Motor rotor shaft pressing device

Abstract

The application relates to the technical field of motor rotor processing, and relates to a motor rotor shaft pressing device, which comprises a workbench, a supporting table fixedly installed in a groove formed in the center of the workbench, and a shaft pressing pre-treatment mechanism arranged on a positioning mechanism; the position of a rotor iron core is locked through the positioning mechanism before the shaft is pressed, and meanwhile, the clamping and stripping mechanism is used for clamping and fixing, so that the center shaft is located at the center of the pressing joint during the pressing of the center shaft, the force balance of the pressing joint is ensured, the position deviation of the rotor iron core during the pressing of the shaft is avoided, the pressing effect is guaranteed, the positioning mechanism is matched with the shaft pressing pre-treatment mechanism to remove the impurities remaining in the iron core during the position calibration, the subsequent pressing of the shaft is guaranteed, and manual cleaning is not needed; the clamping and stripping mechanism releases the clamping while directly lifting the rotor iron core from the positioning table after the shaft is pressed, so that the shaft is prevented from being deviated due to the forcible separation of external force.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of motor rotor processing, and particularly relates to a motor rotor shaft pressing device. BACKGROUND

[0002] The motor rotor shaft pressing is an important production process of accurately and interference-pressing the shaft of the motor rotor into the rotor core, and is used to ensure that the rotor core and the shaft are absolutely reliable, without any loosening or relative movement, when the motor rotates at high speed and transmits torque. When the rotor rotates at high speed, the rotor core will be subjected to a huge centrifugal force and tends to fly outward, which needs to be borne and constrained by the shaft. Therefore, the iron core can be firmly bound on the shaft by pressing the shaft to prevent deformation or damage due to the centrifugal force.

[0003] The existing motor rotor shaft pressing needs to manually fix the iron core before processing, and then uses a hydraulic machine for cold pressing. Before cold pressing, it is necessary to ensure that the iron core is at the center of the pressing position, otherwise it is easy to cause the stress imbalance of the whole equipment. In addition, manual cleaning is needed before pressing the shaft to prevent impurities remaining on the inner wall of the iron core, which increases the labor intensity of the on-site workers. After pressing the center shaft, the stepped part on the shaft is easy to be stuck in the limiting area of the tool and difficult to fall off, and forcibly removing it from the outside may affect the accuracy of the center shaft or cause scratches on the surface of the rotor. Therefore, it is necessary to design a motor rotor shaft pressing device. SUMMARY

[0004] The purpose of the application is to provide a motor rotor shaft pressing device with simple structure and reasonable design to solve the above problems.

[0005] The application achieves the above purpose by the following technical scheme:

[0006] A motor rotor shaft pressing device, comprising a workbench, a support table fixedly installed in a groove formed in the center of the workbench, a positioning table arranged on the top of the support table, a clamping and stripping mechanism arranged on the positioning table, a lifting mechanism arranged in the support table, a positioning mechanism installed on the lifting mechanism, a shaft pre-processing mechanism arranged on the positioning mechanism, an upper support arranged on the top of the workbench, a hydraulic cylinder embeddedly installed in the upper support, and a pressing head arranged on the output end of the hydraulic cylinder.

[0007] The clamping and stripping mechanism comprises a sliding groove formed in the positioning table, a sliding bar slidably connected in the sliding groove, a connecting groove formed in one end of the sliding bar, and a connecting column slidably connected in the connecting groove. The connecting column is fixedly connected to the output end of a locking cylinder, and the locking cylinder is fixedly arranged in the positioning table. A force unloading and ejection mechanism is arranged on the sliding bar.

[0008] As a further optimization scheme of the present application, the force relieving ejection mechanism comprises a first supporting block and a second supporting block fixed on one side of the sliding bar, the top of the sliding bar is provided with a clamping frame, the first supporting block is slidingly connected in a straight slide, the second supporting block is slidingly connected in a curved slide, and the straight slide and the curved slide are both arranged on one side of the connecting groove.

[0009] As a further optimization scheme of the present application, the lifting mechanism comprises a side support fixed on the supporting table, a mounting frame is fixedly connected on the side support, guide rails are symmetrically arranged on the inner wall of the mounting frame, and lifting tables are slidingly connected on the guide rails.

[0010] As a further optimization scheme of the present application, a fixing frame is arranged on one side of the mounting frame, a lifting cylinder is fixedly installed in the fixing frame, the output end of the lifting cylinder is connected to one side of the lifting table, and an inner support is arranged between the two lifting tables.

[0011] As a further optimization scheme of the present application, the positioning mechanism comprises a center motor fixed in the inner support, a transmission screw is fixedly connected to the output end of the center motor, the transmission screw is in matched connection in a supporting sleeve, and the supporting sleeve is fixed on a supporting ring.

[0012] As a further optimization scheme of the present application, guide columns are slidingly connected in the through holes symmetrically arranged on the supporting ring, the top of the guide column is fixedly connected in a groove arranged at the bottom of a center sleeve, and a limiting ring is fixed to the bottom end of the guide column.

[0013] As a further optimization scheme of the present application, a positioning sleeve is arranged at the top of the center sleeve, a spring is arranged in the groove arranged at the bottom of the center sleeve, the spring is sleeved on the guide column, and the bottom end of the spring is connected to the supporting ring.

[0014] As a further optimization scheme of the present application, the pre-processing mechanism of the pressing shaft comprises a cleaning brush arranged on the side wall of the center sleeve, spherical protrusions are symmetrically arranged on both sides of the bottom of the center sleeve, a friction surface is arranged on the surface of the spherical protrusion, and the spherical protrusion is slidingly connected in a longitudinal slide.

[0015] As a further optimization scheme of the present application, the longitudinal slide is symmetrically arranged on the inner wall of an outer sleeve, supporting plates are symmetrically arranged on both sides of the bottom of the outer sleeve, and the supporting plates are fixedly installed on the inner support.

[0016] As a further optimization scheme of the present application, an annular slide is arranged at the top of the inner wall of the outer sleeve, a friction surface is arranged on the side wall of the annular slide, and the annular slide and the longitudinal slide are in communication with each other.

[0017] The present application has the following beneficial effects:

[0018] Before the present invention is pressed, the central motor in the inner support drives the transmission screw to rotate. During the rotation process, the central sleeve cannot rotate due to the limiting of the longitudinal slide and the spherical protrusion. At this time, the transmission screw and the support sleeve thread cooperation will drive the support ring and the central sleeve to move upwards along the longitudinal slide. During the upward movement, the central sleeve extends out of the outer sleeve from the top. The alignment sleeve at the top of the central sleeve enters the through hole in the center of the rotor core. The alignment sleeve forces the axis of the rotor core to be consistent with the axis of the central sleeve through the tapered surface at the top, so that the central shaft is in the center of the compression joint during the compression process. It ensures that the compression joint is in a state of force balance. At the same time, the locking cylinder pulls the sliding bar to slide into the inside of the sliding groove through the connecting column. The clamping frame at the top of the sliding bar locks the position of the rotor core to avoid position deviation of the rotor core during the compression process, which guarantees the compression effect.

[0019] The present invention drives the central sleeve to continuously move upwards through the rotation of the transmission screw, so that the central sleeve completely enters the through hole of the rotor core. The cleaning brush is attached to the inner wall of the through hole. At the same time, the spherical protrusion enters the annular slide from the longitudinal slide. At this time, the central sleeve rotates under the drive of the transmission screw to clean the through hole of the rotor core and remove impurities remaining in the through hole, which guarantees the smooth progress of the subsequent compression. It does not need to arrange artificial special cleaning, which reduces the labor intensity of the on-site staff.

[0020] After the present invention is compressed, the hydraulic cylinder drives the compression joint to return to the original position. The locking cylinder drives the sliding bar to slide out of the sliding groove through the connecting column. One end of the sliding groove moves linearly under the cooperation of the first supporting block and the linear slide. At the same time, the other end of the sliding groove is raised upwards along the path of the curved slide under the cooperation of the second supporting block and the curved slide. In this way, one end of the sliding bar directly lifts the rotor core from below, avoiding the rotor shaft from being inclined due to external force. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is the overall structure schematic diagram of the present invention;

[0022] Figure 2 is the installation position schematic diagram of the lifting mechanism of the present invention;

[0023] Figure 3 is the three-dimensional diagram of part of the structure of the present invention;

[0024] Figure 4 is Figure 3 is the local enlarged view of area A in the present invention;

[0025] Figure 5 is the exploded view of part of the structure of the present invention;

[0026] Figure 6 is the opening position schematic diagram of the linear slide and the curved slide of the present invention;

[0027] Figure 7 is a schematic diagram of the local structure of the application;

[0028] Figure 8 is a schematic diagram of the three-dimensional structure of the positioning table of the application.

[0029] In the figure: 1, workbench; 2, support table; 3, positioning table; 4, clamping and stripping mechanism; 5, lifting mechanism; 6, positioning mechanism; 7, pre-treatment mechanism for pressing shaft; 8, upper support; 9, hydraulic cylinder; 10, pressure connector; 40, clamping frame; 41, sliding groove; 42, sliding bar; 43, connecting groove; 44, connecting column; 45, locking cylinder; 46, first supporting block; 47, second supporting block; 48, straight sliding rail; 49, curved sliding rail; 51, side support; 52, mounting frame; 53, guide rail; 54, lifting platform; 55, lifting cylinder; 56, inner support; 61, center motor; 62, transmission screw; 63, support sleeve; 64, support ring; 65, guide column; 66, center sleeve; 67, limiting ring; 68, alignment sleeve; 69, spring; 71, cleaning brush; 72, spherical protrusion; 73, longitudinal sliding rail; 74, outer sleeve; 75, support plate; 76, annular sliding rail. DETAILED DESCRIPTION

[0030] The following further describes the application in conjunction with the drawings. It is necessary to point out here that the following detailed description is only used to further illustrate the application and cannot be understood as limiting the scope of protection of the application. Those skilled in the art can make some non-essential improvements and adjustments to the application according to the above application content.

[0031] Embodiment: Please refer to Figures 1-8 A motor rotor pressing shaft device, comprising a workbench 1, a support table 2 fixedly installed in a groove formed in the center of the workbench 1, a positioning table 3 provided on the top of the support table 2, the positioning table 3 being used to support a rotor core needing to be pressed, a clamping and stripping mechanism 4 provided on the positioning table 3 and used to fix the rotor core, a lifting mechanism 5 provided in the inside of the support table 2, a positioning mechanism 6 installed on the lifting mechanism 5, a pre-treatment mechanism 7 for pressing shaft provided on the positioning mechanism 6 and used to clean the inner wall of a through hole of the rotor core, the positioning mechanism 6 aligning the position of the rotor core before pressing shaft, and cooperating with the pre-treatment mechanism 7 to clean the through hole needing to be pressed, the lifting mechanism 5 driving the positioning mechanism 6 to move downward during the pressing shaft process, reserving space for pressing shaft, an upper support 8 provided on the top of the workbench 1 and used to install a hydraulic cylinder 9, a pressure connector 10 provided on the output end of the hydraulic cylinder 9, the hydraulic cylinder 9 being connected with an oil pump and an oil tank through a pipeline, and the hydraulic oil driving the pressure connector 10 to press downward after being input into the hydraulic cylinder 9, so as to cold-press a center shaft in the rotor core.

[0032] Please refer to Figures 2-3 , Figures 5-6 and Figure 8The clamping and stripping mechanism 4 comprises a sliding groove 41 formed on the positioning table 3, a sliding bar 42 slidably connected in the sliding groove 41, a clamping frame 40 fixed on the top of the sliding bar 42, a connecting groove 43 formed on one end of the sliding bar 42, a connecting column 44 slidably connected in the connecting groove 43, and a locking cylinder 45 fixedly connected on the output end of the connecting column 44. When the locking cylinder 45 drives the connecting column 44 to move back and forth, the connecting column 44 will pull the sliding bar 42 to slide in the sliding groove 41 through the connecting groove 43. The locking cylinder 45 is fixed in the positioning table 3 through a support. A force unloading and ejection mechanism is arranged on the sliding bar 42. The force unloading and ejection mechanism comprises a first supporting block 46 and a second supporting block 47 fixed on one side of the sliding bar 42, the first supporting block 46 is slidably connected in a straight slide 48, and the second supporting block 47 is slidably connected in a curved slide 49. The straight slide 48 and the curved slide 49 are both formed on one side of the connecting groove 43. When the rotor core is locked, the sliding bar 42 moves to the inside of the sliding groove 41 under the action of the locking cylinder 45, and then the clamping frame 40 above the sliding bar 42 is used to fix the rotor core. After the shaft is pressed, the locking cylinder 45 drives the sliding bar 42 to move outwards. With the sliding of the second supporting block 47 in the curved slide 49, one end of the sliding bar 42 will be raised upwards, and then the sliding bar 42 is used to lift the rotor core of the pressed central shaft.

[0033] Please refer to Figures 2-5 The lifting mechanism 5 comprises a side support 51 fixed on the support table 2 by bolts, an installation frame 52 fixedly connected on the side support 51, guide rails 53 symmetrically installed on the inner wall of the installation frame 52, lifting tables 54 slidably installed on the guide rails 53, a lifting cylinder 55 installed on one side of the installation frame 52 through a fixing frame, and the output end of the lifting cylinder 55 connected to one side of the lifting table 54. An inner support 56 is arranged between the two lifting tables 54, and the lifting cylinder 55 can drive the inner support 56 and the lifting table 54 to slide up and down along the guide rails 53.

[0034] Please refer to Figures 3-5 and Figure 7 The positioning mechanism 6 comprises a central motor 61 fixed on the inner support 56, a transmission screw 62 connected to the output end of the central motor 61 through a shaft coupling, the transmission screw 62 being threadedly connected in a support sleeve 63, the support sleeve 63 being fixed on a support ring 64, guide columns 65 being slidably connected in the through holes symmetrically formed on the support ring 64, the top of the guide column 65 being fixedly connected in a recess formed on the bottom of a central sleeve 66, and the bottom end of the guide column 65 being fixedly connected with a limiting ring 67, the top of the central sleeve 66 being provided with an alignment sleeve 68, the conical surface on the top of the alignment sleeve 68 being capable of contacting the through hole of the rotor core in the process of moving upwards, thereby centering the position of the rotor core, a spring 69 being arranged in the recess formed on the bottom of the central sleeve 66, the spring 69 being sleeved on the guide column 65, and the bottom end of the spring 69 being connected to the support ring 64.

[0035] Please refer to Figure 5 and Figure 7 , the pre-pressing mechanism 7 comprises a cleaning brush 71 arranged on the sidewall of the central sleeve 66, spherical protrusions 72 are symmetrically arranged on the bottom of the central sleeve 66, the spherical protrusions 72 are provided with a friction surface, the spherical protrusions 72 are slidingly connected in the longitudinal slide 73, the longitudinal slide 73 is symmetrically arranged on the inner wall of the outer sleeve 74, the bottom of the outer sleeve 74 is symmetrically fixedly provided with the support plates 75, the support plates 75 are fixedly installed on the inner support 56, the inner wall of the outer sleeve 74 is provided with the annular slide 76 at the top, the sidewall of the annular slide 76 is provided with a friction surface, the annular slide 76 and the longitudinal slide 73 are in communication, after cleaning, the central motor 61 is reversely and slowly rotated, in the rotating process, the support ring 64 is lowered along the transmission screw 62 in cooperation with the threaded connection, in the process, the tension spring 69 is stretched, when the spherical protrusion 72 is rotated to the position of the longitudinal slide 73, the central sleeve 66 drives the spherical protrusion 72 to fall into the longitudinal slide 73 again under the tension of the spring 69.

[0036] It should be noted that the motor rotor shaft pressing device, in use, first installs the insulating pad on the top of the rotor core, and places the rotor core on the positioning table 3, so that the rotor core is located between the clamping frames 40. Before pressing the shaft, the center motor 61 in the inner support 56 drives the transmission screw 62 to rotate. During rotation, the center sleeve 66 cannot rotate under the limitation of the longitudinal slide 73 and the spherical protrusion 72. At this time, the threaded cooperation between the transmission screw 62 and the support sleeve 63 will drive the support ring 64 and the center sleeve 66 to move upwards along the longitudinal slide 73. During the upward movement, the center sleeve 66 protrudes out of the outer sleeve 74 from the top, and the alignment sleeve 68 at the top of the center sleeve 66 enters the through hole in the center of the rotor core from the bottom. The alignment sleeve 68 will force the axis of the rotor core to be consistent with the axis of the center sleeve 66 through the conical surface at the top, so that the center shaft is located at the center of the compression joint 10 during compression, ensuring that the compression joint 10 is in force balance. At the same time, the locking cylinder 45 pulls the sliding bar 42 to slide into the sliding groove 41 through the connecting column 44, and the clamping frame 40 at the top of the sliding bar 42 locks the position of the rotor core, avoiding position deviation of the rotor core during shaft pressing, ensuring the shaft pressing effect. After the center sleeve 66 continuously moves upwards and completely enters the through hole of the rotor core with the rotation of the transmission screw 62, the cleaning brush 71 is attached to the inner wall of the through hole, and the spherical protrusion 72 enters the annular slide 76 from the longitudinal slide 73. At this time, the center sleeve 66 rotates under the drive of the transmission screw 62, cleaning the through hole of the rotor core and removing impurities remaining in the through hole, ensuring the smooth progress of subsequent shaft pressing, without the need for manual cleaning, reducing the labor intensity of on-site workers. After cleaning, the center motor 61 rotates in reverse at low speed. During rotation, the spherical protrusion 72 on the center sleeve 66 slides in the annular slide 76. The friction between the friction surface of the spherical protrusion 72 and the friction surface of the annular slide 76 is not enough to completely offset the rotation between the transmission screw 62 and the support sleeve 63. At this time, the transmission screw 62 will produce a rotational differential speed with the support ring 64, so that the support ring 64 moves downwards along the transmission screw 62 in cooperation with the threaded connection during rotation, gradually stretching the spring 69 in the process. The spring 69 changes from a compressed state to a stretched state and continuously accumulates elastic potential energy. After that, when the spherical protrusion 72 rotates to the position of the longitudinal slide 73, the center sleeve 66 will drive the spherical protrusion 72 to fall into the longitudinal slide 73 again under the tension of the spring 69. At this time, the center motor 61 drives the transmission screw 62 to rotate, making the entire center sleeve 66 move downwards and fall into the outer sleeve 74 again.The lifting cylinder 55 pulls the lifting platform 54 to move downward, reserving space for the downward pressing of the center rotating shaft, and then the center rotating shaft is inserted into the through hole of the rotor iron core from the top. Then, the hydraulic cylinder 9 drives the pressing joint 10 to move downward to contact the top of the center rotating shaft, and then continuously provides pressure, so that the center rotating shaft is cold-pressed into the rotor iron core, the pressing operation is completed, and then the hydraulic cylinder 9 drives the pressing joint 10 to return to the original position. The locking cylinder 45 drives the sliding bar 42 to slide out of the sliding groove 41 through the connecting column 44. One end of the sliding groove 41 moves linearly under the cooperation of the first supporting block 46 and the linear sliding rail 48, and the other end of the sliding groove 41 is lifted upward along the path of the curved sliding rail 49 under the cooperation of the second supporting block 47 and the curved sliding rail 49, so that one end of the sliding bar 42 directly lifts the rotor iron core from below, avoiding the rotor iron core from being forcibly separated to cause the rotating shaft to be inclined.

[0037] The above-mentioned embodiments only express several embodiments of the present application, and the description is more specific and detailed, but it cannot be understood as the limitation of the patent scope of the present application. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which belong to the protection scope of the present application.

Claims

1. An electric machine rotor press shaft device comprising a worktable, characterized in that: A groove is formed in the center of the workbench, and a support table is fixedly installed in the groove; the top of the support table is provided with a positioning table, the positioning table is provided with a clamping and stripping mechanism, the inside of the support table is provided with a lifting mechanism, the lifting mechanism is installed with a positioning mechanism, the positioning mechanism is provided with a pressing shaft pre-treatment mechanism, the top of the workbench is provided with an upper support, a hydraulic cylinder is embeddedly installed in the upper support, and a pressure connector is arranged on the output end of the hydraulic cylinder; The clamping and stripping mechanism comprises a sliding groove formed in the positioning table, a sliding bar is slidably connected in the sliding groove, a connecting groove is formed in one end of the sliding bar, a connecting column is slidably connected in the connecting groove, the connecting column is fixedly connected to the output end of a locking cylinder, the locking cylinder is fixedly connected to the positioning table, the sliding bar is provided with a force unloading and ejection mechanism, the force unloading and ejection mechanism comprises a first supporting block and a second supporting block fixedly connected to one side of the sliding bar, a clamping frame is arranged on the top of the sliding bar, the first supporting block is slidably connected to a straight sliding way, and the second supporting block is slidably connected to a curved sliding way. The pressing shaft pre-treatment mechanism comprises a cleaning brush and a spherical protrusion connected to the positioning mechanism, a friction surface is arranged on the surface of the spherical protrusion, and the spherical protrusion is slidably connected to a longitudinal sliding way.

2. An electric motor rotor shaft pressing device according to claim 1, characterized in that: The lifting mechanism comprises a side support fixedly connected to the support table, the side support is fixedly connected with a mounting frame, and guide rails are symmetrically arranged on the inner wall of the mounting frame and slidably connected with lifting tables.

3. An electric motor rotor shaft pressing device according to claim 2, characterized in that: A fixing frame is arranged on one side of the mounting frame, a lifting cylinder is fixedly installed in the fixing frame, the output end of the lifting cylinder is connected to one of the lifting tables, and an inner support is arranged between the two lifting tables.

4. An electric motor rotor shaft pressing device according to claim 3, characterized in that: The positioning mechanism comprises a central motor fixedly connected to the inner support, a transmission screw is fixedly connected to the output end of the central motor, the transmission screw is connected to a support sleeve, and the support sleeve is fixedly connected to a support ring.

5. An electric motor rotor shaft pressing device according to claim 4, characterized in that: Symmetrical through holes are formed in the support ring and slidably connected with guide columns, the top of the guide column is fixedly connected to a groove formed in the bottom of a central sleeve, the cleaning brush is arranged on the side wall of the central sleeve, the spherical protrusions are symmetrically arranged on the two sides of the bottom of the central sleeve, and the bottom end of the guide column is fixedly connected with a limiting ring.

6. An electric motor rotor shaft pressing device according to claim 5, characterized in that: A positioning sleeve is arranged on the top of the central sleeve, a spring is arranged in the groove formed in the bottom of the central sleeve, the spring is sleeved on the guide column, and the bottom end of the spring is connected to the support ring.

7. An electric motor rotor shaft pressing device according to claim 6, characterized in that: Symmetrical longitudinal sliding ways are formed in the inner wall of an outer sleeve, support plates are symmetrically arranged on the two sides of the bottom of the outer sleeve, and the support plates are fixedly installed on the inner support.

8. An electric motor rotor shaft pressing device according to claim 7, characterized in that: An annular sliding way is formed in the top of the inner wall of the outer sleeve, a friction surface is arranged on the side wall of the annular sliding way, and the annular sliding way and the longitudinal sliding way are in communication with each other.

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