A ring-shaped workpiece concentricity detection tool
By introducing structures such as rotating bearings, guide seats, and push springs into the concentricity detection fixture for annular workpieces, the problem of displacement of annular workpieces during the detection process is solved, and high-precision concentricity detection is achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHONGQING BISHAN MAOYU MASCH MFG CO LTD
- Filing Date
- 2025-06-05
- Publication Date
- 2026-06-26
AI Technical Summary
In existing concentricity testing fixtures for ring-shaped workpieces, the ring-shaped workpiece is prone to displacement during the testing process, which affects the reading accuracy of the dial indicator.
A concentricity roundness testing fixture for annular workpieces was designed, including an installation component and a testing component. By setting up structures such as rotating bearings, guide seats, guide holes, guide rods, push springs, and auxiliary bearings, the fixture ensures that the annular workpiece does not shift during testing, and a dial indicator is used for accurate readings.
It effectively avoids displacement of ring-shaped workpieces during concentricity roundness detection, thus improving detection accuracy and practical value.
Smart Images
Figure CN224415989U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of testing tooling technology, specifically a tooling for testing the concentricity of annular workpieces. Background Technology
[0002] Inspection fixtures are tools or devices specifically designed to inspect and verify the dimensions, shape, position, and other characteristics of products. Ring-shaped workpiece concentricity inspection fixtures are specialized testing equipment used to detect whether the inner and outer circles of a ring-shaped part are coaxial (i.e., concentric). These fixtures typically use a dial indicator fixed to a bracket, which has two bearings for rotating the ring-shaped workpiece. One side of the ring-shaped workpiece is pressed against the dial indicator, and it rotates one or more times to record the maximum and minimum reading differences between the inner and outer circles, thereby assessing concentricity.
[0003] Based on the above, the inventors have discovered the following problems: Current concentricity testing fixtures for annular workpieces require the annular workpiece to be placed against two bearings and the dial indicator's measuring end before rotation. However, during rotation, the annular workpiece is prone to displacement, affecting the dial indicator's reading accuracy and making it inconvenient to use. Therefore, in view of this, the inventors have researched and improved upon the existing structure and its shortcomings, providing a concentricity testing fixture for annular workpieces to achieve a more practical purpose. Utility Model Content
[0004] The purpose of this invention is to provide a tooling for detecting the concentricity of annular workpieces, so as to solve the problems mentioned in the background art.
[0005] A concentricity inspection fixture for annular workpieces includes an installation assembly. The installation assembly includes a base, a detection assembly fixedly mounted on one top end of the base, and an auxiliary assembly fixedly mounted on the middle of the top end of the base. Two rotating bearings are rotatably connected to the top of the base. The auxiliary assembly includes a guide seat and two bearing seats. One and two guide holes are respectively opened on adjacent sides of the guide seat. A guide rod is inserted inside the guide hole. One end of the guide rod is fixedly connected to one side of the bearing seat. A spring groove is opened in the middle of the guide seat facing the bearing seat. A push spring is fixedly mounted inside the spring groove. One end of the push spring is fixedly connected to the bearing seat. An auxiliary bearing is rotatably connected inside the bearing seat.
[0006] By adopting the above technical solution, the setting of the detection component facilitates the detection of the concentricity of the annular workpiece. The setting of two rotating bearings facilitates the outer side of the rotating bearings to abut against the outer side of the annular workpiece, making it easy to fix the two external points of the annular workpiece, so that the rotation of the annular workpiece can be used to detect concentricity. The setting of the guide seat facilitates the fixed installation of the auxiliary component at the top center of the base. The setting of the guide hole facilitates the limiting and guiding of the sliding of the guide rod. The fixed connection of one end of the guide rod to one side of the bearing seat facilitates the guiding and limiting of the movement of the bearing seat by the sliding of the guide rod. The setting of the push spring facilitates the push spring to provide thrust, so that the auxiliary bearing pushes against the inside of the annular workpiece, so that the outer side of the rotating annular workpiece can be in close contact with the rotating bearing when rotating the annular workpiece for concentricity detection, avoiding displacement that affects the detection accuracy. The setting of the auxiliary bearing facilitates the push of the annular workpiece by the auxiliary component without hindering the rotation of the annular workpiece.
[0007] Furthermore, a guide bar is fixedly installed on the top of the bearing housing, and a guide ring is fixedly installed on the outer top of the auxiliary bearing.
[0008] By adopting the above technical solution, the guide strip and guide ring facilitate the placement of the annular workpiece between the rotating bearing and the auxiliary bearing, making it convenient to perform concentricity detection on the annular workpiece.
[0009] Furthermore, the detection component includes a dial indicator and a guide sleeve, with a sleeve on one side of the dial indicator and a probe on one end of the sleeve.
[0010] By adopting the above technical solution, the probe is set to facilitate contact between the probe and the outer side of the ring-shaped workpiece, making it convenient to detect the concentricity of the ring-shaped workpiece. The dial indicator displays the reading, and the difference between the maximum and minimum readings is used to evaluate the concentricity.
[0011] Furthermore, the bottom of the guide sleeve is fixedly connected to the base, and a sliding block is slidably connected inside the guide sleeve.
[0012] By adopting the above technical solution and setting the guide sleeve, it is convenient to limit and guide the sliding of the sliding block.
[0013] Furthermore, the sliding block is sleeved on the outside of the sleeve, and the sliding block is fixedly connected to the sleeve.
[0014] By adopting the above technical solution, the sliding block is fixedly connected to the sleeve, which facilitates the sliding of the sliding block to drive the probe to move up and down, thereby making it convenient for the device to detect the concentricity of different contour lines of the annular workpiece.
[0015] Furthermore, a ruler rod is fixedly installed at the top of one end of the sliding block, and a threaded sleeve is fixedly installed inside the other end of the sliding block.
[0016] By adopting the above technical solution, the threaded sleeve and the scale rod are designed to facilitate the up-and-down movement of the threaded sleeve, which in turn drives the sliding block and the scale rod to move up and down.
[0017] Furthermore, the threaded sleeve has a threaded rod internally connected to it, and the top and bottom ends of the threaded rod are rotatably connected to the guide sleeve and the base, respectively.
[0018] By adopting the above technical solution, the threaded rod is designed to facilitate the rotation of the threaded rod, which in turn enables the threaded sleeve to drive the sliding block to move up and down.
[0019] Furthermore, a knob is fixedly installed on the top of the threaded rod, and the knob is located at the top of the guide sleeve.
[0020] By adopting the above technical solution, the knob is designed to facilitate control of the threaded rod rotation.
[0021] Furthermore, the top of the ruler rod extends to the top of the guide sleeve, and the surface of the ruler rod is provided with graduations. By adopting the above technical solution, the graduations on the surface of the ruler rod facilitate the display of the height position of the measuring point by the part of the ruler rod extending out of the guide sleeve, which is used to display the height of the contour lines for measuring the annular workpiece.
[0022] Compared with the prior art, the beneficial effects of this utility model are as follows: The detection component facilitates the detection of the concentricity of the annular workpiece; the two rotating bearings facilitate the contact between the outer side of the rotating bearing and the outer side of the annular workpiece, allowing for easy fixation of the two outer points of the annular workpiece, enabling the rotation of the annular workpiece to detect concentricity; the guide seat facilitates the fixed installation of the auxiliary component at the top center of the base; the guide hole facilitates the limiting and guiding of the sliding of the guide rod; the fixed connection of one end of the guide rod to one side of the bearing seat facilitates the guiding and limiting of the movement of the bearing seat by the sliding of the guide rod; the push spring facilitates the provision of thrust, allowing the auxiliary bearing to push against the inside of the annular workpiece, ensuring that the outer side of the rotating workpiece is in close contact with the rotating bearing during concentricity detection, preventing displacement that could affect detection accuracy; and the auxiliary bearing ensures that the push of the auxiliary component against the inside of the annular workpiece does not obstruct its rotation. This utility model effectively prevents displacement of the annular workpiece during concentricity detection and has high practical value. Attached Figure Description
[0023] Figure 1 This is a three-dimensional structural schematic diagram of a ring-shaped workpiece concentricity roundness detection fixture according to the present invention.
[0024] Figure 2 This is a three-dimensional structural diagram of the auxiliary component of this utility model;
[0025] Figure 3 This is an exploded view of the auxiliary component of this utility model;
[0026] Figure 4 This is a three-dimensional structural diagram of the detection component of this utility model;
[0027] Figure 5 This is an exploded view of the detection component of this utility model.
[0028] In the diagram: 1. Mounting assembly; 11. Base; 12. Rotary bearing; 2. Auxiliary assembly; 21. Guide seat; 22. Bearing seat; 23. Auxiliary bearing; 24. Guide bar; 25. Guide ring; 26. Guide hole; 27. Spring groove; 28. Guide rod; 29. Push spring; 3. Detection assembly; 31. Dial indicator; 32. Guide sleeve; 33. Sleeve; 34. Probe; 35. Sliding block; 36. Threaded sleeve; 37. Scale rod; 38. Threaded rod; 39. Knob. Detailed Implementation
[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0030] Please see Figures 1-5This utility model provides a technical solution: a concentricity detection fixture for annular workpieces, including a mounting assembly 1. The mounting assembly 1 includes a base 11, and a detection assembly 3 is fixedly mounted on one end of the top of the base 11. The detection assembly 3 facilitates the detection of the concentricity of the annular workpiece. An auxiliary assembly 2 is fixedly mounted on the middle of the top of the base 11. Two rotating bearings 12 are rotatably connected to the top of the base 11. The two rotating bearings 12 facilitate the contact between the outer side of the rotating bearings 12 and the outer side of the annular workpiece, making it easy to fix the two outer points of the annular workpiece, so that the rotation of the annular workpiece can be used to detect the concentricity. The auxiliary assembly 2 includes a guide seat 21 and two bearing seats 22. The guide seat 21 facilitates the fixed mounting of the auxiliary assembly 2 on the middle of the top of the base 11. One and two guide holes 26 are respectively opened on the adjacent sides of the guide seat 21. The guide holes 26 facilitate the guidance of the guide rod 28. The guide rod 28 is inserted inside the guide hole 26 for sliding and limiting. One end of the guide rod 28 is fixedly connected to one side of the bearing seat 22. The sliding of the guide rod 28 facilitates the movement of the bearing seat 22. A spring groove 27 is opened in the middle of the side of the guide seat 21 facing the bearing seat 22. A push spring 29 is fixedly installed inside the spring groove 27. One end of the push spring 29 is fixedly connected to the bearing seat 22. The push spring 29 provides thrust, which pushes the auxiliary bearing 23 against the inside of the annular workpiece. This ensures that the outer side of the rotating annular workpiece can be in close contact with the rotating bearing 12 when the annular workpiece is rotated for concentricity detection, thus avoiding displacement that could affect the detection accuracy. The auxiliary bearing 23 is rotatably connected inside the bearing seat 22. The auxiliary bearing 23 ensures that the rotation of the annular workpiece is not hindered when the auxiliary component 2 pushes against the inside of the annular workpiece.
[0031] The bearing housing 22 is fixedly equipped with a guide bar 24, and the auxiliary bearing 23 is fixedly equipped with a guide ring 25 on its outer top. The guide bar 24 and the guide ring 25 facilitate the placement of the annular workpiece between the rotating bearing 12 and the auxiliary bearing 23, making it convenient to perform concentricity detection on the annular workpiece.
[0032] The detection component 3 includes a dial indicator 31 and a guide sleeve 32. The dial indicator 31 has a sleeve 33 on one side and a probe 34 on one end of the sleeve 33. The probe 34 is positioned so that it can be pressed against the outer side of the annular workpiece, which facilitates the detection of the concentricity of the annular workpiece. The dial indicator 31 displays the reading, and the difference between the maximum and minimum readings is used to evaluate the concentricity.
[0033] The bottom of the guide sleeve 32 is fixedly connected to the base 11, and a sliding block 35 is slidably connected inside the guide sleeve 32. The guide sleeve 32 facilitates the limiting and guiding of the sliding block 35.
[0034] The sliding block 35 is sleeved on the outside of the sleeve 33 and is fixedly connected to the sleeve 33. The fixed connection between the sliding block 35 and the sleeve 33 facilitates the sliding of the sliding block 35 to drive the probe 34 to move up and down, thereby facilitating the device to detect the concentricity of different contour lines of the annular workpiece.
[0035] Among them, a scale rod 37 is fixedly installed on the top of one end of the sliding block 35, and a threaded sleeve 36 is fixedly installed inside the other end of the sliding block 35. The threaded sleeve 36 and the scale rod 37 are arranged so that the sliding block 35 and the scale rod 37 can move up and down by moving the threaded sleeve 36.
[0036] The threaded sleeve 36 has a threaded rod 38 inside. The top and bottom ends of the threaded rod 38 are rotatably connected to the guide sleeve 32 and the base 11, respectively. The threaded rod 38 facilitates the rotation of the threaded rod 38, which enables the threaded sleeve 36 to drive the sliding block 35 to move up and down.
[0037] A knob 39 is fixedly mounted on the top of the threaded rod 38. The knob 39 is located at the top of the guide sleeve 32, facilitating the rotation of the threaded rod 38. A scale rod 37 extends to the top of the guide sleeve 32, and its surface is marked with graduations. These graduations allow the portion of the scale rod 37 extending out of the guide sleeve 32 to display the height of the measuring point, specifically the height of the contour lines for measuring the annular workpiece.
[0038] Specifically, the working principle of this concentricity detection fixture for annular workpieces is as follows: During use, the two rotating bearings 12 facilitate the contact between the outer sides of the bearings 12 and the outer side of the annular workpiece, allowing for easy fixation of the two outer points of the workpiece. This enables the rotation of the workpiece to detect concentricity. The guide seat 21 facilitates the fixed installation of the auxiliary component 2 at the top center of the base 11. The guide hole 26 facilitates the limiting and guiding of the sliding of the guide rod 28. One end of the guide rod 28 is fixedly connected to one side of the bearing seat 22, allowing the sliding of the guide rod 28 to guide and limit the movement of the bearing seat 22. The push spring 29 provides thrust, causing the auxiliary bearing 23 to push against the inside of the annular workpiece. This ensures that the outer side of the rotating workpiece remains in close contact with the rotating bearing 12 during concentricity detection, preventing displacement that could affect detection accuracy. The auxiliary bearing 23 facilitates the auxiliary component 2's contact with the inside of the annular workpiece. When the part is pushed, it does not hinder the rotation of the annular workpiece. The guide bar 24 and guide ring 25 facilitate the placement of the annular workpiece between the rotating bearing 12 and the auxiliary bearing 23, making it convenient to detect the concentricity of the annular workpiece. The knob 39 facilitates the rotation of the threaded rod 38. The rotation of the threaded rod 38 allows the threaded sleeve 36 to drive the sliding block 35 to move up and down. The threaded sleeve 36 and the scale rod 37 facilitate the up and down movement of the sliding block 35 and the scale rod 37. The scale rod 37 has a scale on its surface, allowing the part of the scale rod 37 extending out of the guide sleeve 32 to display the height position of the measuring point, which is used to display the height of the contour lines of the annular workpiece. The sliding block 35 is fixedly connected to the sleeve 33, allowing the sliding block 35 to drive the measuring head 34 to move up and down, thus facilitating the detection of the concentricity of different contour lines of the annular workpiece.
[0039] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.
Claims
1. A fixture for detecting the concentricity of a ring-shaped workpiece, characterized in that, The system includes an installation component (1), which includes a base (11). A detection component (3) is fixedly installed at one end of the top of the base (11), and an auxiliary component (2) is fixedly installed at the middle of the top of the base (11). Two rotating bearings (12) are rotatably connected to the top of the base (11). The auxiliary component (2) includes a guide seat (21) and two bearing seats (22). One and two guide holes (26) are opened on the adjacent sides of the guide seat (21). A guide rod (28) is inserted inside the guide hole (26). One end of the guide rod (28) is fixedly connected to one side of the bearing seat (22). A spring groove (27) is opened in the middle of the side of the guide seat (21) facing the bearing seat (22). A push spring (29) is fixedly installed inside the spring groove (27). One end of the push spring (29) is fixedly connected to the bearing seat (22). An auxiliary bearing (23) is rotatably connected inside the bearing seat (22).
2. The fixture for detecting the concentricity of an annular workpiece according to claim 1, characterized in that, A guide bar (24) is fixedly installed on the top of the bearing housing (22), and a guide ring (25) is fixedly installed on the top outer side of the auxiliary bearing (23).
3. The fixture for detecting the concentricity of an annular workpiece according to claim 1, characterized in that, The detection component (3) includes a dial indicator (31) and a guide sleeve (32). The dial indicator (31) has a sleeve (33) on one side and a probe (34) on one end of the sleeve (33).
4. The fixture for detecting the concentricity of an annular workpiece according to claim 3, characterized in that, The bottom of the guide sleeve (32) is fixedly connected to the base (11), and a sliding block (35) is slidably connected inside the guide sleeve (32).
5. The fixture for detecting the concentricity of an annular workpiece according to claim 4, characterized in that, The sliding block (35) is sleeved on the outside of the sleeve (33), and the sliding block (35) is fixedly connected to the sleeve (33).
6. The fixture for detecting the concentricity of an annular workpiece according to claim 5, characterized in that, A ruler rod (37) is fixedly installed at the top of one end of the sliding block (35), and a threaded sleeve (36) is fixedly installed inside the other end of the sliding block (35).
7. The fixture for detecting the concentricity of an annular workpiece according to claim 6, characterized in that, The threaded sleeve (36) has a threaded rod (38) inside, and the top and bottom ends of the threaded rod (38) are rotatably connected to the guide sleeve (32) and the base (11) respectively.
8. The fixture for detecting the concentricity of an annular workpiece according to claim 7, characterized in that, A knob (39) is fixedly installed on the top of the threaded rod (38), and the knob (39) is located at the top of the guide sleeve (32).
9. The fixture for detecting the concentricity of an annular workpiece according to claim 8, characterized in that, The top of the ruler rod (37) extends to the top of the guide sleeve (32), and the surface of the ruler rod (37) is provided with scale.