CN107968534B - A stator lamination mold with full slot positioning - Google Patents

Abstract

A stator lamination mold with full slot positioning relates to a stator lamination mold. At present, the production of laminated molds results in a large number of repaired and scrapped products, affecting delivery time and costs. The invention includes an expanding sleeve, an expanding core, a positioning key, a limiting plate located below the expanding core, a positioning plate located at the lower periphery of the expanding sleeve, a mold bottom plate, a stator lower pad located above the positioning plate, and a positioning plate located above the expanding sleeve. The stator upper pressure plate on the outer side of the upper part is connected to the power mechanism at the lower end of the expansion core. When the expansion core moves downward, the expansion core pushes the locating keys equal to the number of stator slots to move radially outward to achieve a one-to-one correspondence with the stator slots. Then the expansion core continues to move downward, pushing the expansion sleeve laterally to move radially outward. Alignment with the inner diameter of the stator, through the full-slot positioning and alignment method that corresponds to all stator notches one-to-one, can effectively improve the alignment quality of the stator notches, and solve the problem of jagged stator notches when aligning. Quality issues reduce the number of repairs and scrapped products.

Description

A stator lamination mold with full slot positioning

Technical field

The invention relates to a stator lamination mold, and in particular to a stator lamination mold with full slot positioning.

Background technique

For a long time, the motor stator core has been laminated using a three-piece expansion sleeve. Each expansion sleeve has a positioning key. This kind of lamination tooling is used on low-efficiency motors with shallow stator grooves, wide groove teeth, and thick materials. It can meet its requirements. However, with the rise of high-efficiency motors, especially the mass production of automobile motors, the stator grooves are getting deeper and deeper, the groove teeth are getting finer and thinner, and the materials are getting thinner. The stator core and slots are prone to jagged defects.

Especially today, when labor costs continue to rise and energy prices continue to rise, the use of original laminated molds for production results in a large number of repaired and scrapped products, affecting delivery time and costs.

Contents of the invention

The technical problem to be solved and the technical task proposed by the present invention are to perfect and improve the existing technical solutions and provide a stator lamination mold with full slot positioning, with the purpose of improving the stator lamination quality. To this end, the present invention adopts the following technical solutions.

A stator lamination mold with full slot positioning, including an expansion sleeve, an expansion core, a positioning key, a limit plate located below the expansion core, a positioning plate located on the lower periphery of the expansion sleeve, a mold bottom plate, and a positioning key located above the positioning plate The stator lower pad and the stator upper pressure plate located outside the upper part of the expansion sleeve. The lower end of the expansion core is connected to the power mechanism. The stator punching plate is placed between the stator lower pad and the stator upper pressure plate. The number of positioning keys is the same as the number of stator notches, and the arrangement position of the positioning keys matches the position of the stator notches. The inside of the positioning keys is slidingly connected to the expansion core, and the sliding direction is the taper direction of the expansion core. The positioning keys The outer side of the expansion sleeve passes through the through side port set on the expansion sleeve, and slides with the through side port, and the expansion core is pulled downward through the power mechanism. The expansion core is connected with the taper of the positioning key through sliding connection, pushing the positioning key to pass through the through opening laterally. The side opening is inserted into the stator notches to align the stator notches; the expansion core and the expansion sleeve are conical surfaces with a smaller diameter and a larger diameter. The expansion sleeve can move laterally, and the positioning plate realizes alignment. The movement of the expansion sleeve is limited. The expansion sleeve cooperates with the conical surface of the expansion core and is limited by the positioning plate to move laterally to the outside to align the inner diameter of the stator. When the expansion core moves downward, the expansion core pushes the locating keys equal to the number of stator slots to move radially outward to achieve a one-to-one correspondence with the stator slots. Then the expansion core continues to move downward, pushing the expansion sleeve laterally to move radially outward. Alignment with the inner diameter of the stator, through the full-slot positioning and alignment method that corresponds to all stator notches one-to-one, can effectively improve the alignment quality of the stator notches, and solve the problem of jagged stator notches when aligning. Quality issues reduce the number of repairs and scrapped products.

As a further improvement and supplement to the above technical solution, the present invention also includes the following additional technical features.

The top of the expansion core is provided with a limiting stop, and the inside of the stator lower pad is provided with a positioning stop. When the expansion core moves downward, the limit stop and the positioning stop facilitate the final outward movement limit of the positioning key from the top and bottom.

The sliding fit between the positioning key and the expansion core is achieved through a slide rail groove of a trapezoidal groove, a dovetail groove, or a circular groove. These three groove shapes can prevent the positioning key from lateral detachment.

The cross-section outside the positioning key is triangular, and the side ridges and upper and lower end ridges outside the positioning key all transition into arcs. The outer triangular section and the arc transition processing of the opposite edge lines can easily achieve a smoother guiding effect.

The bottom of the expansion core is provided with a slide rail groove opening. The opening of the slide rail groove facilitates the positioning key to be inserted into the slide rail groove from bottom to top.

The lower end center of the expansion core is provided with a threaded hole interface connected to the power mechanism. The threaded hole interface is easy to process and the connection is stable and reliable.

The expansion sleeve is composed of a plurality of identical sub-sleeve pieces, and each sub-sleeve piece is provided with through-side openings with the same number of corresponding positioning keys. The structure of the multi-piece expansion sleeve is relatively simple, and through side openings with the same number of corresponding positioning keys, the radial movement of each positioning key can be achieved.

There is a step on the outside of the lower end of the expansion sleeve, and a pressure step that matches the step of the expansion sleeve is provided on the inside of the lower part of the positioning plate. The distance between the step of the expansion sleeve and the pressure step of the positioning plate is Sliding fit, when the expansion core moves downward, the expansion sleeve moves radially outward through the guiding function of the positioning key. Through the cooperation of the steps and pressure steps, it is ensured that the expansion sleeve cannot move up and down, and through the guiding function of the positioning keys, it can only move radially.

There is a truncated cone hole with an open top in the middle of the expansion core. The conical surface of the truncated cone hole is equidistant from the outer surface of the expansion core. The upper end of the threaded hole interface is connected through the truncated cone hole. By setting a conical cone hole in the middle of the expanding core, the weight of the expanding core is greatly reduced, the use of materials is reduced, and the material cost is reduced. The threaded hole interface penetrates, making it easier to use bolts with nuts for interface connection. Compared with direct screw connection , the connection is stronger.

The outer sides of the stator lower pad and the stator upper pressure plate are provided with buckle pressure grooves at positions corresponding to the buckle grooves of the stator core. The buckle pressing groove is convenient for placing the buckle to achieve fastening of the buckle during lamination.

Beneficial effects: It can effectively improve the quality of stator slot alignment, reduce the number of repaired and scrapped products, reduce the scrap rate of products, and thereby reduce the average cost of the product. It has a simple structure, low cost, and high working reliability.

Description of the drawings

Figure 1 is a schematic structural diagram of a product with a stator core placed therein according to the present invention.

Figure 2 is a schematic cross-sectional structural diagram of a product with a stator core placed therein according to the present invention.

Figure 3 is a schematic structural diagram of the A-A cross-section in Figure 2 of the present invention.

Figure 4 is a partial enlarged view of B in Figure 3 of the present invention.

Figure 5 is a schematic structural diagram of the expansion sleeve of the present invention.

In the picture: 1-expanding sleeve; 2-expanding core; 3-positioning key; 4-limiting plate; 5-positioning plate; 6-mold bottom plate; 7-stator lower pad; 8-stator upper pressure plate; 9-stator Iron core; 101-step; 102-through side opening; 201-limit stop; 202-threaded hole interface; 203-conical cone hole; 501-pressure step; 701-positioning stop; 901-clip groove.

Detailed ways

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

As shown in Figure 1-4, a stator lamination mold with full slot positioning includes expansion sleeve 1, expansion core 2, positioning key 3, limit plate 4 located below expansion core 2, expansion sleeve 1 The positioning plate 5 on the lower periphery, the mold bottom plate 6, the stator lower pad 7 located above the positioning plate 5, and the stator upper pressure plate 8 located on the upper outer side of the expansion sleeve 1, the lower end of the expansion core 2 is connected to the power mechanism, and the stator lower pad 7 The space between the stator upper pressure plate 8 is used to place the stator punched pieces. The number of positioning keys 3 is the same as the number of stator notches. The arrangement position of positioning keys 3 matches the position of the stator notches. The inside of positioning keys 3 is slidingly connected to the expansion core 2. , the sliding direction is the taper direction of the expansion core 2, the outside of the positioning key 3 passes through the through side port 102 set on the expansion sleeve 1, and slides with the through side port 102, and the power mechanism pulls the expansion core 2 downward, and the expansion core 2. Through the sliding connection with the positioning key 3 in the taper direction, push the positioning key 3 laterally through the side opening 102, and insert it into the stator notch to align the stator notch; the expansion core 2 and the expansion sleeve 1 have a smaller diameter at the bottom and a larger diameter at the top. With the conical surface of the expansion core 2, the expansion sleeve 1 can move laterally, and the positioning plate 5 can limit the movement of the expansion sleeve 1. The expansion sleeve 1 can move laterally to the outside by cooperating with the cone surface of the expansion core 2 and the limitation of the positioning plate 5. Match the inner diameter of the stator.

In order to limit the outward movement, a limiting stop 201 is provided on the top of the expansion core 2, and a positioning stop 701 is provided on the inside of the stator lower pad 7. When the expansion core 2 moves downward, the limit stop 201 and the positioning stop 701 facilitate the final outward movement limit of the positioning key 3 from the top and bottom.

In order to prevent lateral detachment, the sliding fit between the positioning key 3 and the expansion core 2 is achieved through a slide rail groove of a trapezoidal groove, a dovetail groove, or a circular groove. These three groove shapes can prevent the positioning key 3 from escaping laterally.

In order to facilitate guidance, the cross section on the outside of the positioning key 3 is triangular, and the side ridges and upper and lower end ridges on the outside of the positioning key 3 are all transitioned into arcs. The outer triangular section and the arc transition processing of the opposite edge line can easily achieve a smoother guiding effect.

In order to facilitate the installation of the positioning key 3, the bottom of the expansion core 2 is provided with a slide rail groove opening. The opening of the slide rail groove facilitates the positioning key 3 to be inserted into the slide rail groove from bottom to top.

In order to facilitate connection, the center of the lower end of the expansion core 2 is provided with a threaded hole interface 202 connected to the power mechanism. The threaded hole interface 202 is easy to process, easy to connect, and the connection is stable and reliable.

In order to realize the radial movement of the expansion sleeve 1 and the positioning keys 3, the expansion sleeve 1 is composed of multiple identical sub-sleeve pieces, and each sub-sleeve piece is provided with the same number of through-side openings 102 as its corresponding positioning keys 3. The structure of the multi-piece expansion sleeve 1 is relatively simple, and the radial movement of each positioning key 3 can be realized through the same number of through-side openings 102 as its corresponding positioning keys 3.

In order to prevent the vertical movement of the expansion sleeve 1, a step 101 is provided on the outside of the lower end of the expansion sleeve 1, and a pressure step 501 is provided on the inside of the lower part of the positioning plate 5 to press fit with the step 101 of the expansion sleeve 1. The step 101 of the expansion sleeve 1 There is a sliding fit with the pressure step 501 of the positioning plate 5. When the expansion core 2 moves downward, the expansion sleeve 1 moves radially outward through the guiding function of the positioning key 3. Through the cooperation of the step 101 and the pressure step 501, it is ensured that the expansion sleeve 1 cannot move vertically, and through the guiding function of the positioning key 3, it can only move radially.

In order to reduce the weight, a truncated cone hole 203 with an open top is provided in the center of the expanding core 2. The conical surface of the truncated cone hole 203 is equidistant from the outer surface of the expanding core 2. The upper end of the threaded hole interface 202 is connected to the truncated cone hole 203. By arranging the truncated cone hole 203 in the middle of the expansion core 2, the weight of the expansion core 2 is greatly reduced, the use of materials is reduced, and the material cost is reduced. The threaded hole interface 202 penetrates through, making it easy to use bolts with nuts for interface connection. Compared with Compared with direct screw connection, the connection is stronger.

In order to facilitate the installation of buckles, buckle pressure grooves are provided on the outsides of the stator lower pad 7 and the stator upper pressure plate 8 at positions corresponding to the buckle grooves 901 of the stator core 9 . The buckle pressing groove is convenient for placing the buckle to achieve fastening of the buckle during lamination.

When the stator core 9 is stacked, the expansion core 2 is lifted up by the power mechanism, the positioning key 3 and the expansion sleeve 1 shrink, put in the prepared stator punching piece, and put the buckle into the buckle slot 901 of the stator core 9 piece, put the stator upper pressure plate 8 on, the power mechanism pulls down, and the expansion core 2 goes downwards. When the expansion core 2 goes down, the expansion core 2 pushes the positioning key 3 to move radially outward and enters the stator notch to achieve one-to-one geographical alignment of the stator. notch, and then the power mechanism continues to pull down, and the expansion core 2 continues to go down, contacting the conical surface of the expansion sleeve 1, pushing the expansion sleeve 1 laterally to move radially outward, the expansion sleeve 1 expands, and the inner diameter of the stator is tightened to realize the connection with the stator. After the inner diameter is aligned and the buckles are tightened, the power mechanism moves up, the expansion core 2 goes up, the expansion sleeve 1 and the positioning key 3 shrink in sequence, and the stator core 9 can be easily taken out of the tooling. Through the full-slot positioning and alignment method that corresponds to all stator slots one-to-one, the quality of stator slot alignment can be effectively improved, and quality problems such as jagged stator slots that appear when aligning are solved, and repair and maintenance costs are reduced. The number of scrapped products.

In this example, the power mechanism is an oil cylinder.

The stator lamination mold with full slot positioning shown in Figures 1-4 above is a specific embodiment of the present invention. It has reflected the substantive features and progress of the present invention. It can be based on the actual use needs and inspired by the present invention. Under the circumstances, equivalent modifications to its shape, structure, etc. are all within the scope of protection of this plan.

Claims (8)

1. A stator lamination mold with full slot positioning, which is characterized by: including an expansion sleeve (1), an expansion core (2), a positioning key (3), and a limit plate (located below the expansion core (2)). 4), the positioning plate (5) located on the lower periphery of the expansion sleeve (1), the mold bottom plate (6), the stator lower pad (7) located above the positioning plate (5) and the upper part of the expansion sleeve (1) The outer stator upper pressure plate (8), the lower end of the expansion core (2) is connected to the power mechanism, and the space between the stator lower pad (7) and the stator upper pressure plate (8) is used to place the stator punching sheet. The number of positioning keys (3) is the same as the number of stator slots. The arrangement position of the positioning keys (3) matches the position of the stator slots. The inner side of the positioning keys (3) is slidingly connected to the expansion core (2). The direction is the taper direction of the expansion core (2). The outside of the positioning key (3) passes through the through-side port (102) provided on the expansion sleeve (1) and slides with the through-side port (102). The expansion core (2) is pulled downward by the power mechanism. The expansion core (2) is slidingly connected with the positioning key (3) in the taper direction, pushing the positioning key (3) laterally through the side opening (102) and inserted into the stator slot. To realize the alignment of the stator notches; the expansion core (2) and the expansion sleeve (1) are conical surfaces with a smaller diameter and a larger diameter. The expansion sleeve (1) can move laterally, and the positioning plate (5) To limit the movement of the expansion sleeve (1), the expansion sleeve (1) can move laterally to the outside for alignment by cooperating with the conical surface of the expansion core (2) and the positioning plate (5). The inner diameter of the stator, the mold bottom plate (6) is located on the lower side of the positioning plate (5) and the expansion sleeve (1); The expansion sleeve (1) is composed of a plurality of identical sub-sleeve pieces, and each sub-sleeve piece is provided with the same number of through-side openings (102) as its corresponding positioning keys (3); The lower end of the expansion sleeve (1) is provided with a step (101) on the outside, and the lower end of the positioning plate (5) is provided with a pressure step (501) that matches the step (101) of the expansion sleeve (1). ), the step (101) of the expansion sleeve (1) and the pressure step (501) of the positioning plate (5) are slidingly matched. When the expansion core (2) moves downward, the expansion sleeve (1) passes the positioning key The guiding function of (3) realizes radial outward movement. 2. A stator lamination mold with full slot positioning according to claim 1, characterized in that: the top of the expansion core (2) is provided with a limit stop (201), and the stator lower pad The inner side of (7) is provided with a positioning stop (701). 3. A stator lamination mold with full slot positioning according to claim 1, characterized in that: the positioning key (3) and the expansion core (2) are connected by a trapezoidal groove or a dovetail groove or a circular groove. The grooved slide rail groove achieves a sliding fit. 4. A stator lamination mold with full slot positioning according to claim 1, characterized in that: the cross section outside the positioning key (3) is triangular, and the side ridge line outside the positioning key (3) The upper and lower end ridges all have arc transitions. 5. A stator lamination mold with full slot positioning according to claim 3, characterized in that: the bottom of the expansion core (2) is provided with a slide rail groove opening. 6. A stator lamination mold with full slot positioning according to claim 1, characterized in that: the center of the lower end of the expansion core (2) is provided with a threaded hole interface (202) connected to the power mechanism. 7. A stator lamination mold with full slot positioning according to claim 6, characterized in that: a truncated cone hole (203) with a top opening is provided in the middle of the expansion core (2), and the truncated cone hole is The tapered surface of (203) is equidistant from the outer surface of the expansion core (2), and the upper end of the threaded hole interface (202) is connected through the truncated cone hole (203). 8. A stator lamination mold with full slot positioning according to claim 1, characterized in that: the outer sides of the stator lower pad (7) and the stator upper pressure plate (8) are in contact with the stator core (9) ) is provided with a buckle pressing groove at a position corresponding to the buckle groove (901).