阅读说明：本技术 一种环式电感传感器 (Ring type inductive sensor ) 是由 周建峰 陈晓克 张红飞 于 2019-11-21 设计创作，主要内容包括：本发明的目的是提供一种便于携带,能够快速实现轴类端面台阶式直径的快速检测,更适用于长颈比较大的轴类直径快速检测的环式电感传感器,包括弹性元件、定位套、电磁感应器、拉簧、固定架、第一测量杆、第二测量杆,弹性元件为环形,弹性元件的下端与固定架固定连接、上端设置有开口,沿开口处竖直向上延伸有第一延伸段、第二延伸段,拉簧、电磁感应器水平设置在第一延伸段与第二延伸段之间,第一测量杆、第二测量杆分别固定设置在弹性元件上且对称设置,通过第一测量杆与第二测量杆与被测件接触从而带动弹性元件撑开,引起电磁感应器中的线圈和磁芯的相对位置的变化进而产生的电压变化从而得出被测件与标准值间的误差。(The invention aims to provide a ring-type inductance sensor which is convenient to carry, can quickly realize the quick detection of the step diameter of the end face of a shaft, and is more suitable for the quick detection of the diameter of the shaft with a larger long neck, comprising an elastic element, a positioning sleeve, an electromagnetic inductor, a tension spring, a fixed frame, a first measuring rod and a second measuring rod, wherein the elastic element is ring-shaped, the lower end of the elastic element is fixedly connected with the fixed frame, the upper end of the elastic element is provided with an opening, a first extending section and a second extending section vertically and upwardly extend along the opening, the tension spring and the electromagnetic inductor are horizontally arranged between the first extending section and the second extending section, the first measuring rod and the second measuring rod are respectively and fixedly arranged on the elastic element and symmetrically arranged, thereby drive elastic element through first measuring stick and second measuring stick and the contact of being surveyed the piece and strut, thereby arouse the change of the relative position of coil and magnetic core in the electromagnetic induction ware and the voltage variation that produces and obtain the error between being surveyed the piece and the standard value.)

1. A toroidal inductive sensor, comprising: the measuring device comprises an elastic element, an electromagnetic inductor, a tension spring, a fixing frame, a first measuring rod and a second measuring rod, wherein the elastic element is annular, the lower end of the elastic element is fixedly connected with the fixing frame, the upper end of the elastic element is provided with an opening, a first extending section and a second extending section vertically and upwardly extend along the opening, the tension spring is horizontally arranged between the first extending section and the second extending section and is not stressed, the electromagnetic inductor is horizontally arranged between the first extending section and the second extending section, one end of the electromagnetic inductor is fixedly connected with the second extending section, and a magnetic core of the electromagnetic inductor is fixedly connected with the first extending section;

the first measuring rod and the second measuring rod are respectively and fixedly arranged on the elastic element and symmetrically arranged, and rod bodies of the first measuring rod and the second measuring rod are located on the diameter of the elastic element and are horizontal to a straight line where the electromagnetic inductor is located.

2. The toroidal inductive sensor of claim 1, wherein: the measuring device is characterized by further comprising a positioning sleeve, the positioning sleeve is annular, the positioning sleeve is arranged in the elastic element ring and is not in contact with the elastic element ring, a hole through which the first measuring rod and the second measuring rod can penetrate is formed in the positioning sleeve, and the outer diameter of the positioning sleeve is smaller than the inner diameter of the elastic element.

3. The toroidal inductive sensor of claim 1, wherein: the front limit screw penetrates through the ring body of the elastic element and is fixedly connected with the elastic element; the second extension section is provided with a round hole, the rear limiting screw is horizontally arranged, penetrates through the round hole to be fixedly connected with the first extension section and is connected with the second extension section in a sliding mode, one end, close to the second extension section, of the rear limiting screw is further provided with a screw cap, the screw cap is fixedly connected with the rear limiting screw, and the diameter of the screw cap is larger than that of the round hole.

4. The toroidal inductive sensor of claim 1, wherein: the positioning device is characterized by further comprising a mounting seat, a housing, an upper cover plate and a lower cover plate, wherein a central guide hole is formed in the mounting seat, the positioning sleeve is fixedly mounted in the central guide hole through a screw, the housing is provided with an upper opening and a lower opening, the side wall of the housing is sleeved with the mounting seat, the sizes of the upper cover plate and the lower cover plate are respectively the same as the sizes of the upper opening and the lower opening of the housing, and the upper cover plate and the lower cover plate are respectively and fixedly arranged at the upper opening and the lower opening of.

5. The toroidal inductive sensor of claim 1, wherein: the electromagnetic induction device comprises an electromagnetic inductor, and is characterized by further comprising a display device and a PC, wherein the output end of the electromagnetic inductor is connected with the input end of the PC, and the output end of the PC is connected with the input end of the display device.

6. The toroidal inductive sensor of claim 2, wherein: the front limiting screw sleeve is fixedly arranged on the elastic element, an internal thread is arranged inside the front limiting screw sleeve, an external thread is arranged on the front limiting screw, and the front limiting screw penetrates through the front limiting screw sleeve to be in threaded connection with the front limiting screw sleeve.

7. The toroidal inductive sensor of claim 2, wherein: the rear limiting screw is provided with an external thread, the screw cap is annular, an internal thread is arranged in the ring of the screw cap, and the screw cap penetrates through the rear limiting screw and is in threaded connection with the rear limiting screw.

8. The toroidal inductive sensor of claim 1, wherein: the measuring device is characterized by further comprising a first measuring rod sleeve and a second measuring rod sleeve, wherein the first measuring rod sleeve and the second measuring rod sleeve are fixedly arranged on the elastic element respectively, internal threads are arranged inside the first measuring rod sleeve and the second measuring rod sleeve respectively, external threads are arranged on the first measuring rod and the second measuring rod respectively, and the first measuring rod and the second measuring rod penetrate through the first measuring rod sleeve and the second measuring rod sleeve and are in threaded connection with the first measuring rod sleeve and the second measuring rod sleeve.

9. The toroidal inductive sensor of claim 1, wherein: and a force adjusting screw is arranged on the tension spring.

Technical Field

The invention belongs to the technical field of part measurement, and particularly relates to an inductive sensor for precisely measuring displacement variables by using the stepped excircle diameter of a shaft end face.

Background

In the mechanical manufacturing industry, the realization of the diameter detection of precision shaft mechanical parts is a crucial link. The diameters of shaft parts have a plurality of step diameters with short axial lengths, for example, the diameter of a camshaft is phi 22+0/-0.015, the length is 3.5mm, and the online measurement needs to be realized by a quick detection means. At present, a plurality of ring-type outer diameter pneumatic calipers are used in the market and cannot be used due to the structural limitation of the area of the air hole; if the commonly used structure for detecting and designing the two opposite inductive sensors to be the structure for detecting the detection tool to perform sum and difference calculation is adopted, the positioning structure of the sensor is generally larger, higher in cost and not beneficial to the use of a user.

Disclosure of Invention

The invention aims to provide a ring type inductance sensor which is convenient to carry, can quickly detect the step diameter of the end face of a shaft, and is more suitable for quickly detecting the diameter of the shaft with a large long neck.

The technical scheme for solving the technical problems of the invention is as follows: a ring-type inductive sensor comprises an elastic element, a positioning sleeve, an electromagnetic inductor, a tension spring, a fixing frame, a first measuring rod and a second measuring rod, wherein the elastic element is annular, the lower end of the elastic element is fixedly connected with the fixing frame, an opening is formed in the upper end of the elastic element, a first extending section and a second extending section vertically and upwardly extend along the opening, the tension spring is horizontally arranged between the first extending section and the second extending section, two ends of the tension spring are respectively and fixedly connected with the first extending section and the second extending section, the tension spring is not stressed in an initial state, the electromagnetic inductor is horizontally arranged between the first extending section and the second extending section, one end of the electromagnetic inductor is fixedly connected with the second extending section, and a magnetic core of the electromagnetic inductor is fixedly connected with the first extending section;

the first measuring rod and the second measuring rod are respectively fixedly arranged on the elastic element and symmetrically arranged, and rod bodies of the first measuring rod and the second measuring rod are positioned on the diameter of the elastic element and are horizontal to a straight line where the electromagnetic inductor is positioned;

the measuring device is characterized by further comprising a positioning sleeve, the positioning sleeve is annular, the positioning sleeve is arranged in the elastic element ring and is not in contact with the elastic element ring, a hole through which the first measuring rod and the second measuring rod can penetrate is formed in the positioning sleeve, and the outer diameter of the positioning sleeve is smaller than the inner diameter of the elastic element.

The front limit screw penetrates through the ring body of the elastic element and is fixedly connected with the elastic element; the second extension section is provided with a round hole, the rear limiting screw is horizontally arranged, penetrates through the round hole to be fixedly connected with the first extension section and is connected with the second extension section in a sliding mode, one end, close to the second extension section, of the rear limiting screw is further provided with a screw cap, the screw cap is fixedly connected with the rear limiting screw, and the diameter of the screw cap is larger than that of the round hole.

The positioning device is characterized by further comprising a mounting seat, a housing, an upper cover plate and a lower cover plate, wherein a central guide hole is formed in the mounting seat, the positioning sleeve is fixedly mounted in the central guide hole through a screw, the housing is provided with an upper opening and a lower opening, the side wall of the housing is sleeved with the mounting seat, the sizes of the upper cover plate and the lower cover plate are respectively the same as the sizes of the upper opening and the lower opening of the housing, and the upper cover plate and the lower cover plate are respectively and fixedly arranged at the upper opening and the lower opening of.

The electromagnetic induction device comprises an electromagnetic inductor, and is characterized by further comprising a display device and a PC, wherein the output end of the electromagnetic inductor is connected with the input end of the PC, and the output end of the PLC is connected with the input end of the display device.

The front limiting screw self-locking screw sleeve is fixedly arranged on the elastic element, threads are arranged inside the front limiting screw self-locking screw sleeve, and the front limiting screw penetrates through the front limiting screw self-locking screw sleeve to be in threaded connection with the front limiting screw sleeve.

The rear limiting screw is provided with threads, and the screw cap penetrates through the rear limiting screw to be in threaded connection with the rear limiting screw.

The measuring device is characterized by further comprising a first measuring rod sleeve and a second measuring rod sleeve, wherein the first measuring rod sleeve and the second measuring rod sleeve are respectively fixedly arranged on the elastic element, threads are arranged inside the first measuring rod sleeve and the second measuring rod sleeve, and the first measuring rod and the second measuring rod penetrate through the first measuring rod sleeve and the second measuring rod sleeve to be in threaded connection with the first measuring rod sleeve and the second measuring rod sleeve.

And the tension spring is provided with a force adjusting screw for adjusting the elasticity of the tension spring.

The invention has the beneficial effects that: there is open-ended annular elastic element through setting up the upper end, there is the extension section along the vertical upwards extension of opening part, the level is provided with magnetic inductor and extension spring between the extension section, two crossing points along being on a parallel with the linear elastic element diameter in electromagnetic inductor place and elastic element are provided with the first measuring stick with the straight line horizontally at electromagnetic inductor place, the second measuring stick, thereby drive elastic element and strut with being surveyed the piece contact through first measuring stick and second measuring stick, thereby arouse the change of the relative position of coil in the electromagnetic inductor and magnetic core and then the voltage variation who produces and draw the error between being surveyed piece and standard value.

Drawings

Fig. 1 is a schematic structural view of the present invention.

Fig. 2 is a side view of the present invention.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in the figure I, the invention comprises an elastic element 1, an electromagnetic inductor 3, a tension spring 4, a fixed frame 5, a first measuring rod 6 and a second measuring rod 7, the elastic element 1 is annular, the lower end of the elastic element 1 is fixedly connected with a fixed frame 5, the upper end of the elastic element 1 is provided with an opening, a first extension section 8 and a second extension section 9 vertically extend upwards along the opening, the tension spring 4 is horizontally arranged between the first extension section 8 and the second extension section 9, two ends of the tension spring 4 are respectively and fixedly connected with the first extension section 8 and the second extension section 9, the tension spring 4 is not stressed in an initial state, the electromagnetic inductor 3 is horizontally arranged between the first extension section 8 and the second extension section 9, one end of the electromagnetic inductor 3 is fixedly connected with the second extension section 9, and a magnetic core of the electromagnetic inductor 3 is fixedly connected with the first extension section 8;

the first measuring rod 6 and the second measuring rod 7 are respectively fixedly arranged on the elastic element 1 and symmetrically arranged, and rod bodies of the first measuring rod 6 and the second measuring rod 7 are positioned on the diameter of the elastic element 1 and are horizontal to a straight line where the electromagnetic inductor 3 is positioned;

still include position sleeve 2, position sleeve 2 is the annular, position sleeve 2 sets up in elastic element 1 intra-annular and both contactless, it has the hole that can make first measuring stick 6, second measuring stick 7 pass to open on position sleeve 2, the external diameter of position sleeve 2 is less than the internal diameter of elastic element 1.

The device also comprises an electromagnetic inductor 3, a tension spring 4, a front limit screw 10 and a rear limit screw 11, wherein the electromagnetic inductor 3, the tension spring 4 and the elastic element 1 are prevented from being damaged due to the fact that the elastic element 1 exceeds the measuring range, and the front limit screw 10 penetrates through a ring body of the elastic element 1 and is fixedly connected with the elastic element 1; it has the round hole to open on the second extension section 9, back stop screw 11 level sets up, passes round hole and 8 fixed connection of first extension section, and 9 sliding connection with the second extension section, back stop screw 11 is close to the one end of second extension section 9 and still is provided with head of a nail 12, head of a nail 12 and back stop screw 11 fixed connection, the diameter of head of a nail 12 is greater than the diameter of round hole, and preceding stop screw 10 prevents that elastic element 1 from inwards contracting the overrange, and back stop screw 11 prevents that elastic element 1 from outwards expanding the overrange and causing electromagnetic inductor 3 and extension spring 4 to damage.

The novel protective device is characterized by further comprising a mounting seat 13, a housing 14, an upper cover plate 15 and a lower cover plate 16 which play a role in fixing and protecting, wherein a central guide hole is formed in the mounting seat 13, the positioning sleeve 2 is fixedly mounted in the central guide hole through a screw, the housing 14 is sleeved with an upper opening and a lower opening, the side wall of the housing 14 is sleeved with the mounting seat 13, the sizes of the upper cover plate 15 and the lower cover plate 16 are respectively the same as the sizes of the upper opening and the lower opening of the housing 14, and the upper cover plate 15 and the lower cover plate 16 are respectively fixedly arranged at the upper opening and.

Still include display device, PC, electromagnetic inductor 3's output is connected with PC's input, PC's output is connected with display device's input, directly shows on display device to measuring data, and the measurement personnel of being convenient for watch.

The front limiting screw sleeve 17 is fixedly arranged on the elastic element 1, an internal thread is arranged inside the front limiting screw sleeve 17, an external thread is arranged on the front limiting screw 10, the front limiting screw 10 penetrates through the front limiting screw sleeve 17 and is in threaded connection with the front limiting screw sleeve 17, and the length of the inward protruding part of the front limiting screw 10 can be adjusted, so that the front limiting screw 10 can be adjusted.

The rear limiting screw 11 is provided with an external thread, the screw cap 12 is annular, an internal thread is arranged in the ring of the screw cap 12, the screw cap 12 penetrates through the rear limiting screw 11 to be in threaded connection with the rear limiting screw 11, and the limiting distance of the rear limiting screw 11 can be adjusted by adjusting the position of the screw cap 12.

The measuring device is characterized by further comprising a first measuring rod sleeve 18 and a second measuring rod sleeve 19, wherein the first measuring rod sleeve 18 and the second measuring rod sleeve 19 are fixedly arranged on the elastic element 1 respectively, internal threads are arranged inside the first measuring rod sleeve 18 and the second measuring rod sleeve 19 respectively, external threads are arranged on the first measuring rod 6 and the second measuring rod 7 respectively, and the first measuring rod 6 and the second measuring rod 7 penetrate through the first measuring rod sleeve 18 and the second measuring rod sleeve 19 to be in threaded connection with the first measuring rod sleeve 18 and the second measuring rod sleeve 19, so that the length of the inward protruding parts of the first measuring rod 6 and the second measuring rod 7 can be adjusted.

The tension spring 4 is provided with a force adjusting screw 20 for adjusting the elasticity of the tension spring.

In the invention, the principle of the ring-type inductive sensor conforms to the differential inductive displacement sensor, the first extension segment 8 and the second extension segment 9 only cause the voltage change caused by the change of the relative position of the coil and the magnetic core in the electromagnetic inductor 3 by using the fixed position of the lower end of the elastic element 1 as a fulcrum, and the condition that the deflection is not linear does not need to be considered.

When the positioning sleeve is used, firstly, the positioning sleeve is installed, firstly, the rear limiting screw 11 is loosened, the front and rear positions of the front limiting screw 10 are adjusted and are in contact with the outer wall of the positioning sleeve 2, and the gap between the elastic element 1 and the outer circle diameter of the positioning sleeve 2 is uniform visually; then the gap between the nut 12 of the limiting screw 11 and the second extension 9 of the elastic element is adjusted to be 0.6 mm.

The coil and the magnetic core used in the electromagnetic inductor 3 used by the invention are both the coil and the magnetic core of a JT-502A lever type sensor which is a mature product of the original energy instrument company Limited in the three gorges, the linearity and the range of the coil and the magnetic core are determined, and the use of the measuring range of +/-250 um can be met.

After the installation finishes, need calibrate annular sensor, use instruments such as inductance micrometer, accurate fine motion rack, accurate tapering standard sample axle, inductance micrometer needs to use with supporting such as special electronic box or electron post, at first fixes annular sensor on the mounting bracket of accurate fine motion rack, and electromagnetic inductor 3 is connected with inductance micrometer.

The precision taper standard sample shaft is a standard device for accurately calibrating the taper and the diameter through precision measurement, and is fixed on a micro-motion platform of a precision micro-motion platform, so that the small end of the precision taper standard sample shaft is guided to penetrate through an annular sensor, is concentric with a positioning sleeve 2 of the annular sensor, and is in contact with a first measuring rod 6 and a second measuring rod 7.

The precise bench is provided with a differential ruler, the differential ruler is provided with scales, the differential ruler is rotated to drive a micro-motion platform to move, the micro-motion platform drives a precise taper standard sample shaft to move, the taper of the precise taper standard sample shaft enables a first measuring rod 6 and a second measuring rod 7 to be opened, the first measuring rod 6 and the second measuring rod 7 drive an elastic element 1 to be opened, a first extending section 8 and a second extending section 9 are opened to drive a coil and a magnetic core in an electromagnetic inductor 3 to slightly move relatively, voltage change is generated, and the voltage change depends on the displacement. The change in voltage is displayed on an electrical micrometer.

For example, when a positioning sleeve with specifications of phi 25+0.05/0, an upper limit phi 25.05 and a lower limit phi 25.00 is used for measurement, the middle limit value is phi 25.025, the micro-motion stage drives the precision taper standard sample shaft to move to the precision taper standard sample shaft with the diameter of phi 25.025, the display value on the inductance micrometer is at zero position at the moment, then the diameter of the precision taper standard sample shaft is adjusted to the upper limit phi 25.05, if the advancing scale of the differential scale on the precision stage is inconsistent with the size change measured by the inductance micrometer, the amplifier circuit board potentiometer on the special electric box needs to be adjusted to be consistent with the two, the upper limit is calibrated, then the diameter of the precision taper standard sample shaft is adjusted to the lower limit phi 25.00, if the advancing scale of the differential scale on the precision stage is inconsistent with the size change measured by the inductance micrometer, the amplifier circuit board potentiometer on the special electric box needs to be adjusted to be consistent with the two, calibration of the lower limit is completed.

The method comprises the steps of taking out a precise taper standard sample shaft, placing a measured piece in a fixed outer sleeve, wherein in practical application, the gap between the maximum physical size of the measured part and the positioning sleeve 2 is 0.03-0.04 cm during measurement, when the measured piece is in contact with a first measuring rod 6 and a second measuring rod 7 and the size of the measured piece and a standard value (a zero value displayed on an inductance micrometer) are compared to have an error, the first measuring rod 6 and the second measuring rod 7 rotate slightly by taking the fixed position at the lower end of an elastic element 1 as a fulcrum, a coil in an electromagnetic inductor 3 and a magnetic core are subjected to relative displacement, a generated electric signal is processed and transmitted to a display device through a PC (personal computer), a measurement result is displayed, and the difference between the measurement result and the measurement result when the standard value is placed is an actual error.

In the invention, specification classification is carried out according to the measured diameter size, the measured pieces with different specifications, such as phi 15-phi 20, phi 20-phi 25, phi 25-phi 30 and the like, are measured by changing the integral size of the ring sensor, and the currently maximum designed outer diameter detection size phi 80 is provided; when each specification is installed, the installation is adjusted according to the maximum limit of the specification, for example, the specification phi 20-25 mm specification is debugged and installed according to the diameter phi 25, so that the compatibility to phi 20 from large to small is facilitated; different diameters are detected in the same specification, the positioning sleeves 2 with different inner diameters in the specification are required to be used, and only the different positioning sleeves 2 and the corresponding calibration pieces need to be replaced. The replacement of the new position sleeve 2 and the calibration piece is necessary to recalibrate the magnification.

The invention is provided with an annular elastic element with an opening at the upper end, an extension section vertically and upwards extends along the opening, a magnetic inductor and a tension spring are horizontally arranged between the extension sections, a first measuring rod and a second measuring rod which are horizontal to a straight line of the electromagnetic inductor are arranged at two intersection points of the diameter of the elastic element parallel to the straight line of the electromagnetic inductor and the elastic element, the first measuring rod and the second measuring rod are in contact with a tested piece to drive the elastic element to be unfolded, and the relative position change of a coil and a magnetic core in the electromagnetic inductor is caused to further generate voltage change so as to obtain the error between the tested piece and a standard value.