Retainer pocket back-off demolding structure

Abstract

The invention relates to the technical field of retainer injection molds, and discloses a retainer pocket back-off demolding structure which comprises a jacking seat and a fixing block, an arc-shaped groove is formed in the jacking seat, a plurality of open grooves are evenly distributed in the arc-shaped groove, and the fixing block penetrates through the open grooves from bottom to top and is connected with the jacking seat. The left and right sides of the fixed block are clamped and in sliding fit with the inner sides of the mold core sliding blocks through dovetail blocks; notches are formed in the front side and the rear side, close to the bottom end, of the mold core sliding block, the mold core sliding block is clamped to the edge of the open groove through the notches, the outer side face of the dovetail block is arranged to be inclined faces, the two inclined faces are close to each other from bottom to top, and the top end of the outer side face of the mold core sliding block is arranged to be an arc-shaped face. The jacking seat ascends to drive the mold core sliding blocks on the two sides of each group of fixing blocks to get close to each other in the sliding ascending process along the dovetail blocks, so that the distance between the arc-shaped surfaces of the mold core sliding blocks on the two sides of each group of fixing blocks is reduced; the locking state between the retainer and the mold core sliding block is relieved, and rapid demolding of the retainer can be achieved; the overall structure is simple and installation is convenient.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of retainer injection mold, and particularly relates to a retainer pocket reverse buckle demolding structure. BACKGROUND

[0002] The wind power main shaft bearing is a key load-bearing component of a wind turbine generator, and a retainer thereof is usually integrally cast by high-strength copper alloy or nodular cast iron. With the continuous increase of the power of a single wind turbine, the height and thickness of the retainer also increase. The traditional integral casting process cannot meet the one-time forming requirement due to the problems of difficult molten liquid feeding, thermal stress concentration, and limited size of a mold cavity.

[0003] Although the segmented casting solves the problem that the retainer cannot be formed at one time due to large size, it brings a new technical contradiction. The side surface of a window beam of the wind power retainer needs to be designed as an arc-shaped surface (R surface) which is concave inward, so as to form rolling contact cooperation when a cylindrical roller is installed, and reduce edge stress concentration. The R surface needs to be formed by a corresponding protruding core in the mold, and the core forms a “reverse buckle” structure with the formed retainer segment in the demolding direction. If a whole rigid mold is used, the R surface will hinder the core from exiting, and forced demolding is easy to cause the retainer to be damaged, and even cause the thin-walled window beam to be broken. In addition, the current retainer casting structure is complex, and the parts are difficult to install. SUMMARY

[0004] In view of the defects in the prior art, the purpose of the present application is to provide a retainer pocket reverse buckle demolding structure. The locking state between the retainer and the core sliding block is released by lifting the lifting seat to drive the core sliding block to rise synchronously, and the core sliding blocks on the two sides of the fixed block are close to each other, so that the retainer can be quickly demolded.

[0005] In order to achieve the above purpose, the present application is realized by the following technical scheme: A retainer pocket reverse buckle demolding structure comprises a lifting seat and a fixed block. The lifting seat is provided with an arc-shaped groove, and a plurality of open grooves are uniformly distributed in the arc-shaped groove. The fixed block passes through the open grooves from bottom to top. The left and right sides of the fixed block are connected with the inner sides of the core sliding blocks through dovetail blocks and are in sliding connection. The front and back sides of the core sliding block close to the bottom end are provided with notches, which are connected with the edges of the open grooves. The outer sides of the dovetail blocks are provided with inclined surfaces, which are close to each other from bottom to top. The top end positions of the outer sides of the core sliding blocks are provided with arc-shaped surfaces. The lifting seat drives the core sliding blocks on the two sides of each fixed block to rise along the dovetail blocks, so that the arc-shaped surfaces of the core sliding blocks on the two sides of each fixed block are close to each other, and the distance between the arc-shaped surfaces of the core sliding blocks on the two sides of each fixed block is reduced.

[0006] As a further implementation, the arc-shaped grooves are arranged in groups on the jacking seat, and each open groove is internally provided with a group of fixing blocks and two groups of core sliding blocks.

[0007] As a further implementation, each open groove is provided with a limiting step at the four corners of the bottom surface, the lower end position of the notch is clamped by the limiting step, and the upper end position of the notch abuts against the top surface of the arc-shaped groove.

[0008] As a further implementation, the arc-shaped groove is internally provided with a thimble hole for the thimble to pass from bottom to top, thereby ejecting the retainer from the arc-shaped groove; the thimble hole is arranged on the peripheral side of the open groove.

[0009] As a further implementation, the front and rear sides of the fixing block are in a planar structure, the dovetail blocks protrude from the left and right sides of the fixing block, and the width of the dovetail block is smaller than the width of the left and right sides of the fixing block.

[0010] As a further implementation, the notch is lower than the arc-shaped surface of the core sliding block, the thickness of the core sliding block at the position of the notch is smaller than the thickness of the core sliding block at the position of the arc-shaped surface, and a step is formed on the outside of the core sliding block at the top end position of the notch, which is clamped with the left and right edges of the open groove.

[0011] As a further implementation, the inner side of the core sliding block is provided with a sliding surface, the sliding surface is recessed, and the cross-sectional shape of the sliding surface at the front and rear side positions is adapted to the shape of the dovetail block.

[0012] As a further implementation, the thickness of the core sliding block clamped with the limiting step of the open groove is greater than the distance of the core sliding block being laterally retracted during the lifting process.

[0013] As a further implementation, a flow channel is arranged at the middle position of the jacking seat, and the flow channel communicates with the arc-shaped groove.

[0014] As a further implementation, a guide column is arranged at the bottom of the jacking seat.

[0015] The beneficial effects of the above-mentioned application are as follows: 1. The application achieves the unlocking state between the retainer and the core sliding block by the arrangement of the jacking seat, the fixing block, and the core sliding block, and the synchronous lifting of the core sliding block when the jacking seat is lifted, and the mutual approach and retraction of the core sliding blocks on both sides of the fixing block, thereby achieving the rapid demolding of the retainer.

[0016] 2. The application has a simple structure, and the combination of the jacking seat, the fixing block, and the core sliding block achieves the inverted buckle demolding of the retainer, and is easy to assemble, the core sliding block is clamped at the two end positions of the open groove, then the fixing block passes from bottom to top along the middle position of the open groove, and the dovetail block is matched with the sliding surface, so that the top end of the fixing block is flush with the top end of the core sliding block. BRIEF DESCRIPTION OF DRAWINGS

[0017] The accompanying drawings, which form a part of this specification, are included to provide a further understanding of the application, and are incorporated by reference herein. The embodiments depicted herein are provided by way of example only, and together with the specification serve to explain the application.

[0018] Figure 1 is a schematic view of the inverted-draw structure of the pocket of the retainer in an embodiment of the application; Figure 2 is a sectional view of the inverted-draw structure of the pocket of the retainer in an embodiment of the application; Figure 3 is a schematic view of the structure of the lifting seat in an embodiment of the application; Figure 4 is a schematic view of the bottom structure of the lifting seat in an embodiment of the application; Figure 5 is a schematic view of the fixed block and the core slider in cooperation in an embodiment of the application; Figure 6 is a schematic view of the structure of the core slider in an embodiment of the application; Figure 7 is a schematic view of the structure of the core slider in an embodiment of the application; Figure 8 is a schematic view of the structure of the fixed block in an embodiment of the application; Figure 9 is a schematic view of the structure of the retainer in an embodiment of the application.

[0019] In the drawings: the mutual spacing or dimensions are exaggerated for showing the positions of the parts, and the schematic views are merely illustrative.

[0020] In the drawings: 1. retainer, 2. lifting seat, 3. fixed block, 4. core slider; 11. window beam, 12. arc surface; 21. arc-shaped slot, 22. open slot, 23. flow channel, 24. thimble hole, 25. limiting step; 31. dovetail block, 32. clamping portion, 41. notch, 42. sliding surface, 43. arc surface. DETAILED DESCRIPTION

[0021] It should be noted that the following detailed description is illustrative only, and is intended to provide further description in connection with the application. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

[0022] Example One In a typical embodiment of the application, reference is made to Figure 1As shown, a retaining cage pocket reverse draw structure, including a jacking seat 2 and a fixed block 3, the jacking seat 2 is provided with an arc-shaped groove 21, a plurality of opening grooves 22 are uniformly distributed in the arc-shaped groove 21, the fixed block 3 passes through the opening groove 22 from bottom to top, the left and right sides of the fixed block 3 are connected and slidably fitted with the inner side of the core sliding block 4 through the dovetail block 31; the front and back sides of the core sliding block 4 close to the bottom end position are provided with notches 41, which are connected at the edge position of the opening groove 22 through the notches 41, the outer side of the dovetail block 31 is provided with an inclined surface, the two inclined surfaces are close to each other from bottom to top, the outer side of the core sliding block 4 is provided with an arc-shaped surface at the top end position, and the jacking seat 2 drives the core sliding block 4 on both sides of each fixed block 3 to move upward along the dovetail block 31, so that the arc-shaped surfaces of the core sliding block 4 on both sides of each fixed block 3 are close to each other, and the distance between the arc-shaped surfaces of the core sliding block 4 on both sides of each fixed block 3 is reduced.

[0023] As shown in Figure 9 , due to the large size of the wind power bearing cage, it needs to be cast in sections, the pockets are formed between the window beams 11 and between the window beams 11 and the edge beams, and the side surfaces of the window beams 11 and the edge beams need to be provided with arc surfaces 12 for the installation of rollers. However, the core forms a "reverse draw" structure with the formed cage section in the direction of demolding, if a whole rigid mold is used, the core can only be pulled out linearly along the axis of the cage, the R surface will hinder the core from exiting, and forced demolding is easy to cause damage to the cage, and even cause the thin-walled window beam to break.

[0024] As shown in Figure 3 , a plurality of groups of arc-shaped grooves are arranged on the jacking seat 2, and two groups of arc-shaped grooves 21 are arranged in the embodiment, three groups of opening grooves 22 are uniformly arranged in each arc-shaped groove 21, and one group of fixed blocks and two groups of core sliding blocks are arranged on the inner side of each opening groove.

[0025] It can be understood that the jacking seat 2 is a structure of a male die core, a female die core is arranged above the male die core and can be lifted, the female die core is lowered to be connected with the male die core, so that a closed cavity is formed at the position of the arc-shaped groove of the jacking seat 2, a flow channel is arranged at the middle position of the jacking seat, the flow channel 23 is connected with the arc-shaped groove, and the injection molding of the cage is realized. The flow channel 23 is provided in the prior art.

[0026] As shown in Figure 3 , a plurality of needle holes 24 are arranged in the arc-shaped groove 21, a needle passes through from bottom to top to eject the cage from the arc-shaped groove; a plurality of needle holes 24 are arranged on the side of the opening groove 22, and the needle is a prior art.

[0027] As shown in Figure 3 and Figure 4 , a limiting step 25 is arranged at each corner of the bottom surface of each opening groove, the lower end position of the notch is connected through the limiting step, and the upper end position of the notch is in abutment with the top surface of the arc-shaped groove 21.

[0028] As shown in Figure 8As shown, the front and rear sides of the fixed block are flat structures, and are isosceles trapezoidal, the upper base is smaller than the lower base, the dovetail block 31 protrudes from the left and right sides of the fixed block, and the width of the dovetail block 31 is smaller than the width of the left and right sides of the fixed block 3.

[0029] The outer side of the dovetail block 31 of each fixed block 3 is provided as an inclined surface, and the two inclined surfaces are close to each other from bottom to top. The front and rear sides of the dovetail block 31 form a clamping part 32.

[0030] As shown in Figure 6 and Figure 7 The inner side of the core sliding block 4 is provided with a sliding surface 42, which is recessed in the inner side of the core sliding block 4, and the cross-sectional shape of the front and rear side edges of the sliding surface 42 is adapted to the shape of the dovetail block.

[0031] The upper segment of the outer side of the core sliding block 4 is provided as an arc surface 43 to facilitate the formation of the arc surface 12, and the front and rear side edges of the core sliding block close to the bottom end are provided with notches 41, which are U-shaped, and the two notches are respectively towards the front and rear sides.

[0032] As shown in Figure 7 The notches are lower than the arc surface of the core sliding block, and the thickness of the core sliding block at the notch position is smaller than the thickness of the core sliding block at the arc surface position, so that a step is formed on the outer side of the core sliding block at the top end of the notch, which clamps the left and right edges of the open slot (i.e. the bottom of the arc slot), as shown in Figure 2 When the lifting seat 2 rises, the core sliding block 4 can be pushed upward through the arc slot 21.

[0033] The bottom of the lifting seat is provided with a guide column, and the bottom of the lifting seat is provided with a support seat, which drives the lifting seat 2 to rise and fall through a telescopic structure, and the support seat is provided with a guide hole. During the lifting process of the lifting seat 2, the guide column cooperates with the guide hole to realize the stability of the lifting of the lifting seat 2.

[0034] As shown in Figure 3 The width of the middle position of the open slot 22 is greater than the width of the left and right end positions, and the fixed block is matched in the middle position. Since the core sliding block 4 is matched in the open position at the left and right ends, the lower end of the notch 41 abuts against the ground of the limiting step 25, and the upper end of the notch 41 clamps the bottom of the arc slot. The core sliding block 4 can move up and down with the lifting seat 2 and will not be separated from the lifting seat, and the limiting of the core sliding block 4 is realized through the notch structure.

[0035] The thickness of the core sliding block clamped with the limiting step position of the open slot is greater than the transverse folding distance in the lifting process of the core sliding block, so that the core sliding block 4 will not be separated from the limiting step.

[0036] Specific working principle: The female mold core is lowered and the male mold core is butted, so that a closed cavity is formed at the position of the arc-shaped groove of the jacking seat 2, the runner 23 is communicated with the arc-shaped groove, the retainer is injection molded, and after cooling, the female mold core is raised.

[0037] When the retainer needs to be demolded, the core forms a "counter-drawing" structure with the formed retainer segment in the demolding direction. The jacking seat 2 of the embodiment is raised, and the jacking seat 2 can push the core slider 4 to rise. Since the inner side of the core slider 4 is in sliding fit with the dovetail block 31, the core sliders 4 on the left and right sides of the fixed block 3 approach each other during the rising process, until the distance between the outer arc-shaped surfaces of the two core sliders 4 is less than the minimum opening distance of the pocket hole, the ejector pin pushes the retainer out of the arc-shaped groove position through the ejector pin hole, and then the jacking seat is lowered, driving the core slider 4 to descend and spread to the left and right sides.

[0038] The structure of the embodiment is simple, the counter-drawing demolding of the retainer is realized through the combined structure of the jacking seat, the fixed block and the core slider, and the assembly is convenient. The core slider is first clamped at the position of the opening groove, then the fixed block is inserted from bottom to top along the middle position of the opening groove, and the dovetail block is positioned and matched with the sliding surface, so that the top end of the fixed block 3 is flush with the top end of the core slider.

[0039] The above only describes the preferred embodiments of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A cage pocket undercut demolding structure characterized by, The jacking seat is provided with an arc-shaped groove, and a plurality of open grooves are uniformly distributed in the arc-shaped groove; the fixed block passes through the open groove from bottom to top, and the left and right sides of the fixed block are connected with the inner side of the core slider through dovetail blocks and are in sliding fit; the front and back sides of the core slider close to the bottom end position are provided with notches, which are connected at the edge position of the open groove through the notches, and the outer side of the dovetail block is provided with an inclined surface, the two inclined surfaces are close to each other from bottom to top, and the outer side of the core slider is provided with an arc-shaped surface at the top end position; in the process of the jacking seat rising and driving the core sliders on the left and right sides of each fixed block to slide and rise along the dovetail blocks, the core sliders on the left and right sides of each fixed block are close to each other, so that the distance between the arc-shaped surfaces of the core sliders on the left and right sides of each fixed block is reduced.

2. A cage pocket inverted snap-on demolding structure according to claim 1, characterized in that, A plurality of groups of arc-shaped grooves are arranged on the jacking seat, and each open groove is provided with a group of fixed blocks and two groups of core sliders on the inner side.

3. A cage pocket inverted snap-on demolding structure according to claim 2, characterized in that, Limiting steps are arranged at the four corners of the bottom surface of each open groove, and the lower end position of the notch is connected through the limiting steps, and the upper end position of the notch is in abutment with the top surface of the arc-shaped groove.

4. The cage pocket inverted snap-on demolding structure according to claim 1, characterized in that, A thimble hole is arranged in the arc-shaped groove, and the thimble passes through the thimble hole from bottom to top, and the retainer is ejected from the arc-shaped groove; the thimble hole is arranged on the side of the open groove.

5. A cage pocket inverted snap-on demolding structure according to claim 1, characterized in that, The front and back sides of the fixed block are flat, and the dovetail blocks protrude from the left and right sides of the fixed block, and the width of the dovetail block is less than the width of the left and right sides of the fixed block.

6. A cage pocket inverted snap-on demolding structure according to claim 5, characterized in that, The notch is lower than the arc-shaped surface of the core slider, the thickness of the core slider at the notch position is less than the thickness of the core slider at the arc-shaped surface position, and a step is formed on the outer side of the core slider at the top end position of the notch, which is connected with the left and right edges of the open groove.

7. A cage pocket inverted snap-on demolding structure according to claim 6, characterized in that, The inner side of the core slider is provided with a sliding surface, and the sliding surface is recessed; the cross-sectional shape of the front and back sides of the sliding surface is adapted to the shape of the dovetail block.

8. A cage pocket inverted snap-on demolding structure according to claim 3, characterized in that, The thickness of the core slider connected with the limiting step of the open groove is greater than the transverse folding distance of the core slider in the rising process.

9. A cage pocket inverted snap-on demolding structure according to claim 2, characterized in that, A flow channel is arranged at the middle position of the jacking seat, and the flow channel is connected with the arc-shaped groove.

10. A cage pocket inverted snap-on demolding structure according to claim 1, characterized in that, A guide column is arranged at the bottom of the jacking seat.

Images