CN219611461U - Linear motor rotor module - Google Patents

Abstract

The embodiment of the utility model discloses a linear motor rotor module, which comprises an iron core, a winding and a PCB (printed circuit board), wherein the iron core comprises two pressing plates and a plurality of layers of silicon steel sheets, the silicon steel sheets are stacked between the two pressing plates, holes are correspondingly formed in the pressing plates and the silicon steel sheets, and the silicon steel sheets between the two pressing plates are fixed through screws or rivets; the rotor groove is internally provided with insulating paper, and the winding is insulated from the silicon steel sheet through the insulating paper; the PCB is arranged on one side of the iron core; the wire inlet end and the wire outlet end of the winding are arranged on the same side of the PCB and are welded with the PCB respectively. According to the utility model, the silicon steel sheet is pressed by using the screw or the rivet, so that the riveting cost can be effectively reduced; the utility model uses the insulating paper, can increase the paying-off space, increase the number of turns, improve the output; the utility model can reduce the error rate of manual wiring and improve the wiring efficiency by using the PCB; the utility model can improve the production efficiency of the motor and reduce the cost.

Description

Linear motor rotor module

Technical Field

The utility model relates to the technical field of motors, in particular to a linear motor rotor module.

Background

The motor rotor module is composed of an iron core main body and windings, and the iron core main body and the windings are generally formed into an integral structure in an injection molding mode. During injection molding, the iron core main body with the winding is placed in an injection mold, then injection molding materials are filled in a mold cavity, and after the injection molding materials are molded, the rotor module with an integrated structure is taken out.

Most of iron core main bodies of the existing motor rotor modules adopt riveting structures, and the cost of the silicon steel sheet die is high; the iron core main body and the winding are insulated by injection molding insulating glue, the insulating glue is thicker, the paying-off space of the rotor groove is affected, the number of turns of the winding is reduced, and the output of the motor is further reduced.

Disclosure of Invention

The technical problem to be solved by the embodiment of the utility model is to provide the linear motor rotor module so as to reduce the cost and improve the output of the motor.

In order to solve the technical problems, the embodiment of the utility model provides a linear motor rotor module, which comprises an iron core, a winding and a PCB board, wherein a slot is formed on the iron core to form a rotor slot, the winding is embedded in the rotor slot in a coil mode, the iron core comprises two pressing plates and a plurality of layers of silicon steel sheets, the plurality of layers of silicon steel sheets are stacked between the two pressing plates, holes are correspondingly formed in the pressing plates and the silicon steel sheets, and the plurality of layers of silicon steel sheets between the two pressing plates are fixed through screws or rivets; the rotor groove is internally provided with insulating paper, and the winding is insulated from the silicon steel sheet through the insulating paper; the PCB is arranged on one side of the iron core; the wire inlet end and the wire outlet end of the winding are arranged on the same side of the PCB and are welded with the PCB respectively.

Further, the side surface of the PCB is opened, and the wire inlet end and the wire outlet end of the winding are welded to the outer side surface of the PCB from the side surface.

Further, the motor also comprises an injection molding integrated shell, wherein the iron core, the winding and the PCB are arranged in the shell, and the iron core is provided with a positioning strip.

Further, an accessory which is convenient for fixing the linear motor sub-module is arranged on the shell.

Further, the PCB further comprises a wire welded with the PCB, and a wire clip connected with the shell is sleeved on the wire.

Further, the line card is cylindrical, one end is positioned in the shell, and the end penetrating into the shell is provided with an annular groove.

Further, the line card is conical, and the wide end is positioned in the shell; or the line clip is a barbell with thick ends and thin middle.

The beneficial effects of the utility model are as follows: according to the utility model, the silicon steel sheet is pressed by using the screw or the rivet, so that the riveting cost can be effectively reduced; the utility model uses the insulating paper, can increase the paying-off space, increase the number of turns, improve the output; the utility model can reduce the error rate of manual wiring and improve the wiring efficiency by using the PCB; the utility model can improve the production efficiency of the motor and reduce the cost.

Drawings

Fig. 1 is a perspective view of a linear motor sub-module according to embodiment 1 of the present utility model.

Fig. 2 is an internal structural view of a linear motor sub-module according to embodiment 1 of the present utility model at an angle.

Fig. 3 is an internal structural view of another angle of the linear motor sub-module of embodiment 1 of the present utility model.

Fig. 4 is a partial structural view of a linear motor sub-module according to embodiment 1 of the present utility model.

Fig. 5 is a schematic structural diagram of a line card according to embodiment 2 of the present utility model.

Fig. 6 is a schematic structural diagram of a line card in embodiment 3 of the present utility model.

Fig. 7 is a schematic structural diagram of a line card in embodiment 4 of the present utility model.

Description of the reference numerals

The wire clip comprises a silicon steel sheet 1, a pressing plate 2, a screw 3, insulating paper 4, a winding 5, a wire end 6, a PCB 7, a shell 8, accessories 9, a wire 10, a wire clip 11 and a positioning strip 12.

Detailed Description

It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other, and the present utility model will be further described in detail with reference to the drawings and the specific embodiments.

In the embodiment of the present utility model, if there is a directional indication (such as up, down, left, right, front, and rear … …) only for explaining the relative positional relationship, movement condition, etc. between the components in a specific posture (as shown in the drawings), if the specific posture is changed, the directional indication is correspondingly changed.

In addition, the description of "first," "second," etc. in this disclosure is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implying an indication of the number of features being indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature.

Referring to fig. 1 to 7, a linear motor sub-module according to an embodiment of the present utility model includes an iron core, a winding, and a PCB board.

The iron core is grooved to form a rotor groove, and the winding is embedded in the rotor groove in a coil mode.

The iron core is composed of two pressing plates and a plurality of layers of silicon steel sheets. The pressing plate is made of silicon steel material. The multi-layer silicon steel sheets are stacked between the two pressing plates, the pressing plates and the silicon steel sheets are correspondingly provided with holes, the multi-layer silicon steel sheets between the two pressing plates are fixed through screws and nuts, or the multi-layer silicon steel sheets between the two pressing plates are directly fixed through rivets. Compared with the existing riveting fixing mode, the utility model can greatly reduce the cost.

The inner wall of the rotor groove is provided with a layer of insulating paper, and the winding is insulated from the silicon steel sheet through the insulating paper. By using the insulating paper, the paying-off space can be increased, the number of turns can be increased, and the output can be improved.

The PCB board is arranged at one side of the iron core. The wire inlet end and the wire outlet end of the winding are arranged on the same side of the PCB and are welded with the PCB respectively. The error rate of manual wiring can be reduced by using the PCB, and the wiring efficiency is improved. The lead-in and lead-out terminals of the windings are soldered laterally to the outer side of the PCB. The side of the PCB is open, the wire heads of the winding wire inlet end and the wire outlet end are arranged on the side of the PCB, the wire heads are welded to the PCB from the side, and meanwhile, the lower part of a welding spot of the PCB is solid, so that the conduction probability between the winding coil and the PCB can be effectively reduced (if a traditional PCB hole opening mode is adopted, the wire heads penetrate through a PCB hole to be connected with the welding spot, and the conduction risk between the winding coil and the PCB can be caused).

As an implementation mode, the linear motor rotor module further comprises an injection molding integrated shell, wherein the iron core, the winding and the PCB are arranged in the shell, and the iron core is provided with a positioning strip. The linear motor rotor module is placed in the injection mold and needs to be positioned, and the positioning strips (3 strips in fig. 1-4, the specific number of which can be adjusted according to actual needs) at the top of the iron core can be used for positioning, and meanwhile, the exposed area can be reduced by forming the positioning strips into strips, and the area of secondary processing is reduced.

The appearance of the conventional linear motor rotor module is generally fixed through a layer of pouring glue, the whole production process is complex, the time consumption is long, and the production efficiency of the motor rotor module can be effectively improved, the labor participation degree is reduced, and the product yield is improved by adopting an injection molding mode. According to the utility model, the motor rotor module is not cured by using pouring sealant, the pouring fixture is not required to be disassembled and assembled back and forth, the pouring sealant is not required to be mixed, and the time-consuming steps in the motor production are not required.

As an implementation mode, an accessory which is convenient for fixing the linear motor sub-module is arranged on the shell. The accessory is provided with a threaded hole, and can be used for fixing other modules of the linear motor, such as Hall, temperature control and the like.

As an implementation mode, the linear motor rotor module further comprises a wire welded with the PCB, and a wire clip connected with the shell is sleeved on the wire.

The wire clip is made of a temperature-resistant material, and the temperature resistance is higher than 160 ℃. The line card is injection moulding, wraps the wire inside the line card.

As an implementation manner, referring to example 1 of fig. 1 to 4, the line card is cylindrical, one end is located in the housing, and an annular groove is formed at the end penetrating into the housing. The front end width of the line clamp is 1-5mm, and the middle groove is 1-5mm, so that the line clamp can be effectively clamped after the linear motor rotor module is injection molded and is not loosened. The cylinder-shaped line clamp can improve the mobility of plastic injection of the power module during injection molding, and prevent the wire from being crushed during injection molding. Because the embedded pressure that has when moulding plastics, this pressure leads to the phenomenon that the wire part was qualified for the next round of competitions easily, influences the qualification rate of sub-module, uses the line card of moulding plastics can effectively withstand the embedded pressure when moulding plastics, reduces this line and is pressed out the phenomenon.

As an implementation manner, referring to example 2 of fig. 5, the line card is tapered, and the wide end is located in the housing. The injection mold of shell is equipped with corresponding location bell mouth, and the fastener can conveniently block into injection mold's location bell mouth, cooperates with injection mold's location bell mouth. In particular, the line card may also take the tapered and cylindrical shape of embodiment 3, as shown in fig. 6. As an embodiment, referring to example 4 of fig. 7, the line card is a barbell with thick ends and thin middle.

The iron core, the winding, the front end of the wire and the like are integrally molded, so that the qualification rate of the packaging injection molding process is improved, the radial and axial positions of the wire can be limited, and the consistency of the product quality is improved. The part of the conical surface of the line clamp is positioned in the injection mold, and the part of the conical surface of the line clamp also enters the injection molding material, so that the installation firmness of the wire in the winding structure of the linear motor is improved. The reverse taper structure in the injection mold is combined more firmly. The conical surface of the line clamp part is matched with the conical surface of the injection mold, so that the sealing effect of the mold cavity is ensured more easily, and the injection molding yield is higher. The conical surface structure of the line clamp part ensures that the flexibility of the joint between the wire and the conical surface is increased, is beneficial to the bending protection of the wire, and prolongs the service life of the wire.

The preparation method of the linear motor rotor module comprises the steps 1 to 6.

Step 1: the bulk silicon steel sheets are clamped through the pressing plates, and then the silicon steel sheets are fixed through screws or rivets.

Step 2: when the insulating paper is arranged in the rotor groove, the insulating paper can be fixed by double faced adhesive tape.

Step 3: the winding is sleeved into the insulating paper, and the wire inlet ends and the wire outlet ends of all the windings are in one direction.

Step 4: and the wire inlet end and the wire outlet end of the winding are sequentially welded with the PCB, and the PCB is fixed on the winding through the quick-drying adhesive, so that the PCB is ensured not to deviate during injection molding.

Step 5: and (3) injection molding to obtain a wire with a wire clip, and welding the wire to the PCB and the silicon steel sheet (ground wire) to obtain the welded linear motor sub-module. The wire is connected the PCB board before moulding plastics, because the one end of wire is the free end, is welded connection between wire and the PCB board, but wire intensity is lower, when injection molding material fills injection mold, has the phenomenon that the wire flies out under pressure, influences the qualification rate of product, and the ply-yarn drill can perfectly prevent the emergence of this kind of condition.

Step 6: and placing the welded linear motor rotor module into an injection mold corresponding to the shell, performing injection molding, and cooling to obtain a linear motor rotor module finished product with an integrated structure.

In step 6, as an embodiment, the accessory is also mounted on the injection mold.

As an embodiment, in step 4, the ends of the winding wire inlet and outlet are soldered to the PCB from the side of the PCB.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the spirit and scope of the utility model as defined by the appended claims and their equivalents.

Claims (7)

1. The linear motor rotor module comprises an iron core, a winding and a PCB board, wherein a rotor groove is formed in the iron core in a slotting mode, and the winding is embedded in the rotor groove in a coil mode; the rotor groove is internally provided with insulating paper, and the winding is insulated from the silicon steel sheet through the insulating paper; the PCB is arranged on one side of the iron core; the wire inlet end and the wire outlet end of the winding are arranged on the same side of the PCB and are welded with the PCB respectively.

2. The linear motor sub-module of claim 1, wherein the PCB board is open at a side, and the incoming and outgoing terminals of the winding are soldered to the outer side of the PCB board from the open side.

3. The linear motor rotor module of claim 1, further comprising an injection molded housing, wherein the core, windings, and PCB are disposed in the housing, and wherein the core is provided with a positioning strip.

4. A linear motor sub-module as claimed in claim 3, wherein the housing is provided with an attachment for facilitating the fixing of the linear motor sub-module.

5. The linear motor sub-module of claim 3, further comprising a wire soldered to the PCB, wherein the wire is sleeved with a wire clip connected to the housing.

6. The linear motor sub-module as claimed in claim 5, wherein the line clip is cylindrical, one end of the line clip is positioned in the housing, and an annular groove is formed in an end of the line clip which extends into the housing.

7. The linear motor sub-module as claimed in claim 5, wherein the line clip is tapered with a wide end positioned within the housing; or the line clip is a barbell with thick ends and thin middle.