Self-adaptive aperture detection device

Abstract

The utility model discloses a self-adaptive aperture detection device, which comprises a rod outer sleeve, a detection rod elastically connected in the rod outer sleeve along the axial direction, a main body structure fixedly connected outside the rod outer sleeve, and a sensor arranged on the rod outer sleeve and used for detecting the moving stroke of the detection rod, a gap is formed between the detection rod and the rod outer sleeve; a plurality of plunger through holes are formed in the peripheral wall of the lower end of the rod outer sleeve in the radial direction, elastic pieces are arranged in the plunger through holes, and the ends, close to the detection rod, of the elastic pieces make contact with the outer wall of the detection rod. According to the structure, a gap exists between the detection rod and the rod outer sleeve in the radial direction, the detection success rate can be improved through flexible self-adaptive adjustment, and the precision and applicability of aperture detection are improved.

Description

Technical Field

[0001] The utility model relates to the field of aperture detection, in particular to an adaptive aperture detection device. Background Art

[0002] In CNC machining, the machining accuracy of holes is required to be high, usually reaching 0.1mm to 0.001mm. However, during the machining process, the stability of the CNC machine tool cannot be guaranteed because the aluminum chips cannot be discharged in time, which makes the machining size of the hole too large or too small. In order to prevent defective products from entering the market, corresponding aperture detection devices are usually used. The current aperture detection device has a relatively fixed detection rod and other mechanical parts in the radial direction, and cannot be adjusted through flexible adaptive adjustment. Therefore, the failure rate is high in actual use, and it is also impossible to achieve high precision and high stability of aperture detection. Utility Model Content

[0003] In order to solve the above technical problems, the utility model provides an adaptive aperture detection device, wherein a gap is provided between the detection rod and the outer sleeve of the rod, and the detection rod is also provided with a plunger spring along the circumferential direction, and the head of the plunger spring is in contact with the detection rod. When the detection rod is subjected to radial force, the detection rod can be adaptively adjusted through the plunger spring.

[0004] The technical solution of the utility model is:

[0005] It includes a rod outer sleeve, a detection rod elastically connected to the rod outer sleeve along the axial direction, a main structure fixedly connected to the outside of the rod outer sleeve, and a sensor arranged on the rod outer sleeve for detecting the movement stroke of the detection rod; a gap is arranged between the detection rod and the rod outer sleeve; a plurality of plunger through holes are radially arranged on the outer peripheral wall of the lower end of the rod outer sleeve, and elastic parts are arranged in the plurality of plunger through holes, the elastic parts have elastic potential energy for hindering the radial movement of the detection rod, and one end of the elastic part close to the detection rod is in contact with its outer wall.

[0006] Its further technical solution is:

[0007] The lower end of the rod outer sleeve is provided with an annular supporting boss extending in the radial direction, and the detection rod is provided with a contact cam matching the supporting boss, and the lower end surface of the contact cam contacts the supporting boss.

[0008] Its further technical solution is:

[0009] The rod outer sleeve is a straight-through structure, and a sleeve sealing plate is provided on the upper end surface of the rod outer sleeve. The sleeve sealing plate has a sealing plate through hole coaxial with the rod outer sleeve for the detection rod to pass through, and a gap is provided between the detection rod and the sealing plate through hole.

[0010] Its further technical solution is:

[0011] The detection rod outer sleeve is provided with a buffer spring, and the two ends of the buffer spring are respectively in contact with the upper end surface of the contact cam and the lower end surface of the sleeve sealing plate.

[0012] Its further technical solution is:

[0013] The elastic member is a plunger spring, a limiting block is fixedly provided at a corresponding position on the rod outer sleeve, and one end of the plunger spring away from the detection rod is located in the cylindrical blind hole of the limiting block.

[0014] Its further technical solution is:

[0015] An end of the plunger through hole close to the detection rod is provided with a mounting step. When the housing step of the plunger spring abuts against the mounting step, the head of the plunger spring contacts the detection rod.

[0016] Its further technical solution is:

[0017] The main structure comprises a Havers clamp connecting piece, and the Havers clamp connecting piece is fixedly connected to the rod outer sleeve bolt through a second clamp.

[0018] Its further technical solution is:

[0019] The outer peripheral wall of the upper end of the rod outer sleeve is recessed in the radial direction, and the recess cooperates with the sleeve sealing plate to form an annular groove, and the second clamp is located in the annular groove.

[0020] Its further technical solution is:

[0021] The lower end of the detection rod includes an upper straight rod portion and a lower straight rod portion, the upper straight rod portion and the lower straight rod portion are connected through a tapered transition arc surface, and the tapered portion is an inverted cone structure; the upper straight rod portion and the lower straight rod portion are both cylindrical rods, and the cross-sectional radius of the upper straight rod portion is greater than the cross-sectional radius of the lower straight rod portion.

[0022] Its further technical solution is:

[0023] The upper end of the detection rod is provided with a detection ring matched with the sensor, and the detection ring is arranged above the outer sleeve of the rod.

[0024] The beneficial technical effects of the utility model are as follows: a gap is set between the detection rod and the rod outer sleeve, that is, a gap is set between the detection rod and the sealing plate through hole, and between the detection rod and the supporting boss; when the detection rod is subjected to an external radial force, the plunger spring can be automatically adjusted, so that the detection rod can be flexibly moved to flexibly adjust its own posture and direction, so as to match the detection rod with the aperture of the product to be tested, so as to improve the success rate of detection; the detection rod is provided with an upper straight rod portion and a lower straight rod portion, and the upper straight rod portion and the lower straight rod portion are connected by a tapered portion transition arc surface, so that the detection rod can flexibly adapt to the detection requirements of different apertures, thereby improving the accuracy and applicability of detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0026] Figure 2 This is a schematic diagram of the structure of the Haversian clamp connector of the utility model;

[0027] Figure 3 This is a schematic diagram of the structure of the outer sleeve of the rod of the utility model;

[0028] Figure 4 This utility model Figure 3 Schematic diagram of local structure;

[0029] Figure 5 It is a schematic cross-sectional view of part of the structure of the utility model;

[0030] 1. Detection rod; 11. Resistance cam; 12. Connecting part; 13. Upper straight rod part; 14. Lower straight rod part; 15. Conical part; 2. Main structure; 21. Fixed rod; 22. Havers clamp connector; 221. First clamp; 222. Second clamp; 23. Fixed base; 3. Sensor; 4. Rod outer sleeve; 41. Support boss; 42. Annular groove; 43. Plunger through hole; 5. Sleeve sealing plate; 51. Sealing plate through hole; 6. Plunger spring; 7. Limiting block; 8. Buffer spring; 9. Sensor bracket; 10. Detection ring. DETAILED DESCRIPTION

[0031] In order to more clearly understand the technical means of the utility model and implement it according to the contents of the specification, the specific implementation methods of the utility model are further described in detail below in conjunction with the drawings and embodiments. The following embodiments are used to illustrate the utility model but are not used to limit the scope of the utility model.

[0032] As shown in the figure, the adaptive aperture detection device described in the utility model includes a detection rod 1, a main structure 2 and a sensor 3 arranged on the upper end of the detection rod 1, and the main structure 2 is respectively connected to and supports the detection rod 1 and the sensor 3.

[0033] Specifically, the detection rod 1 is provided with a rod outer sleeve 4, and the main structure 2 includes a fixed rod 21, one end of the fixed rod 21 is fixedly connected to the rod outer sleeve 4 through a Havers clamp connector 22, and the other end of the fixed rod 21 is fixedly connected to a fixed base 23, and the fixed base 23 cooperates with an external servo mechanism.

[0034] Furthermore, the Haver clamp connector 22 is bolted and fixedly connected to the fixing rod 21 via a first clamp 221 , and the Haver clamp connector 22 is bolted and fixedly connected to the rod outer sleeve 4 via a second clamp 222 .

[0035] Furthermore, the rod outer sleeve 4 is a straight-through structure, and the lower end of the rod outer sleeve 4 is provided with an annular supporting boss 41 extending in the radial direction, and the lower end of the detection rod 1 passes through the supporting boss 41 and extends downward to exceed the supporting boss 41; the detection rod 1 is provided with a resistance cam 11 that cooperates with the supporting boss 41, and the lower end surface of the resistance cam 11 is in resistance to the supporting boss 41 to prevent the detection rod 1 from falling from the rod outer sleeve 4.

[0036] The upper end surface of the rod outer sleeve 4 is provided with a sleeve sealing plate 5, and the sleeve sealing plate 5 is fixedly connected to the upper end surface of the rod outer sleeve 4 by screws. The sleeve sealing plate 5 has a sealing plate through hole 51 coaxial with the rod outer sleeve 4 for the detection rod 1 to pass through.

[0037] The outer peripheral wall of the upper end of the rod outer sleeve 4 is radially recessed, and the recess cooperates with the sleeve sealing plate 5 to form an annular groove 42. The second clamp 222 of the Haversian clamp connector 22 is located in the annular groove 42 to better fix the rod outer sleeve 4.

[0038] The outer peripheral wall of the lower end of the rod outer sleeve 4 is radially provided with a plurality of plunger through holes 43, and elastic members are arranged in the plurality of plunger through holes 43, and the end of the elastic member close to the detection rod 1 is in contact with the outer wall thereof. Specifically, the elastic member is a plunger spring 6, and the head of the plunger spring 6 is in contact with the detection rod 1. Further, an installation step is arranged at the end of the plunger through hole 43 close to the detection rod 1. During installation, when the shell step of the plunger spring 6 abuts against the installation step, the head of the plunger spring 6 is in contact with the detection rod 1, and the installation of the plunger spring 6 is completed; the installation step ensures that the plunger spring 6 can be accurately and quickly installed in place. Further, a limiting block 7 is fixedly arranged on the rod outer sleeve 4 at a position corresponding to the plunger spring 6, and the end of the plunger spring 6 away from the detection rod 1 is located in the cylindrical blind hole of the limiting block 7. .

[0039] The detection rod 1 is also sleeved with a buffer spring 8, and the two ends of the buffer spring 8 are respectively in contact with the upper end surface of the contact cam 11 and the lower end surface of the sleeve sealing plate 5. Furthermore, the lower end surface of the sleeve sealing plate 5 is provided with a spring groove for accommodating the buffer spring 8. When the detection rod 1 is subjected to an axial force, the buffer spring 8 generates elastic deformation, and the detection rod 1 can be extended and retracted in the axial direction. When the force is unloaded, the elastic deformation of the buffer spring 8 disappears, and the detection rod 1 is reset.

[0040] The Haversian clamp connector 22 is fixedly connected to a sensor bracket 9 , and the sensor 3 is fixedly disposed on the sensor bracket 9 .

[0041] The upper end of the detection rod 1 is provided with a detection ring 10 matched with the sensor 3 along the circumferential direction, and the detection ring 10 is arranged above the casing sealing plate 5 .

[0042] Furthermore, a certain gap is provided between the detection rod 1 and the sealing plate through hole 51 and the supporting boss 41 respectively. When the detection rod 1 is subjected to radial force, under the elastic force of the plunger spring 6, the detection rod 1 can flexibly move to flexibly adjust its own posture and direction so as to match the detection rod 1 with the aperture of the product to be tested, thereby achieving accurate judgment of the aperture of the product to be tested.

[0043] The lower end of the detection rod 1 includes a connecting portion 12, an upper straight rod portion 13, and a lower straight rod portion 14. The connecting portion 12 is connected to the upper straight rod portion 13 by a transition arc surface. The upper straight rod portion 13 is connected to the lower straight rod portion 14 by a transition arc surface of a conical portion 15. The conical portion 15 is an inverted cone structure. The upper straight rod portion 13 and the lower straight rod portion 14 are both cylindrical rods, and the cross-sectional radius of the upper straight rod portion 13 is greater than the cross-sectional radius of the lower straight rod portion 14.

[0044] When encountering a standard aperture, the lower straight rod portion 14 is just fully inserted; when encountering an aperture slightly larger than the standard aperture, a portion of the tip of the tapered portion 15 will extend into the inner hole of the product, that is, the entire detection rod 1 moves down to a lower position; when encountering an aperture larger than the standard aperture and beyond the accuracy range, the upper straight rod portion 13 can also be fully inserted into the inner hole; the sensor 3 measures the downward movement distance of the detection rod 1 to determine whether the aperture is qualified.

[0045] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the technical principle of the present invention, and these improvements and modifications should also be regarded as within the protection scope of the present invention.

Claims

1. An adaptive aperture detection device, comprising a rod outer sleeve (4), a detection rod (1) elastically connected to the rod outer sleeve (4) along the axial direction, a main structure (2) fixedly connected to the outside of the rod outer sleeve (4), and a sensor (3) arranged on the rod outer sleeve (4) for detecting the movement stroke of the detection rod (1); characterized in that: A gap is provided between the detection rod (1) and the rod outer sleeve (4); The outer peripheral wall of the lower end of the rod outer sleeve (4) is radially provided with a plurality of plunger through holes (43), and elastic members are arranged in the plurality of plunger through holes (43). The elastic members have elastic potential energy that hinders the radial movement of the detection rod (1), and one end of the elastic member close to the detection rod (1) contacts the outer wall thereof.

2. The adaptive aperture detection device according to claim 1, characterized in that: The lower end of the rod outer sleeve (4) is provided with an annular supporting boss (41) extending in the radial direction, and the detection rod (1) is provided with a contact cam (11) matching the supporting boss (41), and the lower end surface of the contact cam (11) contacts the supporting boss (41).

3. The adaptive aperture detection device according to claim 2, characterized in that: The rod outer sleeve (4) is a straight-through structure. A sleeve sealing plate (5) is provided on the upper end surface of the rod outer sleeve (4). The sleeve sealing plate (5) has a sealing plate through hole (51) coaxial with the rod outer sleeve (4) for the detection rod (1) to pass through. A gap is provided between the detection rod (1) and the sealing plate through hole (51).

4. The adaptive aperture detection device according to claim 3, characterized in that: The detection rod (1) is provided with a buffer spring (8) on its outer sleeve, and the two ends of the buffer spring (8) respectively abut against the upper end surface of the abutting cam (11) and the lower end surface of the sleeve sealing plate (5).

5. The adaptive aperture detection device according to claim 1, characterized in that: The elastic member is a plunger spring (6), a limiting block (7) is fixedly provided at a corresponding position on the rod outer sleeve (4), and one end of the plunger spring (6) away from the detection rod (1) is located in the cylindrical blind hole of the limiting block (7).

6. The adaptive aperture detection device according to claim 5, characterized in that: An installation step is provided at one end of the plunger through hole (43) close to the detection rod (1); when the housing step of the plunger spring (6) abuts against the installation step, the head of the plunger spring (6) contacts the detection rod (1).

7. The adaptive aperture detection device according to claim 3, characterized in that: The main structure (2) comprises a Havers clamp connection piece (22), and the Havers clamp connection piece (22) is fixedly connected to the rod outer sleeve (4) by bolts via a second clamp (222).

8. The adaptive aperture detection device according to claim 7, characterized in that: The outer peripheral wall of the upper end of the rod outer sleeve (4) is recessed in the radial direction, and the recess cooperates with the sleeve sealing plate (5) to form an annular groove (42), and the second clamp (222) is located in the annular groove (42).

9. The adaptive aperture detection device according to claim 1, characterized in that: The lower end of the detection rod (1) comprises an upper straight rod portion (13) and a lower straight rod portion (14); the upper straight rod portion (13) and the lower straight rod portion (14) are connected via a transition arc surface of a conical portion (15); the conical portion (15) is an inverted conical table structure; the upper straight rod portion (13) and the lower straight rod portion (14) are both cylindrical rods, and the cross-sectional radius of the upper straight rod portion (13) is greater than the cross-sectional radius of the lower straight rod portion (14).

10. The adaptive aperture detection device according to claim 1, characterized in that: The upper end of the detection rod (1) is provided with a detection ring (10) that matches the sensor (3), and the detection ring (10) is arranged above the rod outer sleeve (4).

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