NZ759258A - Rotary stacking device for rotor core - Google Patents

Abstract

The purpose of the present invention is to provide a rotary stacking device for a rotor core, which can realize the staggered press-fitting of a number of cores on a rotor shaft and have high assembly accuracy. The device comprises a platform, wherein a press is supported and fixed on an upper side of the platform; a fixation mechanism for fixing a rotor shaft is arranged at a lower end of an output end of the press; a turntable linked with a driving mechanism is arranged a lower side of the fixation mechanism; the turntable is rotated by the driving mechanism; a core accommodating groove for accommodating a core is formed on the turntable; a number of positioning bumps for positioning the core are arranged on a wall of the core accommodating groove; a number of core grooves, running through the core from upper and lower sides, are arranged on a circumferential side of the core; outer edges of the positioning bumps are the same as inner edges of the core grooves in shape; and, an evading groove for evading a lower end of the rotor shaft is formed on the turntable.

Description

ROTARY STACKING DEVICE FOR ROTOR CORE Technical Field of the Invention The present invention relates to a device for assembling motor parts, and in particular to a rotary stacking device for a rotor core.

Background of the Invention Multiple rotor cores need to be press-fitted on some rotor shafts, and a number of core grooves running through the rotor core from upper and lower sides are arranged on a circumferential side of each of the rotor cores. Core grooves on two adjacent rotor cores on the rotor shaft need to be arranged in a staggered manner, that is, one of two adjacent rotor cores needs to be rotated at a certain angle relative to the other one of the two adjacent rotor cores. In the prior art, the rotor cores are manually rotated and press-fitted. The assembly of the rotor is very complex and time-consuming, and the assembly accuracy is low (it is difficult to determine an angle at which two adjacent rotor cores are staggered).

Summary of the Invention The purpose of the present invention is to provide a rotary stacking device for a rotor core, which can realize the staggered press-fitting of a number of cores on a rotor shaft and have high assembly accuracy.

For this purpose, the present invention employs the following technical solutions. A rotary stacking device for a rotor core is provided, including a platform, wherein a press is supported and fixed on an upper side of the platform; a fixation mechanism for fixing a rotor shaft is arranged at a lower end of an output end of the press; a turntable linked with a driving mechanism is arranged a lower side of the fixation mechanism; the turntable is rotated by the driving mechanism; a core accommodating groove for accommodating a core is formed on the turntable; a number of positioning bumps for positioning the core are arranged on a wall of the core accommodating groove; a number of core grooves, running through the core from upper and lower sides, are formed on a circumferential side of the core; outer edges of the positioning bumps are the same as inner edges of the core grooves in shape; and, an evading groove for evading a lower end of the rotor shaft is formed on the turntable.

When in use of the device of the present invention, a rotor shaft is fixed on the lower side of the press, and a rotor core is then placed in the core accommodating groove. Subsequently, first press-fitting is performed by the press to press-fit the rotor shaft with the first core. After the press is reset, a second core is placed, the turntable is rotated to stagger two adjacent cores, and second press-fitting is performed. The above operation is repeated until all cores are press-fitted on the rotor shaft. In this way, the production efficiency is improved, and the two adjacent cores are staggered at an angle. The displacement distance of the rotor shaft, which is realized by the press each time, is controlled by setting programs, and a PLC is provided as required to electrically control the press.

Preferably, an upper press block and a lower press block are arranged on a lower side of the press; the upper press block is fixed to the output end of the press; a fixation groove running through the lower press block from upper and lower sides is formed on the lower press block; the fixation groove includes an upper fixation groove and a lower fixation groove, with the inner diameter of the upper fixation groove being greater than that of the lower fixation groove; a press rod is arranged in the fixation groove; the press rod has a thicker upper section and a thinner lower section to form a step shape, and the upper section of the press rod is located in the upper fixation groove; the fixation mechanism for fixing a rotor shaft is arranged on a lower side of the lower press block; a through slot, running through the fixation mechanism from upper and lower sides and being used for evading the rotor shaft, is formed on the fixation mechanism; and, a lower end of the lower section of the press rod passes through the fixation groove and extends into the through slot. The press rod is used for supporting the rotor shaft, so that the rotor shaft is prevented from ascending during the process of press-fitting the rotor shaft with the core.

Preferably, the fixation mechanism includes a pneumatic chuck.

Preferably, a spring accommodating groove running through the upper pr ess block downward is formed in the upper press block; the inner diameter of t he spring accommodating groove is less than that of the upper fixation groove ; a reset spring is arranged in the spring accommodating groove; and, a lower end of the reset spring is resisted against an upper end face of the press rod.

By the reset spring, a certain elastic gap is provided for the press rod in the a xial direction, so that the rigid contact of the press rod with the rotor shaft is av oided. Accordingly, the damage to the end surface of the rotor shaft due to rigi d collision is avoided.

Preferably, a fixed seat is arranged on the platform; an accommodating groove for accommodating the turntable is formed on the fixed seat; the turntable includes an upper turntable section with the core accommodating groove and a lower turntable section extending downward to be linked with the driving mechanism; a buffer spring is arranged in the accommodating groove; and, the buffer spring is sheathed on the upper turntable section, and the buffer spring comes into contact with a lower end face of the upper turntable section. The buffer spring is used for buffering the pressure applied to the turntable by the press, so that the damage to the turntable and the driving mechanism is avoided.

Preferably, a fixed sleeve is arranged below the platform; a bearing is arranged in the fixed sleeve; the lower turntable section is fixed to the bearing; the driving mechanism includes a rotating shaft arranged vertically; and, an upper end of the rotating shaft is extended into the fixed sleeve and then fixed to the bearing. The coaxiality of the turntable with the rotor shaft after the turntable is rotated is ensured by the bearing.

Preferably, the turntable includes a turntable body; a number of fixed blocks, at least including a first fixed block, a second fixed block and a third fixed block, are arranged in the fixation groove on the turntable body; the first fixed block is located above the second fixed block, and the second fixed block is located above the third fixed block; the core accommodating groove is formed on the first fixed block; a copper sleeve accommodating groove for positioning a copper sleeve is formed on the second fixed block; and, the evading groove is formed on the third fixed block. With this arrangement, the present invention can be used for press-fitting various types of rotor shafts, and the first fixed block, the second fixed block and the third fixed block may be selected as required.

Preferably, an annular groove running through the platform upward is formed on the platform, a limiting ring is formed on the lower turntable section to limit the fixed seat between a lower end face of the upper turntable section and an upper end face of the limiting ring, and the annular groove is used for evading the limiting ring. With this arrangement, the turntable is prevented from separating upward from the fixed seat.

Preferably, a glue dispensing mechanism is arranged on the platform; the glue dispensing mechanism includes a linear driving device and a clamping jaw; the clamping jaw is moved to a position directly below the fixation mechanism by the linear driving device; a clamping groove for clamping the rotor shaft is formed on the clamping jaw; and, an oil outlet is formed on a wall of the clamping groove. Glue is dispensed on the rotor shaft during the press-fitting process of the core, so that the effect of fixing the core and the rotor shaft is improved.

The device of the present invention can realize the staggered press-fitting of a number of cores on a rotor shaft and have high assembly accuracy.

Brief Description of the Drawings Fig. 1 is a schematic structure diagram of the present invention; Fig. 2 is a sectional view of the present invention; Fig. 3 is an enlarged view of A in Fig. 1; Fig. 4 is a sectional view of the coordination of the turntable and the fixed seat according to the present invention; and Fig. 5 is a schematic structure diagram of the turntable according to the present invention.

Detailed Description of the Invention The present invention will be further described below by specific embodiments with reference to the accompanying drawings.

As shown in Figs. 1-5, the present invention provides a rotary stacking device for a rotor core, including a platform 1. A press 11 is supported and fixed on an upper side of the platform 1. A fixation mechanism 3 for fixing a rotor shaft 2 is arranged at a lower end of an output end of the press 11. A turntable 4 linked with a driving mechanism 5 is arranged a lower side of the fixation mechanism 3. The turntable 4 is rotated by the driving mechanism 5. A core accommodating groove 4 for accommodating a core 21 is formed on the turntable 4. A number of positioning bumps 401 for positioning the core 21 are arranged on the core accommodating groove 4, and a number of core grooves, running through the core from upper and lower sides, are formed on a circumferential side of the core 21. Outer edges of the positioning bumps 401 are the same as inner edges of the core grooves in shape. An evading groove 402 for evading a lower end of the rotor shaft 2 is formed on the turntable 4.

An upper press block 12 and a lower press block 13 are arranged on a lower side of the press 11. The upper press block 12 is fixed to the output end of the press 11. A fixation groove running through the lower press block 13 from upper and lower sides is formed on the lower press block 13. The fixation groove includes an upper fixation groove and a lower fixation groove. The inner diameter of the upper fixation groove is greater than that of the lower fixation groove. A press rod 6 is arranged in the fixation groove. The press rod has a thicker upper section and a thinner lower section to form a step shape, and the upper section 61 of the press rod is located in the upper fixation groove. The fixation mechanism 3 for fixing a rotor shaft 2 is arranged on a lower side of the lower press block 13. A through slot, running through the fixation mechanism 3 from upper and lower sides and being used for evading the rotor shaft 2, is formed on the fixation mechanism 3. A lower end of the lower section 62 of the press rod passes through the fixation groove and extends into the through slot. The fixation mechanism 3 includes a pneumatic chuck.

A spring accommodating groove 14 running through the upper press block 12 downward is formed in the upper press block 12. The inner diameter of the spring accommodating groove 14 is less than that of the upper fixation groove.

A reset spring is arranged in the spring accommodating groove 14, and a lower end of the reset spring is resisted against an upper end face of the press rod 6.

A fixed seat 7 is arranged on the platform 1. An accommodating groove 71 for accommodating the turntable 4 is formed on the fixed seat 7. The turntable 4 includes an upper turntable section 41 with the core accommodating groove 4 and a lower turntable section 42 extending downward to be linked with the driving mechanism 5. A buffer spring 72 is arranged in the accommodating groove 71. The buffer spring 72 is sheathed on the upper turntable section 42, and the buffer spring 72 comes into contact with a lower end face of the upper turntable section 41.A fixed sleeve 10 is arranged below the platform 1, a bearing 19 is arranged in the fixed sleeve 10, and the lower turntable section 42 is fixed to the bearing 19. The driving mechanism 5 includes a rotating shaft 51 arranged vertically. An upper end of the rotating shaft 51 is extended into the fixed sleeve 10 and then fixed to the bearing 19.

The turntable 4 includes a turntable body 410. A number of fixed blocks, at least including a first fixed block 411, a second fixed block 412 and a third fixed block 413, are arranged in the fixation groove on the turntable body 410. The first fixed block 411 is located above the second fixed block 412, and the second fixed block 412 is located above the third fixed block 413. The core accommodating groove 4 is formed on the first fixed block 411. A copper sleeve accommodating groove 403 for positioning a copper sleeve 22 is formed on the second fixed block 412, and the evading groove 402 is formed on the third fixed block 413.

An annular groove 16 running through the platform 1 upward is formed on the platform 1, a limiting ring is formed on the lower turntable section 42 to limit the fixed seat 7 between a lower end face of the upper turntable section 41 and an upper end face of the limiting ring, and the annular groove 16 is used for evading the limiting ring. In this embodiment, the limiting ring is a split washer.

The limiting ring may also be a nut or other limiting members.

As shown in Figs. 1-2, a glue dispensing mechanism 9 is arranged on the platform 1. The glue dispensing mechanism 9 includes a linear driving device 91 and a clamping jaw 92. The clamping jaw 92 is moved to a position directly below the fixation mechanism 3 by the linear driving device 91. A clamping groove 93 for clamping the rotor shaft 2 is formed on the clamping jaw 92, and an oil outlet 94 is formed on a wall of the clamping groove 93. In this embodiment, the linear driving device 91 is an air cylinder, and the clamping jaw 92 is an air-cylinder clamping jaw.

When in use of the device of the present invention, the first fixed block, the second fixed block and the third fixed block are selected according to the type of parts of the rotor. The rotor shaft is first fixed on the lower side of the press by the fixation mechanism (pneumatic chuck), a copper sleeve is then placed in the copper sleeve accommodating groove, and the press is controlled to descend. Subsequently, the rotor shaft is clamped by the clamping jaw and dispensed with glue by the glue dispensing mechanism. The glue dispensing mechanism is reset, and first press-fitting is performed by the press to press-fit the rotor shaft with the first copper sleeve. After the press is reset, a first core is placed, and second press-fitting is performed by the press to press-fit the rotor shaft with the first core. After the press is reset, a second core is placed, the turntable is rotated to stagger two adjacent cores, and third press-fitting is performed. The above operation is repeated until all cores are press-fitted on the rotor shaft. Finally, another copper sleeve is placed in the copper sleeve accommodating groove, and the rotor shaft is press-fitted with the second copper sleeve. The displacement distance of the rotor shaft, which is realized by the press each time, is controlled by setting programs, to avoid over press-fitting of the copper sleeve and the core.

Claims (9)

Claims 1.

1. A rotary stacking device for a rotor core, comprising a platform, wherein a press is supported and fixed on an upper side of the platform; a fixation mechanism for fixing a rotor shaft is arranged at a lower end of an output end of the press; a turntable linked with a driving mechanism is arranged a lower side of the fixation mechanism; the turntable is rotated by the driving mechanism; a core accommodating groove for accommodating a core is formed on the turntable; a number of positioning bumps for positioning the core are arranged on a wall of the core accommodating groove; a number of core grooves, running through the core from upper and lower sides, are formed on a circumferential side of the core; outer edges of the positioning bumps are the same as inner edges of the core grooves in shape; and, an evading groove for evading a lower end of the rotor shaft is formed on the turntable.

2. The rotary stacking device for a rotor core according to claim 1, wherein an upper press block and a lower press block are arranged on a lower side of the press; the upper press block is fixed to the output end of the press; a fixation groove running through the lower press block from upper and lower sides is formed on the lower press block; the fixation groove comprises an upper fixation groove and a lower fixation groove, with the inner diameter of the upper fixation groove being greater than that of the lower fixation groove; a press rod is arranged in the fixation groove; the press rod has a thicker upper section and a thinner lower section to form a step shape, and the upper section of the press rod is located in the upper fixation groove; the fixation mechanism for fixing a rotor shaft is arranged on a lower side of the lower press block; a through slot, running through the fixation mechanism from upper and lower sides and being used for evading the rotor shaft, is formed on the fixation mechanism; and, a lower end of the lower section of the press rod passes through the fixation groove and extends into the through slot.

3. The rotary stacking device for a rotor core according to claim 2, wherein the fixation mechanism comprises a pneumatic chuck.

4. The rotary stacking device for a rotor core according to claim 2, wherein a spring accommodating groove running through the upper press block downward is formed in the upper press block; the inner diameter of the spring accommodating groove is less than that of the upper fixation groove; a reset spring is arranged in the spring accommodating groove; and, a lower end of the reset spring is resisted against an upper end face of the press rod.

5. The rotary stacking device for a rotor core according to claim 1, wherein a fixed seat is arranged on the platform; an accommodating groove for accommodating the turntable is formed on the fixed seat; the turntable comprises an upper turntable section with the core accommodating groove and a lower turntable section extending downward to be linked with the driving mechanism; a buffer spring is arranged in the accommodating groove; and, the buffer spring is sheathed on the upper turntable section, and the buffer spring comes into contact with a lower end face of the upper turntable section.

6. The rotary stacking device for a rotor core according to claim 5, wherein a fixed sleeve is arranged below the platform; a bearing is arranged in the fixed sleeve; the lower turntable section is fixed to the bearing; the driving mechanism comprises a rotating shaft arranged vertically; and, an upper end of the rotating shaft is extended into the fixed sleeve and then fixed to the bearing.

7. The rotary stacking device for a rotor core according to claim 5, wherein the turntable comprises a turntable body; a number of fixed blocks, at least including a first fixed block, a second fixed block and a third fixed block, are arranged in the fixation groove on the turntable body; the first fixed block is located above the second fixed block, and the second fixed block is located above the third fixed block; the core accommodating groove is formed on the first fixed block; a copper sleeve accommodating groove for positioning a copper sleeve is formed on the second fixed block; and, the evading groove is formed on the third fixed block.

8. The rotary stacking device for a rotor core according to claim 5, wherein an annular groove running through the platform upward is formed on the platform, a limiting ring is formed on the lower turntable section to limit the fixed seat between a lower end face of the upper turntable section and an upper end face of the limiting ring, and the annular groove is used for evading the limiting ring.

9. The rotary stacking device for a rotor core according to claim 1, wherein a glue dispensing mechanism is arranged on the platform; the glue dispensing mechanism comprises a linear driving device and a clamping jaw; the clamping jaw is moved to a position directly below the fixation mechanism by the linear driving device; a clamping groove for clamping the rotor shaft is formed on the clamping jaw; and, an oil outlet is formed on a wall of the clamping groove.