A device and method for measuring the height difference with precision

Abstract

This invention provides a precision height difference measurement device and method. It can fabricate two standard mandrels C based on the height difference of the eccentric plane of the eccentric shaft D. Using dial indicator assembly I9 and dial indicator assembly II10 and a reference measuring stage 6, the dial indicator assembly I9 and dial indicator assembly II10 are aligned with the two standard mandrels C to determine the height difference. Then, the machined eccentric shaft D product is placed inside. The actual height difference of the eccentric plane of the eccentric shaft D is verified using a dial indicator with the height difference set, thus confirming whether the height difference meets the drawing requirements. This detection device saves time compared to the time-consuming coordinate measuring machine (CMM) method, enabling rapid acquisition of detection values ​​and improving production efficiency.

Description

Technical Field

[0001] This invention relates to an eccentric shaft detection device, and more specifically, a height difference precision measurement device and its measurement method. Background Technology

[0002] An eccentric shaft is a component used inside an air conditioning compressor. Its main function is to drive a scroll plate to compress gas. The eccentric plane of the eccentric shaft is the main structure driving the moving and stationary scroll plates. Due to fitting requirements, the plane is generally designed with a height difference structure, and the height difference dimensions are in the micrometer range. Such micrometer-level precision height difference dimensions generally require a coordinate measuring machine (CMM) to detect. However, CMMs are expensive, time-consuming to operate, and require highly skilled personnel for inspection, resulting in high inspection costs. From a production perspective, the inability to obtain inspection results in a timely manner affects production efficiency. Summary of the Invention

[0003] To address the aforementioned technical problems, this invention provides a device and method for measuring the precision of height difference.

[0004] This invention employs the following technical solution: a precision height difference measuring device, which mainly includes a base plate, a lower base plate mounted on the base plate and fixed to the base plate, an upper turntable mounted on the lower base plate, the upper turntable being rotatably connected to the lower base plate, the upper turntable rotating on the lower base plate, a measuring platform mounted on the upper turntable, the measuring platform rotating with the upper turntable, several rows of slot seats distributed on the measuring platform, the several rows of slot seats being distributed from front to back on the measuring platform, each slot seat having a slot, the object to be measured being fixed in the slot in the horizontal direction, and a dial indicator assembly I and a dial indicator assembly II mounted on the base plate, the dial indicator assembly I and the dial indicator assembly II being ... Dial indicator assembly I and dial indicator assembly II are distributed around the periphery of the measuring platform. Dial indicator assembly I is equipped with a height-adjustable dial indicator I that can move up and down. Dial indicator assembly II is equipped with a height-adjustable dial indicator II that can also move up and down. When dial indicator assembly I needs to measure a test point on the object being measured, the height of dial indicator I is adjusted to correspond to that test point, and the height of that test point can be measured. When dial indicator assembly II needs to measure another test point on the object being measured, the height of dial indicator II is adjusted to correspond to that other test point, and the height of that test point can be measured.

[0005] Furthermore, the object being tested is a standard mandrel or an eccentric shaft.

[0006] Furthermore, the dial indicator assembly I mainly includes a support base I, on which a mounting post I is vertically mounted. A horizontal support rod I is connected to the mounting post I. One end of the support rod I is slidably connected to the mounting post I via a sliding sleeve I. A locking nut I is provided on the side of the sliding sleeve I. The locking nut I passes through a screw hole I on the sliding sleeve I and contacts the mounting post I. The dial indicator I is mounted on the other end of the support rod I. When the support rod I slides on the mounting post I via the sliding sleeve I, it can drive the dial indicator I to move up and down. When the dial indicator I is in position, the locking nut I is rotated so that the locking nut I abuts against the mounting post I, fixing the position of the support rod I, thereby fixing the position of the dial indicator I.

[0007] Furthermore, the dial indicator assembly II mainly includes a support base II, on which a mounting post II is vertically mounted. A horizontal support rod II is connected to the mounting post II. One end of the support rod II is slidably connected to the mounting post II via a sliding sleeve II. A locking nut II is provided on the side of the sliding sleeve II. The locking nut II passes through a screw hole II on the sliding sleeve II and contacts the mounting post II. The dial indicator II is mounted on the other end of the support rod II. When the support rod II slides on the mounting post II via the sliding sleeve II, it can drive the dial indicator II to move up and down. When the dial indicator II is in position, the locking nut II is rotated so that the locking nut II abuts against the mounting post II, fixing the position of the support rod II, thereby fixing the dial indicator II.

[0008] Furthermore, a bearing sleeve is fixed to the surface of the lower chassis, and a rolling bearing is installed inside the bearing sleeve. A rotating shaft is provided at the bottom of the upper turntable. The rotating shaft is located inside the rolling bearing and rotates inside the rolling bearing. The upper turntable is rotatably connected to the lower chassis through the cooperation of the rotating shaft and the rolling bearing.

[0009] Furthermore, the card slot is located in the middle of the card slot base.

[0010] This invention also discloses a method for detecting the height difference between an eccentric shaft and an eccentric plane, which includes the following steps:

[0011] S1. Take a standard mandrel and place it in the slot on the measuring table. At the same time, the small end of the standard mandrel should be aligned with the outermost slot on the measuring table to ensure that the positions of measuring points A and B on the standard mandrel are fixed. Move the height of dial indicator II up and down so that the position of dial indicator II corresponds to the position of measuring point A on the standard mandrel. When dial indicator II is in position, measure the height of measuring point A on the standard mandrel using dial indicator II and fix the position of dial indicator II by locking nut II.

[0012] S2, rotate the upper turntable to adjust the small end of the standard mandrel to near the dial indicator I of dial indicator assembly I, move the height of dial indicator I up and down, and use the dial indicator I to measure the position value of measuring point B on the standard mandrel; adjust dial indicator I to be at the same height as dial indicator II, and finally fix the position of dial indicator I by locking nut I;

[0013] S3. Remove the standard mandrel and place the eccentric shaft to be tested in the slot on the measuring table. Rotate the upper turntable to move the small end of the eccentric shaft to the vicinity of the dial indicator II head adjusted in S1. At the same time, the plane of the small end of the eccentric shaft needs to be in contact with the outermost slot on the measuring table to ensure that the positions of measuring points A and B on the eccentric shaft are fixed. Finally, use the dial indicator II adjusted in S1 to measure the height of measuring point A on the eccentric shaft.

[0014] S4. Rotate the upper turntable again to adjust the small end of the eccentric shaft to the dial indicator I. Use the dial indicator I adjusted in S2 to measure the height of measurement point B on the eccentric shaft, and then confirm the value. Finally, you can quickly obtain the height difference between measurement points A and B on the eccentric shaft.

[0015] The present invention has the following beneficial effects: By adopting the above technical solution, the present invention can manufacture two standard mandrels based on the eccentricity plane height difference of 0.003mm. The longitudinal height difference of the calibration rod diameters of the two standard mandrels is 0.003mm when compared on the same reference. The coaxiality and cylindricity of the reference diameter and calibration rod diameter of the standard mandrel are guaranteed to be within 0.0005, thus ignoring measurement errors. Using dial indicator assembly I and dial indicator assembly II and the reference measuring stage, dial indicator assembly I and dial indicator assembly II are aligned with the two standard mandrels to ensure the height difference. Then, the machined eccentric shaft product is placed in the table. The actual height difference of the eccentricity plane of the eccentric shaft is verified by using a dial indicator with the height difference set, thereby confirming whether the height difference meets the drawing requirements. This detection device saves the time-consuming three-coordinate measuring machine method, can quickly obtain detection values, and improves production efficiency. Attached Figure Description

[0016] Figure 1 is a schematic diagram of the eccentric shaft plane height difference detection device of the present invention.

[0017] Figure 2 is a schematic diagram of the standard mandrel and eccentric shaft of the present invention.

[0018] Figure 3 is an exploded view of the eccentric shaft plane height difference detection device of the present invention.

[0019] Figure 4 is a schematic diagram of the first step of the implementation of the eccentric shaft plane height difference detection device of the present invention.

[0020] Figure 5 is a schematic diagram of the second step of the implementation of the eccentric shaft plane height difference detection device of the present invention.

[0021] Figure 6 is a schematic diagram of the third step of the implementation of the eccentric shaft plane height difference detection device of the present invention.

[0022] Figure 7 is a schematic diagram of the fourth step of the implementation of the eccentric shaft plane height difference detection device of the present invention. Detailed Implementation

[0023] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby providing a clearer and more explicit definition of the scope of protection of the present invention.

[0024] In Figures 1, 2, and 3, the present invention provides a precision height difference measurement device, which mainly includes a base plate 1, on which a lower base plate 2 is mounted and fixed. In this embodiment, the lower base plate 2 is fixedly connected to the base plate 1 by bolts VII4-1, VIII4-2, and IX4-3. An upper turntable 5 is mounted on the lower base plate 2 and is rotatably connected to the lower base plate 2. The upper turntable 5 rotates on the lower base plate 2. In this embodiment, a bearing sleeve 11 is fixed to the surface of the lower base plate 2, and a rolling bearing 3 is installed inside the bearing sleeve 11. A rotating shaft 5-1 is provided at the bottom of the upper turntable 5, which is located inside the rolling bearing 3 and rotates within the rolling bearing 3. The upper turntable 5 is rotatably connected to the lower base plate 2 through the cooperation of the rotating shaft 5-1 and the rolling bearing 3. A measuring platform 6 is mounted on the upper turntable 5. As the upper turntable 5 rotates, several rows of slot seats 8 are distributed on the measuring platform 6. In this embodiment, the measuring platform 6 has four rows of slot seats 8, arranged from front to back. Screw holes are provided between every two rows of slot seats. In this embodiment, the measuring platform has a total of six screw holes. The measuring platform 6 is fixedly connected to the upper turntable 5 by inserting bolts I7-1, II7-2, III7-3, IV7-4, V7-5, and VI7-6 into these six screw holes respectively. Each slot seat 8 has a slot 8-1, located in the middle of the slot seat 8. The object to be measured is fixed horizontally within the slot 8-1. The object to be measured is a standard mandrel C or an eccentric shaft D. A dial indicator assembly I9 and a dial indicator assembly II10 are installed on the base plate 1, distributed on the measuring platform 6. The outer periphery of the micrometer assembly I9 includes a height-adjustable micrometer I9-1, which can move up and down. Similarly, the micrometer assembly II10 includes a height-adjustable micrometer II10-1, which can also move up and down. When the micrometer assembly I9 needs to measure a test point on the object being measured, the height of the micrometer I9-1 is adjusted to correspond to that test point, thus measuring its height. When the micrometer assembly II10 needs to measure another test point on the object being measured, the height of the micrometer II10-1 is adjusted to correspond to that test point, thus measuring its height. The micrometer assembly I9 mainly includes a support I9-2, on which a vertical mounting post I9-3 is provided. The mounting post I9-3 is connected to a horizontal support rod I9-4, one end of which is connected to a sliding sleeve I9-5. It is slidably connected to mounting post I9-3, and a locking nut I9-6 is provided on the side of the sliding sleeve I9-5.Locking nut I9-6 passes through the screw hole I on the sliding sleeve I9-5 and contacts the mounting post I9-3. Dial indicator I9-1 is mounted on the other end of support rod I9-4. When support rod I9-4 slides on mounting post I9-3 via sliding sleeve I9-5, it drives dial indicator I9-1 to move up and down. Once dial indicator I9-1 is in position, rotating locking nut I9-6 causes it to abut against mounting post I9-3, fixing the position of support rod I9-4 and thus fixing the position of dial indicator I9-1. The dial indicator assembly II10 mainly includes a support base II10-2, on which mounting post II10-3 is vertically mounted. Mounting post II10-3 is connected to horizontal support rod II10-4. One end of support rod II10-4 passes through sliding sleeve II10-5. The sliding sleeve II10-5 is slidably connected to the mounting post II10-3. A locking nut II10-6 is provided on the side of the sliding sleeve II10-5, passing through a screw hole II on the sliding sleeve II10-5 and contacting the mounting post II10-3. The dial indicator II10-1 is mounted on the other end of the support rod II10-4. When the support rod II10-4 slides on the mounting post II10-3 via the sliding sleeve II10-5, it drives the dial indicator II10-1 to move up and down. When the dial indicator II10-1 is in position, rotating the locking nut II10-6 causes it to abut against the mounting post II10-3, fixing the position of the support rod II10-4 and thus fixing the dial indicator II10-1.

[0025] In Figures 3, 4, 5, 6 and Figure 7 The present invention also discloses a method for measuring precise height difference, which includes the following steps:

[0026] S1. Take a standard mandrel C and place it in the slot 8-1 on the measuring table 6. At the same time, the small end plane Q of one end of the standard mandrel C should be in contact with the outermost slot 8-1 on the measuring table. The outermost slot is marked as Z. This ensures that the positions of measuring points A and B on the standard mandrel C are fixed. Move the height of the dial indicator II 10-1 up and down so that the position of the dial indicator II 10-1 corresponds to the position of measuring point A on the standard mandrel C. After the dial indicator II 10-1 is in position, measure the height of measuring point A on the standard mandrel C using the dial indicator II 10-1 and fix the position of the dial indicator II 10-1 by locking nut II 10-6.

[0027] S2, rotate the upper turntable 5 to adjust the small end of the standard mandrel C to near the dial indicator I9-1 of the dial indicator assembly I9. Move the height of dial indicator I9-1 up and down, and use the dial indicator I9-1 to measure the position value of measuring point B on the standard mandrel C. Adjust dial indicator I9-1 to be at the same height as dial indicator II10-1, and finally fix the position of dial indicator I9-1 by tightening the lock nut I9-6.

[0028] S3. Remove the standard mandrel C and place the eccentric shaft D to be tested in the slot 8-1 on the measuring table 6. Rotate the upper turntable 5 to move the small end of the eccentric shaft D to the vicinity of the dial indicator II 10-1 adjusted in S1. At the same time, the plane N of the small end of the eccentric shaft D needs to be in contact with the outermost slot 8-1 on the measuring table. The outermost slot is marked as Z. This ensures that the positions of the two measuring points A and B on the eccentric shaft D are fixed. Finally, use the dial indicator II 10-1 adjusted in S1 to measure the height of measuring point A on the eccentric shaft D.

[0029] S4. Rotate the upper turntable 5 to adjust the small end of the eccentric shaft D to the position of dial indicator I9-1. Use the dial indicator I9-1 adjusted in S2 to measure the height of measurement point B on the eccentric shaft D. Then confirm the value. Finally, the height difference between measurement points A and B on the eccentric shaft D can be quickly obtained.

[0030] This invention can produce two standard mandrels C based on the 0.003mm height difference of the eccentric plane of the eccentric shaft D. The longitudinal height difference of the two standard mandrels C is 0.003mm when compared on the same reference. The coaxiality and cylindricity of the reference diameter and the reference diameter of the standard mandrel C are guaranteed to be within 0.0005 to ignore measurement error. Using dial indicator assembly I9 and dial indicator assembly II10 and the reference measuring stage 6, the height difference of dial indicator assembly I9 and dial indicator assembly II10 is aligned with the two standard mandrels C. Then, the machined eccentric shaft D product is placed in the stage. The actual height difference of the eccentric plane of the eccentric shaft D is verified by the dial indicator with the height difference set, thereby confirming whether the height difference meets the drawing requirements.

[0031] Not limited to this, any changes or substitutions conceived without creative effort should be included within the scope of protection of this invention.

[0032] Therefore, the scope of protection of this invention should be determined by the scope defined in the claims.

Claims

1. A device for measuring a precise value of a height difference, characterized in that It mainly includes the bottom plate (1), the lower chassis (2) is installed on the bottom plate (1), the lower chassis (2) is fixed on the bottom plate (1), the upper turntable (5) is installed on the lower chassis (2), the upper turntable (5) is rotatably connected with the lower chassis (2), the upper turntable (5) rotates on the lower chassis (2), the upper turntable (5) is installed on the measuring table (6), the measuring table (6) rotates with the upper turntable (5), a plurality of rows of clamping groove seats (8) are distributed on the measuring table (6), the plurality of rows of clamping groove seats (8) are distributed from front to back on the measuring table (6), each clamping groove seat (8) is provided with a clamping groove (8-1), the measured object is fixed in the clamping groove (8-1) in the horizontal direction, the micrometer assembly I (9) and the micrometer assembly II (10) are installed on the bottom plate (1), the micrometer assembly I (9) and the micrometer assembly II (10) are distributed on the periphery of the measuring table (6), the micrometer assembly I (9) is provided with the micrometer I (9-1) with adjustable height, the micrometer I (9-1) can move up and down, the micrometer assembly II (10) is provided with the micrometer II (10-1) with adjustable height, the micrometer II (10-1) on the micrometer assembly II (10) can move up and down, when the micrometer assembly I (9) needs to measure a test point on the measured object, the height of the micrometer I (9-1) is adjusted to correspond to the test point, so that the height of the test point can be measured, when the micrometer assembly II (10) needs to measure another test point on the measured object, the height of the micrometer II (10-1) is adjusted to correspond to the other test point, so that the height of the test point can be measured, the micrometer assembly I (9) mainly includes the supporting seat I (9-2), the mounting column I (9-3) is vertically arranged on the supporting seat I (9-2), the mounting column I (9-3) is connected with the horizontal supporting rod I (9-4), one end of the supporting rod I (9-4) is sleeved on the mounting column I (9-3) through the sliding sleeve I (9-5) and is slidably connected with the mounting column I (9-3), the locking nut I (9-6) is arranged on the side surface of the sliding sleeve I (9-5), the locking nut I (9-6) passes through the screw hole I arranged on the sliding sleeve I (9-5) and is in contact with the mounting column I (9-3), the micrometer I (9-1) is installed on the other end of the supporting rod I (9-4), when the supporting rod I (9-4) slides on the mounting column I (9-3) through the sliding sleeve I (9-5), the micrometer I (9-1) can be driven to move up and down, after the micrometer I (9-1) is positioned, the locking nut I (9-6) is rotated to abut against the mounting column I (9-3), the locking nut I (9-6) fixes the position of the supporting rod I (9-4), so that the position of the micrometer I (9-1) is fixed, the surface of the lower chassis (2) is fixedly provided with the bearing sleeve (11), the rolling bearing (3) is installed in the bearing sleeve (11), the rotating shaft (5-1) is arranged at the bottom of the upper turntable (5), the rotating shaft (5-1) is located in the rolling bearing (3) and rotates in the rolling bearing (3),The upper disc (5) is rotatably connected with the lower chassis (2) through the cooperation of the rotating shaft (5-1) and the rolling bearing (3).

2. The height difference precision value measuring apparatus according to claim 1, characterized by The measured object is a standard mandrel (C) or an eccentric shaft (D).

3. The height difference precision value measuring apparatus according to claim 1, characterized by The dial gauge assembly II (10) mainly comprises a supporting seat II (10-2), a mounting column II (10-3) vertically arranged on the supporting seat II (10-2), a horizontal supporting rod II (10-4) connected to the mounting column II (10-3), one end of the supporting rod II (10-4) being in sliding connection with the mounting column II (10-3) through a sliding sleeve II (10-5) sleeved on the mounting column II (10-3), a locking nut II (10-6) being arranged on the side of the sliding sleeve II (10-5) and in contact with the mounting column II (10-3) through a threaded hole II (10-5) arranged on the sliding sleeve II (10-5), and the dial gauge II (10-1) being arranged at the other end of the supporting rod II (10-4), the supporting rod II (10-4) being capable of driving the dial gauge II (10-1) to move up and down when the supporting rod II (10-4) slides on the mounting column II (10-3) through the sliding sleeve II (10-5), the locking nut II (10-6) being capable of fixing the position of the supporting rod II (10-4) and thus fixing the dial gauge II (10-1) when the dial gauge II (10-1) is in position and the locking nut II (10-6) is rotated to abut against the mounting column II (10-3).

4. The apparatus for measuring a precise value of a height difference according to claim 1, wherein The clamping groove (8-1) is arranged at the middle position of the clamping groove seat (8).

5. The apparatus for measuring precise values of height differences according to claim 1, characterized in that The method for measuring the precise height difference value by using the height difference precise value measuring device The method comprises the following steps: S1, taking the standard mandrel (C), placing the standard mandrel (C) in the clamping groove (8-1) on the measuring table (6), and ensuring that the measuring points A and B on the standard mandrel (C) are fixed in position by abutting the small end plane (Q) at one end of the standard mandrel (C) against the outermost clamping groove (8-1) on the measuring table, moving the dial gauge II (10-1) up and down to make the dial gauge II (10-1) correspond to the measuring point A on the standard mandrel (C), and measuring the height of the measuring point A on the standard mandrel (C) by the dial gauge II (10-1) and fixing the position of the dial gauge II (10-1) by the locking nut II (10-6) when the dial gauge II (10-1) is in position; S2, rotating the upper turntable (5) to adjust the small end of the standard mandrel (C) to the vicinity of the dial gauge I (9-1) of the dial gauge assembly I (9), moving the dial gauge I (9-1) up and down to measure the position value of the measuring point B on the standard mandrel (C) by the dial gauge I (9-1), adjusting the dial gauge I (9-1) to be at the same height as the dial gauge II (10-1), and finally fixing the position of the dial gauge I (9-1) by the locking nut I (9-6); S3, remove the standard mandrel (C), the need to detect the eccentric shaft (D) placed in the measuring table (6) on the card slot (8-1) within the rotation of the upper turntable (5) will be small head to the eccentric shaft (D) S1 in the adjusted micrometer II (10-1) dial near the head, while the small head plane (N) needs to be consistent with the outermost card slot (8-1) on the measuring table, so as to ensure the measurement point A and the measurement point B on the eccentric shaft (D) two point position fixed, finally using S1 in the adjusted micrometer II (10-1) to measure the height of the measurement point A on the eccentric shaft (D); S4, rotate the upper turntable (5) again, adjust the small head of the eccentric shaft (D) to the micrometer I (9-1), use the micrometer I (9-1) adjusted in S2 to measure the height of the measurement point B on the eccentric shaft (D), then confirm the value, finally the height difference between the measurement point A and the measurement point B on the eccentric shaft (D) can be quickly obtained.

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