CN219572980U

CN219572980U - Inner hole detector

Info

Publication number: CN219572980U
Application number: CN202320829428.1U
Authority: CN
Inventors: 常东生
Original assignee: Ningbo Haimande Measurement And Control Technology Co ltd
Current assignee: Ningbo Haimande Measurement And Control Technology Co ltd
Priority date: 2023-04-05
Filing date: 2023-04-05
Publication date: 2023-08-22
Anticipated expiration: 2033-04-05

Abstract

The utility model relates to an inner hole detector, which comprises: a housing; the translation detection frame comprises a hollowed-out base part, four deformation vertical plates, a first translation part and a second translation part, and a first parallelogram mechanism and a second parallelogram mechanism are formed. The detection assembly comprises a first detection piece and a second detection piece, and the first detection piece and the second detection piece at least partially penetrate out of the shell. The measuring assembly comprises a pressure sensor and an air pressure output assembly, the air pressure output assembly is arranged opposite to the pressure sensor, the air pressure output assembly is used for conveying air flow to the pressure sensor, and at least one of the first translation part and the second translation part translates under the action of air flow pressure of the air pressure output assembly. The pressure sensor detects the pressure value of the gas conveyed by the gas pressure output assembly, and the inner hole detector determines the inner hole diameter of the workpiece to be detected according to the pressure value, so that the detection precision is high and the detection efficiency is high.

Description

Inner hole detector

Technical Field

The utility model relates to the technical field of detection, in particular to an inner hole detector.

Background

After the processing of some parts with hole structures is completed, detection is needed to determine whether the pore diameter meets the processing standard. Among the commonly used measuring tools, there are tools for performing accurate degrees such as micrometer and the like, and also there are qualitative detection workpieces such as go-no-go gauges and the like; or by a three-coordinate measuring device.

Chinese patent CN112648921a discloses a hole part detector and a hole detecting method, the detector comprises a reference part, a driving part, a detecting part, an optical part, and an operation display part. Moving the perforated workpiece relative to a reference; the detecting part is contacted with the hole wall or a gas film is arranged between the detecting part and the hole wall and can swing around a fulcrum. The light spot changes with the movement of the perforated workpiece. The operation display section can display the spot position change or the information after the change. The light is coaxial or not coaxial with the central line of the hole, the detecting rod and the detecting head can be provided with holes, and the detecting head and the hole wall of the detected workpiece form an annular wedge-shaped space. The hole detection method comprises a hole detection instrument and comprises the following steps: firstly, placing a workpiece with a hole, and emitting light; a second step of moving the holed workpiece or the detecting portion along the reference portion; thirdly, calculating the shape and position errors or the size errors or the roughness of the hole according to the spot information.

In the above detection method, under the condition of large detection amount, not only the technical problem of low detection efficiency is existed, but also the technical problem of error and omission of the detection value by adopting manual statistics is also existed, so improvement is needed.

Disclosure of Invention

In order to overcome the problems in the related art, the embodiment of the utility model provides an inner hole detector.

According to a first aspect of an embodiment of the present utility model, there is provided an inner bore detector, the inner bore detector comprising:

a housing;

the translation detection frame comprises a hollowed-out formed basic part, four deformation vertical plates, a first translation part and a second translation part, wherein the first translation part, the basic part and two deformation vertical plates form a first parallelogram mechanism, and the second translation part, the basic part and the remaining two deformation vertical plates form a second parallelogram mechanism;

the detection assembly comprises a first detection piece arranged on the first translation part and a second detection piece arranged on the second translation part, and the first detection piece and the second detection piece at least partially penetrate out of the shell;

the measuring assembly comprises a pressure sensor arranged on the first translation part and an air pressure output assembly arranged on the second translation part, wherein the air pressure output assembly is arranged opposite to the pressure sensor and is used for conveying air flow to the pressure sensor, and at least one of the first translation part and the second translation part translates under the action of air flow pressure of the air pressure output assembly.

In an embodiment, the deformation riser is a plate-shaped thin-walled member, and the thickness of the deformation riser is less than or equal to 1mm.

In an embodiment, the end surfaces of the first translation part and the second translation part are spaced by a preset distance, and the relative movement amount of the first translation part and the second translation part is 0.1 mm-3 mm.

In an embodiment, the first translation portion is provided with a positioning groove and a positioning hole located at the bottom of the positioning groove, the first detection piece is embedded into the positioning groove, and the fastening piece passes through the positioning hole and is locked on the first detection piece.

In an embodiment, the groove walls on two sides of the positioning groove are provided with inclined surfaces, the first detecting piece is in sliding fit with the inclined surfaces, and the length direction of the positioning groove is parallel to the parallel direction of the first translation part.

In an embodiment, the first translation portion is provided with a mounting hole, the pressure sensor is inserted from the mounting hole, and a pressure sensing surface of the pressure sensor is flush with or exceeds an end surface of the first translation portion.

In an embodiment, the air pressure output assembly comprises a nozzle member and a conduit connected to the nozzle member, the second translation portion is provided with an air outlet hole and a clearance hole penetrating through the second translation portion, the nozzle member is mounted on the air outlet hole, and the conduit penetrates out along the clearance hole.

In an embodiment, the detection assembly comprises a fixing seat connected to the casing in a plugging manner, the fixing seat is provided with a detection hole, the first detection piece and the second detection piece penetrate out of the detection hole to form a columnar detection column, and a detection gap is formed between a circumferential detection surface of the detection column and a hole wall of the detection hole.

In an embodiment, the first detecting member includes a connecting portion, a semi-cylinder protruding from the connecting portion, and a locking portion penetrating through the connecting portion, and opposite sides of the connecting portion are inclined surfaces.

In an embodiment, the first probe and the second probe are symmetrically arranged.

The technical scheme provided by the embodiment of the utility model can comprise the following beneficial effects: the translation detection frame is a structural member made of integral materials, the first translation part and the second translation part can relatively translate under the action of the gas pressure output assembly, so that the first detection part and the second detection part are driven to relatively translate until the first detection part and the second detection part are propped against the inner hole wall of the workpiece to be detected, and then the movement is stopped. The pressure sensor detects the pressure value of the gas conveyed by the gas pressure output assembly, and the inner hole detector determines the inner hole diameter of the workpiece to be detected according to the pressure value, so that the detection precision is high and the detection efficiency is high. And moreover, the inner hole detector can record detection data of the pressure sensor, and the data recording is convenient and accurate.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the utility model as claimed.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the utility model and together with the description, serve to explain the principles of the utility model.

Fig. 1 is a schematic diagram illustrating a structure of an inner bore detector according to an exemplary embodiment.

Fig. 2 is a schematic diagram illustrating a cross-sectional structure of a bore detector according to an exemplary embodiment.

Fig. 3 is a schematic structural view of a translation detection frame according to an exemplary embodiment.

Fig. 4 is a schematic diagram illustrating an exploded construction of the bore detector according to an exemplary embodiment.

Fig. 5 is a schematic diagram illustrating the structure of the bore detector at the measurement assembly, according to an exemplary embodiment.

Fig. 6 is a schematic structural view of a first probe shown according to an exemplary embodiment.

Fig. 7 is a schematic diagram showing a structure in which a workpiece to be measured is fitted to a bore detector, according to an exemplary embodiment.

In the figure, a housing 10; a base 11; a cover 12; a detection assembly 20; a first detecting member 21; a connection portion 211; a semi-cylinder 212; a locking part 213; a second probe 22; a fixing base 23; a detection hole 231; translating the detection frame 30; a first translation part 31; a positioning groove 311; positioning holes 312; a mounting hole 313; a second translation portion 32; a clearance hole 321; an air outlet hole 322; a base portion 33; a deformation riser 34; a pressure sensor 40; a pneumatic output assembly 50; a nozzle member 51; a workpiece 60.

Detailed Description

Wherein the drawings are for illustrative purposes only and are shown in schematic, non-physical, and not intended to be limiting of the present patent; for the purpose of better illustrating embodiments of the utility model, certain elements of the drawings may be omitted, enlarged or reduced and do not represent the size of the actual product; it will be appreciated by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.

The same or similar reference numbers in the drawings of embodiments of the utility model correspond to the same or similar components; in the description of the present utility model, it should be understood that, if the terms "upper", "lower", "left", "right", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, only for convenience in describing the present utility model and simplifying the description, rather than indicating or implying that the apparatus or elements being referred to must have a specific orientation, be constructed and operated in a specific orientation, so that the terms describing the positional relationships in the drawings are merely for exemplary illustration and should not be construed as limiting the present patent, and that the specific meaning of the terms described above may be understood by those of ordinary skill in the art according to specific circumstances.

In the description of the present utility model, unless explicitly stated and limited otherwise, the term "coupled" or the like should be interpreted broadly, as it may be fixedly coupled, detachably coupled, or integrally formed, as indicating the relationship of components; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between the two parts or interaction relationship between the two parts. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

As shown in fig. 1 to 5, the present utility model provides an inner hole detector, which includes a housing 10, a translation detecting frame 30 installed in the housing 10, a detecting assembly 20 installed in the translation detecting frame 30, and a measuring assembly. The shell 10 is of a hollow box structure, and the periphery and the top of the shell 10 are made of thin-wall plate materials. The casing 10 comprises a base 11 and a cover body 12 fixed on the base 11, the translation detection frame 30 is mounted on the base 11, the cover body 12 is covered on the translation detection frame 30, and part of the detection assembly 20 penetrates out of the cover body 12.

The translation detection frame 30 comprises a hollowed-out base part 33, four deformation vertical plates 34, a first translation part 31 and a second translation part 32. The first translation portion 31, the base portion 33, and the two deformation risers 34 constitute a first parallelogram mechanism, and the second translation portion 32, the base portion 33, and the remaining two deformation risers 34 constitute a second parallelogram mechanism.

Preferably, the translation detecting frame 30 is formed by processing an integral structural member, the structure of the connecting part 211 is problematic, the material performance of each part is consistent, and the consistency of elastic deformation performance is good. Alternatively, the deformation riser 34 is embedded in the base portion 33, the first translation portion 31, and the second translation portion 32, thereby constituting an embedded structure, and the overall uniformity is high.

Wherein four deformation risers 34 are arranged in parallel, preferably the deformation risers 34 are perpendicular to the base 33 in unstressed condition. The first translation portion 31 is located at the top of two adjacent deformation risers 34, and the two deformation risers 34 are close to two ends of the first translation portion 31. The second translation portion 32 is located at the top of the remaining two adjacent deformed riser 34, and the two deformed riser 34 are close to two ends of the second translation portion 32.

The first translation portion 31 and the second translation portion 32 are parallel to the base portion 33, respectively, and the first translation portion 31 and the second translation portion 32 are at the same horizontal level. Specifically, the top surface of the first translating portion 31 and the top surface of the second translating portion 32 are on the same plane in the unstressed condition. In an alternative embodiment, the deformation riser 34 is a plate-like thin-walled member. The two adjacent deformation risers 34 are arranged in parallel, the elastic deformation performance of the two deformation risers is consistent, and when the first translation portion 31 and the second translation portion 32 are subjected to lateral force, the deformation amounts of the two deformation risers 34 are consistent, so that the first translation portion 31 and the second translation portion 32 are always parallel to the base portion 33. Accordingly, the deformation riser 34 has a small thickness and is more excellent in deformation performance. Preferably, the deformed riser 34 has a thickness of less than or equal to 1mm. For example, the thickness of the deformation riser 34 is set to 0.2mm, 0.3mm, 0.5mm, 0.6mm, 0.8mm, 1mm, or the like.

The detecting assembly 20 includes a first detecting member 21 mounted to the first translating portion 31 and a second detecting member 22 mounted to the second translating portion 32, the first detecting member 21 and the second detecting member 22 at least partially penetrating the casing 10. The first detecting element 21 and the second detecting element 22 translate along with the elastic deformation of the translation detecting frame 30, wherein the first detecting element 21 and the second detecting element 22 penetrate out of the casing 10 for detecting the inner hole diameter of the workpiece 60 to be detected. Specifically, when the first translation portion 31 and the second translation portion 32 are relatively far away, the first probe 21 and the second probe 22 are synchronously far away until the first probe 21 and the second probe 22 are abutted against the hole wall of the hole of the workpiece 60 to be measured to stop, and accordingly, the expanded diameters of the first probe 21 and the second probe 22 are the diameters of the hole. It should be noted that, even if the first translation portion 31 and the second translation portion 32 are relatively far apart, the first detecting member 21 and the second detecting member 22 keep the translation in the horizontal direction based on the principle of the parallelogram synchronous deformation, and even if there is a drop in the height direction, the aperture detection accuracy in the horizontal direction is not affected.

The measuring assembly comprises a pressure sensor 40 mounted on the first translation part 31 and an air pressure output assembly 50 mounted on the second translation part 32, wherein the air pressure output assembly 50 is arranged opposite to the pressure sensor 40. The air pressure output assembly 50 is configured to convey an air flow to the pressure sensor 40, and at least one of the first translation portion 31 and the second translation portion 32 translates under the air flow pressure of the air pressure output assembly 50.

In the present embodiment, the first translation portion 31 and the second translation portion 32 can translate relatively under the action of the gas pressure output assembly 50, so as to drive the first detecting member 21 and the second detecting member 22 to translate relatively, until the first detecting member 21 and the second detecting member 22 abut against the inner hole wall of the workpiece 60 to be measured, and then stop moving. The pressure sensor 40 detects the pressure value of the gas delivered by the gas pressure output assembly 50, and the inner hole detector determines the inner hole diameter of the workpiece 60 to be detected according to the pressure value, so that the detection accuracy and the detection efficiency are high. In addition, the inner hole detector can record the detection data of the pressure sensor 40, and the data recording is convenient and accurate.

In an embodiment, the end surfaces of the first translation portion 31 and the second translation portion 32 are spaced apart by a predetermined distance, and the relative movement amount of the first translation portion 31 and the second translation portion 32 is 0.1mm to 3mm. The first translation part 31 and the second translation part 32 are arranged at opposite intervals, and the end surfaces of the first translation part 31 and the second translation part 32 are provided with a matching space, and the matching space enables the first translation part 31 and the second translation part 32 to move independently and not to abut together. And, the mating spacing between the first translating portion 31 and the second translating portion 32 serves to provide a response space for the assembly and sensing of the pneumatic output assembly 50 and the pressure sensor 40. The air pressure output assembly 50 drives the second translation portion 32 to translate under the air pressure output effect, and accordingly, the first translation portion 31 translates away from the second translation portion 32 under the air pressure effect of the air pressure output assembly 50. The maximum translation amount of the first translation part 31 and the second translation part 32 is larger than the maximum value of the inner diameter of the workpiece 60 to be measured, so that the detection range of the workpiece 60 is satisfied, and the movement range of the first translation part 31 and the second translation part 32 can be minimized, so that the consistency of parallel movement is maintained. Alternatively, the relative movement amounts of the first translation portion 31 and the second translation portion 32 are 0.1mm, 0.3mm, 0.5mm, 0.8mm, 1mm, 1.5mm, 2mm, 2.5mm, 3mm, and the like.

Wherein, the first translation portion 31 is provided with a mounting hole 313, and the pressure sensor 40 is inserted from the mounting hole 313. The pressure sensing surface of the pressure sensor 40 faces the second translating part 32 so that the gas outputted from the gas pressure output assembly 50 mounted on the second translating part 32 directly acts on the pressure sensing surface. Alternatively, the pressure sensing surface is perpendicular to the air flow output direction of the air pressure output assembly 50. Preferably, the pressure sensing surface is perpendicular to the translation direction of the first translation portion 31, and the first translation portion 31 translates under the pressure transmitted by the pressure sensing surface.

As shown in fig. 1 to 7, in order to increase the pressure range of the air pressure output assembly 50 acting on the pressure sensing surface, the pressure sensing surface of the pressure sensor 40 is flush with or exceeds the end surface of the first translation portion 31. The pressure sensing surface is opposite to the air pressure output assembly 50, and the pressure sensing surface is flush with or exceeds the end surface of the first translation portion 31, so that the air flow output by the air pressure output assembly 50 basically acts on the pressure sensing surface, the pressure value sensed by the pressure sensing surface is accurate and concentrated, and the obtained pressure change value is accurate. When the movement distance between the first translation part 31 and the second translation part 32 is increased, the pressure value sensed by the pressure sensing surface gradually decreases until the first detecting element 21 and the second detecting element 22 abut against the inner hole wall of the workpiece 60 to be detected, the pressure value sensed by the pressure sensing surface keeps a stable value, the pressure sensor 40 sends an electrical signal of the stable value, and the inner hole detector can calculate the inner hole diameter of the workpiece 60 to be detected according to the electrical signal and the built-in program.

The air pressure output assembly 50 is mounted on the second translation portion 32, specifically, the second translation portion 32 is provided with an air outlet hole 322 and a clearance hole 321 penetrating through the second translation portion 32, and a center line of the air outlet hole 322 is parallel to a translation direction of the second translation portion 32. The clearance hole 321 is of a long hole structure, the length direction of the clearance hole 321 is parallel to the translation direction of the second translation part 32, so that the weight of the second translation part 32 can be reduced, the air path layout can be facilitated, and the conduit is prevented from damaging the balance of the second translation part 32. The air pressure output assembly 50 includes a nozzle member 51 and a conduit connected to the nozzle member 51, the nozzle member 51 is mounted on the air outlet 322, and the conduit passes through the air-avoiding hole 321.

The first detecting element 21 is mounted on the first translating portion 31, and the second detecting element 22 is mounted on the second translating portion 32. Preferably, the first translation portion 31 is provided with a positioning slot 311 and a positioning hole 312 at the bottom of the positioning slot 311, the first detecting member 21 is embedded in the positioning slot 311, and the fastener passes through the positioning hole 312 and is locked to the first detecting member 21. The first parallelogram structure formed by the first translation part 31 and the deformation vertical plate 34 has a corresponding installation space, and the diameter of the installation hole 313 can meet the installation of the tool. And, the fastener penetrates from the locating hole 312 and is locked to the first detecting member 21, so that automatic alignment of the first detecting member 21 is achieved, and the locking effect is good. The sidewall of the first detecting member 21 and the positioning groove 311 are defined with each other, so that an accurate sliding guide direction is maintained and rotation is prevented.

Preferably, the groove walls on both sides of the positioning groove 311 are provided as inclined surfaces, the first detecting member 21 is slidably engaged with the inclined surfaces, and the length direction of the positioning groove 311 is parallel to the parallel direction of the first translation portion 31. The two inclined surfaces of the positioning groove 311 are approximately in a V-shaped structure, so that the first detecting member 21 can be automatically centered and positioned in the positioning groove 311. And the first detecting piece 21 slides along the length direction of the positioning groove 311 to adjust the relative position of the first detecting piece 21 and the first translation part 31, so that the repeatability is good and the installation accuracy is high.

Accordingly, the first detecting member 21 includes a connecting portion 211, a semi-cylinder 212 protruding from the connecting portion 211, and a locking portion 213 penetrating the connecting portion 211, and opposite sides of the connecting portion 211 are inclined surfaces. The connecting part 211 is inserted into the matching positioning groove 311 to form a complementary matching structure. The locking part 213 is in a threaded hole structure, and the fastener passes through the positioning hole 312 and is locked to the locking part 213, so as to realize the fixed connection between the first detecting member 21 and the first translation part 31.

Preferably, the first detecting member 21 and the second detecting member 22 are symmetrically disposed. The connection locking manner of the second detecting member 22 and the second translating portion 32 is substantially the same as that of the first detecting member 21 and the first translating portion 31, and it will be understood that the description thereof will not be repeated here.

Further, the detecting assembly 20 includes a fixing base 23 connected to the casing 10 in a plugging manner, and the fixing base 23 is provided with a detecting hole 231. The fixing seat 23 is a chuck structure and is used for standard limiting of the movable range of the first detecting member 21 and the second detecting member 22. The detection hole 231 is a central hole of the fixing seat 23, the first detection piece 21 and the second detection piece 22 penetrate from the detection hole 231 to form a columnar detection column, and a detection gap is formed between a circumferential detection surface of the detection column and a hole wall of the detection hole 231. The maximum gap of the detection hole 231 is the maximum relative movement amount of the first detection member 21 and the second detection member 22, when the inner diameter of the workpiece 60 is unqualified, the first detection member 21 and the second detection member 22 are abutted against the hole wall of the detection hole 231, so that the unqualified workpiece 60 is determined, and meanwhile, the excessive movement of the first translation part 31 and the second translation part 32 is avoided, and the use accuracy and reliability of the inner hole detector are maintained.

Other embodiments of the utility model will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This utility model is intended to cover any variations, uses, or adaptations of the utility model following, in general, the principles of the utility model and including such departures from the present disclosure as come within known or customary practice within the art to which the utility model pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the utility model being indicated by the following claims.

It is to be understood that the utility model is not limited to the precise arrangements and instrumentalities shown in the drawings, which have been described above, and that various modifications and changes may be effected without departing from the scope thereof. The scope of the utility model is limited only by the appended claims.

Claims

1. An inner bore detector, comprising:

a housing;

2. The inner hole detector according to claim 1, wherein the deformation riser is a plate-like thin-walled member, and the thickness of the deformation riser is less than or equal to 1mm.

3. The inner hole detector according to claim 1, wherein the end surfaces of the first translation portion and the second translation portion are spaced apart by a predetermined distance, and the relative movement amount of the first translation portion and the second translation portion is 0.1mm to 3mm.

4. The inner hole detector according to claim 1, wherein the first translation portion is provided with a positioning groove and a positioning hole at the bottom of the positioning groove, the first detecting element is embedded in the positioning groove, and the fastener passes through the positioning hole and is locked to the first detecting element.

5. The inner hole detector according to claim 4, wherein groove walls on two sides of the positioning groove are provided with inclined surfaces, the first detecting piece is in sliding fit with the inclined surfaces, and the length direction of the positioning groove is parallel to the parallel direction of the first translation portion.

6. The inner bore detector of claim 1, wherein the first translating portion is provided with a mounting hole, the pressure sensor is inserted from the mounting hole, and a pressure sensing surface of the pressure sensor is flush with or exceeds an end surface of the first translating portion.

7. The inner hole detector according to claim 1, wherein the air pressure output assembly comprises a nozzle member and a conduit connected to the nozzle member, the second translation portion is provided with an air outlet hole and a clearance hole penetrating through the second translation portion, the nozzle member is mounted to the air outlet hole, and the conduit penetrates out along the clearance hole.

8. The inner hole detector according to claim 1, wherein the detecting assembly comprises a fixing seat connected to the casing in a plugging manner, the fixing seat is provided with a detecting hole, the first detecting piece and the second detecting piece penetrate out of the detecting hole to form a columnar detecting column, and a detecting gap is formed between a circumferential detecting surface of the detecting column and a hole wall of the detecting hole.

9. The internal bore detector of claim 8, wherein the first probe comprises a connecting portion, a semi-cylinder protruding from the connecting portion, and a locking portion penetrating through the connecting portion, opposite sides of the connecting portion being inclined surfaces.

10. The bore detector of claim 9, wherein the first probe and the second probe are symmetrically disposed.