CN115235403A - Small-hole single-section multi-point measuring head - Google Patents
Small-hole single-section multi-point measuring head Download PDFInfo
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- CN115235403A CN115235403A CN202210711666.2A CN202210711666A CN115235403A CN 115235403 A CN115235403 A CN 115235403A CN 202210711666 A CN202210711666 A CN 202210711666A CN 115235403 A CN115235403 A CN 115235403A
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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
- G01B21/10—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 diameters
- G01B21/14—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 diameters internal diameters
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- A Measuring Device Byusing Mechanical Method (AREA)
Abstract
The invention relates to a small-hole single-section multipoint measuring head, which comprises a sensor fixing seat, wherein a plurality of air-thrust sensors are parallelly and parallelly arranged in the sensor fixing seat; an end cover is assembled at the end part of the sensor fixing seat at the output end of the air pushing sensor, measuring rods penetrate through the end cover along the axial direction of the air pushing sensor, the number of the measuring rods is consistent with that of the air pushing sensor, and the measuring rods are uniformly arranged along the circumferential direction; the single measuring rods are rotatably connected with the end covers, so that the plurality of measuring rods are in an outward-opening or inward-contraction state when rotating; the measuring rod positioned on the inner side of the end cover extends to form a contact part which is vertical to the axial direction of the air-pushing sensor, and the end head of the contact part is right opposite to the output end of the corresponding air-pushing sensor; the measuring rod is ingeniously arranged between the air pushing sensor and the end cover, so that the whole structure is compact, the whole volume of the measuring head is greatly reduced, the measuring head is particularly suitable for measuring the diameter and the position degree of a small hole in a narrow space, the cost is low, and the effect is good.
Description
Technical Field
The invention relates to the technical field of small hole measuring equipment, in particular to a small hole single-section multipoint measuring head.
Background
In the prior art, inner hole measuring tools mainly comprise an inner diameter dial indicator, an inner diameter micrometer, a pneumatic measuring instrument, an electronic plug gauge and the like, and the measuring tools can only measure the diameter of an inner hole generally and are not suitable for being used on an automatic measuring machine.
The measuring mechanism for the small hole in the existing automatic measuring equipment is generally complex in structure, is not suitable for measuring the hole with a small diameter, such as a 5mm inner diameter hole, and cannot reliably ensure the precision; on the basis of adopting miniature flexible rule displacement sensor of entry to guarantee measurement accuracy, there are more problems still, for example: the price is high, the brand is basically imported, the detection cost is high, and the shelf life is long; the flexible gauge displacement sensor has larger volume and cannot be applied in narrow space; can not be used under the severe working conditions of oil stains, cutting fluid and the like.
Disclosure of Invention
The applicant aims at the defects in the prior art and provides a small-hole single-section multipoint measuring head with a reasonable structure, so that the overall size of the measuring head is greatly reduced, the measuring head is particularly suitable for measuring the diameter and the position degree of a small hole in a narrow space, and the measuring head is low in cost and good in effect.
The technical scheme adopted by the invention is as follows:
a small-hole single-section multipoint measuring head comprises a sensor fixing seat, wherein a plurality of air-pushing sensors are parallelly arranged in the sensor fixing seat in parallel; the end part of the sensor fixing seat positioned at the output end of the pneumatic push sensor is provided with an end cover, measuring rods penetrate through the end cover along the axial direction of the pneumatic push sensor, the number of the measuring rods is consistent with that of the pneumatic push sensor, and the measuring rods are uniformly arranged along the circumferential direction; the single measuring rods are rotatably connected with the end covers, so that the plurality of measuring rods are in an outward-opening or inward-contraction state when rotating; the measuring rod positioned on the inner side of the end cover extends to form a contact part which is vertical to the axial direction of the air-pushing sensor, and the end head of the contact part is right opposite to the output end of the corresponding air-pushing sensor.
As a further improvement of the above technical solution:
and elastic plunger pins are locked inwards from the outer side surface of the end cover, and the inner end heads of the elastic plunger pins are arranged in one-to-one correspondence with the output ends of the air-pushing sensors and are respectively positioned on two opposite sides of the corresponding contact parts.
The through end cover is provided with a long groove for the measuring rods to move relatively when rotating, and the length direction of the long groove is arranged along the radial direction of the circumference formed by the plurality of measuring rods.
The measuring rods penetrate through the center of the end cover together, a measuring head frame which provides supporting and guiding for the measuring rods is further installed in the middle of the outer side face of the end cover, and a measuring head face of each measuring rod is attached to the wall of the small hole after protruding laterally relative to the measuring head frame.
The measuring rods are four in number, and the long grooves in the end covers corresponding to the four measuring rods form cross grooves.
The measuring head frame comprises four cylindrical structures vertically arranged on the outer side surface of the end cover, the four cylindrical structures are uniformly positioned at the corner of a notch at the joint of the centers of the cross grooves, the outer wall surfaces of the four cylindrical structures are positioned on the same cylindrical surface, and a measuring rod is correspondingly accommodated between every two adjacent cylindrical structures; the end parts of the four cylindrical structures are jointly provided with a guide cap, and the circumferential direction of the end part of the guide cap is provided with a conical surface structure.
A rotating shaft is rotatably arranged through the middle of the measuring rod, and two ends of the rotating shaft are fixed relative to the end cover; the axial direction of the rotating shaft is perpendicular to the direction in which the measuring rod penetrates out of the end cover and the length direction of the contact part.
The structure of a single measuring rod is as follows: the measuring device comprises a measuring part penetrating through an end cover, wherein the measuring part extends to form a contact part through a transition section, and the contact part and the measuring part are staggered in space; a mounting part extends laterally from the measuring part at the joint of the transition section, and a mounting hole is formed through the mounting part; the installation part and the measuring head surface contacted with the hole wall of the small hole are arranged on the same side surface of the measuring part.
The transition section is connected between the measuring part and the contact part end to end, and the length direction of the transition section is vertical to the length direction of the measuring part and the length direction of the contact part; the transition section is a connection structure with more than two sections, and comprises an inclined part connected with the measuring part and a connection part connected with the contact part.
The sensor fixing seat comprises a cylindrical body, cabins which are in one-to-one correspondence with the air-thrust sensors are axially arranged through the cylindrical body, and the cabins are uniformly arranged at intervals along the same circumferential direction; through grooves which penetrate through in and out and in the length direction are formed along the outer wall surface of the cylindrical body towards the inner wall surface of each cabin, and grooves which penetrate through in the length direction are formed along the outer wall surface of the cylindrical body towards the space between adjacent cabins, so that the outer wall surface of the cylindrical body between the through grooves and the grooves forms a petal-shaped structure corresponding to the cabins;
the outer wall surface of the sensor fixing seat is further sleeved with a hoop, and the air-pushing sensor in the cabin is fixed through the deformation force of the flap-shaped structure.
The invention has the following beneficial effects:
the gas-pushing sensor has the advantages that the structure is compact and reasonable, the operation is convenient, the variation of the diameter in the hole is transmitted to the gas-pushing sensor outside the hole through the ingenious arrangement of the measuring rod between the gas-pushing sensor and the end cover, the measurement of the aperture and the position degree of the inner hole is realized, the integral layout is compact, the integral volume of the measuring head is greatly reduced, the gas-pushing sensor is particularly suitable for measuring small holes with the inner diameter of 5mm in a narrow space, and the cost is low; the hole wall of the inner hole is subjected to multi-point measurement with the same section through synchronous arrangement of a plurality of measuring rods, so that the measuring effect is reliably ensured, the reliability and stability of measurement are ensured, and the practicability is good;
the invention also comprises the following advantages:
after the measuring rod extends into the small hole, the measuring rod swings under the pushing action of the air pushing sensor and is in contact fit with the hole wall, and the moving distance is fed back by the air pushing sensor to obtain a measured value; after the thrust of the air-pushing sensor to the measuring rod is cancelled, the measuring rod swings back and resets under the elastic action of the elastic plunger pin; on the other hand, a certain pretightening force is applied to the measuring rod through the installation and adjustment of the elastic plunger pin, so that the measuring rod is reliably close to the air-thrust sensor, and the air-thrust sensor is assisted in lifting and ensures the reliability of measurement;
the arrangement of the measuring head frame provides support and protection for the measuring rod with large length-diameter ratio by combining the guide cap on one hand, and provides stable guide effect for swinging and swinging back of the measuring rod in the measuring process on the other hand, so that the service life of the measuring rod is ensured by assistance, the smoothness and stability of swinging of the measuring rod are improved, and the measuring reliability is improved; meanwhile, the arrangement of the guide cap also provides a guide effect when the measuring rod extends into the hole, so that the measuring rod can smoothly enter the hole, and effective measurement is reliably guaranteed;
the flap type structure is arranged on the sensor fixing seat, after the air-propelled sensor is installed in the cabin, the flap type structure is deformed through the sleeving locking of the hoops, the air-propelled sensor is fixed, therefore, the reliable fixed installation of the air-propelled sensor is realized on the basis that the size of the sensor fixing seat, especially the section size, is effectively reduced, the use of the measuring head in a narrow space is effectively assisted, and the practicability is good.
Drawings
Fig. 1 is a view showing the configuration of the present invention.
FIG. 2 is a schematic view of the arrangement of measuring rods at the end cover of the present invention.
Fig. 3 is a partially enlarged view of a portion a in fig. 2.
Fig. 4 is a schematic structural view of the measuring bar of the present invention.
Fig. 5 is a schematic structural diagram of a sensor holder according to the present invention.
Wherein: 1. a hoop; 2. a sensor holder; 3. an end cap; 4. an elastic plunger pin; 5. a measuring rod; 6. a measuring head frame; 7. a guide cap; 8. a pneumatic push sensor; 9. a rotating shaft;
11. a flange structure; 12. carrying out top thread;
21. a cylindrical body; 22. a through hole; 23. a groove; 24. a cabin; 25. a through groove;
31. a cross groove;
51. a measuring section; 52. an installation part; 53. mounting holes; 54. an inclined portion; 55. a joining portion; 56. a contact portion; 57. measuring the head surface;
81. a cable.
Detailed Description
The following describes embodiments of the present invention with reference to the drawings.
As shown in fig. 1 and fig. 2, the small-hole single-section multipoint measuring head of the present embodiment includes a sensor fixing base 2, and a plurality of air-thrust sensors 8 are installed in parallel inside the sensor fixing base 2; an end cover 3 is assembled at the end part of a sensor fixing seat 2 positioned at the output end of the air pushing sensor 8, measuring rods 5 penetrate through the end cover 3 along the axial direction of the air pushing sensor 8, the number of the measuring rods 5 is consistent with that of the air pushing sensor 8, and the measuring rods 5 are uniformly arranged along the circumferential direction; the single measuring rods 5 are rotatably connected with the end cover 3, so that the plurality of measuring rods 5 form an outward expansion state or an inward contraction state when rotating; the measuring rod 5 positioned on the inner side of the end cover 3 extends with a contact part 56 which is perpendicular to the axial direction of the air-thrust sensor 8, and the end of the contact part 56 is opposite to the output end of the corresponding air-thrust sensor 8.
The measuring rod 5 is ingeniously arranged between the air-propelled sensor 8 and the end cover 3, so that the variation of the diameter in the hole is transmitted to the air-propelled sensor 8 outside the hole, the measurement of the hole diameter and the position degree of the inner hole is realized, the overall layout is compact, and the overall volume of the measuring head is greatly reduced; through the synchronous layout of a plurality of measuring bars 5, the multipoint measurement of the same section is formed on the inner hole wall, and the measurement effect is reliably ensured.
In the embodiment, the contact part 56 on the measuring rod 5 is arranged to reliably convert the movement of the measuring part of the measuring rod 5 in the mutually perpendicular direction and the displacement at the output end of the pneumatic sensor 8, so that the measurement of the inner diameter of the small hole can be realized through reasonable layout, the device is particularly suitable for measuring small holes with the inner diameter of 5mm in a narrow space, and the cost is low.
Elastic plunger pins 4 are locked inwards from the outer side surface of the end cover 3, the inner end heads of the elastic plunger pins 4 are arranged in one-to-one correspondence with the output ends of the air-pushing sensors 8 and are respectively positioned on two opposite sides of the corresponding contact parts 56, as shown in fig. 3.
In the embodiment, after the measuring rod 5 extends into the small hole, the measuring rod 5 swings under the pushing action of the air pushing sensor 8 and is in contact fit with the hole wall, and the moving distance is fed back by the air pushing sensor 8 to obtain a measured value; after the thrust of the air-pushing sensor 8 to the measuring rod 5 is cancelled, the measuring rod 5 swings back and resets under the elastic action of the elastic plunger pin 4; on the other hand, the elastic plunger pin 4 is rotatably arranged in the end cover 3 through threaded connection, and a certain thrust is applied to the measuring rod 5 through the installation and axial adjustment of the elastic plunger pin 4 to form a pretightening force, so that the measuring rod 5 is reliably attached to the air thrust sensor 8, and the pretightening force is used for promoting and ensuring the measuring reliability.
The end cover 3 is penetrated to be provided with a long groove for the measuring rod 5 to move relatively when rotating, the length direction of the long groove is arranged along the radial direction of the circumference formed by the plurality of measuring rods 5, and the assistance is used for guaranteeing and improving the smoothness and the reliability of the swinging of the measuring rods 5.
The measuring rods 5 commonly penetrate through the center of the end cover 3, so that the whole arrangement is compact, and the size of the measuring rods 5 is ensured as much as possible under the condition that the measuring rods can be used for measuring small-hole inner holes, so that the strength and the rigidity of the measuring rods 5 are ensured; the middle part of the outer side surface of the end cover 3 is also provided with a measuring head frame 6 for providing supporting and guiding for the measuring rod 5, and a measuring head surface 57 of the measuring rod 5 is attached to the wall of the small hole after protruding laterally relative to the measuring head frame 6.
The number of the measuring rods 5 is four, so that a single-section four-point measuring head is formed, the four measuring rods 5 are uniformly arranged in the circumferential direction, and the long grooves on the end cover 3 corresponding to the four measuring rods 5 form a cross groove 31.
The measuring head frame 6 comprises four cylindrical structures vertically arranged on the outer side surface of the end cover 3, the four cylindrical structures are uniformly positioned at the corner of a notch at the joint of the centers of the cross grooves 31, the outer wall surfaces of the four cylindrical structures are positioned on the same cylindrical surface, and a measuring rod 5 is correspondingly accommodated between every two adjacent cylindrical structures; the end parts of the four cylindrical structures are jointly provided with a guide cap 7, and the circumferential direction of the end part of the guide cap 7 is a conical surface structure.
Due to the arrangement of the measuring head frame 6, on one hand, the measuring rod 5 with a large length-diameter ratio is supported and protected by combining the guide cap 7, on the other hand, a stable guide effect is provided for the swinging and swinging back of the measuring rod 5 in the measuring process, the service life of the measuring rod 5 is ensured by assistance, the swinging smoothness and stability of the measuring rod 5 are improved, and the measuring reliability is improved; meanwhile, the arrangement of the guide cap 7, particularly the conical surface structure on the guide cap, provides a guide effect when the measuring rod 5 extends into the hole, so that the measuring rod can smoothly enter the hole, and effective measurement is reliably guaranteed.
In this embodiment, the guide cap 7 at the end may be mounted in an adhesive manner on the basis of pin positioning by using the cylindrical structure, or may be fixedly mounted in another manner.
In this embodiment, on the basis of ensuring the structural strength of the head measuring frame 6, the radial diameter of the head measuring frame can be as small as within 5mm, so that the head measuring frame can be effectively suitable for measuring small holes with inner diameters as small as 5mm by combining the swinging and the use of the inner measuring rod 5.
A rotating shaft 9 is rotatably arranged in the middle of the measuring rod 5, and two ends of the rotating shaft 9 are fixed relative to the end cover 3; the axial direction of the rotating shaft 9 is perpendicular to the direction in which the measuring rod 5 penetrates out of the end cover 3 and the length direction of the contact part 56.
In the single-section four-point measuring head of the embodiment, the rotating shafts 9 corresponding to the four measuring rods 5 are positioned on four edges of the same square, and the single rotating shaft 9 is fixedly mounted with the end cover 3 through the fastener, so that the overall structure layout is compact, the small size of small hole measurement is obtained, and the measurement accuracy is ensured.
As shown in fig. 4, the structure of the single measuring rod 5 is: the measuring device comprises a measuring part 51 penetrating through the end cover 3, wherein a contact part 56 extends from the measuring part 51 through a transition section, and the contact part 56 and the measuring part 51 are staggered in space; a mounting part 52 extends laterally from the measuring part 51 connected with the transition section, and a mounting hole 53 penetrates through the mounting part 52; the mounting part 52 and the measuring head surface 57 contacted with the pore wall of the small pore are arranged on the same side surface of the measuring part 51, so that the measuring rods 5 can be reliably gathered and arranged on the other side surface opposite to the side surface, the gathered side surface is arranged to be an inclined surface along the length direction, and the arrangement mode that the plurality of measuring rods 5 are gathered and abutted to each other is optimized and ensured by further assistance, so that the measuring rod is reliably suitable for small pore measurement.
The transition section is connected between the measuring part 51 and the contact part 56 end to end, and the length direction of the transition section is mutually vertical to the length direction of the measuring part 51 and the length direction of the contact part 56; the transition section is a connection structure with more than two sections, and comprises an inclined part 54 connected with the measuring part 51 and a connection part 55 connected with the contact part 56.
In this embodiment, the two parts of the measuring part 51 and the contact part 56 on the measuring rod 5 are connected by the arrangement of the transition section, the measuring part 51 where the plurality of measuring rods 5 are gathered together is diverged to form the contact part 56 which can be used in one-to-one correspondence with the air-thrust sensors 8, the requirements of gathering and small size of the measuring part 51 are met, and the installation and arrangement requirements of the air-thrust sensors 8 at the contact part 56 are met; in addition, in actual installation and use, mutual avoidance in layout among the measuring rods 5 is realized, and the compactness of the layout is ensured while mutual noninterference among the measuring rods 5 is ensured.
In this embodiment, consider the assurance of 5 intensity of measuring staff, it can use high-speed steel material to carry out surface coating according to the demand and handle, with promoting its surface strength and wearability, guarantee result of use and stability, guarantee life.
As shown in fig. 5, the sensor fixing seat 2 includes a cylindrical body 21, the axial direction penetrates through the cylindrical body 21 and is provided with cabins 24 corresponding to the air thrust sensors 8 one by one, and the cabins 24 are uniformly arranged at intervals along the same circumferential direction; through grooves 25 which are penetrated through in and out and in the length direction are formed along the outer wall surface of the cylindrical body 21 towards the inner wall surface of each cabin 24, and grooves 23 which are penetrated through in the length direction are formed along the outer wall surface of the cylindrical body 21 towards the space between adjacent cabins 24, so that the outer wall surface of the cylindrical body 21 between the through grooves 25 and the grooves 23 forms a petal-shaped structure corresponding to the cabins 24;
the outer wall surface of the sensor fixing seat 2 is also sleeved with a hoop 1, and an air-pushing sensor 8 in the cabin 24 is fixed through the deformation force of the flap-shaped structure.
Set up lamella type structure on sensor fixing base 2, after air pushes away sensor 8 and packs into cabin 24, the suit locking through hoop 1 makes lamella type structure deformation, realizes fixing air pushes away sensor 8 to effectively reducing sensor fixing base 2 volumes, especially on cross-sectional dimension's basis, realized air pushes away sensor 8's reliable fixed mounting, effective helping hand is in the use of gauge head in narrow and small space, and the practicality is good.
In this embodiment, the middle of the end surface of the sensor fixing seat 2 at the position where the end cover 3 is installed may be recessed to provide a space for the arrangement of the transition section and the contact part 56 of the measuring rod 5; after the air-propelled sensor 8 is axially assembled in the cabin 24, the cable 81 of the air-propelled sensor is led out from the end part of the sensor fixing seat 2 far away from the end cover 3; after the hoop 1 is sleeved on the outer wall surface of the sensor fixing seat 2, the jackscrew 12 can be locked towards the petal-shaped structure from outside to inside along the radial direction by penetrating through the wall surface of the hoop 1, and the air-pushed sensor 8 is tightly installed by the hoop 1 through screwing in the jackscrew 12.
In this embodiment, the sensor fixing seat 2 is close to the wall surface of the end cover 3 and is further provided with a through hole 22, the through hole 22 is communicated with the cabin 24 and corresponds to the cabin 24 one by one, and impurities such as cutting fluid entering the cabin 24 in the working process are timely discharged through the through hole 22, so that the reliable and stable use of the pneumatic push sensor 8, the measuring rod 5 and the like is ensured, and the measuring head is suitable for relatively severe working conditions.
In this embodiment, a flange structure 11 extends from the end of the hoop 1 away from the end cover 3, and the hoop 1 is installed with an external object through the flange structure 11, so as to implement the installation of the whole measuring head.
The use mode of the invention is as follows:
under the action of the pretightening force of the elastic plunger pin 4, the measuring part 51 of the measuring rod 5 retracts inwards in the radial direction relative to the measuring head frame 6;
under the action of external power, the multi-point measuring head integrally moves, so that the guide cap 7 gradually approaches to and extends into the small hole to be measured along the axial direction, and the measuring part 51 of the measuring rod 5 extends into the small hole along with the measuring head frame 6;
the air-thrust sensor 8 works to axially apply force to the contact part 56 of the measuring rod 5, so that the measuring rod 5 swings around the rotating shaft 9 as a circle center, and the measuring part 51 swings outwards in the radial direction relative to the measuring head frame 6, namely, the measuring parts 51 of the measuring rods 5 are outwards expanded to be close to and contact with the wall of the small hole; in this process, elastic plunger pin 4 is elastically contracted by the urging force of contact portion 56 of measuring rod 5;
until the measuring part 51 contacts with the hole wall, the measuring part 51 reacts on the air pushing sensor 8 through the measuring rod 5, so that the air pushing sensor 8 stops working under resistance, the size of the outward expansion of the measuring part 51 of the measuring rod 5 is obtained according to the working size of the air pushing sensor 8, and further the aperture of the small hole is obtained; integrating the dimension of the extension of the measuring part 51 of the four measuring rods 5 to obtain the dimension of the position degree of the small hole;
finally, when the pneumatic push sensor 8 works reversely, the measuring rod 5 swings reversely under the elastic action of the elastic plunger pin 4 after being pushed by the contact to the measuring rod 5, so that the measuring rod 5 retracts into the measuring head frame 6 radially.
In the invention, the measuring rod 5 is ingenious, compact and reasonable in layout, the overall volume of the measuring head is greatly reduced, and the measuring head is particularly suitable for measuring small holes with the inner diameter of 5mm in a narrow space; the measuring effect is reliably guaranteed through the structural form of multipoint measurement, the reliability and the stability of measurement are guaranteed, the practicability is good, and the cost is low.
The above description is intended to be illustrative and not restrictive, and the scope of the invention is defined by the appended claims, which may be modified in any manner within the scope of the invention.
Claims (10)
1. The utility model provides a small hole single cross section multiple spot gauge head which characterized in that: the sensor comprises a sensor fixing seat (2), wherein a plurality of air-thrust sensors (8) are arranged in parallel in the sensor fixing seat (2); the end part of the sensor fixing seat (2) positioned at the output end of the pneumatic push sensor (8) is provided with an end cover (3), measuring rods (5) penetrate through the end cover (3) along the axial direction of the pneumatic push sensor (8), the number of the measuring rods (5) is consistent with that of the pneumatic push sensor (8), and the measuring rods (5) are uniformly arranged along the circumferential direction; the single measuring rods (5) are rotatably connected with the end cover (3), so that the plurality of measuring rods (5) form an outward-opening or inward-contraction state when rotating; the measuring rod (5) positioned on the inner side of the end cover (3) extends to form a contact part (56) which is vertical to the axial direction of the air-thrust sensor (8), and the end of the contact part (56) is right opposite to the output end of the corresponding air-thrust sensor (8).
2. A small-bore single-section multi-point probe according to claim 1, wherein: the elastic plunger pins (4) are locked inwards from the outer side surfaces of the end covers (3), and the inner ends of the elastic plunger pins (4) are arranged in one-to-one correspondence with the output ends of the air-pushing sensors (8) and are respectively located on two opposite sides of the corresponding contact parts (56).
3. A small-bore single-section multi-point probe according to claim 1, wherein: the through end cover (3) is provided with a long groove for relative movement of the measuring rods (5) during rotation, and the length direction of the long groove is arranged along the radial direction of the circumference formed by the plurality of measuring rods (5).
4. A small-bore single-section multi-point probe according to claim 3, wherein: a plurality of measuring poles (5) run through from the center of end cover (3) jointly, end cover (3) lateral surface middle part still is installed and supports measuring head frame (6) of direction for measuring pole (5) provides, and head face (57) are laminated with the aperture pore wall after for measuring head frame (6) side direction protrusion in measuring pole (5).
5. The orifice single-section multi-point probe of claim 4, wherein: the number of the measuring rods (5) is four, and the long grooves on the end cover (3) corresponding to the four measuring rods (5) form cross grooves (31).
6. The orifice single section multi-point probe of claim 4, wherein: the measuring head frame (6) comprises four cylindrical structures vertically arranged on the outer side surface of the end cover (3), the four cylindrical structures are uniformly positioned at the corner of a notch at the center connection part of the cross groove (31), the outer wall surfaces of the four cylindrical structures are positioned on the same cylindrical surface, and a measuring rod (5) is correspondingly accommodated between every two adjacent cylindrical structures; the end parts of the four cylindrical structures are jointly provided with a guide cap (7), and the end part of the guide cap (7) is arranged to be a conical surface structure in the circumferential direction.
7. A small-bore single-section multi-point probe according to claim 1, wherein: a rotating shaft (9) is rotatably arranged through the middle part of the measuring rod (5), and two ends of the rotating shaft (9) are fixed relative to the end cover (3); the axial direction of the rotating shaft (9) is vertical to the direction that the measuring rod (5) penetrates out of the end cover (3) and the length direction of the contact part (56).
8. A small-bore single-section multi-point probe according to claim 1, wherein: the structure of a single measuring rod (5) is as follows: the device comprises a measuring part (51) penetrating through an end cover (3), wherein the measuring part (51) extends to form a contact part (56) through a transition section, and the contact part (56) and the measuring part (51) are staggered in space; a mounting part (52) extends laterally from the measuring part (51) connected with the transition section, and a mounting hole (53) penetrates through the mounting part (52); the mounting part (52) and a measuring head surface (57) contacted with the hole wall of the small hole are arranged on the same side surface of the measuring part (51).
9. The orifice single section multi-point probe of claim 8, wherein: the transition section is connected between the measuring part (51) and the contact part (56) end to end, and the length direction of the transition section is mutually vertical to the length direction of the measuring part (51) and the length direction of the contact part (56); the transition section is a connection structure with more than two sections, and comprises an inclined part (54) connected with the measuring part (51) and a connection part (55) connected with the contact part (56).
10. A small-bore single-section multi-point probe according to claim 1, wherein: the sensor fixing seat (2) comprises a cylindrical body (21), cabins (24) which are in one-to-one correspondence with the air thrust sensors (8) are axially arranged through the cylindrical body (21), and the cabins (24) are uniformly arranged at intervals along the same circumferential direction; through grooves (25) which are penetrated through in and out and in the length direction are formed in the outer wall surface of the cylindrical body (21) towards the inner wall surface of each cabin (24), and grooves (23) which are penetrated through in the length direction are formed in the outer wall surface of the cylindrical body (21) towards the space between adjacent cabins (24), so that the outer wall surface of the cylindrical body (21) between the through grooves (25) and the grooves (23) forms a petal-shaped structure corresponding to the cabins (24);
the sensor fixing seat (2) is also sleeved with a hoop (1) on the outer wall surface, and the air-pushing sensor (8) in the cabin (24) is fixed through the deformation force of the flap-shaped structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210711666.2A CN115235403A (en) | 2022-06-22 | 2022-06-22 | Small-hole single-section multi-point measuring head |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210711666.2A CN115235403A (en) | 2022-06-22 | 2022-06-22 | Small-hole single-section multi-point measuring head |
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| CN115235403A true CN115235403A (en) | 2022-10-25 |
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| CN202210711666.2A Pending CN115235403A (en) | 2022-06-22 | 2022-06-22 | Small-hole single-section multi-point measuring head |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117268317A (en) * | 2023-11-22 | 2023-12-22 | 成都大学 | Surface roughness measuring jig |
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2022
- 2022-06-22 CN CN202210711666.2A patent/CN115235403A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117268317A (en) * | 2023-11-22 | 2023-12-22 | 成都大学 | Surface roughness measuring jig |
| CN117268317B (en) * | 2023-11-22 | 2024-02-02 | 成都大学 | Surface roughness measuring jig |
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