A compact elastic floating probe head

Abstract

The present application relates to a kind of compact elastic floating probe, including floating axle, floating axle one end outer movable sleeve is equipped with fixing part, floating axle other end outer movable sleeve is equipped with floating part;Fixed part, floating axle and floating part are consistent in axial direction, at the axial center, it is hollow and is passed through and is housed with displacement sensor, the end of floating part located in the outside of floating axle is equipped with probe assembly, and the end of probe assembly is opposite with the end of displacement sensor;Floating part and the circumferential outer sleeve of floating axle are connected, and nut baffle is equipped, and the accommodating space is formed by nut baffle and fixed part on the outside of floating axle;Accommodating space is housed with elastic component for floating part floating reset;When probe assembly is under external force, it can be floating by plane movement or circumferential swing, and it can guarantee reliable coaxial between fixed part when external force is cancelled, overall structure is compact, small in size, good in use stability, and assembly is simple, low in cost, good in practicality.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of precision measurement, in particular to a compact elastic floating probe. BACKGROUND

[0002] When measuring holes in an automated manner, especially when measuring diameters in the case of poor position of the holes, the probe needs to be installed on a mechanism that can float to ensure that the probe can smoothly enter the measured hole.

[0003] In the prior art, the probe for measuring the inner diameter is usually installed on a cross floating mechanism, that is, a cross sliding shaft and guide rail are used to realize floating within a certain range by cooperating with the action of a spring force.

[0004] The cross floating mechanism for the probe in the prior art has the following disadvantages:

[0005] 1. The structure is complex, especially high requirements for installation and debugging, and high cost;

[0006] 2. The overall size is large, and cannot be used in narrow scenes with limited space;

[0007] 3. The floating performance during measurement is poor. SUMMARY

[0008] In view of the above-mentioned disadvantages in the prior production technology, the present applicant provides a compact elastic floating probe with a reasonable structure, so as to allow floating in the translation and swing directions when subjected to force, and to reliably reset when the external force is removed, good stability, simple assembly, low cost, and good practicality.

[0009] The technical scheme adopted by the present application is as follows:

[0010] A compact elastic floating probe comprises a floating shaft, a fixed part movably sleeved on one end of the floating shaft, and a floating part movably sleeved on the other end of the floating shaft; the fixed part, the floating shaft and the floating part are coaxial, and a displacement sensor is hollowly penetrated and accommodated at the axial center; a probe assembly is installed at the end of the floating part outside the floating shaft, and the end of the probe assembly is opposite to the end of the displacement sensor; a nut sleeve is sleeved on the periphery of the joint between the floating part and the floating shaft, and a containing space is formed on the outer side of the floating shaft by the nut sleeve and the fixed part; an elastic assembly for floating and resetting of the floating part is contained in the containing space.

[0011] As a further improvement of the above technical scheme:

[0012] The elastic assembly comprises elastic part one and elastic part two, a retaining ring is sleeved on the inner wall of the fixed part outside the circumference of the floating shaft along the periphery, and the containing space is divided into two spaces for accommodating the elastic part one and the elastic part two along the axis by the retaining ring.

[0013] The movable ring is movably sleeved on the floating shaft between the end head of the floating member and the end head of the fixed member, a sliding sleeve is mounted between the movable ring and the inner end surface of the nut sleeve, and a gap exists between the inner wall surface of the sliding sleeve and the inner wall surface of the floating member; the end head of the floating member is outwardly extended in the circumferential direction to form a flange, an annular groove for inserting the flange is formed in the inner wall surface of the sliding sleeve, and the radial dimension of the annular groove is greater than the radial dimension of the flange; the second elastic member is mounted between the retaining ring and the movable ring, and the second elastic member tightly abuts the movable ring and the sliding sleeve towards the inner end surface of the nut sleeve.

[0014] The outer circumferential surfaces of the movable ring and the sliding sleeve are provided as outer convex arc surfaces, and the outer convex arc surfaces are in contact with the inner wall surface of the nut sleeve; the end portion circumferential wall surface of the floating shaft towards the floating member is provided as an outer convex arc structure one, and the outer convex arc structure one is in contact with the inner hole wall surface of the floating member.

[0015] The first elastic member is mounted between the retaining ring and the floating shaft, and the first elastic member tightly abuts the floating shaft towards the direction of the fixed member.

[0016] The retaining ring is a clamping spring, a gasket is press-fitted between the end portion of the first elastic member and the retaining ring, the outer circumferential surface of the gasket is in contact with the inner wall surface of the fixed member, and the inner hole diameter of the gasket is smaller than the inner hole diameter of the retaining ring.

[0017] The end portion circumferential wall surface of the floating shaft towards the fixed member is provided as an outer convex arc structure two, and a convex ring is outwardly extended in the circumferential direction on the outer wall surface of the floating shaft between the outer convex arc structure two and the retaining ring; the end portion of the first elastic member is in contact with one end surface of the convex ring, and the other end surface of the convex ring is in contact with the fixed member under the action of the first elastic member; the first elastic member is in the form of a cylinder, and the inner wall surface of the first elastic member is in contact with the outer wall surface of the floating shaft.

[0018] Long grooves are uniformly formed in the fixed member and the floating member along the circumferential direction and penetrate the fixed member and the floating member from the outside to the inside, the length direction of the long grooves is consistent with the axial direction, a limiting pin one is locked on the corresponding outer convex arc structure of the floating shaft through the long groove of the fixed member, and a limiting pin two is locked on the corresponding outer convex arc structure of the other end of the floating shaft through the long groove of the floating member.

[0019] An external thread is arranged on the end portion outer wall surface of the fixed member sleeved on the floating shaft, an internal thread is arranged on the corresponding end portion inner wall surface of the nut sleeve, the internal thread is matched with the external thread to be locked, a fastener is locked on the nut sleeve from the outside to the inside, and the inner end head of the fastener is in abutment with the external thread on the fixed member.

[0020] A connecting rod is fixedly inserted at the inner hole end portion of the floating member at the end head outside of the floating member, a measuring head assembly is fixedly inserted at the inner hole end portion of the connecting rod at the end head outside of the floating member, the circumferential wall surface of the displacement sensor is fixed to the inner wall surface of the connecting rod through a clamping sleeve, and the displacement sensor and the measuring head assembly are in abutment in the inner hole of the connecting rod.

[0021] The beneficial effects of the present application are as follows:

[0022] The present application has the advantages that: the structure is compact and reasonable, the operation is convenient, the floating performance is good when the measuring head assembly is subjected to external force, the applicability is good, the stability is good when the floating is reset to ensure the coaxiality between the fixed part and the fixed part, the displacement sensor is reliably accommodated at the axial center, the overall volume of the measuring head is small, the stability of the measurement is ensured, the assembly is simple, the cost is low, and the practicality is good;

[0023] The present application also includes the following advantages:

[0024] By the cooperation of the long groove and the limiting pin, the floating is achieved in the circumferential direction through the outer convex arc structure while the axial relative position is ensured, and the floating is limited; by the setting of the flange and the annular groove, the floating part can translate relative to the fixed part, and the translation floating is limited; so that the floating part can translate and swing relative to the fixed part, and the floating is limited within a certain range;

[0025] The elastic member one exerts force on the floating shaft to make it close to the fixed part, the elastic member two exerts force on the flange of the floating part through the movable ring and the sliding sleeve, under the joint action of the elastic member one and the elastic member two, the floating part is stably reset after floating relative to the fixed part, and the coaxiality is reliably ensured. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 It is the outer shape structure diagram of the present application.

[0027] Figure 2 It is the sectional view of the present application.

[0028] Figure 3 It is Figure 2 The local enlarged view of A in the middle.

[0029] Figure 4 It is Figure 2 The local enlarged view of B in the middle.

[0030] Wherein: 1, fixed part; 2, limiting pin one; 3, floating shaft; 4, elastic member one; 5, gasket; 6, retaining ring; 7, elastic member two; 8, nut retaining sleeve; 9, movable ring; 10, sliding sleeve; 11, limiting pin two; 12, floating part; 13, fastener; 14, connecting rod; 15, measuring head assembly; 16, displacement sensor;

[0031] 301, outer convex arc structure one; 302, outer convex arc structure two; 303, convex ring; 1001, outer convex arc surface; 1002, annular groove; 1201, long slot; 1202, flange. DETAILED DESCRIPTION

[0032] The specific embodiments of the present application are described below with reference to the accompanying drawings.

[0033] As shown in Figure 1 and Figure 2 , a compact elastic floating probe of the embodiment comprises a floating shaft 3, a fixed part 1 movably sleeved on one end of the floating shaft 3, and a floating part 12 movably sleeved on the other end of the floating shaft 3; the fixed part 1, the floating shaft 3 and the floating part 12 are coaxial, and a displacement sensor 16 is hollowly passed through and accommodated at the axial center; a probe assembly 15 is installed at the end of the floating part 12 outside the floating shaft 3, and the end of the probe assembly 15 is opposite to the end of the displacement sensor 16; a nut stop sleeve 8 is movably sleeved on the periphery of the joint between the floating part 12 and the floating shaft 3, and a containing space is formed on the outer side of the floating shaft 3 by the nut stop sleeve 8 and the fixed part 1; an elastic assembly for floating reset of the floating part 12 is contained in the containing space.

[0034] When the probe assembly 15 is subjected to external force, it can float by moving in the plane or swinging in the circumferential direction, and can reliably reset when the external force is removed to ensure coaxiality with the fixed part 1, so that the use stability is good; on the other hand, the displacement sensor 16 can be reliably accommodated at the axial center, which not only makes the whole probe small and compact, but also helps to ensure the stability of measurement.

[0035] Specifically, the elastic assembly comprises an elastic part one 4 and an elastic part two 7 which are sequentially sleeved along the axial direction of the floating shaft 3, and a stop ring 6 is sleeved along the circumferential direction on the inner wall surface of the fixed part 1 outside the circumference of the floating shaft 3, which divides the containing space into two spaces containing the elastic part one 4 and the elastic part two 7 respectively along the axial direction.

[0036] Further, as shown in Figure 2 and Figure 3 , a movable ring 9 is movably sleeved on the floating shaft 3 between the end of the floating part 12 and the end of the fixed part 1, a sliding sleeve 10 is installed between the movable ring 9 and the inner end surface of the nut stop sleeve 8, and there is a gap between the inner wall surface of the sliding sleeve 10 and the inner wall surface of the floating part 12; the end of the floating part 12 extends outwardly in the circumferential direction to form a flange 1202, the inner wall surface of the sliding sleeve 10 is provided with an annular groove 1002 for plug-in installation of the flange 1202, and the depth dimension of the annular groove 1002 in the radial direction is greater than the radial dimension of the flange 1202, so that the floating part 12 can relatively translate in the radial direction; the elastic part two 7 is installed between the stop ring 6 and the movable ring 9, and the elastic part two 7 tightly abuts the movable ring 9 and the sliding sleeve 10 towards the inner end surface of the nut stop sleeve 8.

[0037] In the embodiment, the inner diameter of the movable ring 9 is smaller than the inner diameter of the sliding sleeve 10; under the elastic force of the elastic member two 7, the sliding sleeve 10 is forced to make the cross sections of the movable ring 9 and the sliding sleeve 10 adhere to each other by the axial movement of the movable ring 9, and then the force is transmitted to the floating member 12 to make the floating member 12 reset under no force; the movable ring 9 is arranged to ensure the reliability of the reset, and the sliding sleeve 10 is arranged to limit the amount of floating, and the combination of the two ensures the floating performance of the floating member 12.

[0038] Further, the outer circumferential surface of the movable ring 9 and the outer circumferential surface of the sliding sleeve 10 are arranged as outer convex arc surfaces 1001, which are in contact with the inner wall surface of the nut sleeve 8, so as to be able to swing relatively while being in contact with each other, thereby assisting the smoothness of floating; the end circumferential wall surface of the floating shaft 3 towards the floating member 12 is arranged as an outer convex arc structure one 301, which is in contact with the inner hole wall surface of the floating member 12.

[0039] Further, the elastic member one 4 is installed between the stop ring 6 and the floating shaft 3, and the elastic member one 4 tightly adheres to the floating shaft 3 in the direction of the fixed member 1 to ensure the reset thereof.

[0040] As an optional form of the embodiment, the stop ring 6 is a snap spring, a gasket 5 is press-fitted between the end of the elastic member one 4 and the stop ring 6, the outer circumferential surface of the gasket 5 is in contact with the inner wall surface of the fixed member 1, and the inner hole diameter of the gasket 5 is smaller than the inner hole diameter of the stop ring 6; the gasket 5 is arranged to compensate for the deficiency of the oversized inner diameter of the standard snap spring.

[0041] The stop ring 6 in the embodiment can also be a machined part, which is fixedly installed with the inner wall surface of the fixed member 1, and the two end surfaces thereof are respectively used for the abutting installation of the elastic member one 4 and the elastic member two 7.

[0042] Further, as shown in the figure, Figure 4 the end circumferential wall surface of the floating shaft 3 towards the fixed member 1 is arranged as an outer convex arc structure two 302, and the outer wall surface of the floating shaft 3 between the outer convex arc structure two 302 and the stop ring 6 extends outward in the circumferential direction to form a convex ring 303; the end surface of one end of the convex ring 303 is tightly adhered to the end of the elastic member one 4, and the other end surface of the convex ring 303 is tightly adhered to the fixed member 1 by the elastic member one 4;

[0043] By arranging the convex ring 303, on the one hand, the elastic member one 4 is abutted and installed between the floating shaft 3 and the stop ring 6, and on the other hand, the floating shaft 3 is conveniently reset in contact with the fixed member 1.

[0044] The elastic member one 4 is in a cylindrical structure, the inner wall surface of the elastic member one 4 is tightly adhered to the outer wall surface of the floating shaft 3, and the elastic member one 4 is used to realize the swing reset, so as to make the axial swing reset.

[0045] The fixed part 1 and the floating part 12 are uniformly provided with long slots 1201 penetrating in and out along the circumference, and the length direction of the long slots 1201 is consistent with the axial direction; the long slots 1201 penetrating in and out from the outside to the inside of the fixed part 1 are locked with the limiting pin one 2 towards the corresponding outer convex arc structure on the floating shaft 3, and the long slots 1201 penetrating in and out from the outside to the inside of the floating part 12 are locked with the limiting pin two 11 towards the outer convex arc structure on the other end of the floating shaft 3.

[0046] Through the cooperation of the long slots 1201 and the limiting pins, the relative position in the axial direction is ensured, and the swing floating in the circumferential direction is realized through the outer convex arc structure, and the swing floating is limited; through the setting of the flanging 1202 and the annular slot 1002, the floating part 12 can translate and float relative to the fixed part 1, and the translation and floating is limited; thus, the translation and swing floating of the floating part 12 relative to the fixed part 1 is realized, and the floating is limited in a certain range.

[0047] The end outer wall surface of the fixed part 1 sleeved on the floating shaft 3 is provided with external threads, the end inner wall surface of the nut sleeve 8 is provided with internal threads, and the internal threads are matched and locked with the external threads; the nut sleeve 8 is locked with the fastener 13 penetrating in and out from the outside to the inside, and the inner end of the fastener 13 is abutted with the external threads on the fixed part 1.

[0048] On the one hand, the fixed part 1 and the nut sleeve 8 are matched to form a containing space for the installation of the floating reset assembly, and on the other hand, the size of the containing space can be adjusted in the axial direction through the axial rotation of the nut sleeve 8 relative to the fixed part 1, especially for limiting and adjusting the movement and deflection of the movable ring 9 and the sliding sleeve 10 in the axial direction, and the installation and adjustment are convenient.

[0049] When the nut sleeve 8 is threadedly locked with the fixed part 1, the fastener 13 abutting with the external threads is also installed in the radial direction, and the relative fixation between the nut sleeve 8 and the fixed part 1 is further ensured through the fastener 13.

[0050] The connecting rod 14 is fixedly inserted at the inner hole end of the floating part 12 at the end of the floating shaft 3, and the measuring head assembly 15 is fixedly inserted at the inner hole end of the connecting rod 14 at the end of the floating part 12; the displacement sensor 16 is fixed on the inner wall surface of the connecting rod 14 through the clamping sleeve, and the displacement sensor 16 and the measuring head assembly 15 are opposite and abutted in the inner hole of the connecting rod 14.

[0051] Through the installation of the connecting rod 14, the axial extension of the measuring head assembly 15 is realized, so that it can be applied to a narrow space; the connecting rod 14, the measuring head assembly 15 and the displacement sensor 16 can be installed as a whole assembly, then the displacement sensor 16 is inserted into the inner hole of the floating part 12, and the floating part 12 and the connecting rod 14 are locked and fastened through the radial screw, and the installation is completed.

[0052] As a preferred example of the embodiment, the elastic member one 4 and the elastic member two 7 can both be selected as a wave spring, which has a large rigidity and a large variable performance compared to a common spring, and is particularly suitable for scenes of weight reduction and installation space constraints, effectively helping to reduce the overall volume of the mechanism on the basis of ensuring floating reset.

[0053] The application has a compact structure, can reliably install and accommodate a displacement sensor 16 with a diameter of up to 8mm, and has good overall floating performance, good adaptability, good stability, simple assembly, and low cost.

[0054] The above description is an explanation of the application, not a limitation of the application, the scope of the application is defined in the claims, within the protection scope of the application, any form of modification can be made.

Claims

1. A compact, elastic floatation probe, characterized by: The utility model provides a kind of displacement sensor, including floating axle (3), floating axle (3) one end outer movable sleeve is equipped with fixed part (1), floating axle (3) other end outer movable sleeve is equipped with floating part (12);The fixed part (1), floating axle (3) and floating part (12) axial coincidence, at axial center place common hollow through and accommodate have displacement sensor (16), located floating axle (3) outside floating part (12) end installation measuring head assembly (15), measuring head assembly (15) end and displacement sensor (16) end opposite;The floating part (12) and floating axle (3) junction of place are equipped with nut baffle (8) in the circumferential outer sleeve, in floating axle (3) outside surface by nut baffle (8) and fixed part (1) form accommodating space;The accommodating space is accommodated with the elastic component for floating part (12) floating reset; The elastic component includes elastic piece one (4) and elastic piece two (7), is equipped with baffle ring (6) on the fixed part (1) inner wall surface along the circumference outside floating axle (3), baffle ring (6) will accommodate space be divided into two spaces along axial direction respectively accommodating elastic piece one (4) and elastic piece two (7); Movable sleeve is equipped with movable ring (9) on floating axle (3) between floating part (12) end and fixed part (1) end, sliding sleeve (10) is installed between movable ring (9) and nut baffle (8) inner end face, and there is gap between sliding sleeve (10) inner wall surface and floating part (12) inner wall surface; The end of the floating part (12) extends outwardly in the circumferential direction to form a flange (1202), and the inner wall surface of the sliding sleeve (10) is provided with an annular groove (1002) for inserting the flange (1202), and the radial depth of the annular groove (1002) is greater than the radial dimension of the flange (1202); The gap makes the distance between the flange (1202) and the annular wall surface of the annular groove (1002) satisfy that the radial depth of the annular groove (1002) is greater than the radial dimension of the flange (1202); through the setting of the flange (1202) and the annular groove (1002), the floating part (12) can translate relative to the fixed part (1), and the translation is limited; The elastic piece two (7) is installed between the baffle ring (6) and the movable ring (9), and the elastic piece two (7) tightly contacts the movable ring (9) and the sliding sleeve (10) towards the inner end surface of the nut baffle (8); The elastic piece one (4) is installed between the baffle ring (6) and the floating axle (3), and the elastic piece one (4) tightly contacts the floating axle (3) in the axial direction towards the fixed part (1), and force is transmitted to the floating part (12) to reset the floating part (12) when not under stress; The outer circumferential surface of the movable ring (9) and the sliding sleeve (10) is provided as an outer convex arc surface (1001), which contacts and fits with the inner wall surface of the nut baffle (8), and at the same time, the outer convex arc surface (1001) can swing relative to the inner wall of the nut baffle (8).

2. A compact compliant elastic floatation probe as claimed in claim 1, wherein: The outer convex arc structure one (301) is arranged on the end circumferential wall surface of the floating shaft (3) towards the floating member (12) and is in contact with the inner hole wall surface of the floating member (12).

3. A compact compliant elastic floatation probe as claimed in claim 1 wherein: The grommet (6) is a snap spring, and a gasket (5) is press-fitted between the end of the elastic member one (4) and the grommet (6), the outer circumferential surface of the gasket (5) is in contact with the inner wall surface of the fixing member (1), and the inner hole diameter of the gasket (5) is smaller than the inner hole diameter of the grommet (6).

4. A compact compliant compliant elastic floatation probe as claimed in claim 1 wherein: The outer convex arc structure two (302) is arranged on the end circumferential wall surface of the floating shaft (3) towards the fixing member (1), and the convex ring (303) is outwardly extended in the circumferential direction on the outer wall surface of the floating shaft (3) between the outer convex arc structure two (302) and the grommet (6); the end surface of one end of the convex ring (303) is in close contact with the end of the elastic member one (4), and the end surface of the other end of the convex ring (303) is in close contact with the fixing member (1) under the action of the elastic member one (4); the elastic member one (4) is in a cylindrical structure, and the inner wall surface of the elastic member one (4) is in close contact with the outer wall surface of the floating shaft (3).

5. A compact compliant compliant elastic floatation probe as claimed in claim 1 wherein: The fixing member (1) and the floating member (12) are uniformly provided with the long grooves (1201) penetrating in and out in the circumferential direction, and the length direction of the long grooves (1201) is consistent with the axial direction; the limit pin one (2) is locked on the corresponding outer convex arc structure of the floating shaft (3) through the long groove (1201) penetrating in and out in the fixing member (1) from the outside to the inside; and the limit pin two (11) is locked on the outer convex arc structure of the other end of the floating shaft (3) through the long groove (1201) penetrating in and out in the floating member (12) from the outside to the inside.

6. A compact compliant compliant elastic floatation probe as claimed in claim 1 wherein: The outer thread is arranged on the end outer wall surface of the fixing member (1) sleeved on the floating shaft (3), the inner thread is arranged on the corresponding end inner wall surface of the nut sleeve (8), the inner thread is matched and locked with the outer thread, and the fastener (13) is locked by penetrating in and out in the nut sleeve (8) from the outside to the inside; the inner end head of the fastener (13) is in abutment with the outer thread on the fixing member (1).

7. A compact compliant compliant elastic floatation probe as claimed in claim 1 wherein: The connecting rod (14) is fixedly inserted in the inner hole end of the floating member (12) located at the outer end of the floating shaft (3), the probe assembly (15) is fixedly inserted in the inner hole end of the connecting rod (14) located at the outer end of the floating member (12), the circumferential wall surface of the displacement sensor (16) is fixed to the inner wall surface of the connecting rod (14) through the clamping sleeve, and the displacement sensor (16) and the probe assembly (15) are in abutment in the inner hole of the connecting rod (14).

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