Non-contact mandrel detection device

Abstract

The invention relates to a non-contact mandrel detection device, which relates to the technical field of mandrel detection and comprises a transportation device, a bearing, a first fixing seat and a related fixing piece. The first fixing base is fixed to one side of the conveying device, a fixing rod is connected to the first fixing base, and the first fixing piece is detachably connected to the fixing rod. The two second fixing pieces penetrate through the first fixing piece and are connected in a sliding mode, each second fixing piece is provided with an auxiliary piece and a visual detection piece, and the two visual detection pieces face oppositely. The conveying device is further provided with a second fixing base and an acting assembly which are located below the visual inspection part. Through cooperation of the action assembly and the visual detection member, dynamic detection of the bearing mandrel is realized.

Description

Technical Field

[0001] The present invention relates to the technical field of mandrel detection, and in particular to a non-contact mandrel detection device. Background Art

[0002] In the field of mandrel inspection, traditional inspection methods often rely on contact measuring tools, such as micrometers and vernier calipers. Although these tools can meet the measurement needs to a certain extent, they have many limitations. First, the measurement accuracy of traditional measurement methods is limited by the accuracy of the measuring tools themselves and the skill level of the operators, making it difficult to achieve high-precision and high-efficiency measurements. Secondly, for mandrels with complex shapes or minor damage on the surface, traditional measurement methods are often difficult to accurately capture, resulting in inaccurate measurement results.

[0003] In response to the above problems, non-contact measurement methods such as laser ranging have gradually emerged in the prior art. Laser ranging has overcome the limitations of contact measurement to a certain extent and improved the accuracy and efficiency of measurement. However, the laser ranging measurement method still has some shortcomings. Although the laser ranging method has high measurement accuracy, it has strict requirements on the measurement environment and is easily affected by factors such as ambient light and temperature, resulting in reduced measurement accuracy. In addition, damage on the core shaft of the bearing is difficult to detect, which has a great impact on the subsequent assembly of the bearing. Summary of the invention

[0004] In view of the technical problems existing in the prior art, the present invention provides a non-contact core shaft detection device, which detects the core shaft size of the bearing through a visual detection part. During the detection by the visual detection part, air is blown into the docking groove to drive the fan blades to rotate, the fan blades drive the rotating shaft to rotate, and the rotating shaft drives the bearing to rotate, thereby realizing dynamic detection. In addition, when the inner and outer rings of the bearing are partially oversized or undersized or damaged, the visual detection part can detect it, thereby improving the technical effect of detection accuracy.

[0005] The technical solution of the present invention to solve the above technical problems is as follows: a non-contact spindle detection device, comprising a transportation device, a bearing, a first fixed seat, a fixed rod, a first fixing member and a second fixing member; the first fixed seat is fixed to one side of the transportation device; a fixing rod is fixedly connected to the first fixed seat, and the first fixing member is detachably connected to the fixing rod; the second fixing member passes through the first fixing member and is slidably connected, there are two second fixing members, and the second fixing member also includes an auxiliary member and a visual detection member, wherein the lower end of the second fixing member is also fixedly connected to the auxiliary member, one end of the auxiliary member is fixedly connected to the visual detection member, and the two visual detection members are facing relative to each other; the transportation device also includes a second fixed seat and an action component; the second fixed seat is fixed on the transportation device, and below the two visual detection members facing relative to each other; The action assembly includes a limit seat, a limit rod and a guide member; The upper end of the second fixing seat is fixedly connected to the limiting seat; The limiting seat is also provided with a semicircular groove, the bearing is placed in the semicircular groove, and the radius of the semicircular groove is equal to the maximum radius of the bearing; The limit seat also includes an action wheel, a rotating shaft and a fan blade, the limit rod is symmetrically fixedly connected to the two ends of the semicircular groove, the lower part of the limit seat is symmetrically provided with a docking groove, and one end of the docking groove is fixedly connected to the guide member; the limit seat is also symmetrically provided with a through groove, and the upper end is connected to the semicircular groove, and the side end is connected to the docking groove, and the action wheel is rotatably connected in the through groove; the action wheel contacts the bearing through the through groove, and the function of the action wheel is to drive the bearing to rotate, so as to realize the dynamic detection of the visual detection member; The rotating shaft is coaxially fixed on the action wheel, and the rotating shaft is coaxially fixedly connected with the fan blade; An oblique hole is provided in the guide member, which faces the docking groove and is connected to the guide member, so as to enable the air blown from the external air pipe to be blown into the docking groove smoothly.

[0006] Preferably, the action component includes an auxiliary seat, a limiting rail, and a first airbag; the upper end of the second fixed seat is fixedly connected to the auxiliary seat; the length of the auxiliary seat is twice the diameter of the second fixed seat, and its function is to allow the visual detection part to detect the entire bearing when it rolls; the auxiliary seat is provided with a limiting groove, and the side ends of the limiting groove are symmetrically fixedly connected to the limiting rail; the lower part of the side end of the auxiliary seat is symmetrically provided with a first ventilation groove, and its depth is half of the length of the auxiliary seat; the upper part of the side end of the first ventilation groove is provided with a first action groove leading to the limiting groove, and its angle is 45°, and the first airbag is fixedly connected in the first action groove, and the first airbag can be pushed outward in the first action groove by inflating the first airbag, and can shrink into the first action groove when not inflated.

[0007] Preferably, a cross groove is provided on the limit rail; the limit rail also includes a roller member, a limit plate and a limit bag; the roller member is a short cylinder, and its length is equal to the length of the cross groove; cylindrical protrusions are fixedly connected to both sides of the roller member, and the cylindrical protrusions are slidably connected in the cross groove of the limit rail; one of the cylindrical protrusions is fixedly connected to the limit plate; an inflation hole is also provided on the limit plate, and the inflation hole leads to the other end of the limit plate; the other end of the limit plate is fixedly connected to the limit bag; the limit bag is connected to the roller member; the limit bag is annular, and its radius before inflation is equal to the minimum radius of the bearing, and is larger than the minimum radius of the bearing after inflation. The function of the limit bag is that the expansion of the limit bag can clamp the bearing, thereby driving the bearing to rotate, and the limit bag can effectively protect the inner ring cross section of the bearing to avoid scratches.

[0008] Preferably, the middle part of the auxiliary seat is also provided with a downward oblique section and an upward oblique section, and a smooth transition section is provided between the downward oblique section and the upward oblique section; the limiting rail is also provided with a bending section, and the angle of the bending section corresponds to the angle of the downward oblique section and the upward oblique section; the middle part of the side end of the auxiliary seat is provided with a second ventilation groove, a third ventilation groove and a fourth ventilation groove, and the depths of the second ventilation groove and the fourth ventilation groove are each one-half of the length of the auxiliary seat; the fourth ventilation groove is between the second ventilation groove and the third ventilation groove; the upper part of the side ends of the second ventilation groove, the third ventilation groove and the fourth ventilation groove are respectively provided with a second action groove, a third action groove and a fourth action groove leading to the limiting groove, and the angles are all 30°; the auxiliary seat also includes a second airbag, a third airbag and a fourth airbag; the second action groove, the third action groove and the fourth action groove are respectively fixedly connected to the second airbag, the fourth airbag and the third airbag.

[0009] The beneficial effects of the present invention are as follows: the core shaft size of the bearing can be detected by a visual detection part. During the detection by the visual detection part, air is blown into the docking groove to drive the fan blades to rotate, the fan blades drive the rotating shaft to rotate, and the rotating shaft drives the bearing to rotate, thereby realizing dynamic detection. When the core shaft of the bearing is partially oversized or undersized or damaged, it can be detected by the visual detection part, thereby achieving the technical effect of improving the detection accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 A structural schematic diagram of a non-contact mandrel detection device; Figure 2 A schematic diagram of a limit seat structure of a non-contact spindle detection device; Figure 3 A schematic diagram of the auxiliary seat structure of a non-contact spindle detection device embodiment 2; Figure 4 A schematic diagram of a first airbag structure of a non-contact mandrel detection device embodiment 2; Figure 5 A schematic diagram of a partial cross-sectional structure of an auxiliary seat of a non-contact mandrel detection device embodiment 2; Figure 6 A schematic structural diagram of a non-contact mandrel detection device embodiment 3; Figure 7 A schematic diagram of the structure of a limit plate of a non-contact spindle detection device embodiment 3; Figure 8 A structural schematic diagram of a non-contact mandrel detection device embodiment 4; Fig. 9 A structural diagram of a bending section of a non-contact mandrel detection device embodiment 4; Fig.10 A partial cross-sectional structural diagram of an auxiliary seat of a non-contact spindle detection device embodiment 4.

[0011] In the accompanying drawings, the components represented by the reference numerals are listed as follows: 100, transport device; 110, bearing; 200, first fixed seat; 210, fixed rod; 220, first fixed member; 240, second fixed member; 241, auxiliary member; 242, visual detection member; 250, second fixed seat; 260, limit seat; 2601, docking groove; 261, semicircular groove; 262, limit rod; 2611, through groove; 263, guide member; 264, action wheel; 265, rotating shaft; 2651, fan blade; 270, auxiliary seat; 2701, first ventilation groove; 2702, first action groove; 2703, second Ventilation groove; 2704, third ventilating groove; 2705, fourth ventilating groove; 2706, second action groove; 2707, third action groove; 2708, fourth action groove; 271, limiting groove; 2711, downward oblique section; 2712, upward oblique section; 272, limiting rail; 273, first airbag; 2731, second airbag; 2732, third airbag; 2733, fourth airbag; 274, bending section; 280, cross groove; 281, roller member; 2811, cylindrical protrusion; 282, limiting plate; 2821, inflation hole; 283, limiting bag. DETAILED DESCRIPTION

[0012] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of this application.

[0013] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, "plurality" means two or more, unless otherwise clearly and specifically defined.

[0014] In the description of the present application, the term "for example" is used to mean "used as an example, illustration or description". Any embodiment described as "for example" in the present application is not necessarily to be construed as being more preferred or advantageous than other embodiments. The following description is given to enable any technician in the field to implement and use the present invention. In the following description, details are listed for the purpose of explanation. It should be understood that a person of ordinary skill in the art can recognize that the present invention can be implemented without using these specific details. In other examples, well-known structures and processes will not be elaborated in detail to avoid unnecessary details to obscure the description of the present invention. Therefore, the present invention is not intended to be limited to the embodiments shown, but is consistent with the widest scope consistent with the principles and features disclosed in the present application.

[0015] Example 1 See also Figure 1 and Figure 2 , an embodiment of the present invention provides a non-contact spindle detection device, including a transport device 100, a bearing 110, a first fixing seat 200, a fixing rod 210, a first fixing member 220 and a second fixing member 240; The first fixing seat 200 is fixed to one side of the transport device 100; A fixing rod 210 is fixedly connected to the first fixing seat 200, and the first fixing member 220 is detachably connected to the fixing rod 210; The second fixing member 240 passes through the first fixing member 220 and is slidably connected. There are two second fixing members 240. The second fixing member 240 also includes an auxiliary member 241 and a visual detection member 242. The lower end of the second fixing member 240 is also fixedly connected to the auxiliary member 241. One end of the auxiliary member 241 is fixedly connected to the visual detection member 242, and the two visual detection members 242 are facing each other. The transport device 100 further includes a second fixing seat 250 and an action component; The second fixing seat 250 is fixed on the transport device 100 and is below the two visual detection members 242 facing each other; The action assembly includes a limit seat 260, a limit rod 262 and a guide member 263; The upper end of the second fixing seat 250 is fixedly connected to the limiting seat 260; The limiting seat 260 is further provided with a semicircular groove 261, the bearing 110 is placed in the semicircular groove 261, and the radius of the semicircular groove 261 is equal to the maximum radius of the bearing 110; The limit seat 260 also includes an action wheel 264, a rotating shaft 265 and a fan blade 2651. The limit rod 262 is symmetrically fixedly connected to the two ends of the semicircular groove 261. The lower part of the limit seat 260 is symmetrically provided with a docking groove 2601, and one end of the docking groove 2601 is fixedly connected to the guide member 263; the limit seat 260 is also symmetrically provided with a through groove 2611, and the upper end is connected to the semicircular groove 261, and the side end is connected to the docking groove 2601, and the action wheel 264 is rotatably connected in the through groove 2611; the action wheel 264 contacts the bearing 110 through the through groove 2611, and the function of the action wheel 264 is to drive the bearing 110 to rotate, so as to realize the dynamic detection of the visual detection member 242; The rotating shaft 265 is coaxially fixed on the action wheel 264, and the rotating shaft 265 is coaxially fixedly connected with the fan blade 2651; The guide member 263 has an oblique hole therein, which faces and is connected to the docking groove 2601 , so as to allow the air blown from the external air pipe to be blown into the docking groove 2601 smoothly.

[0016] Specific implementation: the core shaft to be inspected is placed on the bearing 110 of the transport device 100 so that it is aligned with the docking groove 2601 and the semicircular groove 261 of the limit seat 260, and the guide member 263 in the limit seat 260 is inflated through an external air pipe (the external air pipe is a prior art and will not be described in detail here). The airflow acts on the fan blade 2651 through the guide member 263, driving the action wheel 264 and the rotating shaft 265 to rotate, thereby driving the bearing 110 to rotate. The visual inspection member 242 captures the image information of the core shaft during the rotation of the bearing 110, and analyzes the image through an image processing algorithm to detect the size of the core shaft and the dimensional surface damage.

[0017] Example 2 Since the bearing 110 to be detected is heavy, when the action wheel 264 contacts and rotates it, it may not rotate or rotate intermittently, so the dynamic detection method is improved; See also Figures 3 to 5 The embodiment of the present invention provides a non-contact spindle detection device, wherein the function component includes an auxiliary seat 270, a limit rail 272, and a first airbag 273; the upper end of the second fixed seat 250 is fixedly connected to the auxiliary seat 270; the length of the auxiliary seat 270 is twice the diameter of the second fixed seat 250, and the function is to allow the bearing 110 to roll fully, so that the visual detection member 242 can detect fully; The auxiliary seat 270 is provided with a limiting groove 271, and the side ends of the limiting groove 271 are symmetrically fixedly connected to the limiting rail 272 and do not contact the bearing 110; The lower part of the side end of the auxiliary seat 270 is symmetrically provided with a first ventilation groove 2701, the depth of which is half of the length of the auxiliary seat 270; A first action groove 2702 leading to the limiting groove 271 is formed at the upper side end of the first ventilation groove 2701, and the angle thereof is 45°. A first airbag 273 is fixedly connected in the first action groove 2702, and the first airbag 273 can be pushed outward in the first action groove 2702 by inflating the first airbag 273, and can be retracted into the first action groove 2702 when not inflated.

[0018] The technical solutions in the above embodiments of the present application have at least the following technical effects or advantages: Air is blown into the first ventilation groove 2701 through an external air pipe, so that the first airbag 273 expands and pushes against the bearing 110. The bearing 110 rolls in the limiting groove 271 of the auxiliary seat 270. The visual inspection part 242 conducts a comprehensive inspection on it during rolling, thereby improving the inspection accuracy; this effectively solves the problem of intermittent dynamic visual inspection of the bearing 110 during inspection.

[0019] Example 3 Since the bearing 110 is rolling, the rolling direction will be biased, causing it to hit the limit rail 272, thereby affecting the subsequent dynamic detection work, so the limit rail 272 and the auxiliary seat 270 are improved; See also Figure 6 and Figure 7 The embodiment of the present invention provides a non-contact spindle detection device, wherein a cross groove 280 is formed on the limit rail 272; the limit rail 272 further comprises a roller member 281, a limit plate 282 and a limit capsule 283; the roller member 281 is a short cylindrical shape, and its length is equal to that of the cross groove 280; cylindrical protrusions 2811 are fixedly connected on both sides of the roller member 281, and the cylindrical protrusions 2811 are slidably connected in the cross groove 280 of the limit rail 272; One of the cylindrical protrusions 2811 is fixedly connected to the limiting plate 282; the limiting plate 282 is also provided with an air filling hole 2821, and the air filling hole 2821 leads to the other end of the limiting plate 282; The other end of the limiting plate 282 is fixedly connected to the limiting capsule 283; the limiting capsule 283 is in communication with the roller member 281; The limiting bag 283 is annular, and its radius before inflation is equal to the minimum radius of the bearing 110, and after inflation, it is larger than the minimum radius of the bearing 110. The function of the limiting bag 283 is to clamp the bearing 110 when it expands, thereby driving the bearing 110 to rotate; the limiting bag 283 can effectively protect the inner ring section of the bearing 110 to prevent scratches.

[0020] The technical solutions in the above embodiments of the present application have at least the following technical effects or advantages: By inflating the limit bag 283 and clamping the bearing 110, the external air pipe blows air into the first ventilation groove 2701, so that the first air bag 273 expands and pushes against the bearing 110. Under the action of the roller part 281, the bearing 110 rolls in the direction of the limit rail 272, thereby ensuring the technical effect that the visual inspection part 242 can smoothly perform dynamic inspection of the bearing 110; it effectively solves the technical problem that the rolling direction of the bearing 110 deflects and affects the subsequent dynamic inspection work.

[0021] Example 4 In order to improve the accuracy of dynamic detection, a combination of dynamic and static is added to the dynamic detection, so the auxiliary seat 270 and the limit rail 272 are further improved; See also Figures 8 to 10 , the embodiment of the present invention provides a non-contact spindle detection device, the middle part of the auxiliary seat 270 is also provided with a downward oblique section 2711 and an upward oblique section 2712, and a smooth transition section is provided between the downward oblique section 2711 and the upward oblique section 2712; The limiting rail 272 is further provided with a bending section 274, and the bending section 274 corresponds to the angle of the downward oblique section 2711 and the upward oblique section 2712; The auxiliary seat 270 is provided with a second ventilation groove 2703, a third ventilation groove 2704 and a fourth ventilation groove 2705 in the middle of the side end, and the depths of the second ventilation groove 2703, the third ventilation groove 2704 and the fourth ventilation groove 2705 are all one-half of the length of the auxiliary seat 270; The fourth ventilation groove 2705 is between the second ventilation groove 2703 and the third ventilation groove 2704; the second ventilation groove 2703, the third ventilation groove 2704, and the fourth ventilation groove 2705 are respectively provided with a second action groove 2706, a third action groove 2707, and a fourth action groove 2708 leading to the limiting groove 271 at the upper part of the side ends thereof, and the angles thereof are all 30°; The auxiliary seat 270 also includes a second airbag 2731, a third airbag 2732 and a fourth airbag 2733; The second action groove 2706 , the third action groove 2707 , and the fourth action groove 2708 are fixedly connected with the second airbag 2731 , the fourth airbag 2733 , and the third airbag 2732 , respectively.

[0022] The technical solutions in the above embodiments of the present application have at least the following technical effects or advantages: When the bearing 110 rolls, the bearing 110 is limited by the oblique downward section 2711 and the oblique upward section 2712, and the visual inspection component 242 performs two rounds of static inspection on the bearing 110, each round lasting 1 to 2 minutes, and the bearing 110 is lifted up and rolled by the second airbag 2731, the fourth airbag 2733, and the third airbag 2732 respectively; the technical effect of the visual inspection component 242 detecting the dynamic and static combined state of the bearing 110 is achieved.

[0023] Working process: Step 1: Place the bearing 110 into the limiting groove 271 of the auxiliary seat 270 and close to the oblique downward section 2711; Step 2: Slide the roller member 281 to the center of the bearing 110, and inflate the limiting bag 283. At this time, the limiting bag 283 expands and clamps on the cross section of the inner ring of the bearing 110; Step 3: Blow air into the first ventilation groove 2701 through an external air pipe, so that the first airbag 273 expands and pushes toward the bearing 110, and the bearing 110 rolls along the track of the limiting rail 272 under the action of the roller member 281; Step 4: When the bearing 110 stops at the oblique downward section 2711, wait for 1 to 2 minutes. After a round of static inspection by the visual inspection member 242 is completed, the external air pipe blows air into the second ventilation groove 2703, so that the second air bag 2731 expands and lifts the bearing 110 to enter the smooth transition section; Step 5: After the bearing 110 is on the smooth transition section, air is blown into the fourth ventilation groove 2705 through an external air pipe, so that the bearing 110 passes through the oblique upward section 2712, and stops after passing through the oblique upward section 2712, and a second round of static testing is performed; Step six: After the second round of static testing is completed for 1 to 2 minutes, the third ventilation groove 2704 is blown through an external air pipe to expand the third airbag 2732 to lift the bearing 110. When the bearing 110 slides downward, the external air pipe blows air into the first ventilation groove 2701 at the end to expand the first airbag 273, which serves to cushion the bearing 110 when it slides down to the end.

[0024] It should be noted that in the above embodiments, the description of each embodiment has its own emphasis, and for parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0025] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A non-contact spindle detection device, characterized in that: It comprises a transport device (100), a bearing (110), a first fixing seat (200), a fixing rod (210), a first fixing member (220) and a second fixing member (240); The first fixing seat (200) is fixed to one side of the transport device (100); A fixing rod (210) is fixedly connected to the first fixing seat (200), and the first fixing member (220) is detachably connected to the fixing rod (210); The second fixing member (240) passes through the first fixing member (220) and is slidably connected thereto, there are two second fixing members (240), and the second fixing members (240) further include an auxiliary member (241) and a visual detection member (242), wherein the lower end of the second fixing member (240) is also fixedly connected to the auxiliary member (241), one end of the auxiliary member (241) is fixedly connected to the visual detection member (242), and the two visual detection members (242) are facing each other; The transport device (100) further comprises a second fixing seat (250) and an action component, wherein the second fixing seat (250) is fixed on the transport device (100) and is located below the two visual detection components (242) facing each other.

2. A non-contact spindle detection device as claimed in claim 1, characterized in that: The action component comprises a limit seat (260), a limit rod (262) and a guide member (263); The upper end of the second fixing seat (250) is fixedly connected to the limiting seat (260); The limiting seat (260) is further provided with a semicircular groove (261), the bearing (110) is placed in the semicircular groove (261), and the radius of the semicircular groove (261) is equal to the maximum radius of the bearing (110).

3. A non-contact spindle detection device as claimed in claim 2, characterized in that: The limiting seat (260) further comprises an action wheel (264), a rotating shaft (265) and a fan blade (2651); the limiting rod (262) is symmetrically fixedly connected to the two ends of the semicircular groove (261); the lower part of the limiting seat (260) is symmetrically provided with a docking groove (2601), and one end of the docking groove (2601) is fixedly connected to the guide member (263); the limiting seat (260) is also symmetrically provided with a through groove (2611), and the upper end is communicated with the semicircular groove (261), and the side end is communicated with the docking groove (2601); The action wheel (264) is rotatably connected in the through slot (2611), and the action wheel (264) is in contact with the bearing (110) through the through slot (2611); The rotating shaft (265) is coaxially fixed to the action wheel (264), and the rotating shaft (265) is coaxially fixedly connected to the fan blade (2651); An oblique hole is formed in the guide member (263), which faces the docking groove (2601) and is in communication with the docking groove (2601).

4. A non-contact spindle detection device as claimed in claim 1, characterized in that: The action assembly comprises an auxiliary seat (270), a limiting rail (272), and a first airbag (273); the upper end of the second fixing seat (250) is fixedly connected to the auxiliary seat (270); The length of the auxiliary seat (270) is twice the diameter of the second fixed seat (250); a limiting groove (271) is provided on the auxiliary seat (270), and the side ends of the limiting groove (271) are symmetrically fixedly connected to the limiting rail (272); and a first ventilation groove (2701) is symmetrically provided at the lower part of the side end of the auxiliary seat (270), and the depth of the first ventilation groove is half the length of the auxiliary seat (270).

5. A non-contact spindle detection device as claimed in claim 4, characterized in that: A first action groove (2702) leading to the limiting groove (271) is formed at the upper part of the side end of the first ventilation groove (2701), and the angle thereof is 45°; A first airbag (273) is fixedly connected in the first action groove (2702). The first airbag (273) can be pushed outward from the first action groove (2702) by inflating the first airbag (273), and can be retracted into the first action groove (2702) when not inflated.

6. A non-contact mandrel detection device as claimed in claim 5, characterized in that: The limiting rail (272) is provided with a cross groove (280); the limiting rail (272) further comprises a roller member (281), a limiting plate (282) and a limiting capsule (283); The roller member (281) is in the shape of a short cylinder, and its length is equal to the length of the cross groove (280); cylindrical protrusions (2811) are fixedly connected to both sides of the roller member (281).

7. A non-contact spindle detection device as claimed in claim 6, characterized in that: The cylindrical protrusion (2811) is slidably connected in the cross groove (280) of the limiting rail (272); one of the cylindrical protrusions (2811) is fixedly connected to the limiting disk (282); the limiting disk (282) is also provided with an inflation hole (2821), and the inflation hole (2821) leads to the other end of the limiting disk (282).

8. A non-contact spindle detection device as claimed in claim 7, characterized in that: The other end of the limiting plate (282) is fixedly connected to the limiting capsule (283); the limiting capsule (283) is in communication with the roller member (281); The limiting bag (283) is annular, and its radius before inflation is equal to the minimum radius of the bearing (110), and after inflation is larger than the minimum radius of the bearing (110).

9. A non-contact spindle detection device as claimed in claim 8, characterized in that: The middle portion of the auxiliary seat (270) is further provided with a downwardly inclined section (2711) and an upwardly inclined section (2712), and a smooth transition section is provided between the downwardly inclined section (2711) and the upwardly inclined section (2712); The limiting rail (272) is also provided with a bending section (274), and the bending section (274) corresponds to the angle of the downwardly inclined section (2711) and the upwardly inclined section (2712).

10. A non-contact spindle detection device as claimed in claim 9, characterized in that: A second ventilation groove (2703), a third ventilation groove (2704) and a fourth ventilation groove (2705) are provided in the middle of the side end of the auxiliary seat (270), and the depth of each of the second ventilation grooves is half of the length of the auxiliary seat (270); The fourth ventilation groove (2705) is between the second ventilation groove (2703) and the third ventilation groove (2704); the second ventilation groove (2703), the third ventilation groove (2704) and the fourth ventilation groove (2705) are respectively provided with a second action groove (2706), a third action groove (2707) and a fourth action groove (2708) leading to the limiting groove (271) at the upper part of the side ends thereof, and the angles of the second ventilation groove (2703), the third ventilation groove (2704) and the fourth ventilation groove (2705) are all 30°; The auxiliary seat (270) further comprises a second airbag (2731), a third airbag (2732) and a fourth airbag (2733); the second action groove (2706), the third action groove (2707) and the fourth action groove (2708) are respectively fixedly connected to the second airbag (2731), the fourth airbag (2733) and the third airbag (2732).

Images