CN115217851A - Low-cost creep-resistant bearing and surface flatness detection system thereof - Google Patents

Abstract

The invention discloses a low-cost anti-creep bearing and a surface flatness detection system thereof. The coating is made of high temperature rubber material; the thickness of the coating is reduced from the axial center position of the outer ring to the two ends, and the coating also covers the rounded corners at both ends of the outer ring. Among them, the surface flatness detection system is matched with the quality inspection of the coating, which can cooperate with the camera to capture the image, and cooperate with the flatness of the coating for image recognition. The production quality can be ensured through the surface flatness inspection system.

Description

Low-cost creep bearing and its surface flatness detection system

technical field

The present invention relates to a low-cost creep-resistant bearing and a surface flatness detection system thereof.

Background technique

At present, in order to achieve the lightweight goal of automobiles, the electric box of new energy vehicles generally adopts the thin-walled shell design. The rigidity of the thin-walled shell is reduced, and the deformation amount affected by the temperature is inconsistent due to the different thermal expansion coefficients of the bearing material and the shell material. Due to thermal deformation between the bearing mating surfaces, there may be gaps for relative sliding, creep between the mating surfaces, and wear of the housing. At present, in order to prevent creep, there are existing bearing products with O-rings on the outer ring and bearing products coated with anti-wear agent on the outer surface of the bearing. The former will reduce the strength of the ferrule, and in the actual use process, the O-ring has fallen off. The surface of the latter is sprayed with a solid lubricating film, which is expensive and uneconomical. The same former will also generate higher costs during processing, so it is not economical in actual use.

SUMMARY OF THE INVENTION

In view of the deficiencies in the prior art, the purpose of the present invention is to provide a low-cost creep-resistant bearing and a surface flatness detection system thereof, which can maintain high strength and prevent creep at low cost.

In order to achieve the above object, the present invention provides the following technical solution: a low-cost creep-resistant bearing, comprising an outer ring, an inner ring, and rolling elements arranged between the outer ring and the inner ring, and the outer surface of the outer ring is provided with There is an encapsulation made of high temperature resistant rubber material; the thickness of the encapsulation is set to decrease from the axial center position of the outer ring to both ends, and the encapsulation also covers the rounded corners at both ends of the outer ring.

As a further improvement of the present invention, the outer surface of the outer ring is a blank surface.

As a further improvement of the present invention, the axial center position of the outer ring is concave downward, and the encapsulation simultaneously fills the concave portion.

As a further improvement of the present invention, a plurality of annular grooves are formed on the surface of the rubber encapsulation along the circumferential direction of the outer ring.

As a further improvement of the present invention, the number of the grooves is two, and the grooves are symmetrically distributed on both sides of the axial center position of the outer ring near the position where the center of the encapsulation is raised.

As a further improvement of the present invention, the truncated surface of the groove is arc-shaped, and the connection with the rubber-coated surface has an arc-shaped transition.

As a further improvement of the present invention, the surface of the encapsulation is provided with a plurality of circular-shaped grooves.

There is also provided a surface flatness detection system matching with the anti-creep bearing, including the aforementioned low-cost anti-creep bearing, a camera for capturing the image of the edge of the outer ring of the anti-creep bearing, a controller connected with the camera, and a camera. It is used to install the rotating base of the anti-creep bearing; the rotating base is connected with the inner ring of the anti-creep bearing by interference, and the camera is set at the position where the edge of the outer ring of the anti-creep bearing is covered with rubber to capture the outer ring of the anti-creep bearing in the rotating state. The image change of the rubber edge of the ring; the controller obtains the image captured by the camera and superimposes the image and obtains the maximum change interval of the rubber edge of the outer ring; the controller is provided with a maximum offset value, and the controller obtains The superimposed image and obtain the position where the edge-coated image overlaps the most as the reference line, and at the same time obtain the position where the edge-coated image shifts the most to both sides and compare it with the reference line to obtain the offset, if the offset exceeds the preset value The maximum offset value is judged as unqualified, otherwise it is judged as qualified.

As a further improvement of the present invention, the controller determines whether the image overlaps the most in an interval when the edge-encapsulated image overlaps the most, and the line at the center of the image overlap serves as the reference line.

As a further improvement of the present invention, the camera obtains and superimposes the rubber-encapsulated images of the edge of the outer ring of the anti-creep bearing through intervals.

Beneficial effects of the present invention:

1. Low cost, has the effect of compensating for the deformation caused by heat treatment, and can avoid the problem of creep caused by slippage between the assembly and the outer ring.

2. Compared with the O-ring solution in the prior art, the strength of the outer ring will not be reduced.

Description of drawings

Fig. 1 is the sectional structure schematic diagram of the present invention;

FIG. 2 is an enlarged schematic view of a part of the structure of the embodiment of the present invention with a recess;

3 is an enlarged schematic diagram of a part of the structure of the embodiment of the present invention with a groove;

FIG. 4 is a schematic structural diagram of the detection system of the present invention.

Reference numerals: 1, outer ring; 2, inner ring; 3, rolling body; 4, encapsulation; 5, depression; 6, groove; 7, camera; 8, controller; 9, rotating base.

Detailed ways

The present invention will be further described in detail below with reference to the embodiments given in the accompanying drawings.

Referring to Figure 1-4,

A low-cost creep-resistant bearing, comprising an outer ring 1, an inner ring 2, a rolling element 3 arranged between the outer ring 1 and the inner ring 2, and the outer surface of the outer ring 1 is provided with a high temperature resistant rubber material. Rubber covering 4; the thickness of the rubber covering 4 is set to decrease from the axial center position of the outer ring 1 to both ends, and the rubber covering 4 also covers the rounded corners at both ends of the outer ring 1 .

The creep of the bearing outer ring 1 is generally caused by the deformation of the outer ring 1 due to the temperature problem, and the gap between the bearing and the mating surface of the assembly occurs, resulting in slippage and creep. In this solution, the outer surface of the outer ring 1 is covered with rubber 4 and a high temperature resistant rubber material is used, so that the influence of high temperature can be avoided. In the case of high temperature, the outer ring 1 is deformed. At this time, when there is a gap between the mating surface of the outer ring 1 and the assembly, it can be filled with the rubber 4 to meet the interference requirement and avoid the phenomenon of slipping and creep, and Under this structure, the thickness of the encapsulation 4 becomes smaller from the middle to the two sides, that is, the middle is the largest thickness, which facilitates the assembly of the bearing and reduces the resistance during installation. When it is subjected to excessive resistance, it may cause the rubber 4 to fall off, and the thickness of both sides is reduced during installation, which can provide a deformation space with a larger thickness in the middle, so that the part with a larger thickness can be deformed to both sides during assembly. The part that can be squeezed and deformed can increase the contact area between the contact rubber 4 and the assembly, and improve the friction effect. And compared with the prior art, the outer ring 1 will not be cut, so as to avoid reducing the strength of the outer ring 1 . The rubber covering 4 also covers the rounded corners at both ends of the outer ring 1 , which can further improve the stability during installation and reduce the probability of the rubber covering 4 falling off during the installation process.

In addition, the outer surface of the outer ring 1 of the present application can directly use the blank, and does not need to be finished. The adhesion of the lagging 4 can also improve the coating stability of the lagging 4 .

In a further arrangement, the axial center position of the outer ring 1 is concave 5 downward, and the encapsulation 4 fills the concave 5 at the same time.

Optionally, if the strength requirements of the outer ring 1 are not very high, this setting can be adopted. By setting a depression 5 in the center of the outer ring 1, and using the depression 5 to increase the amount of rubber 4, on the one hand, the bearing can be provided during the assembly process. The deformation accommodating space of the rubber lagging 4 can be squeezed into the depression 5 when the rubber lagging 4 is squeezed and deformed, so as to reduce the overflow of the rubber lagging 4, and can temporarily store the rubber lagging 4 to provide sufficient gap filling effect.

In another optional manner, a plurality of annular grooves 6 are formed on the surface of the rubber encapsulation 4 along the circumferential direction of the outer ring 1 . The plurality of annular grooves 6 can prevent the rubber 4 from overflowing from both ends of the outer ring 1 due to the deformation transition during the extrusion deformation process, and the deformed part can be used to fit the mating surface of the assembly. Further, the number of the grooves 6 is two, and the grooves 6 are symmetrically distributed on both sides of the axial center position of the outer ring 1 near the position where the center of the rubber lagging 4 is raised. Slotting on the two sides enables the rubber 4 at the center to fill the grooves 6 on both sides during the extrusion deformation process, and the deformation at the position with the largest thickness in the center fills the position of the grooves 6, which can Let the filling effect of the lagging 4 and the gap be in a position close to the center, and make full use of the central position where the thickness of the lagging 4 is larger to perform interference. In addition, preferably, the sectional surface of the groove 6 is arc-shaped, and the connection with the surface of the encapsulation 4 has an arc-shaped transition. This setting can make the strength transition of the rubber 4 more uniform, avoid rapid damage or breakage of the rubber 4 after being squeezed, and improve the service life.

In another optional manner, the surface of the rubber encapsulation 4 is provided with a plurality of circular grooves. Similarly, it is also selected for the case where the strength requirements are not high. The ball-shaped groove can provide the limiting effect in all directions. When the rubber lagging 4 is filled into the groove, it can make the rubber lagging 4 have the axial and circumferential limiting effect, and reduce the impact of the bearing during the working process of the bearing. Offset of glue 4.

In combination with the above-mentioned creep-resistant bearing structure, it is also necessary to detect the quality of the rubber 4. The following also provides a low-cost creep-resistant bearing surface flatness detection system, including the aforementioned creep-resistant bearing, A camera 7 for capturing an image of the edge of the anti-creep bearing outer ring 1 with rubber, a controller 8 connected to the camera 7, and a rotating base 9 for installing the anti-creep bearing; the rotating base 9 is connected to the anti-creep bearing. The inner ring 2 is connected by interference, and the camera 7 is arranged at the position of the rubber 4 on the edge of the outer ring 1 of the anti-creep bearing to capture the image change of the rubber 4 on the edge of the outer ring 1 in the rotating state; the controller 8 obtains The image captured by the camera 7 and the superimposed image are obtained to obtain the maximum change interval of the edge coating 4 of the outer ring 1; the controller 8 is provided with a maximum offset value, and the controller 8 obtains the superimposed image and obtains the edge coating. The position where the image overlaps the most is used as the reference line, and at the same time, the position where the edge-encapsulated image deviates the most to both sides is obtained and compared with the reference line to obtain the offset. If the offset exceeds the preset maximum offset value, it is judged It is unqualified, otherwise it is judged as qualified.

In this solution, after the anti-creep bearing is installed on the base, by rotating the outer ring 1 and cooperating with the camera 7 to capture the changing image of the thickness of the encapsulation 4 (that is, the image of the edge of the outer ring 1 encapsulated), and cooperate with the controller 8. Analyze the rubber-encapsulated image of the edge of the outer ring 1. First, obtain the rubber-encapsulated image of the edge of the outer ring 1 during the rotation process with a certain number of frames (that is, obtain the rubber-encapsulated image of the edge of the creep-resistant bearing outer ring 1 at intervals). The obtained photos are overlapped. During the overlapping process, the position where the edge line overlaps the most is obtained as the reference line, and the reference line is compared to both sides to obtain the offset of the largest edge line and compare it with the reference line to determine the offset Whether the amount exceeds the preset maximum offset value, if it exceeds, it is judged as unqualified, and needs to be re-packaged 4. Based on this detection, the effect of the encapsulation 4 can be controlled, and it can be ensured that the outer ring 1 can provide sufficient filling when the outer ring 1 is deformed in various places during installation, so as to avoid the problem of slippage due to insufficient filling in some positions.

Preferably, the controller 8 determines whether the image overlaps the most in an interval when the edge-encapsulated image overlaps the most, and the line at the center of the image overlap is used as the reference line.

Using the interval unit to obtain the most overlapping method of edge encapsulation images can be analyzed more quickly, and the speed of obtaining overlapping lines is faster.

The above are only the preferred embodiments of the present invention, and the protection scope of the present invention is not limited to the above-mentioned embodiments, and all technical solutions under the idea of the present invention belong to the protection scope of the present invention. It should be pointed out that for those skilled in the art, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims (10)

1. A low-cost creep-resistant bearing, comprising an outer ring, an inner ring, and a rolling element arranged between the outer ring and the inner ring, characterized in that the outer surface of the outer ring is provided with a bag made of high-temperature resistant rubber material. Glue; the thickness of the encapsulation decreases from the axial center position of the outer ring toward both ends, and the encapsulation also covers the rounded corners at both ends of the outer ring. 2 . The low-cost creep-resistant bearing of claim 1 , wherein the outer surface of the outer ring is a blank surface. 3 . 3 . The low-cost creep-resistant bearing according to claim 1 , wherein the axial center position of the outer ring is recessed downward, and the encapsulation simultaneously fills the recessed portion. 4 . 4 . The low-cost anti-creep bearing according to claim 1 , wherein a plurality of annular grooves are formed on the surface of the rubber encapsulation along the circumferential direction of the outer ring. 5 . 5. The low-cost anti-creep bearing according to claim 4, wherein the number of the grooves is two, and the grooves are symmetrically distributed on both sides of the axial center position of the outer ring, close to the convex center of the encapsulation. Location. 6 . The low-cost anti-creep bearing according to claim 4 , wherein the sectional surface of the groove is arc-shaped, and the connection with the rubber-coated surface has an arc-shaped transition. 7 . 7 . The low-cost anti-creep bearing according to claim 1 , wherein the surface of the rubber encapsulation is provided with a plurality of circular-shaped grooves. 8 . 8. A surface flatness detection system for a low-cost creep-resistant bearing, characterized in that it comprises the low-cost creep-resistant bearing according to any one of claims 1 to 6, which is used to capture the outer ring of the creep-resistant bearing. A camera with an edge-coated image, a controller connected with the camera, and a rotating base for installing the anti-creep bearing; the rotating base is connected with the inner ring of the anti-creep bearing by interference, and the camera is arranged on the anti-creep bearing The position of the outer edge of the outer ring is covered with rubber to capture the image change of the outer ring edge rubber in the rotating state; the controller obtains the image captured by the camera and superimposes the image and obtains the maximum change interval of the outer ring edge rubber; the control The maximum offset value is set in the controller, and the controller obtains the superimposed image and obtains the position where the edge-encapsulated image overlaps the most as the reference line, and at the same time obtains the position where the edge-encapsulated image deviates the most to both sides and matches the reference line. The offset is obtained by line comparison. If the offset exceeds the preset maximum offset value, it is judged as unqualified, otherwise it is judged as qualified. 9 . The surface flatness detection system according to claim 8 , wherein the controller judges whether the image overlaps the most in units of intervals when the edge-encapsulated image overlaps the most, and the image overlaps the most. 10 . The line at the center is used as the reference line. 10 . The surface flatness detection system according to claim 8 , wherein the camera obtains and superimposes images of the edge of the outer ring of the anti-creep bearing with glue through intervals. 11 .

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