Height difference automatic measuring device

Abstract

The utility model provides a kind of height difference automatic measuring device, it is related to measuring equipment technical field, solve the technical problem of easy damage to stator and rotor when measuring, big measurement error.The height difference automatic measuring device is set above assembly line, to measure the height difference of stator and rotor in compressor assembly conveyed on assembly line, measuring device includes rack, drive assembly, measuring assembly, buffer installation component;Drive assembly is installed on rack;Measuring assembly is connected with drive assembly by buffer installation component;Measuring assembly includes linear displacement sensor.The utility model drives measuring assembly down by drive assembly, realizes flexible contact stator end face or shell end face by buffer installation component, avoids damage caused by rigid impact;Measuring assembly real-time acquisition the relative displacement difference of both, accurately obtains height difference data, improves measurement repeatability and safety, satisfies on-line full inspection demand.

Description

Technical Field

[0001] This utility model relates to the field of measuring equipment technology, and in particular to an automatic measuring device for the height difference between the stator and rotor of a compressor. Background Technology

[0002] There are requirements for the height difference between the stator and rotor in the compressor during assembly. After assembly, personnel need to check 100% of the height difference to see if it meets the requirements. This is a high-intensity task, and the compressor casing is at a high temperature of about 80 degrees Celsius at this time, which can easily burn the inspectors.

[0003] To address this issue, existing technology discloses an automated online inspection device for compressor pump assembly. When measuring height, it uses a lifting cylinder to directly press the stator positioning plate against the stator end face. This positioning method lacks buffering, which can easily damage the stator and cause measurement errors due to high pressure. In addition, the device uses an infrared sensor to determine whether the height difference is within a certain range, which cannot accurately obtain the height difference value for each measurement, making it inconvenient to use. Utility Model Content

[0004] The purpose of this utility model is to provide an automatic measuring device for the height difference between the stator and rotor of a compressor, so as to solve the technical problems of easy damage to the stator and rotor and large measurement error in the existing technology.

[0005] To achieve the above objectives, the present invention provides the following technical solution: This utility model provides an automatic height difference measuring device, installed above an assembly line, for measuring the height difference between the stator and rotor in a compressor assembly conveyed on the assembly line. The measuring device includes a frame, a drive assembly, a measuring assembly, and a buffer mounting assembly; wherein: The drive assembly is mounted on the rack; The measuring component is connected to the driving component via the buffer mounting component.

[0006] The automatic height difference measuring device of this utility model drives the measuring component to move downward through the driving component, and achieves flexible contact with the end face of the stator and rotor or the end face of the housing through the buffer installation component, avoiding damage caused by rigid impact; the measuring component collects the relative displacement difference between the two in real time, accurately obtains the height difference data, improves the measurement repeatability and safety, and meets the requirements of online full inspection.

[0007] Based on the above technical solution, the present invention can be further improved as follows.

[0008] As a further improvement of this utility model, the buffer mounting assembly includes a lifting plate, a first elastic element, and a floating plate; wherein: The lifting plate is connected to the drive assembly; The floating plate is located below the lifting plate and is connected to the lifting plate through the first elastic element; The measuring component is mounted on the floating plate.

[0009] The buffer mounting assembly of this utility model, through the elastic action of the first elastic element, enables the floating plate and the measuring assembly mounted thereon to have a buffer stroke when contacting the stator and rotor end faces or the housing end faces, effectively mitigating the impact force at the moment of contact and avoiding damage to the stator or rotor surface caused by rigid pressing; at the same time, it ensures that the measuring assembly completes the height difference acquisition under stable pre-pressure, improving the repeatability accuracy of the detection.

[0010] As a further improvement of this utility model, the first elastic element is a spring. The spring has a stable structure, low cost, and is easy to install and maintain. It can effectively provide uniform preload, ensuring the compliance and consistency of the measuring component when in contact with the stator and rotor end faces. It maintains good elastic performance even under long-term, high-frequency operating conditions, extending the service life of the device and reducing the failure rate. The spring selection is optimized and matched according to the measuring stroke and preload requirements to ensure stable buffering effect and contact force when switching between different compressor models.

[0011] As a further improvement of this utility model, it also includes a fixing plate located above the lifting plate, the fixing plate being connected to the lifting plate via the first elastic member.

[0012] The above structural design further enhances the buffer distance, allowing the measuring component to have a longer flexible contact stroke during descent, effectively adapting to stator and rotor combinations of different heights. The first elastic element between the fixed plate and the lifting plate, together with the first elastic element below the floating plate, forms a bidirectional elastic buffer structure, enhancing the system's height adaptability and contact stability for different compressor models. At the instant the measuring component contacts the end face, the upper and lower double-sided springs work together to compress, evenly dispersing the impact force and avoiding uneven loading or local stress concentration, further improving measurement repeatability and equipment reliability.

[0013] As a further improvement of this utility model, it also includes a guide rod, which passes through the first elastic member.

[0014] The measuring component and lifting plate of this invention can achieve vertical movement through the guide rods on both sides, avoiding the impact of lateral load on measurement accuracy.

[0015] As a further improvement of this utility model, the measuring component includes a measuring claw, a measuring head, a mounting base, a mounting rod, a guide cylinder, and a first linear displacement sensor; wherein: The guide cylinder is connected at both ends to the floating plate and the mounting base, respectively. The first linear displacement sensor is installed at the bottom of the lifting plate; After the upper part of the mounting rod passes through the guide cylinder and the floating plate in sequence, it can be contacted and connected to the probe of the first linear displacement sensor of the first linear displacement sensor. The lower part of the mounting rod is limited and inserted into the mounting base; The probe is installed at the lower end of the mounting rod; The probe claw is arranged around the probe head and connected to the mounting base.

[0016] The measuring component of this invention features a guide cylinder, a sliding mounting rod within the guide cylinder and mounting base, and a probe mounted at the end of the mounting rod. This design ensures excellent vertical guidance and motion stability for the probe, effectively reducing swaying and deviation during measurement. The fixed connection between the measuring claw and the mounting base enhances the overall structural rigidity, ensuring uniform force distribution when the measuring component contacts the stator and rotor end faces, preventing measurement deviations caused by structural deformation. The measuring claw's arrangement around the probe effectively protects it from external impacts, extending its service life. Combined with real-time feedback from a first linear displacement sensor, the specific values ​​for each measurement can be accurately obtained, enabling data-driven quality monitoring. This design is suitable for high-temperature and continuous operation environments, reducing the risk of human intervention.

[0017] As a further improvement of this utility model, a second elastic element is also included, which is disposed between the mounting rod and the guide cylinder.

[0018] The second elastic element enables the mounting rod to have preload and floating compensation capabilities within the guide cylinder. When the probe contacts the stator and rotor end faces, the second elastic element can absorb minor impacts and automatically compensate for assembly height errors, ensuring that the probe always completes the measurement action with a constant contact force. At the same time, when the end face height changes due to compressor model switching, the second elastic element, together with the upper and lower first elastic elements, achieves multi-level buffering, further improving the adaptive capability and repeatability of the measurement system, and ensuring the stability and reliability of data acquisition.

[0019] As a further improvement of this utility model, the mounting rod is provided with a raised truncated cone, one end of the second elastic member abuts against the raised truncated cone, and the other end abuts against the bottom of the floating plate.

[0020] This invention achieves stable transmission of elastic preload by setting a raised frustum on the mounting rod and having the two ends of the second elastic element abut against the raised frustum and the floating plate respectively. When the probe contacts the workpiece, the raised frustum acts as a force fulcrum, effectively preventing the second elastic element from shifting or jamming, ensuring a smooth and reliable compression and rebound process. This structure not only enhances the axial floating sensitivity of the mounting rod in the guide cylinder, but also improves the adaptive response speed of the measuring component to stators and rotors of different heights, further ensuring the dynamic stability of the probe at the moment of contact and the consistency of the measurement results.

[0021] As a further improvement of this utility model, the specifications of the mounting rod located at the bottom of the raised frustum are equal to the specifications of the through hole of the mounting base; the diameter of the raised frustum is larger than the diameter of the through hole of the mounting base.

[0022] This invention creates a stepped structure at the bottom of the mounting rod, forming a limiting fit between the raised frustum and the through hole of the mounting base. This effectively constrains the axial travel of the mounting rod, preventing excessive downward movement that could damage the probe due to overpressure. Simultaneously, this stepped structure allows for rapid positioning during assembly, improving assembly efficiency.

[0023] As a further improvement of this utility model, the top of the floating plate extends upward to form a rod-through tube; the upper part of the mounting rod passes through the rod-through tube.

[0024] By setting up a through-tube, precise guidance and matching between the floating plate and the mounting rod are achieved, ensuring that the mounting rod maintains coaxiality during the up-and-down floating process and avoiding guide jamming or wear caused by eccentric movement. The inner wall of the through-tube and the outer diameter of the mounting rod adopt a clearance fit, which not only ensures flexible sliding but also effectively suppresses vibration transmission, further improving the dynamic stability and repeatability accuracy of the measurement system.

[0025] As a further improvement of this utility model, the measuring component includes two second linear displacement sensors and two height probes; wherein: Two second linear displacement sensors are respectively mounted on the floating plate; The two height probes are respectively mounted on the two second linear displacement sensors.

[0026] As a further improvement of this utility model, the drive assembly includes a double-rod lifting cylinder.

[0027] This invention employs a double-rod lifting cylinder as the driving component, with two piston rods applying force synchronously to the floating plate. This ensures that the mounting rod is subjected to balanced force during lifting, effectively avoiding tilting or jamming caused by unilateral force, and improving the stability and synchronization of the probe's lifting action. The double-rod structure is more rigid in stroke control, and with the help of sensors, it can achieve precise position feedback, ensuring that the probe maintains a vertical posture at the moment of contact with the workpiece, thus reducing measurement errors. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a three-dimensional structural schematic diagram of one embodiment of the automatic height difference measuring device of this utility model; Figure 2 This is a cross-sectional view of the buffer mounting assembly in one embodiment of the automatic height difference measuring device of this utility model; Figure 3 This is a cross-sectional view of the measuring component and the buffer mounting component in one embodiment of the automatic height difference measuring device of this utility model; Figure 4 This is a schematic diagram of the structure of an embodiment of the automatic height difference measuring device of this utility model during measurement; Figure 5 This is a three-dimensional structural schematic diagram of another embodiment of the automatic height difference measuring device of this utility model; Figure 6 This is a front view of another embodiment of the automatic height difference measuring device of this utility model during measurement; Figure 7 This is a rear view during measurement of another embodiment of the automatic height difference measuring device of this utility model; Figure 8 This is a front sectional view of the compressor assembly measured by the automatic height difference measuring device of this utility model.

[0030] In the picture: 1. Rack; 2. Double-rod lifting cylinder; 3. Measurement components; 31. Measuring claw; 32. Probe; 33. Mounting base; 331. Base plate; 34. Mounting rod; 35. Guide cylinder; 36. Second elastic element; 4. Buffer installation components; 41. Lifting plate; 42. First elastic element; 43. Floating plate; 431. Inserting a tube through a pole; 44. Fixing plate; 45. Guide rod; 5. First linear displacement sensor; 51. First linear displacement sensor probe; 6. Second linear displacement sensor; 61. Stator height measuring head; 62. Rotor height measuring head; 100. Assembly line; 200. Compressor assembly; 201. Rotor core end face; 202. Stator core end face; 203. Stator core; 204. Rotor core; 205. Shell. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0032] Example 1: like Figures 1-4 As shown, in this embodiment, the present invention provides an automatic height difference measuring device, which is installed above the assembly line 100 to measure the height difference between the stator and rotor in the compressor assembly 200 conveyed on the assembly line 100. The measuring device includes a frame 1, a drive assembly, a measuring assembly 3, and a buffer mounting assembly 4; wherein: The drive assembly is mounted on rack 1; The measuring component 3 is connected to the driving component via the buffer mounting component 4.

[0033] like Figure 8 As shown, specifically in this embodiment, the compressor assembly 200 includes a housing 205, a stator core 203 disposed within the housing 205, and a rotor core 204; the stator core 203 has a stator core end face 202, and the rotor core 204 has a rotor core end face 201. The housing 205 has a housing 205 end face.

[0034] In this embodiment, the automatic height difference measuring device drives the measuring component 3 downward through the driving component, and achieves flexible contact with the stator and rotor end faces through the buffer mounting component 4, avoiding damage caused by rigid impact; the measuring component 3 collects the relative displacement difference between the two in real time, accurately obtains the height difference data, improves the measurement repeatability accuracy and safety, and meets the requirements of online full inspection.

[0035] Furthermore, the buffer mounting assembly 4 includes a lifting plate 41, a first elastic element 42, and a floating plate 43; wherein: The lifting plate 41 is connected to the drive assembly; The floating plate 43 is located below the lifting plate 41 and is connected to the lifting plate 41 through the first elastic element 42; The measuring component 3 is mounted on the floating plate 43.

[0036] The buffer mounting assembly 4 of this utility model, through the elastic action of the first elastic element 42, enables the floating plate 43 and the measuring assembly 3 mounted thereon to have a buffer stroke when contacting the stator and rotor end faces or the housing 205 end face, effectively alleviating the impact force at the moment of contact and avoiding damage to the stator or rotor surface caused by rigid pressing; at the same time, it ensures that the measuring assembly 3 completes the height difference acquisition under stable pre-pressure, improving the repeatability accuracy of the detection.

[0037] Specifically, in this embodiment, the first elastic element 42 is a cylindrical spring. The spring has a stable structure, low cost, and is easy to install and maintain. It can effectively provide uniform preload, ensuring the compliance and consistency of the measuring component 3 when in contact with the stator and rotor end faces. It maintains good elastic performance even under long-term, high-frequency operating conditions, extending the device's service life and reducing the failure rate. The spring selection is optimized based on the measuring stroke and preload requirements to ensure stable buffering effect and contact force when switching between different compressor models.

[0038] To improve the cushioning effect, a fixed plate 44 is also included above the lifting plate 41, and the fixed plate 44 is connected to the lifting plate 41 through a first elastic member 42. When the lifting plate 41 is raised and lowered by the drive assembly, the fixed plate 44 and the floating plate 43 rise and fall together.

[0039] Through the above structural design, the buffer distance is further improved, enabling the measuring component 3 to have a longer flexible contact stroke during the downward movement, effectively adapting to stator and rotor combinations of different height specifications; the first elastic element 42 between the fixed plate 44 and the lifting plate 41, together with the first elastic element 42 below the floating plate 43, forms a bidirectional elastic buffer structure, enhancing the system's height adaptability and contact stability for different compressor models; at the instant the measuring component 3 contacts the end face, the upper and lower double-sided springs work together to compress, evenly dispersing the impact force, avoiding uneven load or local stress concentration, further improving the measurement repeatability accuracy and equipment reliability.

[0040] To ensure stable lifting, a guide rod 45 is also included, which passes through the first elastic member 42.

[0041] Specifically, the top of the guide rod 45 is connected to the fixed plate 44, the bottom is connected to the floating plate 43, and it slides through the lifting plate 41 in the middle.

[0042] The measuring component 3 and the lifting plate 41 of this utility model can achieve vertical movement through the guide rods 45 on both sides, so as to avoid the influence of lateral load on the measurement accuracy.

[0043] In this embodiment, the measuring component 3 includes a measuring claw 31, a measuring head 32, a mounting base 33, a mounting rod 34, a guide cylinder 35, and a first linear displacement sensor 5; wherein: The guide cylinder 35 is connected to the floating plate 43 and the mounting base 33 at both ends via flanges, respectively. The first linear displacement sensor 5 is installed at the bottom of the lifting plate 41; After passing through the guide cylinder 35 and the floating plate 43 in sequence, the upper part of the mounting rod 34 can be contacted and connected to the first linear displacement sensor probe 51 of the first linear displacement sensor 5. The lower part of the mounting rod 34 is limited and inserted into the mounting base 33; The probe 32 is installed at the lower end of the mounting rod 34; The measuring claw 31 is arranged around the measuring head 32 and is connected to the mounting base 33.

[0044] The measuring component 3 of this invention features a guide cylinder 35, a mounting rod 34 slidably disposed within the guide cylinder 35 and mounting base 33, and a probe 32 mounted at the end of the mounting rod 34. This design ensures good guidance and stability of the probe 32 in the vertical direction, effectively reducing swaying and deviation during measurement. The fixed connection between the measuring claw 31 and the mounting base 33 enhances the overall structural rigidity, ensuring uniform force distribution when the measuring component 3 contacts the stator and rotor end faces, preventing measurement deviations caused by structural deformation. The measuring claw 31, arranged around the probe 32, effectively protects the probe 32 from external impacts, extending its service life. Combined with real-time feedback from the first linear displacement sensor 5, the specific values ​​of each measurement can be accurately obtained, enabling data-driven quality monitoring. This design is suitable for high-temperature and continuous operation environments, reducing the risk of human intervention.

[0045] As a further improvement of this utility model, a second elastic element 36 is also included, which is disposed between the mounting rod 34 and the guide cylinder 35.

[0046] The second elastic element 36 enables the mounting rod 34 to have preload and floating compensation capabilities within the guide cylinder 35. When the probe 32 contacts the stator and rotor end faces, the second elastic element 36 can absorb minor impacts and automatically compensate for assembly height errors, ensuring that the probe 32 always completes the measurement action with a constant contact force. At the same time, when the end face height changes due to compressor model switching, the second elastic element 36, together with the upper and lower first elastic elements 42, achieves multi-level buffering, further improving the adaptive capability and repeatability of the measurement system, and ensuring the stability and reliability of data acquisition.

[0047] In this embodiment, the second elastic element 36 can be a cylindrical spring.

[0048] To facilitate the fixing of the spring, a raised truncated cone is provided on the mounting rod 34. One end of the second elastic element 36 abuts against the raised truncated cone, and the other end abuts against the bottom of the floating plate 43.

[0049] This invention achieves stable transmission of elastic preload by setting a raised frustum on the mounting rod 34 and having the two ends of the second elastic element 36 abut against the raised frustum and the floating plate 43 respectively. When the probe 32 contacts the workpiece, the raised frustum acts as a force fulcrum, effectively preventing the second elastic element 36 from shifting or getting stuck, ensuring a smooth and reliable compression and rebound process. This structure not only enhances the axial floating sensitivity of the mounting rod 34 within the guide cylinder 35, but also improves the adaptive response speed of the measuring component 3 to stators and rotors of different heights, further ensuring the dynamic stability of the probe 32 at the moment of contact and the consistency of the measurement results.

[0050] To prevent the mounting rod 34 from coming off the mounting base 33, the mounting rod 34 located at the bottom of the raised frustum has the same specifications as the through hole of the mounting base 33; the diameter of the raised frustum is larger than the diameter of the through hole of the mounting base 33.

[0051] This invention forms a stepped structure at the lower part of the mounting rod 34, creating a limiting fit between the raised truncated cone and the through hole of the mounting base 33. This effectively constrains the axial travel of the mounting rod 34, preventing it from excessively moving downwards and causing overpressure damage to the probe 32. At the same time, this stepped structure enables rapid positioning during assembly, improving assembly efficiency.

[0052] As a further improvement of this utility model, the top of the floating plate 43 extends upward to form a rod-through tube 431; the upper part of the mounting rod 34 passes through the rod-through tube 431.

[0053] By setting the through-tube 431, the floating plate 43 and the mounting rod 34 are precisely guided and matched, ensuring that the mounting rod 34 maintains coaxiality during the up and down floating process, and avoiding guide jamming or wear caused by eccentric movement; the inner wall of the through-tube 431 and the outer diameter of the mounting rod 34 adopt a clearance fit, which not only ensures flexible sliding, but also effectively suppresses vibration transmission, further improving the dynamic stability and repeatability of the measurement system.

[0054] As a further improvement of this utility model, the drive assembly includes a double-rod lifting cylinder 2.

[0055] This invention employs a double-rod lifting cylinder 2 as the driving component, with two piston rods simultaneously applying force to the floating plate 43. This ensures that the mounting rod 34 experiences balanced force during lifting, effectively preventing tilting or jamming caused by unilateral force and improving the stability and synchronicity of the probe 32's lifting action. The double-rod structure provides greater rigidity in stroke control, and in conjunction with a sensor, it enables precise position feedback, ensuring that the probe 32 maintains a vertical posture at the moment of contact with the workpiece, thus reducing measurement errors.

[0056] This utility model's automatic height difference measuring device replaces manual measurement. Using automated equipment, it automatically descends to measure the height difference between the stator and rotor after they reach their positions on the production line 100. This achieves 100% measurement accuracy of the stator-rotor height difference and displays the measured values ​​in real time. The measurement is accurate and efficient, reducing the labor intensity of manual operation and avoiding burns. The automatic detection equipment has a simple structure and a low failure rate. To achieve automation, an alarm module can be installed in the device. When the height difference detected by the first linear displacement sensor 5 exceeds a preset value, the control system sends a command to the alarm module to automatically trigger an alarm, thus achieving a high level of automation and meeting the automation requirements of the production line.

[0057] In this embodiment, the connection method of each component in the automatic height difference measuring device is as follows: The frame 1 provides overall support. The double-rod lifting cylinder 2 is fixedly connected to the frame 1. The lifting plate 41 is connected to the double-rod lifting cylinder 2 and moves up and down with the extension and retraction of the double-rod lifting cylinder 2. The first linear displacement sensor 5 is fixed to the lifting plate 41. The floating plate 43 is connected to the lifting plate 41 via a guide rod 45 and a first elastic element 42 (spring) sleeved on the guide rod 45, allowing it to move up and down under the action of the spring. The guide cylinder 35 is fixedly connected to the floating plate 43, and the base plate 331 is fixedly connected to the guide cylinder 35. The measuring claw 31 mounting base 33 is fixedly connected to the base plate 331, and the measuring claw 31 is fixed to the measuring claw 31 mounting base 33. The mounting rod 34 passes through the floating plate 43, guide cylinder 35, base plate 331, and measuring claw 31 mounting base 33, with a second elastic element 36 (such as a spring) in the middle, allowing it to move up and down. The measuring head 32 is mounted on the measuring head 32 mounting rod 34 and moves with the measuring head 32 mounting rod 34.

[0058] The height difference detection process is as follows: The state of each mechanism when it is not in motion is as follows Figure 2 As shown, the end of the probe 32 is lower than the end of the claw 31 by a distance H1. There is a gap H2 between the mounting rod 34 and the probe 32 of the first linear displacement sensor 5. When the probe 32 and the mounting rod 34 move upward during measurement, the displacement sensor will be triggered when the top of the mounting rod 34 contacts the probe 32 of the first linear displacement sensor 5 and continues to rise. Therefore, it is necessary to ensure that H1 > H2.

[0059] Calibration to zero: such as Figure 3 As shown, the actions of each component are as follows: the lifting plate 41 descends under the action of the lifting cylinder, and during the descent, the floating plate 43, along with the components connected to it, ( Figure 2 The entire structure descends, with the end face of probe 32 first contacting the calibration plate. Then, probe 32 and mounting rod 34 move upwards. Before probe claw 31 contacts the calibration plate, floating plate 43 continues to move downwards. After probe claw 31 contacts floating plate 43, the spring at the bottom of lifting plate 41 contracts to buffer the movement and prevent the entire structure from continuing to descend. At this time, because H1 > H2, mounting rod 34 pushes the probe 32 of the first linear displacement sensor 5 upwards, causing the probe 32 of the first linear displacement sensor 5 to rise and reset the data measured by the first linear displacement sensor 5 to zero.

[0060] Measure the height difference between the stator and rotor, such as Figure 4 As shown: the actions of each component are generally the same when calibrating to zero. The main difference is that there is a height difference between the stator and rotor cores 204 at this time. When the end face of the probe 31 and the end face of the probe 32 contact the stator core 203 and the rotor core 204 respectively, the distance that the mounting rod 34 and the probe 32 of the first linear displacement sensor 5 move upward is greater than that when calibrating to zero. The difference between the two is the height difference between the stator and rotor at this time.

[0061] Example 2: like Figures 5-7 As shown, in this embodiment, the present invention provides an automatic height difference measuring device, which is installed above the assembly line 100 to measure the height difference between the stator and rotor in the compressor assembly 200 conveyed on the assembly line 100. The measuring device includes a frame 1, a drive assembly, a measuring assembly 3, and a buffer mounting assembly 4; wherein: The drive assembly is mounted on rack 1; The measuring component 3 is connected to the driving component via the buffer mounting component 4.

[0062] like Figure 8 As shown, specifically in this embodiment, the compressor assembly 200 includes a housing 205, a stator core 203 disposed within the housing 205, and a rotor core 204; the stator core 203 has a stator core end face 202, and the rotor core 204 has a rotor core end face 201. The housing 205 has a housing 205 end face.

[0063] In this embodiment, the automatic height difference measuring device drives the measuring component 3 downward through the driving component, and achieves flexible contact with the end face of the housing 205 through the buffer mounting component 4, avoiding damage caused by rigid impact; the measuring component 3 collects the relative displacement difference between the two in real time, accurately obtains the height difference data, improves the measurement repeatability and safety, and meets the requirements of online full inspection.

[0064] Furthermore, the buffer mounting assembly 4 includes a lifting plate 41, a first elastic element 42, and a floating plate 43; wherein: The lifting plate 41 is connected to the drive assembly; The floating plate 43 is located below the lifting plate 41 and is connected to the lifting plate 41 through the first elastic element 42; The measuring component 3 is mounted on the floating plate 43.

[0065] The buffer mounting assembly 4 of this utility model, through the elastic action of the first elastic element 42, enables the floating plate 43 and the measuring assembly 3 mounted thereon to have a buffer stroke when contacting the stator and rotor end faces or the housing 205 end face, effectively alleviating the impact force at the moment of contact and avoiding damage to the stator or rotor surface caused by rigid pressing; at the same time, it ensures that the measuring assembly 3 completes the height difference acquisition under stable pre-pressure, improving the repeatability accuracy of the detection.

[0066] Specifically, in this embodiment, the first elastic element 42 is a cylindrical spring. The spring has a stable structure, low cost, and is easy to install and maintain. It can effectively provide uniform preload, ensuring the compliance and consistency of the measuring component 3 when in contact with the stator and rotor end faces. It maintains good elastic performance even under long-term, high-frequency operating conditions, extending the device's service life and reducing the failure rate. The spring selection is optimized based on the measuring stroke and preload requirements to ensure stable buffering effect and contact force when switching between different compressor models.

[0067] To improve the cushioning effect, a fixed plate 44 is also included above the lifting plate 41, and the fixed plate 44 is connected to the lifting plate 41 through a first elastic member 42. When the lifting plate 41 is raised and lowered by the drive assembly, the fixed plate 44 and the floating plate 43 rise and fall together.

[0068] Through the above structural design, the buffer distance is further improved, enabling the measuring component 3 to have a longer flexible contact stroke during the downward movement, effectively adapting to stator and rotor combinations of different height specifications; the first elastic element 42 between the fixed plate 44 and the lifting plate 41, together with the first elastic element 42 below the floating plate 43, forms a bidirectional elastic buffer structure, enhancing the system's height adaptability and contact stability for different compressor models; at the instant the measuring component 3 contacts the end face, the upper and lower double-sided springs work together to compress, evenly dispersing the impact force, avoiding uneven load or local stress concentration, further improving the measurement repeatability accuracy and equipment reliability.

[0069] To ensure stable lifting, a guide rod 45 is also included, which passes through the first elastic member 42.

[0070] Specifically, the top of the guide rod 45 is connected to the fixed plate 44, the bottom is connected to the floating plate 43, and it slides through the lifting plate 41 in the middle.

[0071] The measuring component 3 and the lifting plate 41 of this utility model can achieve vertical movement through the guide rods 45 on both sides, so as to avoid the influence of lateral load on the measurement accuracy.

[0072] In this embodiment, the measuring component 3 includes two second linear displacement sensors 6 and two height probes; wherein: Two second linear displacement sensors 6 are respectively installed on the floating plate 43; Two height probes are respectively mounted on two second linear displacement sensors 6.

[0073] The two height probes are stator height probe 61 and rotor height probe 62.

[0074] As a further improvement of this utility model, the top of the floating plate 43 extends upward to form a rod-through tube 431; the upper part of the mounting rod 34 passes through the rod-through tube 431.

[0075] By setting the through-tube 431, the floating plate 43 and the mounting rod 34 are precisely guided and matched, ensuring that the mounting rod 34 maintains coaxiality during the up and down floating process, and avoiding guide jamming or wear caused by eccentric movement; the inner wall of the through-tube 431 and the outer diameter of the mounting rod 34 adopt a clearance fit, which not only ensures flexible sliding, but also effectively suppresses vibration transmission, further improving the dynamic stability and repeatability of the measurement system.

[0076] As a further improvement of this utility model, the drive assembly includes a double-rod lifting cylinder 2.

[0077] This invention employs a double-rod lifting cylinder 2 as the driving component, with two piston rods simultaneously applying force to the floating plate 43. This ensures that the mounting rod 34 experiences balanced force during lifting, effectively preventing tilting or jamming caused by unilateral force and improving the stability and synchronization of the lifting movements of the two height probes. The double-rod structure provides greater rigidity in stroke control, and in conjunction with sensors, it enables precise position feedback, ensuring that the two height probes maintain a vertical posture at the moment of contact with the workpiece, thus reducing measurement errors.

[0078] like Figure 5 , Figure 6 and Figure 7As shown, in this embodiment, the automatic height difference measuring device operates as follows: Before testing, the rotor height probe 62 and stator height probe 61 are calibrated to zero on the same horizontal plane. The double-rod lifting cylinder 2 lowers the lifting plate 41. The guide rod 45 and the floating plate 43 are fixedly connected and connected to the lifting plate 41 through the guide rod 45, the first elastic element 42 (such as a spring), and the second linear displacement sensor 6. The floating plate 43 is fixedly connected to the second linear displacement sensor 6. When the lifting plate 41 lowers, the floating plate 43 also lowers. When the floating plate 43 contacts the upper end face of the housing 205, it stops moving. Under the action of the guide rod 45 and the first elastic element 42, the double-rod lifting cylinder 2 moves downward without causing the floating plate 43 to squeeze the housing 205. When the floating plate 43 contacts the end face of the housing 205 and stops falling, the rotor height probe 62 and the stator height probe 61 will contact the rotor core end face 201 and the stator core end face 202. The difference in displacement value read by the second linear displacement sensor 6 is the height difference between the rotor and the stator.

[0079] First, it should be noted that "inward" refers to the direction towards the center of the storage space, while "outward" refers to the direction away from the center of the storage space.

[0080] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the appendix. Figure 1 The orientations or positional relationships shown are for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0081] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0082] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0083] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0084] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above 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 one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0085] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. An automatic height difference measuring device, characterized in that, A measuring device is positioned above the assembly line to measure the height difference between the stator and rotor of a compressor assembly conveyed on the assembly line. The measuring device includes a frame, a drive assembly, a measuring assembly, and a buffer mounting assembly; wherein: The drive assembly is mounted on the rack; The measuring component is connected to the driving component via the buffer mounting component; The buffer mounting assembly includes a lifting plate, a first elastic element, and a floating plate; the lifting plate is connected to the driving assembly; the floating plate is located below the lifting plate and is connected to the lifting plate through the first elastic element; the measuring assembly is mounted on the floating plate; and the first linear displacement sensor in the measuring assembly is mounted on the bottom of the lifting plate.

2. The automatic height difference measuring device according to claim 1, characterized in that, It also includes a fixed plate located above the lifting plate, the fixed plate being connected to the lifting plate via the first elastic member.

3. The automatic height difference measuring device according to claim 1 or 2, characterized in that, It also includes a guide rod, which passes through the first elastic member.

4. The automatic height difference measuring device according to claim 1 or 2, characterized in that, The measuring assembly includes a measuring claw, a measuring head, a mounting base, a mounting rod, and a guide cylinder; wherein: The guide cylinder is connected at both ends to the floating plate and the mounting base, respectively. After the upper part of the mounting rod passes through the guide cylinder and the floating plate in sequence, it can be contacted and connected to the probe of the first linear displacement sensor of the first linear displacement sensor. The lower part of the mounting rod is limited and inserted into the mounting base; The probe is installed at the lower end of the mounting rod; The probe claw is arranged around the probe head and connected to the mounting base.

5. The automatic height difference measuring device according to claim 4, characterized in that, It also includes a second elastic element disposed between the mounting rod and the guide cylinder.

6. The automatic height difference measuring device according to claim 5, characterized in that, The mounting rod is provided with a raised truncated cone, and one end of the second elastic element abuts against the raised truncated cone, while the other end abuts against the bottom of the floating plate.

7. The automatic height difference measuring device according to claim 6, characterized in that, The mounting rod located at the bottom of the raised frustum has the same specifications as the through hole of the mounting base; the diameter of the raised frustum is larger than the diameter of the through hole of the mounting base.

8. The automatic height difference measuring device according to claim 4, characterized in that, The top of the floating plate extends upward to form a through-tube; the upper part of the mounting rod passes through the through-tube.

9. The automatic height difference measuring device according to claim 1 or 2, characterized in that, The measurement assembly includes two second linear displacement sensors and two height probes; wherein: The two second linear displacement sensors are respectively mounted on the floating plate; The two height probes are respectively mounted on the two second linear displacement sensors.

10. The automatic height difference measuring device according to claim 1, characterized in that, The drive assembly includes a dual-rod lifting cylinder.

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