CN2214857Y - Buffer Mechanism in Die Casting Mold of Motor Rotor - Google Patents

Abstract

The utility model provides a buffer gear among electric motor rotor die-casting forming die, be provided with buffer gear between die block seat and the die cavity board directly over it, buffer gear is by inserting the fore-and-aft vaulting pole of wearing between each corresponding cave hole of putting at die block seat and die cave board and cluster a plurality of elastic gasket that overlaps on each wearing the vaulting pole constitute, the upper end of each wearing the vaulting pole has one and the atress cap portion of inserting with each die cavity hole on the die cavity board, it is a along radially outside protruding portion of bulldozing to pass with cap body portion, and each lower extreme of wearing the vaulting pole all inserts with each seat hole activity on the die block seat that each die cavity hole corresponds, each is worn a plurality of elastic gasket of cluster cover on the vaulting pole then the activity to wear the vaulting pole axial of wearing between the upper surface of bulldozing portion to die block seat.

Description

The utility model relates to a buffer device, in particular to a buffer mechanism used in a motor rotor die-casting mold.

Existing molding dies for motor rotor die-casting consist of a cavity plate, a bottom mold combined with a cavity plate, and an outer mold base. The outer mold base and the mold cavity plate are closed, and then the aluminum liquid is poured into the cavity to fill the die-cast rotor. Since the silicon steel sheets, the main component of the rotor before forming, are strung on the central shaft in the form of stacking in series, that is, a certain number of silicon steel sheets are placed in series on the central shaft according to the design requirements to achieve the required stacking. thickness, but because it is difficult to obtain the requirement of complete equal thickness of the silicon steel sheets in terms of thickness, the dimensional accuracy after stacking is difficult to be consistent with the design requirements. Insufficient drop height causes gaps between holes or the mold cannot be tightly closed due to the stack height exceeding the requirement. The latter causes a large number of burrs after the rotor is formed, which not only affects product quality, but also easily causes mold failure due to excessive thickness and rigid mold closure. deformed or even damaged. Especially when the molding size error is large, it will also cause the center of mass of the rotor to be unbalanced, so that the motor rotor is noisy and the rotation is not stable.

The purpose of this utility model is to overcome the above-mentioned shortcomings and deficiencies in the prior art, and provide a method that can not only compensate for the size error of the silicon steel sheet string sleeves in the forming rotor, but also prevent the damage of the mold and improve the rotor forming process. Quality motor rotor die-casting buffer mechanism in mold.

The purpose of this utility model is achieved by the following technical solutions:

A buffer mechanism is arranged between the bottom mold base and the mold cavity plate just above it, and the buffer mechanism is inserted between each corresponding hole of the bottom mold base and the mold cavity plate and is inserted in each It is composed of several pieces of elastic washers on the struts. The upper end of each strut has a force-bearing cap body that is inserted into each cavity hole on the cavity plate. The transition to the cap body is a radial The pushing part is protruding, and the lower ends of the struts are inserted into the holes on the bottom mold base corresponding to the holes of the mold holes, and the elastic washers in series on each strut are moved. Each strut rod is axially inserted between the pushing part and the upper surface of the base mold base. When the silicon steel sheets placed in series are placed in the cavity of the mold cavity plate and the outer mold base is closed for die-casting, the lower part of the silicon steel sheet string can be pushed through the strut to compress the elastic washer string, so as to realize the silicon steel The thickness error of the slice string is compensated.

Visible from above: the remarkable effect of the present utility model is:

1st: Due to the addition of the buffer mechanism, it can not only compensate for the thickness error of the silicon steel sheets in series and improve the quality of the rotor die-casting, but also play an elastic buffer role to prevent the mold cavity plate, the bottom mold base and the silicon steel Inertial hard impact bumps between slice strings.

2nd: After the mold is closed, the force can be transmitted to the corresponding struts and elastic washer groups of each buffer mechanism through each group of independent series of silicon steel sheets, so that the elastic washer group can transmit the pressure according to the transmission pressure. Different deformations are produced according to the size of the silicon steel sheet, so as to accurately compensate for the thickness gap or over-thickness problem caused by the axial stacking error of the silicon steel sheet, and effectively prevent the die-casting burr caused by the lax mold clamping caused by the over-thickness. It is too large and the mold is deformed under pressure. At the same time, it also prevents the problem of die-casting defects caused by gaps.

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

Fig. 1 is a structural exploded view of the utility model.

Fig. 2 is a structural sectional view of the utility model before mold closing.

Fig. 3 is a structural sectional view of the utility model when the mold is closed.

Fig. 4 is a schematic diagram of the action of the utility model when the mold is closed.

Fig. 5 is a structural perspective view of the molded rotor.

The concrete structure of the present utility model will be described in detail below in conjunction with accompanying drawing 1-5:

A buffer mechanism 30 is arranged between the bottom mold base 10 and the mold cavity plate 20 directly above it, and it is characterized in that: the buffer mechanism 30 is formed by inserting and supporting each seat hole 11 of the bottom mold base 10 and each seat hole 11 A plurality of sets of elastic assemblies 31 in the axial direction between each cavity 21 of a corresponding mold cavity plate 20 are formed, and each set of elastic assemblies 31 is composed of a strut bar 311 and a plurality of elastic sleeves strung on the strut bar 311 with movable sleeves. Gasket 32 constitutes. See Figures 1 to 4

The utility model is characterized in that:

The axis lines of each group of elastic components 31 are parallel to each other, the number of elastic components 31 is the same as the number of groups of seat holes 11 and holes 21 corresponding to seat holes 11, and each upper part of the strut 311 has a The cap body portion 310 that is movably inserted into the corresponding cavity hole 21 on the die cavity plate 20 is a radially outwardly protruding pushing portion 312 that is integrated with the bottom portion of the cap body portion 310, and the bottom portion of the pushing portion 312 is a The polished rod section that is movably inserted through the central hole 320 of each elastic washer 32, the lower end of each through-the-strut rod 311 is movably inserted into the seat hole 11 of the corresponding lower bottom mold base 10, and is formed by stacking the elastic washer 32 in series The elastic component 31 is located in the axial section of the strut rod 311 between the lower part of the pushing part 312 and the upper surface of the bottom mold base 10 . See Figures 1 to 4

Each elastic washer 32 is a plate body or a dish-shaped plate body punched out of a curved and uneven spring steel, and the upper edge of the pushing part 312 on the upper section of each strut bar 311 is located in each hole 21 of the cavity plate 20 of the lower die. On the lower side of the lower periphery of the orifice, the circular cap body 310 in each elastic component 31 is movably inserted in the cavity 21 of the cavity plate 20 of the lower mold and overlapped with the silicon steel sheet of the forming rotor on the upper part. The lower ends of the strings 40 are in contact or out of contact. See Figures 1 to 4

The working principle of the utility model is briefly described as follows:

Place each silicon steel sheet string group 40 to be die-casted on each cavity 21 top of the lower template of the mold cavity plate 20, that is, drop on the top of the cap body portion 310, and then place the upper mold cavity plate and the lower mold The hole plate is fastened and positioned, and then the outer mold base 50 is closed and the mold clamping pressure P is applied. See Figure 2 to Figure 4. Since the mold clamping force P acts on the silicon steel sheet string group 40 and the piercing rod 311, the sleeve string is The elastic components 31 on each of the struts 311 can produce elastic compression deformation according to the difference in force, and this elastic compression deformation will play a role in compensating the dimensional error of the silicon steel sheet string group 40 in the thickness direction, so that after the mold is closed, There is no gap, so that the molded rotor after casting the aluminum solution will neither produce burrs nor flashes, nor will it produce molding voids due to lower dimensional errors. See Figure 4 and Figure 5

Claims (3)

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.

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