the measuring rod 14 and the column cap is provided with a disc, the other end of the measuring rod 14 is arranged in the blocking sleeve 16 or the guide sleeve 18 after the spring B15 is arranged in the measuring rod 14 in a penetrating mode, and the disc can facilitate the fine movement of the guide column 1 in any direction to influence the movement of the measuring rod 14 so as to read data.
Example 2:
in this embodiment, on the basis of embodiment 1, a second form of a measuring component is formed by improving the measuring component, the specifically adopted design is that electronization is realized by adopting a distance sensor, the measuring component cancels a dial indicator 22 and related dial indicator installation components, such as a guide sleeve 18, a locking nut 19 and a locking sleeve 20, and the distance sensor and a signal sending device are additionally arranged at the rear end of the measuring head 2.
The using method comprises the following steps: fix hole site measuring device on the support, make hole site measuring device can only guarantee simultaneously that hole site measuring device and required measuring hole site are in same vertical line from top to bottom vertical migration, take off zero ring, make the gauge head can remove to the optional position, descend hole site measuring device's height, let the gauge head with wait to detect the hole position coincidence, if the position in hole has the condition of skew this moment, the hole will make the gauge head take place the skew, the skew of side head is conducted on the measuring staff through the guide post, the measuring staff contacts with percentage table or sensor, can read the detection to the concrete numerical value of skew, the realization is measured the skew condition in hole's position, come out the concrete skew data precision measurement of hole site, can the systematic record of carrying on. When stopping using, install good zero ring, guarantee to adsorb on the solid fixed ring of front end to zero ring, prevent that the gauge head from rocking, receiving the condition such as striking and influencing the precision.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present invention.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The above is only a preferred embodiment of the present invention, and it should be noted that the above preferred embodiment should not be considered as limiting the present invention, and the protection scope of the present invention should be subject to the scope defined by the claims. It will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the spirit and scope of the invention, and these modifications and adaptations should be considered within the scope of the invention.
Claims (10)
1. The hole site measuring device is characterized by comprising a guide column, a measuring head, a zero alignment ring, a front end fixing ring, a middle fixing ring, a rear end fixing ring and a measuring component, wherein the measuring component comprises a measuring rod and a dial indicator, the measuring head of the dial indicator is in contact with the tail end of the measuring rod, and a disc is arranged in the middle of the guide column; the measuring head is installed at the lower end of the guide column, the upper end face of the measuring head is in contact with the lower end face of the front end fixing ring, the middle fixing ring is installed on the front end fixing ring, the disc in the middle of the guide column is located inside the middle fixing ring, the rear end fixing ring is installed on the middle fixing ring, the measuring component is arranged on the side face surrounding the rear end fixing ring, the measuring rod of the measuring component is in contact with the top of the guide column, and the zero-alignment ring is sleeved on the front end fixing ring and the measuring head.
2. The hole site measuring device of claim 1, wherein the guiding post is cylindrical, the diameter of the lower end of the guiding post is reduced to form a step, the middle part of the guiding post is provided with a disk, the diameter of the upper end of the guiding post is increased to form a post head, the post head is positioned at the center of the rear end retaining ring, and the circumference of the post head is contacted with the measuring rod.
3. The hole site measuring device of claim 2, wherein the diameter of the lower end of the guide post is reduced to form a step, a spring A is arranged on the step, the top end of the measuring head is provided with a cylindrical recess, the lower end of the guide post is arranged in the cylindrical recess space of the measuring head after being provided with the spring A, the upper part of the measuring head is provided with a transverse through hole, a cylindrical pin A is arranged in the through hole, and the cylindrical pin A penetrates through the lower end of the guide post to fix the measuring head on the guide post.
4. A hole site measuring device as claimed in any one of claims 1-3, wherein steel ball fixing rings are arranged at two ends of the disk at the middle part of the guide post, the steel ball fixing rings are positioned inside the middle fixing ring and have the same diameter as the inner diameter of the middle fixing ring, the steel ball fixing rings are positioned in two end faces of the middle fixing ring after being installed, steel ball controls are uniformly distributed on the steel ball fixing rings in a surrounding manner, steel balls are arranged in the steel ball holes, and the highest points of the steel balls are flush with the two end faces of the middle fixing ring.
5. The hole site measuring device of claim 1, wherein the front end fixing ring is a second-order disk, the smaller step is in contact with the measuring head, the zero-alignment ring is sleeved on the smaller step and the measuring head, six magnetic steel mounting holes are distributed on the larger step around the smaller step, a copper sleeve is arranged in the magnetic steel mounting holes, the magnetic steel is arranged in the copper sleeve, the copper sleeve is as high as the larger step of the front end fixing ring, the two ends of the copper sleeve are flush after the mounting is in place, the lower end of the magnetic steel is flush with the lower end of the larger step, and the upper end of the magnetic steel is located in the middle of the copper sleeve.
6. The hole site measuring device of claim 1, wherein four arc-shaped grooves are uniformly distributed on the circumference of the upper end surface of the rear end fixing ring, screws are arranged in the arc-shaped grooves, the screws connect the front end fixing ring, the middle fixing ring and the rear end fixing ring together, four holes are uniformly distributed in the middle of the side surface of the rear end fixing ring in a surrounding manner, and the measuring assembly is arranged in the holes.
7. The hole site measuring device of claim 6, wherein the measuring assembly further comprises a blocking sleeve and a guide sleeve, the blocking sleeve is arranged in two adjacent holes on the rear end fixing ring, a measuring rod is arranged in the blocking sleeve, a blocking sleeve nut is arranged outside the blocking sleeve, the guide sleeve is arranged in the other two adjacent holes on the rear end fixing ring, the measuring rod is arranged in the guide sleeve, a locking nut is arranged outside the guide sleeve, a locking sleeve is arranged at the joint of the guide sleeve and the locking nut, the locking sleeve is positioned in the hollow inner part of the guide sleeve and the locking nut, the guide sleeve, the locking nut and the locking sleeve jointly act to install and fix the dial indicator, and a cover plate is arranged on the upper part of the rear end fixing ring.
8. The hole site measuring device of claim 1, wherein two cylindrical pins B are arranged symmetrically between the front end fixing ring, the middle fixing ring and the rear end fixing ring.
9. The hole site measuring device of claim 2, wherein the measuring rod is provided with a disc at the position contacting with the column head, and the other end of the measuring rod is arranged in the plugging sleeve or the guide sleeve after the spring B is arranged in the measuring rod in a penetrating way.
10. The hole site measuring device of claim 1, wherein a distance sensor and a signal transmitting device are arranged at the rear end of the measuring head, and the signal transmitting device is connected with an upper computer.
Priority Applications (1)
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CN202010459335.5A CN111678395A (en) | 2020-05-27 | 2020-05-27 | Hole site measuring device |
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CN202010459335.5A CN111678395A (en) | 2020-05-27 | 2020-05-27 | Hole site measuring device |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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CN115060132A (en) * | 2022-05-16 | 2022-09-16 | 上汽通用五菱汽车股份有限公司 | Hole position measuring device |
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2020
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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CN115060132A (en) * | 2022-05-16 | 2022-09-16 | 上汽通用五菱汽车股份有限公司 | Hole position measuring device |
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