Rotor magnetic steel groove injection mold

Abstract

The utility model discloses a rotor magnetic steel groove injection mold, and particularly relates to the technical field of injection molds, the rotor magnetic steel groove injection mold comprises a lower mold, an upper mold is arranged at the top end of the lower mold, a bottom plate is arranged at the bottom end of the lower mold through a bolt, a cavity penetrating through the lower mold is formed in the lower mold, and a push rod is arranged in the cavity. The outer end of the push rod is sleeved with a mold core used for lifting an iron core, the bottom end of the push rod extends to the bottom of the bottom plate, a spring is fixedly arranged at the bottom end of the mold core, and a positioning assembly is arranged on the front side of the lower mold and comprises a positioning plate. The bottom end of the push rod is connected with the positioning plate, the positioning plate can synchronously move along with the push rod and the mold core, after the mold core lifts the position of the iron core in place, the position of the positioning plate can be fixed by screwing up the nut on the screw rod, and therefore the positions of the mold core and the iron core are fixed. And the top end of the iron core is prevented from being influenced in the injection molding process to generate gaps.

Description

TECHNICAL FIELD

[0001] The utility model relates to injection mold technical field, concretely relates to a rotor magnetic steel groove injection mold. BACKGROUND

[0002] The permanent magnet rotor is a rotor for a motor, characterized in that a plurality of bosses are provided on the outer side of the rotor core, and a plurality of magnetic tiles are respectively buckled between adjacent two bosses. The permanent magnet rotor is composed of a group of permanent magnets and a core, and its function is to generate a magnetic field and interact with the stator to generate a rotating force.

[0003] In order to fix the magnetic steel more firmly in the magnetic steel groove, the prior art can choose to inject in the magnetic steel groove, and for this purpose, a mold for injection is appeared, such as the rotor magnetic steel groove injection mold with publication number CN214491328U.

[0004] The mold in the prior art completely relies on the elastic force of the spring to push the core upward and make the core tightly contact with the upper mold, but after the core contacts with the upper mold, the position of the core cannot be fixed, and the core is easily affected by the weight of the core and the plastic and moves downward, thus causing the gap between the core and the upper mold again. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a rotor magnetic steel groove injection mold, which fixes the position of the core and the core by fixing the position of the positioning plate, so as to avoid the gap caused by the influence on the top end of the core during the injection process.

[0006] In order to achieve the above-mentioned purpose, the utility model provides the following technical scheme: a rotor magnetic steel groove injection mold, comprising a lower mold, wherein the top end of the lower mold is provided with an upper mold, the bottom end of the lower mold is provided with a bottom plate through bolts, and a cavity penetrating through the lower mold is formed on the lower mold;

[0007] A push rod is arranged inside the cavity, a core for lifting the core is arranged on the outer end of the push rod, the bottom end of the push rod extends to the bottom of the bottom plate, and a spring is fixedly arranged at the bottom end of the core;

[0008] A positioning assembly is arranged on the front side of the lower mold, the positioning assembly comprises a positioning plate, the bottom end of the positioning plate extends to the bottom of the bottom plate and is fixedly connected with the bottom end of the push rod, a sliding groove is formed on the positioning plate, a screw rod is fixedly arranged on the front side of the lower mold, the front end of the screw rod extends to the front side of the positioning plate through the sliding groove and is provided with a nut through threads.

[0009] Further, a contraction cavity communicating with the cavity is formed on the top end of the bottom plate, and the bottom end of the spring is fixedly connected with the inner wall of the contraction cavity;

[0010] A protective sleeve is fixedly arranged on the inner wall of the cavity, and the outer end of the core is in contact with the inner side of the protective sleeve.

[0011] Further, two injection ports for injecting plastic are arranged on the upper die, and a rotor shaft insertion hole is arranged at the top end of the push rod.

[0012] Further, an adjusting block is arranged on the upper die through a sealing bearing, the bottom end of the adjusting block extends into the cavity, and the adjusting block is located between the two injection ports.

[0013] Further, a plurality of positioning protrusions are arranged at the bottom end of the adjusting block and the top end of the core, the positioning protrusions can be clamped into the magnetic steel groove to fix the rotor, and the top end of the adjusting block extends to the top of the upper die and is fixed with an adjusting seat.

[0014] Further, upper protrusions are arranged at the two sides of the upper die, lower protrusions are arranged at the two sides of the lower die, the two upper protrusions are located at the top end of the two lower protrusions, the bottom end of the upper protrusion is fixed with an insertion rod, and the top end of the lower protrusion is provided with an insertion hole, and the insertion rod is inserted into the corresponding insertion hole.

[0015] The bottom end of the bottom plate is provided with a base, two supporting columns are fixed at the top end of the base, and the top end of the two supporting columns is connected to the bottom end of the two lower protrusions.

[0016] In the above technical scheme, the technical effects and advantages of the present application are provided.

[0017] By connecting the positioning plate to the bottom end of the push rod, the positioning plate can move synchronously with the push rod and the core, after the core lifts the position of the iron core into place, the screw cap on the screw rod is tightened, the position of the positioning plate is fixed, thereby fixing the position of the core and the iron core, and avoiding the gap of the top end of the iron core caused by the influence in the injection molding process. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the drawings needed in the embodiments will be briefly introduced below, and obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art according to these drawings.

[0019] Figure 1 It is the overall structure diagram of the present application;

[0020] Figure 2 It is the sectional view of the present application;

[0021] Figure 3 It is the lower die top view structure diagram of the present application;

[0022] Figure 4 It is the lower die bottom view structure diagram of the present application;

[0023] Figure 5 The upper die of the utility model is viewed from the bottom.

[0024] Mark explanation:

[0025] 1, lower die; 2, upper die; 3, bottom plate; 4, base; 5, positioning assembly; 501, positioning plate; 502, sliding groove; 503, screw; 6, adjusting seat; 7, injection port; 8, adjusting block; 9, positioning protrusion; 10, cavity; 11, sheath; 12, core; 13, spring; 14, push rod; 15, rotor shaft insertion hole; 16, shrinkage cavity. DETAILED DESCRIPTION

[0026] In order to make the technical personnel in the field better understand the technical scheme of the utility model, the utility model will be further introduced in detail below with the drawings.

[0027] The utility model provides a kind of rotor magnetic steel slot injection mold as shown in Figures 1-5 The lower die 1 top end is equipped with upper die 2, the lower die 1 bottom end is equipped with bottom plate 3 by bolt, the lower die 1 is equipped with cavity 10 passing through lower die 1 on upper side;

[0028] The push rod 14 outer end is equipped with the core 12 for lifting iron core, and the push rod 14 bottom end extends to the bottom of the bottom plate 3, and the core 12 bottom end is fixedly provided with spring 13.

[0029] The lower die 1 front side is equipped with positioning assembly 5, and the positioning assembly 5 includes positioning plate 501, the positioning plate 501 bottom end extends to the bottom of the bottom plate 3 and is fixedly connected with the push rod 14 bottom end, the positioning plate 501 is equipped with sliding groove 502 on the upper side, the lower die 1 front side is fixedly provided with screw 503, and the screw 503 front end extends to the front side of the positioning plate 501 through the sliding groove 502 and is equipped with nut through thread.

[0030] The bottom plate 3 top end is equipped with shrinkage cavity 16 communicated with cavity 10, and the spring 13 bottom end is fixedly connected with the inner wall of shrinkage cavity 16.

[0031] The inner wall of the cavity 10 is fixedly provided with sheath 11, and the outer end of the core 12 is in contact with the inner side of the sheath 11.

[0032] When starting injection molding, the rotor is placed inside the cavity 10, the bottom end of the rotor core contacts the core 12, then the upper mold 2 is covered on the top end of the lower mold 1, at this time, the spring 13 is compressed, the elastic force of the spring 13 pushes the core 12 and the rotor upwards, so that the top end of the rotor core is in close contact with the part on the upper mold 2, the positioning plate 501 connected to the bottom end of the push rod 14 moves up and down synchronously with the core 12, during the movement, the position of the screw rod 503 inside the sliding groove 502 also changes constantly, when the core 12 lifts the position of the core to the right place, tighten the nut on the screw rod 503, the position of the positioning plate 501 can be fixed, so as to fix the position of the core 12 and the core, avoid the gap of the top end of the core caused by the influence during the injection molding process.

[0033] During the injection molding process, the rotor needs to be clamped and fixed, as shown in Figure 1 、 2 , 5, two injection ports 7 for injecting plastic are provided on the upper mold 2, and a rotor shaft insertion hole 15 is provided at the top end of the push rod 14, after the rotor is placed inside the cavity 10, the shaft of the rotor is inserted into the rotor shaft insertion hole 15.

[0034] The upper mold 2 is provided with an adjusting block 8 through a sealing bearing, the bottom end of the adjusting block 8 extends into the cavity 10, and the adjusting block 8 is located between the two injection ports 7.

[0035] The bottom end of the adjusting block 8 and the top end of the core 12 are both fixedly provided with a plurality of positioning protrusions 9, the positioning protrusions 9 can be clamped into the magnetic steel groove to fix the rotor, and the top end of the adjusting block 8 extends to the top of the upper mold 2 and is fixedly provided with an adjusting seat 6.

[0036] During the process of placing the rotor into the cavity 10, the shaft of the rotor is inserted into the rotor shaft insertion hole 15 downwards, and the magnetic steel groove on the rotor is aligned with the positioning protrusions 9 on the core 12, so that the positioning protrusions 9 on the top end of the core 12 can be clamped into the magnetic steel groove, during the subsequent process of covering the upper mold 2 on the top end of the lower mold 1, the adjusting block 8 is rotated by rotating the adjusting seat 6, the position of the positioning protrusions 9 on the adjusting block 8 is adjusted, so that the positioning protrusions 9 on the bottom end of the adjusting block 8 can also be accurately clamped into the magnetic steel groove, and the bottom end of the adjusting block 8 can be in close contact with the top end of the core, during the subsequent injection molding process, the molten plastic is injected into the cavity 10 through the injection port 7, so as to fill the magnetic steel and the magnetic steel groove, and connect and fix them.

[0037] In order to make the lower mold 1 and the upper mold 2 more stably connected during the injection molding process, as Figure 1 、 3As shown in FIG. 5, the upper die 2 is fixed with upper protrusions on both sides, the lower die 1 is fixed with lower protrusions on both sides, the upper protrusions are located at the top of the lower protrusions, the bottom of the upper protrusion is fixed with a plug rod, and the top of the lower protrusion is provided with a plug hole, the plug rod is inserted into the corresponding plug hole.

[0038] The bottom of the bottom plate 3 is provided with a base 4, the top of the base 4 is fixed with two support columns, and the top of the two support columns is connected to the bottom of the two lower protrusions.

[0039] When the upper die 2 is buckled on the top of the lower die 1, the two upper protrusions are aligned with the two lower protrusions, the two plug rods are aligned with the two plug holes and inserted into the corresponding plug holes, so that the lower die 1 and the upper die 2 are connected more tightly.

[0040] The above only describes some exemplary embodiments of the present application by way of illustration, without doubt, for ordinary skilled in the art, without departing from the spirit and scope of the present application, the described embodiments can be modified in various ways. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the present application.

Claims

1. A rotor magnet slot injection mold, comprising a lower mold (1), the top end of the lower mold (1) is provided with an upper mold (2), the bottom end of the lower mold (1) is provided with a bottom plate (3) through bolts, characterized in that: The lower mold (1) is provided with a cavity (10) penetrating through the lower mold (1); The cavity (10) is internally provided with a push rod (14), the outer end of the push rod (14) is sleeved with a core (12) for lifting the iron core, the bottom end of the push rod (14) extends to the bottom of the bottom plate (3), and the bottom end of the core (12) is fixedly provided with a spring (13); The front side of the lower mold (1) is provided with a positioning assembly (5), the positioning assembly (5) comprises a positioning plate (501), the bottom end of the positioning plate (501) extends to the bottom of the bottom plate (3) and is fixedly connected with the bottom end of the push rod (14), the positioning plate (501) is provided with a sliding groove (502), the front side of the lower mold (1) is fixedly provided with a screw rod (503), the front end of the screw rod (503) extends to the front side of the positioning plate (501) through the sliding groove (502) and is sleeved with a nut through threads.

2. The rotor magnet slot injection mold of claim 1, wherein: The top end of the bottom plate (3) is provided with a contraction cavity (16) communicating with the cavity (10), and the bottom end of the spring (13) is fixedly connected with the inner wall of the contraction cavity (16); The inner wall of the cavity (10) is fixedly provided with a sheath (11), and the outer end of the core (12) is in contact with the inner side of the sheath (11).

3. The rotor magnet slot injection mold of claim 1, wherein: The upper mold (2) is provided with two injection ports (7) for injecting plastic, and the top end of the push rod (14) is provided with a rotor shaft insertion hole (15).

4. The rotor magnet slot injection mold of claim 3, wherein: The upper mold (2) is provided with an adjusting block (8) through a sealing bearing, the bottom end of the adjusting block (8) extends to the inside of the cavity (10), and the adjusting block (8) is located between the two injection ports (7).

5. The rotor magnet slot injection mold of claim 4, wherein: The bottom end of the adjusting block (8) and the top end of the core (12) are fixedly provided with a plurality of positioning protrusions (9), and the top end of the adjusting block (8) extends to the top of the upper mold (2) and is fixedly provided with an adjusting seat (6).

6. The rotor magnet slot injection mold of claim 1, wherein: The upper mold (2) is fixedly provided with upper protrusions on both sides, the lower mold (1) is fixedly provided with lower protrusions on both sides, and the two upper protrusions are located at the top ends of the two lower protrusions, respectively. The bottom plate (3) is provided with a base (4), and the top end of the base (4) is fixedly provided with two supporting columns, and the top ends of the two supporting columns are connected to the bottom ends of the two lower protrusions, respectively.

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