Detection device for detecting press-fitting flatness of oil seal

Abstract

The utility model discloses a detection device for detecting the press-fitting flatness of an oil seal, the detection device comprises a rotating mechanism (100) and a detection mechanism (200), the rotating mechanism (100) is arranged to be a main body (110) capable of rotating around a rotating axis coaxial with the press-fitted oil seal, the detection mechanism (200) comprises a detection unit (210) installed on the main body (110), and the detection unit (210) is used for detecting the press-fitting flatness of the oil seal. Therefore, the detection unit (210) can rotate in an arc-shaped track so as to detect the surface of the oil seal. The detection unit can rotate along with the main body and carry out a large number of approximately continuous depth detection on the surface of the oil seal along the arc track, so that a large number of detection values for judging the flatness of the oil seal can be quickly obtained. The numerical value of the etching area is obviously abnormal, and the abnormal numerical value can be screened out from the depth detection result to serve as an invalid numerical value which is not used for judging the flatness, so that the detection accuracy of the flatness of the oil seal can be obviously improved according to a large number of continuous effective detection numerical values.

Description

Technical Field

[0001] The present application relates to the field of mechanical assembly, and more specifically, to a detection device for detecting the flatness of oil seal press-fitting. Background Art

[0002] When the front and rear oil seals of the engine are press-fitted, the press-fitting quality needs to be tested. For example, the flatness of the press-fitted oil seal needs to be tested. Specifically, the prior art usually adopts a three-point measurement method, using a contact sensor or a laser displacement sensor to measure the distance from the measurement reference position to three points evenly distributed on the surface of the oil seal, and by comparing the measured values ​​of the three points, it is determined whether the flatness is within the qualified range.

[0003] Since the traceability information of the oil seal is recorded on the surface of the oil seal by etching and other methods, if the measuring point is located in the etching area during three-point measurement, the measured value will be abnormal, resulting in misjudgment of the detection. Therefore, it is necessary to manually adjust the position of the oil seal to make the measuring point avoid the etching area, which makes the operation cumbersome, time-consuming and labor-intensive.

[0004] Therefore, how to improve the detection efficiency and accuracy of the oil seal press-fit flatness becomes a technical problem that needs to be solved in this application. Utility Model Content

[0005] In view of this, the present application proposes a detection device for detecting the flatness of oil seal press-fitting, so as to quickly and accurately detect the flatness of oil seal press-fitting.

[0006] The present application provides a detection device for detecting the flatness of an oil seal press-fitted, wherein the detection device comprises a rotating mechanism and a detection mechanism, wherein the rotating mechanism is configured as a main body capable of rotating around a rotation axis coaxial with the press-fitted oil seal, and the detection mechanism comprises a detection unit mounted on the main body so that the detection unit can rotate in an arc trajectory, thereby detecting the surface of the oil seal.

[0007] Optionally, the rotating mechanism includes a driving part that drives the main body to rotate.

[0008] Optionally, the detection device includes a frame, and the rotating mechanism is mounted on the frame.

[0009] Optionally, the frame includes a base portion and a mounting portion capable of adjusting a position relative to the base portion in a plane perpendicular to the rotation axis, and the rotating mechanism is mounted on the mounting portion.

[0010] Optionally, the base portion and the mounting portion are respectively mounted with a first screw and a second screw perpendicular to each other, and the detection device comprises a push-pull block, which respectively forms a screw-nut mechanism with the first screw and the second screw.

[0011] Optionally, the detection mechanism includes a drag chain assembly for the detection unit, and the drag chain assembly is installed on the frame.

[0012] Optionally, the detection mechanism includes at least two detection units.

[0013] Optionally, the arc trajectory radii of at least two of the detection units are different.

[0014] Optionally, the detection unit is adjustably mounted on the main body so as to be able to adjust the radius of the arc track.

[0015] Optionally, the detection device comprises a processing unit for obtaining the flatness of the oil seal according to feedback from the detection unit.

[0016] According to the technical solution of the present application, the detection unit can rotate with the main body and perform a large number of approximately continuous depth detections on the surface of the oil seal along an arc track, so that a large number of detection values ​​for judging the flatness of the oil seal can be quickly obtained. Since the values ​​in the etched area are obviously abnormal, the abnormal values ​​can be screened out from the depth detection results as invalid values ​​that are not used to judge the flatness. Therefore, based on a large number of continuous valid detection values, the detection accuracy of the flatness of the oil seal can be significantly improved.

[0017] Other features and advantages of the present application will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings constituting a part of the present application are used to provide a further understanding of the present application, and the schematic implementation modes and descriptions of the present application are used to explain the present application. In the accompanying drawings:

[0019] Figure 1 It is a stereoscopic diagram of a detection device according to a preferred embodiment of the present application;

[0020] Figure 2 for Figure 1 A three-dimensional view of the detection device from another angle, omitting the base of the frame;

[0021] Figure 3 For illustration Figure 2 Partial schematic diagram of the structure at the middle adjustment block. DETAILED DESCRIPTION

[0022] The technical solution of the present application will be described in detail below with reference to the accompanying drawings and in combination with the implementation modes.

[0023] The present application provides a detection device for detecting the flatness of an oil seal press-fitted, wherein the detection device comprises a rotating mechanism 100 and a detection mechanism 200, wherein the rotating mechanism 100 is configured as a main body 110 that can rotate around a rotation axis coaxial with the press-fitted oil seal, and the detection mechanism 200 comprises a detection unit 210 mounted on the main body 110, so that the detection unit 210 can rotate in an arc trajectory, thereby detecting the surface of the oil seal.

[0024] Using the detection device of the present application, such as Figure 1 and Figure 2 As shown, the detection unit 210 can rotate with the main body 110 and perform a large number of approximately continuous depth detections on the surface of the oil seal P along an arc track, so that a large number of detection values ​​for judging the flatness of the oil seal can be quickly obtained. Since the values ​​of the etched area are obviously abnormal, the abnormal values ​​can be screened out from the depth detection results as invalid values ​​that are not used to judge the flatness. Therefore, based on a large number of continuous valid detection values, the detection accuracy of the flatness of the oil seal can be significantly improved.

[0025] The rotation angle of the main body 110 can be controlled so that the detection unit 210 can obtain a large number of detection values ​​within an arc range of a corresponding angle on the surface of the oil seal P. Preferably, the detection unit 210 can be rotated along with the main body 110 for one circle, that is, the movement track of the detection unit 210 is circular, so that the detection is performed along the corresponding complete circumference on the surface of the oil seal P, thereby obtaining a detection value that can fully reflect the flatness of the oil seal.

[0026] By setting the detection time interval of the detection unit 210, the efficiency of detection and the need for detection quantity can be taken into account. Preferably, the detection time interval of the detection unit 210 can be set according to the rotation speed of the main body 110. For example, the main body 110 can rotate at a constant speed of 8° / s-12° / s, so that the detection unit 210 can perform detection at a time interval of about 5ms, thereby obtaining more than 50 detection values ​​when the main body 110 rotates one circle.

[0027] In order to rotate the main body 110 around the rotation axis, the rotation mechanism 100 may include a driving unit 120 for driving the main body 110 to rotate. To facilitate subsequent data processing, it is preferred that the main body 110 rotates at a set speed at a constant speed. The driving unit 120 may be in an appropriate form to meet the requirement of constant speed rotation and is preferably in a form capable of adjusting the rotation speed. For example, the driving unit 120 may be a servo motor, a swing cylinder, etc.

[0028] For ease of installation, the detection device includes a frame 300, and the rotating mechanism 100 is installed on the frame 300. The frame 300 can be fixed on an appropriate mounting base so that the rotation axis of the main body 110 is coaxially arranged with the oil seal after press-fitting. For example, the frame 300 can have the same mounting base as the pressing head of the press-fit oil seal (for example, it can be installed on the frame of the press-fitting device through a slide).

[0029] Preferably, if Figure 1 and Figure 2 As shown, the frame 300 may include a base portion 310 and a mounting portion 320 capable of adjusting a position relative to the base portion 310 in a plane perpendicular to the rotation axis, and the rotating mechanism 100 is mounted on the mounting portion 320. Thus, when the rotation axis of the main body 110 is not coaxial with the oil seal due to press fitting or installation error, the position of the mounting portion 320 relative to the base portion 310 can be adjusted to ensure that the rotation axis of the main body 110 is coaxial with the oil seal.

[0030] The mounting portion 320 can be adjusted in position by an appropriate method. Figure 3 As shown, the base part 310 and the mounting part 320 are respectively mounted with a first screw rod 500 and a second screw rod 600 perpendicular to each other, and the detection device includes a push-pull block 400, and the push-pull block 400 forms a screw-nut mechanism with the first screw rod 500 and the second screw rod 600. The push-pull block 400 forms a screw-nut mechanism with the first screw rod 500 and the second screw rod 600, so that it can move along the first screw rod 500 and the second screw rod 600. By adjusting the position of the push-pull block 400 on the first screw rod 500 and the second screw rod 600, the position of the mounting part 320 relative to the base part 310 can be changed to ensure that the rotation axis of the main body 110 is coaxial with the oil seal.

[0031] In order to facilitate the provision of cables to the detection unit 210 that rotates with the main body 110, preferably, the detection mechanism 200 includes a drag chain assembly 220 for the detection unit 210, and the drag chain assembly 220 is installed on the frame 300. Specifically, as Figure 1 As shown, the drag chain assembly 220 may include a drag chain 221 , a drag chain bracket 222 and a connecting frame 223 , and the drag chain bracket 222 is fixed to the mounting portion 320 via the connecting frame 223 .

[0032] In addition, the detection mechanism 200 may include at least two detection units 210. By providing a plurality of detection units 210, the rotation angle of the main body 110 can be reduced while maintaining the same detection value, thereby obtaining a large number of detection values ​​more quickly. For example, the detection mechanism 200 may include two detection units 210, and the two detection units 210 are symmetrically arranged about the rotation axis, so that the main body 110 only needs to rotate 180° to complete a round of detection on the surface of the oil seal P through the two detection units 210.

[0033] In addition, by providing multiple detection units 210 , oil seals P of different specifications can be detected. Specifically, the arc trajectory radii of at least two detection units 210 can be different, so that oil seals P of corresponding specifications can be detected by different detection units 210 .

[0034] In addition, the detection unit 210 may be adjustably mounted on the main body 110 so as to be able to adjust the radius of the arc track so as to be suitable for the detection of oil seals P of different specifications. Specifically, one of the main body 110 and the detection unit 210 may be provided with a long hole or a plurality of mounting holes, and the other may be provided with an assembly hole, so that the detection unit 210 is mounted on the main body 110 by aligning the assembly hole with different positions of the long hole or a certain mounting hole and using fasteners. By selecting different positions of the long hole or selecting the mounting hole, the installation position of the detection unit 210 can be adjusted, that is, the radius of the arc track can be adjusted.

[0035] In the present application, the detection unit 210 may be in an appropriate form. For example, the detection unit 210 may include a laser ranging sensor, a mechanical contact ranging sensor, etc.

[0036] In addition, in order to obtain the flatness test result according to the detection value, the detection device includes a processing unit for obtaining the flatness of the oil seal according to the feedback of the detection unit 210. The processing unit can be in an appropriate form, for example, it can include a PLC. In addition, the processing unit can be configured to screen the detection values ​​of the detection unit 210 to remove invalid values ​​of the etching area. For example, the processing unit can summarize and organize the obtained detection values ​​into a data curve (the horizontal axis is the rotation angle, and the vertical axis is the detection depth value). Through analysis, the detection value A with the largest change in the detection value can be determined. When the detection value is within a certain range near A, it is regarded as an invalid value. After the invalid values ​​are screened out, the remaining valid values ​​are summarized and averaged to obtain the flatness of the oil seal.

[0037] The preferred embodiments of the present application are described in detail above; however, the present application is not limited to the specific details in the above embodiments. Within the technical concept of the present application, a variety of simple modifications can be made to the technical solution of the present application, and these simple modifications all fall within the protection scope of the present application.

[0038] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, this application will not further describe various possible combinations.

[0039] In addition, the various implementation modes of the present application may be arbitrarily combined, and as long as they do not violate the concept of the present application, they should also be regarded as the contents disclosed in the present application.

Claims

1. A detection device for detecting the flatness of oil seal press-fitting, characterized in that: The detection device comprises a rotating mechanism (100) and a detection mechanism (200), wherein the rotating mechanism (100) is configured as a main body (110) that can rotate around a rotation axis coaxial with a press-fitted oil seal, and the detection mechanism (200) comprises a detection unit (210) mounted on the main body (110), so that the detection unit (210) can rotate in an arc trajectory, thereby detecting the surface of the oil seal.

2. The detection device for detecting the flatness of oil seal press-fitting according to claim 1, characterized in that: The rotating mechanism (100) comprises a driving part (120) for driving the main body (110) to rotate.

3. The detection device for detecting the flatness of oil seal press-fitting according to claim 1, characterized in that: The detection device comprises a frame (300), and the rotating mechanism (100) is installed on the frame (300).

4. The detection device for detecting the flatness of oil seal press-fitting according to claim 3, characterized in that: The frame (300) comprises a base portion (310) and a mounting portion (320) capable of adjusting a position relative to the base portion (310) in a plane perpendicular to the rotation axis, and the rotation mechanism (100) is mounted on the mounting portion (320).

5. The detection device for detecting the flatness of oil seal press-fitting according to claim 4, characterized in that: The base portion (310) and the mounting portion (320) are respectively mounted with a first screw rod (500) and a second screw rod (600) which are perpendicular to each other. The detection device comprises a push-pull block (400). The push-pull block (400) forms a screw-nut mechanism with the first screw rod (500) and the second screw rod (600).

6. The detection device for detecting the flatness of oil seal press-fitting according to claim 3, characterized in that: The detection mechanism (200) comprises a drag chain assembly (220) for the detection unit (210), and the drag chain assembly (220) is installed on the frame (300).

7. The detection device for detecting the flatness of oil seal press-fitting according to claim 1, characterized in that: The detection mechanism (200) comprises at least two detection units (210).

8. The detection device for detecting the flatness of oil seal press-fitting according to claim 7, characterized in that: The arc-shaped trajectory radii of at least two of the detection units (210) are different.

9. The detection device for detecting the flatness of oil seal press-fitting according to any one of claims 1 to 8, characterized in that: The detection unit (210) is adjustably mounted on the main body (110) so as to be able to adjust the radius of the arc track.

10. The detection device for detecting the flatness of oil seal press-fitting according to any one of claims 1 to 8, characterized in that: The detection device comprises a processing unit for obtaining the flatness of the oil seal according to feedback from the detection unit (210).

Images