Precise bearing bush scraping device

Abstract

The utility model discloses an accurate bearing bush scraping device, which is characterized in that a horizontally arranged guide rod is fixed between two support frames, a screw driving motor is fixed on one support frame, a screw parallel to the guide rod is fixed at the output end of the screw driving motor, and the other end of the screw is rotatably connected with the other support frame; the scraper device comprises an outer sheath, a motor base, a scraper, an outer sheath driving motor and two connecting discs, the motor base is fixed between the two connecting discs, a bearing coaxial with the screw rod is arranged on the motor base, an inner ring of the bearing is fixedly connected with the motor base, and an outer ring of the bearing is fixedly connected with the inner wall of the cylindrical outer sheath; a gear ring coaxially arranged with the outer sheath is fixed on the inner wall of the outer sheath, at least one outer sheath driving motor is fixed on the motor seat, and an outer sheath driving gear meshed with the gear ring is fixed at the output end of the outer sheath driving motor; and at least one scraper is fixed on the outer wall of the outer sheath.

Description

Technical Field

[0001] The utility model relates to the technical field of bearing bush processing, in particular to a precise bearing bush scraping device. Background Art

[0002] The bearing shell is an important part of the sliding bearing. When the sliding bearing is working, a very thin oil film is required between the bearing shell and the rotating shaft for lubrication. If the lubrication is poor, direct friction will occur on the contact surface between the bearing shell and the rotating shaft, and the friction force will be concentrated on a certain point or area, which will destroy the oil film. The heat generated by the friction will also increase, causing the temperature of the bearing shell to rise. In severe cases, it will cause the bearing shell to burn out. At the same time, after the bearing shell has been running for a long time, burrs will appear on the surface, and impurities in the lubricating oil will also cause the shell to burn.

[0003] To solve this problem, the bearing needs to be scraped to create a spiral wedge-shaped gap on the surface of the bearing, so that an oil film is formed in the wedge-shaped gap to reduce the wear between the bearing and the shaft.

[0004] At present, bearings are mainly scraped manually, which is labor-intensive and inefficient. Manual operation also leads to uneven scraping, which affects the uniformity of the lubricating oil and reduces the service life of the bearing. Utility Model Content

[0005] The utility model aims to provide a precise bearing bush scraping device.

[0006] The utility model is implemented by the following technical scheme: a precise scraping device for the bearing bush, a support frame, a guide rod, a screw rod, and a scraper device;

[0007] A horizontally arranged guide rod is fixed between the two support frames, a screw drive motor is fixed on one of the support frames, the output end of the screw drive motor is fixed with the screw arranged parallel to the guide rod, and the other end of the screw is rotatably connected to the other support frame;

[0008] The scraper device comprises an outer sheath, a motor seat, a scraper, an outer sheath driving motor, and two connecting plates, each of which is provided with a ball nut threadedly connected to the screw rod, and each connecting plate is provided with a guide hole through which the guide rod slides;

[0009] The motor seat is fixed between the two connecting plates, and a bearing coaxially arranged with the screw is provided on the motor seat, the inner ring of the bearing is fixedly connected to the motor seat, and the outer ring of the bearing is fixedly connected to the inner wall of the cylindrical outer sleeve;

[0010] A gear ring coaxially arranged therewith is fixed on the inner wall of the outer sheath, at least one outer sheath driving motor is fixed on the motor seat, and an outer sheath driving gear meshing with the gear ring is fixed at the output end of the outer sheath driving motor;

[0011] At least one scraper is fixed on the outer wall of the outer sheath.

[0012] Furthermore, it also includes a base, on the top surface of which two support frames are vertically fixed, on the top surface of which a lifting bracket is fixed, on the top surface of which a bearing clamping device is fixed, the bearing clamping device is placed directly below the scraper device.

[0013] Furthermore, the bearing bush clamping device comprises a clamping seat, a support rod, and a clamping head. Two clamping grooves parallel to each other are provided on the top surface of the clamping seat, and the length direction of the clamping grooves is perpendicular to the axial direction of the screw rod.

[0014] An upper rack and a lower rack are slidably disposed in the two clamping slide grooves, respectively, with teeth arranged opposite to each other up and down.

[0015] The support rods are vertically arranged on the upper rack and the lower rack, respectively, the top ends of the support rods placed outside the clamping seat are fixedly connected to the clamping heads, and the two clamping heads are arranged opposite to each other;

[0016] A through hole communicating with the two clamping slide grooves is provided in the clamping seat, and the through hole is arranged parallel to the screw rod;

[0017] A spline shaft meshing with the upper rack and the lower rack is rotatably arranged in the through hole;

[0018] A clamping drive motor drivingly connected to the spline shaft is provided on the opening at one end of the through hole, and a first torque sensor is provided between the output end of the clamping drive motor and the spline shaft.

[0019] Furthermore, the support rod is any one of an oil cylinder, an electric push rod, a hydraulic rod or a telescopic cylinder section.

[0020] Furthermore, the telescopic cylinder segment comprises a plurality of cylinder segments nested with each other, the bottom end of the innermost cylinder segment is fixedly connected to the upper rack or the lower rack, and a lifting drive device is connected between two adjacent cylinder segments;

[0021] The lifting drive device includes a barrel segment rack, a barrel segment driving gear, and a barrel segment motor. Among the two adjacent barrel segments, the outer wall of the barrel segment located in the inner layer is fixed with the vertically arranged barrel segment rack, and the outer wall of the barrel segment located in the outer layer is provided with a barrel segment notch corresponding to the barrel segment rack, and the barrel segment motor is fixed on the outer wall of the barrel segment on one side of the barrel segment notch, and the output end of the barrel segment motor is fixed with the barrel segment driving gear through a second torque sensor, and the barrel segment driving gear is meshed with the barrel segment rack through the barrel segment notch.

[0022] Furthermore, the scraper includes a blade seat, a blade handle, and a blade head. The blade seat is fixed to the outer wall of the outer sheath, the blade handle is detachably connected to the blade seat, and the blade head is fixed to the blade handle.

[0023] Furthermore, the outer wall of the outer sheath is detachably connected with a laser distance measuring sensor arranged along the radial direction of the screw.

[0024] Furthermore, a controller is included, wherein the input end of the controller is electrically connected to the first torque sensor, the second torque sensor, and the laser ranging sensor, and the output end of the controller is electrically connected to the outer sheath drive motor, the clamping drive motor, the barrel motor, and the screw drive motor.

[0025] The utility model has the advantages that the outer sheath in the scraper moves in a circular motion along the screw rod under the action of the outer sheath driving motor, and the scraper on the scraper also moves in a circular motion along the screw rod under the drive of the outer sheath. Through the cooperation of the screw rod and the screw driving motor, the scraper on the scraper can realize spiral motion, and the inner surface of the bearing bush is scraped and polished to form a uniform fish scale pattern, and the lubricating oil is stored in the small pits formed by the pattern, so that the lubricating oil is evenly distributed on the inner surface of the bearing bush, which has a good lubrication effect, reduces the wear between the bearing bush and the rotating shaft, and increases the service life of the bearing bush.

[0026] The torque value of each component is displayed through the controller, and the control buttons of each motor are set on the controller to facilitate the control of the forward and reverse rotation of each motor. The device has a high degree of automation and more precise operation, which can effectively reduce the labor intensity of the staff and improve work efficiency.

[0027] The specially designed scraper device simplifies the drive structure of the scraper through two connecting plates and the outer sleeve. At the same time, the handle and the cutter head assembly can be selectively adjusted according to the model of the bearing, which has a wide adaptability. At the same time, the outer sleeve drive motor is arranged inside the outer sleeve, which effectively reduces the dust generated in the scraping process from entering the driving part of the outer sleeve, thereby extending the service life of the outer sleeve drive motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0029] Figure 1 It is a schematic diagram of the use state of the utility model;

[0030] Figure 2 for Figure 1 A is a partial enlarged schematic diagram;

[0031] Figure 3 It is a structural schematic diagram of the utility model;

[0032] Figure 4 is a cross-sectional view of the utility model;

[0033] Figure 5 for Figure 4 A partial enlarged view of B in the middle;

[0034] Figure 6 It is a front cross-sectional view of the scraper device of the utility model;

[0035] Figure 7 It is a side cross-sectional view of the scraper device of the utility model;

[0036] In the figure: support frame 1, guide rod 2, screw drive motor 3, screw 4, scraper device 5, outer sheath 5.1, motor seat 5.2, scraper 5.3, knife seat 5.3.1, knife handle 5.3.2, knife head 5.3.3, outer sheath drive motor 5.4, connecting plate 5.5, guide hole 5.6, outer sheath drive gear 5.7, bearing 5.8, gear ring 5.9, ball nut 5.10, base 6, lifting bracket 7, bearing bush clamping device 8, clamping seat 8.1, support rod 8.2, Clamping head 8.3, clamping slide 8.4, upper rack 8.5, lower rack 8.6, slot 8.7, through hole 8.8, spline shaft 8.9, clamping drive motor 8.10, first torque sensor 8.11, telescopic cylinder section 9, cylinder section 9.1, lifting drive device 10, cylinder section rack 10.1, cylinder section drive gear 10.2, cylinder section motor 10.3, cylinder section notch 10.4, second torque sensor 10.5, laser distance sensor 11, controller 12, bearing 13. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0038] like Figure 1-7 As shown, a precise scraping device for a bearing bush comprises a support frame 1, a guide rod 2, a screw rod 4, and a scraper device 5;

[0039] A horizontally arranged guide rod 2 is fixed between the two support frames 1, a screw drive motor 3 is fixed on one of the support frames 1, a screw 4 arranged parallel to the guide rod 2 is fixed on the output end of the screw drive motor 3, and the other end of the screw 4 is rotatably connected to the other support frame 1;

[0040] The scraper device 5 comprises an outer sheath 5.1, a motor seat 5.2, a scraper 5.3, an outer sheath driving motor 5.4, and two connecting plates 5.5. The two connecting plates 5.5 are respectively provided with ball nuts 5.10 threadedly connected to the screw rod 4. The connecting plates 5.5 are provided with guide holes 5.6 through which the guide rod 2 slides.

[0041] The scraper device 5 is slidably connected to the guide rod 2, and moves along the screw rod 4 under the action of the screw rod 4 and the screw drive motor 3. At the same time, under the action of the guide rod 2, the scraper device 5 is limited so that the scraper device 5 moves smoothly along the guide rod 2.

[0042] A motor base 5.2 is fixed between the two connecting plates 5.5, and a bearing 5.8 coaxially arranged with the screw 4 is provided on the motor base 5.2, and the inner ring of the bearing 5.8 is fixedly connected to the motor base 5.2, and the outer ring of the bearing 5.8 is fixedly connected to the inner wall of the cylindrical outer sleeve 5.1; a gear ring 5.9 coaxially arranged therewith is fixed on the inner wall of the outer sleeve 5.1, at least one outer sleeve driving motor 5.4 is fixed on the motor base 5.2, and an outer sleeve driving gear 5.7 meshing with the gear ring 5.9 is fixed at the output end of the outer sleeve driving motor 5.4; at least one scraper 5.3 is fixed on the outer wall of the outer sleeve 5.1.

[0043] The specially designed scraper device 5 simplifies the drive structure of the scraper 5.3 through two connecting plates 5.5 and the outer sheath 5.1. The outer sheath drive motor 5.4 is arranged inside the outer sheath 5.1, which effectively reduces the dust generated during the scraping process and enters the drive part of the outer sheath 5.1, thereby extending the service life of the outer sheath drive motor 5.4.

[0044] Under the action of the outer sleeve driving motor 5.4, the outer sleeve 5.1 in the scraper 5.3 makes a circular motion along the screw 4. Driven by the outer sleeve 5.1, the scraper 5.3 on the scraper 5.3 also makes a circular motion along the screw 4. Through the cooperation of the screw 4 and the screw driving motor 3, the scraper 5.3 on the scraper 5.3 can realize spiral motion, scraping and grinding the inner surface of the bearing 13 to form a uniform fish scale pattern, storing the lubricating oil in the small pits formed by the pattern, so that the lubricating oil is evenly distributed on the inner surface of the bearing 13, which has a good lubricating effect, reduces the wear between the bearing 13 and the rotating shaft, and increases the service life of the bearing 13.

[0045] It also includes a base 6, the function of the base 6 is to facilitate the movement of the device, two support frames 1 are vertically fixed on the top surface of the base 6, a lifting bracket 7 is fixed on the top surface of the base 6 between the two support frames 1, the lifting bracket 7 is electric or hydraulic, and a bearing 13 clamping device 8 is fixed on the lifting bracket 7, and the bearing 13 clamping device 8 is placed directly below the scraper device 5.

[0046] The function of the bearing 13 clamping device 8 is to clamp and fix the bearing 13, so that the scraper device 5 can scrape the bearing 13 and reduce the shaking of the bearing 13 during the scraping process. The function of the lifting bracket 7 is to adjust the height according to the diameter and model of the bearing 13 so that the scraper 5.3 contacts the inner wall of the bearing 13.

[0047] The bearing bush 13 clamping device 8 comprises a clamping seat 8.1, a support rod 8.2, and a clamping head 8.3. Two parallel clamping grooves 8.4 are provided on the top surface of the clamping seat 8.1. The length direction of the clamping grooves 8.4 is perpendicular to the axial direction of the screw rod 4.

[0048] An upper rack 8.5 and a lower rack 8.6 with teeth arranged opposite to each other are slidably disposed in the two clamping grooves 8.4, and a support rod 8.2 is vertically disposed on the upper rack 8.5 and the lower rack 8.6, respectively. The top end of the support rod 8.2 placed on the outside of the clamping seat 8.1 is fixedly connected to the clamping head 8.3, and the two clamping heads 8.3 are arranged opposite to each other; a clamping groove 8.7 is provided at the bottom end of the clamping head 8.3 close to the bearing shell 13, and is clamped and fixed to the edge of the bearing shell 13 through the clamping groove 8.7. A through hole 8.8 connected to the two clamping grooves 8.4 is provided in the clamping seat 8.1, and the through hole 8.8 is arranged parallel to the screw rod 4; a spline shaft 8.9 meshing with the upper rack 8.5 and the lower rack 8.6 is rotatably provided in the through hole 8.8; a clamping drive motor 8.10 transmission-connected to the spline shaft 8.9 is provided at the orifice at one end of the through hole 8.8, and a first torque sensor 8.11 is provided between the output end of the clamping drive motor 8.10 and the spline shaft 8.9.

[0049] The torque value detected by the first torque sensor 8.11 can detect whether the clamping head 8.3 is clamping the bearing 13, and at the same time can reduce the damage of the clamping head 8.3 to the bearing 13; the clamping drive motor 8.10 is used to drive the spline shaft 8.9 to rotate, and the spline shaft 8.9 drives the clamping drive gear to rotate during the rotation. The rotation of the clamping drive gear drives the upper rack 8.5 and the lower rack 8.6 to slide along the clamping seat 8.1. When the upper rack 8.5 and the lower rack 8.6 move relative to or away from each other, the two support rods 8.2 will be driven to move, so that the two clamping heads 8.3 and the bearing 13 are clamped or loosened.

[0050] The support rod 8.2 is any one of an oil cylinder, an electric push rod, a hydraulic rod or a telescopic cylinder section 9.

[0051] The telescopic cylinder segment 9 is composed of a plurality of cylinder segments 9.1 nested in each other, the bottom end of the innermost cylinder segment 9.1 is fixedly connected to the upper rack 8.5 or the lower rack 8.6, and a lifting drive device 10 is connected between two adjacent cylinder segments 9.1; the purpose of setting up a plurality of cylinder segments 9.1 and the lifting drive device 10 is to increase the stroke so that more types of bearings 13 can be used.

[0052] The lifting drive device 10 includes a barrel segment rack 10.1, a barrel segment driving gear 10.2, and a barrel segment motor 10.3. Among the two adjacent barrel segments 9.1, the outer wall of the barrel segment 9.1 located in the inner layer is fixed with a vertically arranged barrel segment rack 10.1, and the outer wall of the barrel segment 9.1 located in the outer layer is provided with a barrel segment notch 10.4 corresponding to the barrel segment rack 10.1, and a barrel segment motor 10.3 is fixed on the outer wall of the barrel segment 9.1 on one side of the barrel segment notch 10.4, and the output end of the barrel segment motor 10.3 is fixed with the barrel segment driving gear 10.2 through the second torque sensor 10.5, and the barrel segment driving gear 10.2 is meshed with the barrel segment rack 10.1 through the barrel segment notch 10.4. The torque value detected by the second torque sensor 10.5 can detect whether the chuck is clamped on the top of the bearing shell 13.

[0053] The scraper 5.3 includes a knife seat 5.3.1, a knife handle 5.3.2, and a knife head 5.3.3. The knife seat 5.3.1 is fixed to the outer wall of the outer sheath 5.1, the knife seat 5.3.1 is detachably connected to the knife handle 5.3.2, and the knife head 5.3.3 is fixed to the knife handle 5.3.2. The length of the knife handle 5.3.2 and the knife head 5.3.3 can be selectively adjusted according to the model of the bearing 13, and the scraper has a wide adaptability.

[0054] The outer wall of the outer sleeve 5.1 is detachably connected with a laser distance sensor 11 arranged along the radial direction of the screw 4. The function of the laser distance sensor 11 is to assist the lifting bracket 7. The distance from the laser distance sensor 11 to the axis of the screw 4 is set to L1 as a constant value, and the laser distance sensor 1111 detects that the distance L2 to the inner wall of the bearing 13 is a variable value. During the lifting process of the lifting bracket 7, when the known radius R of the bearing 13 is equal to L1 plus L2, it means that the axis of the outer sleeve 5.1 is colinear with the axis of the bearing 13, and the tool alignment is successful. After the tool alignment is successful, the lifting bracket 7 is guaranteed to remain stationary until the scraping of the bearing is completed.

[0055] The invention also includes a controller 12, the input end of which is electrically connected to the first torque sensor 8.11, the second torque sensor 10.5, and the laser distance sensor 11, and the output end of the controller 12 is electrically connected to the outer sheath drive motor 5.4, the clamping drive motor 8.10, the barrel motor 10.3, and the screw drive motor 3. The torque value of each component is displayed by the controller 12, and control buttons of each motor are set on the controller 12 to facilitate the control of the forward and reverse rotation of each motor. The device has a high degree of full automation, which can effectively reduce the labor intensity of the staff and improve work efficiency.

[0056] The specific operation process of this embodiment is as follows:

[0057] The bearing 13 is placed on the top of the clamping seat 8.1, and the clamping drive motor 8.10 is started. The clamping drive motor 8.10 drives the spline shaft 8.9 to rotate, and the spline shaft 8.9 drives the upper rack 8.5 and the lower rack 8.6 to move, so that the two clamping heads 8.3 clamp the bearing 13. When the torque value measured by the first torque sensor 8.11 reaches the standard value set manually, it proves that the clamping head 8.3 has achieved the clamping operation on both sides of the bearing 13;

[0058] The cylinder motor 10.3 is started to adjust the height of the support rod 8.2. Under the action of the second torque sensor 10.5, when the torque value measured reaches the standard value set manually, the upper surface of the bearing bush 13 is clamped.

[0059] The bearing bush 13 is moved toward the scraper device 5 by using the lifting bracket 7. The distance from the laser distance sensor 11 to the axis of the screw 4 is a fixed value of L1. The laser distance sensor 11 detects the change value of the distance L2 to the inner wall of the bearing bush 13. During the lifting process of the lifting bracket 7, when the known radius R of the bearing bush 13 is equal to L1 plus L2, it means that the axis of the outer sleeve 5.1 is in line with the axis of the bearing bush 13, and the tool setting is successful. After the tool setting is successful, the lifting bracket 7 is guaranteed to be immobile until the scraping of the bush is completed.

[0060] Replace the appropriate tool handle 5.3.2 and tool head 5.3.3 components so that the tool handle 5.3.2 and tool head 5.3.3 meet the radius requirements of the bearing bush 13, and ensure that the tool head 5.3.3 exerts a certain pressure on the bearing bush 13 to facilitate scraping and grinding the inner surface of the bearing bush 13;

[0061] The screw drive motor 3 is started, and the screw 4 is driven to rotate under the action of the screw drive motor 3. The rotation of the screw 4 drives the scraper device 5 to move forward along the guide rod 2. At the same time, the outer sheath drive motor 5.4 is started to drive the scraper 5.3 on the outer sheath 5.1 to rotate around the screw 4;

[0062] The cutter head 5.3.3 scrapes a uniform spiral wedge-shaped gap on the inner surface of the bearing bush 13. When the spiral wedge-shaped gap operation in one direction is completed;

[0063] The screw drive motor 3 is started to rotate in the reverse direction, and the outer sheath drive motor 5.4 is started to rotate in the reverse direction at the same time. After the spiral wedge-shaped gap is scraped in the reverse direction, the scraping operation is completed.

[0064] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. The precise scraping device for bearing bushing is characterized by: Support frame, guide rod, screw rod, scraper device; A horizontally arranged guide rod is fixed between the two support frames, a screw drive motor is fixed on one of the support frames, the output end of the screw drive motor is fixed with the screw arranged parallel to the guide rod, and the other end of the screw is rotatably connected to the other support frame; The scraper device comprises an outer sheath, a motor seat, a scraper, an outer sheath driving motor, and two connecting plates, each of which is provided with a ball nut threadedly connected to the screw rod, and each connecting plate is provided with a guide hole through which the guide rod slides; The motor seat is fixed between the two connecting plates, and a bearing coaxially arranged with the screw is provided on the motor seat, the inner ring of the bearing is fixedly connected to the motor seat, and the outer ring of the bearing is fixedly connected to the inner wall of the cylindrical outer sleeve; A gear ring coaxially arranged therewith is fixed on the inner wall of the outer sheath, at least one outer sheath driving motor is fixed on the motor seat, and an outer sheath driving gear meshing with the gear ring is fixed at the output end of the outer sheath driving motor; At least one scraper is fixed on the outer wall of the outer sheath.

2. The precise scraping device for bearing bushing according to claim 1, characterized in that: It also includes a base, on the top surface of which two support frames are vertically fixed, a lifting bracket is fixed on the top surface of the base between the two support frames, a bearing clamping device is fixed on the lifting bracket, and the bearing clamping device is placed directly below the scraper device.

3. The precise scraping device for bearing bushing according to claim 2, characterized in that: The bearing bush clamping device comprises a clamping seat, a support rod and a clamping head. Two clamping grooves parallel to each other are provided on the top surface of the clamping seat. The length direction of the clamping grooves is perpendicular to the axial direction of the screw rod. An upper rack and a lower rack are slidably disposed in the two clamping slide grooves, respectively, with teeth arranged opposite to each other up and down. The support rods are vertically arranged on the upper rack and the lower rack, respectively, the top ends of the support rods placed outside the clamping seat are fixedly connected to the clamping heads, and the two clamping heads are arranged opposite to each other; A through hole communicating with the two clamping slide grooves is provided in the clamping seat, and the through hole is arranged parallel to the screw rod; A spline shaft meshing with the upper rack and the lower rack is rotatably arranged in the through hole; A clamping drive motor drivingly connected to the spline shaft is provided on the opening at one end of the through hole, and a first torque sensor is provided between the output end of the clamping drive motor and the spline shaft.

4. The precise scraping device for bearing bushing according to claim 3, characterized in that: The support rod is any one of an oil cylinder, an electric push rod, a hydraulic rod or a telescopic cylinder section.

5. The precise scraping device for bearing bushing according to claim 4, characterized in that: The telescopic cylinder segment comprises a plurality of cylinder segments nested with each other, the bottom end of the innermost cylinder segment is fixedly connected to the upper rack or the lower rack, and a lifting drive device is connected between two adjacent cylinder segments; The lifting drive device includes a barrel segment rack, a barrel segment driving gear, and a barrel segment motor. Among the two adjacent barrel segments, the outer wall of the barrel segment located in the inner layer is fixed with the vertically arranged barrel segment rack, and the outer wall of the barrel segment located in the outer layer is provided with a barrel segment notch corresponding to the barrel segment rack, and the barrel segment motor is fixed on the outer wall of the barrel segment on one side of the barrel segment notch, and the output end of the barrel segment motor is fixed with the barrel segment driving gear through a second torque sensor, and the barrel segment driving gear is meshed with the barrel segment rack through the barrel segment notch.

6. The precise scraping device for bearing bushing according to claim 5, characterized in that: The scraper comprises a blade seat, a blade handle and a blade head. The blade seat is fixed to the outer wall of the outer sheath, the blade handle is detachably connected to the blade seat, and the blade head is fixed to the blade handle.

7. The precise scraping device for bearing bushing according to claim 6, characterized in that: The outer wall of the outer sheath is detachably connected with a laser distance measuring sensor arranged along the radial direction of the screw.

8. The precise scraping device for bearing bushing according to claim 7, characterized in that: It also includes a controller, the input end of the controller is electrically connected to the first torque sensor, the second torque sensor, and the laser ranging sensor, and the output end of the controller is electrically connected to the outer sheath drive motor, the clamping drive motor, the barrel motor, and the screw drive motor.

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