A runout detector for shafts

Abstract

The utility model discloses a kind of eccentricity instruments for shaft radial runout error detection, including base and the slide rail being fixed on the upper surface of base, elastic center seat and locking center seat that can slide along slide rail are arranged on base, rotating center is rotatably connected on elastic center seat and locking center seat, and rotating center is clamped to the end of shaft;Base is also fixed with connecting seat, connecting seat is connected with the guide rod parallel to slide rail and located at the front and back of locking center seat, connecting frame is slidably connected on guide rod, three-jaw chuck that can be sleeved in the surface of shaft is fixed in the top of connecting frame, and chuck jaw clamping end of three-jaw chuck is equipped with positioning roller. By setting the three-jaw chuck coaxial with rotating center, the shaft to be measured is positioned, under the action of three positioning rollers, shaft can be straightened to the coaxial position of rotating center, at this time, the shaft rotation detection radial runout error can be identified as the influence of machining precision, avoid the installation position error to cause detection result error.

Description

Technical Field

[0001] This utility model relates to the field of shaft detection technology, specifically to a runout tester for detecting radial runout error of a shaft. Background Technology

[0002] A runout gauge is a precision measuring instrument used to measure the form and position tolerances of shaft and disc parts. It is mainly used to detect parameters such as radial runout, circular runout, and end face circular runout. In use, the runout gauge clamps and drives the part being measured to rotate through two rotating centers. The probe of the lever gauge touches the surface of the part being measured, and the radial runout error of the part can be directly measured. It is widely used in the fields of machining and manufacturing, and is especially suitable for measuring the form and position tolerances of parts such as bushings, bearings, and shafts.

[0003] In the process of using existing runout testers to detect the radial runout error of shafts, there is no measure to ensure that the shaft and the rotating tip are coaxial when positioning the shaft. If the shaft and the rotating tip are not coaxial, the shaft is destined to run out during rotation when it is fixed. If the shaft diameter machining accuracy is insufficient, the detection will also result in runout. Therefore, the runout caused by fixing the shaft will affect the runout caused by the shaft machining accuracy, resulting in error in the detection results and having shortcomings. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a runout tester for detecting radial runout error of shafts, which solves the problem of detection error caused by the lack of measures to ensure coaxiality between the shaft and the rotating tip when positioning the shaft in existing runout testers.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0006] A runout tester for detecting radial runout error of a shaft includes a base and a slide rail fixed on the upper surface of the base. The base is provided with an elastic tip seat and a locking tip seat that can slide along the slide rail. A rotating tip seat that abuts against the end of the shaft and clamps it is rotatably connected to both the elastic tip seat and the locking tip seat.

[0007] The base is also fixed with a connecting seat, and the connecting seat is connected with a guide rod located on the front and back of the locking top seat and parallel to the slide rail. A connecting frame is slidably connected to the guide rod, and a three-jaw chuck that can be sleeved on the surface of the shaft is fixed on the top of the connecting frame. The jaws of the three-jaw chuck are equipped with positioning rollers.

[0008] Preferably, the locking top seat is further provided with a threaded locking knob whose lower end is supported on the slide rail, and a rotating wheel connected to the corresponding rotating top is rotatably connected to one side of the locking top seat.

[0009] Preferably, the connecting frame is an inverted T-shaped component, and the connecting frame is slidably connected to the guide rod through an embedded sliding sleeve.

[0010] Preferably, the three-jaw chuck is coaxially arranged with the two rotating centers.

[0011] Preferably, the three-jaw chuck is a chuck with a large central hole, and a turning handle is inserted into the three-jaw chuck.

[0012] Preferably, the positioning roller is a rigid bearing, and the positioning roller is connected to the chuck via a roller frame.

[0013] Preferably, it also includes a universal joint mount mounted on the base on the back of the guide rod and the shaft, wherein a lever gauge with a probe abutting against the surface of the shaft is mounted on the universal joint mount.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] This invention uses a three-jaw chuck coaxial with the rotating tip to position the shaft to be tested. The jaws approach the shaft, allowing the positioning rollers to clamp it. Moving the three-jaw chuck left and right, the three positioning rollers help to align the shaft with the rotating tip. At this point, the radial runout error detected by the shaft rotation can be attributed to the influence of machining accuracy, avoiding errors in the test results caused by installation position errors. This improves installation accuracy and solves the problem of existing runout meters where the rotating tip does not ensure coaxiality between the shaft and the rotating tip, leading to test result errors. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This utility model Figure 1 Enlarged view of a three-jaw chuck;

[0018] Figure 3 This is a side view of the three-jaw chuck of this utility model;

[0019] Figure 4 This utility model Figure 1 Schematic diagram of the middle jaw structure.

[0020] In the diagram: 1. Base; 2. Slide rail; 3. Elastic center seat; 4. Locking center seat; 401. Threaded locking knob; 402. Rotary wheel; 5. Shaft; 6. Rotating center; 7. Connecting seat; 8. Guide rod; 9. Connecting frame; 10. Three-jaw chuck; 11. Jaw; 12. Positioning roller; 13. Sliding sleeve; 14. Turning handle; 15. Roller frame; 16. Lever gauge; 17. Universal gauge seat. Detailed Implementation

[0021] 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.

[0022] like Figure 1-4 As shown, this utility model provides a technical solution: a runout instrument for detecting radial runout error of a shaft, including a base 1 and a slide rail 2 fixed on the upper surface of the base 1, and also including a universal gauge seat 17 installed on the base 1 on the back of the guide rod 8 and the shaft 5. A lever gauge 16 with a probe abutting against the surface of the shaft 5 is installed on the universal gauge seat 17. An elastic tip seat 3 and a locking tip seat 4 that can slide along the slide rail 2 are provided on the base 1. A rotating tip 6 that abuts against the end of the shaft 5 for clamping is rotatably connected to both the elastic tip seat 3 and the locking tip seat 4.

[0023] The locking top seat 4 is also provided with a threaded locking knob 401 supported on the slide rail 2 at its lower end. After selecting the position of the locking top seat 4, tightening the threaded locking knob 401 will lock the position of the locking top seat 4. A rotating wheel 402 connected to the corresponding rotating top 6 is also rotatably connected to one side of the locking top seat 4. Rotating the rotating wheel 402 will drive the shaft 5 to rotate through the rotating top 6, and the runout of the shaft 5 can be detected by the lever gauge 16.

[0024] A connecting seat 7 is also fixed on the base 1. A guide rod 8 is connected to the connecting seat 7, which is located on the front and back of the locking top seat 4 and is parallel to the slide rail 2. A connecting frame 9 is slidably connected to the guide rod 8. The connecting frame 9 is an inverted T-shaped component, and the connecting frame 9 is slidably connected to the guide rod 8 through the embedded sliding sleeve 13. The three-jaw chuck 10 can move left and right along the guide rod 8 under the action of the connecting frame 9 and the sliding sleeve 13.

[0025] A three-jaw chuck 10 is fixed on the top of the connecting frame 9 and can be sleeved on the surface of the shaft 5. The three-jaw chuck 10 is coaxially arranged with the two rotating centers 6. The three-jaw chuck 10 is a chuck with a large central hole, and a turning handle 14 is inserted into the three-jaw chuck 10. The clamping end of the jaws 11 of the three-jaw chuck 10 is equipped with a positioning roller 12. The positioning roller 12 is a rigid bearing. The positioning roller 12 is connected to the jaws 11 through the roller frame 15. When the jaws 11 approach the shaft 5, the positioning roller 12 clamps the shaft 5. By moving the three-jaw chuck 10 left and right, the shaft 5 is straightened to the coaxial position of the rotating centers 6 under the action of the three positioning rollers 12.

[0026] Working principle:

[0027] The shaft 5 to be tested is held by the rotating tip 6. The three-jaw chuck 10, which is coaxial with the rotating tip 6, is used to position the shaft 5. The handle 14 is rotated to move the jaws 11 closer to the shaft 5, so that the positioning rollers 12 hold the shaft 5. The three-jaw chuck 10 is moved left and right repeatedly. Under the action of the three positioning rollers 12, the shaft 5 can be straightened to the coaxial position of the rotating tip 6. At this time, the radial runout error of the shaft 5 can be almost identified as the influence of machining accuracy, which greatly reduces the possibility of error in the test results caused by installation position error. Then, the handle 14 is rotated in the opposite direction to separate the positioning rollers 12 from the shaft 5. The rotating wheel 402 is rotated, and the shaft 5 can be rotated by the rotating tip 6. The probe is pressed against the lever 16 on the surface of the shaft 5 to detect the radial runout error of the shaft 5.

[0028] It should be noted that, in this document, terms such as “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0029] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A runout tester for detecting radial runout error of a shaft, comprising a base (1) and a slide rail (2) fixed to the upper surface of the base (1), wherein the base (1) is provided with an elastic tip seat (3) and a locking tip seat (4) that can slide along the slide rail (2), and a rotating tip (6) that abuts against the end of the shaft (5) for clamping is rotatably connected to both the elastic tip seat (3) and the locking tip seat (4), characterized in that: A connecting seat (7) is also fixed on the base (1). A guide rod (8) located on the front and back of the locking top seat (4) and parallel to the slide rail (2) is connected to the connecting seat (7). A connecting frame (9) is slidably connected to the guide rod (8). A three-jaw chuck (10) that can be sleeved on the surface of the shaft (5) is fixed on the top of the connecting frame (9). A positioning roller (12) is installed on the clamping end of the jaw (11) of the three-jaw chuck (10).

2. The runout tester for detecting radial runout error of a shaft according to claim 1, characterized in that: The locking top seat (4) is also provided with a threaded locking knob (401) whose lower end is supported on the slide rail (2), and a rotating wheel (402) connected to the corresponding rotating top (6) is rotatably connected to one side of the locking top seat (4).

3. The runout tester for detecting radial runout error of a shaft according to claim 1, characterized in that: The connecting frame (9) is an inverted T-shaped component, and the connecting frame (9) is slidably connected to the guide rod (8) through the embedded sliding sleeve (13).

4. The runout tester for detecting radial runout error of a shaft according to claim 1, characterized in that: The three-jaw chuck (10) is coaxially arranged with the two rotating centers (6).

5. A runout tester for detecting radial runout error of a shaft according to claim 1, characterized in that: The three-jaw chuck (10) is a chuck with a large central hole, and a turning handle (14) is inserted into the three-jaw chuck (10).

6. A runout tester for detecting radial runout error of a shaft according to claim 1, characterized in that: The positioning roller (12) is a rigid bearing, and the positioning roller (12) is connected to the claw (11) through the roller frame (15).

7. A runout tester for detecting radial runout error of a shaft according to claim 1, characterized in that: It also includes a universal gauge base (17) mounted on the base (1) on the back of the guide rod (8) and the shaft (5), wherein a lever gauge (16) with a probe abutting against the surface of the shaft (5) is mounted on the universal gauge base (17).

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