A clamped three-phase asynchronous motor structure

Abstract

This utility model provides a clampable three-phase asynchronous motor structure, including a housing, a stator, a rotor, and a shaft. The stator is fixed to the inner wall of the housing, and the rotor is disposed inside the stator. A front cover is fixed to one end of the housing, and a rear cover is fixed to the other end of the housing. A front through hole is provided on the front cover, and the shaft is connected to the rotor via a key. A rear through hole is provided on the rear cover, and both ends of the shaft pass through the front and rear through holes, respectively. A mounting hole for connecting a working component is provided at the end of the shaft near the front through hole. A power component is connected to the housing and / or the rear cover. The power component drives the shaft to move along the axial direction of the shaft. A positioning bead is provided on the side wall of the shaft, and a transmission assembly is provided on the front cover. When the shaft moves to one side along its own axial direction, the transmission assembly drives the positioning bead to clamp the working component, thereby achieving the purpose of clamping the working component.

Description

Technical Field

[0001] This utility model relates to a three-phase asynchronous motor, and more particularly, to a clampable three-phase asynchronous motor structure. Background Technology

[0002] Traditional three-phase motors are typically used to provide power, and their structural design prioritizes efficient operation and heat dissipation. For example, Chinese patent CN217769708U discloses a three-phase motor that enhances heat dissipation performance through heat dissipation fins and interconnected heat dissipation slots on the outer casing to ensure stable motor operation.

[0003] While this design offers some advantages in heat dissipation, its core problem lies in its limited functionality and lack of integration with external mechanical systems. In many industrial applications, motors not only need to provide rotational power but also serve as the core of actuators, directly driving and clamping working components such as cutting tools. However, the three-phase motors in the aforementioned prior art lack a dedicated structure for clamping external components, rendering them unable to directly undertake such tasks. Utility Model Content

[0004] In view of this, the purpose of this utility model is to provide a clampable three-phase asynchronous motor structure to achieve the purpose of clamping working parts.

[0005] To solve the above-mentioned technical problems, the technical solution of this utility model is: a clampable three-phase asynchronous motor structure, including a housing, a stator, a rotor, and a shaft. The stator is fixed to the inner wall of the housing, and the rotor is disposed inside the stator. A front cover is fixed to one end of the housing, and a rear cover is fixed to the other end of the housing. A front through hole is provided on the front cover. The shaft is connected to the rotor by a key. A rear through hole is provided on the rear cover. Both ends of the shaft pass through the front through hole and the rear through hole, respectively. A mounting hole for connecting a working component is provided at the end of the shaft near the front through hole. A power component is connected to the housing and / or the rear cover. The power component drives the shaft to move along the axial direction of the shaft. A positioning bead is provided on the side wall of the shaft. A transmission assembly is provided on the front cover. When the shaft moves to one side along its own axial direction, the transmission assembly drives the positioning bead to clamp the working component.

[0006] To achieve the above technical solution, during operation, an external power component drives the rotating shaft to move axially. When the rotating shaft moves in a specific direction, the positioning beads on its sidewall interact with the transmission assembly fixed on the front end cover. The transmission assembly converts the axial displacement of the positioning beads into radial displacement, thereby driving the positioning beads to automatically clamp the working parts within the mounting holes. Furthermore, when the stator is energized, the rotor can drive the rotating shaft to rotate, thereby causing the rotating shaft to drive the working parts to rotate. This design innovatively extends the single rotation function of a traditional motor to the dual functions of rotational drive and linear clamping, achieving a high degree of integration between the power source and the actuator, and solving the technical problem that traditional motors cannot be directly used as clamping actuators.

[0007] As a preferred embodiment of this utility model, the transmission assembly includes a connecting hole, an anti-detachment ring, and an inclined ring. The connecting hole is opened on the inner wall of the mounting hole and communicates with the outer wall of the rotating shaft. The positioning bead is rotatably connected in the connecting hole. The anti-detachment ring is fixed on the inner wall of the connecting hole and is located at the end of the connecting hole near the mounting hole. The positioning bead partially passes through the anti-detachment ring and is used to abut against the working part. The inclined ring is fixed on the front end cover and is used to abut against the side of the positioning bead away from the anti-detachment ring. The inclined ring is flared.

[0008] To achieve the above technical solution, during operation, when the shaft moves axially, the positioning bead located in the connecting hole rolls along the inner wall of the trumpet-shaped inclined ring fixed to the front end cover. Due to the tapered effect of the inclined ring, the positioning bead is forced to generate radial displacement while moving axially, passing through the anti-detachment ring and moving towards the center, thereby pressing against and clamping the working part. This solution, through the cooperation of the "positioning bead-inclined ring," provides a concrete way to efficiently and stably convert axial thrust into radial clamping force. At the same time, the anti-detachment ring effectively prevents the positioning bead from falling off when not in operation, making the clamping structure simple, reliable, and easy to implement.

[0009] As a preferred embodiment of this utility model, a limiting ring is fixedly connected to the end of the connecting hole away from the anti-detachment ring, and the positioning bead rolls between the anti-detachment ring and the limiting ring. The positioning bead extends out of the limiting ring and is used to abut against the inclined ring.

[0010] To achieve the above technical solution, a limiting ring is added inside the connecting hole to constrain the positioning bead between the anti-detachment ring and the limiting ring. This structure effectively prevents the positioning bead from falling off during movement, ensuring the integrity of the clamping mechanism and its long-term reliability.

[0011] In a preferred embodiment of this utility model, the power component includes a support plate, a power cylinder, a support rod, and a straight hole. The straight hole is opened on the rear end cover. One end of the support rod is fixed to the outer shell, and the other end of the support rod passes through the straight hole and is fixedly connected to the support plate. The power cylinder is fixed on the support plate, and the power shaft of the power cylinder is connected to the rotating shaft through a rotating assembly.

[0012] To achieve the above technical solution, a support rod passing through the rear end cover is used to rigidly connect the support plate to the motor housing, and the power shaft of the power cylinder is then connected to the motor shaft. This structure rigidly separates the power cylinder, which provides axial driving force, from the motor body, ensuring precise coaxiality between the power cylinder and the motor shaft. This allows the thrust generated by the power cylinder to be applied stably and without bias to the shaft, improving the structural rigidity, stability, and force transmission efficiency of the entire clamping drive assembly. The rotating component allows relative rotation between the power shaft and the motor shaft when the rotor rotates.

[0013] In a preferred embodiment of this utility model, the rotating assembly includes a connecting sleeve, a bearing, a fixing tube, and a locking bolt. The power shaft is fixed to the outer wall of the connecting sleeve, the outer wall of the bearing is fixed to the inner wall of the connecting sleeve, the fixing tube is fixed to the inner wall of the bearing, the rotating shaft passes through the fixing tube, and the locking bolt passes through the fixing tube and is threadedly connected to the rotating shaft. The locking bolt abuts against the fixing tube.

[0014] To achieve the above technical solution, the linear thrust applied by the non-rotating power shaft of the power cylinder is transmitted to the outer ring of the bearing through the connecting sleeve, and then acts on the motor shaft through the inner ring of the bearing, the fixing tube, and the locking bolt, driving the shaft to move axially. Simultaneously, the presence of the bearing allows the motor shaft to rotate freely relative to the connecting sleeve while bearing this axial force. By setting up the rotating assembly, the decoupling of the linear drive force transmission and the motor's rotational motion is successfully achieved, ensuring that the clamping action does not interfere with or hinder the normal rotational function of the shaft.

[0015] As a preferred embodiment of this utility model, an inner hexagonal bevel is provided on the inner wall of the fixed tube, and an outer hexagonal bevel is provided on the outer wall of the rotating shaft. The outer hexagonal bevel is used to fit against the inner hexagonal bevel.

[0016] To achieve the above technical solution, matching internal and external hexagonal bevels are respectively provided on the inner wall of the fixed tube and the outer wall of the rotating shaft. When the rotating shaft and the fixed tube are assembled and an axial locking force is applied, the internal and external hexagonal bevels interact and fit tightly together. This structure utilizes the self-centering characteristics and huge frictional locking force of the conical surface fit to form a high-strength, gapless connection, thereby reliably transmitting large torques and effectively preventing relative rotation or angular play between the two under high loads or start-stop impacts, significantly enhancing the rigidity of power transmission and connection reliability.

[0017] As a preferred embodiment of this utility model, multiple support rods are provided, and the multiple support rods are evenly distributed along the axis of rotation.

[0018] To achieve the above technical solution, by evenly distributing multiple support rods along the axis of rotation, the support plate to which the power cylinder is fixed can obtain a more uniform and stable support force. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the external structure of this utility model; Figure 2 This is a schematic diagram of the external structure of this utility model; Figure 3 This is a schematic diagram of the exploded structure of this utility model; Figure 4 This is a schematic diagram of the exploded structure of this utility model; Figure 5 This is a diagram illustrating the position of the connecting sleeve; Figure 6 for Figure 5 Enlarged view of point A.

[0020] Reference numerals: 1. Housing; 2. Stator; 3. Rotor; 4. Shaft; 5. Front cover; 6. Rear cover; 7. Front through hole; 8. Rear through hole; 9. Mounting hole; 10. Power component; 11. Support plate; 12. Power cylinder; 13. Support rod; 14. Straight hole; 15. Rotating assembly; 16. Connecting sleeve; 17. Bearing; 18. Fixing tube; 19. Locking bolt; 20. Internal hexagonal bevel; 21. External hexagonal bevel; 23. Transmission assembly; 24. Connecting hole; 25. Anti-detachment ring; 26. Angled ring; 27. Positioning bead; 29. ​​Limiting ring; 30. Power shaft. Detailed Implementation

[0021] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings, so that the technical solution of this utility model can be more easily understood and mastered.

[0022] A clampable three-phase asynchronous motor structure includes a housing 1, a stator 2, a rotor 3, and a shaft 4. The stator 2 is fixed to the inner wall of the housing 1, and the rotor 3 is disposed inside the stator 2. A front cover 5 is fixed to one end of the housing 1, and a rear cover 6 is fixed to the other end of the housing 1.

[0023] A front through hole 7 is provided on the front cover 5, and a rear through hole 8 is provided on the rear cover 6.

[0024] The rotating shaft 4 is connected to the rotor 3 via a flat key. The length direction of the flat key is parallel to the axial direction of the rotor 3, allowing the rotating shaft 4 to translate along its own axial direction. The rotating shaft 4 and the rotor 3 are coaxially arranged. The two ends of the rotating shaft 4 pass through the front through hole 7 and the rear through hole 8, respectively.

[0025] A mounting hole 9 for connecting a working component is provided at one end of the rotating shaft 4 near the front through hole 7. The mounting hole 9 is coaxially arranged with the rotating shaft 4. A power component 10 is connected to the housing 1. The power component 10 drives the rotating shaft 4 to move along the axial direction of the rotating shaft 4.

[0026] The power component 10 includes a support plate 11, a power cylinder 12, a support rod 13, and straight holes 14. The straight holes 14 are formed on the rear end cover 6, and three straight holes 14 are evenly distributed along the axis of the rotating shaft 4. One end of the support rod 13 is fixed to the outer casing 1, and the other end of the support rod 13 passes through the straight holes 14 and is fixedly connected to the support plate 11. Each straight hole 14 contains one support rod 13. The support plate 11 has a triangular cross-section, and the three support rods 13 are respectively located near the three corners of the support plate 11.

[0027] The power cylinder 12 is fixed on the support plate 11, and the power shaft 30 of the power cylinder 12 is connected to the rotating shaft 4 through the rotating assembly 15. The power cylinder 12 is a pneumatic cylinder.

[0028] The rotating assembly 15 includes a connecting sleeve 16, a bearing 17, a fixing tube 18, and a locking bolt 19. The power shaft 30 is fixed to the outer wall of the connecting sleeve 16, and the power shaft 30 and the connecting sleeve 16 are coaxially arranged. The outer wall of the bearing 17 is fixed to the inner wall of the connecting sleeve 16, and the fixing tube 18 is fixed to the inner wall of the bearing 17.

[0029] The rotating shaft 4 is inserted into the fixed tube 18, and the locking bolt 19 passes through the outer wall of the fixed tube 18 and is threadedly connected to the rotating shaft 4. The locking bolt 19 is pressed against the outer wall of the fixed tube 18.

[0030] An internal hexagonal bevel 20 is formed on the inner wall of the fixed tube 18, and an external hexagonal bevel 21 is formed on the outer wall of the rotating shaft 4. When the rotating shaft 4 is inserted into the fixed tube 18, the external hexagonal bevel 21 is used to fit against the internal hexagonal bevel 20.

[0031] Positioning beads 27 are provided on the side wall of the rotating shaft 4, and multiple positioning beads 27 are evenly distributed along the axis of the rotating shaft 4. A transmission assembly 23 is provided on the front cover 5. When the rotating shaft 4 moves to one side along its own axis, the transmission assembly 23 drives the positioning beads 27 to clamp the working part.

[0032] The transmission assembly 23 includes a connecting hole 24, an anti-detachment ring 25, and a bevel ring 26. The connecting hole 24 is formed on the inner wall of the mounting hole 9 and communicates with the outer wall of the rotating shaft 4. A positioning bead 27 is rotatably connected to the connecting hole 24. The anti-detachment ring 25 is fixed to the inner wall of the connecting hole 24 and is located at the end of the connecting hole 24 near the mounting hole 9. The positioning bead 27 partially passes through the anti-detachment ring 25 and is used to abut against the working part.

[0033] The inclined ring 26 is fixed to the front cover 5 and is used to abut against the side of the positioning bead 27 away from the anti-detachment ring 25. The rotating shaft 4 passes through the center of the inclined ring 26. The inclined ring 26 is flared.

[0034] The end of the connecting hole 24 away from the anti-detachment ring 25 is fixedly connected to the limiting ring 29. The positioning bead rolls between the anti-detachment ring 25 and the limiting ring 29. The positioning bead 27 extends out of the limiting ring 29 and is used to abut against the inclined ring 26.

[0035] When it is necessary to clamp the working parts, the operation procedure is as follows: An external control system supplies air to the power cylinder 12, which is fixed to the support plate 11, driving its power shaft 30 to extend. The power shaft 30 pushes the connecting sleeve 16, which is coaxially fixed to it. The connecting sleeve 16 then applies this linear thrust to the outer ring of the bearing 17 within the rotating assembly 15. This thrust is transmitted through the bearing 17 to its inner ring and acts on the fixed tube 18. Since the fixed tube 18 is rigidly locked to the rotating shaft 4 by the inner hexagonal bevel 20, the outer hexagonal bevel 21, and the locking bolt 19, the rotating shaft 4 begins to translate along its axial direction toward the front end cover 5 of the motor.

[0036] As the rotating shaft 4 moves forward, the multiple positioning beads 27 on its side wall also move. At this time, the positioning beads 27 will come into contact with and roll against the inner conical surface of the trumpet-shaped "sloping ring 26" fixed on the front end cover 5.

[0037] As the inner diameter of the inclined ring 26 gradually narrows from back to front, the positioning bead 27 is forced to undergo radial displacement towards the center of the rotating shaft 4 as it moves forward along the inner wall of the inclined ring 26. This radial displacement causes the positioning bead 27 to partially pass through the anti-loosening ring 25, protrude from the connecting hole 24 on the inner wall, and finally secure the working part, which has been placed in the mounting hole 9, with a uniform force. The clamping process is now complete.

[0038] Once the working parts are reliably clamped, the motor can then be used as the power spindle for rotational operation. When the three-phase power supply is turned on, the stator 2 generates a rotating magnetic field, driving the rotor 3 to rotate. The rotational motion of the rotor 3 is transmitted to the shaft 4 via a parallel key parallel to the axial direction along its length. This connection method reliably transmits torque while allowing the shaft 4 to translate axially when needed without affecting torque transmission. The shaft 4 transmits the rotational motion to the fixed tube 18 and the inner ring of the bearing 17 via the inner hexagonal bevel 20 and the outer hexagonal bevel 21. Due to the presence of the bearing 17, the connecting sleeve 16, which bears the linear thrust, and the outer ring of the bearing 17 remain stationary, while the shaft 4, the fixed tube 18, and the inner ring of the bearing 17 can rotate at high speed. This achieves perfect decoupling between the linear drive of the cylinder and the high-speed rotation of the motor.

[0039] Ultimately, the rotating shaft 4 drives the clamped working part to perform stable and precise rotational machining.

[0040] When the work is completed and the work component needs to be unloaded, the operation procedure is as follows: The control system changes the air supply direction of the power cylinder 12, causing its power shaft 30 to retract backward. The power shaft 30 pulls the rotating shaft 4 backward via the rotating assembly 15, causing it to translate along the axial direction towards the rear end cover 6 of the motor. As the rotating shaft 4 moves backward, the positioning bead 27 also moves backward, and the inclined ring 26 no longer applies pressure to the positioning bead 27. At this time, the force exerted by the inclined ring 26 on the positioning bead 27 disappears, and the clamping force on the working part is completely eliminated. The working part can then be easily removed from the mounting hole 9.

[0041] Of course, the above are just typical examples of this utility model. In addition, this utility model may have many other specific implementation methods. All technical solutions formed by equivalent substitution or equivalent transformation fall within the scope of protection claimed by this utility model.

Claims

1. A clampable three-phase asynchronous motor structure, comprising a housing (1), a stator (2), a rotor (3), and a shaft (4), wherein the stator (2) is fixed to the inner wall of the housing (1), the rotor (3) is disposed inside the stator (2), a front end cover (5) is fixed to one end of the housing (1), and a rear end cover (6) is fixed to the other end of the housing (1), wherein a front through hole (7) is provided on the front end cover (5), characterized in that: The rotating shaft (4) is connected to the rotor (3) by a key. The rear end cover (6) has a rear through hole (8). The two ends of the rotating shaft (4) pass through the front through hole (7) and the rear through hole (8) respectively. The rotating shaft (4) has a mounting hole (9) for connecting the working part at the end near the front through hole (7). The housing (1) and / or the rear end cover (6) are connected to a power component (10). The power component (10) drives the rotating shaft (4) to move along the axial direction of the rotating shaft (4). The side wall of the rotating shaft (4) is provided with a positioning bead (27). The front end cover (5) is provided with a transmission component (23). When the rotating shaft (4) moves to one side along its own axial direction, the transmission component (23) drives the positioning bead (27) to clamp the working part.

2. The clampable three-phase asynchronous motor structure according to claim 1, characterized in that: The transmission assembly (23) includes a connecting hole (24), an anti-detachment ring (25), and an inclined ring (26). The connecting hole (24) is opened on the inner wall of the mounting hole (9) and communicates with the outer wall of the rotating shaft (4). The positioning bead (27) is rolled in the connecting hole (24). The anti-detachment ring (25) is fixed on the inner wall of the connecting hole (24) and located at the end of the connecting hole (24) near the mounting hole (9). The positioning bead (27) partially passes through the anti-detachment ring (25) and is used to abut against the working part. The inclined ring (26) is fixed on the front end cover (5) and is used to abut against the side of the positioning bead (27) away from the anti-detachment ring (25). The inclined ring (26) is flared.

3. The clampable three-phase asynchronous motor structure according to claim 2, characterized in that: The end of the connecting hole (24) away from the anti-detachment ring (25) is fixedly connected to the limiting ring (29). The positioning bead (27) rolls between the anti-detachment ring (25) and the limiting ring (29). The positioning bead (27) extends out of the limiting ring (29) and is used to abut against the inclined ring (26).

4. The clampable three-phase asynchronous motor structure according to claim 1, characterized in that: The power component (10) includes a support plate (11), a power cylinder (12), a support rod (13), and a straight hole (14). The straight hole (14) is opened on the rear end cover (6). One end of the support rod (13) is fixed to the outer shell (1), and the other end of the support rod (13) passes through the straight hole (14) and is fixedly connected to the support plate (11). The power cylinder (12) is fixed on the support plate (11), and the power shaft (30) of the power cylinder (12) is connected to the rotating shaft (4) through the rotating assembly (15).

5. The clampable three-phase asynchronous motor structure according to claim 4, characterized in that: The rotating assembly (15) includes a connecting sleeve (16), a bearing (17), a fixing tube (18), and a locking bolt (19). The power shaft (30) is fixed to the outer wall of the connecting sleeve (16), the outer wall of the bearing (17) is fixed to the inner wall of the connecting sleeve (16), the fixing tube (18) is fixed to the inner wall of the bearing (17), the rotating shaft (4) passes through the fixing tube (18), and the locking bolt (19) passes through the fixing tube (18) and is threadedly connected to the rotating shaft (4). The locking bolt (19) abuts against the fixing tube (18).

6. The clampable three-phase asynchronous motor structure according to claim 5, characterized in that: The inner wall of the fixed tube (18) is provided with an inner hexagonal bevel (20), and the outer wall of the rotating shaft (4) is provided with an outer hexagonal bevel (21). The outer hexagonal bevel (21) is used to fit with the inner hexagonal bevel (20).

7. The clampable three-phase asynchronous motor structure according to claim 4, characterized in that: Multiple support rods (13) are provided, and the multiple support rods (13) are evenly distributed along the axis of the rotating shaft (4).

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