Coil riveting tool for rotor core

Abstract

The utility model discloses a riveting coil tool of a rotor core, which comprises a bottom die and an upper die, the upper die moves up and down to realize press fit and demoulding with the bottom die, the upper end of the bottom die is provided with a rotor positioning seat, the rotor positioning seat is connected with a limiting lantern ring, the circumferential wall of the limiting lantern ring is provided with radial grooves which are uniformly distributed along the circumference, and the radial grooves are connected with the limiting lantern ring. A pressing plate matched with the radial groove in thickness is arranged in the radial groove, the pressing plate moves along the radial groove, an annular limiting ring is arranged at the end, facing the outer side, of the radial groove in a protruding mode, the pressing plate abuts against the limiting ring when moving outwards along the radial groove, and a slope transmission mechanism is arranged between the pressing plate and the upper die. The slope transmission mechanism drives the pressing plate to move towards the center of the bottom die. When the rotor rotates at a high speed, the pressing plate is pressed into the groove of the rotor, so that a copper wire penetrating into the groove can be limited in the groove of the rotor more compactly and reliably, the copper wire cannot be brushed out in the high-speed operation process of the rotor, and the structure is more reasonable and reliable.

Description

Technical Field

[0001] The utility model relates to an assembly tooling for an engine rotor, in particular to a riveting coil tooling for a rotor core. Background Art

[0002] The rotor structure of an engine includes a rotating shaft, a core, and a copper wire winding. The core is stacked by silicon steel sheets. The rotor core is provided with circumferentially uniformly distributed grooves. The copper wires in the copper wire winding pass through these grooves. Generally, the copper wire winding is wound manually, and three or four copper wires will pass through the grooves of the rotor. Due to the rigidity of the copper wires themselves, the copper wires in the grooves are not arranged tightly enough. Moreover, the openings of the rotor grooves are relatively narrow, and it is difficult for workers to hit the copper wires in the grooves accurately during the process of knocking the copper wires in the grooves. The loose copper wires in the grooves are likely to break away from the rotor grooves during the high-speed rotation of the rotor, causing structural damage and failure of the motor. Content of the Utility Model

[0003] To solve the above problems, the purpose of the utility model is to provide a riveting coil tooling for a rotor core that presses the copper wires tightly in the rotor grooves, so as to tightly and reliably limit the copper wires in the rotor grooves.

[0004] To achieve the above purpose, the utility model provides the following technical solution: A riveting coil tooling for a rotor core includes a bottom die and an upper die. The upper die moves up and down to realize pressing and demoulding with the bottom die. A rotor positioning seat is arranged at the upper end of the bottom die, and a limiting collar is connected to the rotor positioning seat. The circumferential wall of the limiting collar is provided with circumferentially uniformly distributed radial grooves. Pressing plates with thicknesses adapted thereto are arranged in the radial grooves. The pressing plates move along the radial grooves. An annular limiting ring protrudes at the end of the radial groove facing the outside. When the pressing plates move outwards along the radial grooves, they abut against the limiting ring. An inclined plane transmission mechanism is arranged between the pressing plates and the upper die. During the process of pressing the upper die and the bottom die together, the pressing plates are driven to move towards the center position of the bottom die through the inclined plane transmission mechanism.

[0005] The inclined plane transmission mechanism includes a force-bearing side wall formed by exposing one side wall of the pressing plate facing outwards. The force-bearing side wall is inclined. The circumferential wall of the cavity of the upper die is conical. The inclination of the conical circumferential wall of the cavity of the upper die is consistent with the inclination of the force-bearing side wall. When the pressing plate contacts the limiting ring, the force-bearing side wall is located on the downward movement path of the circumferential wall of the cavity of the upper die.

[0006] A rotating shaft insertion hole is arranged on the rotor positioning seat. The upper die is provided with a positioning groove at the end of the rotor. After the bottom die and the upper die are pressed together, a rotor positioning groove is formed between the positioning groove and the positioning seat.

[0007] The beneficial effects of the present utility model are as follows: After the rotor with the wound copper wire is positioned on the bottom die, the upper die presses down and is pressed together with the bottom die. During the pressing process, the upper die drives the pressing plate to move towards the center position of the bottom die through the inclined plane transmission mechanism. The pressing plate will press into the groove of the rotor, so that the copper wire inserted into the groove can be more compactly and reliably restricted in the rotor groove, ensuring that the copper wire will not be brushed out during the high-speed operation of the rotor, and the structure is more reasonable and reliable.

[0008] The following further describes the present utility model in conjunction with the accompanying drawings and specific embodiments. Description of the Drawings

[0009] Figure 1 It is a usage state diagram of the specific embodiment of the present utility model;

[0010] Figure 2 It is an exploded view of the specific embodiment of the present utility model. Specific Embodiment

[0011] The following specifically describes the present utility model through examples, which are only used to further illustrate the present utility model and cannot be understood as a limitation on the protection scope of the present utility model.

[0012] As Figure 1 、 Figure 2 shown, this embodiment discloses a riveting coil tooling for a rotor core, including a bottom die 1 and an upper die 2. The upper die 2 moves up and down to achieve pressing together and demoulding with the bottom die 1. A rotor positioning seat 3 is provided at the upper end of the bottom die 1, and the rotor is placed on the rotor positioning seat 3. A limiting collar 4 is connected to the rotor positioning seat 3. Radial grooves 6 are circumferentially and evenly arranged on the peripheral wall of the limiting collar 4. A pressing plate 5 with a thickness adapted thereto is provided in the radial grooves 6. The pressing plate 5 moves along the radial grooves 6. An annular limiting ring 8 is convexly provided at the end of the radial groove 6 facing the outside. When the pressing plate 5 moves outwards along the radial groove 6, it abuts against the limiting ring 8 to prevent the pressing plate from exiting the radial groove. An inclined plane transmission mechanism 7 is provided between the pressing plate 5 and the upper die 2. During the process of the upper die 2 being pressed together with the bottom die 1, the inclined plane transmission mechanism 7 drives the pressing plate 5 to move towards the center position of the bottom die 1 and press into the groove of the rotor. Of course, the number of the pressing plates 5 is the same as the number of the rotors. At the same time, the thickness of the pressing plate 5 is smaller than the opening of the rotor groove, and the thickness of the pressing plate 5 is preferably designed to be just the thickness that can enter and exit the groove opening.

[0013] The inclined plane transmission mechanism 7 includes a force-receiving side wall 51 formed by exposing one side wall of the pressure plate 5 to the outside. The force-receiving side wall 51 is inclined. The peripheral wall 22 of the mold cavity of the upper mold 2 is conical or inclined and open, so that the inner wall of the upper mold cavity 22 is inclined. The inclination of the conical peripheral wall 22 of the upper mold 2 is consistent with the inclination of the force-receiving side wall 51. When the pressure plate 5 contacts the limit ring 8, the force-receiving side wall 51 is located on the downward movement channel of the peripheral wall of the mold cavity of the upper mold 2. Therefore, during the process of the upper mold 2 pressing downward against the bottom mold 1 through the hydraulic cylinder, the peripheral wall of the mold cavity of the upper mold 2 will contact the force-receiving side wall 51 of the pressure plate 5 first, realizing inclined plane transmission. During the process of the upper mold 2 gradually pressing downward, the contact surface between the conical surface of the mold cavity of the upper mold 2 and the force-receiving side wall 51 of the pressure plate 5 gradually increases, causing the pressure plate 5 to move towards the rotor direction, and then extruding the copper wire at the rotor groove into the groove. Since the copper wire has a certain rigidity, after the copper wire is tightly pressed into the groove of the rotor, the rebound is small and basically will not pop out of the groove. After the upper mold and the bottom mold are pressed together, the upper mold will contact the limit ring 8.

[0014] The rotor positioning seat 3 is provided with a rotating shaft insertion hole 31. In this way, the rotating shaft of the rotor can be inserted into the rotating shaft insertion hole 31 to achieve the positioning of the rotor. The upper mold 2 is provided with a positioning groove 21 at the end of the rotor. After the bottom mold 1 and the upper mold 2 are pressed together, a rotor positioning groove 21 is formed between the positioning groove 21 and the positioning seat, thus realizing the positioning of the rotor and ensuring that the rotor will not be damaged during the pressing process of the upper mold 2 and the bottom mold 1.

[0015] Adopting the above technical solution, after the rotor 10 with the copper wire wound is placed on the bottom mold 1 for positioning, at this time the copper wire is in a loose state. The upper mold 2 presses downward and is pressed together with the bottom mold 1. During the pressing process, the upper mold 2 drives the pressure plate 5 to move towards the center position of the bottom mold 1 through the inclined plane transmission mechanism 7. The pressure plate 5 will press into the groove of the rotor and extrude the copper wire, so that the copper wire penetrated into the groove can be more tightly and reliably restricted in the rotor groove, ensuring that the copper wire will not be brushed out during the high-speed operation of the rotor, and the structure is more reasonable and reliable.

[0016] The above shows and describes the basic principles, main features and advantages of the present invention. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, it is intended to include all changes falling within the meaning and scope of the equivalent elements of the claims in the present invention. Any reference numerals in the claims should not be regarded as limiting the claims involved.

[0017] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A riveting coil tool for a rotor core, characterized by: It includes a bottom mold and an upper mold. The upper mold can be lifted and lowered to achieve pressing and demoulding with the bottom mold. A rotor positioning seat is set at the upper end of the bottom mold. A limiting collar is connected to the rotor positioning seat. The circumferential wall of the limiting collar is provided with radial grooves evenly distributed around the circumference. A pressure plate with a thickness matching the radial groove is provided in the radial groove. The pressure plate moves along the radial groove. An annular limiting ring is convexly provided at the end of the radial groove facing outward. When the pressure plate moves outward along the radial groove, it abuts against the limiting ring. An inclined transmission mechanism is provided between the pressure plate and the upper mold. During the pressing process of the upper mold and the bottom mold, the pressure plate is driven to move toward the center position of the bottom mold by the inclined transmission mechanism.

2. The rotor core riveting coil tooling according to claim 1, characterized in that: The inclined transmission mechanism includes a side wall of the pressure plate facing outward, which is exposed to the outside to form a force-bearing side wall. The force-bearing side wall is arranged at an angle. The cavity peripheral wall of the upper mold is conical. The inclination of the conical upper mold cavity peripheral wall is consistent with the inclination of the force-bearing side wall. When the pressure plate contacts the limit ring, the force-bearing side wall is located on the downward movement channel of the cavity peripheral wall of the upper mold.

3. The rotor core riveting coil tooling according to claim 1, characterized in that: The rotor positioning seat is provided with a rotating shaft jack, and the upper die is provided with a positioning groove for the rotor end. After the bottom die and the upper die are pressed together, a rotor positioning groove is formed between the positioning groove and the positioning seat.

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