Shaftless rotor die-casting end ring die structure

Abstract

The utility model relates to the field of dies, in particular to a shaftless rotor die-casting end ring die structure which comprises a pressing die body, an annular die-casting groove is formed in the pressing die body, and a first exhaust groove set is formed in the bottom face of the annular die-casting groove in the circumferential direction. A second exhaust groove set corresponding to the first exhaust groove set is formed in the side wall of the annular die-casting groove in the circumferential direction. According to the shaftless rotor die-casting end ring die structure, the rotor end face die-casting precision and the machining consistency are improved, the product quality is improved, and meanwhile the die repairing period and the service life of the pressing die body are prolonged.

Description

Technical Field

[0001] The utility model relates to the field of molds, in particular to a die-casting end ring mold structure of a shaftless rotor. Background Art

[0002] The end ring die is a die used in the die casting of shaftless rotors. The die casting die of shaftless rotors can refer to the Chinese utility model patent with application number CN201420000158.4, entitled A Casting Aluminum Die for Motor Rotors. In the traditional end ring die structure, when the rotor is die-cast, the rotor end face and the die body are in plane-to-plane contact, which easily leads to poor exhaust. Poor exhaust leads to unstable contact between the rotor end face and the die body, resulting in reduced die casting accuracy and increased product defect rate. Utility Model Content

[0003] In order to overcome the above-mentioned defects of the prior art, the technical problem to be solved by the utility model is to provide a shaftless rotor die-casting end ring mold structure for improving the die-casting quality of the rotor end face.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is: a shaftless rotor die-casting end ring mold structure, including a die body, the die body is provided with an annular die-casting groove, the bottom surface of the annular die-casting groove is provided with a first exhaust groove group along the circumferential direction, and the side wall of the annular die-casting groove is provided with a second exhaust groove group corresponding to the first exhaust groove group along the circumferential direction.

[0005] Further, the first exhaust groove group includes more than two first grooves arranged along the radial direction of the annular die-casting groove, and the second exhaust groove group includes more than two second grooves arranged along the generatrix of the annular die-casting groove.

[0006] Furthermore, the cross-sectional shapes of the first groove and the second groove are both minor arc shapes.

[0007] Furthermore, the groove depth of the first groove gradually increases from the middle to the edge of the annular die-casting groove.

[0008] Furthermore, the groove width of the first groove gradually increases from the middle to the edge of the annular die-casting groove.

[0009] Furthermore, the bottom surface and the side wall of the annular die-casting groove are both provided with auxiliary connecting grooves, and the auxiliary connecting grooves are used to connect more than two first grooves or more than two second grooves.

[0010] Furthermore, the cross-sectional shape of the auxiliary connecting groove is an isosceles triangle.

[0011] The beneficial effects of the utility model are: providing a shaftless rotor die-casting end ring mold structure, designing an exhaust structure in the annular die-casting groove of the die body, the exhaust structure including a first exhaust groove group arranged on the bottom surface of the annular die-casting groove, and a second exhaust groove group arranged on the side wall of the annular die-casting groove, during the die-casting process, the air on the bottom surface of the annular die-casting groove can move to the side wall of the annular die-casting groove through the first exhaust groove group, and be discharged out of the die-casting groove through the second exhaust groove group, thereby avoiding the problem of unstable contact between the die bodies of the rotor end faces due to poor exhaust, which reduces the die-casting accuracy. The shaftless rotor die-casting end ring mold structure provided by the utility model improves the die-casting accuracy and processing consistency of the rotor end faces, improves product quality, and also prolongs the mold repair cycle and service life of the die body. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 The figure shows a schematic structural diagram of a die-casting end ring die structure of a shaftless rotor according to an embodiment of the utility model;

[0013] Figure 2 Another schematic structural diagram of the die-casting end ring mold structure of the shaftless rotor according to an embodiment of the utility model is shown;

[0014] Figure 3 The figure shows a cross-sectional view of the die-casting end ring mold structure of the shaftless rotor according to an embodiment of the utility model;

[0015] Description of labels:

[0016] 1. Die body; 2. Annular die-casting groove; 3. First exhaust groove group; 31. First groove; 4. Second exhaust groove group; 41. Second groove; 5. Auxiliary connecting groove. DETAILED DESCRIPTION

[0017] In order to explain the technical content, achieved objectives and effects of the present invention in detail, the following is an explanation in conjunction with the implementation modes and the accompanying drawings.

[0018] The utility model provides a shaftless rotor die-casting end ring die structure, which is applied to rotor die-casting molding equipment.

[0019] Please refer to Figures 1 to 3 As shown, the shaftless rotor die-casting end ring mold structure of the utility model includes a die body 1, the die body 1 is provided with an annular die-casting groove 2, the bottom surface of the annular die-casting groove 2 is provided with a first exhaust groove group 3 along the circumferential direction, and the side wall of the annular die-casting groove 2 is provided with a second exhaust groove group 4 corresponding to the first exhaust groove group 3 along the circumferential direction.

[0020] From the above description, it can be seen that the beneficial effects of the utility model are: providing a shaftless rotor die-casting end ring mold structure, designing an exhaust structure in the annular die-casting groove 2 of the die body 1, the exhaust structure includes a first exhaust groove group 3 arranged on the bottom surface of the annular die-casting groove 2, and a second exhaust groove group 4 arranged on the side wall of the annular die-casting groove 2. During the die-casting process, the air on the bottom surface of the annular die-casting groove 2 can move to the side wall of the annular die-casting groove 2 through the first exhaust groove group 3, and be discharged out of the die-casting groove through the second exhaust groove group 4, avoiding the problem of unstable contact between the rotor end face die body 1 due to poor exhaust, which reduces the die-casting accuracy. The shaftless rotor die-casting end ring mold structure provided by the utility model improves the die-casting accuracy and processing consistency of the rotor end face, improves product quality, and also prolongs the mold repair cycle and service life of the die body 1.

[0021] In an optional embodiment, the first exhaust groove group 3 includes two or more first grooves 31 arranged along the radial direction of the annular die-casting groove 2, and the second exhaust groove group 4 includes two or more second grooves 41 arranged along the generatrix of the annular die-casting groove 2.

[0022] It can be seen from the above description that the first groove 31 and the second groove 41 are located corresponding to each other for discharging gas.

[0023] In an optional embodiment, the cross-sectional shapes of the first groove 31 and the second groove 41 are both minor arc shapes.

[0024] From the above description, it can be seen that the shape of the groove is a minor arc shape, which has little effect on the overall structure of the annular die-casting groove 2 and is conducive to ensuring the stability of the mechanical properties of the die body 1.

[0025] In an optional embodiment, the groove depth of the first groove 31 gradually increases from the middle to the edge of the annular die-casting groove 2.

[0026] From the above description, it can be seen that based on the above concept, the groove depth was improved after testing, which is conducive to the rapid discharge of gas.

[0027] In an optional embodiment, the width of the first groove 31 gradually increases from the middle to the edge of the annular die-casting groove 2 .

[0028] From the above description, it can be seen that based on the above concept, the slot width was improved after experiments, which is conducive to the rapid discharge of gas.

[0029] In an optional embodiment, the bottom surface and the side wall of the annular die-casting groove 2 are both provided with auxiliary connecting grooves 5 , and the auxiliary connecting grooves 5 are used to connect more than two first grooves 31 or more than two second grooves 41 .

[0030] It can be seen from the above description that the auxiliary connecting groove 5 is used to connect the grooves to achieve gas diversion, which is conducive to the rapid discharge of gas.

[0031] In an optional embodiment, the cross-sectional shape of the auxiliary connecting groove 5 is an isosceles triangle.

[0032] From the above description, it can be seen that the advantage of the auxiliary connecting groove 5 adopting an isosceles triangle cross section is that the structure is stable, which is beneficial to ensuring the stability of the mechanical properties of the die body 1.

[0033] Please refer to Figures 1 to 3 As shown, embodiment 1 of the utility model is: a shaftless rotor die-casting end ring mold structure, including a die body 1, the die body 1 is provided with an annular die-casting groove 2, the bottom surface of the annular die-casting groove 2 is provided with a first exhaust groove group 3 along the circumferential direction, and the side wall of the annular die-casting groove 2 is provided with a second exhaust groove group 4 corresponding to the first exhaust groove group 3 along the circumferential direction.

[0034] The first exhaust groove group 3 includes more than two first grooves 31 arranged along the radial direction of the annular die-casting groove 2, and the second exhaust groove group 4 includes more than two second grooves 41 arranged along the generatrix of the annular die-casting groove 2. The cross-sectional shapes of the first groove 31 and the second groove 41 are both inferior arc bows. The groove depth of the first groove 31 gradually increases from the middle to the edge of the annular die-casting groove 2. The groove width of the first groove 31 gradually increases from the middle to the edge of the annular die-casting groove 2. The bottom surface and side wall of the annular die-casting groove 2 are both provided with auxiliary connecting grooves 5, and the auxiliary connecting grooves 5 are used to connect more than two first grooves 31 or more than two second grooves 41. The cross-sectional shape of the auxiliary connecting groove 5 is an isosceles triangle.

[0035] In summary, the utility model provides a shaftless rotor die-casting end ring mold structure, in which an exhaust structure is designed in the annular die-casting groove of the die body, and the exhaust structure includes a first exhaust groove group arranged on the bottom surface of the annular die-casting groove, and a second exhaust groove group arranged on the side wall of the annular die-casting groove. During the die-casting process, the air on the bottom surface of the annular die-casting groove can move to the side wall of the annular die-casting groove through the first exhaust groove group, and be discharged out of the die-casting groove through the second exhaust groove group, thereby avoiding the problem of unstable contact between the die body of the rotor end face due to poor exhaust, which reduces the die-casting accuracy. The shaftless rotor die-casting end ring mold structure provided by the utility model improves the die-casting accuracy and processing consistency of the rotor end face, improves product quality, and also prolongs the mold repair cycle and service life of the die body.

[0036] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent transformations made using the contents of the specification and drawings of the present invention, or directly or indirectly applied in the relevant technical field, are also included in the patent protection scope of the present invention.

Claims

1. The die-casting end ring mold structure of the shaftless rotor is characterized by: It comprises a die body, wherein the die body is provided with an annular die casting groove, the bottom surface of the annular die casting groove is provided with a first exhaust groove group along the circumferential direction, and the side wall of the annular die casting groove is provided with a second exhaust groove group corresponding to the first exhaust groove group along the circumferential direction.

2. The shaftless rotor die casting end ring mold structure according to claim 1 is characterized in that: The first exhaust groove group includes more than two first grooves arranged along the radial direction of the annular die-casting groove, and the second exhaust groove group includes more than two second grooves arranged along the generatrix of the annular die-casting groove.

3. The shaftless rotor die casting end ring mold structure according to claim 2 is characterized in that: The cross-sectional shapes of the first groove and the second groove are both minor arc shapes.

4. The shaftless rotor die casting end ring mold structure according to claim 2 is characterized in that: The groove depth of the first groove gradually increases from the middle to the edge of the annular die-casting groove.

5. The die-casting end ring mold structure of the shaftless rotor according to claim 2 is characterized in that: The groove width of the first groove gradually increases from the middle to the edge of the annular die-casting groove.

6. The shaftless rotor die casting end ring mold structure according to claim 2, characterized in that: The bottom surface and the side wall of the annular die-casting groove are both provided with auxiliary connecting grooves, and the auxiliary connecting grooves are used to connect more than two first grooves or more than two second grooves.

7. The shaftless rotor die casting end ring mold structure according to claim 6 is characterized in that: The cross-sectional shape of the auxiliary connecting groove is an isosceles triangle.

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