CN205610367U - Electric motor rotor and make its mold core - Google Patents

Abstract

The utility model discloses an electric motor rotor and make its mold core, electric motor rotor includes: rotor body, rotor body has the first shaft hole and a support piece hole of adjacent setting, and the diameter in the first shaft hole of support piece boring ratio is big, support piece, support piece with support piece hole interference fit or transition fit, and be provided with the second shaft hole in the support piece, second shaft hole and primary shaft punch combination become to be used for to alternate complex shaft hole group with the rotor shaft. The utility model discloses the shaft hole that can make the interlude rotor shaft shortens to the mold core that makes the shaping rotor shaft need not set up pattern taper, has avoided the phenomenon of the easy bending deformation of mold core moreover, has guaranteed the manufacturing accuracy in the shaft hole of interlude rotor shaft.

Description

Rotor and manufacture its core rod

Technical field

This utility model relates to a kind of rotor and manufactures its core rod, belongs to technical field of motor manufacture.

Background technology

At present, the hole of traditional rotor axis of electric is the through hole of one-part form, and such through hole needs elongated die mandrel to enter Row injection, as shown in Figure 4, there is following Railway Project in such mould structure:

1, die mandrel is elongated, and the most elongated die mandrel not only self is easily bent deformation, and is molded in rotor Hole is caused mandrel bend to deform by the extruding of solution；Owing to die mandrel is elongated, need to increase withdrawing pattern when of the demoulding oblique Degree, such mesopore will form horn mouth (up-small and down-big mesopore)；Add the deformation of die core axle, cause injection The rotor mesopore bending gone out, when the mandrel of rotor stretches into rotor mesopore, two part quality of fits, production process is uncontrollable, joins Closing gap, have is excessive, and have is too small.

2, die mandrel entirety is thin and tall, the meat wall of the injection molding body being molded by compared with thick meat wall thickness and uneven time injection molding body shrinkage factor big, The mesopore of rotor rotary shaft becomes big, and the matching loose between injection molding body and rotor, the axle of such rotor can produce in mesopore Rock, cause noise big；

3, the rotor mesopore of one-part form, the axle of rotor is big with moulding contact area, and during rotation, abrasion is big, and efficiency is low.

Summary of the invention

Technical problem to be solved in the utility model is the defect overcoming prior art, it is provided that a kind of rotor, its energy The axis hole enough making interspersed armature spindle shortens, so that the core rod of forming rotor axle need not arrange pattern draft, and avoids Core rod is easily bent the phenomenon of deformation, it is ensured that intert the accuracy of manufacture of axis hole of armature spindle.

In order to solve above-mentioned technical problem, the technical solution of the utility model is: a kind of rotor, and it includes:

Rotor body, described rotor body has the first axis hole being disposed adjacent and supports piece bores, and described support piece bores Bigger than the diameter of the first axis hole；

Arrange in support member, described support member and described support piece bores interference fit or interference fits, and described support member There are the second axis hole, described second axis hole and the first axis hole composition for interting the axis hole group coordinated with armature spindle.

Further for the contact area of minimizing armature spindle with rotor, thus reduce abrasion, improve transmission efficiency, join It is combined between one end and the one end of the first axis hole of the support member supported in piece bores and is spaced one section of space, and described sky Between for supporting a part for piece bores so that be interspersed in formed on the outside wall surface of the support member of axis hole group and rotor body described The wall in space has interval.

Further, described support member hole length is the 1/2～2/3 of rotor body length；And/or the length of described support member is The 1/5～1/3 of rotor body length.

Further providing the structure of a kind of concrete support member, described support member has the cooperation coordinated with support piece bores and props up Support part and for carrying out, with electric machine casing, the location supporting part that positions, armature spindle is through coordinating supporting part and location supporting part.

Further, described location supporting part is bigger than the diameter coordinating supporting part.

Further for when reducing rotor rotation, the friction between rotor and electric machine casing, described location supports The end in portion is provided with outwardly boss, and described boss is linear contact lay with contacting of electric machine casing.

Further, described boss is semi-circular shape structure.

Further, described first axis hole and the equal diameters of described second axis hole.

This utility model additionally provides a kind of core rod, and it is used for manufacturing this rotor, and it has for molding the first axis hole The first plug and for the second plug of contoured support piece bores, the first plug and the second plug are disposed adjacent, and institute State the second plug bigger than the diameter of the first plug.

Further, core rod also includes that substrate, one end of described second plug are connected with the first plug, described second plug The other end is connected with described substrate.

After have employed technique scheme, this utility model has a following beneficial effect:

1, the most elongated due to the axis hole of original one-part form, core rod is easily bent deformation, and needs to design pattern draft, Not ensureing the precision of axis hole, the existing axis hole component by support armature spindle is two-part, the respectively first axis hole and the second axle Hole, the first plug and second plug of such core rod are the most comparatively short, are not easy deformation in rotor injection moulding process, and ratio is former The axis hole carrying out one-part form easily manufactures, and need not design pattern draft, and ensure that the precision of axis hole group during the core rod demoulding.

2, the second diameter of mandrel of core rod bottom is bigger than the first plug, and the rotor lower part wall after injection is thin, is difficult to receive Contracting, rotor can preferably coordinate with magnet steel, armature spindle, reduces noise.

3, owing to being provided with one section of space so that the contact area rate armature spindle of armature spindle and axis hole group and the axle of one-part form The contact area in hole is little, weares and teares little, improves transmission efficiency.

Accompanying drawing explanation

Fig. 1 is the structural representation of rotor of the present utility model；

Fig. 2 is the structural representation of core rod of the present utility model；

Fig. 3 is the rotor running efficiency comparison diagram of one-part form axis hole of the present utility model and two-period form axis hole；

Fig. 4 is the structural representation of the core rod of prior art.

Detailed description of the invention

In order to make content of the present utility model be easier to be clearly understood, below according to specific embodiment and combine accompanying drawing, This utility model is described in further detail.

As it is shown in figure 1, a kind of rotor, it includes:

Rotor body 1, described rotor body 1 has the first axis hole 11 being disposed adjacent and supports piece bores 12, and institute The diameter stating support piece bores 12 to the first axis hole 11 is big；

Support member 2, described support member 2 and described support piece bores 12 interference fit or interference fits, and described support member Being provided with the second axis hole 20 in 2, described second axis hole 20 and the first axis hole 11 composition coordinate for interting with armature spindle Axis hole group.Owing to the axis hole of original one-part form is the most elongated, core rod is easily bent deformation, and needs to design pattern draft, Not ensureing the precision of axis hole, the existing axis hole component by support armature spindle is two-part, the respectively first axis hole and the second axle Hole, the first plug and second plug of such core rod are the most comparatively short, are not easy deformation in rotor injection moulding process, and ratio is former The axis hole carrying out one-part form easily manufactures, and need not design pattern draft, and ensure that the precision of axis hole group during the core rod demoulding.

As it is shown in figure 1, coordinate the one end of the support member 2 supported in piece bores 12 and the first axis hole 11 one end it Between be spaced one section of space, and described space be support piece bores 12 a part so that being interspersed in the support of axis hole group The wall forming described space in the outside wall surface of part 2 and rotor body 1 has interval, and described support piece bores 12 length is The 1/2～2/3 of rotor body 1 length；Furthermore it is also possible to limit, the length of described support member 2 is that rotor body 1 is long The 1/5～1/3 of degree.Owing to being provided with one section of space so that armature spindle and the contact area rate armature spindle of axis hole group and one section The contact area of the axis hole of formula is little, weares and teares little, improves transmission efficiency；Illustrate one-part form axis hole and two as shown in Figure 3 The rotor running efficiency comparison diagram of segmentation axis hole；Fig. 3 indicates the two-period form axis hole rotor operating effect than one-part form axis hole Rate significantly improves.

As it is shown in figure 1, described support member 2 have with support the cooperation supporting part 21 that coordinates of piece bores 12 and for motor Housing carries out the location supporting part 22 positioned, and armature spindle is through coordinating supporting part 21 and location supporting part 22.

As it is shown in figure 1, described location supporting part 22 is bigger than the diameter coordinating supporting part 21.

As it is shown in figure 1, the end of described location supporting part 22 is provided with outwardly boss 221, and described boss 221 is linear contact lay with contacting of electric machine casing, and described boss 221 can be semi-circular shape structure, but is not limited to this.

Described first axis hole 11 and the equal diameters of described second axis hole 20.

Illustrating a kind of core rod as shown in Figure 2, it is used for manufacturing described rotor, and it has for molding the first axis hole First plug 31 of 11 and the second plug 32 for contoured support piece bores 12, the first plug 31 and the second plug 32 It is disposed adjacent, and the diameter of described second plug 32 to the first plug 31 is big；It also includes substrate 33, described second One end of plug 32 is connected with the first plug 31, and the other end of described second plug 32 is connected with described substrate 33.

Particular embodiments described above, solves the technical problem that this utility model, technical scheme and beneficial effect are carried out Further describe, be it should be understood that and the foregoing is only specific embodiment of the utility model, not For limiting this utility model, all within spirit of the present utility model and principle, any amendment of being made, equivalent, Improve, within should be included in protection domain of the present utility model.

Claims (10)

1. a rotor, it is characterised in that it includes:

Rotor body (1), described rotor body (1) has the first axis hole (11) being disposed adjacent and supports piece bores (12), And described support piece bores (12) is bigger than the diameter of the first axis hole (11)；

Support member (2), described support member (2) and described support piece bores (12) interference fit or interference fits, and The second axis hole (20), described second axis hole (20) and the first axis hole (11) composition it is provided with in described support member (2) For interting the axis hole group coordinated with armature spindle.

Rotor the most according to claim 1, it is characterised in that: coordinate propping up in supporting piece bores (12) It is spaced one section of space between one end and the one end of the first axis hole (11) of support member (2), and described space is for propping up The part in support member hole (12), so that being interspersed in outside wall surface and the rotor body (1) of the support member (2) of axis hole group The wall in the described space of upper formation has interval.

Rotor the most according to claim 1, it is characterised in that: described support piece bores (12) length is to turn The 1/2～2/3 of sub-body (1) length；And/or the length of described support member (2) is the 1/5～1/3 of rotor body (1) length.

Rotor the most according to claim 1, it is characterised in that: described support member (2) has and support member Cooperation supporting part (21) that hole (12) coordinates and for carrying out, with electric machine casing, the location supporting part (22) that positions, turns Sub-axle is through coordinating supporting part (21) and location supporting part (22).

Rotor the most according to claim 4, it is characterised in that: described location supporting part (22) is than coordinating The diameter of supporting part (21) is big.

6. according to the rotor described in claim 4 or 5, it is characterised in that: described location supporting part (22) End is provided with outwardly boss (221), and described boss (221) is linear contact lay with contacting of electric machine casing.

Rotor the most according to claim 6, it is characterised in that: described boss (221) is semi-circular shape knot Structure.

Rotor the most according to claim 1, it is characterised in that: described first axis hole (11) and described the The equal diameters of two axis holes (20).

9. a core rod, it is characterised in that: it turns for manufacturing the motor as according to any one of claim 1 to 8 Son, it has for first plug (31) of molding the first axis hole (11) and for contoured support piece bores (12) Second plug (32), the first plug (31) and the second plug (32) are disposed adjacent, and described second plug (32) Bigger than the diameter of the first plug (31).

Core rod the most according to claim 9, it is characterised in that: it also includes substrate (33), described second core One end of rod (32) is connected with the first plug (31), the other end of described second plug (32) and described substrate (33) Connect.