Directional arrangement mechanism for motor rotor punching sheets

Abstract

The utility model discloses a motor rotor punching sheet directional material arranging mechanism, and belongs to the technical field of motor manufacturing. The mechanism comprises a mounting base plate, a servo motor and a guide shaft with a positioning strip, wherein the servo motor drives the guide shaft to perform instantaneous variable-speed rotation through a connecting shaft. A detachable T-shaped positioning strip is axially arranged on the guide shaft, and a radial bulge of the T-shaped positioning strip is matched with an opening of an inner hole of the punching sheet in a limiting manner; the servo motor instantaneously changes the speed to enable the punching sheets to generate relative rotating speed difference due to inertia, so that the holes and the bulges are automatically aligned; the top of the guide shaft is of a conical guide structure, and a torsion spring is arranged in the connecting shaft to provide elastic reset and buffering. According to the utility model, high-speed automatic orientation of the punching sheets is realized through electromechanical cooperative control, the punching sheet sorting device has the advantages of high positioning precision, fast dynamic response, structure modularization and the like, solves the problems of low efficiency and high manual dependence degree of traditional material sorting, and is especially suitable for automatic stacking production of rotor punching sheets of multiple specifications.

Description

Technical Field

[0001] This utility model relates to the field of motor manufacturing technology, and in particular to a motor rotor lamination orientation and feeding mechanism. Background Technology

[0002] In the motor manufacturing process, the motor rotor is made by stacking multiple laminations. To ensure motor performance, these laminations need to be aligned and arranged in a specific direction (usually the direction of the keyway or opening in the inner hole) before stacking, which is called directional material handling.

[0003] Traditional motor rotor lamination feeding is mostly done manually, which is inefficient, labor-intensive, and prone to errors, resulting in a high product defect rate. While some automated equipment can achieve automatic feeding, rapid, fully automated feeding is difficult to achieve with traditional methods, often requiring manual handling. Therefore, it cannot achieve full automation and has low feeding efficiency. Utility Model Content

[0004] The present invention aims to solve the problems of low efficiency, low precision, complex structure or high cost of motor rotor lamination material handling in the prior art, and provides a new motor rotor lamination orientation mechanism to achieve efficient and accurate automatic orientation material handling.

[0005] This utility model also provides a motor rotor lamination orienting and feeding mechanism, including a mounting base plate, a servo motor, and a guide shaft.

[0006] The servo motor is fixedly mounted on the mounting base plate, and its output shaft is coaxially connected to the connecting shaft through a coupling; the outer surface of the guide shaft is provided with a positioning strip along the axial direction, and the outer peripheral surface of the positioning strip is provided with a radial protrusion for matching and limiting the opening of the inner hole of the punch; the servo motor drives the guide shaft to perform instantaneous speed change acceleration and deceleration rotation.

[0007] Furthermore, the side wall of the guide shaft is provided with a T-shaped notch, and the positioning strip is a T-shaped structural member adapted to the T-shaped notch, and is detachably inserted and fixed inside the guide shaft through the T-shaped notch.

[0008] Furthermore, when the radial protrusion of the positioning strip is inserted into the guide shaft, it partially protrudes beyond the outer circumferential surface of the guide shaft and forms a limiting fit with the opening of the inner hole of the lamination. When the servo motor performs instantaneous speed change acceleration and deceleration rotation, the motor rotor lamination maintains a high speed due to inertia, generating a relative speed difference with the guide shaft, which causes the opening and the radial protrusion to be circumferentially aligned, and the motor rotor lamination slides down the guide shaft to the bottom.

[0009] Furthermore, the output end of the servo motor is provided with a connecting shaft, and the guide shaft is detachably disposed inside the connecting shaft; the connecting shaft is also provided with a torsion spring, the two ends of the torsion spring respectively abutting the connecting shaft and the guide shaft, for providing elastic restoring force for the guide shaft.

[0010] Furthermore, the top of the guide shaft has a tapered structure to guide the laminations as they fall.

[0011] Furthermore, the servo motor has instantaneous acceleration and deceleration functions, with a speed control accuracy of ±5 rpm, and can complete the acceleration process from base speed to peak speed within 0.2 seconds.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] 1. High degree of automation and high efficiency: The instantaneous acceleration and deceleration of the guide shaft is controlled by a servo motor, and the inertia of the punch is used to achieve automatic alignment, which greatly improves the material handling efficiency and reduces labor costs.

[0014] 2. Precise positioning: By precisely controlling the speed and acceleration / deceleration rate of the servo motor, as well as the design of the positioning strip and radial protrusion, the precise circumferential alignment of the inner hole of the stamping and the guide shaft can be achieved, ensuring the accuracy of material handling.

[0015] 3. Simple structure and high reliability: The mechanism is mainly composed of servo motors, guide shafts and positioning bars, etc. The structure is relatively simple, easy to manufacture and maintain, and has high reliability.

[0016] 4. High adaptability: The positioning bar adopts a detachable T-shaped structural design, which makes it easy to replace and adjust according to the inner hole characteristics of different specifications of stampings, thus improving the adaptability of the equipment.

[0017] 5. Fast dynamic response: The use of a servo motor with instantaneous acceleration and deceleration function ensures the rapid formation of speed difference, which is conducive to improving material handling efficiency and is suitable for stacking multiple motor rotor laminations.

[0018] 6. Elastic buffer: A torsion spring is installed between the connecting shaft and the guide shaft to provide elastic restoring force to the guide shaft, which can absorb impact to a certain extent, protect the mechanism, and help with fine adjustment during the alignment process. Attached Figure Description

[0019] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0020] Figure 1 This is a schematic diagram of the structure of a motor rotor lamination orienting and feeding mechanism according to the present invention;

[0021] Figure 2 A three-dimensional structural diagram of the guide shaft and positioning strip;

[0022] Figure 3 This is a top view of the guide shaft and positioning strip.

[0023] Figure 4 This is a schematic diagram of the structure of a motor rotor lamination.

[0024] In the diagram: 1. Mounting base plate; 2. Servo motor; 3. Guide shaft; 31. Tapered structure; 32. Positioning strip; 33. Radial protrusion; 34. T-shaped notch; 4. Motor rotor lamination; 41. Opening; 5. Connecting shaft; 6. Torsion spring. Detailed Implementation

[0025] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0026] like Figures 1-4 As shown, a motor rotor lamination orientation and feeding mechanism includes a mounting base plate 1, a servo motor 2, and a guide shaft 3.

[0027] The servo motor 2 is fixedly mounted on the mounting base plate 1. The output shaft of the servo motor 2 is coaxially connected to the connecting shaft 5 via a coupling. The guide shaft 3 is vertically arranged, and its lower end is detachably located inside the connecting shaft 5, thereby enabling the servo motor 2 to drive the guide shaft 3 to rotate.

[0028] The top of the guide shaft 3 is designed as a tapered structure 31 to facilitate the insertion and descent of the motor rotor laminations 4.

[0029] A positioning strip 32 is provided on the outer surface of the guide shaft 3 along its axial direction. In this embodiment, a T-shaped notch 34 is provided on the side wall of the guide shaft 3, and the positioning strip 32 is a T-shaped structural component adapted to the T-shaped notch 34, which is detachably inserted and fixed inside the guide shaft 3 through the T-shaped notch 34. This design facilitates the replacement of positioning strips 32 of different sizes or shapes according to different motor rotor lamination 4 specifications and material thickness.

[0030] The outer circumferential surface of the positioning strip 32 is provided with a radial protrusion 33. When the positioning strip 32 is inserted into the guide shaft 3, the radial protrusion 33 protrudes from the outer circumferential surface of the guide shaft 3. The radial protrusion 33 is used to form a limiting fit with the opening 41 of the inner hole of the motor rotor lamination 4.

[0031] In a preferred embodiment of this invention, a torsion spring 6 is provided on the connecting shaft 5 to provide a certain elastic buffer and reset capability. The two ends of the torsion spring 6 abut against the outer walls of the connecting shaft 5 and the guide shaft 3, respectively, to provide an elastic reset force for the guide shaft 3 when the guide shaft 3 and the connecting shaft 5 undergo slight relative rotation. This helps to absorb the impact during the alignment process and assists in alignment.

[0032] The servo motor 2 is selected from models with instantaneous acceleration and deceleration functions. For example, its speed control accuracy can reach ±5 rpm, and it can complete the acceleration or deceleration process from base speed to peak speed (or from peak speed to base speed) within 0.2 seconds. This high-performance servo motor 2 is the key to realizing the material handling method described in this utility model.

[0033] The material handling method of this utility model includes the following steps:

[0034] Step 1: Initial preparation and placement.

[0035] The motor rotor lamination 4, to be processed, is fitted from above onto the tapered structure 31 at the top of the vertically positioned guide shaft 3. Under gravity, the motor rotor lamination 4 slides down the guide shaft 3 until its lower surface contacts the top of the positioning strip 32, at which point it temporarily stops. At this point, the inner hole 41 of the motor rotor lamination 4 is typically misaligned with the radial protrusion 33 on the positioning strip 32. The servo motor 2 can initially drive the guide shaft 3 to rotate at a lower reference speed, or remain stationary.

[0036] Step 2: Synchronize and accelerate rotation.

[0037] The servo motor 2 is controlled to perform an acceleration action, causing the rotational speed of the guide shaft 3 to instantly increase from the current speed to the first threshold speed. Due to the friction between the motor rotor lamination 4 and the guide shaft 3, and the rapid acceleration process, the motor rotor lamination 4 will overcome the relative sliding tendency between itself and the guide shaft 3 under the action of inertia, and will rotate in basically synchronously with the guide shaft 3.

[0038] Step 3: Deceleration generates a relative speed difference to achieve alignment.

[0039] After the guide shaft 3 reaches and stabilizes at the first threshold speed, the servo motor 2 is immediately controlled to perform a deceleration action, causing the speed of the guide shaft 3 to instantly decrease to the second threshold speed. The first threshold speed V1 is greater than the second threshold speed V2, forming a predetermined speed difference between the two.

[0040] During the rapid deceleration of the guide shaft 3, due to rotational inertia, the motor rotor lamination 4 attempts to maintain its original higher speed. Therefore, the speed of the motor rotor lamination 4 will be higher than the actual speed of the guide shaft 3, creating a relative speed difference between the motor rotor lamination 4 and the guide shaft 3. This relative speed difference causes the motor rotor lamination 4 to rotate circumferentially relative to the guide shaft 3 and the positioning strip 32. When the opening 41 of the inner hole of the motor rotor lamination 4 rotates to a position aligned with the radial protrusion 33 of the positioning strip 32 on the guide shaft 3, the radial protrusion 33 no longer obstructs the opening 41 of the motor rotor lamination 4.

[0041] Step 4: Slide down to complete the orientation.

[0042] Once the opening 41 of the inner hole of the motor rotor lamination 4 is aligned with the radial protrusion 33 on the guide shaft 3, the motor rotor lamination 4 loses the axial support of the radial protrusion 33 and slides smoothly down the guide shaft 3 to the bottom of the guide shaft or the top of the stack of sorted motor rotor laminations 4 under the action of gravity, thus completing the orientation and sorting process of a motor rotor lamination 4.

[0043] By repeating the above steps, continuous, efficient, and automated directional feeding of batch motor rotor laminations 4 can be achieved.

[0044] This invention's method is particularly advantageous when continuously processing multiple stacked motor rotor laminations 4. By precisely controlling the instantaneous acceleration and deceleration of the guide shaft 3 through the servo motor 2, the inertia of the motor rotor lamination 4 being processed can be continuously utilized to achieve rapid and automatic alignment and descent with the guide shaft 3, thereby efficiently realizing automated material handling.

[0045] In contrast, traditional material handling methods that use a constant rotation speed cannot achieve rapid material handling. Especially when multiple motor rotor laminations 4 are stacked, the overall inertia of the entire stack of motor rotor laminations 4 during rotation, as well as the pressure and friction between the motor rotor laminations 4, makes it difficult for the bottom motor rotor lamination 4 to independently adjust its posture to achieve precise positioning with the guide shaft 3 and fall smoothly. This problem of "bottom motor rotor lamination 4 being difficult to position and fall" caused by the overall inertia hindering local fine alignment makes rapid, fully automatic material handling difficult to achieve in traditional methods. In this case, manual handling is often required, thus failing to achieve full automation and resulting in low material handling efficiency.

[0046] The specific values ​​of the first threshold speed V1 and the second threshold speed V2, as well as the predetermined speed difference ΔV between them, can be experimentally set and optimized based on the specific size, weight, friction coefficient of the motor rotor lamination 4 and the performance of the servo motor 2, in order to achieve the best alignment effect and material handling efficiency.

[0047] For example, the first threshold speed can be set to 500-1500 rpm, and the second threshold speed can be set to 0-500 rpm, depending on the size of the material gap. The predetermined speed difference must at least ensure that the motor rotor lamination 4 has sufficient relative rotational inertia to complete the alignment. The fast response capability of the servo motor 2 is the key to achieving this "instantaneous" acceleration and deceleration, ensuring that the inertial effect can be effectively utilized.

[0048] This invention utilizes a servo motor 2 to precisely control the "acceleration-deceleration" sequence of the guide shaft 3, cleverly leveraging the inertial effect of the motor rotor lamination 4 during rapid speed changes to induce relative rotation with the guide shaft 3. This achieves automatic alignment of the opening 41 within the inner hole of the motor rotor lamination 4 with the positioning features on the guide shaft 3, ultimately completing the directional material handling. This method and mechanism offer significant advantages, including relative simplicity, precise control, high material handling efficiency, and accurate alignment. In particular, it overcomes the bottleneck of traditional methods when handling multiple stacked laminations, enabling highly efficient, fully automated continuous material handling operations. It is highly suitable for the precision orientation requirements of rotor laminations in automated motor production lines.

Claims

1. A motor rotor lamination orienting and feeding mechanism, characterized in that: It includes a mounting base plate (1), a servo motor (2) and a guide shaft (3). The servo motor (2) is fixedly mounted on the upper surface of the mounting base plate (1), and its output shaft is coaxially connected to the connecting shaft (5) through a coupling. The outer surface of the guide shaft (3) is provided with a positioning strip (32) along the axial direction. The outer peripheral surface of the positioning strip (32) is provided with a radial protrusion (33) for matching and limiting the position with the opening (41) of the inner hole of the motor rotor lamination (4). The servo motor (2) drives the guide shaft (3) to perform instantaneous speed changes for acceleration and deceleration.

2. The motor rotor lamination orientation and feeding mechanism according to claim 1, characterized in that: The guide shaft (3) has a T-shaped notch (34) on its side wall. The positioning strip (32) is a T-shaped structural component that is adapted to the T-shaped notch (34) and is detachably inserted and fixed inside the guide shaft (3) through the T-shaped notch (34).

3. The motor rotor lamination orientation and feeding mechanism according to claim 1, characterized in that: The radial protrusion (33) of the positioning strip (32) protrudes partially from the outer circumferential surface of the guide shaft (3) when it is inserted into the guide shaft (3), and forms a limiting fit with the opening (41) of the inner hole of the motor rotor lamination (4); When the servo motor (2) rotates at an instantaneous speed change, the motor rotor lamination (4) maintains a high speed due to inertia and generates a relative speed difference with the guide shaft (3), which causes the opening (41) and the radial protrusion (33) to be circumferentially aligned, and the motor rotor lamination (4) slides down the guide shaft (3) to the bottom.

4. The motor rotor lamination orientation and feeding mechanism according to claim 1, characterized in that: The output end of the servo motor (2) is provided with a connecting shaft (5), and the guide shaft (3) is detachably disposed inside the connecting shaft (5); The connecting shaft (5) is also provided with a torsion spring (6), the two ends of which abut against the connecting shaft (5) and the guide shaft (3) respectively, and are used to provide elastic restoring force for the guide shaft (3).

5. The motor rotor lamination orientation and feeding mechanism according to claim 1, characterized in that: The top of the guide shaft (3) is a tapered structure (31) used to guide the motor rotor laminations (4) to fall.

6. The motor rotor lamination orientation and feeding mechanism according to claim 1, characterized in that: The servo motor (2) has instantaneous acceleration and deceleration functions, and its speed control accuracy reaches ±5 rpm. It can complete the acceleration process from base speed to peak speed within 0.2s.

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