CN2214857Y

CN2214857Y - Buffer gear for use in roll die of electric machine

Info

Publication number: CN2214857Y
Application number: CN 95200255
Authority: CN
Inventors: 张渊霖
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-02-28
Filing date: 1995-02-28
Publication date: 1995-12-13
Anticipated expiration: 2005-02-28

Abstract

The utility model provides a buffer gear for the cast die of electric machine rotors, which is arranged between a bottom die holder and a die cavity plate on the just top of the die holder. The buffer gear is composed of longitudinal pricking stay-poles and a plurality of elastic washers, wherein, each pricking stay-pole is inserted between the corresponding cavity of the bottom die holder and the die cavity plate; the elastic washers are strung on each pricking stay-pole; the upper end of each pricking stay-pole is provided with a stressed cap body inserted into each die cavity hole of the die cavity plates; an outward bulged pressing part is transitional to the cap body in radial direction; while the lower end of each pricking stay-pole is movably inserted into each holder hole of the bottom die holder corresponding to each die cavity hole; the elastic washers strung on each pricking stay-pole are movably sheathed on each pricking stay-pole between the pressing part and the upper surface of the bottom die holder in axial direction.

Description

Buffer gear for use in roll die of electric machine

The utility model relates to a kind of buffer unit, particularly a kind of buffer gear that is used for rotor die cast mould.

The prior motor motor rotor die-casting comprises that with mould die cavity plate, combined bed die and the outer mould base of die cavity plate constitute, during moulding, earlier the silicon steel of moulding rotor is put into the hole, cave of die cavity plate,, aluminium liquid is cast in the hole, cave is cast into rotor again with filling again with outer mould base and die cavity plate closing.Because being the form string of folding with the string group, the chief component silicon steel sheet before the rotor moulding is enclosed within on the axis, promptly by designing requirement on axis, go here and there put some silicon steel sheet to reach the needed thickness of folding, but because silicon steel sheet is difficult to obtain the requirement of the complete equal thickness of each sheet on gauge, therefore, the folded dimensional accuracy that falls behind is difficult to consistent with designing requirement, therefore, when closed outer mould base is implemented die casting, the normal appearance produces the cave interporal lacuna inadequately or exceeds the problem that the requirement mould can't tight closure because of folding the drop height degree because of folded drop height degree, the latter causes a large amount of burr occurring after the rotor moulding, both influenced product quality, easily caused the distortion of mould again because of super thick and rigid mold closing, even damage.Also can cause the barycenter imbalance of rotor when especially the compact dimensions error is big, noise is big when making rotor work, rotates not steady.

The purpose of this utility model just is to overcome the above-mentioned shortcoming and defect of existing in prior technology, and a kind of scale error of the string cover that both can remedy the silicon steel sheet in the moulding rotor is provided, can prevent the damage of mould again and improve buffer gear in the rotor die cast mould of rotor Forming Quality.

The purpose of this utility model is to realize by following technical scheme:

Between bed die seat and the die cavity plate directly over it, be provided with buffer gear, buffer gear is to wear strut longitudinally and string is enclosed within each some elastic washer wearing on the strut and constitutes between each hole, corresponding cave of bed die seat and die cavity plate by inserting, the upper end of respectively wearing strut have one with the die cavity plate on the force-bearing cap body that inserts of each die cavity hole, with the cap body mutually transition be the pushing portion of evagination radially, and the lower end of respectively wearing strut all with the corresponding bed die seat in each die cavity hole on each hole activity insert, each wear the plurality of elastic packing ring of the string cover on the strut then movable be set on pushing portion between the upper surface of bed die seat respectively to wear strut axial.In silicon steel sheet that string is put is put in the hole, cave of die cavity plate and closed outer mould base when carrying out die cast, the bottom of silicon steel sheet string can push wears strut the elastic washer string is compressed, and the thickness error of silicon steel sheet string is compensated realizing.

Therefore: remarkable result of the present utility model is:

The 1st: because buffer gear adds, not only can play compensation silicon steel sheet string and put thickness error, improve the purpose of motor rotor die-casting Forming Quality, and can play the elastic buffer effect, can prevent the die cavity plate, the rigid impact of inertia between bed die seat and the silicon steel sheet string is collided with.

The the 2nd: because behind the matched moulds, active force can be delivered to respectively wearing on strut and the elastic washer group of corresponding each buffer gear by the silicon steel sheet string of the independent string cover of each group, make the elastic washer group produce different deflections by the size of transmitting pressure, axially fold gauge gap or the super thickness problem that error causes to reach accurate compensation because of silicon steel sheet, effectively prevented too big and mould compressive deformation problem because of the not tight die casting burr that cause of the super thick matched moulds that causes, simultaneously, also prevented the die casting defect problem that causes in the gap because of having.

Concrete structure of the present utility model is realized by the following examples and accompanying drawing:

Fig. 1 is STRUCTURE DECOMPOSITION figure of the present utility model.

Fig. 2 is the section of structure before the utility model matched moulds.

Section of structure when Fig. 3 is the utility model matched moulds.

Action schematic diagram when Fig. 4 is the utility model matched moulds.

Fig. 5 is the structural perspective of the rotor after the moulding.

Below in conjunction with accompanying drawing 1-5 concrete structure of the present utility model is described in detail:

Between bed die seat 10 and the die cavity plate 20 directly over it, be provided with buffer gear 30, it is characterized in that: buffer gear 30 be by insert support each hole 11 of bed die seat 10 and and each hole 11 one to one between each hole, cave 21 of die cavity plate 20 axial some groups of elastic parts 31 constitute, every group of elastic parts 31 wears strut 311 by one again and the movable sleeve string constitutes at several elastic washers 32 of wearing on the strut 311.Referring to Fig. 1 to Fig. 4

Architectural feature of the present utility model also is:

Each axial line of organizing elastic parts 31 is parallel to each other, the quantity of elastic parts 31 and seat hole 11 and identical with the group number in hole, 11 corresponding cave, seat hole 21, each top of wearing strut 311 all have one with following die cavity plate 20 on the cap body 310 that inserts of hole, corresponding cave 21 activities, what be connected as a single entity with cap body 310 bottoms is the pushing portion 312 of evagination radially, pushing portion 312 bottoms then are polished rod sections that wears with each elastic washer 32 centre bores 320 activity, the lower end activity of respectively wearing strut 311 inserts in the seat hole 11 of the lower bottom die holder 10 corresponding with it, the elastic parts 31 that falls to forming by elastic washer 32 string intussusceptions in pushing portion 312 bottoms to the axial direction part of wearing strut 311 between bed die seat 10 upper surfaces.Referring to Fig. 1 to Fig. 4

Each elastic washer 32 is plate body or the dish-shaped plate body that the spring steel punching out of a curvature injustice becomes, respectively wear strut 311 epimeres pushing portion 312 last week along the aperture that is positioned at following each hole, cave 21 of die cavity plate 20 next week the edge downside, circular cap body 310 activities in each elastic parts 31 are plugged on down and contact in the hole, cave 21 of die cavity plate 20 and with the lower end of the silicon steel sheet string group 40 of folding the moulding rotor that drops on its top or break away from.Referring to Fig. 1 to Fig. 4

Operation principle of the present utility model is summarized as follows:

Each silicon steel sheet string group 40 that respectively will be cast into type is placed on each 21 top, hole, cave of the lower bolster of die cavity plate 20, promptly fall to being placed on the top of cap body 310, again upper mould cave plate and following die cavity plate are fastened the location, and then closed outer mould base 50 and execute clamping pressure P, referring to Fig. 2 to Fig. 4, because mold clamping force P affacts silicon steel sheet string group 40 and wears on the strut 311, so, the cover string can produce the elastic compression distortion by the difference of stressed size at the elastic parts of respectively wearing on the strut 311 31, this elastic compression distortion will be played the effect of compensation silicon steel sheet string group 40 thickness direction scale errors, there is not the gap after can making the mould closure, like this, the rotor of the moulding behind the cast aluminum solution neither can produce burr, also can not produce because of scale error and produce crack, moulding cave on the lower side.Referring to Fig. 4 and Fig. 5

Claims

1, the buffer gear in the rotor die cast mould, between bed die seat (10) and the die cavity plate (20) directly over it, be provided with buffer gear (30), it is characterized in that: buffer gear (30) be by insert support each hole (11) of bed die seat (10) and and each hole (11) one to one between each hole, cave (21) of die cavity plate (20) axial some groups of elastic parts (31) constitute, every group of elastic parts (31) worn strut (311) and movable sleeve string in several elastic washers (32) formation of wearing on the strut (311) by one again.

2, according to the buffer gear in the described electronics motor rotor die-casting of claim 1 mould, it is characterized in that: each axial line of organizing elastic parts (31) is parallel to each other, the quantity of elastic parts (31) and seat hole (11) and identical with the group number in hole, corresponding cave, seat hole (11) (21), each top of wearing strut (311) all have one with following die cavity plate (20) on the cap body (310) that inserts of hole, corresponding cave (21) activity, what be connected as a single entity with cap body (310) bottom is the pushing portion (312) of evagination radially, pushing portion (312) bottom then is a polished rod section that wears with each elastic washer (32) centre bore (320) activity, the lower end activity of respectively wearing strut (311) inserts in the seat hole (11) of the lower bottom die holder (10) corresponding with it, and the elastic parts (31) that is fallen to forming by elastic washer (32) string intussusception is positioned at pushing portion (312) bottom to the axial direction part of wearing strut (311) between bed die seat (10) upper surface.

3, according to the buffer gear in claim 1 or the 2 described rotor die cast moulds, it is characterized in that: each elastic washer (32) is plate body or the dish-shaped plate body that the spring steel punching out of a curvature injustice becomes, respectively wear strut (311) epimere pushing portion (312) last week along the aperture that is positioned at following each hole, cave (21) of die cavity plate (20) next week the edge downside, circular cap body (310) activity in each elastic parts (31) is plugged on down and contacts in the hole, cave (21) of die cavity plate (20) and with the lower end of the silicon steel sheet string group (40) of folding the moulding rotor that drops on its top or break away from.