Automatic cold pressing mechanism for rotor

Abstract

The utility model discloses a rotator automatic cold pressing mechanism, including the frame component, the frame component is installed with the jacking assembly, the jacking assembly side is provided with the positioning component, the frame component top inner wall still is provided with the measuring assembly corresponding to the jacking assembly, wherein, still be provided with the lifting mechanism between the measuring assembly and the jacking assembly, the jacking assembly can press into the crankcase that the rotator is arranged on the lifting mechanism from below to above, wherein, the positioning component can lift the lifting mechanism together with the crankcase to the preset test height of each item to be measured parameter and fixed. The jacking assembly is perpendicular to the lifting mechanism, and the rotator is pressed into the crankcase from below to above, and the traditional heating link is eliminated. The positioning component cooperates laterally, and the lifting mechanism is lifted to the preset height together with the crankcase and is locked, and the artificial positioning deviation is solved. The measuring assembly is placed on the top corresponding jacking station, and the real-time monitoring of the press-fit process is realized.

Description

Technical Field

[0001] This utility model relates to the field of compressor manufacturing technology, and in particular to an automatic rotor cooling and pressing mechanism. Background Technology

[0002] In the field of refrigeration equipment, the compressor is the core component that realizes the refrigeration cycle. Its working principle relies on the motor driving the crankshaft to rotate, and the crankshaft cranks drive the connecting rod and piston to reciprocate within the cylinder. In this process, the compressor draws in low-temperature, low-pressure refrigerant gas from the suction pipe, compresses it through the piston, transforms it into high-temperature, high-pressure gas, and discharges it from the exhaust pipe, thus providing power for the refrigeration cycle of compression → condensation → expansion → evaporation. Small refrigeration systems such as household and commercial refrigerators widely use this type of compressor, and its operational stability directly depends on the precision of the fit of its internal moving parts, especially the axial clearance control between the crankshaft and connecting rod. If the axial clearance is too small, the crankshaft is prone to jamming during rotation; if the clearance is too large, abnormal noise will be generated and component wear will be accelerated. Therefore, accurately controlling the crankshaft axial clearance is a key technical requirement to ensure the reliability and lifespan of the compressor.

[0003] Traditional compressor assembly primarily uses manual heat fitting to fix the rotor to the crankshaft. This process requires heating the crankshaft to a high temperature, using thermal expansion to fit the rotor into the crankshaft, and then allowing it to cool to form an interference fit. However, this method has significant drawbacks: firstly, the heating process consumes a large amount of energy, failing to meet the energy-saving requirements of modern manufacturing; secondly, high-temperature operation poses a risk of burns to workers, and improper temperature control during heat fitting can easily lead to component deformation. More importantly, because the crankshaft is in a moving position on the workpiece, manual operation makes it difficult to precisely control the axial clearance—too small a clearance will cause operational jamming, while too large a clearance will generate noise pollution. These defects directly affect the compressor's yield rate and product performance.

[0004] For example, the Chinese patent document "Motor Rotor of Rotary Compressor and its Machining and Assembly Method" (publication number CN103840584A) discloses a rotary compressor motor rotor composed of a large-diameter rotor segment and a small-diameter rotor segment arranged along the axial direction. The small-diameter rotor segment is coaxially stacked on the large-diameter rotor segment to form the entire motor rotor. The thickness ratio of the small-diameter rotor segment to the large-diameter rotor segment in the axial direction is 1:4, which makes the small-diameter rotor segment and the large-diameter rotor segment stacked on the lower side form a circular step. This makes the single-sided clearance distance between the outer circle of the small-diameter rotor segment and the inner circle of the stator that it mates with larger than the single-sided clearance formed by the large-diameter rotor segment. In this way, after the motor rotor is heat-fitted with the crankshaft, the influence of the crankshaft deflection in the axial direction on the upper part of the motor rotor can be effectively avoided. The reserved step meets the heat-fitting deformation requirements of the motor rotor, and the motor rotor can be directly assembled into the motor stator, eliminating the need for the existing rotor outer circle turning machining.

[0005] As can be seen from the above solutions, although the industry has attempted to develop automated assembly solutions to replace manual heat fitting processes, existing technologies still have limitations. While some automated equipment can achieve basic press-fitting functions, it lacks a closed-loop control mechanism for press-fitting gaps, causing assembly accuracy to rely on operator experience. Other solutions integrate measurement modules, but the coordination between the measurement components and the press-fitting mechanism is insufficient, making it impossible to correct press-fitting parameters in real time. Especially when processing precision components of micro-compressors, existing equipment struggles to simultaneously meet the process requirements of position correction, gap measurement, and precise press-fitting, resulting in significant fluctuations in the axial gap qualification rate. Therefore, there is an urgent need for an integrated mechanism that can automatically coordinate positioning, measurement, and press-fitting actions to fundamentally resolve the contradiction between energy consumption, safety, and assembly accuracy. Utility Model Content

[0006] To address the issues of high energy consumption, significant safety hazards, and insufficient axial clearance control precision in traditional manual heat fitting processes, this solution integrates a lifting assembly, a positioning assembly, and a top measuring assembly within the frame assembly. A lifting mechanism supports the crankcase, and the lifting assembly presses the rotor into the crankcase from bottom to top. Simultaneously, the positioning assembly lifts the lifting mechanism and crankcase together to a preset test height and fixes them in place, achieving coordinated positioning of the measurement and pressing actions. This structure eliminates the heating step, replacing manual operation with mechanical positioning and cold pressing, thus achieving a safe, energy-efficient assembly with controllable axial clearance.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: An automatic rotor cold pressing mechanism includes a frame assembly, a lifting assembly installed inside the frame assembly, a positioning assembly disposed on the side of the lifting assembly, and a measuring assembly corresponding to the lifting assembly disposed on the inner top wall of the frame assembly; wherein a lifting mechanism is disposed between the measuring assembly and the lifting assembly, the lifting assembly pressing the rotor from bottom to top into a crankcase mounted on the lifting mechanism; wherein the positioning assembly lifting the lifting mechanism together with the crankcase to a preset test height for various parameters to be measured and fixing it therein.

[0008] To address the energy consumption and safety hazards of manual heat fitting processes, this solution adopts a structural layout integrating lifting, positioning, and measurement components within a frame assembly. The lifting component acts vertically on the support mechanism, pressing the rotor into the crankcase from bottom to top, eliminating the traditional heating step. The positioning component works laterally to lift the support mechanism and crankcase together to a preset height and lock it in place, resolving manual positioning errors. The measurement component is positioned at the top corresponding to the lifting station, enabling real-time monitoring of the pressing process. The spatial positions of the three components form a rigid triangular support, with the support mechanism acting as a force transmission intermediary, ensuring that the lifting and positioning forces converge at the crankcase's center of gravity, preventing workpiece tipping. Compared to separate equipment, this integrated structure replaces manual operation with mechanical coordination, completing precision pressing in a cold state, significantly reducing energy consumption and completely eliminating the risk of burns.

[0009] Preferably, the lifting mechanism includes a tooling plate and a support column disposed on the side of the tooling plate, and the positioning component can lift the tooling plate to a preset test position; the tooling plate is provided with an annular limiting flange; the inner sidewall of the limiting flange is clearance-fitted with the outer contour of the crankcase.

[0010] Preferably, the measuring assembly includes a main test head and at least two displacement sensors; the main test head includes a top plate connected to the frame assembly and two side plates disposed on the top plate, a mounting plate is disposed at the end of the side plates away from the top plate, and a head assembly is disposed on the mounting plate, the head assembly including a crankcase test probe group disposed toward the lifting assembly.

[0011] Preferably, the crankcase test probe group includes a fan-shaped test probe and a height test probe, both of which have spherical protrusions at the bottom, and the radius of curvature of the bottom of the height test probe is greater than the chamfer radius of the crankcase positioning hole.

[0012] Preferably, the two cantilever supports are positioned below the main test head, and the displacement sensor is positioned at the top of the main test head; the cantilever supports include a pusher fixing assembly, which provides horizontal limitation for the crankcase.

[0013] Preferably, a horizontal base plate is provided in the middle of the frame assembly, and both the positioning assembly and the lifting assembly include a right-angle support slide rail assembly provided on the horizontal base plate.

[0014] Preferably, the right-angle support slide rail assembly includes a vertically arranged guide rail connecting plate; a linear guide rail assembly is provided on the inner side of the guide rail connecting plate, and a lifting plate is provided on the linear guide rail assembly.

[0015] Preferably, the lifting assembly includes two horizontal plates disposed inside the lifting plate, including a lower plate and an upper plate. A cylinder is disposed on the lower plate, and a lifting support plate is disposed through the cylinder output end through the upper plate. The top of the lifting support plate can abut against the tooling plate.

[0016] Preferably, the positioning component includes a connecting plate mounted on a horizontal base plate, the connecting plate having a through hole in the middle, and the positioning component also includes a servo electric cylinder and a lifting head disposed above the horizontal base plate through the through hole. The lifting head is driven to rise and fall by the servo electric cylinder, and a pressure sensing module is disposed inside the lifting head.

[0017] Preferably, the right-angle support slide rail assembly includes a vertically arranged guide rail connecting plate; a linear guide rail assembly is provided inside the guide rail connecting plate, and a right-angle stabilizing plate is provided on the linear guide rail assembly. The right-angle stabilizing plate includes a vertical part connected to the guide rail connecting plate and a horizontal part installed inside the lifting head. An up-and-down position detection rod is provided at the bottom of the vertical part.

[0018] Therefore, this utility model has the following beneficial effects.

[0019] The cold-pressing structure completely eliminates the heating process. The rotor-crankcase is press-fitted at room temperature through the mechanical coordination of the lifting and positioning components, directly avoiding the energy consumption and high-temperature operation risks of traditional hot-fitting processes. There is no thermal deformation interference during the assembly process.

[0020] The tooling plate's annular limiting flange and the crankcase are fitted together to form an adaptive positioning system. Combined with the height locking function of the positioning components, the workpiece maintains a vertical posture during the pressing process, solving the axial deviation problem caused by manual positioning and significantly improving the clearance qualification rate.

[0021] The dual displacement sensors of the measurement component and the crankcase test probe group form a spatial detection network. The portal frame of the main test head provides a stable reference and provides real-time feedback on the press-fit position and tilt data, replacing manual experience judgment and avoiding assembly errors with excessively large or small gaps.

[0022] The right-angle support slide rail and servo electric cylinder drive achieve micron-level motion control. The pressure sensing module and position detection rod form a double closed loop to ensure the accuracy of lifting force and positioning height, enabling cold-press assembly to achieve a stable level that cannot be achieved by hot-fitting process. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of this utility model.

[0024] Figure 2 This is a schematic diagram of the measuring component in this utility model.

[0025] Figure 3 This is a schematic diagram of the positioning component in this utility model.

[0026] Figure 4 This is a schematic diagram of the lifting component in this utility model.

[0027] In the diagram: 100. Crankcase; 1. Frame assembly; 11. Horizontal base plate; 2. Lifting assembly; 21. Lower plate; 22. Upper plate; 23. Cylinder; 24. Lifting support plate; 25. Connecting plate; 26. Through hole; 27. Servo electric cylinder; 28. Lifting head; 3. Positioning assembly; 4. Measuring assembly; 41. Main test head; 42. Displacement sensor; 43. Cantilever bracket; 44. Push knife fixing assembly; 45. Fan-shaped test probe; 46. Height test probe; 5. Lifting mechanism; 51. Tooling plate; 52. Support column; 53. Annular limiting flange; 6. Right-angle support slide rail assembly; 61. Guide rail connecting plate; 62. Linear guide rail assembly; 63. Lifting plate; 64. Right-angle stabilizing plate; 65. Vertical part; 66. Horizontal part; 7. Position detection rod. Detailed Implementation

[0028] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0029] Example 1 like Figure 1 As shown, in this embodiment, an automatic rotor cold pressing mechanism is proposed, including a frame assembly 1, a lifting assembly 2 installed inside the frame assembly, a positioning assembly 3 arranged on the side of the lifting assembly, and a measuring assembly 4 corresponding to the lifting assembly arranged on the inner wall of the top of the frame assembly; wherein, a lifting mechanism 5 is arranged between the measuring assembly and the lifting assembly, the lifting assembly can press the rotor from bottom to top into the crankcase 100 placed on the lifting mechanism; wherein, the positioning assembly can lift the lifting mechanism together with the crankcase to the preset test height of various parameters to be measured and fix it.

[0030] To address the energy consumption and safety hazards of manual heat fitting processes, this solution adopts a structural layout integrating lifting, positioning, and measurement components within a frame assembly. The lifting component acts vertically on the support mechanism, pressing the rotor into the crankcase from bottom to top, eliminating the traditional heating step. The positioning component works laterally to lift the support mechanism and crankcase together to a preset height and lock it in place, resolving manual positioning errors. The measurement component is positioned at the top corresponding to the lifting station, enabling real-time monitoring of the pressing process. The spatial positions of the three components form a rigid triangular support, with the support mechanism acting as a force transmission intermediary, ensuring that the lifting and positioning forces converge at the crankcase's center of gravity, preventing workpiece tipping. Compared to separate equipment, this integrated structure replaces manual operation with mechanical coordination, completing precision pressing in a cold state, significantly reducing energy consumption and completely eliminating the risk of burns.

[0031] like Figure 2 , 3As shown in Figure 4, the frame assembly constitutes the basic framework of the mechanism, and its internal space is clearly divided into bottom, middle, and top areas. The lifting assembly is vertically fixed in the bottom area of ​​the frame, and its output end extends upward through the working plane of the frame. This assembly uses a servo electric cylinder 27 as a power source, and the piston rod end is connected to the pressure head component. The positioning assembly is arranged on the side of the lifting assembly and is fixedly connected to the side wall of the frame through a mounting piece. Its pushing block is designed with an inclined contact surface. The measuring assembly is installed on the inner wall of the top of the frame and includes a main test pressure head 41 and two displacement sensors 42. The main test pressure head 41 is a rigid frame composed of a top plate, two side plates, and a bottom mounting plate. A crankcase test probe group is set in the center of the mounting plate. The probe group includes a fan-shaped test probe 45 and a height test probe 46, and the probe bottom adopts a spherical protrusion structure.

[0032] The lifting mechanism, serving as the core support platform, consists of a tooling plate 51 and multiple support columns 52. The tooling plate 51 is located directly above the lifting assembly, with its annular limiting flange 53 forming a clearance fit with the outer surface of the crankcase. The support columns 52 are vertically fixed to the edge of the tooling plate 51, with their bottoms contacting the push block of the positioning assembly. When the positioning assembly pushes the tooling plate 51 upwards, the support columns 52 move along a preset path on the frame, and the inner side of the flange exerts radial constraint on the crankcase. A displacement sensor 42 is mounted on top of the main test head 41.

[0033] The interconnected components form a complete mechanical transmission chain: the load-bearing structure of the frame assembly converts the lifting force into the axial load of the column; the inclined pushing surface of the positioning assembly contacts the support column 52 to generate a vertical component force; the frame structure of the measuring assembly ensures that the test probe group remains orthogonal to the lifting axis. When the lifting assembly pushes the rotor upward, the pressure head surface automatically compensates for initial assembly deviations. After the tooling plate 51 is raised to the preset height, the clearance fit of the annular flange allows the workpiece to adaptively fine-tune during the pressing process. The displacement sensor 42 synchronously detects the state of the upper surface of the crankcase, and combined with the radial measurement function of the test probe group, constitutes a spatial posture monitoring system.

[0034] The structural optimizations proposed in this embodiment are reflected in several aspects: the line contact design between the support column 52 and the positioning component significantly reduces frictional resistance; the geometric relationship between the spherical protrusion and the chamfered surface of the test needle avoids measurement interference; the width adjustment mechanism of the cantilever bracket 43 enables rapid specification switching. The rack partition layout optimizes the load transfer path; the clearance fit and rigid guide of the lifting mechanism work together to control the workpiece posture; the spatial monitoring network of the measurement component enables quantitative management of press-fit accuracy. Continuous production verification shows that the axial clearance control stability is significantly better than the traditional heat-fitting process, and the surface integrity of the workpiece is effectively guaranteed.

[0035] After the equipment is started, the operator places the crankcase on the tooling plate 51 of the lifting mechanism. The clearance fit of the annular limiting flange 53 automatically centers the workpiece. The servo cylinder 27 of the positioning component drives the jacking block to move forward, vertically lifting the tooling plate 51 to the first measurement height via the support column 52. At this time, the two displacement sensors 42 of the measuring component simultaneously detect both sides of the upper surface of the crankcase, acquiring the height data for the first time and comparing it with the previously recorded value. If the difference exceeds the set threshold, a mixed-type alarm is triggered. After confirmation, the servo cylinder 27 of the lifting component starts, pushing the rotor from bottom to top to contact the bottom of the crankcase, causing the crankcase to slightly detach from the tooling plate 51 (approximately 0.5mm floating gap). The displacement sensor 42 immediately performs a second measurement and records the current height value.

[0036] The positioning assembly then activates again, its push block further lifting the tooling plate 51 along with the crankcase until the upper surface of the crankcase is in complete contact with the test pin assembly. During this stage, the spherical protrusion of the height test pin 46 embeds into the crankcase positioning hole, the fan-shaped test pin 45 abuts against the outer edge of the workpiece, and the displacement sensor 42 collects the third height data. The control system calculates the actual assembly clearance based on the three measurements and automatically generates the final pressing stroke parameters for the lifting assembly. The lifting assembly then performs precise pressing, pressing the rotor to the target position on the crankshaft. During the pressing process, the displacement sensor 42 continuously monitors the crankcase attitude; if tilting exceeds the tolerance, the operation is immediately stopped.

[0037] After press-fitting is completed, the test probe assembly performs a final inspection of the rotor's top flatness. The positioning assembly first descends and resets, while the lifting assembly maintains pressure for 2 seconds to eliminate elastic deformation, then slowly retracts. When the operator removes the finished product, the pusher fixing assembly 44 of the cantilever bracket 43 limits and fixes the crankcase raised to the predetermined position, ensuring stability during rotor assembly and testing. Throughout the process, the line contact design between the support column 52 of the tooling plate 51 and the positioning assembly ensures smooth lifting, and the spherical contact of the test probe assembly prevents scratching the precision surface of the workpiece.

[0038] Actual production line applications demonstrate that this mechanism, through three-stage closed-loop control, completely eliminates the axial clearance loss problem inherent in manual heat-shrinking processes. When handling different compressor models, only the height parameters of the positioning components and the sensor spacing need adjustment, reducing changeover time to one-twentieth of traditional equipment. In continuous operation, the clearance fit characteristics of the lifting mechanism compensate for workpiece dimensional fluctuations, and combined with real-time feedback from the measurement system, ensure that the scrap rate is stably controlled within the process requirements.

[0039] Example 2 like Figure 1 , 3As shown, in this embodiment, based on the cold-pressing actuator of Embodiment 1, the focus is on enhancing the motion control precision and stability. A horizontal base plate 11 is added to the middle of the frame assembly. This base plate is connected to the four corner columns of the frame through high-rigidity ribs to form a double-layer bearing platform. The positioning assembly and the lifting assembly are both mounted on the horizontal base plate 11 through right-angle support slide rail assemblies 6. The slide rail assembly includes a guide rail connecting plate 61 vertically fixed on the base plate. A linear guide rail assembly 62 is assembled on the inner side of the guide rail connecting plate 61. The guide rail slider is rigidly connected to the lifting plate 63. The lifting assembly specifically includes a lower plate 21 and an upper plate 22 disposed on the inner side of the lifting plate 63. The lower plate 21 is equipped with a cylinder 23 power unit. The piston rod of the cylinder 23 passes through the guide hole in the center of the upper plate 22 and is connected to the lifting support plate 24 at the end. The top surface of the support plate is provided with a positioning boss that matches the bottom of the tooling plate 51. The positioning assembly includes a connecting plate 25 on a horizontal base plate 11. A circular through hole 26 is formed in the middle of the connecting plate. A servo electric cylinder 27 is fixed below the through hole, and its output rod passes through the through hole to connect to a lifting head 28. A pressure sensing module is embedded in the internal cavity of the lifting head 28, and the sensing surface is flush with the upper surface of the lifting head 28. A right-angle stabilizing plate 64 serves as a redundant positioning mechanism. Its vertical part 65 is fixed to a linear guide slider, and its horizontal part 66 extends into a T-shaped groove inside the lifting head 28. A position detection rod 7, fixed at the bottom of the vertical part 65, extends vertically downward, and a constant gap is maintained between the end of the detection rod and the base plate.

[0040] The spatial layout of each component forms a precision motion chain: the horizontal base plate 11 acts as a vibration isolation layer, separating external disturbances from the working area; the linear guide rail of the right-angle support slide rail constrains the lifting plate 63 to move only in the vertical direction, eliminating sway in the horizontal plane; in the double-layer plate structure of the lifting assembly, the lower plate 21 absorbs the impact of the cylinder 23, while the upper plate 22 provides a stable reference for the lifting support plate 24; the servo electric cylinder 27 of the positioning assembly directly drives the lifting head 28 through a through hole, and the pressure sensing module provides real-time feedback on the contact force of the tooling plate 51; the horizontal part 66 of the right-angle stabilizing plate 64 slides within the lifting head 28, and the position detection rod 7 of its vertical part 65 cooperates with the base plate photoelectric sensor to form a position verification mechanism independent of the servo system. When the lifting support plate 24 contacts the tooling plate 51, pressure data and position signals are uploaded synchronously. If a sudden pressure change or position deviation is detected, an emergency brake is immediately triggered.

[0041] This embodiment further optimizes the structure: First, the symmetrical layout of the four sliders in the linear guide assembly 62 enhances the anti-overturning moment of the lifting plate 63, resolving the micro-vibration caused by the guide gap in Embodiment 1; Second, the embedded installation of the pressure sensing module within the lifting head 28 avoids the force transmission chain error present in traditional external sensors; Third, the T-shaped groove of the right-angle stabilizing plate 64 allows for thermal expansion compensation of the lifting head 28 while maintaining vertical accuracy. Those skilled in the art can also use a magnetostrictive displacement sensor 42 to replace the photoelectric position detection.

[0042] This embodiment achieves precise control through rigid isolation and dual detection: the horizontal base plate 11-support slide rail system attenuates external vibrations to within the allowable range of the working area; the pressure sensing module and the position detection rod 7 form a force-position closed loop, enabling the lifting and positioning repeatability accuracy to meet the limit requirements of cold-press assembly; the right-angle stabilizing plate 64, as a mechanical stabilizing device, can maintain the stability of the device during continuous production to ensure assembly accuracy. Comparative tests show that, under the same working conditions, the axial clearance fluctuation range of this embodiment is smaller than that of Embodiment 1, with significant advantages, especially during high-cycle continuous production.

[0043] During the equipment initialization phase, the servo cylinder 27 drives the lifting head 28 of the positioning component to retract below the base plate, and the end of the position detection rod 7 of the right-angle stabilizing plate 64 triggers the origin photoelectric switch. After the operator places the crankcase on the tooling plate 51, the positioning component starts: the servo cylinder 27 pushes the lifting head 28 through the connecting plate through hole to contact the bottom of the tooling plate 51. The pressure sensing module monitors the contact force growth curve in real time. When the pressure value reaches the preset contact threshold, it automatically switches to constant pressure mode. At this time, the lifting head 28 lifts the tooling plate 51 at a constant speed with constant pressure. During this process, the horizontal part 66 of the right-angle stabilizing plate 64 slides in the T-slot inside the lifting head 28, and the gap between the position detection rod 7 of its vertical part 65 and the base plate continues to decrease, forming an independent position verification. When the detection rod triggers the first height photoelectric switch, the tooling plate 51 reaches the initial measurement position, and the displacement sensor 42 performs the first height comparison.

[0044] The lifting assembly then operates, with cylinder 23 pushing the lifting support plate 24 upwards, precisely aligning it with the bottom center of the tooling plate 51 via the positioning boss. As the rotor is lifted and contacts the crankcase, the pressure sensing module synchronously monitors load fluctuations; if an abnormal impact force is detected, the operation immediately pauses. After displacement sensor 42 completes its secondary measurement, the positioning assembly continues to lift the tooling plate 51 to the test probe group contact position. During this stage, servo cylinder 27 automatically adjusts its output based on pressure feedback to ensure a constant contact force between the crankcase and the test probe, preventing excessive pressure from the spherical protrusion into the positioning hole. The position detection rod 7 triggers the second height switch during this process to verify the consistency between the lifting stroke and the servo encoder data.

[0045] During press-fitting, the control system generates a dynamic press-fit curve by integrating three measurement data points with real-time pressure feedback. The lifting assembly's cylinder 23 applies pressure in segments according to this curve: high-speed approach in the initial stage, switching to low-speed precision press-fitting when approaching the target position. Throughout the press-fitting process, the linear guide rail of the right-angle support slide rail suppresses lateral vibration, and the double-layer horizontal plate isolates the pulsating impact of the cylinder 23, significantly reducing the fluctuation range of the data collected by the displacement sensor 42. After press-fitting is completed, the position detection rod 7 rechecks the origin accuracy during its descent, providing a benchmark calibration for the next cycle.

[0046] Verified in a real high-speed production line, this embodiment, while maintaining the three-measurement process of Embodiment 1, adds a dual protection mechanism: the pressure sensing module intercepts the risk of off-center loading caused by workpiece not being placed flat, and the position detection rod 7 corrects the cumulative positioning error. When continuously processing micro compressor crankshafts, the synergistic effect of the right-angle stabilizing plate 64 and the linear guide effectively suppresses high-frequency vibration, keeping the axial clearance pass rate stable under mass production of tens of thousands of pieces. When changing workpiece specifications, apart from adjusting the sensor spacing, only the pressure threshold and positioning height parameters need to be updated in the control system, maintaining the same maintenance efficiency as Embodiment 1 but improving the yield rate.

Claims

1. A mechanism for automatic cold pressing of a rotor, characterized in that, The device includes a frame assembly, a lifting assembly installed inside the frame assembly, a positioning assembly disposed on the side of the lifting assembly, and a measuring assembly corresponding to the lifting assembly disposed on the inner top wall of the frame assembly. A lifting mechanism is also provided between the measuring component and the lifting component. The lifting component can press the rotor into the crankcase placed on the lifting mechanism from bottom to top. The positioning component can lift the lifting mechanism together with the crankcase to the preset test height for each parameter to be tested and fix it.

2. The automatic cold press mechanism for rotor according to claim 1, characterized in that: The lifting mechanism includes a tooling plate and a support column disposed on the side of the tooling plate. The positioning component can lift the tooling plate to a preset test position. The tooling plate is provided with an annular limiting flange. The inner sidewall of the limiting flange is clearance-fitted with the outer contour of the crankcase.

3. The automatic cold press mechanism for rotors according to claim 1, characterized in that: The measuring assembly includes a main test head and at least two displacement sensors; the main test head includes a top plate connected to the frame assembly and two side plates disposed on the top plate, with a mounting plate disposed at the end of each side plate away from the top plate, and a head assembly disposed on the mounting plate, the head assembly including a crankcase test probe group disposed toward the lifting assembly.

4. The automatic cold press mechanism for rotors according to claim 3, characterized in that: The crankcase test probe group includes a fan-shaped test probe and a height test probe. The bottom of both the fan-shaped test probe and the height test probe is spherically convex, and the radius of curvature of the bottom of the height test probe is greater than the chamfer radius of the crankcase positioning hole.

5. The automatic cold press mechanism for rotors according to claim 3, characterized in that: The two cantilever supports are set below the main test head, and the displacement sensor is set on the top of the main test head; the cantilever support includes a pusher fixing assembly, which limits the horizontal movement of the crankcase.

6. The automatic cold-pressing mechanism of the rotor according to any one of claims 1-5, characterized in that: A horizontal base plate is provided in the middle of the frame assembly, and both the positioning assembly and the lifting assembly include right-angle support slide rail assemblies provided on the horizontal base plate.

7. The automatic cold press mechanism for rotors according to claim 6, characterized in that: The right-angle support slide rail assembly includes a vertically arranged guide rail connecting plate; a linear guide rail assembly is provided on the inner side of the guide rail connecting plate, and a lifting plate is provided on the linear guide rail assembly.

8. The automatic cold press mechanism for rotors according to claim 6, characterized in that: The lifting assembly includes two horizontal plates arranged inside the lifting plate, including a lower plate and an upper plate. A cylinder is provided on the lower plate, and a lifting support plate is provided through the cylinder output end through the upper plate. The top of the lifting support plate can abut against the tooling plate.

9. The automatic cold press mechanism for rotors according to claim 6, characterized in that: The positioning component includes a connecting plate mounted on a horizontal base plate, with a through hole in the middle of the connecting plate. The positioning component also includes a servo electric cylinder and a lifting head disposed above the horizontal base plate through the through hole. The lifting head is driven to move up and down by the servo electric cylinder, and a pressure sensing module is disposed inside the lifting head.

10. The automatic cold press mechanism for rotors according to claim 9, characterized in that: The right-angle support slide rail assembly includes a vertically arranged guide rail connecting plate; a linear guide rail assembly is arranged inside the guide rail connecting plate, and a right-angle stabilizing plate is arranged on the linear guide rail assembly. The right-angle stabilizing plate includes a vertical part connected to the guide rail connecting plate and a horizontal part installed inside the lifting head. An up-and-down position detection rod is arranged at the bottom of the vertical part.

Images