Sleeve part shaft hole defect detection device

Abstract

The application discloses a sleeve part shaft hole defect detection device, which comprises a rack, a first lifting cylinder arranged at the top of the rack, a rotary driving mechanism connected to the bottom of the first lifting cylinder, a plurality of detection mechanisms arranged in a ring array and connected to the rotary driving mechanism, wherein the rotary driving mechanism is used for driving the plurality of detection mechanisms to simultaneously rotate, each detection mechanism comprises a rotating shaft connected to the rotary driving mechanism, a plurality of guide cylinders arranged in a ring array and connected to the bottom of the rotating shaft, wherein the axial direction of the guide cylinder is perpendicular to the axial direction of the rotating shaft, a pressure sensor, a first spring, a sliding block and a probe are sequentially arranged in the guide cylinder, the probe extends out of the guide cylinder and away from one side of the rotating shaft, and the probe is used for contacting the inner wall of a sleeve to be detected, and the application has the advantages that the detection efficiency and the detection accuracy can be considered.

Description

Technical Field

[0001] This application relates to the field of component defect detection technology, and in particular to a device for detecting defects in the shaft hole of a sleeve component. Background Technology

[0002] Metal sleeve parts have shaft holes that mate with shaft parts. For high-precision assembly requirements, higher process requirements are placed on the internal shaft holes of metal sleeve parts. Some forming processes (such as casting) may cause local deformation of the internal shaft holes, forming pits or protrusions, which affect the assembly or the fitting accuracy after assembly. Therefore, it is necessary to detect the deformation of the internal shaft holes of metal sleeve parts after forming. However, the existing detection devices for local deformation of the internal shaft holes of metal sleeve parts are generally handheld simple detection fixtures, which are not only inefficient but also difficult to guarantee detection accuracy. Summary of the Invention

[0003] The main purpose of this application is to provide a device for detecting defects in the shaft hole of sleeve parts, which aims to solve the technical problem that existing devices for detecting local deformation of the internal shaft hole of metal sleeve parts cannot simultaneously guarantee detection efficiency and detection accuracy.

[0004] To achieve the above objectives, this application provides a device for detecting defects in the shaft hole of a sleeve part, including a frame, a first lifting cylinder at the top of the frame, a rotary drive mechanism connected to the bottom of the first lifting cylinder, a plurality of detection mechanisms arranged in a circular array connected to the rotary drive mechanism, the rotary drive mechanism being used to drive the plurality of detection mechanisms to rotate simultaneously, each detection mechanism including a rotating shaft connected to the rotary drive mechanism, a plurality of guide cylinders arranged in a circular array connected to the bottom of the rotating shaft, the axial direction of the guide cylinders being perpendicular to the axial direction of the rotating shaft, a pressure sensor, a first spring, a slider and a probe being arranged sequentially inside the guide cylinders, the probes extending out of the guide cylinders away from the rotating shaft, the probes being used to contact the inner wall of the sleeve to be tested.

[0005] Optionally, the rotary drive mechanism includes a control box connected to the bottom of the first lifting cylinder, a first motor provided on the top of the control box, a drive gear connected to the first motor located inside the control box, the drive gear meshing with multiple driven gears connected to the top of the corresponding rotating shaft, and a bearing sleeve cooperating with the corresponding rotating shaft provided on the bottom of the control box.

[0006] Optionally, the outer wall of the rotating shaft is provided with a threaded section, and a positioning sleeve is threaded on the threaded section. The bottom of the positioning sleeve is flared, and the bottom inner wall of the positioning sleeve is used to compress the probe to the initial position inside the guide cylinder. The maximum outer diameter of the positioning sleeve is smaller than the inner diameter of the sleeve to be tested. Multiple arc-shaped plates arranged in a ring array are hinged to the bottom outer side of the positioning sleeve. A second spring is connected between the inner wall of the arc-shaped plate and the outer wall of the positioning sleeve.

[0007] Optionally, a limit rod is provided at the bottom of the control box. The limit rod moves through the positioning sleeve. The section of the outer wall of the rotating shaft between the threaded section and the bottom of the control box is a smooth section. The smooth section is in movable fit with the positioning sleeve.

[0008] Optionally, a thrust mechanism is provided at the bottom of the control box, which is used to apply thrust to the top of the positioning sleeve located in the smooth section.

[0009] Optionally, the thrust mechanism includes a second lifting cylinder located at the bottom of the control box. A push plate is connected to the bottom of the second lifting cylinder. The push plate is movably sleeved on the smooth section of all rotating shafts and is used to contact the top of the positioning sleeve.

[0010] Optionally, the rotating shaft is a hollow shaft, and a reset mechanism is provided inside the hollow shaft. The reset mechanism is used to drive all the sliders to slide and reset towards the hollow shaft.

[0011] Optionally, the reset mechanism includes a second motor disposed inside the hollow shaft. The second motor is connected to a take-up and release wheel. Multiple pull wires are wound on the take-up and release wheel. The pull wires movably pass through the side wall of the hollow shaft and extend into the corresponding guide cylinders to connect to one end of the slider.

[0012] Optionally, a testing platform is provided at the bottom of the frame, and multiple receiving slots are provided on the top of the testing platform for placing the sleeves to be tested. An electromagnet covering the area of ​​all receiving slots is provided inside the testing platform, and the electromagnet is used to attract the sleeves to be tested.

[0013] Optionally, a third motor is installed at the bottom of the frame, and a turntable is connected to the top of the third motor. Multiple testing stations are arranged in a circular array around the center of the turntable, and any one of the testing stations can be rotated to be directly below the testing mechanism.

[0014] The beneficial effects that this application can achieve are as follows: This application includes a frame, with a first lifting cylinder at the top of the frame and a rotary drive mechanism connected to the bottom of the first lifting cylinder. The rotary drive mechanism is connected to multiple detection mechanisms arranged in a circular array. The rotary drive mechanism is used to drive the multiple detection mechanisms to rotate simultaneously. Each detection mechanism includes a rotating shaft connected to the rotary drive mechanism. Multiple guide cylinders arranged in a circular array are connected to the bottom of the rotating shaft. The axial direction of the guide cylinders is perpendicular to the axial direction of the rotating shaft. A pressure sensor, a first spring, a slider, and a probe are arranged sequentially inside the guide cylinder. The probe extends out of the guide cylinder to the side away from the rotating shaft and is used to contact the inner wall of the sleeve to be tested. Based on the structure of this application, during testing, multiple detection mechanisms are simultaneously inserted into the inner walls of different sleeves to be tested. Then, under the action of a rotary drive mechanism, these multiple detection mechanisms rotate simultaneously. Simultaneously, a first lifting cylinder drives the rotary drive mechanism and all detection mechanisms downwards. This causes probes in multiple guide cylinders at the bottom of the rotating shaft to slowly rotate and move downwards along the inner walls of different positions on the sleeves to be tested. When a pit or protrusion exists at a certain position on the inner wall of the sleeve to be tested, the probe extends or retracts from the guide cylinder under the action of a first spring, and the slider slides accordingly. The extension and retraction of the first spring causes a corresponding change in the pressure data collected by the pressure sensor, thereby indirectly detecting whether local deformation has occurred on the inner wall of the shaft hole of the sleeve to be tested. In summary, this application utilizes pressure sensing between the probe and the deformation location to detect deformation. The probe has a fine needle structure, which can effectively capture minute deformations, improving detection accuracy. Simultaneous detection by multiple probes improves the coverage of the detection area on the inner wall of the shaft hole, and multiple detection mechanisms can detect multiple sleeves at once, further improving detection efficiency. Thus, it achieves a balance between detection accuracy and efficiency. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0016] Figure 1 This is a schematic diagram of the structure of the sleeve part shaft hole defect detection device in the embodiments of this application; Figure 2 This is a schematic diagram of the internal structure of the detection mechanism in an embodiment of this application; Figure 3 This is a schematic diagram of the structure of the detection mechanism in an embodiment of this application when the probe just comes into contact with the inner wall of the sleeve to be tested; Figure 4 This is a schematic diagram of the structure of the probe in the detection mechanism in an embodiment of this application, when it slides down the inner wall of the sleeve to be tested to the bottom.

[0017] Figure label: 110-Frame, 120-First lifting cylinder, 130-Rotary drive mechanism, 131-Control box, 132-First motor, 133-Driving gear, 134-Driven gear, 140-Detection mechanism, 141-Rotating shaft, 1411-Threaded section, 142-Guide cylinder, 143-Pressure sensor, 144-First spring, 145-Slider, 146-Probe, 150-Positioning sleeve, 151-Arc plate, 152-Second spring, 160-Limit rod, 170-Thrust mechanism, 171-Second lifting cylinder, 172-Push plate, 180-Reset mechanism, 181-Second motor, 182-Retracting wheel, 183-Pull wire, 190-Detection table, 191-Receiving slot, 210-Electromagnet, 220-Third motor, 230-Turntable, 240-Sleeve to be tested.

[0018] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0019] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0020] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationship and movement of each component in a specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0021] In this application, unless otherwise expressly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral part; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0022] Furthermore, if the embodiments of this application involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0023] Example Reference Figures 1-4 This embodiment provides a device for detecting defects in the shaft hole of a sleeve part, including a frame 110. A first lifting cylinder 120 is provided on the top of the frame 110. A rotary drive mechanism 130 is connected to the bottom of the first lifting cylinder 120. The rotary drive mechanism 130 is connected to a plurality of detection mechanisms 140 arranged in a ring array. The rotary drive mechanism 130 is used to drive the plurality of detection mechanisms 140 to rotate simultaneously. The detection mechanism 140 includes a rotating shaft 141 connected to the rotary drive mechanism 130. A plurality of guide cylinders 142 arranged in a ring array are connected to the bottom of the rotating shaft 141. The axial direction of the guide cylinders 142 is perpendicular to the axial direction of the rotating shaft 141. A pressure sensor 143, a first spring 144, a slider 145 and a probe 146 are arranged in sequence inside the guide cylinder 142. The probe 146 extends out of the guide cylinder 142 away from the rotating shaft 141 and is used to contact the inner wall of the sleeve 240 to be tested.

[0024] In this embodiment, during testing, multiple testing mechanisms 140 are simultaneously inserted into the inner walls of different sleeves 240 to be tested. Then, under the action of the rotary drive mechanism 130, the multiple testing mechanisms 140 are driven to rotate simultaneously. At the same time, the first lifting cylinder 120 drives the rotary drive mechanism 130 and all testing mechanisms 140 to move downward, so that the probes 146 in the multiple guide cylinders 142 at the bottom of the rotating shaft 141 slowly rotate and move downward along the inner wall of different positions of the sleeve 240 to be tested. When there is a pit or protrusion at a certain position on the inner wall of the sleeve 240 to be tested, the probe 146 is extended or retracted from the guide cylinder 142 under the action of the first spring 144, and the slider 145 slides accordingly. When the first spring 144 extends and retracts, the pressure data collected by the pressure sensor 143 changes accordingly, thereby indirectly detecting whether the inner wall of the shaft hole of the sleeve 240 to be tested has undergone local deformation. In summary, this embodiment utilizes pressure sensing between probe 146 and the deformation location to detect deformation. Probe 146 has a fine needle structure, which can effectively capture minute deformations and improve detection accuracy. At the same time, simultaneous detection by multiple probes 146 can improve the coverage of the detection area on the inner wall of the shaft hole. Furthermore, multiple detection mechanisms 140 can detect multiple sleeves at once, which improves detection efficiency. Thus, the goal of balancing detection accuracy and efficiency is achieved.

[0025] It should be noted that there are two control methods for the first lifting cylinder 120 to drive the rotary drive mechanism 130 and all detection mechanisms 140 to move downward: The first method is that the first lifting cylinder 120 drives the detection mechanism 140 to move downward continuously and at a constant speed. At this time, the movement path of a single probe 146 on the inner wall of the shaft hole of the sleeve to be tested is spiral. Multiple probes 146 form multiple spiral movement paths, which can basically cover the inner wall of the shaft hole. The second method is that the first lifting cylinder 120 drives the detection mechanism 140 to move downward intermittently at certain intervals. The interval is the time it takes for multiple probes 146 to make one circle along the movement path of the inner wall of the shaft hole. Taking four probes 146 as an example, the interval is the time it takes for a single probe 146 to move along the inner wall of the shaft hole for one-quarter of the time. This allows the movement paths of multiple probes 146 to cover the inner wall of the shaft hole.

[0026] As an optional implementation, the rotary drive mechanism 130 includes a control box 131 connected to the bottom of the first lifting cylinder 120. A first motor 132 is provided on the top of the control box 131. The first motor 132 is connected to a drive gear 133 located inside the control box 131. The drive gear 133 meshes with a plurality of driven gears 134 connected to the top of the corresponding rotating shaft 141. A bearing sleeve that cooperates with the corresponding rotating shaft 141 is provided at the bottom of the control box 131. The bearing sleeve serves to both rotate and support the rotating shaft 141.

[0027] In this embodiment, the first motor 132 drives the driving gear 133 and the driven gear 134 to rotate synchronously, thereby driving all rotating shafts 141 to rotate synchronously, realizing automatic rotation operation of all detection mechanisms 140. Here, the first motor 132 can be a servo motor, which can precisely control the speed to meet the usage requirements.

[0028] As an optional implementation, the outer wall of the rotating shaft 141 is provided with a threaded section 1411, and a positioning sleeve 150 is threadedly fitted on the threaded section 1411. The bottom of the positioning sleeve 150 is flared, and the bottom inner wall of the positioning sleeve 150 is used to compress the probe 146 to the initial position inside the guide cylinder 142. The maximum outer diameter of the positioning sleeve 150 is smaller than the inner diameter of the sleeve 240 to be tested. Multiple arc-shaped plates 151 arranged in a ring array are hinged to the bottom outer side of the positioning sleeve 150. A second spring 152 is connected between the inner wall of the arc-shaped plate 151 and the outer wall of the positioning sleeve 150.

[0029] In this embodiment, since the probe 146 needs to exert a certain pressure on the first spring 144 when it contacts the inner wall of the shaft hole of the sleeve 240 to be tested, when the probe 146 is in a free state without contact, that is, when multiple probes 146 freely extend out of the guide tube 142, the diameter of the circle formed by the ends of the multiple probes 146 is larger than the inner diameter of the shaft hole. At the same time, in order to be applicable to the testing of sleeves with different inner diameters and to accurately position the sleeve so that the axis of the sleeve 240 to be tested coincides with the axis of the rotating shaft 141, when the probe 146 enters the inside of the sleeve 240 to be tested, all probes 146 need to be retracted to the initial position inside the guide tube 142 (i.e., the ends of the probes 146). (There is a significant gap between the probe and the inner wall of the sleeve). Therefore, in this embodiment, a positioning sleeve 150 threaded on the rotating shaft 141 is set to compress all probes 146 to the initial position inside the guide cylinder 142. At the same time, the positioning sleeve 150 can rotate and move downward along the threaded section 1411, so that multiple arc plates 151 extend into the lower coarse sleeve 240 to be tested. Under the action of the second spring 152, the arc plates 151 press against the sleeve 240 to be tested, thereby causing the sleeve 240 to be tested to be aligned. Then, the positioning sleeve 150 is rotated and moved upward to a higher position on the rotating shaft 141. At this time, the probes 146 are also released and extended to abut against the inner wall of the sleeve 240 to be tested, and the subsequent testing work can be carried out. In summary, this embodiment, through the cooperation of the positioning sleeve 150, the second spring 152, and the arc plate 151, can simultaneously achieve the retraction of the probe 146 and the accurate positioning of the sleeve, thereby ensuring detection accuracy. It can be applied to the detection of sleeves with different shaft hole specifications, taking into account versatility, detection accuracy, and efficiency.

[0030] As an optional implementation, a limit rod 160 is provided at the bottom of the control box 131. The limit rod 160 movably passes through the positioning sleeve 150. The section of the outer wall of the rotating shaft 141 between the threaded section 1411 and the bottom of the control box 131 is a smooth section, which is movably engaged with the positioning sleeve 150.

[0031] In this embodiment, since the rotating shaft 141 is rotatable, the screw drive principle can be used to move the positioning sleeve 150 upward to release all probes 146. By making all rotating shafts 141 rotate, the positioning sleeve 150 cannot rotate under the limiting action of the limiting rod 160, thus moving upward in a straight line along the threaded section 1411, realizing the automatic operation of releasing probes 146 from all positioning sleeves 150 without manual operation, further improving the operation efficiency. When the positioning sleeve 150 moves upward to the smooth section, it loses the thread drive effect and stops moving upward. At this time, while maintaining the rotation of the rotating shaft 141, the first lifting cylinder 120 drives the rotating shaft 141 and all probes 146 to move downward as a whole to start the detection work.

[0032] As an optional implementation, a thrust mechanism 170 is provided at the bottom of the control box 131, which is used to apply thrust to the top of the positioning sleeve 150 located in the smooth section.

[0033] In this embodiment, after the test is completed, the positioning sleeve 150 needs to be moved down to the position where all probes 146 are retracted to prepare for the next test. At this time, the thrust mechanism 170 can apply a thrust to the top of the positioning sleeve 150 located in the smooth section, causing the positioning sleeve 150 to engage with the threaded section 1411. Then, under the reverse action of the rotating shaft 141 (achieved by the reverse action of the first motor 132), the positioning sleeve 150 is moved down in a straight line along the threaded section 1411, realizing the automatic reset of the positioning sleeve 150. No manual operation is required, and the degree of automation is high.

[0034] It should be noted that when the positioning sleeve 150 is reset, the probe 146 is located inside the sleeve 240 to be tested, that is, the probe 146 is in a certain retracted state, and the outer end of the probe 146 is a ball head structure. When the positioning sleeve 150 moves down to contact the ball head end of the probe 146 (the inner wall of the bottom of the positioning sleeve 150 can be designed with rounded corners to make smooth contact with the ball head end), the probe 146 can be caused to retract into the guide cylinder 142, thereby realizing the automatic retraction of the probe 146. After retraction, the first lifting cylinder 120 drives the detection mechanism 140 to move up to the initial position, preparing for the detection work of the next batch of sleeves 240 to be tested.

[0035] As an optional implementation, the thrust mechanism 170 includes a second lifting cylinder 171 disposed at the bottom of the control box 131. A push plate 172 is connected to the bottom of the second lifting cylinder 171. The push plate 172 is movably sleeved on the smooth section of all rotating shafts 141 and is used to contact the top of the positioning sleeve 150.

[0036] In this embodiment, the second lifting cylinder 171 drives the push plate 172 to move downward, thereby applying a downward thrust to all the positioning sleeves 150 simultaneously through the push plate 172, so as to cause all the positioning sleeves 150 to automatically engage the threaded section 1411.

[0037] As an optional implementation, the rotating shaft 141 is a hollow shaft, and a reset mechanism 180 is provided inside the hollow shaft. The reset mechanism 180 is used to drive all the sliders 145 to slide and reset towards the hollow shaft.

[0038] In this embodiment, considering that when the inner diameter of the sleeve 240 to be tested is large, the probe 146 also extends for a relatively long length. It is difficult to rely solely on the contact between the positioning sleeve 150 and the ball end of the probe 146 to cause the probe 146 to retract, and there is a risk of the probe 146 breaking. In this case, the reset mechanism 180 inside the hollow rotating shaft 141 can drive all the sliders 145 to slide towards the center, thereby causing all the probes 146 to actively retract towards the guide cylinder 142. At this time, after the positioning sleeve 150 moves down, it can smoothly fit on the outside of all the probes 146. Then, the probes 146 are released by the reset mechanism 180, and the probes 146 press against the inner wall of the positioning sleeve 150, thereby realizing the automatic retraction of the probes 146 inside the positioning sleeve 150. This reduces the risk of damage to the probes 146 during the retraction process after testing the sleeve 240 with a large inner diameter. Therefore, it can be effectively applied to the testing of the sleeve 240 with a large inner diameter, further improving its versatility.

[0039] As an optional implementation, the reset mechanism 180 includes a second motor 181 disposed inside the hollow shaft. The second motor 181 is connected to a take-up and release wheel 182. Multiple pull wires 183 are wound around the take-up and release wheel 182. The pull wires 183 movably pass through the side wall of the hollow shaft and extend into the corresponding guide cylinder 142 to connect to one end of the slider 145.

[0040] In this embodiment, when a reset operation is required, the second motor 181 drives the take-up and release wheel 182 to rotate, thereby pulling all the pull wires 183 to simultaneously wind around the take-up and release wheel 182, which in turn drives the corresponding slider 145 to slide towards the center. Similarly, by reversing the second motor 181, the pulling force of the pull wires 183 on the slider 145 is released, and the slider 145, under the action of the first spring 144, drives the probe 146 to slide outward of the guide cylinder 142, realizing the automatic take-up and release of the probe 146. The structure is ingeniously designed, the operation is automated, and no manual operation is required.

[0041] It should be noted that the pull wire 183 is connected to the center of the side end of the slider 145, and moves through the guide cylinder 142 and the hollow shaft side wall, or passes through the gap between the pressure sensor 143 and the inner wall of the guide cylinder 142 and then moves through the hollow shaft side wall, and finally winds around the take-up and release wheel 182. The pull wire 183 does not interfere with the first spring 144 and does not affect the movement of the pull wire 183.

[0042] As an optional implementation, a testing platform 190 is provided at the bottom of the frame 110. The top of the testing platform 190 is provided with multiple receiving slots 191 for placing the sleeve 240 to be tested. An electromagnet 210 covering the area of ​​all receiving slots 191 is provided inside the testing platform 190. The electromagnet 210 is used to attract the sleeve 240 to be tested.

[0043] In this embodiment, since the sleeve to be tested 240 is generally made of metal, after the sleeve to be tested 240 is positioned, the electromagnet 210 is used to magnetically attract and securely fix the sleeve to be tested 240, thereby reducing the positional displacement of the sleeve to be tested 240 caused by vibration and other factors during the testing process, thus ensuring the testing accuracy.

[0044] In other embodiments, if the sleeve 240 to be tested has a closed bottom structure, a negative pressure adsorption mechanism can be used instead of the electromagnet 210 to adsorb and fix the sleeve 240 to be tested.

[0045] As an optional implementation, a third motor 220 is provided at the bottom of the frame 110, and a turntable 230 is connected to the top of the third motor 220. Multiple detection stations 190 arranged in a circular array are arranged around the center of the turntable 230. Any detection station 190 can be rotated to be directly below the detection mechanism 140.

[0046] In this embodiment, after multiple sleeves on the testing platform 190 have been tested, the third motor 220 drives the turntable 230 to rotate by a preset angle, so that multiple sleeves 240 to be tested on another testing platform 190 rotate to a position below the testing mechanism 140 to start the testing work. At the same time, the tested sleeves can be automatically sorted into qualified and unqualified areas by a multi-degree-of-freedom robotic arm (not shown in the figure). After sorting, the next batch of sleeves 240 to be tested can also be loaded by the multi-degree-of-freedom robotic arm, thereby realizing the synchronous operation of testing, sorting and loading, and improving work efficiency.

[0047] The above are merely preferred embodiments of this application and do not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A device for detecting defects in the shaft hole of a sleeve part, characterized in that, The device includes a frame, with a first lifting cylinder at the top and a rotary drive mechanism connected to the bottom of the first lifting cylinder. The rotary drive mechanism is connected to multiple detection mechanisms arranged in a circular array. The rotary drive mechanism is used to drive the multiple detection mechanisms to rotate simultaneously. Each detection mechanism includes a rotating shaft connected to the rotary drive mechanism. The bottom of the rotating shaft is connected to multiple guide cylinders arranged in a circular array. The axial direction of the guide cylinders is perpendicular to the axial direction of the rotating shaft. A pressure sensor, a first spring, a slider, and a probe are arranged sequentially inside the guide cylinder. The probe extends out of the guide cylinder to the side away from the rotating shaft and is used to contact the inner wall of the sleeve to be tested.

2. The sleeve part shaft hole defect detection device as described in claim 1, characterized in that, The rotary drive mechanism includes a control box connected to the bottom of the first lifting cylinder, a first motor on the top of the control box, a drive gear connected to the first motor inside the control box, a plurality of driven gears connected to the top of the corresponding rotating shafts, and a bearing sleeve that mates with the corresponding rotating shafts on the bottom of the control box.

3. The sleeve part shaft hole defect detection device as described in claim 2, characterized in that, The outer wall of the rotating shaft is provided with a threaded section, and a positioning sleeve is threaded on the threaded section. The bottom of the positioning sleeve is flared, and the bottom inner wall of the positioning sleeve is used to compress the probe to the initial position inside the guide cylinder. The maximum outer diameter of the positioning sleeve is smaller than the inner diameter of the sleeve to be tested. Multiple arc-shaped plates arranged in a ring array are hinged to the bottom outer side of the positioning sleeve. A second spring is connected between the inner wall of the arc-shaped plate and the outer wall of the positioning sleeve.

4. The sleeve part shaft hole defect detection device as described in claim 3, characterized in that, A limit rod is provided at the bottom of the control box. The limit rod moves through the positioning sleeve. The section of the outer wall of the rotating shaft between the threaded section and the bottom of the control box is a smooth section. The smooth section is in movable fit with the positioning sleeve.

5. The sleeve part shaft hole defect detection device as described in claim 4, characterized in that, A thrust mechanism is installed at the bottom of the control box, which is used to apply thrust to the top of the positioning sleeve located in the smooth section.

6. The sleeve part shaft hole defect detection device as described in claim 5, characterized in that, The thrust mechanism includes a second lifting cylinder located at the bottom of the control box. A push plate is connected to the bottom of the second lifting cylinder. The push plate is movably sleeved on the smooth section of all rotating shafts and is used to contact the top of the positioning sleeve.

7. The device for detecting defects in the shaft hole of a sleeve part as described in any one of claims 3-6, characterized in that, The rotating shaft is a hollow shaft, and a reset mechanism is installed inside the hollow shaft. The reset mechanism is used to drive all the sliders to slide and reset towards the hollow shaft.

8. The sleeve part shaft hole defect detection device as described in claim 7, characterized in that, The reset mechanism includes a second motor installed inside the hollow shaft. The second motor is connected to a take-up and release wheel. Multiple pull wires are wound on the take-up and release wheel. The pull wires move through the side wall of the hollow shaft and extend into the corresponding guide cylinders to connect to one end of the slider.

9. The device for detecting defects in the shaft hole of a sleeve part as described in any one of claims 1-6, characterized in that, The bottom of the frame is equipped with a testing platform, and the top of the testing platform has multiple receiving slots for placing the sleeves to be tested. The testing platform is equipped with electromagnets that cover the area of ​​all receiving slots, and the electromagnets are used to attract the sleeves to be tested.

10. The sleeve part shaft hole defect detection device as described in claim 9, characterized in that, A third motor is installed at the bottom of the frame, and a turntable is connected to the top of the third motor. Multiple testing stations are arranged in a circular array around the center of the turntable. Any testing station can be rotated to be directly below the testing mechanism.

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