Device for detecting flatness of riveting surface of rotor core

Abstract

The utility model discloses a rotor iron core pressure riveting surface flatness detection device, comprising a positioning clamp used for clamping and fixing an iron core so that the pressure riveting surface of the iron core is vertically aligned with a detection mechanism, the detection mechanism is arranged above the positioning clamp in a lifting manner, and the lower end surface of the detection mechanism is provided with a plurality of detection units. The plurality of detection units are respectively arranged corresponding to a plurality of pressing rivet points on the pressing rivet surface; the detection unit is provided with a plurality of detection contacts, and the plurality of detection contacts are symmetrically arranged relative to the corresponding pressing rivet points. The utility model solves the problem that the traditional flatness detection equipment is not suitable for detecting the flatness of the riveting surface of the rotor core.

Description

Technical Field

[0001] The utility model relates to the technical field of detection equipment, in particular to a flatness detection device for the riveting surface of a rotor core. Background Art

[0002] The rotor core is formed into a whole by compacting and fixing multiple laminated sheets through a riveting process. To ensure the quality of its finished product, it is necessary to detect the flatness of its riveting surface. Since the flatness of its riveting surface is affected by the riveting process, there are several riveting points distributed on it. Common flatness detection devices mostly achieve as comprehensive measurement of the flatness of the overall surface to be measured as possible by evenly arranging detection points. It is difficult to obtain a detection result that meets the requirements for evaluating the quality of its riveting surface by using common flatness detection devices. Summary of the Invention

[0003] Object of the Invention: In order to overcome the deficiencies existing in the prior art, the utility model provides a flatness detection device for the riveting surface of a rotor core, which solves the problem that traditional flatness detection devices are not applicable to the flatness detection of the riveting surface of a rotor core.

[0004] Technical Solution: To achieve the above object, a flatness detection device for the riveting surface of a rotor core of the utility model includes a positioning fixture for clamping and fixing the core so that its riveting surface is vertically aligned with the detection mechanism. The detection mechanism is arranged above the positioning fixture in a liftable manner. A plurality of detection units are arranged on the lower end surface of the detection mechanism. The plurality of detection units are respectively arranged corresponding to a plurality of riveting points on the riveting surface. Each detection unit is provided with a plurality of detection contacts, and the plurality of detection contacts are symmetrically arranged with respect to the corresponding riveting points.

[0005] Further, the detection contacts are contact displacement sensors, and the plurality of detection contacts are fixedly connected to the output end of the lift drive mechanism through a fixed bracket.

[0006] Further, the detection unit is provided with a positioning structure. A positioning hole is arranged at the center of the bottom surface of the positioning structure, and the positioning hole is sleeved and matched with the protrusion of the riveting point. The positioning structure is provided with a plurality of through holes, and the plurality of detection contacts are correspondingly inserted and matched with the plurality of through holes.

[0007] Further, the positioning structure and the fixed bracket are connected through an elastic member. When the elastic member is at its original length, the detection contacts are retracted in the through holes.

[0008] Further, the detection unit is provided with a limiting structure. The limiting structure is fixedly arranged on the bottom side of the fixed bracket. The limiting structure is provided with a guiding and sliding hole adapted to the positioning structure. A plurality of limiting blocks are arranged on the periphery of the limiting structure, and all the plurality of limiting blocks are in contact with the outer circumferential surface of the core. The limiting blocks are in close contact and limiting cooperation with the upper end surface of the positioning fixture.

[0009] Further, each of the detection units is provided with two detection contacts, and the two detection contacts are arranged radially along the iron core.

[0010] Beneficial effects: In a flatness detection device for the riveting surface of a rotor iron core according to the present utility model, by specifically providing independent detection units corresponding to each riveting point for separately detecting the planes around each riveting point, the number of detection points arranged is reduced, the acquisition of invalid data is reduced, thereby reducing the difficulty of data processing, improving the accuracy of flatness detection, and making the detection results more reliable. It solves the problem that traditional flatness detection equipment is not applicable to the flatness detection of the riveting surface of a rotor iron core. Description of the Drawings

[0011] Figure 1 is a schematic diagram of the overall structure of an embodiment of the present utility model;

[0012] Figure 2 is a schematic diagram of the structure of a detection unit of an embodiment of the present utility model. Detailed Embodiments

[0013] The present utility model will be further described below with reference to the drawings.

[0014] As shown in the attached Figure 1-2 A flatness detection device for the riveting surface of a rotor iron core includes a positioning fixture 1 for clamping and fixing the iron core 2 so that its riveting surface is vertically aligned with the detection mechanism. The detection mechanism is arranged to be lifted and lowered above the positioning fixture 1. A plurality of detection units 3 are provided on the lower end surface of the detection mechanism, and the plurality of detection units 3 are respectively arranged corresponding to a plurality of riveting points 21 on the riveting surface; the detection unit 3 is provided with a plurality of detection contacts 4, and the plurality of detection contacts 4 are symmetrically arranged with respect to the corresponding riveting point 21.

[0015] Since the flatness detection of the riveting surface is mainly aimed at evaluating the influence of riveting tension on the flatness of the surface around the riveting point, in this solution, by specifically providing independent detection units corresponding to each riveting point for separately detecting the planes around each riveting point, by connecting the detection signal output ends of the plurality of detection contacts of a single detection unit to the same processing module, through data processing and comparison, the flatness of the plane around the riveting point is obtained, thereby evaluating and obtaining the flatness detection result of the plane around the riveting point. Then, the detection data of the plurality of detection units are uploaded to the upper-layer general processing module, and through overall comparison, the flatness detection result of the entire riveting surface of the rotor iron core is evaluated, so as to accurately obtain the effective data for flatness detection evaluation of the riveting surface, reduce the number of detection points arranged, reduce the acquisition of invalid data, thereby reducing the difficulty of data processing, improving the accuracy of flatness detection, and making the detection results more reliable.

[0016] The detection contact 4 is a contact displacement sensor, and a plurality of the detection contacts 4 are fixedly connected to the output end of the lifting drive mechanism through a fixing bracket 5. The fixing bracket can fix the relative positional relationship of the plurality of detection contacts. The contact ends of the plurality of detection contacts are flush, and they can rise or fall synchronously through the drive of the lifting mechanism, ensuring the data reliability of each detection contact. Using a contact displacement sensor has higher accuracy and is not affected by ambient light compared to optical induction ranging, further improving the reliability of the detection result.

[0017] The detection unit 3 is provided with a positioning structure 6. A positioning hole 61 is provided at the center of the bottom surface of the positioning structure 6, and the positioning hole 61 is sleeved and matched with the protrusion of the riveting point 21. The positioning structure 6 is provided with a plurality of through holes 62, and a plurality of the detection contacts 4 are correspondingly inserted and matched with the plurality of through holes 62. On the basis that the bottom positioning fixture 1 positions and clamps the rotor core, secondary positioning is carried out with the riveting protrusion on the riveting surface as a reference through the positioning structure, ensuring that the detection points are symmetrically distributed on both sides of the riveting point, so as to compare and detect the height difference between the two planes on both sides of the riveting point.

[0018] The positioning structure 6 and the fixing bracket 5 are connected by an elastic member. When the elastic member is at its original length, the detection contact 4 retracts into the through hole 62. When detecting, first, the contact iron core of the positioning structure touches the riveting surface of the core, and then the detection contact touches the riveting surface. First, it can be pre-positioned through the central positioning hole of the positioning structure, and then detected by the detection contact. Second, it can avoid the large impact on the internal components of the contact displacement sensor caused by the detection contact directly touching the riveting surface after quickly approaching the riveting surface, affecting the detection result, and maintaining the good sensitivity of the sensor. At the same time, the detection contact is located in the through hole throughout the process, effectively protecting the detection contact from external force damage and extending the overall service life of the device.

[0019] The detection unit 3 is provided with a limit structure 7, the limit structure 7 is fixedly arranged on the bottom side of the fixed bracket 5, the limit structure 7 is provided with a guide sliding hole 71 adapted to the positioning structure 6, a plurality of limit blocks 72 are arranged on the periphery of the limit structure 7, and the outer circumferential surfaces of the plurality of limit blocks 72 are all in contact with the outer circumferential surface of the iron core 2. The limit blocks 72 are in close contact and limit cooperation with the upper end surface of the positioning fixture 1. Among them, the guide sliding hole can guide the elastic movement direction of the positioning structure, so that the positioning structure always moves in the vertical direction, avoiding the influence of the actual flatness of the pressure riveting surface on the movement direction of the positioning structure, thereby avoiding the damage to the inner wall detection contact caused by the deviation movement of the positioning structure. The limit blocks are used to constrain the downward movement direction of the entire detection mechanism to always be along the axial direction of the rotor iron core, and the bottom surface thereof is always lower than the bottom surface of the positioning structure. When the detection mechanism approaches the iron core, the downward movement trend of the entire detection mechanism is first constrained by the cooperation of the limit blocks and the outer circumferential surface of the iron core, and then repositioning is realized by the cooperation of the positioning structure and the pressure riveting protrusion on the pressure riveting surface. Finally, data collection is realized by the detection contact touching the pressure riveting surface, so as to achieve the purpose of high-precision detection of the flatness of the pressure riveting surface.

[0020] Preferably, each detection unit 3 is provided with two detection contacts 4, and the two detection contacts 4 are arranged side by side along the radial direction of the iron core 2.

[0021] The above is only the preferred embodiment of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A flatness detection device for the riveting surface of a rotor core, characterized in that: It includes a positioning fixture (1) for clamping and fixing the iron core (2) so that its riveting surface is vertically aligned with the detection mechanism. The detection mechanism is arranged to be lifted and lowered above the positioning fixture (1). A plurality of detection units (3) are arranged on the lower end surface of the detection mechanism. The multiple detection units (3) are respectively arranged corresponding to a plurality of riveting points (21) on the riveting surface. The detection unit (3) is provided with a plurality of detection contacts (4), and the multiple detection contacts (4) are symmetrically arranged with respect to the corresponding riveting points (21).

2. A rotor core riveting surface flatness detection device according to claim 1, characterized in that: The detection contact (4) is a contact displacement sensor, and the multiple detection contacts (4) are fixedly connected to the output end of the lifting drive mechanism through a fixed bracket (5).

3. A rotor core riveting surface flatness detection device according to claim 2, characterized in that: The detection unit (3) is provided with a positioning structure (6). A positioning hole (61) is arranged at the center of the bottom surface of the positioning structure (6). The positioning hole (61) is sleeved and matched with the protrusion of the riveting point (21). The positioning structure (6) is provided with a plurality of through holes (62), and the multiple detection contacts (4) are correspondingly inserted and matched with the multiple through holes (62).

4. A rotor core riveting surface flatness detection device according to claim 3, characterized in that: The positioning structure (6) is connected to the fixed bracket (5) through an elastic member. When the elastic member is at its original length, the detection contact (4) retracts into the through hole (62).

5. A rotor core riveting surface flatness detection device according to claim 4, characterized in that: The detection unit (3) is provided with a limiting structure (7). The limiting structure (7) is fixedly arranged on the bottom side of the fixed bracket (5). The limiting structure (7) is provided with a guiding and sliding hole (71) adapted to the positioning structure (6). A plurality of limiting blocks (72) are arranged on the periphery of the limiting structure (7). The multiple limiting blocks (72) are all in contact with the outer circular surface of the iron core (2), and the limiting blocks (72) are in close contact and limiting cooperation with the upper end surface of the positioning fixture (1).

6. The flatness detection device for the riveting surface of a rotor core according to claim 5, characterized in that: Each detection unit (3) is provided with two detection contacts (4), and the two detection contacts (4) are arranged radially along the iron core (2).

Images