Measuring device, bearing, compressor and refrigeration equipment

Abstract

The invention provides a measuring device, a bearing, a compressor and refrigeration equipment, the measuring device comprises a measuring member, the measuring member comprises a working surface and a measuring tool, the measuring tool is arranged on the working surface, and the working surface is used for accommodating a to-be-measured member; the gas path converter comprises an output port; air inlet holes of the plurality of channels are respectively formed in the air path converter, and air outlet holes of the plurality of channels are respectively formed in the measuring tool; the detection flow path is arranged in the gas path converter, one end of the detection flow path is connected with the output port, the other end of the detection flow path is connected with the plurality of gas inlet holes, the detection flow path comprises a plurality of working positions, and under the condition that the detection flow path is switched to different working positions, the detection flow path and the plurality of gas inlet holes have different communication states; therefore, the measuring device can measure different parameters of the to-be-measured piece, the measuring time can be effectively shortened, and the labor intensity is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of detection tools, and in particular to a measuring device, a bearing, a compressor and a refrigeration device. Background Art

[0002] Currently, after bearings are processed, their inner diameter, cylindricity, and squareness need to be measured. Only qualified products can enter the next process. In related technologies, this is generally done using two measuring tools. Specifically, one measuring tool measures the inner diameter and cylindricity of the bearing, while the other measures the squareness of the bearing. However, this measurement method requires two separate measurements on two measuring tools, which is time-consuming and labor-intensive. Summary of the Invention

[0003] The embodiments of the present invention aim to solve at least one of the technical problems existing in the prior art.

[0004] To this end, a first aspect of an embodiment of the present invention provides a measuring device.

[0005] A second aspect of an embodiment of the present invention provides a bearing.

[0006] A third aspect of an embodiment of the present invention provides a compressor.

[0007] A fourth aspect of the embodiments of the present invention provides a refrigeration device.

[0008] In view of this, according to a first aspect of an embodiment of the present invention, a measuring device is provided, which includes: a measuring piece, the measuring piece includes a working surface and a measuring tool, the measuring tool is arranged on the working surface, and the working surface is used to accommodate the piece to be measured; an air path converter, the air path converter includes an output port; multiple channels, the air inlets of the multiple channels are respectively arranged on the air path converter, and the air outlets of the multiple channels are respectively arranged on the measuring tool; a detection flow path, arranged inside the air path converter, one end of the detection flow path is connected to the output port, and the other end of the detection flow path is connected to the multiple air inlets, the detection flow path includes multiple working positions, and when the detection flow path is switched to different working positions, the detection flow path has different connectivity states with the multiple air inlets, so that the measuring device can measure different parameters of the piece to be measured.

[0009] The measuring device provided in an embodiment of the present invention includes a measuring member, a gas path converter, multiple channels, and a detection flow path. Specifically, the measuring member includes a working surface, wherein the working surface is used to accommodate a part to be measured, optionally including a bearing. Because the measuring tool is disposed on the working surface, when it is necessary to measure bearing parameters (such as the bearing's inner diameter, cylindricity, or squareness), the bearing is placed outside the measuring tool and placed on the working surface.

[0010] Since the air inlet of each channel is set on the air path converter, the air outlet of each channel is set on the measuring tool, and the two ends of the detection flow path are respectively connected to the output port of the air path converter and multiple air inlets, it can be understood that the output port can be used to connect to the analysis equipment to output the parameter detection results of the bearing.

[0011] Specifically, a bearing sleeve is mounted on a measuring tool and placed on a working surface. An air path converter is activated, and the detection flow path within the air path converter is controlled to be in a first working position among a plurality of working positions. When the detection flow path is in the first working position, the detection flow path communicates with a portion of the plurality of air inlets (a first communication state), causing air to be discharged from a corresponding portion of the air outlets on the measuring tool, thereby detecting a first parameter of the bearing. After the first parameter detection is completed, the detection flow path within the air path converter is controlled to switch to a second working position among a plurality of working positions. When the detection flow path is in the second working position, the detection flow path communicates with a remaining portion of the plurality of air inlets (a second communication state), causing air to be discharged from a corresponding portion of the air outlets on the measuring tool, thereby detecting a second parameter of the bearing. Optionally, the first parameter includes the inner diameter and cylindricity of the bearing, and the second parameter includes the squareness of the bearing.

[0012] That is to say, by switching the working position of the detection flow path inside the air path converter through a measuring device, the measurement of different parameters of the test piece can be realized, that is, when the detection flow path is in the first working position, the inner diameter and cylindricity of the bearing can be measured, and when the detection flow path is in the second working position, the straightness of the bearing can be measured. That is, by switching the connection state of the detection flow path with multiple air inlet holes, the measurement of the three parameters of the bearing inner diameter, cylindricity and straightness can be realized. Compared with the related technology of using two measuring tools to measure the three parameters, while realizing the accurate measurement of the three parameters of the bearing inner diameter, cylindricity and straightness, it can effectively reduce the measurement time and reduce the labor intensity.

[0013] In some technical solutions, optionally, the multiple channels include a first channel, a second channel, a third channel and a fourth channel, and along the radial direction of the measuring tool, the first air outlet of the first channel and the second air outlet of the second channel are relatively arranged, and the third air outlet of the third channel and the fourth air outlet of the fourth channel are relatively arranged, and along the axial direction of the measuring tool, the first air outlet and the fourth air outlet are relatively arranged, and the second air outlet and the third air outlet are relatively arranged; wherein, the detection flow path includes a first detection flow path and a second detection flow path, and the multiple working positions include a first working position and a second working position, based on the detection flow path being in the first working position, the first detection flow path connects the first air inlet of the first channel and the second air inlet of the second channel, and the second detection flow path connects the third air inlet of the third channel and the fourth air inlet of the fourth channel; based on the detection flow path being in the second working position, the first detection flow path connects the first air inlet and the third air inlet, and the second detection flow path connects the second air inlet and the fourth air inlet.

[0014] In this technical solution, one of the measuring methods is defined, in which the number of channels is four, namely the first channel, the second channel, the third channel and the fourth channel. Since the air outlets of the channels are arranged on the measuring tool, that is, the first air outlet of the first channel, the second air outlet of the second channel, the third air outlet of the third channel and the fourth air outlet of the fourth channel are respectively arranged on the measuring tool, and the first air outlet and the second air outlet are radially opposite to each other, the third air outlet and the fourth air outlet are radially opposite to each other, the first air outlet and the fourth air outlet are axially opposite to each other, and the second air outlet and the third air outlet are axially opposite to each other, that is, the first air outlet and the third air outlet are two air outlets on a diagonal line, and the second air outlet and the fourth air outlet are two air outlets on another diagonal line.

[0015] When measuring the inner diameter and cylindricity of the bearing, the detection flow path is switched to the first working position, the first detection flow path connects the first air inlet of the first channel and the second air inlet of the second channel, the second detection flow path connects the third air inlet of the third channel and the fourth air inlet of the fourth channel, that is, the first detection flow path corresponds to the first air outlet and the second air outlet on the measuring tool, and the second detection flow path corresponds to the third air outlet and the fourth air outlet on the measuring tool. Since the first air outlet and the second air outlet are radially opposite, and the third air outlet and the fourth air outlet are radially opposite, the measurement of the inner diameter and cylindricity of the bearing can be achieved.

[0016] When measuring the straightness of the bearing, the detection flow path switches to the second working position, the first detection flow path connects the first air inlet and the third air inlet, and the second detection flow path connects the second air inlet and the fourth air inlet. That is to say, the first detection flow path corresponds to the first air outlet and the third air outlet on the measuring tool, and the second detection flow path corresponds to the second air outlet and the fourth air outlet on the measuring tool. Since the first air outlet and the third air outlet are two air outlets on a diagonal line, and the second air outlet and the fourth air outlet are two air outlets on another diagonal line, the measurement of the straightness of the bearing can be realized.

[0017] By switching the connectivity between the detection flow path and multiple air inlet holes, the bearing's inner diameter, cylindricity, and squareness can be measured. Compared to the related art of using two measuring instruments to measure the three parameters, this method can effectively reduce measurement time and labor intensity while achieving accurate measurement of the three parameters.

[0018] Furthermore, because the first and second air outlets are located on the same cross-section of the measuring tool, and the third and fourth air outlets are located on separate cross-sections, when measuring the bearing's inner diameter, cylindricity, and squareness, two parameters, namely, inner diameter and cylindricity, and two parameters, squareness, can be obtained. The bearing can be rotated 90° relative to the measuring tool before re-measurement of the inner diameter, cylindricity, and squareness, improving the accuracy of bearing parameter measurements.

[0019] In some technical solutions, optionally, the output port includes a first output port and a second output port, the first detection flow path includes a first branch, a second branch, a third branch and a fourth branch, the first branch, the second branch, the third branch and the fourth branch are respectively connected to the first output port, the second detection flow path includes a fifth branch, a sixth branch, a seventh branch and an eighth branch, the fifth branch, the sixth branch, the seventh branch and the eighth branch are respectively connected to the second output port; wherein, based on the detection flow path being in the first working position, the first branch is connected to the first air inlet, the second branch is connected to the second air inlet, the fifth branch is connected to the third air inlet, and the sixth branch is connected to the fourth air inlet; based on the detection flow path being in the second working position, the third branch is connected to the first air inlet, the fourth branch is connected to the third air inlet, the seventh branch is connected to the second air inlet, and the eighth branch is connected to the fourth air inlet.

[0020] In this technical solution, the first detection flow path includes four branches: the first branch, the second branch, the third branch, and the fourth branch. The second detection flow path includes four branches: the fifth branch, the sixth branch, the seventh branch, and the eighth branch. Each channel connects two branches. Specifically, the first air inlet of the first channel connects the first branch and the third branch, the second air inlet of the second channel connects the second branch and the seventh branch, the third air inlet of the third channel connects the fourth branch and the fifth branch, and the fourth air inlet of the fourth channel connects the sixth branch and the eighth branch.

[0021] Specifically, when measuring the inner diameter and cylindricity of a bearing, the detection flow path switches to the first working position. At this point, the first branch connects to the first air inlet, the second branch connects to the second air inlet, the fifth branch connects to the third air inlet, and the sixth branch connects to the fourth air inlet. In other words, the path formed by the third branch and the first air inlet is blocked, the path formed by the fourth branch and the third air inlet is blocked, the path formed by the seventh branch and the second air inlet is blocked, and the path formed by the eighth branch and the fourth air inlet is blocked. In other words, the first detection flow path corresponds to the first and second air outlets on the measuring tool, and the second detection flow path corresponds to the third and fourth air outlets on the measuring tool. Since the first and second air outlets are radially opposite, and the third and fourth air outlets are radially opposite, the bearing inner diameter and cylindricity can be measured.

[0022] When measuring the bearing's squareness, the detection flow path switches to the second working position. At this point, the third branch connects to the first air inlet, the fourth branch connects to the third air inlet, the seventh branch connects to the second air inlet, and the eighth branch connects to the fourth air inlet. In other words, the path formed by the first branch and the first air inlet is blocked, the path formed by the fifth branch and the third air inlet is blocked, the path formed by the second branch and the second air inlet is blocked, and the path formed by the sixth branch and the fourth air inlet is blocked. In other words, the first detection flow path corresponds to the first and third air outlets on the measuring tool, and the second detection flow path corresponds to the second and fourth air outlets on the measuring tool. Since the first and third air outlets are diagonally aligned, and the second and fourth air outlets are aligned on another diagonal, bearing squareness can be measured.

[0023] By switching the connection status between the detection flow path and multiple air inlet holes, the three parameters of the bearing inner diameter, cylindricity and squareness can be measured, which can effectively reduce the measurement time and reduce the labor intensity.

[0024] In some technical solutions, optionally, the multiple channels include a first channel, a second channel, a third channel, a fourth channel, a fifth channel, a sixth channel, a seventh channel and an eighth channel, and the first air outlet of the first channel, the second air outlet of the second channel, the third air outlet of the third channel and the fourth air outlet of the fourth channel are arranged along the circumferential direction of the measuring tool, and along the radial direction of the measuring tool, the first air outlet and the second air outlet are arranged opposite to each other, and the third air outlet and the fourth air outlet are arranged opposite to each other, and the fifth air outlet of the fifth channel, the sixth air outlet of the sixth channel, the seventh air outlet of the seventh channel and the eighth air outlet of the eighth channel are arranged along the circumferential direction of the measuring tool, and along the radial direction of the measuring tool, the fifth air outlet and the sixth air outlet are arranged opposite to each other, and the seventh air outlet and the eighth air outlet are arranged opposite to each other, and along the axial direction of the measuring tool, the first air outlet and the fifth air outlet are arranged opposite to each other, the second air outlet and the sixth air outlet are arranged opposite to each other, the third air outlet and the seventh air outlet are arranged opposite to each other, and the fourth air outlet The hole is arranged opposite to the eighth air outlet; wherein, the detection flow path includes a first detection flow path, a second detection flow path, a third detection flow path and a fourth detection flow path, and the multiple working positions include a first working position and a second working position. Based on the detection flow path being in the first working position, the first detection flow path is connected to the first air inlet hole of the first channel and the second air inlet hole of the second channel, the second detection flow path is connected to the third air inlet hole of the third channel and the fourth air inlet hole of the fourth channel, the third detection flow path is connected to the fifth air inlet hole of the fifth channel and the sixth air inlet hole of the sixth channel, and the fourth detection flow path is connected to the seventh air inlet hole of the seventh channel and the eighth air inlet hole of the eighth channel; based on the detection flow path being in the second working position, the first detection flow path is connected to the first air inlet hole and the sixth air inlet hole, the second detection flow path is connected to the second air inlet hole and the fifth air inlet hole, the third detection flow path is connected to the third air inlet hole and the eighth air inlet hole, and the fourth detection flow path is connected to the fourth air inlet hole and the seventh air inlet hole.

[0025] In this technical solution, another measuring method is defined, in which the number of channels is eight, namely, the first channel, the second channel, the third channel, the fourth channel, the fifth channel, the sixth channel, the seventh channel and the eighth channel. Since the air outlets of the channels are arranged on the measuring tool, that is, the first air outlet of the first channel, the second air outlet of the second channel, the third air outlet of the third channel, the fourth air outlet of the fourth channel, the fifth air outlet of the fifth channel, the sixth air outlet of the sixth channel, the seventh air outlet of the seventh channel and the eighth air outlet of the eighth channel are respectively arranged on the measuring tool, and the first air outlet, the second air outlet, the third air outlet and the fourth air outlet are arranged along the circumference of the measuring tool, that is, the first air outlet, the second air outlet, the third air outlet and the fourth air outlet are four air outlets on the same cross-section of the measuring tool, and the first air outlet and the second air outlet are radially opposite, and the third air outlet and the fourth air outlet are radially opposite.

[0026] The fifth air outlet, the sixth air outlet, the seventh air outlet and the eighth air outlet are arranged along the circumference of the measuring tool, that is, the fifth air outlet, the sixth air outlet, the seventh air outlet and the eighth air outlet are four air outlets on another cross section of the measuring tool, and the fifth air outlet and the sixth air outlet are radially opposite, the seventh air outlet and the eighth air outlet are radially opposite, and the first air outlet and the fifth air outlet are axially opposite, the second air outlet and the sixth air outlet are axially opposite, the third air outlet and the seventh air outlet are axially opposite, and the fourth air outlet and the eighth air outlet are axially opposite, that is, the first air outlet and the sixth air outlet are two air outlets on a diagonal line, the second air outlet and the fifth air outlet are two air outlets on a diagonal line, the third air outlet and the eighth air outlet are two air outlets on a diagonal line, and the fourth air outlet and the seventh air outlet are two air outlets on a diagonal line.

[0027] When measuring the inner diameter and cylindricity of a bearing, the detection flow path switches to the first working position. The first detection flow path connects the first air inlet of the first channel and the second air inlet of the second channel. The second detection flow path connects the third air inlet of the third channel and the fourth air inlet of the fourth channel. The third detection flow path connects the fifth air inlet of the fifth channel and the sixth air inlet of the sixth channel. The fourth detection flow path connects the seventh air inlet of the seventh channel and the eighth air inlet of the eighth channel. In other words, the first detection flow path corresponds to the first and second air outlet holes on the measuring tool, the second detection flow path corresponds to the third and fourth air outlet holes on the measuring tool, the third detection flow path corresponds to the fifth and sixth air outlet holes on the measuring tool, and the fourth detection flow path corresponds to the seventh and eighth air outlet holes on the measuring tool. Since the first and second air outlet holes are radially opposite, the third and fourth air outlet holes are radially opposite, the fifth and sixth air outlet holes are radially opposite, and the seventh and eighth air outlet holes are radially opposite, the bearing inner diameter and cylindricity can be measured.

[0028] When measuring the squareness of the bearing, the detection flow path switches to the second working position. The first detection flow path connects the first air inlet and the sixth air inlet, the second detection flow path connects the second air inlet and the fifth air inlet, the third detection flow path connects the third air inlet and the eighth air inlet, and the fourth detection flow path connects the fourth air inlet and the seventh air inlet. In other words, the first detection flow path corresponds to the first air outlet and the sixth air outlet on the measuring tool, the second detection flow path corresponds to the second air outlet and the fifth air outlet on the measuring tool, the third detection flow path corresponds to the third air outlet and the eighth air outlet on the measuring tool, and the fourth detection flow path corresponds to the fourth air outlet and the seventh air outlet on the measuring tool. Since the first air outlet and the sixth air outlet are two air outlets on a diagonal line, the second air outlet and the fifth air outlet are two air outlets on a diagonal line, the third air outlet and the eighth air outlet are two air outlets on a diagonal line, and the fourth air outlet and the seventh air outlet are two air outlets on a diagonal line, the bearing squareness can be measured.

[0029] By switching the connectivity between the detection flow path and multiple air inlet holes, the bearing's inner diameter, cylindricity, and squareness can be measured. Compared to the related art of using two measuring instruments to measure the three parameters, this method can effectively reduce measurement time and labor intensity while achieving accurate measurement of the three parameters.

[0030] In addition, by setting up eight channels, the measurement of the inner diameter, cylindricity and squareness of the four bearing parameters can be realized, which is conducive to improving the accuracy of bearing parameter measurement, further saving the time of measuring a single bearing parameter, and further reducing labor intensity.

[0031] In some technical solutions, optionally, the output port includes a first output port, a second output port, a third output port and a fourth output port, the first detection flow path includes a first branch, a second branch, a third branch and a fourth branch, the first branch, the second branch, the third branch and the fourth branch are respectively connected to the first output port, the second detection flow path includes a fifth branch, a sixth branch, a seventh branch and an eighth branch, the fifth branch, the sixth branch, the seventh branch and the eighth branch are respectively connected to the second output port, the third detection flow path includes a ninth branch, a tenth branch, an eleventh branch and a twelfth branch, the ninth branch, the tenth branch, the eleventh branch and the twelfth branch are respectively connected to the third output port, the fourth detection flow path includes a thirteenth branch, a fourteenth branch, a fifteenth branch and a sixteenth branch, the thirteenth branch, the tenth branch, the eleventh branch and the twelfth branch are respectively connected to the third output port, The fourteenth branch, the fifteenth branch and the sixteenth branch are respectively connected to the fourth output port; wherein, based on the detection flow path being in the first working position, the first branch is connected to the first air inlet, the second branch is connected to the second air inlet, the fifth branch is connected to the third air inlet, the sixth branch is connected to the fourth air inlet, the ninth branch is connected to the fifth air inlet, the tenth branch is connected to the sixth air inlet, the thirteenth branch is connected to the seventh air inlet, and the fourteenth branch is connected to the eighth air inlet; based on the detection flow path being in the second working position, the third branch is connected to the first air inlet, the fourth branch is connected to the sixth air inlet, the seventh branch is connected to the second air inlet, the eighth branch is connected to the fifth air inlet, the eleventh branch is connected to the third air inlet, the twelfth branch is connected to the eighth air inlet, the fifteenth branch is connected to the fourth air inlet, and the sixteenth branch is connected to the seventh air inlet.

[0032] In this technical solution, the first detection flow path includes four branches, namely the first branch, the second branch, the third branch and the fourth branch; the second detection flow path includes four branches, namely the fifth branch, the sixth branch, the seventh branch and the eighth branch; the third detection flow path includes four branches, namely the ninth branch, the tenth branch, the eleventh branch and the twelfth branch; and the fourth detection flow path includes four branches, namely the thirteenth branch, the fourteenth branch, the fifteenth branch and the sixteenth branch.

[0033] Each channel connects two branches, specifically, the first air inlet of the first channel connects the first branch and the third branch, the second air inlet of the second channel connects the second branch and the seventh branch, the third air inlet of the third channel connects the fifth branch and the eleventh branch, the fourth air inlet of the fourth channel connects the sixth branch and the fifteenth branch, the fifth air inlet of the fifth channel connects the eighth branch and the ninth branch, the sixth air inlet of the sixth channel connects the fourth branch and the tenth branch, the seventh air inlet of the seventh channel connects the thirteenth branch and the sixteenth branch, and the eighth air inlet of the eighth channel connects the twelfth branch and the fourteenth branch.

[0034] Specifically, when the inner diameter and cylindricity of the bearing are measured, the detection flow path is switched to the first working position. At this time, the first branch is connected to the first air inlet hole, the second branch is connected to the second air inlet hole, the fifth branch is connected to the third air inlet hole, the sixth branch is connected to the fourth air inlet hole, the ninth branch is connected to the fifth air inlet hole, the tenth branch is connected to the sixth air inlet hole, the thirteenth branch is connected to the seventh air inlet hole, and the fourteenth branch is connected to the eighth air inlet hole. That is to say, the passage formed by the third branch and the first air inlet hole is cut off, the passage formed by the fourth branch and the sixth air inlet hole is cut off, the passage formed by the seventh branch and the second air inlet hole is cut off, the passage formed by the eighth branch and the fifth air inlet hole is cut off, the passage formed by the eleventh branch and the third air inlet hole is cut off, the passage formed by the twelfth branch and the eighth air inlet hole is cut off, the passage formed by the fifteenth branch and the fourth air inlet hole is cut off, and the passage formed by the sixteenth branch and the seventh air inlet hole is cut off. Specifically, the first detection channel corresponds to the first and second air outlets on the measuring tool, the second detection channel corresponds to the third and fourth air outlets, the third detection channel corresponds to the fifth and sixth air outlets, and the fourth detection channel corresponds to the seventh and eighth air outlets. Because the first and second air outlets are radially opposite, the third and fourth air outlets are radially opposite, the fifth and sixth air outlets are radially opposite, and the seventh and eighth air outlets are radially opposite, the bearing inner diameter and cylindricity can be measured.

[0035] When the straightness of the bearing is measured, the detection flow path is switched to the second working position. At this time, the third branch is connected to the first air inlet hole, the fourth branch is connected to the sixth air inlet hole, the seventh branch is connected to the second air inlet hole, the eighth branch is connected to the fifth air inlet hole, the eleventh branch is connected to the third air inlet hole, the twelfth branch is connected to the eighth air inlet hole, the fifteenth branch is connected to the fourth air inlet hole, and the sixteenth branch is connected to the seventh air inlet hole. That is to say, the passage formed by the first branch and the first air inlet hole is cut off, the passage formed by the second branch and the second air inlet hole is cut off, the passage formed by the fifth branch and the third air inlet hole is cut off, the passage formed by the sixth branch and the fourth air inlet hole is cut off, the passage formed by the ninth branch and the fifth air inlet hole is cut off, the passage formed by the tenth branch and the sixth air inlet hole is cut off, the passage formed by the thirteenth branch and the seventh air inlet hole is cut off, and the passage formed by the fourteenth branch and the eighth air inlet hole is cut off. That is, the first detection flow path corresponds to the first and sixth air outlets on the measuring tool, the second detection flow path corresponds to the second and fifth air outlets on the measuring tool, the third detection flow path corresponds to the third and eighth air outlets on the measuring tool, and the fourth detection flow path corresponds to the fourth and seventh air outlets on the measuring tool. Because the first and sixth air outlets are two air outlets on a diagonal line, the second and fifth air outlets are two air outlets on a diagonal line, the third and eighth air outlets are two air outlets on a diagonal line, and the fourth and seventh air outlets are two air outlets on a diagonal line, the bearing squareness can be measured.

[0036] By switching the connection status between the detection flow path and multiple air inlet holes, the three parameters of the bearing inner diameter, cylindricity and squareness can be measured, which can effectively reduce the measurement time and reduce the labor intensity.

[0037] In some technical solutions, optionally, the measuring device further includes a switch module, which is provided in the detection flow path and is used to switch the detection flow path to different working positions.

[0038] In this technical solution, it is defined that the measuring device also includes a switch module. Specifically, the switch module is arranged on the detection flow path. By controlling the working state of the switch module, the detection flow path can be switched to different working positions, thereby switching the connection state between the detection flow path and multiple air inlet holes, thereby realizing the measurement of the three parameters of the bearing inner diameter, cylindricity and straightness. Compared with the related technology of using two measuring tools to measure the three parameters, while realizing the accurate measurement of the three parameters of the bearing inner diameter, cylindricity and straightness, it can effectively reduce the measurement time and reduce the labor intensity.

[0039] Optionally, the switch module includes a solenoid valve or a one-way valve.

[0040] In some technical solutions, optionally, the central axis of the measuring tool is perpendicular to the working surface.

[0041] In this technical solution, since the working surface is used to accommodate the workpiece to be measured, the central axis of the measuring tool is perpendicular to the working surface, which can improve the accuracy of parameter detection of the workpiece to be measured.

[0042] In some technical solutions, optionally, the measuring device further includes a protective member, which is provided at an end of the measuring tool away from the working surface and is connected to the measuring tool.

[0043] In this technical solution, it is defined that the measuring device also includes a protective part. It can be understood that when measuring the parameters of a bearing (part to be measured), the bearing needs to be placed on the measuring tool. After the measurement is completed, the bearing needs to be removed from the measuring tool. In the process of measuring a large number of bearings, a large number of bearings need to be placed on and removed from the measuring tool respectively. During this process, the bearing is prone to contact with the end of the measuring tool, resulting in serious wear on the end of the measuring tool, affecting the service life of the measuring tool.

[0044] By arranging a protective piece at the end of the measuring tool away from the working surface, the end of the measuring tool can be protected, thereby reducing the wear of the measuring tool during the measurement of bearing parameters and extending the service life of the measuring tool.

[0045] Optionally, the protective element comprises a plastic element.

[0046] In some technical solutions, optionally, the measuring device further includes a positioning structure, and the positioning structure is provided on the working surface.

[0047] In this technical solution, it is defined that the measuring device also includes a positioning structure. Specifically, the positioning structure is arranged on the working surface. When measuring the bearing, the bearing can be positioned, which is beneficial to improving the measurement efficiency of the bearing and further saving measurement time.

[0048] Optionally, the positioning structure includes a plurality of positioning parts, which are arranged at intervals along the circumference of the measuring tool, so as to achieve rapid positioning during the installation of the bearing and reduce time consumption.

[0049] Optionally, along the axial direction of the measuring tool, the end face of the positioning structure is higher than the working surface. When the workpiece to be measured is placed, the workpiece to be measured contacts the positioning structure, which can reduce the contact area between the workpiece to be measured and the working surface, thereby reducing the wear of the bearing during the measurement process.

[0050] In some technical solutions, optionally, the measuring piece also includes a support frame, a support platform and a mounting plate, wherein the support platform is arranged on the support frame, a working surface is provided on the side of the support platform away from the support frame, the mounting plate is arranged on the side of the support frame away from the support platform, and the mounting plate is provided with multiple interfaces; each of the multiple channels includes two sub-channels, one end of one sub-channel includes an air inlet, and the other end is connected to an interface, and one end of the other sub-channel includes an air outlet, and the other end is connected to an interface.

[0051] In this technical solution, it is defined that the measuring piece also includes a support frame, a support platform and a mounting plate. Specifically, the support platform and the mounting plate are respectively located on opposite sides of the support frame, and the support platform is provided with a working surface, that is, the measuring tool is arranged on the support platform. Since the working surface is used to accommodate the piece to be measured, the support platform can provide reliable support for the piece to be measured.

[0052] Multiple interfaces are provided on the mounting plate. One end of one sub-channel of each channel is an air inlet and the other end is connected to the interface. One end of another sub-channel is an air outlet and the other end is connected to the interface.

[0053] Optionally, the measuring device includes multiple hoses, the multiple hoses include a first hose and a second hose, the two ends of the first hose are respectively connected to the air inlet and the interface, the two ends of the second hose are respectively connected to the air outlet and the interface, and the air inlet, the interface, the air outlet, the inner wall of the first hose and the inner wall of the second hose form one of the channels.

[0054] In some technical solutions, optionally, the support platform includes a first support plate and a second support plate, wherein the first support plate is arranged on the support frame, the second support plate is arranged on the side of the first support plate facing away from the support frame, and a working surface is provided on the side of the second support plate facing away from the first support plate; the hardness of the second support plate is greater than the hardness of the first support plate.

[0055] In this technical solution, it is defined that the support platform includes a first support plate and a second support plate. Specifically, the first support plate is arranged on the support frame, and the second support plate is arranged on the first support plate, wherein the second support plate includes a working surface.

[0056] Since the hardness of the second support plate is greater than that of the first support plate, that is, the support plate provided with the working surface has a greater hardness, the wear of the second support plate can be reduced during the bearing parameter measurement process, so that the working surface and the central axis of the measuring tool remain perpendicular, which is beneficial to improving the measurement accuracy of the bearing parameters and extending the service life of the measuring part.

[0057] Optionally, the second support plate is a tungsten steel plate, and the first support plate is 45# steel.

[0058] In some technical solutions, optionally, the support frame includes a main body and multiple legs, wherein, along the axial direction of the measuring tool, the support platform and the mounting plate are respectively located on both sides of the main body, and the multiple legs are arranged on the side of the main body away from the support platform, so that the mounting plate is suspended on the side away from the main body.

[0059] In this technical solution, it is defined that the support frame includes a main body and multiple legs. Specifically, the multiple legs are arranged on the side of the main body away from the support platform to provide support and to suspend the mounting plate to facilitate the connection of the hose.

[0060] According to a second aspect of the present invention, a bearing is provided, the parameters of which are measured by a measuring device provided by any of the above technical solutions, thereby having all the beneficial technical effects of the measuring device, which will not be described in detail here.

[0061] According to a third aspect of the present invention, a compressor is provided, comprising a bearing provided by any of the above technical solutions, thereby having all the beneficial technical effects of the bearing, which will not be repeated here.

[0062] According to a fourth aspect of the present invention, a refrigeration device is provided, comprising a bearing or a compressor as provided by any of the above technical solutions, thereby having all the beneficial technical effects of the bearing or the compressor, which will not be repeated here.

[0063] Additional aspects and advantages of the present invention will be set forth in part in the following description and, in part, will be obvious from the following description, or may be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0064] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments with reference to the accompanying drawings, in which:

[0065] Figure 1 It shows one of the structural schematic diagrams of a measuring piece according to one embodiment of the present invention;

[0066] Figure 2 A schematic structural diagram of a gas path converter according to an embodiment of the present invention is shown;

[0067] Figure 3 A diagram showing a corresponding relationship between detection flow paths and channels according to an embodiment of the present invention is shown;

[0068] Figure 4 shows a corresponding relationship diagram between detection flow paths and channels according to another embodiment of the present invention;

[0069] Figure 5 A second structural schematic diagram of a measuring component according to an embodiment of the present invention is shown;

[0070] Figure 6 A schematic structural diagram of a ring gauge according to an embodiment of the present invention is shown.

[0071] in, Figures 1 to 6 The corresponding relationship between the reference numerals and component names is as follows:

[0072] 100 measuring piece, 110 working surface, 120 measuring tool, 130 supporting frame, 131 main body, 132 supporting legs, 140 supporting platform, 141 first supporting plate, 142 second supporting plate, 150 mounting plate, 151 interface, 200 gas path converter, 210 first detection flow path, 211 first output port, 212 first branch, 213 second branch, 214 third branch, 215 fourth branch, 220 second detection flow path, 221 second output port, 222 fifth branch, 223 sixth branch, 224 seventh branch, 225 eighth branch, 230 third detection flow path, 231 third output port, 232 ninth branch, 233 tenth branch, 234 eleventh branch, 235 twelfth branch, 240 fourth detection flow path, 241 fourth output port, 242 thirteenth branch, 243 fourteenth branch, 2 44 The fifteenth branch, 245 The sixteenth branch, 250 The first indicator light, 260 The second indicator light, 270 The detection flow path, 280 The output port, 300 The channel, 310 The first channel, 311 The first air outlet, 312 The first air inlet, 320 The second channel, 321 The second air outlet, 322 The second air inlet, 330 The third channel, 331 The third air outlet, 332 The third air inlet, 340 The fourth channel, 342 The fourth air inlet, 350 The fifth channel, 351 The fifth air outlet, 352 The fifth air inlet, 360 The sixth channel, 361 The sixth air outlet, 362 The sixth air inlet, 370 The seventh channel, 371 The seventh air outlet, 372 The seventh air inlet, 380 The eighth channel, 382 The eighth air inlet, 400 The central axis, 500 The protective part, 600 The positioning structure, 700 The ring gauge, 710 The knurling. DETAILED DESCRIPTION

[0073] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, in the absence of conflict, the embodiments of the present application and the features therein can be combined with each other.

[0074] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0075] Refer to the following Figures 1 to 6 The measuring device, bearing, compressor and refrigeration equipment provided according to some embodiments of the present invention are described.

[0076] In one embodiment according to the present application, Figure 1 、 Figure 2 and Figure 5As shown, a measuring device is proposed, which includes: a measuring piece 100, the measuring piece 100 includes a working surface 110 and a measuring tool 120, the measuring tool 120 is arranged on the working surface 110, and the working surface 110 is used to accommodate the piece to be measured; an air path converter 200, the air path converter 200 includes an output port 280; a plurality of channels 300, the air inlets of the plurality of channels 300 are respectively arranged on the air path converter 200, and the air outlets of the plurality of channels 300 are respectively arranged on the measuring tool 120; a detection flow path 270, which is arranged inside the air path converter 200, one end of the detection flow path 270 is connected to the output port 280, and the other end of the detection flow path 270 is connected to the plurality of air inlets, and the detection flow path 270 includes a plurality of working positions. When the detection flow path 270 is switched to different working positions, the detection flow path 270 has different connection states with the plurality of air inlets, so that the measuring device can measure different parameters of the piece to be measured.

[0077] The measuring device provided in an embodiment of the present invention includes a measuring member 100, an air path converter 200, a plurality of channels 300, and a detection flow path 270. Specifically, the measuring member 100 includes a working surface 110, wherein the working surface 110 is used to accommodate a part to be measured, optionally including a bearing. Since a measuring tool 120 is disposed on the working surface 110, when it is necessary to measure the parameters of the bearing (such as the inner diameter, cylindricity, or squareness of the bearing), the bearing is placed outside the measuring tool 120 and placed on the working surface 110.

[0078] Since the air inlet of each channel 300 is set on the air path converter 200, the air outlet of each channel 300 is set on the measuring tool 120, and the two ends of the detection flow path 270 are respectively connected to the output port 280 of the air path converter 200 and multiple air inlets, it can be understood that the output port 280 can be used to connect to the analysis equipment to output the parameter detection results of the bearing.

[0079] Specifically, a bearing sleeve is mounted on a measuring tool 120 and placed on a work surface 110. The gas flow switch 200 is activated, and a detection flow path 270 within the gas flow switch 200 is controlled to be in a first working position among multiple working positions. When the detection flow path 270 is in the first working position, the detection flow path 270 communicates with a portion of the multiple air inlets (a first communication state), causing air to be discharged from a corresponding portion of the air outlets on the measuring tool 120, thereby detecting a first parameter of the bearing. After the first parameter detection is completed, the detection flow path 270 within the gas flow switch 200 is controlled to switch to a second working position among the multiple working positions. When the detection flow path 270 is in the second working position, the detection flow path 270 communicates with a remaining portion of the multiple air inlets (a second communication state), causing air to be discharged from a corresponding portion of the air outlets on the measuring tool 120, thereby detecting a second parameter of the bearing. Optionally, the first parameter includes the inner diameter and cylindricity of the bearing, and the second parameter includes the squareness of the bearing.

[0080] That is to say, by switching the working position of the detection flow path 270 inside the air path converter 200 through a measuring device, the measurement of different parameters of the test piece can be realized, that is, when the detection flow path 270 is in the first working position, the inner diameter and cylindricity of the bearing can be measured, and when the detection flow path 270 is in the second working position, the straightness of the bearing can be measured. That is, by switching the connection state of the detection flow path 270 with multiple air inlet holes, the measurement of the three parameters of the bearing inner diameter, cylindricity and straightness can be realized. Compared with the related technology of using two measuring tools to measure the three parameters, while realizing the accurate measurement of the three parameters of the bearing inner diameter, cylindricity and straightness, it can effectively reduce the measurement time and reduce the labor intensity.

[0081] like Figure 3 As shown, in some embodiments, optionally, the plurality of channels 300 include a first channel 310, a second channel 320, a third channel 330, and a fourth channel 340. Along the radial direction of the measuring tool 120, the first air outlet 311 of the first channel 310 and the second air outlet 321 of the second channel 320 are arranged oppositely, the third air outlet 331 of the third channel 330 and the fourth air outlet 340 are arranged oppositely, and along the axial direction of the measuring tool 120, the first air outlet 311 and the fourth air outlet are arranged oppositely, and the second air outlet 321 and the third air outlet 331 are arranged oppositely; wherein the detection flow path 270 includes the first detection flow path 210 and the second detection flow path 270. The detection flow path 220 has multiple working positions including a first working position and a second working position. Based on the detection flow path 270 being in the first working position, the first detection flow path 210 is connected to the first air inlet hole 312 of the first channel 310 and the second air inlet hole 322 of the second channel 320, and the second detection flow path 220 is connected to the third air inlet hole 332 of the third channel 330 and the fourth air inlet hole 342 of the fourth channel 340; based on the detection flow path 270 being in the second working position, the first detection flow path 210 is connected to the first air inlet hole 312 and the third air inlet hole 332, and the second detection flow path 220 is connected to the second air inlet hole 322 and the fourth air inlet hole 342.

[0082] In this embodiment, one measurement method is defined, in which the number of channels 300 is four, namely, a first channel 310, a second channel 320, a third channel 330 and a fourth channel 340. Since the air outlets of the channels 300 are arranged on the measuring tool 120, that is, the first air outlet 311 of the first channel 310, the second air outlet 321 of the second channel 320, the third air outlet 331 of the third channel 330 and the fourth air outlet 340 are respectively arranged on the measuring tool 120, and the first air outlet 311 and the second air outlet 321 are radially opposite to each other, the third air outlet 331 and the fourth air outlet are radially opposite to each other, the first air outlet 311 and the fourth air outlet are axially opposite to each other, and the second air outlet 321 and the third air outlet 331 are axially opposite to each other, that is, the first air outlet 311 and the third air outlet 331 are two air outlets on a diagonal line, and the second air outlet 321 and the fourth air outlet are two air outlets on another diagonal line.

[0083] When measuring the inner diameter and cylindricity of the bearing, the detection flow path 270 switches to the first working position, the first detection flow path 210 connects the first air inlet 312 of the first channel 310 and the second air inlet 322 of the second channel 320, and the second detection flow path 220 connects the third air inlet 332 of the third channel 330 and the fourth air inlet 342 of the fourth channel 340. That is to say, the first detection flow path 210 corresponds to the first air outlet 311 and the second air outlet 321 on the measuring tool 120, and the second detection flow path 220 corresponds to the third air outlet 331 and the fourth air outlet on the measuring tool 120. Since the first air outlet 311 and the second air outlet 321 are radially opposite, and the third air outlet 331 and the fourth air outlet are radially opposite, the measurement of the inner diameter and cylindricity of the bearing can be achieved.

[0084] When measuring the straightness of the bearing, the detection flow path 270 switches to the second working position, the first detection flow path 210 connects the first air inlet 312 and the third air inlet 332, and the second detection flow path 220 connects the second air inlet and the fourth air inlet 342. That is to say, the first detection flow path 210 corresponds to the first air outlet 311 and the third air outlet 331 on the measuring tool 120, and the second detection flow path 220 corresponds to the second air outlet 321 and the fourth air outlet on the measuring tool 120. Since the first air outlet 311 and the third air outlet 331 are two air outlets on a diagonal line, and the second air outlet 321 and the fourth air outlet are two air outlets on another diagonal line, the measurement of the straightness of the bearing can be realized.

[0085] By switching the connection state between the detection flow path 270 and multiple air inlet holes, the three parameters of the bearing inner diameter, cylindricity and squareness can be measured. Compared with the related technology of using two measuring tools to measure the three parameters, while achieving accurate measurement of the three parameters of the bearing inner diameter, cylindricity and squareness, it can effectively reduce measurement time and reduce labor intensity.

[0086] Furthermore, because first and second air outlet holes 311 and 321 are located on the same cross-section of measuring tool 120, and third and fourth air outlet holes 331 and 334 are located on different cross-sections of measuring tool 120, when measuring the bearing's inner diameter, cylindricity, and squareness, two parameters, namely, inner diameter and cylindricity, and two parameters, namely, squareness, can be obtained, respectively. The bearing can be rotated 90° relative to measuring tool 120 before re-measurement of the inner diameter, cylindricity, and squareness, thereby improving the accuracy of bearing parameter measurements.

[0087] like Figure 3 As shown, in some embodiments, optionally, the output port 280 includes a first output port 211 and a second output port 221, the first detection flow path 210 includes a first branch 212, a second branch 213, a third branch 214 and a fourth branch 215, the first branch 212, the second branch 213, the third branch 214 and the fourth branch 215 are connected to the first output port 211 respectively, the second detection flow path 220 includes a fifth branch 222, a sixth branch 223, a seventh branch 224 and an eighth branch 225, the fifth branch 222, the sixth branch 223, the seventh branch 224 and the eighth branch 225 are respectively connected to the second output port 221; wherein, based on the detection flow path 270 being in the first working position, the first branch 212 is connected to the first air inlet hole 312, the second branch 213 is connected to the second air inlet hole 322, the fifth branch 222 is connected to the third air inlet hole 332, and the sixth branch 223 is connected to the fourth air inlet hole 342; based on the detection flow path 270 being in the second working position, the third branch 214 is connected to the first air inlet hole 312, the fourth branch 215 is connected to the third air inlet hole 332, the seventh branch 224 is connected to the second air inlet hole 322, and the eighth branch 225 is connected to the fourth air inlet hole 342.

[0088] In this embodiment, the first detection flow path 210 includes four branches, namely, a first branch 212, a second branch 213, a third branch 214, and a fourth branch 215. The second detection flow path 220 includes four branches, namely, a fifth branch 222, a sixth branch 223, a seventh branch 224, and an eighth branch 225. Each channel 300 connects two branches. Specifically, the first air inlet 312 of the first channel 310 connects the first branch 212 and the third branch 214, the second air inlet 322 of the second channel 320 connects the second branch 213 and the seventh branch 224, the third air inlet 332 of the third channel 330 connects the fourth branch 215 and the fifth branch 222, and the fourth air inlet 342 of the fourth channel 340 connects the sixth branch 223 and the eighth branch 225.

[0089] Specifically, when the inner diameter and cylindricity of the bearing are measured, the detection flow path 270 is switched to the first working position. At this time, the first branch 212 is connected to the first air inlet hole 312, the second branch 213 is connected to the second air inlet hole 322, the fifth branch 222 is connected to the third air inlet hole 332, and the sixth branch 223 is connected to the fourth air inlet hole 342. That is to say, the passage formed by the third branch 214 and the first air inlet hole 312 is cut off, the passage formed by the fourth branch 215 and the third air inlet hole 332 is cut off, the passage formed by the seventh branch 224 and the second air inlet hole 322 is cut off, and the passage formed by the eighth branch 225 and the fourth air inlet hole 342 is cut off. That is, the first detection flow path 210 corresponds to the first air outlet 311 and the second air outlet 321 on the measuring tool 120, and the second detection flow path 220 corresponds to the third air outlet 331 and the fourth air outlet on the measuring tool 120. Since the first air outlet 311 and the second air outlet 321 are radially opposite to each other, and the third air outlet 331 and the fourth air outlet are radially opposite to each other, the measurement of the bearing inner diameter and cylindricity can be achieved.

[0090] When the straightness of the bearing is measured, the detection flow path 270 switches to the second working position. At this time, the third branch 214 is connected to the first air inlet hole 312, the fourth branch 215 is connected to the third air inlet hole 332, the seventh branch 224 is connected to the second air inlet hole 322, and the eighth branch 225 is connected to the fourth air inlet hole 342. That is to say, the passage formed by the first branch 212 and the first air inlet hole 312 is cut off, the passage formed by the fifth branch 222 and the third air inlet hole 332 is cut off, the passage formed by the second branch 213 and the second air inlet hole 322 is cut off, and the passage formed by the sixth branch 223 and the fourth air inlet hole 342 is cut off. That is, the first detection flow path 210 corresponds to the first air outlet 311 and the third air outlet 331 on the measuring tool 120, and the second detection flow path 220 corresponds to the second air outlet 321 and the fourth air outlet on the measuring tool 120. Since the first air outlet 311 and the third air outlet 331 are two air outlets on a diagonal line, and the second air outlet 321 and the fourth air outlet are two air outlets on another diagonal line, the measurement of the bearing straightness can be achieved.

[0091] By switching the connection state between the detection flow path 270 and the plurality of air inlet holes, the three parameters of the bearing inner diameter, cylindricity and squareness can be measured, thereby effectively reducing the measurement time and lowering the labor intensity.

[0092] like Figure 4As shown, in some embodiments, optionally, the plurality of channels 300 include a first channel 310, a second channel 320, a third channel 330, a fourth channel 340, a fifth channel 350, a sixth channel 360, a seventh channel 370, and an eighth channel 380. The first air outlet 311 of the first channel 310, the second air outlet 321 of the second channel 320, the third air outlet 331 of the third channel 330, and the fourth air outlet 340 are arranged along the circumference of the measuring tool 120. Along the radial direction of the measuring tool 120, the first air outlet 311 and the second air outlet 321 are arranged opposite to each other, and the third air outlet 331 and the fourth air outlet 340 are arranged opposite to each other. The fifth air outlet 351 of the fifth channel 350, the sixth air outlet 361 of the sixth channel 360, the seventh air outlet 371 of the seventh channel 370, and the eighth air outlet 380 are arranged relative to each other along the circumference of the measuring tool 120. In the radial direction of the measuring tool 120, the fifth air outlet 351 and the sixth air outlet 361 are arranged relative to each other, and the seventh air outlet 371 and the eighth air outlet are arranged relative to each other. In the axial direction of the measuring tool 120, the first air outlet 311 and the fifth air outlet 351 are arranged relative to each other, the second air outlet 321 and the sixth air outlet 361 are arranged relative to each other, the third air outlet 331 and the seventh air outlet 371 are arranged relative to each other, and the fourth air outlet 331 and the seventh air outlet 371 are arranged relative to each other. The air outlet is arranged opposite to the eighth air outlet; wherein the detection flow path 270 includes a first detection flow path 210, a second detection flow path 220, a third detection flow path 230 and a fourth detection flow path 240, and the multiple working positions include a first working position and a second working position. Based on the detection flow path 270 being in the first working position, the first detection flow path 210 is connected to the first air inlet 312 of the first channel 310 and the second air inlet 322 of the second channel 320, the second detection flow path 220 is connected to the third air inlet 332 of the third channel 330 and the fourth air inlet 342 of the fourth channel 340, and the third detection flow path 230 is connected to the fifth channel The fifth air inlet hole 352 of the channel 350 and the sixth air inlet hole 362 of the sixth channel 360, the fourth detection flow path 240 is connected to the seventh air inlet hole 372 of the seventh channel 370 and the eighth air inlet hole 382 of the eighth channel 380; based on the detection flow path 270 being in the second working position, the first detection flow path 210 is connected to the first air inlet hole 312 and the sixth air inlet hole 362, the second detection flow path 220 is connected to the second air inlet hole 322 and the fifth air inlet hole 352, the third detection flow path 230 is connected to the third air inlet hole 332 and the eighth air inlet hole 382, ​​and the fourth detection flow path 240 is connected to the fourth air inlet hole 342 and the seventh air inlet hole 372.

[0093] In this embodiment, another measurement method is defined, in which the number of channels 300 is eight, namely, a first channel 310, a second channel 320, a third channel 330, a fourth channel 340, a fifth channel 350, a sixth channel 360, a seventh channel 370 and an eighth channel 380. Since the air outlets of the channels 300 are provided on the measuring tool 120, that is, the first air outlet 311 of the first channel 310, the second air outlet 321 of the second channel 320, the third air outlet 331 of the third channel 330, the fourth air outlet 340, and the fifth air outlet 350 of the fifth channel 350 are provided. 351, the sixth air outlet 361 of the sixth channel 360, the seventh air outlet 371 of the seventh channel 370 and the eighth air outlet 380 are respectively arranged on the measuring tool 120, and the first air outlet 311, the second air outlet 321, the third air outlet 331 and the fourth air outlet are arranged along the circumference of the measuring tool 120, that is, the first air outlet 311, the second air outlet 321, the third air outlet 331 and the fourth air outlet are four air outlet holes on the same cross-section of the measuring tool 120, and the first air outlet 311 and the second air outlet 321 are radially opposite to each other, and the third air outlet 331 and the fourth air outlet are radially opposite to each other.

[0094] The fifth air outlet 351, the sixth air outlet 361, the seventh air outlet 371 and the eighth air outlet are arranged along the circumference of the measuring tool 120. That is, the fifth air outlet 351, the sixth air outlet 361, the seventh air outlet 371 and the eighth air outlet are four air outlets on another cross section of the measuring tool 120, and the fifth air outlet 351 and the sixth air outlet 361 are radially opposite to each other, the seventh air outlet 371 and the eighth air outlet are radially opposite to each other, and the first air outlet 311 is axially opposite to the fifth air outlet 351, and the second air outlet 321 is axially opposite to each other. 1 is axially opposite to the sixth air outlet hole 361, the third air outlet hole 331 is axially opposite to the seventh air outlet hole 371, and the fourth air outlet hole is axially opposite to the eighth air outlet hole. That is, the first air outlet hole 311 and the sixth air outlet hole 361 are two air outlet holes on a diagonal line, the second air outlet hole 321 and the fifth air outlet hole 351 are two air outlet holes on a diagonal line, the third air outlet hole 331 and the eighth air outlet hole are two air outlet holes on a diagonal line, and the fourth air outlet hole and the seventh air outlet hole 371 are two air outlet holes on a diagonal line.

[0095] When measuring the inner diameter and cylindricity of the bearing, the detection flow path 270 is switched to the first working position, the first detection flow path 210 is connected to the first air inlet 312 of the first channel 310 and the second air inlet 322 of the second channel 320, the second detection flow path 220 is connected to the third air inlet 332 of the third channel 330 and the fourth air inlet 342 of the fourth channel 340, the third detection flow path 230 is connected to the fifth air inlet 352 of the fifth channel 350 and the sixth air inlet 362 of the sixth channel 360, and the fourth detection flow path 240 is connected to the first air inlet 312 of the first channel 310 and the second air inlet 322 of the second channel 320. The seventh air inlet 372 of the seventh channel 370 is connected to the eighth air inlet 382 of the eighth channel 380. That is, the first detection flow path 210 corresponds to the first air outlet 311 and the second air outlet 321 on the measuring tool 120, the second detection flow path 220 corresponds to the third air outlet 331 and the fourth air outlet on the measuring tool 120, the third detection flow path 230 corresponds to the fifth air outlet 351 and the sixth air outlet 361 on the measuring tool 120, and the fourth detection flow path 240 corresponds to the seventh air outlet 371 and the eighth air outlet on the measuring tool 120. Because the first air outlet 311 and the second air outlet 321 are radially opposite, the third air outlet 331 and the fourth air outlet are radially opposite, the fifth air outlet 351 and the sixth air outlet 361 are radially opposite, and the seventh air outlet 371 and the eighth air outlet are radially opposite, the bearing inner diameter and cylindricity can be measured.

[0096] When the straightness of the bearing is measured, the detection flow path 270 switches to the second working position, the first detection flow path 210 connects the first air inlet 312 and the sixth air inlet 362, the second detection flow path 220 connects the second air inlet and the fifth air inlet 352, the third detection flow path 230 connects the third air inlet 332 and the eighth air inlet 382, ​​and the fourth detection flow path 240 connects the fourth air inlet 342 and the seventh air inlet 372. That is to say, the first detection flow path 210 corresponds to the first air outlet 311 and the sixth air outlet 361 on the measuring tool 120, the second detection flow path 220 corresponds to the second air outlet 321 and the fifth air outlet 351 on the measuring tool 120, the third detection flow path 230 corresponds to the third air outlet 331 and the eighth air outlet on the measuring tool 120, and the fourth detection flow path 240 corresponds to the fourth air outlet and the seventh air outlet 371 on the measuring tool 120. Since the first air outlet 311 and the sixth air outlet 361 are two air outlets on a diagonal line, the second air outlet 321 and the fifth air outlet 351 are two air outlets on a diagonal line, the third air outlet 331 and the eighth air outlet are two air outlets on a diagonal line, and the fourth air outlet and the seventh air outlet 371 are two air outlets on a diagonal line, the measurement of the bearing straightness can be achieved.

[0097] By switching the connection state between the detection flow path 270 and multiple air inlet holes, the three parameters of the bearing inner diameter, cylindricity and squareness can be measured. Compared with the related technology of using two measuring tools to measure the three parameters, while achieving accurate measurement of the three parameters of the bearing inner diameter, cylindricity and squareness, it can effectively reduce measurement time and reduce labor intensity.

[0098] In addition, by setting up eight channels 300, the measurement of the inner diameter, cylindricity and squareness of the four parameters of the bearing can be realized, which is conducive to improving the accuracy of bearing parameter measurement, further saving the time of measuring a single bearing parameter, and further reducing labor intensity.

[0099] like Figure 4As shown, in some embodiments, optionally, the output port 280 includes a first output port 211, a second output port 221, a third output port 231, and a fourth output port 241, the first detection flow path 210 includes a first branch 212, a second branch 213, a third branch 214, and a fourth branch 215, the first branch 212, the second branch 213, the third branch 214, and the fourth branch 215 are respectively connected to the first output port 211, the second detection flow path 220 includes a fifth branch 222, a sixth branch 223, a seventh branch 224, and an eighth branch 225 The fifth branch 222, the sixth branch 223, the seventh branch 224 and the eighth branch 225 are respectively connected to the second output port 221, the third detection flow path 230 includes the ninth branch 232, the tenth branch 233, the eleventh branch 234 and the twelfth branch 235, the ninth branch 232, the tenth branch 233, the eleventh branch 234 and the twelfth branch 235 are respectively connected to the third output port 231, the fourth detection flow path 240 includes the thirteenth branch 242, the fourteenth branch 243, the fifteenth branch 244 and the sixteenth branch 245, the thirteenth branch 242, the fourteenth branch 243, the fifteenth branch 244 and the sixteenth branch 245 are respectively connected to the fourth output port 241; wherein, based on the detection flow path 270 being in the first working position, the first branch 212 is connected to the first air inlet 312, the second branch 213 is connected to the second air inlet 322, the fifth branch 222 is connected to the third air inlet 332, the sixth branch 223 is connected to the fourth air inlet 342, the ninth branch 232 is connected to the fifth air inlet 352, the tenth branch 233 is connected to the sixth air inlet 362, and the thirteenth branch 242 is connected to the seventh air inlet 3 72, the fourteenth branch 243 is connected to the eighth air inlet hole 382; based on the detection flow path 270 being in the second working position, the third branch 214 is connected to the first air inlet hole 312, the fourth branch 215 is connected to the sixth air inlet hole 362, the seventh branch 224 is connected to the second air inlet hole 322, the eighth branch 225 is connected to the fifth air inlet hole 352, the eleventh branch 234 is connected to the third air inlet hole 332, the twelfth branch 235 is connected to the eighth air inlet hole 382, ​​the fifteenth branch 244 is connected to the fourth air inlet hole 342, and the sixteenth branch 245 is connected to the seventh air inlet hole 372.

[0100] In this embodiment, the first detection flow path 210 includes four branches, namely the first branch 212, the second branch 213, the third branch 214 and the fourth branch 215, the second detection flow path 220 includes four branches, namely the fifth branch 222, the sixth branch 223, the seventh branch 224 and the eighth branch 225, the third detection flow path 230 includes four branches, namely the ninth branch 232, the tenth branch 233, the eleventh branch 234 and the twelfth branch 235, and the fourth detection flow path 240 includes four branches, namely the thirteenth branch 242, the fourteenth branch 243, the fifteenth branch 244 and the sixteenth branch 245.

[0101] Each channel 300 is connected to two branches, specifically, the first air inlet 312 of the first channel 310 connects the first branch 212 and the third branch 214, the second air inlet 322 of the second channel 320 connects the second branch 213 and the seventh branch 224, the third air inlet 332 of the third channel 330 connects the fifth branch 222 and the eleventh branch 234, the fourth air inlet 342 of the fourth channel 340 connects the sixth branch 223 and the fifteenth branch 244, the fifth air inlet 352 of the fifth channel 350 connects the eighth branch 225 and the ninth branch 232, the sixth air inlet 362 of the sixth channel 360 connects the fourth branch 215 and the tenth branch 233, the seventh air inlet 372 of the seventh channel 370 connects the thirteenth branch 242 and the sixteenth branch 245, and the eighth air inlet 382 of the eighth channel 380 connects the twelfth branch 235 and the fourteenth branch 243.

[0102] Specifically, when the inner diameter and cylindricity of the bearing are measured, the detection flow path 270 is switched to the first working position. At this time, the first branch 212 is connected to the first air inlet hole 312, the second branch 213 is connected to the second air inlet hole 322, the fifth branch 222 is connected to the third air inlet hole 332, the sixth branch 223 is connected to the fourth air inlet hole 342, the ninth branch 232 is connected to the fifth air inlet hole 352, the tenth branch 233 is connected to the sixth air inlet hole 362, the thirteenth branch 242 is connected to the seventh air inlet hole 372, and the fourteenth branch 243 is connected to the eighth air inlet hole 382. In other words, the third branch 212 is connected to the first air inlet hole 312, the second branch 213 is connected to the second air inlet hole 322, the fifth branch 222 is connected to the third air inlet hole 332, the sixth branch 223 is connected to the fourth air inlet hole 342, the ninth branch 232 is connected to the fifth air inlet hole 352, the tenth branch 233 is connected to the sixth air inlet hole 362, the thirteenth branch 242 is connected to the seventh air inlet hole 372, and the fourteenth branch 243 is connected to the eighth air inlet hole 382. The passage formed by the branch 214 and the first air inlet hole 312 is cut off, the passage formed by the fourth branch 215 and the sixth air inlet hole 362 is cut off, the passage formed by the seventh branch 224 and the second air inlet hole 322 is cut off, the passage formed by the eighth branch 225 and the fifth air inlet hole 352 is cut off, the passage formed by the eleventh branch 234 and the third air inlet hole 332 is cut off, the passage formed by the twelfth branch 235 and the eighth air inlet hole 382 is cut off, the passage formed by the fifteenth branch 244 and the fourth air inlet hole 342 is cut off, and the passage formed by the sixteenth branch 245 and the seventh air inlet hole 372 is cut off. That is, the first detection flow path 210 corresponds to the first and second air outlet holes 311 and 321 on the measuring tool 120, the second detection flow path 220 corresponds to the third and fourth air outlet holes 331 and 361 on the measuring tool 120, the third detection flow path 230 corresponds to the fifth and sixth air outlet holes 351 and 361 on the measuring tool 120, and the fourth detection flow path 240 corresponds to the seventh and eighth air outlet holes on the measuring tool 120. Because the first and second air outlet holes 311 and 321 are radially opposite, the third and fourth air outlet holes 331 and 341 are radially opposite, the fifth and sixth air outlet holes 351 and 361 are radially opposite, and the seventh and eighth air outlet holes 371 are radially opposite, the bearing inner diameter and cylindricity can be measured.

[0103] When the straightness of the bearing is measured, the detection flow path 270 is switched to the second working position. At this time, the third branch 214 is connected to the first air inlet 312, the fourth branch 215 is connected to the sixth air inlet 362, the seventh branch 224 is connected to the second air inlet 322, the eighth branch 225 is connected to the fifth air inlet 352, the eleventh branch 234 is connected to the third air inlet 332, the twelfth branch 235 is connected to the eighth air inlet 382, ​​the fifteenth branch 244 is connected to the fourth air inlet 342, and the sixteenth branch 245 is connected to the seventh air inlet 372. In other words, the first branch The passage formed by the branch 212 and the first air inlet hole 312 is cut off, the passage formed by the second branch 213 and the second air inlet hole 322 is cut off, the passage formed by the fifth branch 222 and the third air inlet hole 332 is cut off, the passage formed by the sixth branch 223 and the fourth air inlet hole 342 is cut off, the passage formed by the ninth branch 232 and the fifth air inlet hole 352 is cut off, the passage formed by the tenth branch 233 and the sixth air inlet hole 362 is cut off, the passage formed by the thirteenth branch 242 and the seventh air inlet hole 372 is cut off, and the passage formed by the fourteenth branch 243 and the eighth air inlet hole 382 is cut off. That is, the first detection flow path 210 corresponds to the first air outlet 311 and the sixth air outlet 361 on the measuring tool 120, the second detection flow path 220 corresponds to the second air outlet 321 and the fifth air outlet 351 on the measuring tool 120, the third detection flow path 230 corresponds to the third air outlet 331 and the eighth air outlet on the measuring tool 120, and the fourth detection flow path 240 corresponds to the fourth air outlet and the seventh air outlet 371 on the measuring tool 120. Since the first air outlet 311 and the sixth air outlet 361 are two air outlets on a diagonal line, the second air outlet 321 and the fifth air outlet 351 are two air outlets on a diagonal line, the third air outlet 331 and the eighth air outlet are two air outlets on a diagonal line, and the fourth air outlet and the seventh air outlet 371 are two air outlets on a diagonal line, the bearing squareness can be measured.

[0104] By switching the connection state between the detection flow path 270 and the plurality of air inlet holes, the three parameters of the bearing inner diameter, cylindricity and squareness can be measured, thereby effectively reducing the measurement time and lowering the labor intensity.

[0105] In some embodiments, optionally, the measuring device further includes a switch module, which is provided in the detection flow path 270 and is used to switch the detection flow path 270 to different working positions.

[0106] In this embodiment, it is defined that the measuring device also includes a switch module. Specifically, the switch module is arranged on the detection flow path 270. By controlling the working state of the switch module, the detection flow path 270 can be switched to different working positions, thereby switching the connection state between the detection flow path 270 and the multiple air inlet holes, thereby realizing the measurement of the three parameters of the bearing inner diameter, cylindricity and straightness. Compared with the related technology of using two measuring tools to measure the three parameters, while realizing the accurate measurement of the three parameters of the bearing inner diameter, cylindricity and straightness, it can effectively reduce the measurement time and reduce the labor intensity.

[0107] Optionally, the switch module includes a solenoid valve or a one-way valve.

[0108] like Figure 1 As shown, in some embodiments, optionally, the central axis 400 of the measuring tool 120 is perpendicular to the working surface 110 .

[0109] In this embodiment, since the working surface 110 is used to accommodate the workpiece to be measured, the central axis 400 of the measuring tool 120 is perpendicular to the working surface 110 , which can improve the accuracy of parameter detection of the workpiece to be measured.

[0110] like Figure 1 and Figure 5 As shown, in some embodiments, optionally, the measuring device further includes a protective member 500 , which is disposed at one end of the measuring tool 120 away from the working surface 110 and is connected to the measuring tool 120 .

[0111] In this embodiment, it is defined that the measuring device further includes a protective member 500. It is understandable that when measuring the parameters of a bearing (part to be measured), the bearing needs to be sleeved on the measuring tool 120. After the measurement is completed, the bearing is removed from the measuring tool 120. In the process of measuring a large number of bearings, a large number of bearings need to be sleeved and removed from the measuring tool 120 respectively. During this process, the bearing is prone to contact with the end of the measuring tool 120, resulting in serious wear on the end of the measuring tool 120, which affects the service life of the measuring tool 120.

[0112] By providing a protective member 500 at the end of the measuring tool 120 away from the working surface 110 , the end of the measuring tool 120 can be protected, thereby reducing the wear of the measuring tool 120 during the measurement of bearing parameters and extending the service life of the measuring tool 120 .

[0113] Optionally, the protective member 500 includes a plastic member.

[0114] like Figure 5 As shown, in some embodiments, optionally, the measuring device further includes a positioning structure 600 , and the positioning structure 600 is provided on the working surface 110 .

[0115] In this embodiment, it is defined that the measuring device also includes a positioning structure 600. Specifically, the positioning structure 600 is arranged on the working surface 110. When measuring the bearing, the bearing can be positioned, which is beneficial to improving the measurement efficiency of the bearing and further saving measurement time.

[0116] Optionally, the positioning structure 600 includes a plurality of positioning portions, which are arranged at intervals along the circumference of the measuring tool 120 , thereby enabling rapid positioning of the bearing during installation and reducing time consumption.

[0117] Optionally, along the axial direction of the measuring tool 120, the end face of the positioning structure 600 is higher than the working surface 110. When the workpiece to be measured is placed, the workpiece to be measured contacts the positioning structure 600, which can reduce the contact area between the workpiece to be measured and the working surface 110, thereby reducing the wear of the bearing during the measurement process.

[0118] like Figure 1 and Figure 5 As shown, in some embodiments, optionally, the measuring piece 100 further includes a support frame 130, a support platform 140 and a mounting plate 150, wherein the support platform 140 is arranged on the support frame 130, and a working surface 110 is provided on the side of the support platform 140 away from the support frame 130, and the mounting plate 150 is arranged on the side of the support frame 130 away from the support platform 140, and the mounting plate 150 is provided with a plurality of interfaces 151; each channel 300 of the plurality of channels 300 includes two sub-channels, one end of one sub-channel includes an air inlet, and the other end is connected to an interface 151, and one end of the other sub-channel includes an air outlet, and the other end is connected to the interface 151.

[0119] In this embodiment, it is defined that the measuring piece 100 also includes a support frame 130, a support platform 140 and a mounting plate 150. Specifically, the support platform 140 and the mounting plate 150 are respectively located on opposite sides of the support frame 130. The support platform 140 is provided with a working surface 110, that is, the measuring tool 120 is provided on the support platform 140. Since the working surface 110 is used to accommodate the piece to be measured, the support platform 140 can provide reliable support for the piece to be measured.

[0120] The mounting plate 150 is provided with a plurality of interfaces 151 . One end of one sub-channel of each channel 300 is an air inlet and the other end is connected to the interface 151 . One end of another sub-channel is an air outlet and the other end is connected to the interface 151 .

[0121] Optionally, the measuring device includes multiple hoses, including a first hose and a second hose, the two ends of the first hose are respectively connected to the air inlet and the interface 151, the two ends of the second hose are respectively connected to the air outlet and the interface 151, and the air inlet, the interface 151, the air outlet, the inner wall of the first hose and the inner wall of the second hose form one of the channels 300.

[0122] like Figure 1 As shown, in some embodiments, optionally, the support platform 140 includes a first support plate 141 and a second support plate 142, wherein the first support plate 141 is arranged on the support frame 130, and the second support plate 142 is arranged on the side of the first support plate 141 away from the support frame 130, and the side of the second support plate 142 away from the first support plate 141 is provided with a working surface 110; the hardness of the second support plate 142 is greater than the hardness of the first support plate 141.

[0123] In this embodiment, the support platform 140 is defined to include a first support plate 141 and a second support plate 142 . Specifically, the first support plate 141 is disposed on the support frame 130 , and the second support plate 142 is disposed on the first support plate 141 , wherein the second support plate 142 includes a working surface 110 .

[0124] Since the hardness of the second support plate 142 is greater than that of the first support plate 141, that is, the support plate provided with the working surface 110 has a greater hardness, the wear of the second support plate 142 can be reduced during the bearing parameter measurement process, so that the working surface 110 and the central axis 400 of the measuring tool 120 remain perpendicular, which is beneficial to improving the measurement accuracy of the bearing parameters and extending the service life of the measuring piece 100.

[0125] Optionally, the second support plate 142 is a tungsten steel plate, and the first support plate 141 is 45# steel.

[0126] like Figure 1 As shown, in some embodiments, optionally, the support frame 130 includes a main body 131 and a plurality of legs 132, wherein, along the axial direction of the measuring tool 120, the support platform 140 and the mounting plate 150 are respectively located on both sides of the main body 131, and the plurality of legs 132 are arranged on the side of the main body 131 away from the support platform 140, so that the mounting plate 150 is suspended on the side away from the main body 131.

[0127] In this embodiment, the support frame 130 is defined to include a main body 131 and a plurality of legs 132. Specifically, the plurality of legs 132 are arranged on a side of the main body 131 away from the support platform 140 to provide support and to suspend the mounting plate 150 to facilitate the connection of the hose.

[0128] Optionally, the air path converter 200 also includes a first indicator light 250 and a second indicator light 260, wherein the first indicator light 250 is an inner diameter indicator light, that is, when the first indicator light 250 is on, it indicates that the inner diameter and cylindricity of the bearing are being measured at this time, and the second indicator light 260 is a squareness indicator light, that is, when the second indicator light 260 is on, it indicates that the squareness of the bearing is being measured at this time.

[0129] like Figure 6As shown, optionally, the measuring device also includes a ring gauge 700, which is used to calibrate the measuring tool 120. The outer wall of the ring gauge 700 is provided with a knurling 710 for easy handling. Optionally, there are two ring gauges 700, one of which is used to calibrate the upper limit of the measuring tool 120, and the other is used to calibrate the lower limit of the measuring tool 120. The inner diameter of the standard part (ring gauge 700) is determined according to the diameter of the probe (measuring tool 120) and the inner diameter of the workpiece (to be measured), with design upper and lower limits. The material is GCr15, the hardness is HRC58~HRC62, and the surface is bluish. Before the measuring tool (measuring piece 100) measures the workpiece, it is necessary to use large and small ring gauges for calibration.

[0130] The present invention provides a measuring tool (measuring device) for simultaneously measuring the inner diameter, cylindricity, and right angle of a bearing. The measuring tool (measuring device) includes a measuring tool assembly (measuring piece 100) and two large and small standard parts (ring gauge 700). The measuring tool assembly (measuring piece 100) includes a base (support frame 130), a gasket (support platform 140), a probe (measuring tool 120), a protective cap (protective piece 500), a bottom leg (support leg 132), and a bottom plate (mounting plate 150). The bottom plate (mounting plate 150) has 8 air inlet holes (interface 151), corresponding to the 8 probe holes (air outlet holes) on the probe (measuring tool 120). The two standard parts are a large ring gauge and a small ring gauge, which are used to calibrate the large and small ranges of the bearing measuring tool (measuring tool 120). In addition, there is an air path converter 200, which is connected to the 8 air inlet holes (interface 151) via an air pipe (hose).

[0131] This measuring tool (measuring device) combines the measuring tools for inner diameter size and cylindricity with the measuring tool for squareness for detection. Using the same measuring tool (measuring device), the gas path converter 200 is used to control the gas path conversion to achieve switching measurement of inner diameter size, cylindricity and squareness, and ultimately achieve the same measuring tool (measuring device) to measure inner diameter size, cylindricity and squareness.

[0132] The channel correspondence relationship of inner diameter measurement is 1 (first air outlet 311)-2 (second air outlet 321), 3 (third air outlet 331)-4 (fourth air outlet), 5 (fifth air outlet 351)-6 (sixth air outlet 361), 7 (seventh air outlet 371)-8 (eighth air outlet), which is converted into the corresponding relationship of right angle measurement: 1 (first air outlet 311)-6 (sixth air outlet 361), 2 (second air outlet 321)- 5 (fifth air outlet 351), 3 (third air outlet 331)-8 (eighth air outlet), 4 (fourth air outlet)-7 (seventh air outlet 371), using the air path converter 200, by controlling the solenoid valve (switch module) to convert the channels for measuring the straightness and measuring the inner diameter (detection flow path 270), a 4-linked bearing inner diameter straightness measuring tool (measuring device) is realized, which can simultaneously measure the inner diameter of 4 parameters and the straightness of 4 parameters.

[0133] The base (support frame 130) is made of 45# steel with a blued surface. A gasket (support platform 140) is installed on top, and a base plate (mounting plate 150) is installed below. The base (support frame 130) is supported by the bottom legs (legs 132). A probe (measuring tool 120) is installed above the center of the gasket (support platform 140), and the probe (measuring tool 120) and the gasket (support platform 140) remain perpendicular. A protective cap (protective member 500) is installed on the probe (measuring tool 120). The protective cap (protective member 500) is made of blue nylon and is located above the probe (measuring tool 120). It is locked with a hexagonal nut to protect the probe (measuring tool 120).

[0134] The gasket (support platform 140) is made of 45# steel and alloy. The lower part (first support plate 141) is 45# steel, and the non-working surface is blued. The upper part (second support plate 142) is alloy, which is the working surface 110 and needs to be polished to facilitate the placement of the workpiece (to be measured) to maintain parallelism.

[0135] The base plate (mounting plate 150) has eight air inlet holes (interfaces 151), which are connected to the eight probe holes (air outlets) on the measuring probe (gauge 120) via flexible pipes. The other end of the air inlet holes (interfaces 151) is connected to the air path converter (air path converter 200). The bottom legs (support legs 132) are made of 45# steel with a blued surface. They are located at the four corners of the base (support frame 130) and are used to support the base (support frame 130), keeping the base plate (mounting plate 150) suspended.

[0136] The probe (gauge 120) has eight probe holes (vents). The probe material is GCr15, with a hardness of HRC58 to HRC62 and a bluish surface. The probe holes (vents) are divided into two layers: the upper layer is numbered #1, #2, #3, and #4, and the lower layer is numbered #5, #6, #7, and #8. Within the same layer, #1 is opposite #2, #3 is opposite #4, #5 is opposite #6, and #7 is opposite #8. The vertical correspondence is: #1 is perpendicular to #5, #2 is perpendicular to #6, #3 is perpendicular to #7, and #4 is perpendicular to #8. Therefore, the corresponding channels for measuring bearing inner diameter and cylindricity correspond to four sets of parameters: 1 (first air outlet 311)-2 (second air outlet 321), 3 (third air outlet 331)-4 (fourth air outlet), 5 (fifth air outlet 351)-6 (sixth air outlet 361), and 7 (seventh air outlet 371)-8 (eighth air outlet). The corresponding channels for measuring bearing inner diameter and squareness correspond to four sets of parameters: 1 (first air outlet 311)-6 (sixth air outlet 361), 2 (second air outlet 321)-5 (fifth air outlet 351), 3 (third air outlet 331)-8 (eighth air outlet), and 4 (fourth air outlet)-7 (seventh air outlet 371). Therefore, this four-way bearing inner diameter and squareness measuring tool (measuring device) can simultaneously measure four parameters: inner diameter, cylindricity, and squareness.

[0137] like Figure 4 As shown, the device has 8 air hole measurement channels, which are connected to the 8 air inlet holes of the measuring tool. Each channel 300 is connected to 2 branches, for a total of 16 branches, namely, channel #1 (first channel 310) corresponds to branches A-#1 and B-#1; channel #2 (second channel 320) corresponds to branches A-#2 and B-#2; channel #3 (third channel 330) corresponds to branches A-#3 and B-#3; channel #4 (fourth channel 340) corresponds to branches #A-#4 and B-#4; channel #5 (fifth channel 350) corresponds to branches A-#5 and B-#5; channel #6 (sixth channel 360) corresponds to branches A-#6 and B-#6; channel #7 (seventh channel 370) corresponds to branches A-#7 and B-#7; channel #8 (eighth channel 380) corresponds to branches A-#8 and B-#8 (A represents measuring inner diameter; B represents measuring straightness).

[0138] Therefore, the inner diameter measurement branches are A-#1 (first branch), A-#2 (second branch); A-#3 (fifth branch), A-#4 (sixth branch); A-#5 (ninth branch), A-#6 (tenth branch); A-#7 (thirteenth branch), and A-#8 (fourteenth branch). The straightness measurement branches are B-#1 (third branch), B-#6 (fourth branch); B-#2 (seventh branch), B-#5 (eighth branch); B-#3 (eleventh branch), B-#8 (twelfth branch); B-#4 (fifteenth branch), and A-#7 (sixteenth branch). Each branch has a one-way valve (switch module) that controls the air path (test flow path 270) to measure the bearing's inner diameter, cylindricity, or straightness.

[0139] In addition, the gas path converter 200 has 12 channels, and the first four channels (output port 280) are used to connect other analytical equipment and instruments. These four channels are CH1 (first output port 211), CH2 (second output port 221), CH3 (third output port 231), and CH4 (fourth output port 241), which are respectively connected to 16 branches. CH1 corresponds to branch A-#1 and A-#2 to measure the inner diameter, and corresponds to branch B-#1 and B-#6 to measure the straightness; CH2 corresponds to branch A-#3 and A-#4 to measure the inner diameter, and corresponds to branch B-#2 and B-#5 to measure the straightness; CH3 corresponds to branch A-#5 and A-#6 to measure the inner diameter, and corresponds to branch B-#3 and B-#8 to measure the straightness; CH4 corresponds to branch A-#7 and A-#8 to measure the inner diameter, and corresponds to branch B-#4 and A-#7 to measure the straightness. When measuring the inner diameter, the branch corresponding to the squareness is closed. When measuring the squareness, the branch corresponding to the inner diameter is closed.

[0140] The last eight air hole measurement channels (air inlet holes) are connected to the eight air inlet holes (interface 151) of the measuring tool (measuring piece 100). Each channel of the air path converter 200 has two branches, and each branch has a one-way valve (switch module). The one-way valve controls the air path channel (detection flow path 270) to simultaneously measure the inner diameter, cylindricity and straightness of the bearing.

[0141] like Figure 2 As shown, there are two indicator lights in the upper right corner. When measuring the inner diameter, the inner diameter indicator light (first indicator light 250) is on, and when measuring the straightness, the straightness indicator light (second indicator light 260) is on.

[0142] Figure 4This is a channel correspondence diagram for measuring inner diameter and squareness using the pneumatic converter 200 and the measuring tool (measuring piece 100). For measuring the inner diameter of the bearing, channel CH1 corresponds to branches A-#1 and A-#2; CH2 corresponds to branches A-#3 and A-#4; CH3 corresponds to branches A-#5 and A-#6; and CH4 corresponds to branches A-#7 and A-#8, forming four sets of joint parameters. For measuring the squareness of the bearing, channel CH1 corresponds to branches B-#1 and B-#6; CH2 corresponds to branches B-#2 and B-#5; CH3 corresponds to branches B-#3 and B-#8; and CH4 corresponds to branches B-#4 and A-#7, forming four sets of joint parameters.

[0143] According to a second aspect of the present invention, a bearing is provided, and parameters are measured by a measuring device as provided in any of the above embodiments, thereby having all the beneficial technical effects of the measuring device, which will not be described in detail here.

[0144] like Figure 3 As shown, in a specific embodiment, optionally, the output port 280 includes a first output port 211 and a second output port 221, the first detection flow path 210 includes a first branch 212, a second branch 213, a third branch 214 and a fourth branch 215, the first branch 212, the second branch 213, the third branch 214 and the fourth branch 215 are connected to the first output port 211 respectively, the second detection flow path 220 includes a fifth branch 222, a sixth branch 223, a seventh branch 224 and an eighth branch 225, the fifth branch 222, the sixth branch 223, the seventh branch 224 and the eighth branch 225 are connected to the first output port 211 respectively, The branches 225 are respectively connected to the second output port 221; wherein, based on the detection flow path 270 being in the first working position, the first branch 212 is connected to the first air inlet hole 312, the second branch 213 is connected to the second air inlet hole 322, the fifth branch 222 is connected to the third air inlet hole 332, and the sixth branch 223 is connected to the fourth air inlet hole 342; based on the detection flow path 270 being in the second working position, the third branch 214 is connected to the first air inlet hole 312, the fourth branch 215 is connected to the third air inlet hole 332, the seventh branch 224 is connected to the second air inlet hole 322, and the eighth branch 225 is connected to the fourth air inlet hole 342.

[0145] In this embodiment, the first detection flow path 210 includes four branches, namely, a first branch 212, a second branch 213, a third branch 214, and a fourth branch 215. The second detection flow path 220 includes four branches, namely, a fifth branch 222, a sixth branch 223, a seventh branch 224, and an eighth branch 225. Each channel 300 connects two branches. Specifically, the first air inlet 312 of the first channel 310 connects the first branch 212 and the third branch 214, the second air inlet 322 of the second channel 320 connects the second branch 213 and the seventh branch 224, the third air inlet 332 of the third channel 330 connects the fourth branch 215 and the fifth branch 222, and the fourth air inlet 342 of the fourth channel 340 connects the sixth branch 223 and the eighth branch 225.

[0146] Specifically, when the inner diameter and cylindricity of the bearing are measured, the detection flow path 270 is switched to the first working position. At this time, the first branch 212 is connected to the first air inlet hole 312, the second branch 213 is connected to the second air inlet hole 322, the fifth branch 222 is connected to the third air inlet hole 332, and the sixth branch 223 is connected to the fourth air inlet hole 342. That is to say, the passage formed by the third branch 214 and the first air inlet hole 312 is cut off, the passage formed by the fourth branch 215 and the third air inlet hole 332 is cut off, the passage formed by the seventh branch 224 and the second air inlet hole 322 is cut off, and the passage formed by the eighth branch 225 and the fourth air inlet hole 342 is cut off. That is, the first detection flow path 210 corresponds to the first air outlet 311 and the second air outlet 321 on the measuring tool 120, and the second detection flow path 220 corresponds to the third air outlet 331 and the fourth air outlet on the measuring tool 120. Since the first air outlet 311 and the second air outlet 321 are radially opposite to each other, and the third air outlet 331 and the fourth air outlet are radially opposite to each other, the measurement of the bearing inner diameter and cylindricity can be achieved.

[0147] When the straightness of the bearing is measured, the detection flow path 270 switches to the second working position. At this time, the third branch 214 is connected to the first air inlet hole 312, the fourth branch 215 is connected to the third air inlet hole 332, the seventh branch 224 is connected to the second air inlet hole 322, and the eighth branch 225 is connected to the fourth air inlet hole 342. That is to say, the passage formed by the first branch 212 and the first air inlet hole 312 is cut off, the passage formed by the fifth branch 222 and the third air inlet hole 332 is cut off, the passage formed by the second branch 213 and the second air inlet hole 322 is cut off, and the passage formed by the sixth branch 223 and the fourth air inlet hole 342 is cut off. That is, the first detection flow path 210 corresponds to the first air outlet 311 and the third air outlet 331 on the measuring tool 120, and the second detection flow path 220 corresponds to the second air outlet 321 and the fourth air outlet on the measuring tool 120. Since the first air outlet 311 and the third air outlet 331 are two air outlets on a diagonal line, and the second air outlet 321 and the fourth air outlet are two air outlets on another diagonal line, the measurement of the bearing straightness can be achieved.

[0148] By switching the connection state between the detection flow path 270 and the plurality of air inlet holes, the three parameters of the bearing inner diameter, cylindricity and squareness can be measured, thereby effectively reducing the measurement time and lowering the labor intensity.

[0149] like Figure 1 and Figure 4As shown, in another specific embodiment, optionally, the output port 280 includes a first output port 211, a second output port 221, a third output port 231 and a fourth output port 241, the first detection flow path 210 includes a first branch 212, a second branch 213, a third branch 214 and a fourth branch 215, the first branch 212, the second branch 213, the third branch 214 and the fourth branch 215 are respectively connected to the first output port 211, the second detection flow path 220 includes a fifth branch 222, a sixth branch 223, a seventh branch 224 and an eighth branch 225, the fifth branch 222, the sixth branch 223, the seventh branch 224 and the eighth branch 225 are respectively connected to the second output port 221, the third detection flow path 230 includes the ninth branch 232, the tenth branch 233, the eleventh branch 234 and the twelfth branch 235, the ninth branch 232, the tenth branch 233, the eleventh branch 234 and the twelfth branch 235 are respectively connected to the third output port 231, the fourth detection flow path 240 includes the thirteenth branch 242, the fourteenth branch 243, the fifteenth branch 244 and the sixteenth branch 245, the thirteenth branch 245 The branch 242, the fourteenth branch 243, the fifteenth branch 244, and the sixteenth branch 245 are respectively connected to the fourth output port 241; wherein, based on the detection flow path 270 being in the first working position, the first branch 212 is connected to the first air inlet 312, the second branch 213 is connected to the second air inlet 322, the fifth branch 222 is connected to the third air inlet 332, the sixth branch 223 is connected to the fourth air inlet 342, the ninth branch 232 is connected to the fifth air inlet 352, the tenth branch 233 is connected to the sixth air inlet 362, and the thirteenth branch 242 is connected to the seventh air inlet 372, the fourteenth branch 243 is connected to the eighth air inlet hole 382; based on the detection flow path 270 being in the second working position, the third branch 214 is connected to the first air inlet hole 312, the fourth branch 215 is connected to the sixth air inlet hole 362, the seventh branch 224 is connected to the second air inlet hole 322, the eighth branch 225 is connected to the fifth air inlet hole 352, the eleventh branch 234 is connected to the third air inlet hole 332, the twelfth branch 235 is connected to the eighth air inlet hole 382, ​​the fifteenth branch 244 is connected to the fourth air inlet hole 342, and the sixteenth branch 245 is connected to the seventh air inlet hole 372.

[0150] In this embodiment, the first detection flow path 210 includes four branches, namely the first branch 212, the second branch 213, the third branch 214 and the fourth branch 215, the second detection flow path 220 includes four branches, namely the fifth branch 222, the sixth branch 223, the seventh branch 224 and the eighth branch 225, the third detection flow path 230 includes four branches, namely the ninth branch 232, the tenth branch 233, the eleventh branch 234 and the twelfth branch 235, and the fourth detection flow path 240 includes four branches, namely the thirteenth branch 242, the fourteenth branch 243, the fifteenth branch 244 and the sixteenth branch 245.

[0151] Each channel 300 is connected to two branches, specifically, the first air inlet 312 of the first channel 310 connects the first branch 212 and the third branch 214, the second air inlet 322 of the second channel 320 connects the second branch 213 and the seventh branch 224, the third air inlet 332 of the third channel 330 connects the fifth branch 222 and the eleventh branch 234, the fourth air inlet 342 of the fourth channel 340 connects the sixth branch 223 and the fifteenth branch 244, the fifth air inlet 352 of the fifth channel 350 connects the eighth branch 225 and the ninth branch 232, the sixth air inlet 362 of the sixth channel 360 connects the fourth branch 215 and the tenth branch 233, the seventh air inlet 372 of the seventh channel 370 connects the thirteenth branch 242 and the sixteenth branch 245, and the eighth air inlet 382 of the eighth channel 380 connects the twelfth branch 235 and the fourteenth branch 243.

[0152] Specifically, when the inner diameter and cylindricity of the bearing are measured, the detection flow path 270 is switched to the first working position. At this time, the first branch 212 is connected to the first air inlet hole 312, the second branch 213 is connected to the second air inlet hole 322, the fifth branch 222 is connected to the third air inlet hole 332, the sixth branch 223 is connected to the fourth air inlet hole 342, the ninth branch 232 is connected to the fifth air inlet hole 352, the tenth branch 233 is connected to the sixth air inlet hole 362, the thirteenth branch 242 is connected to the seventh air inlet hole 372, and the fourteenth branch 243 is connected to the eighth air inlet hole 382. In other words, the third branch 212 is connected to the first air inlet hole 312, the second branch 213 is connected to the second air inlet hole 322, the fifth branch 222 is connected to the third air inlet hole 332, the sixth branch 223 is connected to the fourth air inlet hole 342, the ninth branch 232 is connected to the fifth air inlet hole 352, the tenth branch 233 is connected to the sixth air inlet hole 362, the thirteenth branch 242 is connected to the seventh air inlet hole 372, and the fourteenth branch 243 is connected to the eighth air inlet hole 382. The passage formed by the branch 214 and the first air inlet hole 312 is cut off, the passage formed by the fourth branch 215 and the sixth air inlet hole 362 is cut off, the passage formed by the seventh branch 224 and the second air inlet hole 322 is cut off, the passage formed by the eighth branch 225 and the fifth air inlet hole 352 is cut off, the passage formed by the eleventh branch 234 and the third air inlet hole 332 is cut off, the passage formed by the twelfth branch 235 and the eighth air inlet hole 382 is cut off, the passage formed by the fifteenth branch 244 and the fourth air inlet hole 342 is cut off, and the passage formed by the sixteenth branch 245 and the seventh air inlet hole 372 is cut off. That is, the first detection flow path 210 corresponds to the first and second air outlet holes 311 and 321 on the measuring tool 120, the second detection flow path 220 corresponds to the third and fourth air outlet holes 331 and 361 on the measuring tool 120, the third detection flow path 230 corresponds to the fifth and sixth air outlet holes 351 and 361 on the measuring tool 120, and the fourth detection flow path 240 corresponds to the seventh and eighth air outlet holes on the measuring tool 120. Because the first and second air outlet holes 311 and 321 are radially opposite, the third and fourth air outlet holes 331 and 341 are radially opposite, the fifth and sixth air outlet holes 351 and 361 are radially opposite, and the seventh and eighth air outlet holes 371 are radially opposite, the bearing inner diameter and cylindricity can be measured.

[0153] When the straightness of the bearing is measured, the detection flow path 270 is switched to the second working position. At this time, the third branch 214 is connected to the first air inlet 312, the fourth branch 215 is connected to the sixth air inlet 362, the seventh branch 224 is connected to the second air inlet 322, the eighth branch 225 is connected to the fifth air inlet 352, the eleventh branch 234 is connected to the third air inlet 332, the twelfth branch 235 is connected to the eighth air inlet 382, ​​the fifteenth branch 244 is connected to the fourth air inlet 342, and the sixteenth branch 245 is connected to the seventh air inlet 372. In other words, the first branch The passage formed by the branch 212 and the first air inlet hole 312 is cut off, the passage formed by the second branch 213 and the second air inlet hole 322 is cut off, the passage formed by the fifth branch 222 and the third air inlet hole 332 is cut off, the passage formed by the sixth branch 223 and the fourth air inlet hole 342 is cut off, the passage formed by the ninth branch 232 and the fifth air inlet hole 352 is cut off, the passage formed by the tenth branch 233 and the sixth air inlet hole 362 is cut off, the passage formed by the thirteenth branch 242 and the seventh air inlet hole 372 is cut off, and the passage formed by the fourteenth branch 243 and the eighth air inlet hole 382 is cut off. That is, the first detection flow path 210 corresponds to the first air outlet 311 and the sixth air outlet 361 on the measuring tool 120, the second detection flow path 220 corresponds to the second air outlet 321 and the fifth air outlet 351 on the measuring tool 120, the third detection flow path 230 corresponds to the third air outlet 331 and the eighth air outlet on the measuring tool 120, and the fourth detection flow path 240 corresponds to the fourth air outlet and the seventh air outlet 371 on the measuring tool 120. Since the first air outlet 311 and the sixth air outlet 361 are two air outlets on a diagonal line, the second air outlet 321 and the fifth air outlet 351 are two air outlets on a diagonal line, the third air outlet 331 and the eighth air outlet are two air outlets on a diagonal line, and the fourth air outlet and the seventh air outlet 371 are two air outlets on a diagonal line, the bearing squareness can be measured.

[0154] By switching the connection state between the detection flow path 270 and the plurality of air inlet holes, the three parameters of the bearing inner diameter, cylindricity and squareness can be measured, thereby effectively reducing the measurement time and lowering the labor intensity.

[0155] According to a third aspect of the present invention, a compressor is provided, comprising a bearing as provided in any of the above embodiments, thereby possessing all the beneficial technical effects of the bearing, which will not be described in detail here.

[0156] According to a fourth aspect of the present invention, a refrigeration device is provided, comprising a bearing or a compressor as provided in any of the above embodiments, thereby possessing all the beneficial technical effects of the bearing or the compressor, which will not be described in detail here.

[0157] In this specification, the terms "connect," "install," and "fix" should be understood broadly. For example, "connect" can refer to a fixed connection, a detachable connection, or an integral connection; it can refer to a direct connection or an indirect connection through an intermediary. Those skilled in the art will understand the specific meanings of these terms in the present invention based on specific circumstances.

[0158] Throughout this specification, terms such as "one embodiment," "some embodiments," and "specific embodiments" mean that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0159] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A measuring device, characterized in that: include: A measuring piece, comprising a working surface and a measuring tool, wherein the measuring tool is provided on the working surface, and the working surface is used to accommodate the piece to be measured; An air circuit converter, the air circuit converter comprising an output port; A plurality of channels, wherein the air inlets of the plurality of channels are respectively provided on the air path converter, and the air outlets of the plurality of channels are respectively provided on the measuring tool; The detection flow path is arranged inside the gas path converter, one end of the detection flow path is connected to the output port, and the other end of the detection flow path is connected to the multiple air inlet holes. The detection flow path includes multiple working positions. When the detection flow path is switched to different working positions, the detection flow path has different connection states with the multiple air inlet holes, so that the measuring device can measure different parameters of the test piece.

2. The measuring device according to claim 1, characterized in that The plurality of channels include a first channel, a second channel, a third channel, and a fourth channel. Along the radial direction of the measuring tool, the first air outlet of the first channel and the second air outlet of the second channel are arranged opposite to each other, the third air outlet of the third channel and the fourth air outlet of the fourth channel are arranged opposite to each other, and along the axial direction of the measuring tool, the first air outlet and the fourth air outlet are arranged opposite to each other, and the second air outlet and the third air outlet are arranged opposite to each other; The detection flow path includes a first detection flow path and a second detection flow path, the plurality of working positions include a first working position and a second working position, and when the detection flow path is in the first working position, the first detection flow path is connected to the first air inlet of the first channel and the second air inlet of the second channel, and the second detection flow path is connected to the third air inlet of the third channel and the fourth air inlet of the fourth channel; Based on the detection flow path being in the second working position, the first detection flow path is connected to the first air inlet hole and the third air inlet hole, and the second detection flow path is connected to the second air inlet hole and the fourth air inlet hole.

3. The measuring device according to claim 2, characterized in that The output port includes a first output port and a second output port, the first detection flow path includes a first branch, a second branch, a third branch, and a fourth branch, the first branch, the second branch, the third branch, and the fourth branch are respectively connected to the first output port, the second detection flow path includes a fifth branch, a sixth branch, a seventh branch, and an eighth branch, the fifth branch, the sixth branch, the seventh branch, and the eighth branch are respectively connected to the second output port; Wherein, based on the detection flow path being in the first working position, the first branch is connected to the first air inlet, the second branch is connected to the second air inlet, the fifth branch is connected to the third air inlet, and the sixth branch is connected to the fourth air inlet; Based on the detection flow path being in the second working position, the third branch is connected to the first air inlet, the fourth branch is connected to the third air inlet, the seventh branch is connected to the second air inlet, and the eighth branch is connected to the fourth air inlet.

4. The measuring device according to claim 1, characterized in that The plurality of channels include a first channel, a second channel, a third channel, a fourth channel, a fifth channel, a sixth channel, a seventh channel, and an eighth channel. The first air outlet of the first channel, the second air outlet of the second channel, the third air outlet of the third channel, and the fourth air outlet of the fourth channel are arranged along the circumferential direction of the measuring tool. In the radial direction of the measuring tool, the first air outlet and the second air outlet are opposite to each other, the third air outlet and the fourth air outlet are opposite to each other, the fifth air outlet of the fifth channel, the sixth air outlet of the sixth channel, the seventh air outlet of the seventh channel, and the eighth air outlet of the eighth channel are arranged along the circumferential direction of the measuring tool. In the radial direction of the measuring tool, the fifth air outlet and the sixth air outlet are opposite to each other, the seventh air outlet and the eighth air outlet are opposite to each other, and in the axial direction of the measuring tool, the first air outlet and the fifth air outlet are opposite to each other, the second air outlet and the sixth air outlet are opposite to each other, the third air outlet and the seventh air outlet are opposite to each other, and the fourth air outlet and the eighth air outlet are opposite to each other. Wherein, the detection flow path includes a first detection flow path, a second detection flow path, a third detection flow path and a fourth detection flow path, the multiple working positions include a first working position and a second working position, when the detection flow path is in the first working position, the first detection flow path is connected to the first air inlet of the first channel and the second air inlet of the second channel, the second detection flow path is connected to the third air inlet of the third channel and the fourth air inlet of the fourth channel, the third detection flow path is connected to the fifth air inlet of the fifth channel and the sixth air inlet of the sixth channel, and the fourth detection flow path is connected to the seventh air inlet of the seventh channel and the eighth air inlet of the eighth channel; Based on the detection flow path being in the second working position, the first detection flow path connects the first air inlet hole and the sixth air inlet hole, the second detection flow path connects the second air inlet hole and the fifth air inlet hole, the third detection flow path connects the third air inlet hole and the eighth air inlet hole, and the fourth detection flow path connects the fourth air inlet hole and the seventh air inlet hole.

5. The measuring device according to claim 4, characterized in that The output port includes a first output port, a second output port, a third output port, and a fourth output port; the first detection flow path includes a first branch, a second branch, a third branch, and a fourth branch; the first branch, the second branch, the third branch, and the fourth branch are respectively connected to the first output port; the second detection flow path includes a fifth branch, a sixth branch, a seventh branch, and an eighth branch; the fifth branch, the sixth branch, the seventh branch, and the eighth branch are respectively connected to the second output port; the third detection flow path includes a ninth branch, a tenth branch, an eleventh branch, and a twelfth branch; the ninth branch, the tenth branch, the eleventh branch, and the twelfth branch are respectively connected to the third output port; the fourth detection flow path includes a thirteenth branch, a fourteenth branch, a fifteenth branch, and a sixteenth branch; the thirteenth branch, the fourteenth branch, the fifteenth branch, and the sixteenth branch are respectively connected to the fourth output port; Wherein, based on the detection flow path being in the first working position, the first branch is connected to the first air inlet, the second branch is connected to the second air inlet, the fifth branch is connected to the third air inlet, the sixth branch is connected to the fourth air inlet, the ninth branch is connected to the fifth air inlet, the tenth branch is connected to the sixth air inlet, the thirteenth branch is connected to the seventh air inlet, and the fourteenth branch is connected to the eighth air inlet; Based on the detection flow path being in the second working position, the third branch is connected to the first air inlet, the fourth branch is connected to the sixth air inlet, the seventh branch is connected to the second air inlet, the eighth branch is connected to the fifth air inlet, the eleventh branch is connected to the third air inlet, the twelfth branch is connected to the eighth air inlet, the fifteenth branch is connected to the fourth air inlet, and the sixteenth branch is connected to the seventh air inlet.

6. The measuring device according to any one of claims 1 to 5, characterized in that Also includes: The switch module is provided in the detection flow path and is used to switch the detection flow path to different working positions.

7. The measuring device according to any one of claims 1 to 5, characterized in that The central axis of the measuring tool is perpendicular to the working surface.

8. The measuring device according to any one of claims 1 to 5, characterized in that Also includes: The protective member is arranged at one end of the measuring tool away from the working surface and is connected to the measuring tool.

9. The measuring device according to any one of claims 1 to 5, characterized in that Also includes: The positioning structure is arranged on the working surface.

10. The measuring device according to any one of claims 1 to 5, characterized in that The measuring element further comprises: Support frame; A support platform is provided on the support frame, and the working surface is provided on a side of the support platform facing away from the support frame; A mounting plate is provided on a side of the support frame away from the support platform, and the mounting plate is provided with a plurality of interfaces; Each of the multiple channels includes two sub-channels, one end of one of the sub-channels includes the air inlet and the other end is connected to one of the interfaces, and one end of the other sub-channel includes the air outlet and the other end is connected to the interface.

11. The measuring device according to claim 10, characterized in that The support platform comprises: A first support plate, provided on the support frame; a second support plate, provided on a side of the first support plate facing away from the support frame, wherein the working surface is provided on a side of the second support plate facing away from the first support plate; Wherein, the hardness of the second support plate is greater than the hardness of the first support plate.

12. The measuring device according to claim 10, characterized in that The support frame comprises: A body, wherein the support platform and the mounting plate are respectively located on two sides of the body along the axial direction of the measuring tool; A plurality of legs are arranged on a side of the body away from the support platform, so that the mounting plate is suspended in the air on a side away from the body.

13. A bearing, characterized in that: The parameter is measured by a measuring device according to any one of claims 1 to 12.

14. A compressor, characterized in that: Comprising the bearing of claim 13.

15. A refrigeration device, characterized in that: include: The bearing according to claim 13; or the compressor according to claim 14.

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