System for detecting flexibility of fixed bearing

Abstract

The utility model provides a flexibility detection system for a fixed bearing, which belongs to the field of machining and detection, and comprises a rotation flexibility detection system, a swing flexibility detection system, a positioning fixture and a verification assembly, and the positioning fixture positions and clamps a part to be detected and exposes the bearing; the rotation flexibility detection system is located on two sides of the to-be-detected part, one side is matched with the expansion rod through a three-jaw chuck to penetrate into the inner ring of the bearing and is expanded, and the other side drives the expansion rod and the bearing to rotate through a servo motor to detect the rotation torque; a shifting fork is arranged in the swing flexibility detection system and controlled by a servo motor to rotate, and a shifting rod of the shifting fork is inserted into a bearing inner ring to drive the bearing inner ring to swing and detect the swing torque. The verification assembly detects the accuracy of the rotation flexibility detection system and the swing flexibility detection system. According to the utility model, the problem that the existing device can only inspect standard sample pieces is solved, the reliability is higher, the swing and rotation flexibility inspection can be completed through one-time clamping, the efficiency is higher, and the automation degree is higher.

Description

Technical Field

[0001] The utility model belongs to the field of mechanical processing and detection, and relates to a flexibility detection system for a bearing after fixation. Background Art

[0002] The outer ring slotted self-lubricating bearings and spherical plain bearings installed on the aircraft control system and other parts, the outer ring 1-3 of the bearing is installed in the inner hole of the aircraft control system part 1-1, and after installation, it is necessary to follow Figure 1 The swing flexibility and rotation flexibility are checked in the prescribed manner. The bearing inner ring 1-2 should rotate to a certain angle β under the action of the torque Mkp. When checking the rotation flexibility of the bearing inner ring, the bearing inner ring 1-2 should rotate a certain number of revolutions under the action of the torque Mkp. Figure 2 As shown, the aircraft control system parts 1-1 have various shapes. The middle part is a disc structure, one side is an ear structure with an inner hole for installing bearings, and the other side is mostly a columnar structure. Figure 3 The installed bearing structure is shown in FIG.

[0003] Currently, the only way to apply torque Mkp is to attach a weight to one end of a lever arm and then measure the resulting rotation angle β under the action of torque Mkp. This inspection method has certain drawbacks. The lever arm, under the weight of the weight, generates torque Mkp, causing the bearing inner ring to rotate a certain angle. Because the weight of the weight is directed vertically downward, the torque Mkp changes as the bearing inner ring rotates. Furthermore, the inner ring rotation angle can only be determined by visually inspecting the scale marked by the lever arm, resulting in low measurement accuracy.

[0004] The invention patent application number 2021112854012, “A device for inspecting the rotation angle of a bearing after it is fixed,” and the invention patent application number 2021112851989, “A device for inspecting the swing angle of a bearing after it is fixed,” can both be used to inspect standard samples (standard samples refer to bearings installed in a ring, which is very different from the appearance of aircraft control system components). However, they can only verify the installation effect of the bearing in the test piece, and the installation effect of the actual part cannot be inspected. If a non-destructive test such as flexibility inspection only verifies the test piece, it will lead to quality risks. In addition, the swing flexibility inspection and the rotation flexibility inspection require two clampings, and the inspection efficiency is not high. Utility Model Content

[0005] In view of this, the utility model provides a bearing post-fixation flexibility detection system, which has the ability to detect the swing flexibility and rotation flexibility of the bearing after installation. It can not only perform inspections on the original parts of the aircraft control system after the bearings are installed, but also complete all the work of swing and rotation flexibility inspections in one clamping.

[0006] The specific technical solutions of the utility model are as follows:

[0007] A flexibility detection system for bearings after fixation, the flexibility detection system includes a rotation flexibility detection system 2, a swing flexibility detection system 3, an equipment stand 4, a positioning fixture 5, a sensor component 6, and a verification component 7.

[0008] The rotation flexibility detection system 2 includes a slide rail A 2-1, a support plate 2-2, a three-jaw chuck 2-3, an expansion rod 2-4, a turntable 2-5, a torque sensor A 2-6, a servo drive slide rail A 2-7, and a servo motor A 2-8.

[0009] The slide rail A2 - 1 and the servo drive slide rail A2 - 7 are arranged in a straight line and fixed on the equipment stand 4 .

[0010] The support plate 2-2 is fixed on the slider of the slide rail A2-1 and is used to fix the three-jaw chuck 2-3.

[0011] The three-jaw chuck 2-3 is a standard part, and the clamping surface of the jaw part thereof is an arc surface, which forms a cylindrical surface after closing, and is used to clamp the expansion rod 2-4.

[0012] One end of the expansion rod 2-4 is a thin rod, the middle part of the thin rod is a polished rod, and the end is processed to be flat. The outer diameter of the polished rod and the flat rod is smaller than the inner hole of the bearing inner ring 1-2 of the bearing to be tested. The other end of the thin rod is made into an inner hole and has a cross groove, so that this section has a certain compression and rebound ability; the other end of the expansion rod 2-4 is a cylindrical clamping end, and the clamping end is coaxial with the thin rod. A boss is made along the circumference of the clamping end close to the thin rod, and the clamping end is also made with an inner hole and a cross groove identical to the thin rod. The clamping end is clamped in the jaws of the three-jaw chuck 2-3, and the end face of the jaw is positioned at the shoulder of the boss. The clamping end under the jaws and the part of the thin rod with the cross groove are compressed to make the outer circle smaller. The thin rod is inserted into the inner hole of the bearing inner ring 1-2 until the bearing reaches the part of the thin rod with the cross groove. After the jaws of the three-jaw chuck 2-3 are released, the thin rod rebounds and tightens the inner hole of the bearing inner ring 1-2, so that the bearing inner ring 1-2 can rotate synchronously with the expansion rod 2-4.

[0013] The servo motor A2-8 is a finished part, fixed on the slider of the servo drive slide rail A2-7, and its output end faces the expansion rod 2-4 and is coaxial with the expansion rod 2-4.

[0014] The torque sensor A2-6 is a finished part, fixed on the slider of the servo drive slide rail A2-7, and is used to measure the torque. It is connected to the output end of the servo motor A2-8 through a coupling.

[0015] The middle section of the turntable 2-5 is a circular disc with an annular groove formed on its circumference. A coaxial circular boss is formed in the center of one side of the disc and is coaxially connected to the torque sensor A 2-6 through a coupling. A coaxial thin cylinder is formed in the center of the other side of the disc and is slotted radially along the axis for the flat insertion and clearance fit of the end of the expansion rod 2-4, so that the three-jaw chuck 2-3, the expansion rod 2-4, the turntable 2-5, the torque sensor A2-6 and the servo motor A2-8 are coaxial; the rotation of the servo motor A2-8 drives the turntable 2-5 to rotate, so that the expansion rod 2-4 and the torque sensor A 2-6 rotate synchronously.

[0016] The positioning fixture 5 includes a positioning bracket 5-1, a clamping block 5-2, a toggle clamp 5-3, an L-shaped support plate 5-4 and a base 5-5.

[0017] The base 5-5 is fixed on the equipment stand 4 and is located between the slide rail A2-1 and the servo drive slide rail A2-7.

[0018] The positioning bracket 5-1 is a plate-like structure, which is vertically fixed on the base 5-5. The upper part of the positioning bracket 5-1 is designed with a positioning groove according to the shape of the operating system part 1-1, so that the part 1 to be tested can be embedded in the groove to achieve positioning. After embedding, the bearing protrudes above the top of the positioning bracket 5-1, and the inner hole of the bearing is coaxial with the expansion rod 2-4. The positioning bracket 5-1 is designed with multiple different positioning grooves according to the shapes of different operating system parts 1-1 to adapt to various types of parts 1 to be tested.

[0019] The elbow clamp 5-3 is a finished part, and bending the wrench can provide a clamping force. A U-shaped clamping block 5-2 is installed at its end. Its U-shaped mouth cooperates with the disc structure of the control system part 1-1. Under the clamping force of the elbow clamp 5-3, the part 1 to be tested is clamped on the positioning bracket 5-1.

[0020] The L-shaped support plate 5-4 is installed at the connection between the positioning bracket 5-1 and the base 5-5 as an auxiliary reinforcement structure.

[0021] The swing flexibility detection system 3 includes a servo motor B 3-1, a motor fixing plate 3-2, a fixing column 3-3, a torque sensor B 3-4, a fixed base plate 3-5, a sensor fixing plate 3-6, a shift fork 3-7, a system fixed base plate 3-8, an L-shaped fixing plate 3-9, a servo drive slide rail B 3-10, a U-shaped bracket 3-11, a base plate 3-12 and a servo drive slide rail C 3-13.

[0022] The servo drive slide rail C 3-13 is fixed on the equipment stand 4, located on the side of the positioning fixture 5 and parallel to the servo drive slide rail A 2-7.

[0023] The base plate 3-12 is fixed on the slider of the servo drive slide C 3-13, the U-shaped bracket 3-11 is fixed on the base plate 3-12, the servo drive slide B 3-10 is vertically installed on the side of the U-shaped bracket 3-11, the system fixed base plate 3-8 is fixed on the slider of the servo drive slide B 3-10, there are two L-shaped fixed plates 3-9, the vertical sides of the two are fixed on both sides of the system fixed base plate 3-8, the horizontal bottom surfaces of the two are fixedly connected to the fixed base plate 3-5, the top of the fixed base plate 3-5 is fixed to the motor fixed plate 3-2 through the fixing column 3-3, and the centers of the fixed base plate 3-5 and the motor fixed plate 3-2 are both made with circular holes.

[0024] The servo motor B 3-1 is a finished product, fixedly mounted on the upper surface of the motor fixing plate 3-2, and its output end passes through the circular hole of the motor fixing plate 3-2.

[0025] The torque sensor B 3-4 is a finished part, which is fixed on the system fixed base plate 3-8 through the sensor fixing plate 3-6. It is located between the fixed base plate 3-5 and the motor fixing plate 3-2, and is connected to the output end of the servo motor B 3-1. The thin rod at its lower end passes through the fixed base plate 3-5. The thin rod is coaxial with the output shaft of the servo motor B 3-1 and rotates synchronously.

[0026] A hole is made at the upper end of the shift fork 3-7 for inserting the thin rod of the torque sensor B 3-4, and it is fastened and fixed through the bolt hole on the side of the shift fork 3-7, so that the shift fork 3-7 can rotate synchronously with the thin rod. A shift rod is provided at the lower end of the shift fork 3-7, which can fit the inner hole clearance of the bearing inner ring 1-2, and the shift rod intersects the hole axis of the upper end of the shift fork 3-7 perpendicularly.

[0027] The verification assembly 7 includes a turntable with a protruding rod 7-1, a verification turntable 7-2, a tension line 7-3, a weight 7-4, a verification bracket 7-5, a positioning pin 7-6, and a slide rail B 7-7.

[0028] The slide rail B 7-7 is fixed on the equipment stand 4 next to the servo drive slide rail A 2-7 and is parallel to the servo drive slide rail A2-7. Its slider is fixed in position on the equipment stand 4 by a positioning pin 7-6.

[0029] The calibration bracket 7-5 is L-shaped, and the lower end of its vertical plate is fixed on the slider of the slide rail B 7-7. A horizontal circular hole is made on the side of the upper end of the vertical plate for installing bearings, and the bearing axis is parallel to the turntable 2-5. A vertical circular hole is made at the end of the upper horizontal plate of the calibration bracket 7-5, and another bearing is installed in the circular hole. The bearing axis is perpendicular to the turntable 2-5.

[0030] The calibration turntable 7-2 is installed in the bearing in the horizontal circular hole on the calibration bracket 7-5 so that it can rotate freely. The outer circle of the calibration turntable 7-2 is made into a ring groove for embedding the tension wire 7-3. The position of the calibration turntable 7-2 is adjusted by the slide rail B 7-7 so that the center line of its ring groove is in the same plane as the center line of the ring groove of the turntable 2-5.

[0031] The convex rod of the turntable with a convex rod 7-1 is set at the center of the upper end surface of the turntable, and a horizontal circular hole is made on the convex rod for inserting the shift rod of the shift fork 3-7. The lower end of the turntable with a convex rod 7-1 is installed in the bearing in the vertical circular hole of the calibration bracket 7-5 so that it can rotate freely. The outer circle of the turntable with a convex rod 7-1 is also made of a ring groove for embedding the tension line 7-3.

[0032] One end of the tension line 7-3 is wound in the annular groove of the turntable 2-5 or the turntable with a protruding rod 7-1, and then passes through the annular groove of the calibration turntable 7-2. The other end is connected to the weight 7-4, which is a standard weight. The tension lines 7-3 on both sides of the annular groove of the calibration turntable 7-2 are located in the same plane.

[0033] The sensor assembly 6 is installed on the equipment stand 4 and is used to detect whether the positioning fixture 5 is fixed with the part 1 to be tested, so as to avoid the equipment running idle when no part is installed.

[0034] The working principle of verification component 7 is:

[0035] For the rotation flexibility detection system 2, one end of the tension line 7-3 is wound in the ring groove of the turntable 2-5. The ring groove of the turntable 2-5 rotates, and the calibration turntable 7-2 is driven to rotate through the weight 7-4 and the tension line 7-3. The torque on the turntable 2-5 can be obtained through calculation. The torque is compared with the measurement value of the torque sensor A2-6 to verify the accuracy of the rotation flexibility detection system 2.

[0036] For the swing flexibility detection system 3, one end of the tension line 7-3 is wound around the ring groove of the turntable 7-1 with a protruding rod, and the lever of the shift fork 3-7 is inserted into the horizontal circular hole of the turntable 7-1 with a protruding rod, so that the turntable 7-1 with a protruding rod is coaxial with the output shaft of the servo motor B 3-1. The rotation of the shift fork 3-7 drives the turntable 7-1 with a protruding rod to rotate, and the calibration turntable 7-2 is driven to rotate through the tension line 7-3 and the weight 7-4. The torque of the shift fork 3-7 can be obtained through calculation, and the torque is compared with the measurement value of the torque sensor B 3-4 to verify the accuracy of the detection system.

[0037] The beneficial effects of this utility model are that it can inspect different part shapes (manufacturing corresponding clamping tools), solving the problem of existing devices that can only inspect standard samples, and has higher reliability. At the same time, this utility model can complete swing and rotation flexibility inspections in a single clamping, which is more efficient and has a higher degree of automation. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 This is a schematic diagram of the inspection requirements after the bearing is installed;

[0039] Figure 2 Schematic diagram of the appearance of control system parts, where (a) to (c) are three different appearances of control system parts;

[0040] Figure 3 Schematic diagram of a bearing installed in the inner hole of a control system part;

[0041] Figure 4 It is an overall schematic diagram of the utility model;

[0042] Figure 5 This is a schematic diagram of the rotation flexibility detection system;

[0043] Figure 6 This is a structural diagram of the jaws of a three-jaw chuck;

[0044] Figure 7 This is the expansion rod structure diagram;

[0045] Figure 8 This is the turntable structure diagram;

[0046] Figure 9 This is a structural diagram of the swing flexibility detection system;

[0047] Figure 10 This is the structure diagram of the shift fork;

[0048] Figure 11 Schematic diagram of the positioning fixture structure;

[0049] Figure 12 The structural diagram of the positioning bracket is as follows:

[0050] Figure 13 Schematic diagram of the verification component structure:

[0051] Figure 14 It is the structural diagram of the turntable with the convex rod;

[0052] Figure 15 This is the structural diagram of the calibration bracket.

[0053] In the figure: 1 Parts to be tested; 2 Rotational flexibility detection system; 3 Swinging flexibility detection system; 4 Equipment stand; 5 Positioning fixture; 6 Sensor assembly; 7 Verification assembly; 1-1 Control system parts; 1-2 Bearing inner ring; 1-3 Bearing outer ring; 2-1 Slide rail A; 2-2 Support plate; 2-3 Three-jaw chuck; 2-4 Expansion rod; 2-5 Turntable; 2-6 Torque sensor A; 2-7 Servo drive slide rail A; 2-8 Servo motor A; 3-1 Servo motor B; 3-2 Motor fixing plate; 3-3 Fixing column; 3-4 Torque Sensor B; 3-5 Fixed base plate; 3-6 Sensor fixing plate; 3-7 Fork; 3-8 System fixing base plate; 3-9 L-type fixing plate; 3-10 Servo drive slide B; 3-11 U-type bracket; 3-12 Base plate; 3-13 Servo drive slide C; 5-1 Positioning bracket; 5-2 Clamping block; 5-3 Toggle clamp; 5-4 L-type support plate; 5-5 Base; 7-1 Turntable with raised rod; 7-2 Calibration turntable; 7-3 Tension line; 7-4 Weight; 7-5 Calibration bracket; 7-6 Locating pin; 7-7 Slide B. DETAILED DESCRIPTION

[0054] The following is a clear and complete description of the technical solution of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments improved or adjusted by ordinary technicians in this field fall within the scope of protection of the present invention.

[0055] This embodiment provides a bearing flexibility detection system after fixation, the flexibility detection system includes a rotation flexibility detection system 2, a swing flexibility detection system 3, an equipment stand 4, a positioning fixture 5, a sensor component 6, and a verification component 7. Figure 4 shown.

[0056] like Figure 5 As shown, the rotation flexibility detection system 2 includes a slide rail A 2-1, a support plate 2-2, a three-jaw chuck 2-3, an expansion rod 2-4, a turntable 2-5, a torque sensor A 2-6, a servo drive slide rail A 2-7, and a servo motor A 2-8.

[0057] The slide rail A2 - 1 and the servo drive slide rail A2 - 7 are standard parts, arranged in a straight line and fixed to the equipment stand 4 by bolts.

[0058] The support plate 2-2 is T-shaped to facilitate structural stability and is fixed to the slider of the slide rail A2-1 by bolts to fix the three-jaw chuck 2-3.

[0059] The three-jaw chuck 2-3 is a standard part, such as Figure 6 As shown, the clamping surface of the clamping claw part is an arc surface, which forms a cylindrical surface after closing to clamp the expansion rod 2-4.

[0060] like Figure 7 As shown, one end of the expansion rod 2-4 is a thin rod, the middle part of the thin rod is a polished rod, and the end is processed to be flat. The outer diameter of the polished rod and the flat rod is smaller than the inner hole of the bearing inner ring 1-2. The other end of the thin rod is made into an inner hole and has a cross groove, so that this section has a certain compression and rebound ability; the other end of the expansion rod 2-4 is a cylindrical clamping end, and the clamping end is coaxial with the thin rod. A boss is made along the circumference of the clamping end close to the thin rod, and the clamping end is also made with an inner hole and a cross groove identical to the thin rod. The clamping end is clamped in the jaws of the three-jaw chuck 2-3, and the end face of the jaw is positioned at the shoulder of the boss. The clamping end and the part of the thin rod with a cross groove are compressed to make the outer circle smaller. The thin rod is inserted into the inner hole of the bearing inner ring 1-2 until the bearing reaches the part of the thin rod with a cross groove. After the jaws of the three-jaw chuck 2-3 are released, the thin rod rebounds and tightens the inner hole of the bearing inner ring 1-2, so that the bearing inner ring 1-2 can rotate synchronously with the expansion rod 2-4.

[0061] The servo motor A2-8 is a finished part, which is fixed to the slider of the servo drive slide rail A2-7 by bolts, and its output end faces the expansion rod 2-4 and is coaxial with the expansion rod 2-4.

[0062] The torque sensor A2-6 is a finished part, which is fixed on the slider of the servo drive slide rail A2-7 through a support plate and is used to measure torque. It is connected to the output end of the servo motor A2-8 through a coupling.

[0063] like Figure 8 As shown, the middle section of the turntable 2-5 is a circular disc with an annular groove formed on its circumference. A coaxial circular boss is formed in the center of one side of the disc, which is coaxially connected to the torque sensor A 2-6 through a coupling. A coaxial thin cylinder is formed in the center of the other side of the disc. The thin cylinder is slotted radially along the axis for the flat insertion and clearance fit of the end of the expansion rod 2-4, so that the three-jaw chuck 2-3, the expansion rod 2-4, the turntable 2-5, the torque sensor A2-6, and the servo motor A2-8 are coaxial; the rotation of the servo motor A2-8 drives the turntable 2-5 to rotate, so that the expansion rod 2-4 and the torque sensor A 2-6 rotate synchronously.

[0064] The positioning fixture 5 includes a positioning bracket 5-1, a clamping block 5-2, a toggle clamp 5-3, an L-shaped support plate 5-4 and a base 5-5. Figure 11 shown.

[0065] The base 5-5 is fixed on the equipment stand 4 and is located between the slide rail A2-1 and the servo drive slide rail A2-7.

[0066] like Figure 12As shown, the positioning bracket 5-1 is a plate-like structure, which is vertically fixed on the base 5-5. The upper part of the positioning bracket 5-1 is designed with a positioning groove according to the shape of the control system part 1-1, so that the part 1 to be tested can be embedded in the groove to achieve positioning. After embedding, the bearing protrudes above the top of the positioning bracket 5-1, and the inner hole of the bearing is coaxial with the expansion rod 2-4.

[0067] The elbow clamp 5-3 is a finished part, and bending the wrench can provide a clamping force. A U-shaped clamping block 5-2 is installed at its end. Its U-shaped mouth cooperates with the disc structure of the control system part 1-1. Under the clamping force of the elbow clamp 5-3, the part 1 to be tested is clamped on the positioning bracket 5-1.

[0068] The L-shaped support plate 5-4 is installed at the connection between the positioning bracket 5-1 and the base 5-5 as an auxiliary reinforcement structure.

[0069] like Figure 9 As shown, the swing flexibility detection system 3 includes a servo motor B 3-1, a motor fixing plate 3-2, a fixing column 3-3, a torque sensor B 3-4, a fixed base plate 3-5, a sensor fixing plate 3-6, a shift fork 3-7, a system fixed base plate 3-8, an L-shaped fixing plate 3-9, a servo drive slide rail B 3-10, a U-shaped bracket 3-11, a base plate 3-12 and a servo drive slide rail C 3-13.

[0070] The servo drive slide rail C 3-13 is fixed on the equipment stand 4, located on the side of the positioning fixture 5 and parallel to the servo drive slide rail A 2-7.

[0071] The base plate 3-12 is fixed on the slider of the servo drive slide C 3-13, the U-shaped bracket 3-11 is fixed on the base plate 3-12, the servo drive slide B 3-10 is vertically installed on the side of the U-shaped bracket 3-11, the system fixed base plate 3-8 is fixed on the slider of the servo drive slide B 3-10, there are two L-shaped fixed plates 3-9, the vertical sides of the two are fixed on both sides of the system fixed base plate 3-8, and the bottom surfaces of the horizontal sides of the two are fixedly connected to the fixed base plate 3-5. Fixed columns 3-3 are fixed at the four corners of the upper surface of the fixed base plate 3-5, the motor fixed plate 3-2 is fixedly installed on the top of the four fixed columns 3-3, and circular holes are made in the centers of the fixed base plate 3-5 and the motor fixed plate 3-2.

[0072] The servo motor B 3-1 is a finished product, fixedly mounted on the upper surface of the motor fixing plate 3-2, and its output end passes through the circular hole of the motor fixing plate 3-2.

[0073] The torque sensor B 3-4 is a finished part, which is fixed on the system fixed base plate 3-8 through the L-shaped sensor fixing plate 3-6. It is located between the fixed base plate 3-5 and the motor fixing plate 3-2, and is connected to the output end of the servo motor B 3-1. The thin rod at its lower end passes through the fixed base plate 3-5. The thin rod is coaxial with the output shaft of the servo motor B 3-1 and rotates synchronously.

[0074] like Figure 10 As shown, the shift fork 3-7 is L-shaped, and the horizontal plate at the upper end is formed with a vertical through hole and a slot for inserting the thin rod of the torque sensor B 3-4. The side of the horizontal plate is formed with a horizontal bolt hole for fastening it with the thin rod of the torque sensor B 3-4 through bolts, so that the shift fork 3-7 can rotate synchronously with the thin rod. The lower end of the shift fork 3-7 is provided with a transversely arranged shift rod, which can be clearance-matched with the inner hole of the bearing inner ring 1-2, and the shift rod intersects perpendicularly with the hole axis of the upper end of the shift fork 3-7.

[0075] like Figure 13 As shown, the verification assembly 7 includes a turntable with a protruding rod 7-1, a verification turntable 7-2, a tension line 7-3, a weight 7-4, a verification bracket 7-5, a positioning pin 7-6, and a slide rail B 7-7.

[0076] The slide rail B 7-7 is fixed on the equipment stand 4 next to the servo drive slide rail A 2-7 and is parallel to the servo drive slide rail A2-7. Its slider is fixed to its position on the equipment stand 4 by a positioning pin 7-6.

[0077] like Figure 15 As shown, the calibration bracket 7-5 is L-shaped, and the lower end of its vertical plate is fixed on the slider of the slide rail B 7-7. A horizontal circular hole is formed on the side of the upper end of the vertical plate for installing bearings, and the bearing axis is parallel to the turntable 2-5. A vertical circular hole is formed at the end of the upper horizontal plate of the calibration bracket 7-5, and another bearing is installed in the circular hole. The bearing axis is perpendicular to the turntable 2-5.

[0078] The calibration turntable 7-2 is installed in the bearing in the horizontal circular hole on the calibration bracket 7-5 so that it can rotate freely. The outer circle of the calibration turntable 7-2 is made into a ring groove for embedding the tension wire 7-3. The position of the calibration turntable 7-2 is adjusted by the slide rail B 7-7 so that the center line of its ring groove is in the same plane as the center line of the ring groove of the turntable 2-5.

[0079] like Figure 14 As shown, the convex rod of the turntable with convex rod 7-1 is set at the center of the upper end surface of the turntable, and a horizontal circular hole is made on the convex rod for inserting the shift rod of the shift fork 3-7. The lower end of the turntable with convex rod 7-1 is installed in the bearing in the vertical circular hole of the calibration bracket 7-5 so that it can rotate freely. The outer circle of the turntable with convex rod 7-1 is also made of an annular groove for embedding the tension line 7-3.

[0080] One end of the tension line 7-3 is wound in the ring groove of the turntable 2-5 or the ring groove of the turntable 7-1 with a protruding rod, and then passes through the ring groove of the calibration turntable 7-2. The other end is connected to the weight 7-4. The weight 7-4 is a standard weight, and the tension lines 7-3 on both sides of the ring groove of the calibration turntable 7-2 are located in the same plane.

[0081] The sensor assembly 6 is installed on the equipment stand 4 and is used to detect whether the positioning fixture 5 is fixed with the part 1 to be tested, so as to avoid the equipment running idle when no part is installed.

[0082] The method for using the flexibility detection system comprises the following steps:

[0083] Step 1: Self-test of the rotational flexibility detection system 2:

[0084] Move the slide rail B 7-7 to drive the calibration bracket 7-5, and under the locking of the positioning pin 7-6, make the center lines of the ring groove of the turntable 2-5 and the ring groove of the calibration turntable 7-2 coplanar; fix the tension line 7-3 on the ring groove of the turntable 2-5, then pass it through the ring groove of the calibration turntable 7-2, and connect the other end to the weight 7-4. Start the servo motor A2-8 to drive the turntable 2-5 to rotate, and then drive the calibration turntable 7-2 to rotate. Compare the measurement data of the torque sensor A2-6 with the converted torque. The approximate result indicates that the system is normal.

[0085] Step 2: Self-test of the swing flexibility detection system 3:

[0086] The movable slide rail B 7-7 drives the calibration bracket 7-5, and under the locking of the positioning pin 7-6, the position and height of the shift fork 3-7 lever are adjusted by cooperating with the servo drive slide rail B 3-10 and the servo drive slide rail C 3-13, so that the shift fork 3-7 lever is inserted into the round hole at the position of the protruding rod of the turntable with protruding rod 7-1, and the turntable with protruding rod 7-1 is coaxial with the output shaft of the servo motor B 3-1; after the tension line 7-3 is wound around the annular groove of the turntable with protruding rod 7-1, the tension line 7-3 passes through the annular groove of the calibration turntable 7-2 and is connected to the weight 7-4. At this time, each section of the tension line 7-3 is in the same plane; the servo motor B 3-1 drives the shift fork 3-7 to rotate, and then drives the turntable with the protruding rod 7-1 to rotate, and drives the calibration turntable 7-2 to rotate through the tension line 7-3 and the weight 7-4. The torque on the turntable 2-5 can be obtained through calculation, and the torque is compared with the measurement value of the torque sensor A2-6 to verify the accuracy of the swing flexibility detection system 3.

[0087] Step 3: Install the part to be tested 1:

[0088] The part to be tested 1 is mounted on the positioning fixture 5 and fixed by the toggle clamp 5-3, ensuring that the axes of the bearing inner ring 1-2 and the bearing outer ring 1-3 are coaxial, and the axes are coaxial with the three-jaw chuck 2-3, the expansion rod 2-4, the turntable 2-5, the torque sensor A2-6 and the servo motor A 2-8; the sensor assembly 6 detects the installation of the part to be tested 1.

[0089] Step 4: The rotation flexibility detection system 2 starts working:

[0090] First, the three-jaw chuck 2-3 clamps the clamping end of the expansion rod 2-4 to reduce its outer diameter, and moves the slide rail A2-1 to insert the thin rod of the expansion rod 2-4 into the inner ring of the bearing 1-2. At the same time, move the servo drive slide rail A 2-7, so that the flat end of the expansion rod 2-4 is inserted into the groove of the turntable 2-5; the three-jaw chuck 2-3 is loosened to make the expansion rod 2-4 tighten the inner hole of the bearing inner ring 1-2, the three-jaw chuck 2-3 releases the clamping of the expansion rod 2-4, and moves the slide rail A2-1, so that the three-jaw chuck 2-3 no longer restricts the expansion rod 2-4; start the servo motor A2-8, drive the torque sensor A2-6, turntable 2-5, expansion rod 2-4 and bearing inner ring 1-2 to rotate, and the torque sensor A2-6 measures the rotational torque; move the slide rail A2-1, the three-jaw chuck 2-3 clamps the expansion rod 2-4 again and clamps it, and moves the slide rail A2-1 to pull the expansion rod 2-4 out of the bearing inner hole.

[0091] Step 5: The rotation flexibility detection system 3 starts working:

[0092] Move the servo drive slide B 3-10 and the servo drive slide C 3-13 to insert the shift rod of the shift fork 3-7 into the bearing inner ring 1-2, so that the axis of the output shaft of the servo motor B 3-1 intersects the axis of the bearing inner ring 1-2 perpendicularly; start the servo motor B 3-1 to drive the torque sensor B 3-4 and the shift fork 3-7 to rotate, so that the bearing inner ring 1-2 swings, and the torque sensor B 3-4 measures the swing torque; after the shift fork 3-7 returns to the center, move the servo drive slide B 3-10 and the servo drive slide C 3-13 to pull the shift rod of the shift fork 3-7 out of the bearing inner ring 1-2.

[0093] The above-described embodiments merely express the implementation methods of the present invention, but they should not be understood as limiting the scope of the present invention. It should be pointed out that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention, and these all fall within the scope of protection of the present invention.

Claims

1. A bearing fixed flexibility detection system, characterized in that: The flexibility detection system comprises a rotation flexibility detection system (2), a swing flexibility detection system (3), an equipment stand (4), and a positioning fixture (5); The rotational flexibility detection system (2) comprises a slide rail A (2-1), a three-jaw chuck (2-3), an expansion rod (2-4), a turntable (2-5), a torque sensor A (2-6), a servo drive slide rail A (2-7), and a servo motor A (2-8); The slide rail A (2-1) and the servo drive slide rail A (2-7) are arranged in a straight line and fixed on the equipment stand (4); The three-jaw chuck (2-3) is fixed on the slider of the slide rail A (2-1) and is a standard part. The clamping surface of the three-jaw chuck forms a cylindrical surface after the chuck is closed. One end of the expansion rod (2-4) is a thin rod, the middle part of the thin rod is a polished rod, and the end is processed into a flat rod. The outer diameter of the polished rod and the flat rod is smaller than the inner hole of the bearing inner ring (1-2) of the bearing to be tested. The other end of the thin rod is made into an inner hole and has a cross groove. The other end of the expansion rod (2-4) is a cylindrical clamping end, which is coaxial with the thin rod and also has an inner hole and a cross groove. The clamping end is clamped in the jaws of the three-jaw chuck (2-3). The servo motor A (2-8) is fixed on the slider of the servo drive slide rail A (2-7), and its output end faces the expansion rod (2-4) and is coaxial with the expansion rod (2-4); The torque sensor A (2-6) is fixed on the slider of the servo drive slide rail A (2-7), connected to the output end of the servo motor A (2-8) and rotates synchronously; The middle section of the turntable (2-5) is a disk with an annular groove formed on its circumference. A coaxial circular boss is formed at the center of one side of the disk and is coaxially connected to the torque sensor A (2-6) and rotates synchronously. A coaxial thin cylinder is formed at the center of the other side of the disk. The thin cylinder is slotted radially along the axis and is used to insert the flat end of the expansion rod (2-4) and to fit the thin cylinder and rotate synchronously, so that the three-jaw chuck (2-3), the expansion rod (2-4), the turntable (2-5), the torque sensor A (2-6), and the servo motor A (2-8) are coaxial. The positioning fixture (5) comprises a positioning bracket (5-1) and a toggle clamp (5-3); The positioning bracket (5-1) is fixed on the equipment stand (4) and is located between the slide rail A (2-1) and the servo drive slide rail A (2-7). The upper portion of the positioning bracket (5-1) is designed with a positioning groove according to the shape of the control system part (1-1) for positioning and embedding the part to be tested (1), and the inner hole of the bearing is coaxial with the expansion rod (2-4); the elbow clamp (5-3) is a finished part and is used to clamp the part to be tested (1) on the positioning bracket (5-1); The swing flexibility detection system (3) comprises a servo motor B (3-1), a torque sensor B (3-4), a shift fork (3-7), a servo drive slide rail B (3-10) and a servo drive slide rail C (3-13); The servo drive slide rail C (3-13) is fixed on the equipment stand (4), located on the side of the positioning fixture (5) and parallel to the servo drive slide rail A (2-7); The servo drive slide rail B (3-10) is vertically mounted on the servo drive slide rail C (3-13) slider. A servo motor B (3-1) and a torque sensor B (3-4) are fixed on the servo drive slide rail B (3-10) slider. The output end of the servo motor B (3-1) is downwardly connected to the torque sensor B (3-4). The thin rod at the lower end of the torque sensor B (3-4) is coaxial with the output shaft of the servo motor B (3-1) and rotates synchronously. The shift fork (3-7) is fixedly connected to the thin rod of the torque sensor B (3-4) and rotates synchronously. A shift rod is provided at the lower end of the shift fork (3-7) and can be clearance-matched with the inner hole of the bearing inner ring (1-2). The shift rod and the hole axis of the upper end of the shift fork (3-7) intersect vertically.

2. A bearing post-fixation flexibility detection system according to claim 1, characterized in that: The flexibility detection system further comprises a verification component (7) for self-testing the rotational flexibility detection system (2) and the swinging flexibility detection system (3), comprising a turntable with a protruding rod (7-1), a verification turntable (7-2), a tension line (7-3), a weight (7-4), a verification bracket (7-5), and a slide rail B (7-7); The slide rail B (7-7) is fixed on the equipment stand (4) next to the servo drive slide rail A (2-7) and is parallel to the servo drive slide rail A (2-7); The verification bracket (7-5) is L-shaped, and the lower end of its vertical plate is fixed on the slider of the slide rail B (7-7). A horizontal circular hole is formed on the side surface of the upper end of the vertical plate for installing a bearing, and the axis of the bearing is parallel to the turntable (2-5). A vertical circular hole is formed on the end of the upper horizontal plate of the verification bracket (7-5), and another bearing is installed in the circular hole. The axial direction of the bearing is perpendicular to the turntable (2-5); The test turntable (7-2) is installed in a bearing in a transverse circular hole on a test bracket (7-5), and a ring groove is formed on its outer circle for embedding a tension wire (7-3). When in use, the center line of the ring groove is located in the same plane as the center line of the ring groove of the turntable (2-5); The protruding rod of the rotating disk with a protruding rod (7-1) is arranged at the center of the upper end surface of the rotating disk, and a transverse circular hole is formed on the protruding rod for inserting the shifting rod of the shift fork (3-7). The lower end of the rotating disk with a protruding rod (7-1) is installed in a bearing in a vertical circular hole of the calibration bracket (7-5). The outer circle of the rotating disk with a protruding rod (7-1) is also formed with a ring groove for embedding the tension wire (7-3). One end of the tension wire (7-3) is wound in the annular groove of the turntable (2-5) or the turntable with a protruding rod (7-1), and then passes through the annular groove of the calibration turntable (7-2). The other end is connected to the weight (7-4). When in use, the tension wires (7-3) located on both sides of the annular groove of the calibration turntable (7-2) are located in the same plane.

3. The bearing post-fixation flexibility detection system according to claim 1, characterized in that: The flexibility detection system also includes a sensor assembly (6), which is installed on the equipment stand (4) and is used to detect whether the positioning fixture (5) is fixed with the part to be tested (1) to prevent the equipment from idling.

4. A bearing post-fixation flexibility detection system according to claim 1, characterized in that: The positioning bracket (5-1) is designed with a plurality of different positioning grooves according to the shapes of different operating system parts (1-1), so as to be applicable to various parts (1) to be tested.

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