Die-casting die for assembling rotor bearing

Abstract

The utility model relates to the field of motor production, in particular to a die-casting die for assembling a rotor bearing, which comprises a base, a polytetrafluoroethylene gasket and a polytetrafluoroethylene positioning ring, a bearing positioning groove is formed in one end face of the base, the polytetrafluoroethylene gasket is arranged in the bearing positioning groove, and a rotor shaft positioning hole is formed in the bearing positioning groove along the axis; one end face of the base is provided with an arc-shaped fence surrounding the bearing positioning groove, and the polytetrafluoroethylene positioning ring is arranged on the inner edge of the top of the arc-shaped fence. The die-casting die for assembling the rotor and the bearing is high in centering precision, good in supporting and positioning effect, shock-absorbing and wear-resistant, and beneficial to improving the assembling quality of the rotor and the bearing and improving the working performance of a motor.

Description

Technical Field

[0001] The utility model relates to the field of motor production, in particular to a die-casting die for assembling a rotor bearing. Background Art

[0002] The rotor refers to a rotating body supported by bearings, and bearings need to be installed at both ends of the rotor. The rotor includes a rotor assembly and a rotating shaft axially arranged on the rotor assembly. The upper and lower ends of the rotor are fixed with bearings, and the rotor assembly and the rotating shaft rotate as a whole. Its structural reference application number is CN201820220299.5, and its name is a Chinese utility model patent for a bearing and rotor assembly structure. Special molds are required for assembling the rotor and bearings. Traditional molds have poor positioning effects on the rotor and bearings. The rotor is prone to offset and jump during the die-casting assembly process. The coaxiality of the bearing and the rotor shaft cannot be guaranteed, resulting in damage to components and poor assembly quality of the rotor and bearings, which affects the working performance of the motor. 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 die-casting mold for assembling a rotor bearing with improved assembly accuracy.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is as follows: a die-casting mold for assembling a rotor bearing comprises a base, a polytetrafluoroethylene gasket and a polytetrafluoroethylene positioning ring;

[0005] A bearing positioning groove is provided on one end surface of the base, the polytetrafluoroethylene gasket is arranged in the bearing positioning groove, and a rotor shaft positioning hole is provided along the axis of the bearing positioning groove;

[0006] An arc-shaped enclosure is arranged on one end surface of the base around the bearing positioning groove, and the polytetrafluoroethylene positioning ring is arranged on the inner edge of the top of the arc-shaped enclosure.

[0007] Furthermore, the bottom of the bearing positioning groove is conical, and the bottom surface of the polytetrafluoroethylene gasket is a conical surface.

[0008] Furthermore, an inner edge of the top of the arc-shaped enclosure is provided with an annular step groove, and the polytetrafluoroethylene positioning ring is provided with an annular step boss that is clamped with the annular step groove.

[0009] Furthermore, the arc-shaped enclosure includes a fixed enclosure and a detachable enclosure, the fixed enclosure is integrally formed with the base, the fixed enclosure and the detachable enclosure are detachably connected, and the fixed enclosure and the detachable enclosure enclose a rotor positioning cavity.

[0010] Furthermore, the fixed enclosure is provided with an assembly groove in a direction parallel to the axis of the bearing positioning groove, and the detachable enclosure is provided with an assembly boss engaged with the assembly groove.

[0011] Furthermore, there is interference fit between the polytetrafluoroethylene gasket and the bearing positioning groove, and between the polytetrafluoroethylene positioning ring and the arc-shaped enclosure.

[0012] The beneficial effects of the utility model are: providing a die-casting mold for assembling a rotor bearing, a bearing positioning groove is provided on the supporting surface of the base, a rotor shaft positioning hole is provided in the bearing positioning groove, a polytetrafluoroethylene gasket is added in the bearing positioning groove, the polytetrafluoroethylene gasket is used to support and position the bearing, and avoid direct contact between the bearing and the metal base, an arc-shaped enclosure is also provided on the supporting surface of the base, the arc-shaped enclosure is arranged around the rotor product, a polytetrafluoroethylene positioning ring is added to the top inner edge of the arc-shaped enclosure, the polytetrafluoroethylene positioning ring is used to fix the upper part of the rotor, which can not only position the rotor, but also avoid direct contact between the rotor and the metal enclosure. The die-casting mold for assembling a rotor bearing provided by the utility model has high centering accuracy, good supporting and positioning effect, shock absorption and wear resistance, which is beneficial to improving the assembly quality of the rotor and the bearing and improving the working performance of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 The figure is a schematic structural diagram of a die-casting mold for assembling a rotor bearing according to an embodiment of the utility model;

[0014] Figure 2 The figure is a schematic structural diagram of a die-casting mold for assembling a rotor bearing according to an embodiment of the utility model;

[0015] Figure 3 The figure is a schematic structural diagram of a die-casting mold for assembling a rotor bearing according to an embodiment of the utility model;

[0016] Description of labels:

[0017] 1. Base; 11. Bearing locating groove; 12. Rotor shaft locating hole; 13. Arc-shaped enclosure; 131. Fixed enclosure; 132. Removable enclosure; 133. Rotor locating cavity; 14. Annular stepped groove; 2. Polytetrafluoroethylene gasket; 3. Polytetrafluoroethylene locating ring; 31. Annular stepped boss. DETAILED DESCRIPTION

[0018] 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.

[0019] The utility model provides a die-casting die for assembling a rotor bearing, which is applied in the operation of transferring the bearing to the rotor.

[0020] Please refer to Figures 1 to 3 As shown, the die-casting mold for rotor bearing assembly of the utility model includes a base 1, a polytetrafluoroethylene gasket 2 and a polytetrafluoroethylene positioning ring 3;

[0021] A bearing positioning groove 11 is provided on one end surface of the base 1, the polytetrafluoroethylene gasket 2 is arranged in the bearing positioning groove 11, and the bearing positioning groove 11 is provided with a rotor shaft positioning hole 12 along the axis;

[0022] An end surface of the base 1 is provided with an arc-shaped enclosure 13 around the bearing positioning groove 11 , and the polytetrafluoroethylene positioning ring 3 is arranged on the inner edge of the top of the arc-shaped enclosure 13 .

[0023] From the above description, it can be seen that the beneficial effects of the utility model are: providing a die-casting mold for assembling a rotor bearing, a bearing positioning groove 11 is provided on the supporting surface of the base 1, a rotor shaft positioning hole 12 is provided in the bearing positioning groove 11, a polytetrafluoroethylene gasket 2 is added in the bearing positioning groove 11, the polytetrafluoroethylene gasket 2 is used to support and position the bearing to avoid direct contact between the bearing and the metal base 1, an arc-shaped enclosure 13 is also provided on the supporting surface of the base 1, the arc-shaped enclosure 13 is arranged around the rotor product, a polytetrafluoroethylene positioning ring 3 is added to the top inner edge of the arc-shaped enclosure 13, the polytetrafluoroethylene positioning ring 3 is used to fix the upper part of the rotor, which can not only position the rotor, but also avoid direct contact between the rotor and the metal enclosure. The die-casting mold for assembling a rotor bearing provided by the utility model has high centering accuracy, good support and positioning effect, shock absorption and wear resistance, which is beneficial to improving the assembly quality of the rotor and the bearing and improving the working performance of the motor.

[0024] In an optional embodiment, the bottom of the bearing positioning groove 11 is conical, and the bottom surface of the polytetrafluoroethylene gasket 2 is a conical surface.

[0025] From the above description, it can be seen that the matching surface between the polytetrafluoroethylene gasket 2 and the bearing positioning groove 11 is a conical surface, which improves the relative stability between the polytetrafluoroethylene gasket 2 and the bearing positioning groove 11, and is beneficial to enhancing the supporting and positioning effect of the polytetrafluoroethylene gasket 2 on the bearing.

[0026] In an optional embodiment, an inner edge of the top of the arc-shaped enclosure 13 is provided with an annular stepped groove 14 , and the polytetrafluoroethylene positioning ring 3 is provided with an annular stepped boss 31 engaged with the annular stepped groove 14 .

[0027] It can be seen from the above description that the polytetrafluoroethylene positioning ring 3 is positioned by the clamping connection between the annular step groove 14 and the annular step boss 31 to achieve stable supporting cooperation.

[0028] In an optional embodiment, the arc-shaped enclosure 13 includes a fixed enclosure 131 and a detachable enclosure 132 , the fixed enclosure 131 is integrally formed with the base 1 , the fixed enclosure 131 and the detachable enclosure 132 are detachably connected, and the fixed enclosure 131 and the detachable enclosure 132 enclose a rotor positioning cavity 133 .

[0029] From the above description, it can be seen that the fixed enclosure 131 is integrally formed on the base 1, and the function of the detachable enclosure 132 is to facilitate the removal and placement of the rotor and the bearing. The fixed enclosure 131 and the detachable enclosure 132 enclose a rotor positioning cavity 133 for placing the rotor.

[0030] In an optional embodiment, the fixed enclosure 131 is provided with an assembly groove in a direction parallel to the axis of the bearing positioning groove 11 , and the detachable enclosure 132 is provided with an assembly boss engaged with the assembly groove.

[0031] It can be seen from the above description that the detachable enclosure 132 is assembled with the fixed enclosure 131 along the vertical direction, which is convenient for disassembly and assembly.

[0032] In an optional embodiment, there is interference fit between the polytetrafluoroethylene gasket 2 and the bearing positioning groove 11 and between the polytetrafluoroethylene positioning ring 3 and the arc-shaped enclosure 13 .

[0033] The working principle of the utility model is: when in use, first put the polytetrafluoroethylene gasket 2 into the bearing positioning groove 11, then place the lower bearing on the polytetrafluoroethylene gasket 2, then insert the rotor into the base 1, and install the removable enclosure 132 on the fixed enclosure 131, then embed the polytetrafluoroethylene positioning ring 3 on the top of the fixed enclosure 131 and the removable enclosure 132 to position the rotor, finally put the upper bearing on the upper rotor shaft, insert the assembly tube into the rotor shaft and knock it, so that the upper and lower bearings can be assembled to the rotor at the same time.

[0034] Please refer to Figures 1 to 3 As shown, the first embodiment of the utility model is: a die-casting mold for assembling a rotor bearing, comprising a base 1, a polytetrafluoroethylene gasket 2 and a polytetrafluoroethylene positioning ring 3;

[0035] A bearing positioning groove 11 is provided on one end surface of the base 1, the polytetrafluoroethylene gasket 2 is arranged in the bearing positioning groove 11, and the bearing positioning groove 11 is provided with a rotor shaft positioning hole 12 along the axis;

[0036] An end surface of the base 1 is provided with an arc-shaped enclosure 13 around the bearing positioning groove 11 , and the polytetrafluoroethylene positioning ring 3 is arranged on the inner edge of the top of the arc-shaped enclosure 13 .

[0037] The bottom of the bearing positioning groove 11 is conical, and the bottom surface of the polytetrafluoroethylene gasket 2 is a conical surface. The inner edge of the top of the arc-shaped enclosure 13 is provided with an annular stepped groove 14, and the polytetrafluoroethylene positioning ring 3 is provided with an annular stepped boss 31 that is engaged with the annular stepped groove 14. The arc-shaped enclosure 13 includes a fixed enclosure 131 and a detachable enclosure 132. The fixed enclosure 131 is integrally formed with the base 1, and the fixed enclosure 131 and the detachable enclosure 132 are detachably connected. The fixed enclosure 131 and the detachable enclosure 132 enclose a rotor positioning cavity 133. The fixed enclosure 131 is provided with an assembly groove in a direction parallel to the axis of the bearing positioning groove 11, and the detachable enclosure 132 is provided with an assembly boss that is engaged with the assembly groove. The polytetrafluoroethylene gasket 2 and the bearing positioning groove 11, as well as the polytetrafluoroethylene positioning ring 3 and the arc-shaped enclosure 13 are all interference fits.

[0038] To summarize, the utility model provides a die-casting mold for assembling a rotor bearing, a bearing positioning groove is provided on the supporting surface of the base, a rotor shaft positioning hole is provided in the bearing positioning groove, a polytetrafluoroethylene gasket is added in the bearing positioning groove, the polytetrafluoroethylene gasket is used to support and position the bearing, and avoid direct contact between the bearing and the metal base, an arc-shaped enclosure is also provided on the supporting surface of the base, the arc-shaped enclosure is arranged around the rotor product, a polytetrafluoroethylene positioning ring is added to the top inner edge of the arc-shaped enclosure, the polytetrafluoroethylene positioning ring is used to fix the upper part of the rotor, which can not only position the rotor, but also avoid direct contact between the rotor and the metal enclosure. The die-casting mold for assembling a rotor bearing provided by the utility model has high centering accuracy, good supporting and positioning effect, shock absorption and wear resistance, which is beneficial to improving the assembly quality of the rotor and the bearing and improving the working performance of the motor.

[0039] 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. A die-casting mold for assembling a rotor bearing, characterized in that: It includes a base, a polytetrafluoroethylene gasket and a polytetrafluoroethylene positioning ring; a bearing positioning groove is provided on one end face of the base, the polytetrafluoroethylene gasket is arranged in the bearing positioning groove, and a rotor shaft positioning hole is provided along the axis of the bearing positioning groove; an arc-shaped enclosure is provided on one end face of the base around the bearing positioning groove, and the polytetrafluoroethylene positioning ring is arranged on the inner edge of the top of the arc-shaped enclosure.

2. The die-casting mold for assembling a rotor bearing according to claim 1, characterized in that: The bottom of the bearing positioning groove is conical, and the bottom surface of the polytetrafluoroethylene gasket is a conical surface.

3. The die-casting mold for assembling a rotor bearing according to claim 1, characterized in that: An inner edge of the top of the arc-shaped enclosure is provided with an annular step groove, and the polytetrafluoroethylene positioning ring is provided with an annular step boss which is clamped with the annular step groove.

4. The die-casting mold for assembling a rotor bearing according to claim 1, characterized in that: The arc-shaped enclosure includes a fixed enclosure and a detachable enclosure. The fixed enclosure is integrally formed with the base. The fixed enclosure and the detachable enclosure are detachably connected. The fixed enclosure and the detachable enclosure enclose a rotor positioning cavity.

5. The die-casting mold for assembling a rotor bearing according to claim 4, characterized in that: The fixed enclosure is provided with an assembly groove along a direction parallel to the axis of the bearing positioning groove, and the detachable enclosure is provided with an assembly boss engaged with the assembly groove.

6. The die-casting mold for assembling a rotor bearing according to claim 1, characterized in that: There is interference fit between the polytetrafluoroethylene gasket and the bearing locating groove, as well as between the polytetrafluoroethylene locating ring and the arc-shaped enclosure.

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