CN213094032U

CN213094032U - Assembly fixture for rotating shaft and rotor core

Info

Publication number: CN213094032U
Application number: CN202022031550.3U
Authority: CN
Inventors: 王清华; 李广磊; 王英喆; 柳平平
Original assignee: Bafang Electric Suzhou Co Ltd
Current assignee: Bafang Electric Suzhou Co Ltd
Priority date: 2020-09-16
Filing date: 2020-09-16
Publication date: 2021-04-30
Anticipated expiration: 2030-09-16

Abstract

The utility model discloses a pivot and rotor core's assembly fixture, it relates to motor assembly technical field. The key point of the technical scheme is that the device comprises a bottom plate; the supporting base is arranged on the bottom plate, a positioning bottom groove used for bearing the rotor core is formed in the supporting base, and a limiting assembly used for limiting the circumferential angle of the rotor core is arranged on the supporting base; a top plate; the positioning top seat is arranged on the bottom wall of the top plate, a positioning top groove matched with the rotating shaft is formed in the bottom wall of the positioning top seat, and magnetic steel for adsorbing the rotating shaft is arranged in the positioning top seat; and the rotating shaft positioning assembly is arranged on the bottom wall of the top plate and used for limiting the circumferential angle of the rotating shaft. The utility model discloses can pack the pivot into the rotor iron-core according to the circumference angle of injecing to can improve production efficiency, and guarantee assembly quality.

Description

Assembly fixture for rotating shaft and rotor core

Technical Field

The utility model relates to a motor assembly technical field, more specifically say, it relates to a pivot and rotor core's assembly fixture.

Background

The brushless motor structure comprises a rotor and a stator, and is different from the brush motor in that the rotor of the brushless motor is permanent magnet steel which is connected with an output shaft together with a shell, the stator is a winding coil, and a commutating brush used for alternately changing an electromagnetic field of the brush motor is removed.

Referring to fig. 1, a rotor of a conventional brushless motor includes a rotor core 91 and a rotating shaft, where the rotating shaft includes a rotating shaft main body 92 and a bearing 922 sleeved on the rotating shaft main body 92, and meanwhile, an integrally formed gear portion 921 is disposed on the rotating shaft main body 92, and an end of the rotating shaft main body 92 protrudes out of an end surface of the gear portion 921; in order to realize the circumferential linkage of the rotating shaft and the rotor core 91, a flat key 911 is arranged on the inner wall of the shaft hole of the rotor core 91, and a key groove 923 matched with the flat key 911 is formed in the side wall of the rotating shaft main body 92.

When the rotor is assembled with the rotor core 91, on one hand, the flat key 911 is aligned with the key groove 923, and on the other hand, the interference of the magnetic field on the rotor core 91 to the rotor is overcome. Alignment under magnetic field interference is also difficult if done manually, resulting in inefficient production.

The prior Chinese patent with the publication number of CN210578166U discloses an assembly fixture for a rotor core and a rotating shaft, which comprises a base, a sliding seat, a lower supporting seat, an upper supporting seat, a supporting rod and a spring, wherein the center of the sliding seat is set as a boss, the upper end surface of the sliding seat is provided with the lower supporting seat in a fit manner, the inner ring surface of the lower supporting seat is in a fit manner to be the outer ring surface of the boss, and the rotor core is in a fit and press connection between the lower supporting seat and the upper supporting seat; the base is connected to the lower extreme of branch, and slide and lower carriage are passed and fixed through the nut to the upper end of branch, and the lower section of the upper end butt slide of spring and spring is established to the outer wall cover of branch, goes up to wear to establish the pivot in the supporting seat, and the lower extreme butt location boss of pivot, the pivot include the third section axle of first section axle and butt location boss, and pivot downstream compression spring is so that the inner wall of rotor core is impressed in the outer wall tight fit of first section axle.

The interference of a magnetic field to the rotating shaft can be overcome by the assembling tool, the rotating shaft can be aligned to the shaft hole of the rotor core, the rotating shaft cannot be limited to be aligned to the circumferential installation angle of the rotor core, namely, the flat key and the key groove cannot be aligned, the assembling efficiency can be influenced, meanwhile, the damage to parts is easily caused, and the quality of the parts and the assembling quality are influenced.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art exists, the utility model aims to provide a pivot and rotor core's assembly fixture, it can pack the pivot into the rotor core according to the circumference angle of injecing to can improve production efficiency, and guarantee assembly quality.

In order to achieve the above purpose, the utility model provides a following technical scheme:

the utility model provides an assembly fixture of pivot and rotor core, includes:

a base plate;

the supporting base is arranged on the bottom plate, a positioning bottom groove used for bearing the rotor core is formed in the supporting base, and a limiting assembly used for limiting the circumferential angle of the rotor core is arranged on the supporting base;

a top plate;

the positioning top seat is arranged on the bottom wall of the top plate, a positioning top groove matched with the rotating shaft is formed in the bottom wall of the positioning top seat, and magnetic steel for adsorbing the rotating shaft is arranged in the positioning top seat; and the number of the first and second groups,

and the rotating shaft positioning assembly is arranged on the bottom wall of the top plate and used for limiting the circumferential angle of the rotating shaft.

Furthermore, the limiting assembly comprises a sliding rod, and a limiting hole which is matched with the sliding rod and is coaxially communicated with the positioning bottom groove is formed in the supporting base; the inner side wall of the limiting hole is provided with a limiting bulge, and the side wall of the sliding rod is provided with a limiting groove matched with the limiting bulge;

a movable cavity communicated with the limiting hole is formed in the supporting base, a buffer spring is arranged in the movable cavity, and a sliding sleeve in contact with the bottom end of the sliding rod is arranged at the top end of the buffer spring;

the limiting groove can be matched with a flat key in a rotor iron core shaft hole, and when the sliding sleeve is contacted with the top wall in the movable cavity, the top end of the sliding rod protrudes out of the bottom wall in the positioning bottom groove.

Further, the sliding sleeve cross-section is the type of falling U.

Furthermore, the top end of the sliding rod is provided with a limiting groove matched with the end part of the rotating shaft.

Furthermore, the top wall in the positioning top groove is provided with a yielding sinking groove matched with the end part of the rotating shaft main body, the magnetic steel is embedded in the yielding sinking groove, and the magnetic steel is not contacted with the end part of the rotating shaft main body.

Further, the magnetic steel is fixed in the abdicating sinking groove through gluing.

Further, the rotating shaft positioning assembly comprises a fixing rod connected with the bottom wall of the top plate, a positioning rod capable of moving horizontally relative to the fixing rod is arranged on the fixing rod in a penetrating mode, and a positioning protrusion matched with the key groove is arranged at the end portion of the positioning rod.

Furthermore, a return spring is sleeved on the positioning rod, one end of the return spring is fixedly connected with one end of the positioning rod, which is far away from the positioning bulge, and the other end of the return spring is contacted with the fixing rod; a limiting pin penetrates through the positioning rod, and the limiting pin and the reset spring are respectively located on two sides of the fixing rod.

Further, wear to be equipped with two guide arms at least between bottom plate and the roof, the cover is equipped with on the guide arm and is located support spring between bottom plate and the roof, the guide arm top is provided with the limiting plate.

Further, the guide rod is sleeved with a ball sliding sleeve penetrating through the top plate, the ball sliding sleeve is in contact with the top end of the supporting spring, and a step seam allowance in contact with the bottom wall of the top plate is arranged on the outer side wall of the ball sliding sleeve.

To sum up, the utility model discloses following beneficial effect has:

1. the circumferential positioning angle of the rotor core is limited by the limiting assembly, and the circumferential positioning angle of the rotating shaft is limited by the rotating shaft positioning assembly, so that the circumferential angles of the flat key in the rotor core and the key groove on the rotating shaft are the same, and the flat key can be directly embedded into the key groove during press mounting without causing part damage, thereby improving the assembly efficiency and quality;

2. the top end of the sliding rod is provided with the sinking groove, so that the rotor after being assembled can be prevented from being toppled out to cause gouges, and the assembling quality can be improved;

3. the magnetic steel can adsorb and position the rotating shaft, and meanwhile, the magnetic steel and the rotating shaft are convenient to separate, and the structure is simple and ingenious.

Drawings

FIG. 1 is a schematic structural view of a rotating shaft;

FIG. 2 is a schematic structural view of a rotor core;

FIG. 3 is a schematic structural diagram of an assembly fixture for a rotating shaft and a rotor core in an embodiment;

fig. 4 is a schematic partial structure diagram of an assembly fixture for a rotating shaft and a rotor core in an embodiment.

In the figure: 1. a base plate; 2. a top plate; 3. a guide bar; 31. a support spring; 32. a ball sliding sleeve; 33. a limiting plate; 4. a support base; 41. positioning the bottom groove; 42. a movable cavity; 43. a limiting hole; 44. a limiting bulge; 5. a sliding sleeve; 51. a buffer spring; 6. a slide bar; 61. sinking a groove; 62. a limiting groove; 71. positioning the top seat; 72. a yielding sink groove; 73. magnetic steel; 74. positioning the top groove; 81. fixing the rod; 82. positioning a rod; 83. positioning the projection; 84. a return spring; 85. a spacing pin; 91. a rotor core; 911. a flat bond; 92. a rotating shaft main body; 921. a gear portion; 922. a bearing; 923. a keyway.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications to the present embodiment without inventive contribution as required after reading the present specification, but all of them are protected by patent laws within the scope of the claims of the present invention.

Example (b):

an assembly fixture for a rotating shaft and a rotor core, referring to fig. 1 to 4, comprises a bottom plate 1 and a top plate 2, wherein a supporting base 4 is arranged on the bottom plate 1, a positioning bottom groove 41 for bearing the rotor core 91 is formed in the top wall of the supporting base 4, and a limiting component for limiting the circumferential angle of the rotor core 91 is arranged on the supporting base 4; the bottom wall of the top plate 2 is provided with a positioning top seat 71, the bottom wall of the positioning top seat 71 is provided with a positioning top groove 74 matched with the rotating shaft, and a magnetic steel 73 for adsorbing the rotating shaft is arranged in the positioning top seat 71; simultaneously, 2 diapalls of roof are provided with the pivot locating component who is used for injecing pivot circumference angle, and pivot locating component and spacing subassembly cooperation can make flat key 911 relative with keyway 923 to assembly efficiency and quality can be improved.

Referring to fig. 3, at least two guide rods 3 penetrate between the bottom plate 1 and the top plate 2, and the guide rods 3 play a role in guiding and limiting and can ensure that the relative positions of the supporting base 4 and the positioning top seat 71 cannot deviate; the guide rod 3 is sleeved with a supporting spring 31 positioned between the bottom plate 1 and the top plate 2, meanwhile, the guide rod 3 is sleeved with a ball sliding sleeve 32 penetrating through the top plate 2, the ball sliding sleeve 32 is contacted with the top end of the supporting spring 31, and the outer side wall of the ball sliding sleeve 32 is provided with a step rabbet contacted with the bottom wall of the top plate 2; the top end of the guide rod 3 is provided with a limiting plate 33, and the outer diameter of the limiting plate 33 is larger than that of the ball sliding sleeve 32, so that the ball sliding sleeve 32 can be limited.

Referring to fig. 3, in the present embodiment, the bottom plate 1, the top plate 2, the guide rods 3, the support springs 31, the ball sliding sleeves 32, and the limit plates 33 form a universal mold frame structure, which is mounted on the device and assembled by driving the top plate 2 to move downward.

Referring to fig. 1 to 4, the limiting assembly in this embodiment includes a sliding rod 6, and a limiting hole 43, which is matched with the sliding rod 6 and coaxially communicated with the positioning bottom groove 41, is formed in the supporting base 4; the inner side wall of the limiting hole 43 is provided with a limiting bulge 44, and the side wall of the slide rod 6 is provided with a limiting groove 62 matched with the limiting bulge 44; a movable cavity 42 communicated with the limiting hole 43 is arranged in the supporting base 4, a buffer spring 51 is arranged in the movable cavity 42, and a sliding sleeve 5 in contact with the bottom end of the sliding rod 6 is arranged at the top end of the buffer spring 51; the limit groove 62 can be matched with a flat key 911 in a shaft hole of the rotor core 91, and when the sliding sleeve 5 is contacted with the inner top wall of the movable cavity 42, the top end of the sliding rod 6 protrudes out of the inner bottom wall of the positioning bottom groove 41; when the rotor core 91 is fitted into the positioning bottom groove 41, the flat key 911 in the shaft hole of the rotor core needs to be opposed to the limit groove 62 on the slide bar 6, so that the circumferential angle of the rotor core 91 can be limited.

Referring to fig. 1 to 4, in the embodiment, the cross section of the sliding sleeve 5 is an inverted U shape, and the top end of the buffer spring 51 contacts with the inner top wall of the sliding sleeve 5, so that the stability of the sliding sleeve 5 can be improved; the top end of the sliding rod 6 is provided with a sunk groove 61 matched with the end part of the rotating shaft, the rotor formed after the assembly of the rotor core 91 and the rotating shaft is upwards jacked under the elastic action of the buffer spring 51, if the rotating shaft is only in contact with the end surface of the sliding rod 6, the rotor is easily toppled over after being jacked out and causes gouging, the sunk groove 61 is arranged to avoid the problem, the rotor cannot be toppled over after being jacked up, and therefore the protection effect can be achieved.

Referring to fig. 1 and 3, the top wall of the positioning top groove 74 is provided with a yielding sunken groove 72 matched with the end of the rotating shaft main body 92, the magnetic steel 73 is embedded in the yielding sunken groove 72, and the magnetic steel 73 is not contacted with the end of the rotating shaft main body 92; magnet steel 73 is fixed in the heavy groove 72 of stepping down through anaerobic glue in this embodiment, when the contact of the top wall in gear portion 921 tip and the location top groove 74, pivot main part 92 tip stretches into in the heavy groove 72 of stepping down, and the clearance of pivot main part 92 terminal surface and magnet steel 73 terminal surface is 0.5mm in this embodiment to avoid both contacts when magnet steel 73 can adsorb the pivot, if magnet steel 73 contacts with pivot main part 92, then cause magnet steel 73 cracked during the pressfitting easily.

Referring to fig. 1 and 3, the rotating shaft positioning assembly includes a fixing rod 81 connected to the bottom wall of the top plate 2, a positioning rod 82 capable of moving horizontally relative to the fixing rod 81 is inserted into the fixing rod 81, and a positioning protrusion 83 engaged with the key slot 923 is disposed at an end of the positioning rod 82; the positioning rod 82 is moved to enable the positioning protrusion 83 to be embedded into the key groove 923, so that the circumferential angle of the rotating shaft can be limited.

Referring to fig. 3, a return spring 84 is sleeved on the positioning rod 82, one end of the return spring 84 is fixedly connected with one end of the positioning rod 82 far away from the positioning protrusion 83, and the other end of the return spring is in contact with the fixing rod 81; a limit pin 85 penetrates through the positioning rod 82, and the limit pin 85 and the return spring 84 are respectively positioned at two sides of the fixing rod 81; in a normal state, the positioning pin 85 is in contact with the fixing rod 81 under the action of the elastic force of the return spring 84, and the positioning rod 82 is in a contracted state; when the positioning rod 82 is used, the elastic force of the return spring 84 is overcome to move the positioning rod 82 to extend out, and after the positioning rod 82 is used, the positioning rod 82 can automatically reset under the action of the return spring 84, so that the operation is convenient.

The working principle is as follows:

during assembly, the rotor core 91 is placed in the positioning bottom groove 41, and meanwhile, the flat key 911 in the shaft hole of the rotor core 91 is embedded in the limiting groove 62 on the outer wall of the sliding rod 6, so that the circumferential angle of the rotor core 91 is limited, and positioning is realized.

The rotating shaft is embedded into the positioning top groove 74, and the rotating shaft cannot fall off under the action of the magnetic steel 73; then, the positioning rod 82 is extended out, and the angle of the rotating shaft is adjusted to enable the positioning protrusion 83 to be embedded into the key groove 923, so that the circumferential angle of the rotating shaft can be limited, and positioning is achieved.

The protruding 83 of location is the same with spacing recess 62 circumference angle, so under the limiting displacement of slide bar 6 and locating lever 82, the epaxial keyway 923 of commentaries on classics and the flat key 911 in rotor core 91, both circumference angles are the same, be about to in the vertical lapse of pivot flat key 911 can directly imbed keyway 923.

After the positioning is finished, the top plate 2 is controlled to move downwards, and the rotating shaft is embedded into the rotor core 91; in the process of downward movement of the rotating shaft, the rotating shaft main body 92 is firstly embedded into the shaft hole of the rotor core 91, the flat key 911 is embedded into the key groove 923, and then the rotating shaft main body 92 continues to move downward until the end part of the rotating shaft main body is embedded into the sinking groove 61; the rotating shaft continues to move downwards and drives the sliding rod 6 to move downwards, and the buffer spring 51 is compressed when the sliding rod 6 moves downwards; after the rotating shaft and the rotor core 91 are assembled in place, the top plate 2 moves upwards to reset, and the magnetic steel 73 cannot adsorb the assembled rotor, so that the rotor is left on the supporting base 4; after the positioning top seat 71 moves upwards, the sliding rod 6 moves upwards to reset under the action of the elastic force of the buffer spring 51, drives the rotor to move upwards to eject the rotor, and then takes the rotor down to complete the assembling process.

Claims

1. The utility model provides a pivot and rotor core's assembly fixture which characterized in that: the method comprises the following steps:

a base plate;

a top plate;

2. The assembly fixture for the rotating shaft and the rotor core according to claim 1, characterized in that: the limiting assembly comprises a sliding rod, and a limiting hole which is matched with the sliding rod and is coaxially communicated with the positioning bottom groove is formed in the supporting base; the inner side wall of the limiting hole is provided with a limiting bulge, and the side wall of the sliding rod is provided with a limiting groove matched with the limiting bulge;

3. The assembly fixture for the rotating shaft and the rotor core according to claim 2, characterized in that: the sliding sleeve cross-section is the type of falling U.

4. The assembly fixture for the rotating shaft and the rotor core according to claim 2, characterized in that: and the top end of the sliding rod is provided with a limiting groove matched with the end part of the rotating shaft.

5. The assembly fixture for the rotating shaft and the rotor core according to any one of claims 1 to 4, characterized in that: the top wall in the positioning top groove is provided with a yielding sinking groove matched with the end part of the rotating shaft main body, the magnetic steel is embedded in the yielding sinking groove, and the magnetic steel is not contacted with the end part of the rotating shaft main body.

6. The assembly fixture for the rotating shaft and the rotor core according to claim 5, characterized in that: the magnetic steel is fixed in the abdicating sinking groove by gluing.

7. The assembly fixture for the rotating shaft and the rotor core according to any one of claims 1 to 4, characterized in that: the rotating shaft positioning assembly comprises a fixed rod connected with the bottom wall of the top plate, a positioning rod capable of moving horizontally relative to the fixed rod is arranged on the fixed rod in a penetrating mode, and a positioning protrusion matched with the key groove is arranged at the end portion of the positioning rod.

8. The assembly fixture for the rotating shaft and the rotor core according to claim 7, characterized in that: a reset spring is sleeved on the positioning rod, one end of the reset spring is fixedly connected with one end of the positioning rod, which is far away from the positioning bulge, and the other end of the reset spring is contacted with the fixing rod; a limiting pin penetrates through the positioning rod, and the limiting pin and the reset spring are respectively located on two sides of the fixing rod.

9. The assembly fixture for the rotating shaft and the rotor core according to any one of claims 1 to 4, characterized in that: two guide rods are at least arranged between the bottom plate and the top plate in a penetrating mode, supporting springs located between the bottom plate and the top plate are sleeved on the guide rods, and limiting plates are arranged at the top ends of the guide rods.

10. The assembly fixture for the rotating shaft and the rotor core according to claim 9, characterized in that: the guide rod is sleeved with a ball sliding sleeve penetrating through the top plate, the ball sliding sleeve is in contact with the top end of the supporting spring, and a step seam allowance in contact with the bottom wall of the top plate is arranged on the outer side wall of the ball sliding sleeve.