Motor rotor and main shaft connecting structure

Abstract

The utility model discloses a motor rotor and main shaft connecting structure relates to motor technical field, including motor main shaft, motor rotor, straight flute heavy elastic cylindrical pin, transition torque disc of pivot, rotor key, tight connection cover, spacer, limit ring, limit cover, the utility model discloses simple structure, easy to manufacture processing, stable structure, high reliability, convenient installation and removal, easy maintenance, when maintaining, only need to dismantle the damaged parts according to the opposite order, need not to the whole motor to dismantle greatly, greatly reduced maintenance difficulty and maintenance cost, strong applicability, good replaceability, the utility model discloses guarantee the characteristic that easily dismantles while the torque transmission, realized the perfect combination of performance and practicality. It not only solves many problems existing in traditional motor connecting structure, also provides a brand -new train of thought and solution for the design, manufacture, maintenance and maintenance of motor, has wide application prospect and important practical significance.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, specifically to a connection structure between a motor rotor and a main shaft. Background Technology

[0002] With the advancement of science and technology, electric motors, as key devices that convert electrical energy into mechanical energy or vice versa, have been widely used in many fields such as industrial production, transportation, and household appliances. As science and technology continue to progress, the application scenarios for electric motors are becoming increasingly complex and diverse, especially in heavy industry, where motors face more demanding working environments and higher performance requirements.

[0003] In traditional motor design, the connection between the motor rotor and the main shaft typically employs an integrated structure or a more complex fixed connection method. While this design can meet the basic operational requirements of the motor to a certain extent, it also presents several problems. For example, the integrated structure makes it difficult to separate the motor rotor from the main shaft. If one component fails, the entire rotor or main shaft often needs to be replaced, resulting in high maintenance costs and a cumbersome repair process. Furthermore, traditional connection methods require high precision in machining. If machining errors exceed the allowable range, it may lead to problems such as an unstable connection and unstable torque transmission, thereby affecting the motor's operating efficiency and service life.

[0004] In heavy industrial applications, the assembly, installation, maintenance, and repair of motors are particularly challenging. Because motors typically operate under high loads and for extended periods, their wear parts, such as bearings and spindles, require frequent replacement. However, in traditional motor structures, these wear parts are tightly connected to other components, making disassembly and replacement complex. This not only consumes significant time and manpower but also carries the risk of damaging other motor components due to improper handling, further increasing maintenance costs and downtime.

[0005] Therefore, designing a motor rotor-spindle connection structure that can meet the torque transmission requirements of the motor while being safe, reliable, and easy to disassemble has become a pressing technical challenge in the motor industry. This structure needs to reduce maintenance costs and improve maintenance efficiency while ensuring motor performance, and simultaneously adapt to the diverse needs of different application scenarios. Utility Model Content

[0006] The purpose of this utility model is to provide a connection structure between the motor rotor and the main shaft, in order to solve the problems mentioned in the background art, such as the difficulty in separating the motor rotor and the main shaft due to the integrated structure in the traditional motor design, the high precision requirements of the traditional connection method, and the potential for unstable connection and unstable torque transmission if the machining error exceeds the allowable range, which in turn affects the operating efficiency and service life of the motor.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a motor rotor and main shaft connection structure, comprising a motor main shaft and a motor rotor coaxially arranged, wherein one end of the inner wall of the motor rotor is connected to the motor main shaft via a straight groove heavy-duty elastic cylindrical pin and a shaft transition torque disk, the shaft transition torque disk is connected to the motor main shaft via a rotor key, and the other end is directly connected to the motor main shaft via a tensioning connecting sleeve, wherein a spacer is provided on the outside of the tensioning connecting sleeve of the motor rotor, and a limiting ring and a limiting sleeve fixed on the motor main shaft are provided on one end of the spacer.

[0008] Preferably, the motor rotor includes a cylindrical rotor core with a rotor coil passing through it. Rotor copper plates connected to the rotor coil are respectively provided at both ends of the rotor core. A first connecting ring and a second connecting ring extending towards the axis are respectively provided on the inner wall of the rotor core near both ends. The first connecting ring has a plurality of pin holes evenly distributed in a ring, parallel to the axis. A circular clamping ring is fixed to the inner ring of the second connecting ring. A limiting stop ring extending towards the axis is provided on the side of the clamping ring near the first connecting ring. The clamping ring has a plurality of clamping ring screw holes evenly distributed in a ring on the same circumference, parallel to the axis, and is fixed to the spacer with bolts.

[0009] Preferably, the rotating shaft transition torque disc includes an annularly arranged torque disc base with a radially protruding torque disc mounting ring at the middle of its outer side wall. The torque disc mounting ring has a plurality of mounting ring through holes evenly distributed in an annular pattern, coaxial with the pin hole. The straight groove heavy-duty elastic cylindrical pin passes through the mounting ring through holes and the pin hole. The inner wall of the torque disc base has an axially arranged base keyway, which is connected and fixed to the motor main shaft through the rotor key.

[0010] Preferably, the tensioning connecting sleeve includes an inner tensioning sleeve ring fitted on the outside of the motor main shaft, and a radially protruding tensioning sleeve connecting ring provided in the middle of its outer wall. The tensioning sleeve connecting ring has multiple tensioning sleeve through holes on the same circumference. A tensioning ring is provided on each side of the tensioning sleeve connecting ring. The tensioning ring near the limiting stop ring has a tensioning ring threaded hole coaxial with the tensioning sleeve through hole, and the tensioning ring near the spacer has a tensioning ring through hole coaxial with the tensioning sleeve through hole. A bolt is used to pass through the tensioning ring through hole and the tensioning sleeve through hole and connect to the tensioning ring threaded hole. The tensioning ring has a trapezoidal cross-section, with the end near the tensioning sleeve connecting ring being the short side of the trapezoid and the end away from the tensioning sleeve connecting ring being the long side of the trapezoid. An outer tensioning sleeve ring, integrally fixed to the tensioning sleeve connecting ring, is provided on the outside of the tensioning sleeve connecting ring and the two tensioning rings.

[0011] Preferably, the spacer includes a spacer ring sleeved on the outside of the motor main shaft, a spacer connecting ring radially protruding outward on the side of the spacer ring near the tensioning connecting sleeve, a spacer mounting ring extending outward on the side of the spacer connecting ring near the tensioning connecting sleeve, and a plurality of spacer through holes coaxial with the screw holes of the clamping ring evenly distributed in a ring on the spacer mounting ring, and the clamping ring and the spacer are connected as a whole by bolts.

[0012] Preferably, the limiting ring is annularly arranged, including two semi-circular limiting half-rings. The joint of the two limiting half-rings is provided with limiting ring through holes and is connected into a whole by bolts. On the other side opposite to the spacer, the limiting half-rings are provided with a plurality of limiting ring screw holes parallel to the axis, and the limiting sleeve is installed by bolts.

[0013] Preferably, the limiting sleeve includes a circularly arranged limiting sleeve ring, on which a plurality of limiting sleeve through holes coaxial with the screw holes of the limiting ring are evenly distributed in a ring, and the limiting sleeve and the limiting ring are connected as a whole by bolts; the limiting sleeve ring is provided with a limiting sleeve retaining ring on the outer side of the limiting sleeve ring, which is used to prevent the bolts on the limiting ring from falling off.

[0014] Preferably, the motor spindle has a radially concave spindle keyway at a position corresponding to the keyway of the base, and a rotor key is used to simultaneously embed in the keyway of the base and the keyway of the spindle to connect the rotating shaft transition torque disk and the motor spindle into one unit; the motor spindle has a radially concave limiting mounting ring at a position corresponding to the limiting ring, the limiting ring is embedded in the limiting mounting ring, and the installed limiting ring abuts against one end of the spacer.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] 1. This utility model has a simple structure and is easy to manufacture and process; the use of straight groove heavy-duty elastic cylindrical pins can tolerate some hole position errors in mechanical manufacturing, further reducing the requirements for machining accuracy, making the manufacturing process of the entire connection structure more efficient and economical;

[0017] 2. Stable structure and high reliability; all parts are connected together by a tight fixing method, which makes it difficult for them to be displaced or damaged due to failure, thus preventing damage to other parts of the motor.

[0018] 3. Easy to install and disassemble, and easy to maintain and repair; during maintenance, simply disassemble the damaged parts in reverse order, without having to disassemble the entire motor, which greatly reduces the difficulty and cost of maintenance.

[0019] 4. Strong applicability and good substitutability: The motor rotor and main shaft connection structure of this utility model can replace some previous cases where the motor rotor and main shaft were bound together, and has wide applicability. It can meet the motor requirements of different power, different voltage levels and different application scenarios, and is especially suitable for heavy industrial applications;

[0020] 5. The motor rotor-spindle connection structure of this utility model ensures torque transmission while also being easy to disassemble, achieving a perfect combination of performance and practicality. It not only solves many problems existing in traditional motor connection structures but also provides a completely new approach and solution for the design, manufacturing, maintenance, and repair of motors, possessing broad application prospects and significant practical importance. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the present invention;

[0022] Figure 2 for Figure 1 Structural diagram;

[0023] Figure 3 for Figure 2 Enlarged view of A in the middle;

[0024] Figure 4 for Figure 2 Enlarged view of B in the middle;

[0025] Figure 5 for Figure 2 Enlarged view of C;

[0026] In the diagram: Motor spindle-1, spindle keyway-11, limit mounting ring-12, motor rotor-2, rotor core-21, rotor coil-22, rotor copper sheet-23, first connecting ring-24, second connecting ring-25, pin hole-26, clamping ring-27, limit stop ring-28, clamping ring screw hole-29, straight groove heavy-duty elastic cylindrical pin-3, shaft transition torque disc-4, torque disc base-41, torque disc mounting ring-42, mounting ring through hole-43, base keyway-44, rotor key-5, tensioning Connecting sleeve-6, tensioning sleeve inner ring-61, tensioning sleeve connecting ring-62, tensioning sleeve through hole-63, tensioning ring-64, tensioning ring threaded hole-65, tensioning ring through hole-66, tensioning sleeve outer ring-67, spacer-7, spacer ring-71, spacer connecting ring-72, spacer mounting ring-73, spacer through hole-74, limiting ring-8, limiting half ring-81, limiting ring through hole-82, limiting ring threaded hole-83, limiting sleeve-9, limiting sleeve ring-91, limiting sleeve through hole-92, limiting sleeve stop ring-93. Detailed Implementation

[0027] To enable those skilled in the art to better understand the technical solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings and specific embodiments.

[0028] Please refer to Figure 1-5 , Figure 1 This is a schematic diagram of the present invention; Figure 2 for Figure 1 Structural diagram; Figure 3 for Figure 2 Enlarged view of A in the middle; Figure 4 for Figure 2 Enlarged view of B in the middle; Figure 5 for Figure 2 A magnified view of C.

[0029] This utility model provides a motor rotor and main shaft connection structure, including a motor main shaft 1 and a motor rotor 2 coaxially arranged. One end of the inner wall of the motor rotor 2, between the motor rotor 2 and the motor main shaft 1, is connected to a shaft transition torque disk 4 via a straight-grooved heavy-duty elastic cylindrical pin 3. This is used to transmit the torque generated by the motor rotor 2 to the straight-grooved heavy-duty elastic cylindrical pin 3 and then to the shaft transition torque disk 4. The shaft transition torque disk 4 is connected to the motor main shaft 1 via a rotor key 5, used to transmit torque from the shaft transition disk 4 to the main shaft 1 via the rotor key 5. The other end is directly connected to the motor main shaft 1 via a tensioning connecting sleeve 6 to ensure the motor rotor... The tensioning sleeve 6 ensures concentricity between the two ends of the motor spindle 1 and restricts radial displacement between the motor rotor 2 and the motor spindle 1. Simultaneously, the tensioning sleeve 6 also partially transmits the torque of the motor rotor 2 directly to the motor spindle 1. A spacer 7 is provided on the outside of the tensioning sleeve 6 to adjust the spacing between different positions of the motor spindle 1 and prevent the bolts on the tensioning sleeve 6 from falling off. A limiting ring 8 and a limiting sleeve 9, fixed to the motor spindle 1, are provided at one end outside the spacer 7. The limiting ring 8 and the limiting sleeve 9 work together and are fixed to the motor spindle 1 to prevent the tensioning sleeve 6 from failing.

[0030] The motor rotor 2 includes a cylindrical rotor core 21, with a rotor coil 22 passing through it. Rotor copper sheets 23 are respectively provided at both ends of the rotor core 21 for connection to the rotor coil 22. A first connecting ring 24 and a second connecting ring 25 extending towards the shaft are respectively provided on the inner wall of the rotor core 21 near both ends. The first connecting ring 24 has multiple pin holes 26 evenly distributed in a ring, parallel to the shaft center, through which a straight-groove heavy-duty elastic cylindrical pin 3 is used to connect to the shaft transition torque disc 4. A circular clamping ring 27 is fixedly connected to the inner ring of the second connecting ring 25. A limiting stop ring 28 extending towards the shaft center is provided on the side of the clamping ring 27 near the first connecting ring 24. Multiple clamping ring screw holes 29, parallel to the shaft centerline, are evenly distributed in a ring on the same circumference of the clamping ring 27, and are fixed to the spacer 7 using bolts.

[0031] The straight-groove heavy-duty elastic cylindrical pin 3 has a certain degree of elasticity, which can tolerate the hole position deviation caused by machining, and also plays a role in mitigating the torque impact generated by the motor rotor 2 when the motor starts.

[0032] The rotating shaft transition torque disk 4 includes a ring-shaped torque disk base 41. A radially protruding torque disk mounting ring 42 is provided at the middle of the outer side wall of the torque disk base 41. The torque disk mounting ring 42 is provided with a plurality of mounting ring through holes 43 coaxial with the pin hole 26. The motor rotor 2 and the rotating shaft transition torque disk 4 are connected as one unit by the straight groove heavy-duty elastic cylindrical pin 3 passing through the mounting ring through holes 43 and the pin hole 26. The inner wall of the torque disk base 41 is provided with an axially arranged base keyway 44, which is connected and fixed to the motor main shaft 1 by the rotor key 5.

[0033] The tensioning connecting sleeve 6 includes a tensioning inner ring 61 sleeved on the outside of the motor main shaft 1. A radially protruding tensioning connecting ring 62 is provided at the middle of the outer wall of the inner ring 61. Multiple tensioning through holes 63 are provided on the same circumference of the tensioning connecting ring 62. Simultaneously, a tensioning ring 64 is provided on each side of the tensioning connecting ring 62. The tensioning ring 64 near the limiting stop ring 28 is provided with a tensioning ring threaded hole 65 coaxial with the tensioning through hole 63, and a tensioning ring threaded hole 65 near the spacer 7. The ring 64 is provided with a tension ring through hole 66 coaxial with the tension sleeve through hole 63. A bolt is used to pass through the tension ring through hole 66 and the tension sleeve through hole 63 and connect to the tension ring threaded hole 65. The cross-section of the tension ring 64 is a trapezoidal cross-section, with the end near the tension sleeve connecting ring 62 being the short side of the trapezoid and the end away from the tension sleeve connecting ring 62 being the long side of the trapezoid. An outer tension sleeve ring 67 is provided on the outside of the tension sleeve connecting ring 62 and the two tension rings 64 and is fixedly connected to the tension sleeve connecting ring 62 as a whole.

[0034] The spacer 7 includes a spacer ring 71 sleeved on the outside of the motor main shaft 1. The spacer ring 71 has a spacer connecting ring 72 radially protruding outward on the side near the tensioning connecting sleeve 6. The spacer connecting ring 72 has a spacer mounting ring 73 extending outward on the side near the tensioning connecting sleeve 6. The spacer mounting ring 73 has a plurality of spacer through holes 74 evenly distributed in a ring and coaxial with the compression ring screw hole 29. The compression ring 27 and the spacer 7 are connected as a whole by bolts.

[0035] The limiting ring 8 is circularly arranged, including two semi-circular limiting half-rings 81. The joint of the two limiting half-rings 81 is provided with limiting ring through holes 82, and they are connected into one piece by bolts. On the other side opposite to the spacer 7, the limiting half-ring 81 is provided with a plurality of limiting ring screw holes 83 parallel to the axis, and the limiting sleeve 9 is installed by bolts.

[0036] The limiting sleeve 9 includes a circular limiting sleeve ring 91, on which a plurality of limiting sleeve through holes 92 coaxial with the limiting ring screw holes 83 are evenly distributed in a ring. The limiting sleeve 9 is connected to the limiting ring 8 as a whole by bolts. The limiting sleeve ring 91 has a limiting sleeve retaining ring 93 on its outer side, which is fitted on the outside of the limiting ring 8 to prevent the bolts on the limiting ring 8 from falling off.

[0037] The motor spindle 1 has a radially concave spindle keyway 11 at a position corresponding to the keyway 44 of the base, and the rotor key 5 is simultaneously embedded in the keyway 44 of the base and the keyway 11 to connect the shaft transition torque disk 4 and the motor spindle 1 into one unit; the motor spindle 1 has a radially concave limiting mounting ring 12 at a position corresponding to the limiting ring 8, and the limiting ring 8 is embedded in the limiting mounting ring 12, and the installed limiting ring 8 abuts against one end of the spacer 7.

[0038] Although embodiments of the present invention have been shown and described, it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, it will be understood by those skilled in the art that all other embodiments obtained by making various changes, modifications, substitutions and alterations to these embodiments without departing from the principles and spirit of the present invention and without creative effort are within the scope of protection of the present invention.

Claims

1. A motor rotor and spindle connection structure, characterized by: The device includes a motor spindle (1) and a motor rotor (2) arranged coaxially. One end of the inner wall of the motor rotor (2) is connected to the motor spindle (1) via a straight groove heavy-duty elastic cylindrical pin (3) and a shaft transition torque disk (4). The shaft transition torque disk (4) is connected to the motor spindle (1) via a rotor key (5), and the other end is directly connected to the motor spindle (1) via a tensioning connecting sleeve (6). The motor rotor (2) is provided with a spacer (7) on the outside of the tensioning connecting sleeve (6). A limiting ring (8) and a limiting sleeve (9) fixed on the motor spindle (1) are provided at one end of the spacer (7).

2. The motor rotor and spindle connection structure of claim 1, wherein: The motor rotor (2) includes a cylindrical rotor core (21) with a rotor coil (22) inside it. The rotor core (21) has rotor copper plates (23) connected to the rotor coil (22) at both ends. The inner wall of the rotor core (21) has a first connecting ring (24) and a second connecting ring (25) extending towards the axis near both ends. The first connecting ring (24) has a plurality of pin holes (26) parallel to the axis evenly distributed in a ring. The inner ring of the second connecting ring (25) is fixed with a ring-shaped clamping ring (27). The clamping ring (27) has a limiting stop ring (28) extending towards the axis on the side near the first connecting ring (24). The clamping ring (27) has a plurality of clamping ring screw holes (29) parallel to the axis evenly distributed in a ring on the same circumference and is fixed to the spacer (7) with bolts.

3. The motor rotor and main shaft connection structure according to claim 2, characterized in that: The rotating shaft transition torque disk (4) includes a torque disk base (41) arranged in an annular shape and a radially protruding torque disk mounting ring (42) arranged in the middle of its outer side wall. The torque disk mounting ring (42) is provided with a plurality of mounting ring through holes (43) coaxial with the pin hole (26) evenly distributed in an annular shape. The straight groove heavy-duty elastic cylindrical pin (3) passes through the mounting ring through hole (43) and the pin hole (26). The inner wall of the torque disk base (41) is provided with an axially arranged base keyway (44), and is connected and fixed to the motor main shaft (1) through the rotor key (5).

4. The motor rotor and main shaft connection structure according to claim 3, characterized in that: The tensioning connecting sleeve (6) includes an inner tensioning sleeve ring (61) sleeved on the outside of the motor main shaft (1) and a radially protruding tensioning sleeve connecting ring (62) provided in the middle of its outer wall. The tensioning sleeve connecting ring (62) is provided with a plurality of tensioning sleeve through holes (63) on the same circumference. A tensioning ring (64) is provided on each side of the tensioning sleeve connecting ring (62). The tensioning ring (64) near the limiting stop ring (28) is provided with a tensioning ring threaded hole (65) coaxial with the tensioning sleeve through hole (63). The tensioning ring (64) near the spacer (7) is provided with a tensioning ring threaded hole (65). The upper part is provided with a tension ring through hole (66) coaxial with the tension sleeve through hole (63). A bolt is used to pass through the tension ring through hole (66) and the tension sleeve through hole (63) and connect to the tension ring threaded hole (65). The tension ring (64) has a trapezoidal cross section, with the end near the tension sleeve connecting ring (62) being the short side of the trapezoid and the end away from the tension sleeve connecting ring (62) being the long side of the trapezoid. An outer ring (67) of the tension sleeve is provided on the outside of the tension sleeve connecting ring (62) and the two tension rings (64) and is fixedly connected to the tension sleeve connecting ring (62) as a whole.

5. The motor rotor and main shaft connection structure according to claim 4, characterized in that: The spacer (7) includes a spacer ring (71) sleeved on the outside of the motor main shaft (1). The spacer ring (71) has a spacer connecting ring (72) radially protruding outward on the side near the tensioning connecting sleeve (6). The spacer connecting ring (72) has a spacer mounting ring (73) extending outward on the side near the tensioning connecting sleeve (6). The spacer mounting ring (73) has a plurality of spacer through holes (74) evenly distributed in a ring and coaxial with the clamping ring screw hole (29). The clamping ring (27) and the spacer (7) are connected as a whole by bolts.

6. The motor rotor and main shaft connection structure according to claim 5, characterized in that: The limiting ring (8) is circularly arranged, including two semi-circular limiting half-rings (81). The joint of the two limiting half-rings (81) is provided with limiting ring through holes (82) and they are connected as a whole by bolts. The limiting half-rings (81) are provided with multiple limiting ring screw holes (83) parallel to the axis on the other side opposite to the spacer (7) and the limiting sleeve (9) is installed by bolts.

7. The motor rotor and main shaft connection structure according to claim 6, characterized in that: The limiting sleeve (9) includes a circular limiting sleeve ring (91), on which a plurality of limiting sleeve through holes (92) coaxial with the limiting ring screw hole (83) are evenly distributed in a ring. The limiting sleeve (9) and the limiting ring (8) are connected together by bolts. The limiting sleeve ring (91) has a limiting sleeve retaining ring (93) on its outer side, which is used to prevent the bolts on the limiting ring (8) from falling off.

8. The motor rotor and main shaft connection structure according to claim 7, characterized in that: The motor spindle (1) has a radially concave spindle keyway (11) at a position corresponding to the keyway (44) of the base, and the rotor key (5) is simultaneously embedded in the keyway (44) of the base and the keyway (11) to connect the shaft transition torque disk (4) and the motor spindle (1) into one unit; the motor spindle (1) has a radially concave limiting installation ring (12) at a position corresponding to the limiting ring (8), and the limiting ring (8) is embedded in the limiting installation ring (12), and the installed limiting ring (8) abuts against one end of the spacer (7).

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