Automatic rotor shrinkage fit equipment and method

Abstract

The invention discloses automatic rotor shrinkage fit equipment and method. The automatic rotor shrinkage fit equipment comprises a rotor conveying line, a rotor feeding mechanism, a rotor heating mechanism, a rotor transferring mechanism, a rotor press fitting mechanism and a machine core transferring mechanism. The rotor press-fitting mechanism comprises a rotor press-fitting index plate, a machine core positioning tool, a gap adjusting tool, a gap returning mechanism, a balance block correcting mechanism, a gap reserving mechanism, a gap eliminating mechanism, a rotating shaft pressing mechanism and a cooling device. Five indexing stations are sequentially distributed on the rotor press-fitting indexing plate in the rotating direction and include the machine core body feeding and discharging station, the rotating shaft press-fitting station, the gap reserving station, the balance block correcting and press-fitting station and the cooling station. And each indexing station is provided with a machine core positioning tool and a gap adjusting tool. According to the invention, the whole-course automatic sleeving of the rotor can be realized, and a set axial gap can be kept between the bottom surface of the rotor and the machine core body and between the shaft shoulder of the rotating shaft and the plane bearing in the hot sleeving process, so that the hot sleeving quality of the whole compressor is improved.

Description

Technical Field

[0001] The invention relates to the field of special equipment for compressor manufacturing, in particular to an automatic shrink-fit device and method for rotors. Background Art

[0002] Compressors are the core components of refrigeration equipment and are widely used in various refrigeration equipment. With global warming and economic development, the demand and performance requirements for refrigeration equipment are getting higher and higher, which puts forward more stringent requirements on the production and manufacturing of compressors.

[0003] At present, in the production process of compressors, due to the high requirements of the compressor working conditions for assembly, inadequate assembly often occurs, especially in the assembly process of the rotor and the movement body during the shrink fitting process. In order to facilitate free and smooth rotation, the compressor movement needs to retain two axial clearances, namely axial clearance A and axial clearance B. Among them, axial clearance A is the axial clearance between the shaft shoulder and the plane bearing; axial clearance B is the clearance between the bottom surface of the rotor and the top surface of the movement body. In the existing shrink fitting equipment, it is easy to over-pressurize during the rotor assembly process, making the axial clearance A and axial clearance B too small, thereby affecting the free rotation of the rotor or easily getting stuck during rotation. In addition, since the movement body is a casting, the casting error is large, which makes the assembly consistency poor, and the axial clearance A and axial clearance B are difficult to control.

[0004] To avoid this problem, in the existing shrink-fit process, gaskets are usually filled in the axial gap A and axial gap B. After the press-fitting is completed, the gaskets are pulled out by external force. Since the axial gap A and axial gap B are very small, usually not exceeding 1mm, the gasket is thin, which makes it inconvenient to fill in, and more difficult to pull out, and it is easy to break, which seriously affects the quality of the compressor. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a rotor automatic shrink-fitting device and method in view of the deficiencies of the above-mentioned prior art. The rotor automatic shrink-fitting device and method can realize the fully automated shrink-fitting of the rotor, and during the shrink-fitting process, a set axial clearance can be maintained between the bottom surface of the rotor and the movement body, and between the shaft shoulder and the plane bearing. The error of the set axial clearance is small and the consistency is good, thereby improving the shrink-fitting quality of the entire compressor.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0007] A rotor automatic shrink-fitting device comprises a rotor conveying line, a rotor feeding mechanism, a rotor heating mechanism, a rotor transfer mechanism, a rotor pressing mechanism and a core transfer mechanism.

[0008] The rotor conveyor line is used for automatic transmission of rotors.

[0009] The rotor heating mechanism includes a rotor heating dividing plate and a heating device; the rotor heating dividing plate is sequentially arranged with a rotor feeding station, a rotor heating station and a heated rotor feeding station along the rotation direction; the rotor feeding station, the rotor heating station and the heated rotor feeding station are all provided with a rotor positioning tooling, which can position and place the rotor with the top surface facing downward.

[0010] The rotor feeding mechanism can grab the rotor on the rotor conveyor line and place it on the rotor positioning tool located at the rotor feeding station.

[0011] The heating device is arranged directly above the rotor heating station, and can be raised and lowered in height and extended into the inner hole of the rotor to heat the rotor to a set temperature.

[0012] The rotor pressing mechanism comprises a rotor pressing indexing plate, a movement positioning tool, a gap adjusting tool, a gap returning mechanism, a balancing block correcting mechanism, a gap retaining mechanism, a gap eliminating mechanism, a rotating shaft pressing mechanism and a cooling device.

[0013] The rotor press-fitting indexing plate is provided with five indexing stations in sequence along the direction of rotation, namely: movement body loading and unloading station, shaft press-fitting station, gap retaining station, balancing block correction and press-fitting station and cooling station.

[0014] Each indexing station is equipped with a movement positioning tool and a gap adjustment tool; among them, the movement positioning tool is set at the top of each indexing station to fix the movement body; the gap adjustment tool is set at the bottom of each indexing station and has a top block that can be raised and lowered in height; the top block can pass through the rotor press-fitted indexing plate and axially lift the rotating shaft in the movement body directly above.

[0015] The movement transfer mechanism is used for loading and unloading the movement body in the loading and unloading stations of the movement body.

[0016] The gap elimination mechanism is arranged just below the rotating shaft pressing station and can drive the height of the top block located in the rotating shaft pressing station to rise and fall.

[0017] The shaft pressing mechanism is arranged directly above the shaft pressing station, and comprises a gravity rod and a plurality of movement body pressing rods; the gravity rod is used to apply a set downward pressure to the top of the shaft located in the shaft pressing station.

[0018] A plurality of movement body pressing rods are evenly arranged on the periphery of the gravity rod and are used to press and position the movement body located in the rotating shaft pressing station.

[0019] The gap retaining mechanism is arranged directly below the gap retaining station and can drive the height of the top block located in the gap retaining station to rise and fall.

[0020] The rotor transfer mechanism can overturn, transfer and sleeve the heating rotor located at the heating rotor feeding station onto the top periphery of the rotating shaft located at the balancing block correction and press-fitting station.

[0021] The balancing weight correction mechanism includes a rotating shaft dial and a rotor pressure rod.

[0022] The rotating shaft shifting plate is arranged at one side of the balancing block correction and press-fitting station, and can shift the axial position of the rotating shaft located in the balancing block correction and press-fitting station.

[0023] The rotor pressing rod is arranged just above the balancing weight correction and pressing installation station, and can press down the rotor located in the balancing weight correction and pressing installation station.

[0024] The gap return mechanism is arranged just below the gap adjustment tooling in the cooling station, and can drive the height of the top block in the cooling station to rise and fall.

[0025] The cooling device is arranged at one side of the cooling station and can cool down the rotor located in the cooling station.

[0026] The rotor conveyor line is a chain plate line, in which there are several chain plate grooves, each of which is arranged along the transmission direction, and each chain plate groove can only accommodate one rotor perpendicular to the transmission direction; a rotor waiting station is provided at the tail end of each chain plate groove, which is used for the rotor feeding mechanism to position and grab the rotor on the rotor conveyor line; the rotor waiting station is provided with a dividing mechanism, which is used to ensure that the rotor waiting station has only one rotor to be grabbed.

[0027] The material distribution mechanism includes a baffle, a baffle rod, a chain plate end proximity switch and a baffle proximity switch.

[0028] The baffle is arranged upstream of the rotor waiting station, the height of which can be raised and lowered, and can extend into the corresponding chain plate groove to block the upstream rotor.

[0029] The gear rods are arranged on both sides of the upstream of the baffle, and the vertical distance between the gear rods and the baffle is not greater than the rotor diameter, and the height of each gear rod can be raised and lowered.

[0030] The chain plate end proximity switch is arranged on the end side wall of the corresponding chain plate slot, and the baffle plate proximity switch is arranged on the upstream side wall of the baffle plate.

[0031] The heating device is a heating coil, the length of which is greater than the depth of the rotating shaft mounting hole in the rotor; a heating hole into which the heating coil can be inserted is arranged at the center of the rotor positioning tooling.

[0032] The rotor heating stations have an even number and are arranged adjacent to each other in the circumferential direction. The heating coils above two adjacent rotor heating stations can be raised and lowered synchronously.

[0033] The rotor heating mechanism also includes a temperature detection device arranged between the heating rotor feeding station and the heating rotor feeding station; a defective product box is arranged outside the heating rotor feeding station.

[0034] The clearance adjustment tool also includes a screw assembly and a gear; the gear is horizontally installed at the bottom of the rotor press-fitted dividing plate, and the height position is fixed, and the gear is provided with at least two gear positioning holes along the circumference; the screw assembly is arranged at the top center of the gear, and the top of the screw assembly is threadedly connected to the top block.

[0035] The gap retaining mechanism includes a rack, a rack transverse driving assembly and a rack longitudinal driving assembly.

[0036] The rack and the gear are arranged at the same height, and the rack can slide toward the gear and mesh with the gear under the drive of the longitudinal drive component.

[0037] When the rack is meshed with the gear, the rack can drive the gear to rotate under the drive of the rack transverse drive assembly, thereby realizing the height lifting of the top block.

[0038] The clearance elimination mechanism includes a clearance elimination rotating pin, a clearance elimination motor and a torque limiter; the clearance elimination rotating pin can cooperate with the gear positioning hole; the clearance elimination motor can drive all the clearance elimination rotating pins to rotate synchronously; and the torque limiter can limit the output torque of the clearance elimination motor.

[0039] A rotor automatic shrink-fit method comprises the following steps.

[0040] Step 1: Rotor waiting: The rotor conveyor line automatically transfers the rotor with the top surface facing downward to the rotor waiting station.

[0041] Step 2, rotor loading: The rotor loading mechanism grabs the rotor on the rotor conveyor line and places it on the rotor positioning tooling located on the rotor loading station; here, the rotor still keeps the top surface facing downward.

[0042] Step 3: Heating the rotor: Use a heating device to heat the rotor to a set temperature.

[0043] Step 4: Press-fitting the shaft, specifically including the following steps:

[0044] Step 4-1, movement body pressing: the gravity rod in the shaft pressing mechanism and all movement body pressing rods are synchronously lowered, and the gravity rod is sleeved on the outer periphery of the top of the shaft located in the shaft pressing station; the gravity rod and all movement body pressing rods continue to synchronously lower, and all movement body pressing rods are pressed on the top surface of the movement body located in the shaft pressing station; at this time, the top of the gravity rod is detached from the shaft pressing mechanism and is in a free state.

[0045] Step 4-2, pressing down the rotating shaft: Under the gravity of the gravity rod, the height of the rotating shaft is lowered, so that the bottom end of the rotating shaft is connected and pressed into contact with the top block of the gap adjustment tooling located in the rotating shaft pressing station.

[0046] Step 4-3, clearance elimination: the movement body has a plane bearing sleeved on the outer circumference of the rotating shaft, the rotating shaft directly below the plane bearing has a shaft shoulder, and there is an axial clearance A between the plane bearing and the shaft shoulder; the clearance elimination mechanism drives the top block to rise in height, so that the axial clearance A gradually decreases; the clearance elimination mechanism drives the top block to continue to rise in height until the shaft shoulder is pressed and contacted with the bottom surface of the plane bearing; at this time, the axial clearance A is completely discharged and becomes zero.

[0047] Step 5, gap retention: After the gap is eliminated, the movement body moves to the gap retention station, and the gap retention mechanism lowers the height of the top block located in the gap retention station to the set height, and the axial gap A between the plane bearing and the shoulder will gradually increase; the gap retention mechanism controls the descending stroke of the top block, and then controls the axial gap A to be maintained at the set reserved value.

[0048] Step 6: Balancing block calibration and press-fitting, specifically including the following steps:

[0049] Step 6-1, shaft alignment: after the clearance is retained, the rotor moves to the balancing block correction and press-fitting station; the shaft shift plate moves horizontally and is inserted into the outer periphery of the bottom of the shaft in the balancing block correction and press-fitting station; the shaft shift plate continues to move horizontally to the set position, thereby aligning the axial position of the shaft.

[0050] Step 6-2, heating the rotor for loading: using the rotor transfer mechanism, the heated rotor is turned over, transferred and sleeved on the outer periphery of the top of the shaft after the shaft is aligned.

[0051] Step 6-3, press down the rotor: while keeping the shaft aligned, the height of the rotor pressure rod is lowered to press down the loaded heated rotor; during the rotor pressing process, an axial limit sleeve is provided in the movement body and is sleeved on the outer circumference of the shaft to achieve the rotor press-fit limit. After the rotor is pressed, the bottom surface of the rotor and the top surface of the movement body have a set axial gap B.

[0052] Step 7, rotor cooling: Move the movement body after balancing block correction and press-fitting to the cooling station, and the cooling device cools the rotor; when the rotor is cooled to the set temperature, the gap return mechanism lowers the top block in the cooling station to the initial set height and enters the next cycle.

[0053] The present invention has the following beneficial effects:

[0054] 1. The rotor conveyor line, rotor feeding mechanism, rotor heating mechanism, rotor transfer mechanism, rotor pressing mechanism and movement transfer mechanism in the present invention cooperate with each other to realize the fully automated assembly of the rotor, thus saving labor costs, avoiding the occurrence of personal injury incidents such as scalding, and improving the quality consistency of the rotor shrink-fit assembly.

[0055] 2. The arrangement of the gap adjustment tooling, gap return mechanism, balancing block correction mechanism, gap retaining mechanism, gap elimination mechanism and shaft pressing mechanism in the rotor pressing mechanism of the present invention can select the bottom surface of the plane bearing as the reference surface during the shrink fitting process, and can accurately control the axial gap A and the axial gap B. Therefore, the error of the two axial gaps is small and the consistency is good, thereby improving the shrink fitting quality of the entire compressor. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] Figure 1 A schematic structural diagram of an automatic rotor shrink-fit device according to the present invention is shown.

[0057] Figure 2 A schematic diagram of the rotor conveyor line is shown.

[0058] Figure 3 The structural schematic diagram of the rotor feeding mechanism is shown.

[0059] Figure 4 A schematic diagram of the rotor heating mechanism is shown.

[0060] Figure 5 The schematic diagram of the structure of the rotor positioning tooling is shown; wherein, (a) is a three-dimensional diagram of the rotor positioning tooling after being inverted; and (b) is a three-dimensional cross-sectional diagram of the rotor positioning tooling.

[0061] Figure 6 A schematic diagram of the structure of the rotor press-fitting mechanism is shown.

[0062] Figure 7 The schematic diagram of the structure of the rotor transfer mechanism is shown.

[0063] Figure 8 A schematic diagram of the structure of the gap adjustment tooling is shown.

[0064] Fig. 9 A schematic diagram of the structure of the rotary transfer mechanism is shown.

[0065] Fig.10 A structural schematic diagram of the gap elimination mechanism is shown.

[0066] Fig.11 A schematic diagram of the structure of the gap retaining mechanism is shown.

[0067] Fig.12 A structural schematic diagram of the balancing weight correction mechanism is shown.

[0068] Fig.13 A structural schematic diagram of the gap return mechanism is shown.

[0069] Fig.14 A 3D simulated cross-section of the movement is shown.

[0070] Among them are:

[0071] 1. Rotor conveyor line; 11. Chain plate slot; 12. Chain plate line; 13. Chain plate end proximity switch; 14. Baffle; 15. Baffle cylinder; 16. Shift rod cylinder; 17. Shift rod; 18. Baffle proximity switch;

[0072] 2. Rotor feeding mechanism; 21. Rotor feeding clamp;

[0073] 3. Rotor heating mechanism; 31. Rotor tooling; 32. Heating drive device; 33. Heating device; 34. Temperature detection device; 35. Defective product box; 36. Visual inspection;

[0074] 4. Rotor transfer mechanism; 41. Rotor transfer clamp;

[0075] 5. Rotor press-fitting mechanism;

[0076] 51. Movement positioning tooling;

[0077] 52. Gap adjustment tool; 521. Gear; 521a. Gear positioning hole; 522. Screw assembly; 523. Top block;

[0078] 53. Gap return mechanism; 531. Gap return cylinder; 532. Gap return motor; 533. Gap return rotating pin;

[0079] 54. Balancing weight correction mechanism; 541. Balancing weight correction cylinder; 542. Straight dial plate;

[0080] 55. Gap retention mechanism;

[0081] 551. rack transverse drive assembly; 552. rack longitudinal drive assembly; 553. rack;

[0082] 56. Gap elimination mechanism;

[0083] 561. Clearance elimination cylinder; 562. Clearance elimination motor; 563. Torque limiter; 564. Clearance elimination transfer pin;

[0084] 57. Movement body pressing rod; 58. Gravity rod; 59. Rotating shaft pressing cylinder;

[0085] 510. Rotor pressure rod cylinder; 511. Rotor pressure rod;

[0086] 6. Rotary transfer mechanism; 61. Rotary transfer lifting cylinder; 62. Rotary transfer motor; 63. Shrink sleeve movement; 64. Movement transfer clamp; 65. Movement transfer clamp cylinder; 66. Line body;

[0087] 7. Movement; 71. Movement body; 711. Axial limit sleeve; 72. Rotating shaft; 721. Shaft shoulder; 73. Rotor; 74. Crankshaft counterweight; 75. Plane bearing; 76. Axial clearance A; 77. Axial clearance B. DETAILED DESCRIPTION

[0088] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific preferred embodiments.

[0089] In the description of the present invention, it should be understood that the terms "left side", "right side", "upper part", "lower part" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. "First", "second" and the like do not indicate the importance of the components, and therefore cannot be understood as limiting the present invention. The specific dimensions used in this embodiment are only for illustrating the technical solution, and do not limit the scope of protection of the present invention.

[0090] like Fig.14 As shown, the compressor movement 7 includes a movement body 71, a rotating shaft 72, a rotor 73, a crankshaft counterweight 74 and a plane bearing 75. The crankshaft counterweight is arranged at the bottom of the rotating shaft, and the bottom surface of the crankshaft counterweight is a flat surface; a shaft shoulder 721 is arranged on the rotating shaft below the plane bearing, and an axial gap A 76 is provided between the shaft shoulder and the plane bearing. An axial limit sleeve 711 that can extend into the rotor hole is preferably integrally arranged at the top center of the movement body 71, and the axial gap B 77 between the bottom surface of the rotor and the top surface of the movement body can be controlled by controlling the axial height of the axial limit sleeve.

[0091] like Figure 1 As shown, a rotor automatic shrink-fitting device includes a rotor conveyor line 1, a rotor feeding mechanism 2, a rotor heating mechanism 3, a rotor transfer mechanism 4, a rotor pressing mechanism 5 and a movement transfer mechanism 6.

[0092] The rotor conveyor line is used for automatic transmission of rotors.

[0093] like Figure 2As shown, the rotor conveying line is a chain plate line 12, and there are several chain plate grooves 11 in the chain plate line. Each chain plate groove is arranged along the transmission direction, and each chain plate groove can only accommodate one rotor perpendicular to the transmission direction; a rotor waiting station is provided at the tail end of each chain plate groove, which is used for the rotor feeding mechanism to position and grab the rotor on the rotor conveying line; the rotor waiting station is provided with a dividing mechanism, which is used to ensure that the rotor waiting station has only one rotor to be grabbed.

[0094] The material distribution mechanism includes a baffle 14 , a baffle rod 17 , a chain plate end proximity switch 13 and a baffle proximity switch 18 .

[0095] The baffle is arranged upstream of the rotor waiting station, and its height can be raised or lowered under the drive of a baffle lifting device (preferably a baffle cylinder 15), and can extend into the corresponding chain plate groove to block the upstream rotor.

[0096] The gear rods are arranged on both sides of the upstream of the baffle, and the vertical distance between the gear rods and the baffle is not greater than the rotor diameter. The height of each gear rod can be raised or lowered under the drive of the gear rod lifting device (preferably the gear rod cylinder 16).

[0097] The chain plate end proximity switch is arranged on the end side wall of the corresponding chain plate slot, and the baffle plate proximity switch is arranged on the upstream side wall of the baffle plate.

[0098] Through the feedback signals of the chain plate end proximity switch and the baffle plate proximity switch, the baffle plate and the lever are alternately raised and lowered, so that the rotor waiting station has only one rotor to be grasped. That is, when the chain plate end proximity switch detects whether there is a rotor workpiece, the baffle plate cylinder 15 retracts and lifts the baffle plate 14. When it is detected that there is a rotor on the current chain plate, the baffle plate cylinder 15 extends and lowers the baffle plate 14, so as to control that there is only one rotor 11 to be grasped at the end of each chain plate on the chain plate line 12.

[0099] When the baffle plate proximity switch 18 detects, the gear lever cylinder 16 extends and lowers the gear lever 17. When the baffle plate proximity switch 18 does not detect the rotor, the gear lever cylinder 16 retracts and raises the gear lever 17.

[0100] The rotor feeding mechanism is used to grab the rotor at the rotor waiting station on the rotor conveyor line and place it on the rotor positioning tooling located at the subsequent rotor feeding station.

[0101] like Figure 3 As shown, the rotor feeding mechanism is a rotary manipulator, at the end of which is mounted a rotor feeding jaw 21 , the rotor feeding jaw 21 comprising at least two openable and closable finger joints, and the rotor feeding jaw can grasp the outer wall surface of the rotor.

[0102] like Figure 1 and Figure 4As shown, the rotor heating mechanism includes a rotor heating dividing plate, a heating drive device 32, a heating device 33, a temperature detection device 34, a defective product box 35 and a visual detection mechanism 36; the rotor heating dividing plate is sequentially arranged with a rotor feeding station, a rotor heating station and a heated rotor feeding station along the rotation direction.

[0103] The rotor feeding station, the rotor heating station and the heated rotor feeding station are all provided with a rotor positioning fixture 31, which can position and place the rotor with the top surface facing downward.

[0104] The above-mentioned visual inspection mechanism is preferably arranged between the rotor feeding station and the rotor heating station, and performs appearance model inspection and rotor angle inspection on the rotor grasped by the rotor feeding mechanism, so as to prevent accidental grasping while making the rotor hole face the crankshaft; unqualified rotors detected by the visual inspection mechanism are placed in the unqualified product box 35 outside the heating rotor feeding station.

[0105] The above-mentioned heating device is arranged directly above the rotor heating station, and is preferably a heating coil. Under the drive of a heating drive device (preferably a heating cylinder), the height of the heating coil can be raised and lowered and extended into the inner hole of the rotor to heat the rotor to a set temperature.

[0106] like Figure 5 As shown, a rotor positioning pin 311 is provided on the top of the rotor positioning tool, and the rotor is positioned by cooperating with the rotor process hole on the top surface of the rotor.

[0107] A heating hole 313 is provided in the middle of the rotor positioning tool. In this embodiment, the length of the heating coil is greater than the depth of the shaft mounting hole in the rotor, and can extend into the heating hole of the rotor positioning tool to achieve rapid heating of the rotor.

[0108] In this embodiment, there are an even number of rotor heating stations (preferably four), which are arranged adjacent to each other in the circumferential direction, and the heating coils above two adjacent rotor heating stations can be raised and lowered synchronously.

[0109] The four rotor heating stations can be heated separately in parallel, which can improve heating efficiency.

[0110] The first two rotor heating stations can also form a first heating station, and the last two rotor heating stations can form a second heating station. The first heating station can first be quickly heated to a temperature close to the set temperature, and the second heating station can then accurately heat to the set temperature.

[0111] The temperature detection device is arranged between the heating rotor feeding station and the heating rotor feeding station, and the rotor with unqualified temperature enters the next heating cycle.

[0112] The rotor transfer mechanism can overturn, transfer and sleeve the heating rotor located at the heating rotor feeding station onto the top periphery of the rotating shaft located at the balancing block correction and press-fitting station.

[0113] like Figure 7 As shown, the rotor transfer mechanism is a rotating robot having a rotor transfer clamp, including a rotating disk and a left clamp and a right clamp arranged on the rotating disk; the left clamp and the right clamp can be opened and closed to achieve lateral grasping of the rotor side wall; the rotating disk can drive the left clamp and the right clamp to rotate, thereby achieving flipping of the rotor.

[0114] like Figure 6 As shown, the rotor pressing mechanism includes a rotor pressing indexing plate, a movement positioning tool 51, a gap adjustment tool 52, a gap return mechanism 53, a balancing block correction mechanism 54, a gap retaining mechanism 55, a gap elimination mechanism 56, a shaft pressing mechanism and a cooling device.

[0115] The rotor press-fitting indexing plate is provided with five indexing stations in sequence along the direction of rotation, namely: movement body loading and unloading station, shaft press-fitting station, gap retaining station, balancing block correction and press-fitting station and cooling station.

[0116] Each indexing station is equipped with a movement positioning tool and a gap adjustment tool.

[0117] The above-mentioned movement positioning tooling is arranged at the top of each indexing station and is used to fix the movement body. It is a prior art and will not be described in detail here.

[0118] The above-mentioned gap adjustment tool is arranged at the bottom of each indexing station, such as Figure 8 As shown, the gap adjustment tooling includes a gear 521, a screw assembly 522 and a top block 523; wherein the gear is horizontally installed at the bottom of the rotor press-fitted dividing plate, and the height position is fixed, and the gear is provided with at least two gear positioning holes 521a along the circumferential direction; the screw assembly is arranged at the top center of the gear, and the top of the screw assembly is threadedly connected to the top block.

[0119] The lift block can be driven by external force to achieve height lifting and lowering, and can pass through the rotor press-fitted dividing plate to axially lift the rotating shaft in the movement body directly above.

[0120] The movement transfer mechanism is used for loading and unloading the movement body in the loading and unloading stations of the movement body.

[0121] like Fig. 9 As shown, the movement transfer mechanism includes a rotary transfer lifting cylinder 61, a rotary transfer motor 62, a shrink-fit movement 63, a movement transfer clamp 64, a movement transfer clamp cylinder 65 and a wire body 66.

[0122] The above-mentioned line body includes an empty core loading position and a shrink-fit core unloading position, which are respectively used for the automatic conveying and supply of the empty core that has not been shrink-fitted and the automatic transmission of the shrink-fitted core 63 to the next station.

[0123] In this embodiment, the core transfer mechanism has two core transfer clamps, which are driven by a rotary transfer motor to realize left-right rotation and exchange grasping.

[0124] Each movement transfer clamp can be raised or lowered in height under the drive of the corresponding rotary transfer lifting cylinder, and can also be opened or closed left or right under the drive of the movement transfer clamp cylinder.

[0125] The clearance elimination mechanism is arranged directly below the rotating shaft pressing station and can drive the height of the top block located in the rotating shaft pressing station to rise and fall.

[0126] like Fig.10 As shown, the clearance elimination mechanism includes a clearance elimination cylinder 561, a clearance elimination motor 562, a torque limiter 563 and a clearance elimination rotating pin 564. The clearance elimination rotating pin can cooperate with the gear positioning hole; the clearance elimination motor can drive all the clearance elimination rotating pins to rotate synchronously; the clearance elimination cylinder can drive all the clearance elimination rotating pins to rise and fall synchronously. The torque limiter can limit the output torque of the clearance elimination motor, thereby ensuring that the axial clearance A is completely discharged.

[0127] The shaft pressing mechanism is arranged just above the shaft pressing station. Figure 6 As shown, it includes a gravity rod 58, a plurality of movement body pressing rods 57 and a rotating shaft pressing cylinder 58.

[0128] The gravity rod can apply a set downward pressure to the top of the spindle located in the spindle press station.

[0129] A plurality of movement body pressing rods are evenly arranged on the periphery of the gravity rod and are used to press and position the movement body located in the rotating shaft pressing station.

[0130] The above-mentioned rotating shaft pressing cylinder can drive the gravity rod 58 and a plurality of movement body pressing rods 57 to rise and fall synchronously, wherein the gravity rod is movably connected to the rotating shaft pressing mechanism, that is, the gravity rod is placed on the lifting plate below the rotating shaft pressing cylinder.

[0131] The gap retaining mechanism is arranged directly below the gap retaining station and can drive the height of the top block located in the gap retaining station to rise and fall.

[0132] like Fig.11 As shown, the gap retaining mechanism includes a rack transverse driving assembly 551 , a rack longitudinal driving assembly 552 and a rack 553 .

[0133] The rack and the gear are arranged at the same height, and the rack can slide toward the gear and mesh with the gear under the drive of a longitudinal drive component (preferably a cylinder).

[0134] When the rack is meshed with the gear, the rack can drive the gear to rotate under the drive of the rack transverse driving component (preferably a cylinder), thereby realizing the height lifting of the top block.

[0135] like Figure 6 and Fig.12 As shown, the balancing weight correction mechanism includes a rotating shaft dial plate 542 and a rotor pressure rod 511.

[0136] The shaft shifting plate is arranged on one side of the balancing block correction and pressing station. Under the drive of the balancing block correction cylinder 541, it can push the shaft located in the balancing block correction and pressing station horizontally forward to calibrate the position of the crankshaft counterweight (also called balancing block).

[0137] The rotor pressure rod is arranged just above the balancing block correction and press-fitting station, and can press down the rotor located in the balancing block correction and press-fitting station under the drive of the rotor pressure rod cylinder 510.

[0138] The gap return mechanism is arranged just below the gap adjustment tooling in the cooling station, and can drive the height of the top block in the cooling station to rise and fall.

[0139] like Fig.12 As shown, the gap return mechanism includes a gap return cylinder 531, a gap return motor 532 and a gap return rotating pin 533. The gap return cylinder 531 can drive the gap return rotating pin to rise and fall, and the gap return motor can drive the gap return rotating pin to rotate, thereby driving the gear to rotate, and driving the top block to rise and fall through the screw pair.

[0140] The cooling device is arranged at one side of the cooling station, and can cool down the rotor in the cooling station. In this embodiment, the cooling device is preferably a plurality of screw-shaped cold air nozzles arranged at one side of the cooling station, and can realize spray cooling of the rotor.

[0141] A rotor automatic shrink-fit method comprises the following steps.

[0142] Step 1: Rotor waiting: The rotor conveyor line automatically transfers the rotor with the top surface facing downward to the rotor waiting station.

[0143] Step 2, rotor loading: The rotor loading mechanism grabs the rotor on the rotor conveyor line and places it on the rotor positioning tooling located on the rotor loading station; here, the rotor still keeps the top surface facing downward.

[0144] Step 3: Heating the rotor: Use a heating device to heat the rotor to a set temperature.

[0145] Step 4: Press-fitting the shaft, specifically including the following steps:

[0146] Step 4-1, movement body pressing: the gravity rod in the shaft pressing mechanism and all movement body pressing rods are synchronously lowered, and the gravity rod is sleeved on the outer periphery of the top of the shaft located in the shaft pressing station; the gravity rod and all movement body pressing rods continue to synchronously lower, and all movement body pressing rods are pressed on the top surface of the movement body located in the shaft pressing station; at this time, the top of the gravity rod is detached from the shaft pressing mechanism and is in a free state.

[0147] Step 4-2, pressing down the rotating shaft: under the gravity of the gravity rod, the height of the rotating shaft is lowered, so that the bottom end of the rotating shaft is connected and pressed into contact with the top block of the gap adjustment tooling located in the rotating shaft pressing station.

[0148] Step 4-3, clearance elimination: the movement body has a plane bearing sleeved on the outer circumference of the rotating shaft, the rotating shaft directly below the plane bearing has a shaft shoulder, and there is an axial clearance A between the plane bearing and the shaft shoulder; the clearance elimination mechanism drives the top block to rise in height, so that the axial clearance A gradually decreases; the clearance elimination mechanism drives the top block to continue to rise in height until the shaft shoulder is pressed and contacted with the bottom surface of the plane bearing; at this time, the axial clearance A is completely discharged and becomes zero.

[0149] Step 5, gap retention: After the gap is eliminated, the movement body moves to the gap retention station, and the gap retention mechanism lowers the height of the top block located in the gap retention station to the set height, and the axial gap A between the plane bearing and the shoulder will gradually increase; the gap retention mechanism controls the descending stroke of the top block, and then controls the axial gap A to be maintained at the set reserved value.

[0150] Step 6: Balancing block calibration and press-fitting, specifically including the following steps:

[0151] Step 6-1, shaft alignment: after the clearance is retained, the rotor moves to the balancing block correction and press-fitting station; the shaft shift plate moves horizontally and is inserted into the outer periphery of the bottom of the shaft in the balancing block correction and press-fitting station; the shaft shift plate continues to move horizontally to the set position, thereby aligning the axial position of the shaft.

[0152] Step 6-2, heating the rotor for loading: using the rotor transfer mechanism, the heated rotor is turned over, transferred and sleeved on the outer periphery of the top of the shaft after the shaft is aligned.

[0153] Step 6-3, press down the rotor: while keeping the shaft aligned, the height of the rotor pressure rod is lowered to press down the loaded heated rotor; during the rotor pressing process, an axial limit sleeve is provided in the movement body and is sleeved on the outer circumference of the shaft to achieve the rotor press-fit limit. After the rotor is pressed, the bottom surface of the rotor and the top surface of the movement body have a set axial gap B.

[0154] Step 7, rotor cooling: Move the movement body after balancing block correction and press-fitting to the cooling station, and the cooling device cools the rotor; when the rotor is cooled to the set temperature, the gap return mechanism lowers the top block in the cooling station to the initial set height and enters the next cycle.

[0155] The preferred embodiments of the present invention are described in detail above; however, the present invention is not limited to the specific details in the above embodiments. Within the technical concept of the present invention, various equivalent transformations can be made to the technical solutions of the present invention, and these equivalent transformations all belong to the protection scope of the present invention.

Claims

1. A rotor automatic shrink-fit device, characterized in that: It includes a rotor conveying line, a rotor feeding mechanism, a rotor heating mechanism, a rotor transfer mechanism, a rotor pressing mechanism and a movement transfer mechanism; The rotor conveyor line is used for automatic transmission of rotors; The rotor heating mechanism comprises a rotor heating indexing plate and a heating device; the rotor heating indexing plate is provided with a rotor feeding station, a rotor heating station and a heated rotor feeding station in sequence along the rotation direction; the rotor feeding station, the rotor heating station and the heated rotor feeding station are all provided with a rotor positioning tool, which can position and place the rotor with the top surface facing downward; The rotor feeding mechanism can grab the rotor on the rotor conveyor line and place it on the rotor positioning fixture located at the rotor feeding station; the heating device is arranged directly above the rotor heating station, and its height can be raised and lowered and extended into the inner hole of the rotor to heat the rotor to the set temperature; The rotor pressing mechanism includes a rotor pressing indexing plate, a movement positioning tool, a gap adjustment tool, a gap return mechanism, a balancing block correction mechanism, a gap retaining mechanism, a gap eliminating mechanism, a shaft pressing mechanism and a cooling device; The rotor press-fit indexing plate is equipped with five indexing stations in sequence along the direction of rotation, namely: the loading and unloading station of the movement body, the rotating shaft press-fitting station, the gap reservation station, the balancing block correction and press-fitting station and the cooling station; Each indexing station is equipped with a movement positioning tool and a gap adjustment tool; wherein, the movement positioning tool is arranged at the top of each indexing station, and is used to fix the movement body; the gap adjustment tool is arranged at the bottom of each indexing station, and has a lifting block that can be raised and lowered in height; the lifting block can pass through the rotor press-fit indexing plate, and axially lift the rotating shaft in the movement body directly above; The movement transfer mechanism is used for loading and unloading the movement body in the loading and unloading station of the movement body; The clearance elimination mechanism is arranged directly below the rotating shaft press-fitting station, and can drive the height of the top block in the rotating shaft press-fitting station to rise and fall; the rotating shaft pressing mechanism is arranged directly above the rotating shaft press-fitting station, and includes a gravity rod and a plurality of movement body pressing rods; the gravity rod is used to apply a set downward pressure to the top of the rotating shaft in the rotating shaft press-fitting station; A plurality of movement body pressing rods are evenly arranged on the periphery of the gravity rod, and are used to press and position the movement body located in the rotating shaft pressing station; The gap retaining mechanism is arranged directly below the gap retaining station, and can drive the height of the top block in the gap retaining station to rise and fall; the rotor transfer mechanism can flip, transfer and sleeve the heating rotor located at the heating rotor feeding station onto the top periphery of the rotating shaft located at the balancing block correction and press-fitting station; The balancing weight correction mechanism includes a rotating shaft dial plate and a rotor pressure rod; The rotating shaft shifting plate is arranged at one side of the balancing block correction and press-fitting station, and can shift the axial position of the rotating shaft located in the balancing block correction and press-fitting station; The rotor pressing rod is arranged just above the balancing block correction and press-fitting station, and can press down the rotor located in the balancing block correction and press-fitting station; The gap return mechanism is arranged just below the gap adjustment tooling in the cooling station, and can drive the height of the top block in the cooling station to rise and fall; The cooling device is arranged at one side of the cooling station and can cool down the rotor located in the cooling station.

2. The rotor automatic shrink-fitting equipment according to claim 1 is characterized in that: The rotor conveyor line is a chain plate line, in which there are several chain plate grooves, each of which is arranged along the transmission direction, and each chain plate groove can only accommodate one rotor perpendicular to the transmission direction; a rotor waiting station is provided at the tail end of each chain plate groove, which is used for the rotor feeding mechanism to position and grab the rotor on the rotor conveyor line; the rotor waiting station is provided with a dividing mechanism, which is used to ensure that the rotor waiting station has only one rotor to be grabbed.

3. The rotor automatic shrink-fitting equipment according to claim 2 is characterized in that: The material distribution mechanism includes a baffle, a baffle rod, a chain plate end proximity switch and a baffle proximity switch; The baffle is set upstream of the rotor waiting station, and its height can be raised or lowered, and can be inserted into the corresponding chain plate slot to block the upstream rotor; the stopper rods are set on both sides of the upstream of the baffle, and the vertical distance between the stopper rod and the baffle is not greater than the rotor diameter, and the height of each stopper rod can be raised or lowered; The chain plate end proximity switch is arranged on the end side wall of the corresponding chain plate slot, and the baffle plate proximity switch is arranged on the upstream side wall of the baffle plate.

4. The rotor automatic shrink-fitting equipment according to claim 1 is characterized in that: The heating device is a heating coil, the length of which is greater than the depth of the rotating shaft mounting hole in the rotor; a heating hole into which the heating coil can be inserted is arranged at the center of the rotor positioning tooling.

5. The rotor automatic shrink-fitting equipment according to claim 4 is characterized in that: The rotor heating stations have an even number and are arranged adjacent to each other in the circumferential direction. The heating coils above two adjacent rotor heating stations can be raised and lowered synchronously.

6. The rotor automatic shrink-fitting equipment according to claim 1, characterized in that: The rotor heating mechanism also includes a temperature detection device arranged between the heating rotor feeding station and the heating rotor feeding station; a defective product box is arranged outside the heating rotor feeding station.

7. The rotor automatic shrink-fitting equipment according to claim 1 is characterized in that: The clearance adjustment tool also includes a screw assembly and a gear; the gear is horizontally installed at the bottom of the rotor press-fitted dividing plate, and the height position is fixed, and the gear is provided with at least two gear positioning holes along the circumference; the screw assembly is arranged at the top center of the gear, and the top of the screw assembly is threadedly connected to the top block.

8. The rotor automatic shrink-fitting equipment according to claim 7, characterized in that: The gap retaining mechanism includes a rack, a rack transverse drive assembly and a rack longitudinal drive assembly; The rack and the gear are arranged at the same height. The rack can slide toward the gear and mesh with the gear under the drive of the longitudinal drive component. When the rack is meshed with the gear, the rack can drive the gear to rotate under the drive of the rack transverse drive component, thereby realizing the height lifting of the top block.

9. The rotor automatic shrink-fitting equipment according to claim 7, characterized in that: The clearance elimination mechanism includes a clearance elimination rotating pin, a clearance elimination motor and a torque limiter; the clearance elimination rotating pin can cooperate with the gear positioning hole; the clearance elimination motor can drive all the clearance elimination rotating pins to rotate synchronously; and the torque limiter can limit the output torque of the clearance elimination motor.

10. A rotor automatic shrink-fit method, characterized in that: The steps include: Step 1, rotor waiting: the rotor conveyor line automatically transfers the rotor with the top surface facing downward to the rotor waiting station; Step 2, rotor loading: The rotor loading mechanism grabs the rotor on the rotor conveyor line and places it on the rotor positioning tooling located on the rotor loading station; here, the rotor still keeps the top surface facing downward; Step 3, rotor heating: using a heating device to heat the rotor to a set temperature; Step 4: Press-fitting the shaft, specifically including the following steps: Step 4-1, movement body pressing: the gravity rod in the shaft pressing mechanism and all movement body pressing rods are synchronously lowered, and the gravity rod is sleeved on the outer periphery of the top of the shaft located in the shaft pressing station; the gravity rod and all movement body pressing rods continue to be synchronously lowered, and all movement body pressing rods are pressed on the top surface of the movement body located in the shaft pressing station; at this time, the top of the gravity rod is separated from the shaft pressing mechanism and is in a free state; Step 4-2, pressing down the rotating shaft: the rotating shaft is lowered under the gravity of the gravity rod, so that the bottom end of the rotating shaft is connected and pressed into contact with the top block of the gap adjustment tooling located in the rotating shaft pressing station; Step 4-3, clearance elimination: the movement body has a plane bearing sleeved on the outer circumference of the rotating shaft, the rotating shaft located directly below the plane bearing has a shaft shoulder, and there is an axial clearance A between the plane bearing and the shaft shoulder; the clearance elimination mechanism drives the top block to rise in height, so that the axial clearance A gradually decreases; the clearance elimination mechanism drives the top block to continue to rise in height until the shaft shoulder is pressed and contacted with the bottom surface of the plane bearing; at this time, the axial clearance A is completely eliminated and becomes zero; Step 5, gap retention: after the gap is eliminated, the movement body moves to the gap retention station, and the gap retention mechanism lowers the height of the top block located in the gap retention station to a set height, and the axial gap A between the plane bearing and the shaft shoulder will gradually increase; the gap retention mechanism controls the descending stroke of the top block, thereby controlling the axial gap A to be maintained at the set reserved value; Step 6: Balancing block calibration and press-fitting, specifically including the following steps: Step 6-1, shaft alignment: the rotor with the gap retained is moved to the balancing block correction and press-fitting station; the shaft plate is moved horizontally and inserted into the outer periphery of the bottom of the shaft in the balancing block correction and press-fitting station; the shaft plate continues to move horizontally to the set position, thereby aligning the axial position of the shaft; Step 6-2, heating the rotor for loading: using a rotor transfer mechanism to flip, transfer and sleeve the heated rotor onto the outer periphery of the top of the shaft after the shaft is aligned; Step 6-3, pressing down the rotor: while keeping the rotating shaft aligned, the height of the rotor pressing rod is lowered to press down the heated rotor being loaded; during the pressing down of the rotor, an axial limiting sleeve is provided in the movement body and sleeved on the outer circumference of the rotating shaft to achieve the press-fitting limit of the rotor. After the rotor is pressed, the bottom surface of the rotor and the top surface of the movement body have a set axial gap B; Step 7, rotor cooling: Move the movement body after balancing block correction and press-fitting to the cooling station, and the cooling device cools the rotor; when the rotor is cooled to the set temperature, the gap return mechanism lowers the top block in the cooling station to the initial set height and enters the next cycle.

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