CN216308929U - Multi-petal type inner diameter measuring head and pneumatic measuring instrument with same - Google Patents
Multi-petal type inner diameter measuring head and pneumatic measuring instrument with same Download PDFInfo
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- CN216308929U CN216308929U CN202122884850.0U CN202122884850U CN216308929U CN 216308929 U CN216308929 U CN 216308929U CN 202122884850 U CN202122884850 U CN 202122884850U CN 216308929 U CN216308929 U CN 216308929U
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- measuring head
- thimble
- inside diameter
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Abstract
The utility model relates to a multi-petal type inner diameter measuring head and a pneumatic measuring instrument with the same, comprising: the measuring head is provided with a through hole in the center and comprises a plurality of measuring sub heads; the thimble is inserted and located in the through-hole and the thimble can move on the axis of through-hole, the thimble with the through-hole sets up cooperatedly, and when the thimble leans on the end of through-hole, make a plurality of measure the branch open, a plurality of gas circuits of measuring set up respectively in measure the branch. The utility model changes the unchangeable structure of the traditional measuring head, sets the measuring head into a plurality of measuring sub-heads and jointly forms the measuring head which can be elastically changed, thereby realizing the technical effect of facilitating the entering and exiting of workpieces.
Description
Technical Field
The utility model relates to the field of inner diameter measurement, in particular to a multi-section inner diameter measuring head and a pneumatic measuring instrument with the same.
Background
In the machining industry, the inner diameter of a cylindrical workpiece is measured by combining a plug gauge type measuring head with a pneumatic measuring instrument. In order to improve the measurement accuracy, the traditional measuring head of the pneumatic measuring instrument for measuring the inner diameter of a cylindrical workpiece is a solid cylinder which is made into a shape which is matched with the standard size of the inner diameter of the workpiece only with a slight difference. Therefore, in the measurement use, the operator often needs to change the angle of a workpiece for measuring a workpiece for a plurality of times to plug the measuring head into the inner hole of the workpiece for measurement. Therefore, the measuring efficiency is influenced, and the abrasion and the damage of the measuring head are easily caused. The air gauge measuring head belongs to a very precise device with higher value, and the production cost of an enterprise is increased undoubtedly if the air gauge measuring head is worn quickly or damaged.
The utility model aims to design a multi-petal type inner diameter measuring head and a pneumatic measuring instrument with the same aiming at the problems in the prior art.
SUMMERY OF THE UTILITY MODEL
In view of the problems in the prior art, the present invention provides a multi-piece inside diameter measuring head and a pneumatic gauge with the same, which can effectively solve the problems in the prior art.
The technical scheme of the utility model is as follows:
a multi-lobed inside diameter probe comprising:
the measuring head is provided with a through hole in the center and comprises a plurality of measuring sub heads;
the thimble is inserted in the through hole and can move on the axis of the through hole, the thimble and the through hole are matched, and when the thimble leans against the tail end of the through hole, a plurality of measuring branches are opened.
And the plurality of measuring gas circuits are respectively arranged on the measuring branch heads.
Furthermore, the outer side surfaces of the measuring branch heads form a cylinder side surface, and when the thimble abuts against the tail end of the through hole, the diameter of the cylinder formed by the outer side surfaces of the measuring branch heads is increased.
Further, the upper part of the through hole is columnar, and the lower part of the through hole is narrowed; the bottom end of the ejector pin is arranged to be a narrowing structure matched with the lower part of the through hole.
Furthermore, the measuring taps are connected to an elastic piece, and when the thimble is not abutted against the tail end of the through hole, the elastic piece enables the measuring taps to be in a contraction state.
Furthermore, the elastic part is a cylindrical structure formed by a plurality of elastic sub-parts, the top ends of the elastic sub-parts are connected, the bottom ends of the elastic sub-parts are respectively connected to the measuring sub-heads, and the inner diameter of the elastic part is the same as that of the through hole.
Furthermore, the measurement gas circuit comprises a gas inlet end and a gas outlet end, and the gas outlet end is arranged on the side surface of the measurement branch head.
Furthermore, the measurement gas circuit comprises an upper gas circuit and a lower gas circuit, and the gas outlet end of the upper gas circuit is arranged on the upper side of the gas outlet end of the lower gas circuit.
The air gauge comprises the multi-segment inner diameter measuring head, and the air inlet end of the measuring air path is connected to a corresponding air source.
Further, the ejector pins are driven by corresponding driving mechanisms.
The utility model has the advantages that:
the utility model changes the unchangeable structure of the traditional measuring head, sets the measuring head into a plurality of measuring sub-heads and jointly forms the measuring head which can be elastically changed, thereby realizing the technical effect of facilitating the entering and exiting of workpieces. After the measuring head is placed into a workpiece with a cylindrical inner side surface, the thimble starts to abut against the tail end of the through hole, so that the measuring head is opened to enlarge the diameter of the measuring head, the diameter of the enlarged measuring head is almost equal to the inner diameter of the workpiece, or the diameter of the enlarged measuring head is slightly smaller than the inner diameter of the workpiece, so that the measuring head matched with the inner diameter of the workpiece is formed by opening the measuring head, and the measuring head is used for measuring the inner diameter of the workpiece through the air pressure change of the air circuit.
The lower part of the through hole is provided with a taper hole, and the tail end of the thimble is provided with a tip cone matched with the taper hole, so that the measuring head is expanded under the abutting action of the thimble. The size change of the measuring head can be accurately controlled through the structure, and the measuring head is suitable for workpieces with various structures.
Drawings
Fig. 1 is a schematic structural diagram of the first embodiment.
Fig. 2 is a schematic view of the measuring head and the elastic member.
Fig. 3 is a bottom view of fig. 1.
Fig. 4 is a sectional view a-a of fig. 3.
Fig. 5 is a schematic diagram of the working principle.
Detailed Description
To facilitate understanding of those skilled in the art, the structure of the present invention will now be described in further detail by way of examples in conjunction with the accompanying drawings:
example one
Referring to fig. 1-4, a multi-lobed id probe comprises:
the measuring head 1 is provided with a through hole 102 in the center of the measuring head 1, and the measuring head 1 comprises a plurality of measuring sub heads 101; the measuring head 1 includes multi-lobe measuring taps 101, in this embodiment, the number of the measuring taps 101 is 3, and in other embodiments, the number of the measuring taps 101 may also be 2, 4, 5, and the like, which is not limited herein. And slits are present between the individual measuring taps 101 to facilitate their merging or spreading.
The thimble 2 is inserted into the through hole 102, the thimble 2 can move on the axis of the through hole 102, the thimble 2 and the through hole 102 are arranged in a matching manner, and when the thimble 2 abuts against the tail end of the through hole 102, the measuring sub-heads 101 are opened. The thimble 2 is used for matching with the measuring head 1, and when the measuring head 1 is not put into a workpiece with a cylindrical inner side surface, the thimble 2 does not lean against the tail end of the through hole 102, so that the measuring head 1 is combined, the diameter of the measuring head is reduced, and the measuring head is convenient to put into the workpiece. After the measuring head 1 is put into a workpiece with a cylindrical inner side surface, the thimble 2 starts to abut against the tail end of the through hole 102, so that the measuring head 1 is opened to enlarge the diameter of the measuring head 1, the diameter of the enlarged measuring head 1 is almost equal to the inner diameter of the workpiece, or the diameter of the enlarged measuring head 1 is slightly smaller than the inner diameter of the workpiece, so that the measuring head 1 matched with the inner diameter of the workpiece is opened to form the measuring head 1 for measuring the inner diameter of the workpiece through the air pressure change of the air path.
And the plurality of measuring gas circuits 3 are respectively arranged on the measuring branch heads 101. The theory of operation of pneumatic measurement internal diameter belongs to prior art, approximate theory of operation is, the measurement gas circuit 3 of measuring head 1 is connected to the air supply and gives vent to anger through the end of giving vent to anger, the atmospheric pressure change of control system monitoring gas circuit, if the internal diameter circularity of work piece is not enough, the internal diameter of work piece is some local great places less, then the interval diverse between the internal surface of the end of giving vent to anger of measuring gas circuit 3 and work piece, then measure the atmospheric pressure also diverse of gas circuit 3, the internal diameter situation of change of work piece can be learnt through the atmospheric pressure change of measuring the gas circuit. Meanwhile, in order to facilitate air outlet at the air outlet end, the measuring head 1 is communicated with a channel at the edge of the air outlet end and used for leading the air flow at the air outlet end out to the outside.
Furthermore, the outer side surfaces of the measuring sub heads 101 form a cylinder side surface, and when the thimble 2 abuts against the tail end of the through hole, the diameter of the cylinder formed by the outer side surfaces of the measuring sub heads 101 is increased.
Further, the upper portion of the through hole 102 is columnar, and the lower portion of the through hole 102 is narrowed; the bottom end of the thimble 2 is provided with a narrowing structure which is matched with the lower part of the through hole 102.
Furthermore, the measuring taps 101 are all connected to the elastic member 4, and when the thimble 2 is not abutted against the end of the through hole 102, the elastic member 4 makes the measuring taps 101 in a contracted state.
Furthermore, the elastic part 4 is a cylindrical structure formed by a plurality of elastic parts, the top ends of the elastic parts are connected, the bottom ends of the elastic parts are respectively connected to the measuring part head 101, and the inner diameter of the elastic part 4 is the same as that of the through hole 102.
In this embodiment, the elastic member 4 is connected to each of the measuring taps 101, so that the measuring taps 101 are naturally contracted and gathered together when not being stressed, and the elastic member 4 also provides elastic force so that the measuring taps 101 can be expanded or contracted, and the elastic member 4 may be made of metal, plastic or other materials with certain elastic force and hard force. Meanwhile, the elastic member 4 constitutes a space for allowing the thimble 2 to move by a cylindrical structure composed of a plurality of elastic sub-members, and a moving direction of the thimble 2 is defined to move between the elastic member 4 and the inside of the measuring head 1. The lower part of the through hole 102 is provided with a taper hole, and the tail end of the thimble 2 is provided with a tip cone matched with the taper hole, so that the measuring head is opened under the abutting action of the thimble 2.
Further, the measurement gas path 3 includes a gas inlet end 301 and a gas outlet end 302, and the gas outlet end 302 is disposed on a side surface of the measurement tap 101.
Further, the measurement gas circuit 3 comprises an upper gas circuit and a lower gas circuit, and the gas outlet end of the upper gas circuit is arranged on the upper side of the gas outlet end of the lower gas circuit. This is because, by forming a plurality of gas outlet ports 302, the inner diameters of the workpiece at a plurality of positions can be measured at the same time.
The working structure principle is as follows: the thimble 2 is inserted facing the through hole 102 of the measuring head 1, and under the interaction of the thimble and the through hole, the deformation x of the measuring head is controlled to reach the cylindrical surface required by the measuring air passage 3 of the measuring head 1. The cylindrical surface of the measuring head is designed according to the tolerance requirement of a workpiece.
The design method for ensuring that the deformed measuring head can meet the cylindricity requirement comprises the following steps: referring to fig. 5, if the deformation is linear, the variation of the deformation calculated by controlling the y-axis stroke of the thimble can be controlled to meet the cylindricity requirement of the measuring head.
Example two
There is further provided a pneumatic measuring instrument including the multi-blade id measuring head of the first embodiment, wherein the air inlet end of the air path is connected to a corresponding air source.
Further, the ejector pins are driven by corresponding driving mechanisms.
The above description is only a preferred embodiment of the present invention, and all equivalent changes and modifications made in accordance with the claims of the present invention should be covered by the present invention.
Claims (9)
1. The utility model provides a multilobe formula internal diameter gauge head which characterized in that: the method comprises the following steps:
the measuring head is provided with a through hole in the center and comprises a plurality of measuring sub heads;
the thimble is inserted into the through hole and can move on the axis of the through hole, the thimble and the through hole are matched, and when the thimble abuts against the tail end of the through hole, the plurality of measuring branches are opened;
and the plurality of measuring gas circuits are respectively arranged on the measuring branch heads.
2. A multi-lobed inside diameter probe as claimed in claim 1, wherein: and when the thimble abuts against the tail end of the through hole, the diameter of the cylinder formed by the outer side surface of the measuring branch is increased.
3. A multi-lobed inside diameter probe as claimed in claim 1, wherein: the upper part of the through hole is columnar, and the lower part of the through hole is narrowed; the bottom end of the ejector pin is arranged to be a narrowing structure matched with the lower part of the through hole.
4. A multi-lobed inside diameter probe as claimed in claim 1, wherein: the measuring taps are connected to an elastic piece, and when the ejector pin does not abut against the tail end of the through hole, the elastic piece enables the measuring taps to be in a contraction state.
5. A multi-lobed inside diameter probe as claimed in claim 4, wherein: the elastic piece is a cylindrical structure formed by a plurality of elastic sub-pieces, the top ends of the elastic sub-pieces are connected, the bottom ends of the elastic sub-pieces are respectively connected to the measuring sub-heads, and the inner diameter of the elastic piece is the same as that of the through hole.
6. A multi-lobed inside diameter probe as claimed in claim 1, wherein: the measuring gas circuit comprises a gas inlet end and a gas outlet end, and the gas outlet end is arranged on the side surface of the measuring branch head.
7. A multi-lobed inside diameter probe as claimed in claim 6, wherein: the measuring gas circuit comprises an upper gas circuit and a lower gas circuit, and the gas outlet end of the upper gas circuit is arranged on the upper side of the gas outlet end of the lower gas circuit.
8. A pneumatic gauge, comprising: the multi-blade inside diameter measuring head comprises the multi-blade inside diameter measuring head of any one of claims 1 to 7, and the air inlet end of the measuring air path is connected to a corresponding air source.
9. An air-gauge according to claim 8, wherein: the ejector pins are driven by corresponding driving mechanisms.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122884850.0U CN216308929U (en) | 2021-11-23 | 2021-11-23 | Multi-petal type inner diameter measuring head and pneumatic measuring instrument with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122884850.0U CN216308929U (en) | 2021-11-23 | 2021-11-23 | Multi-petal type inner diameter measuring head and pneumatic measuring instrument with same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216308929U true CN216308929U (en) | 2022-04-15 |
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ID=81122693
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122884850.0U Active CN216308929U (en) | 2021-11-23 | 2021-11-23 | Multi-petal type inner diameter measuring head and pneumatic measuring instrument with same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216308929U (en) |
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2021
- 2021-11-23 CN CN202122884850.0U patent/CN216308929U/en active Active
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