A coaxiality measuring jig

Abstract

This application relates to a coaxiality measuring fixture, belonging to the field of measuring fixture technology. It includes a working base plate with a clamping station on the base plate. Two sets of coaxiality detection mechanisms are arranged on the side of the working base plate away from the clamping station. Two rotary stations are arranged between the clamping station and the coaxiality detection mechanisms, with each rotary station corresponding to one of the coaxiality detection mechanisms. Each rotary station includes a rotary base, a rotary motor, a mounting plate, and a fixing component. The rotary motor is disposed on the surface of the rotary base, and its output shaft is arranged vertically. The mounting plate is connected to the end of the output shaft of the rotary motor, and the fixing component is disposed on the surface of the mounting plate. This application improves the ease of use of fixtures for measuring the coaxiality of shaft parts.

Description

Technical Field

[0001] This application relates to the field of measuring fixture technology, and in particular to a fixture for measuring coaxiality. Background Technology

[0002] Coaxiality is a crucial form and position tolerance indicator in machining and quality control, used to control the degree of coaxiality of the measured axis on a part relative to the reference axis. For some shaft-type parts, a hole needs to be drilled in the center. The coaxiality of this center hole with the shaft-type part has a significant impact on the performance of the part. In the current method of measuring the coaxiality of the center hole of shaft-type parts, the shaft-type part is fixed with a fixture, and the operator measures the coaxiality of the center hole at one end of the shaft-type part. After the measurement is completed, the fixture needs to be removed, and the shaft-type part needs to be clamped in the opposite direction to measure the coaxiality of the center hole on the other side. This process is time-consuming and cumbersome, and therefore needs to be improved. Utility Model Content

[0003] To improve the ease of use of fixtures for measuring the coaxiality of shaft parts, this application provides a fixture for measuring coaxiality.

[0004] The coaxiality measuring fixture provided in this application adopts the following technical solution:

[0005] A coaxiality measuring fixture includes a working base plate with a clamping station on the base plate. Two sets of coaxiality detection mechanisms are arranged on the side of the working base plate away from the clamping station. Two rotary stations are arranged between the clamping station and the coaxiality detection mechanisms, and the rotary stations and the coaxiality detection mechanisms correspond one-to-one. Each rotary station includes a rotary base, a rotary motor, a mounting plate, and a fixing component. The rotary motor is disposed on the surface of the rotary base, and the output shaft of the rotary motor is arranged in a vertical direction. The mounting plate is connected to the end of the output shaft of the rotary motor, and the fixing component is disposed on the surface of the mounting plate.

[0006] Preferably, the fixing component includes a fixing seat, a plurality of fixing blocks, and a plurality of driving components. The fixing blocks and driving components are arranged in a one-to-one correspondence. The fixing seat is disposed on the surface of the mounting plate. The side wall of the fixing seat has a fastening hole for inserting shaft-like parts. The inner wall of the fastening hole has a plurality of graded grooves. The plurality of fixing blocks are disposed on the inner wall of the fastening hole and are evenly distributed along the axial direction of the fastening hole. The plurality of driving components are disposed on the outer wall of the fixing seat. The piston rod of the driving component passes through the fixing seat and is connected to the corresponding fixing block. The driving component drives the corresponding fixing block to move toward the axial direction of the fastening hole.

[0007] Preferably, the fixing seat includes a fixing part and a disassembly part, the fastening hole is formed through the fixing part, the graded groove is formed on one side wall of the disassembly part, the peripheral wall of the disassembly part is provided with external threads, the inner wall of one side of the fastening hole is provided with internal threads, and the fixing part and the disassembly part are connected by external threads and internal threads.

[0008] Preferably, a flexible pad is provided on the side of the fixing block near the axis of the fastening hole.

[0009] Preferably, a support is provided on the working base plate, a detection plate is provided at the top of the support, a plurality of light source sensors are provided on the surface of the detection plate, and a plurality of detection light sources are provided on the surface of the fixing base corresponding to the light source sensors.

[0010] Preferably, the surface of the fixing base is provided with a plurality of adjustment rails corresponding to the detection light source. The adjustment rails are arranged along the diameter direction of the fastening hole. The detection light source is slidably connected to the corresponding adjustment rail. The adjustment rails are provided with locking members for fixing the detection light source.

[0011] Preferably, the working base plate is provided with a movable plate, the movable plate is provided with a transverse moving guide rail, the transverse moving guide rail is provided along the line connecting the two rotary stations, and both rotary stations are slidably connected to the transverse moving guide rail.

[0012] Preferably, the working base plate is provided with a vertical moving guide rail, which is perpendicular to the horizontal moving guide rail, and the movable plate is slidably connected to the vertical moving guide rail.

[0013] In summary, this application includes at least one of the following beneficial technical effects:

[0014] 1. This application sets up two rotary stations. When measuring the coaxiality of the center hole of a shaft part, the shaft part is fixed on one rotary station. The rotary station causes the shaft part to rotate to face the coaxiality measuring mechanism for coaxiality measurement. After the measurement is completed, the rotary station drives the unfixed end of the shaft part to face the other rotary station, fixes the other end, and removes the original fixation of the rotary station. This enables the shaft part to be fixed on one side, thereby quickly detecting the coaxiality of the center hole on the other end.

[0015] 2. This application is equipped with a horizontal moving guide rail and a vertical moving guide rail, which can flexibly adjust the position of the rotary station, enabling the fixture of this application to measure shaft parts of different specifications. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a coaxiality measuring fixture according to an embodiment of this application.

[0017] Figure 2 yes Figure 1 A magnified view of a portion of point A in the middle.

[0018] Explanation of reference numerals in the attached drawings: 1. Working base plate; 11. Movable plate; 12. Horizontal moving guide rail; 13. Vertical moving guide rail; 2. Clamping station; 3. Coaxiality detection mechanism; 4. Rotary station; 41. Rotary base; 42. Rotary motor; 43. Mounting plate; 44. Fixing component; 441. Fixing seat; 4411. Fixing part; 4412. Disassembly part; 4413. Fastening hole; 4414. Grading groove; 442. Fixing block; 4421. Flexible pad; 443. Driving component; 5. Bracket; 51. Detection plate; 52. Light source sensor; 6. Detection light source; 61. Adjustment rail; 62. Locking component. Detailed Implementation

[0019] The following is in conjunction with the appendix Figure 1-2 This application will be described in further detail.

[0020] This application discloses a fixture for measuring coaxiality. (Refer to...) Figure 1 and Figure 2 The system includes a working base plate 1, with two clamping stations 2 on one side for workers to clamp and fix the shafts to be inspected at the clamping stations 2; two coaxiality detection mechanisms 3 are provided on the side of the working base plate 1 away from the clamping stations 2 for coaxiality detection of the center holes of the shaft parts; a vertical moving guide rail 13 is provided on the surface of the working base plate 1, which is arranged along the direction from the clamping stations 2 to the coaxiality detection mechanisms 3, and a movable plate 11 is slidably connected to the vertical moving guide rail 13. In this embodiment, a cylinder is provided to drive the movable plate 11 to slide on the vertical moving guide rail 13.

[0021] Reference Figure 1 and Figure 2 The surface of the movable plate 11 is provided with a transverse moving guide rail 12, which is perpendicular to the vertical moving guide rail 13. Two rotary stations 4 are slidably connected on the transverse moving guide rail 12. The two rotary stations 4 are symmetrically arranged with respect to the center section of the transverse moving guide rail 12. The rotary stations 4 and the coaxiality detection mechanism 3 are arranged in a one-to-one correspondence.

[0022] Reference Figure 1 and Figure 2The rotary station 4 includes a rotary base 41, a rotary motor 42, a mounting plate 43, and a fixing member 44. The rotary base 41 is slidably connected to the transverse moving guide rail 12. In this embodiment, a cylinder is used to drive the rotary base 41 to slide relative to the transverse moving guide rail 12. The rotary bases 41 on both sides can move in opposite directions under the drive of the cylinder. The rotary motor 42 is disposed on the surface of the rotary base 41. The output shaft of the rotary motor 42 is arranged in the vertical direction. The mounting plate 43 is disposed on the end wall of the output shaft of the rotary motor 42. The fixing member 44 is disposed on the surface of the mounting plate 43 for fixing shaft parts.

[0023] Reference Figure 1 and Figure 2 The fixing component 44 includes a fixing seat 441, several fixing blocks 442, and several driving components 443. The fixing blocks 442 and driving components 443 are arranged in a one-to-one correspondence. The fixing seat 441 is disposed on the surface of the mounting plate 43. The fixing seat 441 includes a fixing part 4411 and a disassembly part 4412. The fixing part 4411 has a fastening hole 4413 through it along the thickness direction. The disassembly part 4412 has a graded groove 4414 on the side facing the fastening hole 4413. The cross-section of the graded groove 4414 is a stepped shape with the diameter gradually decreasing from the outside to the inside, so as to preliminarily position shafts of different diameters. The peripheral wall of the disassembly part 4412 is provided with external threads, and the inner wall of the fastening hole 4413 is provided with internal threads. The fixing part 4411 and the disassembly part 4412 are connected by internal and external threads to facilitate the replacement of the disassembly part 4412, thereby realizing the replacement of graded grooves 4414 of different sizes.

[0024] Reference Figure 1 and Figure 2 A number of fixing blocks 442 are disposed on the inner wall of the fastening hole 4413. The fixing blocks 442 are evenly distributed along the circumferential direction of the axis of the fastening hole 4413. Each fixing block 442 is provided with a flexible pad 4421 on the side near the axis of the fastening hole 4413 to prevent damage to the surface of the shaft part. A number of driving members 443 are disposed on the outer wall of the fixing seat 441. The piston rod of the driving member 443 passes through the fixing seat 441 and is connected to the corresponding fixing block 442 to drive the fixing block 442 to move toward the axis of the fastening hole 4413, thereby achieving clamping of the part. In this embodiment, the driving member 443 is a small cylinder.

[0025] Reference Figure 1 and Figure 2A support 5 is provided on the surface of the working base plate 1. A detection plate 51 is provided at the top of the support 5. Several light source sensors 52 are provided on the surface of the detection plate 51. Several detection light sources 6 are provided on the side wall of the fixing base 441 corresponding to the light source sensors 52. Several adjustment rails 61 are provided on the surface of the fixing base 441. The adjustment rails 61 are arranged along the straight direction of the fastening hole 4413. Fasteners are provided on the adjustment rails 61. In this embodiment, the cross section of the adjustment rails 61 is U-shaped. The fasteners are screws. The detection light sources 6 are slid in the groove of the adjustment rails 61 and moved to the target location. Then, they are fixed by the fasteners.

[0026] In particular, the terms "horizontal" and "vertical" in this embodiment do not represent the actual direction of movement, but rather are limitations imposed to distinguish technical features with reference to the perspective of the accompanying drawings.

[0027] The implementation principle of a coaxiality measuring fixture according to an embodiment of this application is as follows: In the initial state, the fastening hole of the rotary station faces the clamping station. The operator inserts one end of the shaft part to be inspected into the fastening hole. Based on the diameter of the shaft part, one end of the shaft part will be clamped into the stepped structure of the corresponding size of the graded groove, achieving preliminary positioning of the shaft part. The drive unit is activated, causing the fixing block to clamp the peripheral wall of the shaft part. The rotary motor is activated, causing the shaft part to rotate at a certain angle, so that the fixing seat can face the detection plate. Based on the size of the shaft part, the position of the detection light source is adjusted, and the detection light source is activated. If each light source sensor can... If the shaft part receives light from the corresponding detection light source, it indicates that the shaft part is placed horizontally correctly; otherwise, it is not placed horizontally and needs to be readjusted. After the light source detection is completed, the rotary motor continues to rotate, causing the end of the shaft part to be tested to face the coaxiality detection mechanism. After the test is completed, the rotary motor reverses, so that the fastening holes of the two rotary stations are aligned. By moving the guide rail laterally, the position of the rotary station is adjusted so that the other end of the shaft part can be inserted into the fastening hole on the other side and fixed by the rotary station on the other side. After removing the original fixation of the rotary station, the coaxiality test of the center hole of the other end of the shaft part can be performed by the rotary motor on the other side.

[0028] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A clamp for measuring coaxiality, characterized in that: The system includes a working base plate with a clamping station. Two sets of coaxiality detection mechanisms are located on the side of the working base plate away from the clamping station. Two rotary stations are located between the clamping station and the coaxiality detection mechanisms, and each rotary station corresponds to one of the coaxiality detection mechanisms. Each rotary station includes a rotary base, a rotary motor, a mounting plate, and a fixing component. The rotary motor is located on the surface of the rotary base, and its output shaft is vertically oriented. The mounting plate is connected to the end of the output shaft of the rotary motor, and the fixing component is located on the surface of the mounting plate.

2. The coaxiality measuring fixture according to claim 1, characterized in that: The fixing component includes a fixing seat, several fixing blocks, and several driving components. The fixing blocks and driving components are arranged in a one-to-one correspondence. The fixing seat is disposed on the surface of the mounting plate. The side wall of the fixing seat has a fastening hole for inserting shaft-like parts. The inner wall of the fastening hole has several graded grooves. The fixing blocks are disposed on the inner wall of the fastening hole and are evenly distributed along the axial direction of the fastening hole. The driving components are disposed on the outer wall of the fixing seat. The piston rod of the driving component passes through the fixing seat and is connected to the corresponding fixing block. The driving component drives the corresponding fixing block to move toward the axial direction of the fastening hole.

3. A clamp for measuring coaxiality according to claim 2, characterized in that: The fixing seat includes a fixing part and a disassembly part. The fastening hole is opened through the fixing part. The graded groove is opened on one side wall of the disassembly part. The peripheral wall of the disassembly part is provided with external threads. The inner wall of one side of the fastening hole is provided with internal threads. The fixing part and the disassembly part are connected by external threads and internal threads.

4. A clamp for measuring coaxiality according to claim 2, characterized in that: A flexible pad is provided on the side of the fixing block near the axis of the fastening hole.

5. A clamp for measuring coaxiality according to claim 2, characterized in that: A bracket is provided on the working base plate, and a detection plate is provided at the top of the bracket. Several light source sensors are provided on the surface of the detection plate, and several detection light sources are provided on the surface of the fixed base corresponding to the light source sensors.

6. A clamp for measuring coaxiality according to claim 5, characterized in that: The surface of the fixed base is provided with several adjustment rails corresponding to the detection light source. The adjustment rails are arranged along the diameter direction of the fastening holes. The detection light source is slidably connected to the corresponding adjustment rail. The adjustment rails are provided with locking components for fixing the detection light source.

7. A clamp for measuring coaxiality according to claim 1, characterized in that: The working base plate is provided with a movable plate, and the movable plate is provided with a transverse moving guide rail. The transverse moving guide rail is arranged along the line connecting the two rotary stations, and both rotary stations are slidably connected to the transverse moving guide rail.

8. A clamp for measuring coaxiality according to claim 7, characterized in that: The working base plate is provided with a vertical moving guide rail, which is perpendicular to the horizontal moving guide rail. The movable plate is slidably connected to the vertical moving guide rail.

Images