Measuring device for special-shaped shaft

Abstract

The utility model relates to the technical field of circle run-out measurement, and provides a measuring device for a special-shaped shaft, which comprises a base, the top end of the base is fixedly connected with a rotating shaft mounting plate, the inner side of the rotating shaft mounting plate is provided with a rotating shaft, the side surface of the rotating shaft is provided with a detection mainboard, one end of the detection mainboard is provided with a detection front plate, and the other end of the detection mainboard is provided with a detection rear plate. A measuring arm plate is arranged on the side face of the front detection plate, an insertion groove is formed in the end, away from the front detection plate, of the measuring arm plate, an arc contact block is arranged on the inner side of the insertion groove, a displacement sensor is arranged on the side, away from the base, of the sensor mounting base, and a telescopic air cylinder is arranged on the side, away from the rotating shaft mounting plate, of the base. The special-shaped shaft circle run-out measuring device realizes circle run-out measurement of a special-shaped shaft, has accuracy, repeatability and authenticity of measured data, has reference value, is relatively free in installation position, can quickly adapt to actual requirements of factory production, and has certain economic value.

Description

TECHNICAL FIELD

[0001] The utility model relates to round runout measurement technical field, concretely is a kind of measuring device of special-shaped shaft. BACKGROUND

[0002] When the shaft parts commonly seen in processing industry, such as motor shaft, automobile shaft, screw shaft, etc., usually need to be straightened to ensure that the shaft parts do not eccentric when rotating;In the related process of straightening, the bending condition of the shaft parts is usually judged by measuring the round runout of the shaft parts;Round runout measurement usually refers to the difference between the maximum and minimum readings obtained by a fixed measuring device in a given direction when the measured element rotates around the reference axis, and is suitable for surface complete round bar shafts and surface incomplete but regular distributed round bar shafts, such as lead screw, bolt, spline shaft, etc.

[0003] Chinese patent application No. CN202310792112.4, a round runout detection device, comprising a base, a TM camera is fixedly installed on the base, a sliding groove is formed in the base, a support positioning mechanism is slidably connected inside the sliding groove, a first mounting plate is connected to the support positioning mechanism, an electric telescopic rod is installed on the first mounting plate, a second connecting plate is connected to the electric telescopic rod, a first connecting plate is connected to the second connecting plate, a third connecting plate is connected to the first connecting plate, a first shaft is provided through the third connecting plate, a pressure roller is connected to the first shaft, a motor is connected to the first connecting plate, and the motor is connected to the first shaft. By changing the contact of the spoke to two groups of point contact, the rotation of the bar is driven by a group of up and down movable soft rubber pressure rollers, and the detection of round runout is a group of Keyence TM cameras. The bar rotates within the detection range of the TM camera, and the TM camera feeds back the round runout of the bar in real time, which can better improve the accuracy of detection. But the above patent uses camera to measure round runout data, the cost of detection is too high, which is not conducive to cost control in factory production, and camera measurement cannot guarantee the accuracy, repeatability and authenticity of measurement data.

[0004] Therefore, the utility model provides a kind of measuring device of special-shaped shaft to solve the above problems. Utility model content

[0005] The utility model provides a kind of measuring device of special-shaped shaft, by design can adapt to the arc contact block of special-shaped shaft, to solve the problem that round runout measurement data in prior art does not have reference value.

[0006] The specific technical solution of the utility model is as follows:

[0007] The utility model provides a kind of measuring device of special-shaped shaft, the top of the base is fixedly connected with the rotating shaft mounting plate, the inner side of the rotating shaft mounting plate is provided with rotating shaft, the side of the rotating shaft is provided with detection mainboard, one end of the detection mainboard is provided with detection front plate, the side of the detection front plate is provided with measuring arm plate, the end of the measuring arm plate away from detection front plate is equipped with slot, the inner side of the slot is provided with circular arc contact block, the upper surface of the circular arc contact block is semicircular arc surface, the circular arc contact block is rotatably connected with measuring arm plate, the arc surface of the circular arc contact block is equipped with magnet mounting hole, the middle of the base one side is provided with sensor mounting seat, the side of the sensor mounting seat away from base is provided with displacement sensor, the side of the base away from rotating shaft mounting plate is provided with telescopic pneumatic cylinder;Wherein circular arc contact block is used to contact with the surface of special-shaped shaft, to enhance the authenticity of measurement data.

[0008] Preferably, the bottom surface of the detection mainboard is fixedly connected with a spring support one, the spring support one is detachably connected with a spring below, the bottom end of the spring is detachably connected with a spring support two, the bottom end of the spring support two is fixedly connected with a spring mounting seat, a limiting hole one is formed in the side of the spring mounting seat, a plurality of threaded holes are formed in the side of the base close to the spring mounting seat, and the spring mounting seat is detachably connected with the base through the limiting hole one, the threaded holes and screws.

[0009] Preferably, the side of the sensor mounting seat is provided with a limiting hole two, the sensor mounting seat is detachably connected with the base through the limiting hole two, the threaded holes and screws, a spring through hole is formed in the upper surface of the sensor mounting seat, an elastic groove is formed in the side of the sensor mounting seat away from the spring through hole, the size of the elastic groove is adapted to the displacement sensor, and a locking hole is formed in the side of the sensor mounting seat close to the elastic groove.

[0010] Preferably, a bearing is arranged between the rotating shaft and the rotating shaft mounting plate, and the bearing is provided with a bearing cover plate away from the rotating shaft mounting plate.

[0011] Preferably, the two sides of the detection front plate are provided with mounting grooves, an installation hole one is formed in the end of the detection mainboard close to the detection front plate, and a fixed screw is threadedly connected with the side of the installation hole one close to the detection front plate.

[0012] Preferably, an installation hole two is formed in the side of the detection front plate close to the measuring arm plate, a limiting hole three is formed in the side of the measuring arm plate close to the installation hole two, and the detection front plate is detachably connected with the measuring arm plate through the installation hole two, the limiting hole three and screws.

[0013] Preferably, the side of the telescopic pneumatic cylinder is provided with a gas joint.

[0014] Preferably, the bottom end of the circular arc contact block is provided with a mounting hole three, the end of the measuring arm plate close to the mounting hole three is provided with a mounting hole four, the inner side of the mounting hole three is detachably connected with a hinge pin, and the circular arc contact block is rotationally connected with the measuring arm plate through the mounting hole three, the mounting hole four and the hinge pin.

[0015] Preferably, the end of the measuring arm plate close to the circular arc contact block is provided with an inclined pull groove one and an inclined pull groove two, and the sizes of the inclined pull groove one and the inclined pull groove two are adapted to the circular arc contact block.

[0016] Preferably, the inside of the magnet mounting hole is provided with a magnet.

[0017] Compared with the prior art, the utility model has the advantages that:

[0018] 1. The utility model discloses a circular runout measuring device for irregular shaped shaft, which comprises a base, a bearing cover plate, a bearing, a shaft, a measuring arm plate, a circular arc contact block, a detection main plate and a displacement sensor.

[0019] 2. The utility model discloses a lever principle based on the design of the pivot and the detection main plate, reduces the displacement of the detection main plate relative to the displacement sensor, solves the problem that the displacement sensor detection range is small, expands the detection range of the displacement sensor, and is convenient for the staff to analyze the circular runout data of the irregular shaped shaft based on the displacement sensor to identify whether the irregular shaped shaft meets the production standard.

[0020] 3. The utility model discloses a lever principle based on the design of the pivot and the detection main plate, reduces the displacement of the detection main plate relative to the displacement sensor, solves the problem that the displacement sensor detection range is small, expands the detection range of the displacement sensor, and is convenient for the staff to analyze the circular runout data of the irregular shaped shaft based on the displacement sensor to identify whether the irregular shaped shaft meets the production standard.

[0021] 4. The utility model discloses a lever principle based on the design of the pivot and the detection main plate, reduces the displacement of the detection main plate relative to the displacement sensor, solves the problem that the displacement sensor detection range is small, expands the detection range of the displacement sensor, and is convenient for the staff to analyze the circular runout data of the irregular shaped shaft based on the displacement sensor to identify whether the irregular shaped shaft meets the production standard. ACCURATE

[0022] Figure 1 It is the whole structure schematic diagram of the utility model.

[0023] Figure 2 It is the base schematic diagram of the utility model.

[0024] Figure 3 It is the bearing cover plate schematic diagram of the utility model.

[0025] Figure 4 It is the pivot schematic diagram of the utility model.

[0026] Figure 5 is the front plate schematic diagram of the utility model.

[0027] Figure 6 is the arm plate schematic diagram of the utility model.

[0028] Figure 7 is the third limiting hole schematic diagram of the utility model.

[0029] Figure 8 is the slot schematic diagram of the utility model.

[0030] Figure 9 is the spring schematic diagram of the utility model.

[0031] Figure 10 is the displacement sensor schematic diagram of the utility model.

[0032] Figure 11 is the sensor mounting seat schematic diagram of the utility model.

[0033] Figure 12 is the elastic groove schematic diagram of the utility model.

[0034] Figure 13 is the telescopic cylinder schematic diagram of the utility model.

[0035] Figure 14 is the spring mounting seat schematic diagram of the utility model.

[0036] Figure 15 is the arc contact block schematic diagram of the utility model.

[0037] Figure 16 is the first inclined pull groove schematic diagram of the utility model.

[0038] Figure 17 is the anticlockwise rotation schematic diagram of the arc contact block of the utility model.

[0039] Figure 18 is the clockwise rotation schematic diagram of the arc contact block of the utility model.

[0040] Figure 19 is the 90 ° rotation schematic diagram of the first embodiment of the utility model.

[0041] Figure 20 is the 180 ° rotation schematic diagram of the first embodiment of the utility model.

[0042] Figure 21 is the second embodiment schematic diagram of the utility model.

[0043] Figure 22 is the third embodiment schematic diagram of the utility model.

[0044] In the drawings:

[0045] 1, base; 101, pivot mounting plate; 2, pivot; 3, detection main plate; 4, detection front plate; 5, measuring arm plate; 501, slot; 6, arc contact block; 602, magnet mounting hole; 7, sensor mounting seat; 8, displacement sensor; 11, telescopic cylinder; 301, spring support one; 9, spring; 1001, spring support two; 10, spring mounting seat; 1002, limit hole one; 103, threaded hole; 703, limit hole two; 701, spring through hole; 702, elastic groove; 704, locking hole; 201, bearing; 202, bearing cover plate; 403, mounting groove; 302, mounting hole one; 402, fixing screw; 401, mounting hole two; 502, limit hole three; 1101, gas connector; 601, mounting hole three; 503, mounting hole four; 603, hinge pin; 504, inclined pull groove one; 505, inclined pull groove two; 12, D-shaped shaft; 13, concave shaft; 14, spline shaft. DETAILED DESCRIPTION

[0046] The embodiments of the present application will be further described in conjunction with the drawings and examples. The following examples are used to illustrate the present application, but cannot be used to limit the scope of the present application.

[0047] As Figures 1-22 shown, the present application provides a kind of measuring device of special-shaped shaft, including base 1, the top of the base 1 is fixedly connected with pivot mounting plate 101, the inner side of the pivot mounting plate 101 is provided with pivot 2, the side of the pivot 2 is provided with detection main plate 3, one end of the detection main plate 3 is provided with detection front plate 4, the side of the detection front plate 4 is provided with measuring arm plate 5, the end of the measuring arm plate 5 away from detection front plate 4 is provided with slot 501, the inner side of the slot 501 is provided with arc contact block 6, the upper surface of the arc contact block 6 is semicircular arc surface, the arc contact block 6 is rotationally connected with measuring arm plate 5, the arc surface of the arc contact block 6 is provided with magnet mounting hole 602, the middle side of the base 1 is provided with sensor mounting seat 7, the side of the sensor mounting seat 7 away from base 1 is provided with displacement sensor 8, the side of the base 1 away from pivot mounting plate 101 is provided with telescopic cylinder 11;Wherein arc contact block 6 is used to contact with the surface of special-shaped shaft, displacement sensor 8 is used to measure circle runout data.

[0048] As an embodiment of the utility model, the bottom surface of the detection mainboard 3 is fixedly connected with spring support one 301, the lower portion of spring support one 301 is detachably connected with spring 9, the bottom end of spring 9 is detachably connected with spring support two 1001, the bottom end of spring support two 1001 is fixedly connected with spring mounting seat 10, the side surface of spring mounting seat 10 is provided with limiting hole one 1002, the side of base 1 close to spring mounting seat 10 is provided with a plurality of threaded holes 103, and spring mounting seat 10 is detachably connected with base 1 through limiting hole one 1002, threaded hole 103 and screw.

[0049] As an embodiment of the utility model, the side surface of sensor mounting seat 7 is provided with limiting hole two 703, sensor mounting seat 7 is detachably connected with base 1 through limiting hole two 703, threaded hole 103 and screw, the upper surface of sensor mounting seat 7 is provided with spring through hole 701, the side of sensor mounting seat 7 away from spring through hole 701 is provided with elastic groove 702, the size of elastic groove 702 is adapted to displacement sensor 8, and the side of sensor mounting seat 7 close to elastic groove 702 is provided with locking hole 704.

[0050] As an embodiment of the utility model, bearing 201 is arranged between rotating shaft 2 and rotating shaft mounting plate 101, and bearing cover plate 202 is arranged on the side of bearing 201 away from rotating shaft mounting plate 101.

[0051] As an embodiment of the utility model, the two sides of detection front plate 4 are provided with mounting grooves 403, one end of detection mainboard 3 close to detection front plate 4 is provided with mounting hole one 302, and the side of mounting hole one 302 close to detection front plate 4 is threadedly connected with fixed screw 402; wherein detection front plate 4 is reversibly and flexibly mounted and left-right adjusted through mounting groove 403 and fixed screw 402.

[0052] As an embodiment of the utility model, the side of detection front plate 4 close to measuring arm plate 5 is provided with mounting hole two 401, the side of measuring arm plate 5 close to mounting hole two 401 is provided with limiting hole three 502, and detection front plate 4 is detachably connected with measuring arm plate 5 through mounting hole two 401, limiting hole three 502 and screw; wherein measuring arm plate 5 is up-down adjusted through screw, mounting hole two 401 and limiting hole three 502.

[0053] As an embodiment of the utility model, the side surface of telescopic air cylinder 11 is provided with air joint 1101; wherein air joint 1101 is used for conveying compressed gas to realize mechanical movement.

[0054] As an embodiment of the utility model, the bottom end of the arc contact block 6 is provided with a mounting hole three 601, the end of the measuring arm plate 5 close to the mounting hole three 601 is provided with a mounting hole four 503, the inner side of the mounting hole three 601 is detachably connected with a hinge pin 603, and the arc contact block 6 is rotationally connected with the measuring arm plate 5 through the mounting hole three 601, the mounting hole four 503 and the hinge pin 603.

[0055] As an embodiment of the utility model, the end of the measuring arm plate 5 close to the arc contact block 6 is provided with an inclined pull groove one 504 and an inclined pull groove two 505, and the sizes of the inclined pull groove one 504 and the inclined pull groove two 505 are adapted to the arc contact block 6; wherein the inclined pull groove one 504 and the inclined pull groove two 505 are used for adapting the large amplitude swing of the arc contact block 6, and ensure the normal operation of the roundness measurement work.

[0056] As an embodiment of the utility model, the inside of the magnet mounting hole 602 is provided with a magnet.

[0057] Embodiment 1:

[0058] As shown in the drawings, the embodiment takes the roundness data of the shaft workpiece with the approximate D-shaped section in a certain factory as an example. Figures 1-20

[0059] When the conventional shaft workpiece is measured for roundness, the shape of the shaft workpiece is often not designed. For example, two standard round bars are selected, and a plurality of irregular pits are manufactured on the surface of the round bar without considering the change of the roundness and straightness, and then the two standard round bars are measured at the same time. The measurement data of the two standard round bars are obviously different due to the influence of the pit defects. In theory, the pit defects do not change the roundness and straightness of the standard round bar. Obviously, the measurement data of the standard round bar with pit defects often does not have reference value.

[0060] Further, for the shaft workpiece with the D-shaped section, the roundness and straightness are similar to those of the standard round bar in essence, but the measurement data is quite different from that of the standard round bar by using the conventional roundness measurement method, and does not have reference value. When the D-shaped shaft workpiece is bent due to operation error or other reasons, the measurement tool will swing greatly during measurement, which easily leads to poor contact between parts, jamming, affects the production and processing efficiency of the factory, and causes economic loss.

[0061] As shown in the drawings, Figure 1 ​As shown in the embodiment, the staff can quickly install the arc contact block 6 to the designated position of the automatic production line by using the structural design of the base 1, the detection main plate 3, the detection front plate 4, the measurement arm plate 5 and the arc contact block 6, so as to adapt to the installation position and height of each component of the automatic production line.

[0062] As shown in the embodiment, the staff can quickly install the arc contact block 6 to the designated position of the automatic production line by using the structural design of the base 1, the detection main plate 3, the detection front plate 4, the measurement arm plate 5 and the arc contact block 6, so as to adapt to the installation position and height of each component of the automatic production line. Figure 16 As shown in the embodiment, the staff can quickly install the arc contact block 6 to the designated position of the automatic production line by using the structural design of the base 1, the detection main plate 3, the detection front plate 4, the measurement arm plate 5 and the arc contact block 6, so as to adapt to the installation position and height of each component of the automatic production line.

[0063] As shown in the embodiment, the staff can quickly install the arc contact block 6 to the designated position of the automatic production line by using the structural design of the base 1, the detection main plate 3, the detection front plate 4, the measurement arm plate 5 and the arc contact block 6, so as to adapt to the installation position and height of each component of the automatic production line. Figure 15 As shown in the embodiment, the staff can quickly install the arc contact block 6 to the designated position of the automatic production line by using the structural design of the base 1, the detection main plate 3, the detection front plate 4, the measurement arm plate 5 and the arc contact block 6, so as to adapt to the installation position and height of each component of the automatic production line.

[0064] Further, the staff can make the D-shaped shaft 12 rotate above the arc contact block 6 by using the rotation function of the automatic production line; as shown in the embodiment, when the non-circular surface of the D-shaped shaft 12 is upward, the lower arc surface of the D-shaped shaft 12 is completely attached to the arc contact block 6; when the non-circular surface of the D-shaped shaft 12 contacts the inner arc of the arc contact block 6, part of the inner arc of the arc contact block 6 is still attached to the arc surface of the D-shaped shaft 12; when the non-circular surface of the D-shaped shaft 12 is downward, the bottom of the inner arc of the arc contact block 6 is no longer attached to the D-shaped shaft 12, but the inner arcs on both sides of the arc contact block 6 are still attached to the D-shaped shaft 12; it can be seen that no matter how the D-shaped shaft 12 rotates, the non-circular part will not affect the arc contact block 6, as long as part of the outer wall of the arc of the D-shaped shaft 12 is still attached to the arc contact block 6, the roundness runout measurement can be performed. Figures 19-20 As shown in the embodiment, the staff can quickly install the arc contact block 6 to the designated position of the automatic production line by using the structural design of the base 1, the detection main plate 3, the detection front plate 4, the measurement arm plate 5 and the arc contact block 6, so as to adapt to the installation position and height of each component of the automatic production line.

[0065] Figure 16 ​As shown, for a D-type shaft 12 that conforms to production standards, rotating on the arc contact block 6 will not cause the arc contact block 6 to move; if a D-type shaft 12 bends due to production errors or other reasons, when the D-type shaft 12 rotates on the arc contact block 6, the bent part will push the arc contact block 6 to move; when the arc contact block 6 moves, as... Figure 1 As shown, by measuring the arm plate 5 and the front detection plate 4, the displacement of the arc contact block 6 is transmitted to the main detection plate 3, causing the main detection plate 3 to rotate relative to the rotating shaft 2. The lever principle is used to reduce the displacement of the main detection plate 3 relative to the displacement sensor 8, which facilitates the displacement sensor 8 to detect the main detection plate 3. Since the detection range of the displacement sensor 8 commonly used in factories is relatively small, usually around 10 mm, reducing the displacement of the main detection plate 3 relative to the displacement sensor 8 can effectively increase the detection range of the displacement sensor 8 and expand the applicability of this embodiment. At this time, the operator can analyze the straightness of the D-shaped shaft 12 based on the change in the detection value of the displacement sensor 8 to determine whether the D-shaped shaft 12 meets the production standards.

[0066] Furthermore, such as Figures 16-18 As shown, when the bending degree of the D-shaped shaft 12 is large, its rotation will cause the arc contact block 6 to rotate significantly to the left or right. In this embodiment, by opening an inclined groove 504 and an inclined groove 505 on the measuring arm plate 5, the arc contact block 6 has a certain rotation space, so as to avoid the arc contact block 6 getting stuck during measurement and affecting the normal production of the factory.

[0067] In addition, such as Figure 9 As shown, this embodiment utilizes the structural design of the sensor mounting base 7 and the spring mounting base 10 to make the installation positions of the displacement sensor 8 and the spring 9 flexible and adjustable, which can quickly adapt to the actual needs of automated production lines and facilitate installation and use by staff.

[0068] This embodiment achieves circular runout measurement of the D-shaped shaft 12 through the arc contact block 6, the detection main board 3, and the displacement sensor 8. The measurement data is accurate, repeatable, and reliable, and has reference value, solving the problem that existing measurement methods are not suitable for irregularly shaped shafts. Based on the lever principle, this embodiment reduces the displacement of the detection main board 3 relative to the displacement sensor 8 through the design of the rotating shaft 2 and the detection main board 3, expanding the detection range of the displacement sensor 8. This facilitates the analysis of the circular runout data of the irregularly shaped shaft by the staff based on the displacement sensor 8 to determine whether the irregularly shaped shaft meets production standards. The various components of this embodiment are flexible and detachable, and the installation position is relatively free, which can quickly adapt to the actual needs of factory production and has certain economic value. This embodiment enhances the stability of the contact block 6 and the D-shaped shaft 12 by using the arc contact block 6 and the magnet, avoiding the problem that the curved D-shaped shaft 12 will quickly throw off the arc contact block 6 when rotating, making it impossible to continue the circular runout measurement.

[0069] Example 2:

[0070] like Figures 1-15 As shown in Figure 21, this embodiment is basically the same as embodiment 1, except that this embodiment takes the measurement of the circular runout data of a shaft workpiece with a concave surface in a factory as an example.

[0071] like Figure 21 As shown, existing circular runout measuring tools are prone to conflict with the recessed area of ​​the concave shaft 13, resulting in problems such as jamming and stuck. In this embodiment, based on the same principle as in embodiment 1, as long as the outer arc of the concave shaft 13 is in contact with the arc contact block 6, circular runout measurement can be performed, thereby avoiding the influence of the non-circular surface of the concave shaft 13 on the circular runout measurement.

[0072] Furthermore, the concave shape of the concave shaft 13 can be any irregular shape without affecting the normal measurement process of the arc contact block 6, thus expanding its applicability.

[0073] This embodiment demonstrates the adaptability of the arc contact block 6 to the internal concave shape of shaft-type workpieces.

[0074] Example 3:

[0075] like Figures 1-15 As shown in Figure 22, this embodiment is basically the same as embodiment 1, except that this embodiment takes the circular runout data of a shaft workpiece with an approximate flower-shaped cross-section as an example.

[0076] like Figure 22As shown, existing circular runout measuring tools are often limited by the protruding part of the spline shaft 14, making it impossible to effectively measure the circular runout of the spline shaft 14. In this embodiment, based on the same principle as in embodiment 1, as long as the outer arc wall of the spline shaft 14 is in contact with the arc contact block 6, circular runout measurement can be performed, thereby avoiding the protruding part of the spline shaft 14 from affecting the circular runout measurement.

[0077] Furthermore, the protruding area of ​​the spline shaft 14 can be further reduced. As long as the spline shaft 14 that meets the production standards maintains a stable positional relationship with the arc contact block 6 during rotation, the circular runout can be measured by the displacement sensor 8, thus expanding its applicability.

[0078] This embodiment demonstrates the adaptability of the arc contact block 6 to shaft-type workpieces with complex surface shapes.

[0079] The embodiments of this utility model are given for the purpose of illustration and description. Although embodiments of this utility model have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this utility model. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this utility model.

Claims

1. A measuring device for irregularly shaped shafts, characterized in that, The system includes a base (1), a rotating shaft mounting plate (101) fixedly connected to the top of the base (1), a rotating shaft (2) disposed on the inner side of the rotating shaft mounting plate (101), a detection main board (3) disposed on the side of the rotating shaft (2), a detection front plate (4) disposed at one end of the detection main board (3), a measuring arm plate (5) disposed on the side of the detection front plate (4), and a slot (501) provided at the end of the measuring arm plate (5) away from the detection front plate (4), with a [missing information] disposed on the inner side of the slot (501]. The arc contact block (6) has a semi-circular arc surface on its upper surface. The arc contact block (6) is rotatably connected to the measuring arm plate (5). The arc surface of the arc contact block (6) is provided with a magnet mounting hole (602). A sensor mounting seat (7) is provided on one side of the middle part of the base (1). A displacement sensor (8) is provided on the side of the sensor mounting seat (7) away from the base (1). A telescopic cylinder (11) is provided on the side of the base (1) away from the rotating shaft mounting plate (101).

2. The measuring device for irregularly shaped shafts as described in claim 1, characterized in that, The bottom surface of the detection motherboard (3) is fixedly connected to a spring support column one (301). A spring (9) is detachably connected to the bottom of the spring support column one (301). A spring support column two (1001) is detachably connected to the bottom end of the spring (9). A spring mounting seat (10) is fixedly connected to the bottom end of the spring support column two (1001). A limiting hole one (1002) is opened on the side of the spring mounting seat (10). A number of threaded holes (103) are opened on the side of the base (1) near the spring mounting seat (10). The spring mounting seat (10) is detachably connected to the base (1) through the limiting hole one (1002), the threaded holes (103) and screws.

3. The measuring device for irregularly shaped shafts as described in claim 2, characterized in that, The sensor mounting base (7) has a limiting hole (703) on its side. The sensor mounting base (7) is detachably connected to the base (1) through the limiting hole (703), the threaded hole (103) and the screw. The upper surface of the sensor mounting base (7) has a spring through hole (701). The side of the sensor mounting base (7) away from the spring through hole (701) has an elastic groove (702). The size of the elastic groove (702) is adapted to the displacement sensor (8). The side of the sensor mounting base (7) near the elastic groove (702) has a locking hole (704).

4. The measuring device for irregularly shaped shafts as described in claim 1, characterized in that, A bearing (201) is provided between the rotating shaft (2) and the rotating shaft mounting plate (101), and a bearing cover plate (202) is provided on the side of the bearing (201) away from the rotating shaft mounting plate (101).

5. The measuring device for irregularly shaped shafts as described in claim 1, characterized in that, The front detection plate (4) has mounting grooves (403) on both sides, and the main detection plate (3) has a mounting hole (302) at one end near the front detection plate (4). The mounting hole (302) is threaded with a fixing screw (402) on the side near the front detection plate (4).

6. The measuring device for an irregularly shaped shaft as described in claim 1, characterized in that, The front detection plate (4) has a second mounting hole (401) on the side near the measuring arm plate (5), and the measuring arm plate (5) has a third limiting hole (502) on the side near the second mounting hole (401). The front detection plate (4) is detachably connected to the measuring arm plate (5) through the second mounting hole (401), the third limiting hole (502) and screws.

7. The measuring device for irregularly shaped shafts as described in claim 1, characterized in that, The telescopic cylinder (11) is provided with an air connector (1101) on its side.

8. The measuring device for an irregularly shaped shaft as described in claim 1, characterized in that, The bottom end of the arc contact block (6) is provided with a mounting hole three (601), and the end of the measuring arm plate (5) near the mounting hole three (601) is provided with a mounting hole four (503). The inner side of the mounting hole three (601) is detachably connected with a hinge pin (603). The arc contact block (6) is rotatably connected to the measuring arm plate (5) through the mounting hole three (601), the mounting hole four (503) and the hinge pin (603).

9. The measuring device for an irregularly shaped shaft as described in claim 1, characterized in that, The measuring arm plate (5) has an inclined groove one (504) and an inclined groove two (505) at one end near the arc contact block (6), and the dimensions of the inclined groove one (504) and the inclined groove two (505) are adapted to the arc contact block (6).

10. The measuring device for an irregularly shaped shaft as described in claim 1, characterized in that, A magnet is installed inside the magnet mounting hole (602).

Images