A concentricity inspection tool for the axial center hole of the outer tube of a cylindrical shaft

Abstract

The utility model discloses a concentricity inspection tool for the axis center hole of a cylindrical shaft outer tube, comprising an L-shaped plate, a measuring mechanism and a docking mechanism; a primary positioning plate is provided on the left inner wall of the L-shaped plate, and evenly distributed connecting rods are provided on the right side of the primary positioning plate, and the right ends of the four connecting rods are fixedly connected to a rotating drum, and the right end of the L-shaped plate is hinged with a right fastening plate through a pin shaft; the measuring mechanism comprises a rotating rod, a threaded column, a fixing seat, a first connecting rod and a measuring adapter seat, the rotating rod is rotatably connected to the inside of the rotating drum, the left end and the rear end of the rotating rod are fixedly connected to the threaded column, the left and right walls of the rotating drum are evenly distributed with fixing seats, the inside of the fixing seat is rotatably connected to the first connecting rod through a rotating shaft, and the other end of the first connecting rod is also rotatably connected to the measuring adapter seat through a rotating shaft; the docking mechanism is arranged on the left side wall of the right fastening plate, and the docking mechanism is fixedly connected to the measuring mechanism. The detection method of the concentricity inspection tool for the axis center hole of the cylindrical shaft outer tube is simple, and defective products can be quickly detected.

Description

Technical Field

[0001] The utility model relates to the technical field of bicycle parts, in particular to a concentricity inspection tool for an axial center hole of an outer tube of a barrel shaft. Background Art

[0002] The thru-axle of a bicycle is a wheel connection method that is locked through the hub axis. Different from the open claw hook pull rod locking, the thru-axle is thicker and larger, with a rear wheel diameter of 12mm, and the locking method is a closed fixed threaded screw-in locking method. Previously, after the outer tube of the thru-axle was processed, it was put into use after the sampling inspection was qualified. As a result, it was found that the axis hole was not concentric during the production process, and the defective products were not discovered until the last process. Therefore, a concentricity inspection fixture for the axis hole of the outer tube of the thru-axle was proposed. Utility Model Content

[0003] The technical problem to be solved by the utility model is to overcome the existing defects and provide a concentricity inspection tool for the axial center hole of the outer tube of a cylindrical shaft. The inspection method is simple and convenient, and the problems in the background technology can be effectively solved.

[0004] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions: a concentricity inspection tool for the axial center hole of the outer tube of a cylindrical shaft, comprising an L-shaped plate, a measuring mechanism and a docking mechanism;

[0005] The left inner wall of the L-shaped plate is provided with a primary positioning plate, the right side of the primary positioning plate is provided with evenly distributed connecting rods, the right ends of the four connecting rods are fixedly connected to a rotating drum, and the right end of the L-shaped plate is hinged with a right fastening plate through a pin shaft;

[0006] The measuring mechanism comprises a rotating rod, a threaded column, a fixing seat, a first connecting rod and a measuring adapter seat, wherein the rotating rod is rotatably connected to the inside of the rotating drum, the left end and the rear end of the rotating rod are fixedly connected to the threaded column, the left wall and the right wall of the rotating drum are provided with evenly distributed fixing seats, the inside of the fixing seats are rotatably connected to the first connecting rod via a rotating shaft, and the other end of the first connecting rod is also rotatably connected to the measuring adapter seat via a rotating shaft;

[0007] The docking mechanism is arranged on the left side wall of the right fastening plate, and the docking mechanism is fixedly connected to the measuring mechanism.

[0008] Furthermore, it also includes a single-chip microcomputer, which is arranged on the upper inner wall of the L-shaped plate, and the input end of the single-chip microcomputer is electrically connected to an external power supply to control the normal operation of the electrical appliance.

[0009] Furthermore, the measuring mechanism also includes a moving seat, a second connecting rod, a contact sensor and a slider, the sliders are respectively threadedly connected to the external threaded surfaces of the two threaded columns, the relative inner walls of the two sliders are provided with evenly distributed moving seats, the interior of the moving seats is also rotatably connected to the second connecting rod via a rotating shaft, the other end of the second connecting rod is also rotatably connected to the interior of a measuring adapter located at the same position via a rotating shaft, the outer side surface of the measuring adapter is provided with a contact sensor, the contact sensor is bidirectionally electrically connected to the single-chip microcomputer to realize the hole spacing of the axial center hole of the outer tube of the measuring shaft.

[0010] Furthermore, it also includes a drive motor, which is arranged on the left side wall of the L-shaped plate, the output shaft of the drive motor is fixedly connected to the left end of the left threaded column, and the input end of the drive motor is electrically connected to the output end of the single-chip microcomputer to provide driving force for measurement.

[0011] Furthermore, the docking mechanism includes a turntable, a rotating groove and a docking block. The turntable is fixedly connected to the right end of the threaded column on the right side. A rotating groove is opened on the left side wall of the right fastening plate. A docking block is inserted into the rotating groove. The left end of the docking block is fixedly connected to the right end of the turntable to realize the function of right-side support.

[0012] Furthermore, it also includes support legs, which are evenly arranged at the four corners of the bottom surface of the L-shaped plate to achieve the function of supporting the inspection fixture.

[0013] Furthermore, it also includes a handle, which is arranged on the upper end of the right side surface of the L-shaped plate to realize the function of fastening the plate on the right side of the switch.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] When it is necessary to carry out the concentricity inspection of the axial hole of the outer tube of the cylindrical shaft, the tube leg on the left side of the outer tube of the cylindrical shaft is directly inserted into the primary positioning plate. If it cannot be docked, it can be regarded as a defective product. If it can be docked, the right side fastening plate is closed by the handle, and the docking block is inserted into the inside of the rotating groove to provide support force for the right side. Then, the single-chip microcomputer can be controlled to drive the motor to rotate forward and reverse, thereby driving the two threaded columns to rotate forward and reverse relative to each other. Because the threads of the two threaded columns are in opposite directions, the slider can be driven to move relatively close or relatively far away. At this time, it is affected by the first connecting rod and the second connecting rod. The four measuring adapters located on the same side move relatively away and relatively close with the axis of the threaded column as the center. At this time, the single-chip microcomputer can be controlled to operate these contact sensors. When the four contact sensors located on the same side touch the inner wall of the tube leg of the outer tube of the barrel shaft, the contact sensors return the touch information to the single-chip microcomputer. The single-chip microcomputer receives the four contact sensors on the other side at this time. If the four contact sensors on the other side also touch the inner wall of the tube leg of the outer tube of the barrel shaft on the other side, it means that the axial center hole of the outer tube of the barrel shaft is concentric, otherwise it is not concentric and is regarded as a defective product. The detection method of the concentricity inspection fixture of the axial center hole of the outer tube of the barrel shaft is simple, and defective products can be quickly detected. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the cross-sectional structure of the measuring mechanism of the utility model;

[0018] Figure 3 This is an enlarged structural diagram of the utility model at A;

[0019] Figure 4 It is a schematic diagram of the enlarged structure of point B of the utility model.

[0020] In the figure: 1 L-type plate, 2 primary positioning plate, 3 right fastening plate, 4 rotating cylinder, 5 connecting rod, 6 measuring mechanism, 61 rotating rod, 62 threaded column, 63 fixed seat, 64 first connecting rod, 65 moving seat, 66 second connecting rod, 67 measuring adapter, 68 contact sensor, 69 slider, 7 driving motor, 8 single chip microcomputer, 9 docking mechanism, 91 turntable, 92 rotating groove, 93 docking block, 10 supporting leg, 11 handle. DETAILED DESCRIPTION

[0021] 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 in 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.

[0022] See also Figure 1-4 , This embodiment provides a technical solution: a concentricity inspection tool for the axial center hole of the outer tube of a cylindrical shaft, comprising an L-shaped plate 1, a measuring mechanism 6 and a docking mechanism 9;

[0023] Among them, a primary positioning plate 2 is provided on the left inner wall of the L-shaped plate 1, and evenly distributed connecting rods 5 are provided on the right side surface of the primary positioning plate 2. The right ends of the four connecting rods 5 are fixedly connected to a rotating drum 4, and the right end of the L-shaped plate 1 is hinged with a right fastening plate 3 through a pin shaft; it also includes a single-chip microcomputer 8, which is arranged on the upper inner wall of the L-shaped plate 1, and the input end of the single-chip microcomputer 8 is electrically connected to an external power supply; it also includes support legs 10, which are evenly arranged at the four corners of the bottom surface of the L-shaped plate 1; it also includes a handle 11, which is arranged at the upper end of the right side surface of the L-shaped plate 1.

[0024] The measuring mechanism 6 includes a rotating rod 61, a threaded column 62, a fixed seat 63, a first connecting rod 64 and a measuring adapter seat 67. The rotating rod 61 is rotatably connected to the inside of the rotating drum 4. The left end and the rear end of the rotating rod 61 are fixedly connected to the threaded column 62. The left wall and the right wall of the rotating drum 4 are evenly distributed with fixed seats 63. The inside of the fixed seat 63 is rotatably connected to the first connecting rod 64 through a rotating shaft. The other end of the first connecting rod 64 is also rotatably connected to the measuring adapter seat 67 through a rotating shaft. The measuring mechanism 6 also includes a moving seat 65, a second connecting rod 66, a contact sensor 68 and a slider 69. The slider 69 is respectively threadedly connected to the two threaded columns 6 2, the relative inner walls of the two sliders 69 are provided with evenly distributed moving seats 65, the interior of the moving seats 65 is also rotatably connected with the second connecting rod 66 through the rotating shaft, the other end of the second connecting rod 66 is also rotatably connected with the inside of the measuring adapter 67 located at the same position through the rotating shaft, the outer side surface of the measuring adapter 67 is provided with a contact sensor 68, and the contact sensor 68 is bidirectionally electrically connected with the single-chip computer 8; it also includes a driving motor 7, the driving motor 7 is arranged on the left side wall of the L-shaped plate 1, the output shaft of the driving motor 7 is fixedly connected to the left end of the threaded column 62 on the left side, and the input end of the driving motor 7 is electrically connected to the output end of the single-chip computer 8.

[0025] Among them, the docking mechanism 9 is arranged on the left side wall of the right fastening plate 3, the docking mechanism 9 is fixedly connected to the measuring mechanism 6, the docking mechanism 9 includes a turntable 91, a rotating groove 92 and a docking block 93, the turntable 91 is fixedly connected to the right end of the right threaded column 62, and a rotating groove 92 is opened on the left side wall of the right fastening plate 3, a docking block 93 is inserted into the rotating groove 92, and the left end of the docking block 93 is fixedly connected to the right end of the turntable 91.

[0026] The working principle of the utility model is as follows:

[0027] When it is necessary to carry out the inspection, the device is placed on the designated workstation through the support legs 10. At this time, the outer tube of the cylinder shaft can be inserted into the rotating drum 4. At this time, the tube leg on the left side of the outer tube of the cylinder shaft is directly inserted into the primary positioning plate 2. If it cannot be docked, it can be regarded as a defective product.

[0028] If the connection is successful, the right side fastening plate 3 is closed by the handle 11, and the docking block 93 is inserted into the inside of the rotating groove 92 to provide support force for the right side thereof. Then, the single chip microcomputer 8 can be adjusted to drive the motor 7 to operate, and the output shaft of the driving motor 7 rotates forward and reversely, thereby driving the two threaded columns 62 to rotate forward and reversely relative to each other. Because the thread directions of the two threaded columns 62 are opposite, the slider 69 can be driven to move relatively close or relatively away from each other. At this time, the four measuring adapters on the same side are affected by the first connecting rod 64 and the second connecting rod 66. The seat 67 moves relatively away and relatively close with the axis of the threaded column 62 as the center. At this time, the single-chip microcomputer 8 can be regulated, and these contact sensors 68 are in operation. When the four contact sensors 68 located on the same side touch the inner wall of the outer tube leg of the barrel shaft, the contact sensors 68 return the touch information to the single-chip microcomputer 8. The single-chip microcomputer 8 then receives the four contact sensors 68 on the other side. If the four contact sensors 68 on the other side also touch the inner wall of the outer tube leg of the barrel shaft on the other side, it means that the axial center holes of the outer tube of the barrel shaft are concentric. Otherwise, they are not concentric and are regarded as defective products.

[0029] It is worth noting that the single chip microcomputer 8 disclosed in the above embodiment is specifically model S7-200, and the contact sensor 68 and the drive motor 7 can be freely configured according to the actual application scenario. It is recommended to use the LFC-09A high-precision miniature pressure sensor for the contact sensor 68, and the drive motor 7 is recommended to use the HG-JR353 low-inertia servo motor. The single chip microcomputer 8 controls the contact sensor 68 and the drive motor 7 using methods commonly used in the prior art.

[0030] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A concentricity inspection tool for the axial center hole of a cylindrical shaft outer tube, characterized in that: It comprises an L-shaped plate (1), a measuring mechanism (6) and a docking mechanism (9); The left inner wall of the L-shaped plate (1) is provided with a primary positioning plate (2), the right side of the primary positioning plate (2) is provided with evenly distributed connecting rods (5), the right ends of the four connecting rods (5) are fixedly connected to a rotating drum (4), and the right end of the L-shaped plate (1) is hinged with a right fastening plate (3) via a pin shaft; The measuring mechanism (6) comprises a rotating rod (61), a threaded column (62), a fixing seat (63), a first connecting rod (64) and a measuring adapter seat (67); the rotating rod (61) is rotatably connected to the inside of the rotating drum (4); the left end and the rear end of the rotating rod (61) are fixedly connected to the threaded column (62); the left side wall and the right side wall of the rotating drum (4) are provided with evenly distributed fixing seats (63); the inside of the fixing seats (63) are rotatably connected to the first connecting rod (64) via a rotating shaft; the other end of the first connecting rod (64) is also rotatably connected to the measuring adapter seat (67) via a rotating shaft; The docking mechanism (9) is arranged on the left side wall of the right fastening plate (3), and the docking mechanism (9) is fixedly connected to the measuring mechanism (6).

2. A concentricity inspection tool for the axial center hole of a cylindrical shaft outer tube according to claim 1, characterized in that: It also includes a single-chip microcomputer (8), which is arranged on the upper inner wall of the L-shaped plate (1), and the input end of the single-chip microcomputer (8) is electrically connected to an external power supply.

3. A concentricity inspection tool for the axial center hole of a cylindrical shaft outer tube according to claim 1, characterized in that: The measuring mechanism (6) further comprises a movable seat (65), a second connecting rod (66), a contact sensor (68) and a slider (69), wherein the slider (69) is respectively threadedly connected to the external threaded surfaces of the two threaded columns (62), and the opposite inner side walls of the two sliders (69) are provided with evenly distributed movable seats (65), the interior of the movable seats (65) is also rotatably connected to the second connecting rod (66) via a rotating shaft, and the other end of the second connecting rod (66) is also rotatably connected to the interior of a measuring adapter seat (67) located at the same position via a rotating shaft, and the outer side surface of the measuring adapter seat (67) is provided with a contact sensor (68), and the contact sensor (68) is bidirectionally electrically connected to the single-chip computer (8).

4. A concentricity inspection tool for the axial center hole of a cylindrical shaft outer tube according to claim 1, characterized in that: It also includes a drive motor (7), which is arranged on the left side wall of the L-shaped plate (1), the output shaft of the drive motor (7) is fixedly connected to the left end of the left threaded column (62), and the input end of the drive motor (7) is electrically connected to the output end of the single-chip computer (8).

5. The concentricity inspection tool for the axial center hole of the cylindrical shaft outer tube according to claim 1, characterized in that: The docking mechanism (9) comprises a rotating disk (91), a rotating groove (92) and a docking block (93); the rotating disk (91) is fixedly connected to the right end of the right threaded column (62); a rotating groove (92) is provided on the left side wall of the right fastening plate (3); a docking block (93) is inserted into the rotating groove (92); and the left end of the docking block (93) is fixedly connected to the right end of the rotating disk (91).

6. The concentricity inspection tool for the axial center hole of the cylindrical shaft outer tube according to claim 1, characterized in that: It also comprises support legs (10), wherein the support legs (10) are evenly arranged at the four corners of the bottom surface of the L-shaped plate (1).

7. The concentricity inspection tool for the axial center hole of the cylindrical shaft outer tube according to claim 1, characterized in that: It also comprises a handle (11), wherein the handle (11) is arranged at the upper end of the right side surface of the L-shaped plate (1).

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