Shaft pressing device of rotor core

Abstract

The utility model relates to the technical field of manufacturing process equipment of rotor cores for motors, in particular to a shaft pressing device of a rotor core. Comprising a vertical rack, a top cross beam plate arranged at the top of the vertical rack, a fixed platform arranged on the vertical rack and located below the top cross beam plate, and a servo electric cylinder arranged on the top cross beam plate. The lifting plate is movably arranged between the top cross beam plate and the fixed platform in the vertical direction and connected with a telescopic rod of the servo electric cylinder, and the rotor shaft chuck is fixedly installed in the center of the lower end face of the lifting plate and used for clamping the outer circle of the upper portion of a rotor shaft. The rotor iron core positioning die is fixedly arranged at the central part of the upper end surface of the fixed platform; and the rotor iron core positioning die and the fixed platform are respectively and correspondingly provided with central through holes which are coaxial with each other and are used for avoiding a rotor shaft during shaft pressing. According to the utility model, the efficiency and quality of rotor core shaft pressing are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to motor rotor core manufacturing process equipment technical field, concretely relates to a kind of press shaft device of rotor core. BACKGROUND

[0002] Motor rotor core is the core component of motor, and it is made of a plurality of core punching sheet laminations. The manufacturing process of typical rotor core is as follows: first, silicon steel sheet is punched into core punching sheet, then the core punching sheet is laminated and welded or buckled into rotor core in a mold to form the assembly of rotor core.

[0003] After the assembly of rotor core is completed, it needs to be assembled with rotor shaft. Since the assembly of rotor shaft needs to rely on a large pressure to be fitted into the inner hole of rotor core, the assembly of rotor shaft and rotor core is also commonly known as press shaft operation.

[0004] The press shaft operation in the prior art is carried out on a press machine. Specifically, the rotor core is pressed tightly on the workbench of the press machine by a pressing plate, the operator holds the rotor shaft, places the lower end of the outer circle to be assembled of the rotor shaft into the orifice of the rotor core, corrects the perpendicularity of the rotor shaft and the workbench of the press machine, opens the press head of the press machine to press down, and then the rotor shaft is pressed into the inner hole of the rotor core.

[0005] However, the above-mentioned press shaft operation has the disadvantages of low operation efficiency and unstable press shaft quality. In addition, although the rotor core and rotor shaft used for press shaft operation have been cleaned before, there is still a possibility of secondary pollution of the assembly surface during storage and circulation, which affects the assembly quality.

[0006] Therefore, it is necessary to improve the existing press shaft device to solve the above problems. CONTENT OF THE UTILITY MODEL

[0007] In order to solve the above problems, the utility model provides a kind of press shaft device of rotor core, which aims to improve the efficiency and quality of rotor core press shaft, and the specific technical scheme is as follows:

[0008] The application discloses a shaft pressing device of a rotor core, which comprises a vertical frame, a top beam plate arranged at the top position of the vertical frame, a fixed platform arranged on the vertical frame and located below the top beam plate, a servo cylinder arranged on the top beam plate, a lifting plate arranged between the top beam plate and the fixed platform in the up-down direction and connected with the telescopic rod of the servo cylinder, a rotor shaft chuck fixedly installed at the central position of the lower end surface of the lifting plate and used for clamping the outer circle of the upper part of the rotor shaft, and a rotor core positioning die fixedly installed at the central position of the upper end surface of the fixed platform, wherein the rotor core positioning die and the fixed platform are respectively provided with coaxial center through holes used for avoiding the rotor shaft during the shaft pressing.

[0009] Preferably, the rotor shaft chuck is a self-centering spring chuck.

[0010] Preferably, the rotor core positioning die is vertically provided with a plurality of positioning pieces used for positioning the winding slot of the rotor core.

[0011] Preferably, the cantilevered positioning piece arranged vertically adopts an elastic positioning piece, which has a certain positioning error compensation effect and can effectively compensate the misalignment error during assembly.

[0012] The positioning cooperation between the positioning piece and the winding slot of the rotor core can realize the rapid positioning of the rotor core on the rotor core positioning die.

[0013] In the utility model, the upper end of the lifting plate is vertically provided with a plurality of vertical guide columns, the top beam plate is correspondingly provided with a plurality of guide column holes, and the vertical guide columns are movably arranged on the guide column holes in the up-down direction.

[0014] Preferably, the guide column holes are provided with linear bearings, and the vertical guide columns are movably arranged on the inner holes of the linear bearings in the up-down direction.

[0015] As a further improvement of the utility model, a pressure sensor is connected between the lower end of the telescopic rod of the servo cylinder and the upper end surface of the lifting plate.

[0016] The pressure sensor is arranged, which is beneficial to the online monitoring of the pressing force of the shaft during the shaft pressing process and prevents the occurrence of faults during the shaft pressing operation.

[0017] As a further improvement of the utility model, a rotor shaft negative pressure cleaner for cleaning the rotor shaft outer circle to be assembled by negative pressure adsorption is arranged on the lifting plate, the rotor shaft negative pressure cleaner comprises a pair of first air cylinders arranged obliquely on the lifting plate and symmetrically relative to the center axis of the telescopic rod of the servo cylinder, a pair of hollow half rings arranged at the lower end of the piston rod of the pair of first air cylinders, negative pressure adsorption holes arranged densely on the inner hole wall of the hollow half rings and connected with the inside of the hollow half rings, the pair of hollow half rings are butt-jointed into a whole circle after the piston rod of the pair of first air cylinders moves obliquely downward, the whole circle is located at the periphery of the rotor shaft outer circle to be assembled and forms a gap for negative pressure cleaning between the whole circle and the rotor shaft outer circle to be assembled, and the hollow half rings are connected with a vacuum adsorption device through pipelines.

[0018] As a further improvement of the utility model, a rotor shaft negative pressure cleaner for cleaning the rotor shaft outer circle to be assembled by negative pressure adsorption is arranged on the lifting plate, the rotor shaft negative pressure cleaner comprises a pair of first air cylinders arranged obliquely on the lifting plate and symmetrically relative to the center axis of the telescopic rod of the servo cylinder, a pair of hollow half rings arranged at the lower end of the piston rod of the pair of first air cylinders, negative pressure adsorption holes arranged densely on the inner hole wall of the hollow half rings and connected with the inside of the hollow half rings, the pair of hollow half rings are butt-jointed into a whole circle after the piston rod of the pair of first air cylinders moves obliquely downward, the whole circle is located at the periphery of the rotor shaft outer circle to be assembled and forms a gap for negative pressure cleaning between the whole circle and the rotor shaft outer circle to be assembled, and the hollow half rings are connected with a vacuum adsorption device through pipelines.

[0019] Preferably, the vacuum adsorption device is a dust collector.

[0020] Preferably, a first photoelectric displacement sensor for detecting the distance of the upper end surface of the rotor shaft is arranged at the inner rear end position of the rotor shaft chuck, and a second photoelectric displacement sensor downwardly pointing to the lifting plate is arranged at the lower end of the top beam plate.

[0021] In the utility model, the servo cylinder, the first photoelectric displacement sensor, the second photoelectric displacement sensor, the first air cylinder and the second air cylinder are connected with the control system of the pressure shaft device respectively.

[0022] Preferably, a center center pin coaxial with the inner hole of the rotor core is arranged at the upper end of the hollow cylinder, and the center center pin is used for stopping the lower end center hole of the rotor shaft during the assembly of the rotor shaft.

[0023] The working principle of the utility model is as follows:

[0024] (1) rotor shaft clamping: the operator grabs the rotor shaft, and the upper end of the rotor shaft is clamped and positioned in the rotor shaft chuck;

[0025] (2) The rotor shaft is cleaned in time: a pair of first air cylinders are opened, so that the hollow half ring at the front end of the piston rod of the pair of first air cylinders is close to the to-be-assembled outer circle of the rotor shaft and forms a cleaning gap with the to-be-assembled outer circle; then a vacuum adsorption device is opened, and the to-be-assembled outer circle of the rotor shaft is cleaned by negative pressure adsorption;

[0026] (3) The rotor core inner hole is cleaned: the second air cylinder is opened, so that the hollow cylinder at the top of the piston rod of the second air cylinder enters the rotor core inner hole and forms a cleaning gap with the rotor core inner hole; then the vacuum adsorption device is opened, and the rotor core inner hole is cleaned by negative pressure adsorption;

[0027] (4) Auxiliary positioning before assembly of the rotor shaft: the servo electric cylinder is opened, so that the lifting plate moves downward, thereby driving the rotor shaft to move downward together until the center hole at the lower end of the rotor shaft is positioned on the center thimble at the upper end of the hollow cylinder below;

[0028] (5) The rotor shaft is pressed and assembled: the telescopic rod of the servo electric cylinder and the piston rod of the second air cylinder move downward synchronously to press and assemble the rotor shaft; the control system controls the pressing depth of the rotor shaft according to the measurement data of the first and second photoelectric displacement sensors, so that the pressing and assembling of the rotor shaft are realized.

[0029] The rotor shaft is cleaned in time: a pair of first air cylinders are opened, so that the hollow half ring at the front end of the piston rod of the pair of first air cylinders is close to the to-be-assembled outer circle of the rotor shaft and forms a cleaning gap with the to-be-assembled outer circle; then a vacuum adsorption device is opened, and the to-be-assembled outer circle of the rotor shaft is cleaned by negative pressure adsorption;

[0030] First, the rotor core pressing shaft device of the utility model, the rotor core realizes fast positioning through the positioning sheet on the rotor core positioning die, and the efficiency of clamping positioning is high.

[0031] Second, the rotor core pressing shaft device of the utility model is provided with a rotor shaft negative pressure cleaner and a rotor core negative pressure cleaner, can realize instant negative pressure adsorption cleaning of the to-be-assembled outer circle of the rotor shaft and the to-be-assembled inner hole of the rotor core, can clean the secondary pollution of the rotor core and the rotor shaft in the production turnover process, thereby improving the assembly quality between the rotor shaft and the rotor core.

[0032] Third, the rotor core pressing shaft device of the utility model, the hollow cylinder upper end of the rotor core negative pressure cleaner is further provided with a center thimble, can utilize the center hole at the lower end of the rotor shaft to assist in positioning the rotor shaft, thereby can accurately correct the concentricity of the rotor shaft and the rotor core, thereby one step improves the practicability and reliability of the assembly between the rotor shaft and the rotor core, and can effectively place the assembly obstacles caused by rotor position errors.

[0033] Fourth, the rotor core pressing shaft device of the utility model, through the first and second photoelectric displacement sensors, the pressing depth of the rotor shaft can be accurately controlled. BRIEF DESCRIPTION OF DRAWINGS

[0034] Figure 1 It is a structural schematic diagram of a shaft pressing device for a rotor core of the utility model.

[0035] In the figure: 1. Vertical frame, 2. Top crossbeam, 3. Fixed platform, 4. Servo electric cylinder, 5. Lifting plate, 6. Rotor shaft chuck, 7. Rotor core positioning mold, 8. Center through hole, 9. Positioning plate, 10. Vertical guide column, 11. Linear bearing, 12. Pressure sensor, 13. Rotor shaft negative pressure cleaner, 14. First cylinder, 15. Hollow half ring, 16. Negative pressure adsorption hole, 17. Rotor core negative pressure cleaner, 18. Second cylinder, 19. Hollow cylinder, 20. First photoelectric displacement sensor, 21. Second photoelectric displacement sensor, 22. Rotor core, 23. Rotor shaft, 24. Center ejector. DETAILED DESCRIPTION

[0036] The following embodiments are used to further describe the specific embodiments of the present invention in conjunction with the accompanying drawings and examples. The following embodiments are only used to more clearly illustrate the technical solutions of the present invention and are not intended to limit the scope of protection of the present invention.

[0037] like Figures 1 to 1 The figure shows an embodiment of a rotor core pressing device of the present invention, which includes a vertical frame 1, a top cross beam plate 2 arranged at the top position of the vertical frame 1, a fixed platform 3 arranged on the vertical frame 1 and located below the top cross beam plate 2, a servo electric cylinder 4 arranged on the top cross beam plate 2, a lifting plate 5 that moves in the up and down directions and is arranged between the top cross beam plate 2 and the fixed platform 3 and connected to the telescopic rod of the servo electric cylinder 4, a rotor shaft clamp 6 fixedly installed at the center of the lower end surface of the lifting plate 5 for clamping the upper outer circle of the rotor shaft 23, and a rotor core positioning mold 7 fixedly installed at the center of the upper end surface of the fixed platform 3. The rotor core positioning mold 7 and the fixed platform 3 are respectively provided with coaxial center through holes 8 for avoiding the rotor shaft 23 during pressing.

[0038] Preferably, the rotor shaft chuck 6 is a self-centering spring chuck.

[0039] Preferably, a number of positioning pieces 9 for positioning the winding slots of the rotor core are vertically provided on the rotor core positioning mold 7 .

[0040] Preferably, the vertically arranged cantilevered positioning piece 9 is preferably an elastic positioning piece, which has a certain positioning error compensation function and can effectively compensate for the misalignment error during assembly.

[0041] The above-mentioned positioning cooperation between the positioning piece 9 and the rotor core winding slot can realize the rapid positioning of the rotor core 22 on the rotor core positioning mold 7.

[0042] In this embodiment, the upper end of the lifting plate 5 is vertically provided with a plurality of vertical guide columns 10, and the top beam plate 2 is correspondingly provided with a plurality of guide column holes. The vertical guide columns 10 are movably arranged in the guide column holes in the up-down direction.

[0043] Preferably, a linear bearing 11 is installed in the guide column hole, and the vertical guide column 10 is movably arranged in the inner hole of the linear bearing 11 in the up-down direction.

[0044] As a further improvement of this embodiment, a pressure sensor 12 is connected between the lower end of the telescopic rod of the servo cylinder 4 and the upper end surface of the lifting plate 5.

[0045] By providing the pressure sensor 12, it is beneficial to monitor the force of the pressure shaft online during the pressure shaft process, preventing the occurrence of faults during the pressure shaft operation.

[0046] As a further improvement of this embodiment, a rotor shaft negative pressure cleaner 13 for cleaning the outer circle of the rotor shaft 12 to be assembled by negative pressure adsorption is further provided on the lifting plate 5. The rotor shaft negative pressure cleaner 13 includes a pair of first air cylinders 14 obliquely arranged on the lifting plate 5 and symmetrically arranged with respect to the center axis of the telescopic rod of the servo cylinder 4, a pair of hollow Havercamp rings 15 correspondingly arranged at the lower end of the piston rod of the pair of first air cylinders 14, negative pressure adsorption holes 16 densely arranged on the inner hole wall of the hollow Havercamp ring 15 and connected with the inside of the hollow Havercamp ring 15, and the pair of hollow Havercamp rings 15 are butt-jointed into a whole circle after the piston rods of the pair of first air cylinders 14 move obliquely downward. The whole circle is located at the periphery of the rotor shaft 23 to be assembled and forms a gap for negative pressure cleaning between the whole circle and the rotor shaft 23 to be assembled. The hollow Havercamp ring 15 is connected with a vacuum adsorption device (not shown in the figure) through a pipeline.

[0047] As a further improvement of this embodiment, a rotor core negative pressure cleaner 17 for cleaning the inner hole of the rotor core 22 to be assembled by negative pressure adsorption is further provided at the lower position of the fixed platform 3. The rotor core negative pressure cleaner 17 includes a second air cylinder 18 arranged at the position directly below the center through hole 8 of the fixed platform 3. The top of the piston rod of the second air cylinder 18 is provided with a hollow cylinder 19, and the outer circle of the hollow cylinder 19 is densely provided with negative pressure adsorption holes 16 connected with the inside of the hollow cylinder 19. After the piston rod of the second air cylinder 18 rises, the hollow cylinder 19 enters the inner hole of the rotor core 22 and forms a gap for negative pressure cleaning between the hollow cylinder 19 and the inner hole of the rotor core 22. The hollow cylinder 19 is connected with a vacuum adsorption device (not shown in the figure) through a pipeline.

[0048] Preferably, the vacuum adsorption device is a dust collector.

[0049] Preferably, a first photoelectric displacement sensor 20 is arranged at the inner rear end of the rotor shaft chuck 6 to detect the distance of the upper end surface of the rotor shaft 23; and a second photoelectric displacement sensor 21 is arranged at the lower end of the top beam plate 2 to point downward to the lifting plate 5.

[0050] In this embodiment, the servo cylinder 4, the first photoelectric displacement sensor 20, the second photoelectric displacement sensor 21, the first cylinder 14 and the second cylinder 18 are respectively connected to the control system of the press shaft device.

[0051] Preferably, the upper end of the hollow cylinder 19 is provided with a center pin 24 coaxial with the inner hole of the rotor core 22. The center pin 24 is used to stop the lower end center hole of the rotor shaft 23 during assembly of the rotor shaft 23.

[0052] The working principle of this embodiment is as follows:

[0053] (1) Rotor shaft clamping: the operator grabs the rotor shaft 23 and clamps and positions the upper end of the rotor shaft 23 in the rotor shaft chuck 6;

[0054] (2) Instantaneous cleaning of the rotor shaft: a pair of first cylinders 14 are opened, so that the hollow collar 15 at the front end of the piston rod of the pair of first cylinders 14 approaches the to-be-assembled outer circle of the rotor shaft 23 and forms a cleaning gap with the to-be-assembled outer circle; then the vacuum suction device is opened to perform negative pressure suction cleaning on the to-be-assembled outer circle of the rotor shaft 23;

[0055] (3) Cleaning of the inner hole of the rotor core: the second cylinder 28 is opened, so that the hollow cylinder 19 at the top of the piston rod of the second cylinder 28 enters the inner hole of the rotor core 22 and forms a cleaning gap with the inner hole of the rotor core 22; then the vacuum suction device is opened to perform negative pressure suction cleaning on the inner hole of the rotor core 22;

[0056] (4) Auxiliary positioning before assembly of the rotor shaft: the servo cylinder 4 is opened, so that the lifting plate 5 moves downward, thereby driving the rotor shaft 23 to move downward together, until the center hole at the lower end of the rotor shaft 23 is positioned on the center pin 24 at the upper end of the lower hollow cylinder 19;

[0057] (5) Pressing of the rotor shaft: the telescopic rod of the servo cylinder 4 and the piston rod of the second cylinder 18 move downward synchronously to perform pressing of the rotor shaft 23; the control system controls the pressing depth of the rotor shaft 23 according to the measurement data of the first photoelectric displacement sensor 20 and the second photoelectric displacement sensor 21, thereby realizing pressing of the rotor shaft 23.

[0058] The above merely is the preferred implementation manner of the present application, and it should be noted that, for the ordinary skilled in the art, without departing from the technical principles of the present application, a number of improvements and refinements can be made, and these improvements and refinements should also be considered as the protection scope of the present application.

Claims

1. A rotor core pressing device, characterized in that: The invention comprises a vertical frame, a top cross beam plate arranged at the top position of the vertical frame, a fixed platform arranged on the vertical frame and located below the top cross beam plate, a servo electric cylinder arranged on the top cross beam plate, a lifting plate that moves in the up and down directions and is arranged between the top cross beam plate and the fixed platform and connected to the telescopic rod of the servo electric cylinder, a rotor shaft clamp fixedly installed at the center of the lower end surface of the lifting plate for clamping the upper outer circle of the rotor shaft, and a rotor core positioning mold fixedly installed at the center of the upper end surface of the fixed platform. The rotor core positioning mold and the fixed platform are respectively provided with coaxial center through holes for avoiding the rotor shaft when pressing the shaft.

2. The rotor core pressing device according to claim 1, characterized in that: A number of positioning pieces for positioning the winding slots of the rotor core are vertically arranged on the rotor core positioning die.

3. The rotor core pressing device according to claim 1, characterized in that: A number of vertical guide columns are erected on the upper end of the lifting plate, and a number of guide column holes are correspondingly provided on the top crossbeam plate. The vertical guide columns are arranged on the guide column holes so as to move in the up and down directions.

4. The rotor core pressing device according to claim 3, characterized in that: A linear bearing is installed in the guide post hole, and the vertical guide post is arranged on the inner hole of the linear bearing so as to move in the up and down directions.

5. The rotor core pressing device according to claim 1, characterized in that: A pressure sensor is connected between the lower end of the telescopic rod of the servo electric cylinder and the upper end surface of the lifting plate.

6. The rotor core pressing device according to claim 1, characterized in that: A rotor shaft negative pressure cleaner for cleaning the outer circle of the rotor shaft to be assembled by negative pressure adsorption is also provided on the lifting plate. The rotor shaft negative pressure cleaner includes a pair of first cylinders obliquely arranged on the lifting plate and symmetrically arranged relative to the central axis of the telescopic rod of the servo electric cylinder, a pair of hollow half rings correspondingly arranged at the lower ends of the piston rods of the pair of first cylinders, and negative pressure adsorption holes densely distributed on the inner hole wall of the hollow half ring and connected to the interior of the hollow half ring. After the piston rods of the pair of first cylinders move obliquely downward, the pair of hollow half rings are docked to form a full circle. The full circle is located on the periphery of the outer circle of the rotor shaft to be assembled and forms a gap for negative pressure cleaning between the outer circle of the rotor shaft to be assembled; the hollow half ring is connected to the vacuum adsorption device through a pipeline.

7. The rotor core pressing device according to claim 6, characterized in that: A rotor core negative pressure cleaner for cleaning the inner hole of the rotor core to be assembled by negative pressure adsorption is also provided below the fixed platform. The rotor core negative pressure cleaner includes a second cylinder arranged directly below the central through hole of the fixed platform, a hollow cylinder is provided on the top of the piston rod of the second cylinder, and negative pressure adsorption holes connected to the interior of the hollow cylinder are densely distributed on the outer circle of the hollow cylinder; after the piston rod of the second cylinder rises, the hollow cylinder enters the inner hole of the rotor core and forms a gap for negative pressure cleaning with the inner hole of the rotor core; the hollow cylinder is connected to the vacuum adsorption device through a pipeline.

8. A rotor core pressing device according to claim 7, characterized in that: A first photoelectric displacement sensor for detecting the distance between the upper end faces of the rotor shaft is provided at the rear end of the rotor shaft chuck; a second photoelectric displacement sensor pointing downward to the lifting plate is provided at the lower end of the top crossbeam.

9. The rotor core pressing device according to claim 8, characterized in that: The servo electric cylinder, the first photoelectric displacement sensor, the second photoelectric displacement sensor, the first air cylinder and the second air cylinder are respectively connected to the control system of the shaft pressing device.

10. The rotor core pressing device according to claim 9, characterized in that: A center pin coaxial with the inner hole of the rotor core is provided at the upper end of the hollow cylinder.

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