Measurement device for processing adjacent line of swash plate body of variable displacement automobile air condition compressor

Abstract

A variable displacement automobile air condition compressor swash plate body processing adjacent line measuring device relates to the automobile air condition compressor measuring device field, and comprises a measuring pedestal, a measuring block, a centering ball sleeve, a push-pull shaft and an elastic nut, the measuring pedestal is a basic structure body, the measuring block is radially limited and loaded on the measuring pedestal, the centering ball sleeve is a ball socket centering standard module, and the push-pull shaft is arranged on the push-pull shaft. The outer surface of the push-pull shaft is a round spherical surface, the push-pull shaft can be embedded in the ball socket of the swash plate body in a matched mode, limiting end faces are arranged at the two corresponding ends of the push-pull shaft respectively, a center shaft hole is formed between the limiting end faces, a circular truncated cone structural body is arranged at the upper end of the push-pull shaft, and the rod body penetrates through and is loaded on the centering ball sleeve. When the device is applied to production, immediate measurement of adjacent lines of the distance (H1) between a sliding plate limiting surface and a ball socket center point and the distance (H2) between a pushing plate limiting surface and the ball socket center point of a swash plate body can be realized on a production and processing site, so that the measurement and detection period is effectively shortened, and the measurement and detection efficiency and the processing and production efficiency of the swash plate body are improved.

Description

Technical Field

[0001] This utility model relates to the field of automotive air conditioning compressor measuring devices, specifically to a line measuring device for machining the swashplate of a variable displacement automotive air conditioning compressor. Background Technology

[0002] The swashplate is a crucial power drive component in the main shaft assembly of an automotive air conditioning compressor. Due to its complex structure and uneven stress distribution, high precision is required in its manufacturing. Before each batch processing run on CNC machining equipment, a calibration sample must be pre-machined. The measured structural parameters of the calibration sample are used to calibrate and correct the settings in the software used in the machining equipment, thus correcting machining errors. However, two structural parameters of the swashplate are directly related to the center point of the ball socket: the distance between the sliding plate limiting surface and the center point of the ball socket (H1), and the distance between the push plate limiting surface and the center point of the ball socket (H2). Since the center point of the ball socket on the swashplate cannot be directly calibrated, existing technologies... During the procedure, conventional measuring tools or auxiliary devices cannot be used for on-site inspection at the processing site. In actual production, test samples are usually sent to a remote testing center for measurement and testing using the coordinate measuring machine (CMM) method. During this period, the processing equipment at the production site must remain idle. Furthermore, the CMM process itself is complex, and the measurement of the distances (H1) between the sliding plate limiting surface and the center point of the ball socket, and (H2) between the push plate limiting surface and the center point of the ball socket, both involve the internal spatial positioning of the ball socket. Therefore, the measurement time is generally relatively long, resulting in low testing efficiency and increased downtime for the processing equipment. This routine downtime significantly reduces the utilization rate of the processing equipment and lowers the production efficiency of the swashplate. Therefore, it is necessary to research and develop on-site auxiliary devices for on-site inspection of the distances (H1) between the sliding plate limiting surface and the center point of the ball socket, and (H2) between the push plate limiting surface and the center point of the ball socket, to simplify the measurement procedure, shorten the measurement time, improve measurement efficiency, and solve existing technical problems. Utility Model Content

[0003] The purpose of this invention is to provide a line measurement device for the machining of swashplate of a variable displacement automotive air conditioning compressor, which enables real-time measurement of the distance (H1) between the limiting surface of the swashplate and the center point of the ball socket and the distance (H2) between the limiting surface of the push plate and the center point of the ball socket, thereby improving the measurement and inspection efficiency and the machining and production efficiency of the swashplate.

[0004] A measurement device for machining a swashplate of a variable displacement automotive air conditioning compressor includes: a measuring base, a measuring block, a centering ball sleeve, a push-pull shaft, and a tightening nut. The measuring base is a basic structure with a cylindrical cavity. The measuring block is a cylindrical wide-mouth sleeve with a stop at the bottom end, coaxially mounted on the measuring base with radial limiting to the cylindrical cavity. An internal thread is formed at the upper end of the inner cavity of the measuring block, corresponding to the external thread structure on the swashplate for connecting the slide plate. This allows the swashplate to be tested to be connected and mounted on the measuring block. A through-hole is formed at the center of the lower end face of the measuring block. The centering ball sleeve is a standard module for centering the swashplate, with an outer surface that corresponds to the standard ball-and-socket structure of the swashplate, allowing for corresponding mounting. Within the ball socket of the swashplate, corresponding ends of the centering ball sleeve are provided with mutually parallel and symmetrically arranged limiting end faces. A through central shaft hole is opened between the limiting end faces. A frustum structure with a conical inclination angle of α is provided on the upper end face of the push-pull shaft. A diameter-reducing shoulder is provided on the rod body. The lower diameter-reducing area is adapted to and sequentially inserted through the central shaft hole on the centering ball sleeve and the connecting hole on the lower end face of the measuring block. The lower end is provided with a connecting external thread. The push-pull shaft is mounted on the centering ball sleeve through the limiting fit between the limiting end face of the upper end of the centering ball sleeve and the diameter-reducing shoulder on the push-pull shaft. At the same time, it is radially limited by the connecting hole on the lower end face of the measuring block to maintain a vertical spatial state. The tightening nut is connected to the lower end of the push-pull shaft by a threaded fit, and the push-pull shaft is connected and installed on the measuring block.

[0005] The aforementioned measuring device for machining a swashplate of a variable displacement automotive air conditioning compressor further includes: an elastic element disposed within the inner cavity of the measuring block, looped around the push-pull shaft, and supported at both ends between the centering ball sleeve and the measuring block. When the loosening nut is lightly connected to the push-pull shaft, the elastic element retains space for axial elastic deformation, allowing it to elastically push the centering ball sleeve upward relative to the measuring block, thus forming a lower clearance fit structure between the centering ball sleeve and the swashplate in the ball socket of the swashplate. When the loosening nut is tightened to the push-pull shaft, the elastic element loses its space for axial elastic deformation and, constrained by the loosening nut, cannot push the centering ball sleeve upward, thus forming an upper clearance fit structure between the centering ball sleeve and the swashplate.

[0006] Preferably, a positioning rod is provided on the measuring base. The positioning rod is positioned corresponding to the measuring block. One end is hinged to the measuring base, allowing the positioning rod to flip on a vertical cross-section overlapping the central axis of the measuring block. The other end is bent towards the measuring block, with its width corresponding to the distance between the two lugs of the swashplate. When the positioning rod is fully flipped towards the measuring block, the free end can swing to the top of the measuring block and fit between the two lugs, thus circumferentially limiting the swashplate to be tested mounted on the measuring block and restricting it to an angular position to ensure detection accuracy.

[0007] Preferably, a magnetic patch is fixedly installed on the side of the positioning rod facing the measuring block. The magnetic patch can engage with the outer wall of the measuring block when the positioning rod is fully rotated towards the measuring block and is attracted to each other under the magnetic field of the magnetic patch. This stabilizes the positioning rod's limiting structure on the swashplate and improves and ensures the stability and reliability of the positioning rod's circumferential limiting of the swashplate.

[0008] The aforementioned variable displacement automotive air conditioning compressor swashplate machining line measurement device further includes: an inclined seat, the inclined seat being a support structure with an inclined bearing surface, the inclination angle of the inclined bearing surface being the same as the inclination angle of the conical surface of the truncated cone structure located at the upper end of the push-pull shaft, and the measuring base being positioned on the inclined bearing surface.

[0009] The beneficial effect of this utility model is that it provides a measurement device for machining the swashplate of a variable displacement automotive air conditioning compressor. It uses a centering ball sleeve as a standard module to calibrate the center position of the swashplate's ball socket, and a push-pull shaft as an intermediate reference body. The device uses the upper end face of the frustum structure and the uppermost normal line of the conical surface, both set on the push-pull shaft, as specific reference points. The distance A1 between the upper end face of the frustum structure and the center of the centering ball sleeve, and the distance A2 between the uppermost normal line of the conical surface and the center of the centering ball sleeve are measured in advance from the combined structure of the push-pull shaft and the centering ball sleeve. In the swashplate manufacturing process, under the structure of the H1 inspection mechanism, the height difference B1 between the upper end face of the frustum structure and the sliding plate limiting surface can be obtained by directly measuring the horizontal height of the upper end face of the frustum structure and the sliding plate limiting surface relative to the measuring platform surface. In the H2 inspection mechanism... In the structural state, the height difference B2 between the uppermost normal of the conical surface and the limiting surface of the push plate can be obtained by directly measuring the horizontal height of the uppermost normal of the conical surface and the limiting surface of the push plate relative to the measuring platform. Then, by simply calculating the differences between A1 and B1, and A2 and B2, the two structural parameters that need to be measured can be obtained: the distance between the limiting surface of the swash plate and the center point of the ball socket (H1) and the distance between the limiting surface of the push plate and the center point of the ball socket (H2). The entire measurement and inspection process can be completed on the production and processing site of the swash plate. Moreover, the measurement process is intuitive and the operation method is simple. When applied to actual production, it can realize on-line measurement, which can not only save the long-distance transmission procedure of the workpiece for inspection, but also replace the three-coordinate measurement method, effectively shorten the measurement and inspection cycle, and significantly improve the measurement and inspection efficiency and processing and production efficiency of the swash plate. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the swashplate structure and its structural parameters, including the distance (H1) between the sliding plate limiting surface and the center point of the ball socket, and the distance (H2) between the pushing plate limiting surface and the center point of the ball socket.

[0011] Figure 2 Main view of the structure for detecting the distance (H1) between the sliding plate limiting surface and the center point of the ball socket of the machining line measuring device for the swash plate body of a variable displacement automotive air conditioning compressor.

[0012] Figure 3 for Figure 2 Sectional view of section AA.

[0013] Figure 4 Top view of the structure for detecting the distance (H1) between the sliding plate limiting surface and the center point of the ball socket of the machining line measuring device for the swash plate body of a variable displacement automotive air conditioning compressor.

[0014] Figure 5 The main view of the structure for detecting the distance (H2) between the push plate limiting surface and the center point of the ball socket of the machining line measuring device for the swash plate body of a variable displacement automotive air conditioning compressor.

[0015] Figure 6 This is a schematic diagram illustrating the principle of detecting the distance (H1) between the sliding plate limiting surface and the center point of the ball socket.

[0016] Figure 7 This is a schematic diagram illustrating the principle of detecting the distance (H2) between the push plate limiting surface and the center point of the ball socket.

[0017] Among them: 1 is the measuring base, 2 is the measuring block, 3 is the centering ball sleeve, 4 is the push-pull shaft, 5 is the elastic element, 6 is the tightening nut, 7 is the positioning rod, 8 is the magnetic patch, 9 is the gasket, 10 is the swash plate, 11 is the frustum structure, and 12 is the tilting seat. Detailed Implementation

[0018] The technical solution for which protection is sought in this utility model will be described in detail below with reference to specific embodiments and accompanying drawings.

[0019] A line-of-care measuring device for machining the swashplate body of a variable displacement automotive air conditioning compressor, such as... Figures 2 to 5As shown, the device comprises a measuring base 1, a measuring block 2, a centering ball sleeve 3, a push-pull shaft 4, an elastic element 5, a tightening nut 6, a positioning rod 7, a magnetic patch 8, a washer 9, and an inclined seat 12. The measuring base 1 is a rectangular basic structure with a cylindrical through-cavity. The positioning rod 7 is hinged to the side of the device, corresponding to the opening position of the through-cavity. The positioning rod 7 is a zigzag rod bent towards the center of the through-cavity, with a width corresponding to the distance between the two lugs of the inclined plate 10. It can be flipped on a vertical section overlapping the central axis of the through-cavity and fixed on the side of the rod facing the through-cavity. The magnetic patch 8 is installed; the measuring block 2 is a cylindrical sleeve with an internal thread at the upper end and a stop at the bottom end. The outer diameter of the stop corresponds to the diameter of the through cavity on the measuring base 1. The measuring block 2 and the through cavity can be coaxially and radially limited and mounted on the measuring base 1 through the cooperation of the stop and the through cavity; the centering ball sleeve 3 is a standard module for centering the swashplate 10. Its outer surface is a circular spherical surface, and each end is provided with a parallel and symmetrically arranged limiting end face. A through central shaft hole is opened between the limiting end faces; the push-pull... A frustum structure 11 with a conical inclination angle of α is provided on the upper end face of shaft 4. A tapered shoulder is provided on the rod body. The lower tapered area is adapted to and sequentially inserted through the central shaft hole on the centering ball sleeve 3 and the connecting hole on the lower end face of the measuring block 2. The elastic element 5, which is a disc spring assembly, is fitted on the rod body in the area between the centering ball sleeve 3 and the lower end face of the measuring block 2. Gaskets 9 are respectively fitted between the disc spring assembly and the centering ball sleeve 3, and between the disc spring assembly and the lower end face of the measuring block 2. The gaskets 9 can be used to improve the position of the disc spring assembly relative to the centering ball sleeve 3 and the measuring block 2. The measuring block 2 applies an elastic force to maintain balance, and the lower end is connected to the tightening nut 6, which is located in the through cavity on the measuring base 1. The tilting seat 12 is a support structure for adjusting the tilt angle of the measuring base 1. The tilting seat 12 is provided with an tilting bearing surface and a tilting limiting surface. The tilt angle of the tilting bearing surface is the same as the tilt angle of the cone surface in the frustum structure 11. The tilting limiting surface is perpendicular to the tilting bearing surface and can cooperate to limit the measuring base 1 placed on the tilting bearing surface. The tilting seat 12 can stably support the measuring base 1.

[0020] During the machining process, the on-line measuring device for machining the swashplate of a variable displacement automotive air conditioning compressor, as described in this embodiment, is used to measure the structure of the swashplate 10. Figure 1 The distances (H1) between the sliding plate limiting surface and the center point of the ball socket and (H2) between the push plate limiting surface and the center point of the ball socket are measured and tested using the following methods:

[0021] 1. Measure and test the distance (H1) between the limiting surface of the sliding plate and the center point of the ball socket.

[0022] Place the measuring base 1 on a horizontal measuring platform. Align the measuring block 2 with the cylindrical cavity on the measuring base 1 and mount it on the measuring base 1. Place the shims 9, disc spring assembly, and shims 9 sequentially inside the inner cavity of the measuring block 2. Thread the swashplate 10 to be tested onto the upper end of the measuring block 2. Rotate and adjust the measuring block 2 so that the lugs of the swashplate 10 face the direction of the positioning rod 7. Fit the centering ball sleeve 3 into the ball socket of the swashplate 10. Insert the push-pull shaft 4 into the central shaft hole of the centering ball sleeve 3 and push... The pull shaft 4 passes sequentially through the gasket 9, the disc spring assembly, and the center hole of the gasket 9, and finally exits through the connecting hole on the lower end face of the measuring block 2 into the cylindrical cavity of the measuring base 1. A tightening nut 6 is threadedly connected to the lower end of the push-pull shaft 4. The positioning rod 7 is fully rotated towards the setting side of the measuring block 2, and the swashplate 10 is finely adjusted circumferentially. The end of the positioning rod 7 is fitted between the two lugs of the swashplate 10, axially locking the swashplate 10. After confirming that the magnetic patch 8 is tightly attracted to the measuring block 2, ... Figure 2 As shown, the assembly of the swashplate limiting surface and ball socket center point distance (H1) detection mechanism (hereinafter referred to as H1 detection mechanism) is completed; in the structural state of the H1 detection mechanism, the loosening nut 6 is first fully tightened to restrict the axial elastic deformation space of the disc spring assembly, so that the centering ball sleeve 3 and the swashplate body 10 form an upper clearance fit structure. At this time, as shown... Figure 6 As shown, a digital height gauge is used to measure the height values ​​of the upper end face of the measuring block 2 and the upper end plane of the push-pull shaft 4 relative to the measuring platform surface. The two measured height values ​​are subtracted to obtain the height difference B between the sliding plate limiting surface of the swashplate 10 and the upper end face of the push-pull shaft 4 under the lower clearance fit state. 11 Then, loosen the nut 6 to maintain a light connection with the push-pull shaft 4, releasing the constraint on the axial elastic deformation space of the disc spring assembly. The disc spring assembly can then elastically push the centering ball sleeve 3 upwards, so that the centering ball sleeve 3 and the swashplate 10 form a lower clearance fit structure. Again, use a digital height gauge to measure the height values ​​of the upper end face of the measuring block 2 and the upper end plane of the push-pull shaft 4 relative to the horizontal measuring platform surface, and calculate the height difference B between the sliding plate limiting surface of the swashplate 10 and the upper end face of the push-pull shaft 4 under the upper clearance fit state. 12 Calculate B 11 With B 12The arithmetic average between the two values ​​can be used to obtain the average height difference B1 between the sliding plate limiting surface of the swashplate 10 and the upper end surface of the push-pull shaft 4. The distance between the sliding plate limiting surface and the center point of the ball socket can be obtained by subtracting the value of B1 from the distance A1 between the upper end surface of the push-pull shaft 4 and the center point of the centering ball sleeve 3. The value of A1 is a constant value defined by the combined structure of the push-pull shaft 4 and the centering ball sleeve 3, and can be directly measured from the combined structure of the push-pull shaft 4 and the centering ball sleeve 3 before assembling the H1 detection mechanism.

[0023] 2. Measure and test the distance (H2) between the limiting surface of the push plate and the center point of the ball socket.

[0024] Furthermore, the H1 detection mechanism is placed entirely on the inclined bearing surface of the inclined seat 12 and kept stable by the inclined limiting surface, such as... Figure 5 As shown, a detection mechanism (H2 detection mechanism) is formed to detect the distance (H2) between the push plate limiting surface and the center point of the ball socket. In the structural state of the H2 detection mechanism, the uppermost normal lines of the push plate limiting surface of the swashplate 10 and the conical surface of the upper frustum structure 11 of the push-pull shaft 4 are both in a horizontal spatial state. At this time, the loosening nut 6 is first fully tightened so that the centering ball sleeve 3 and the swashplate 10 form an upper clearance fit structure, as shown. Figure 7 As shown, a digital height gauge is used to measure the height values ​​of the swashplate 10 push plate limiting surface and the highest normal line of the upper end of the push-pull shaft 4 relative to the measuring platform surface. The two measured height values ​​are subtracted to obtain the height difference B between the swashplate 10 push plate limiting surface and the highest normal line of the upper end of the push-pull shaft 4 under the lower clearance fit condition. 21 Then, loosen the nut 6 to lightly connect it to the push-pull shaft 4, so that the centering ball sleeve 3 and the swashplate 10 form a lower clearance fit structure. Again, use a digital height gauge to measure the height of the swashplate 10 push plate limiting surface and the highest normal line of the upper end of the push-pull shaft 4 relative to the measuring platform surface, and calculate the height difference B between the swashplate 10 push plate limiting surface and the highest normal line of the upper end of the push-pull shaft 4 under the upper clearance fit state. 22 Calculate B 21 With B 22 The arithmetic mean is used to obtain the average height difference B2 between the push plate limiting surface of the swash plate 10 and the highest normal line at the upper end of the push-pull shaft 4. The distance (H2) between the push plate limiting surface and the center point of the ball socket of the swash plate can be obtained by subtracting the value of B2 from the distance A2 between the highest normal line at the upper end of the push-pull shaft 4 and the centering ball sleeve 3. The value of A2 is also a constant value defined by the combination structure of the push-pull shaft 4 and the centering ball sleeve 3, and can also be directly measured from the combination structure of the push-pull shaft 4 and the centering ball sleeve 3.

[0025] During the measurement and testing of the distance (H1) between the sliding plate limiting surface and the center point of the ball socket and the distance (H2) between the push plate limiting surface and the center point of the ball socket, the values ​​B1 and B2 associated with the center position of the ball socket of the swashplate 10 are determined by loosening and tightening the nut 6 to form a lower clearance fit structure and an upper clearance fit structure between the centering ball sleeve 3 and the swashplate 10, respectively. Specifically, the lower clearance fit structure means that the centering ball sleeve 3 is tightly fitted to the upper end of the ball socket surface of the swashplate 10, while a clearance is formed at the lower end; the upper clearance fit structure means that the centering ball sleeve 3 is tightly fitted to the lower end of the ball socket surface of the swashplate 10, while a clearance is formed at the upper end. Then, the corresponding parameter values ​​B1 and B2 are measured under the lower clearance fit structure and the upper clearance fit structure states, respectively. 11 With B 12 And B 21 With B 22 Then calculate B respectively 11 With B 12 And B 21 With B 22 The average values ​​are used to obtain the values ​​of B1 and B2 respectively. The B1 and B2 values ​​obtained by the above method can correct the gap error between the centering ball sleeve 3 and the ball socket of the inclined plate body 10, improve the positioning accuracy of the midpoint of the ball socket, and fully ensure the measurement and detection accuracy of the B1 and B2 values.

Claims

1. A variable displacement automobile air conditioning compressor swash plate body processing tangent line measuring device, characterized by, The utility model relates to a kind of measuring devices, including: Measuring base (1), measuring block (2), centering ball sleeve (3), push-pull shaft (4) and loose nut (6), the measuring base (1) is the basic structure with cylindrical cavity, the measuring block (2) is the cylindrical wide-mouth sleeve body with the bottom end being provided with stopper, with the cylindrical cavity coaxial setting on the measuring base (1) is loaded on the measuring base (1) in radial limit, the connecting internal thread is opened on the inner chamber upper end of the measuring block (2), the connecting internal thread and the connecting external thread structure for connecting sliding disc on swash plate body (10) are mutually corresponding, can be corresponding cooperation the swash plate body (10) to be detected is connected and installed on the measuring block (2), through hole is opened in the center position of the lower end surface of the measuring block (2), the centering ball sleeve (3) is the standard module for the ball socket centering of the swash plate body (10), outer surface is circular spherical surface corresponding with the standard ball socket structure of the swash plate body (10), can be corresponding cooperation inlay in the ball socket of the swash plate body (10), corresponding two ends on the centering ball sleeve (3) are respectively provided with limit end face mutually parallel and symmetric, through hole is opened in the center axis hole between the limit end face, the circular truncated cone structure (11) of the taper angle α is set on the upper end face of the push-pull shaft (4), the rod body is provided with the radial shrink shoulder, lower radial shrink region is adapted and sequentially inserted through the center axis hole on the centering ball sleeve (3) and the connecting hole on the lower end surface of the measuring block (2), the push-pull shaft (4) is loaded on the centering ball sleeve (3) by the limit cooperation between the limit end face of the upper end of the centering ball sleeve (3) and the variable diameter shoulder of the push-pull shaft (4), while being kept vertical space state by the radial cooperation limit of the connecting hole on the lower end surface of the measuring block (2), the loose nut (6) is connected in the lower end of the push-pull shaft (4) with thread cooperation, and the push-pull shaft (4) is connected and installed on the measuring block (2).

2. The machining center line measuring device for swash plate of a variable displacement automotive air conditioning compressor as set forth in claim 1, characterized in that Also including: Elastic element (5), the elastic element (5) is arranged in the inner chamber of the measuring block (2), and is sleeved on the push-pull shaft (4), and both ends are supported between the centering ball sleeve (3) and the measuring block (2), when the loose nut (6) is connected on the push-pull shaft (4) with light, the elastic element (5) retains the space of axial elastic deformation, can be elastically pushed the centering ball sleeve (3) upwards relative to the measuring block (2), so that the centering ball sleeve (3) forms lower clearance fit structure with the swash plate body (10) in the ball socket of the swash plate body (10), when the loose nut (6) is connected on the push-pull shaft (4) by screwing, the elastic element (5) loses the space of axial elastic deformation, cannot push the centering ball sleeve (3) upwards by being constrained by the loose nut (6), can make the centering ball sleeve (3) and the swash plate body (10) form upper clearance fit structure.

3. The machining center line measuring device for swash plate of a variable displacement automotive air conditioning compressor as set forth in claim 2, characterized in that: The positioning rod (7) is arranged on the measuring base (1), the arrangement position of the positioning rod (7) corresponds to the measuring block (2), one end is hingedly connected with the measuring base (1), so that the positioning rod (7) can be turned on a vertical section overlapping with the central axis of the measuring block (2), the other end is bent towards the direction of the measuring block (2), the end head width corresponds to the distance between the two supporting ears of the swash plate body (10), when the positioning rod (7) is fully turned towards the measuring block (2), the end head of the free end can be turned above the measuring block (2) and can be fitted between the two supporting ears, and the swash plate body (10) to be detected installed on the measuring block (2) is circumferentially limited.

4. The machining center line measuring device for swash plate of a variable displacement automotive air conditioning compressor as set forth in claim 3, characterized in that: The magnet patch (8) is fixedly installed on the side of the rod body of the positioning rod (7) towards the direction of the measuring block (2), the magnet patch (8) can be in contact with the outer side wall of the measuring block (2) and be attracted and connected with each other in the fully turned state of the positioning rod (7) towards the direction of the measuring block (2).

5. A machining center line measuring device for swash plate of a variable displacement automotive air conditioning compressor as set forth in any one of claims 1 to 4, wherein Further comprising: an inclined seat (12), the inclined seat (12) is a support structure with an inclined bearing surface, the inclination angle of the inclined bearing surface is the same as the inclination angle of the conical surface in the circular table structure (11) arranged on the upper end of the push-pull shaft (4), and the measuring base (1) can be positioned on the inclined bearing surface.

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