FR2633679A1 - Rolling-contact bearing including at least one split race and an assembly linkage - Google Patents

Abstract

Rolling-contact bearing of the type including at least one split race and an assembly linkage, characterised in that the linkage consists of a film of adhesive of calibrated thickness which is less than 60 microns located between those parts of the race in contact with the ground surfaces whose roughness Ra lies between 0.2 and 0.5 microns.

Description

 recess comprising at least one split ring and an assembly link.

 The invention relates to a bearing comprising at the molns a split ring and an assembly connection.

 With a type of wheel, an assembly ring of elastic material is usually fitted into the bore of the two inner rings and / or the outer diameter of the two outer rings and allows their connection during transport and handling operations before assembly. . This assembly ring is generally driven to assembly when iem- nagement of the inner rings on a shaft or outer rings in a bore. During the dismantling of the bearing.

during a maintenance intervention, the two inner jowls are disconnected. This results in a risk of mixing of the parts as well as a possibility of pollution of the internal parts of the bearing.

 The use of elastic clips may also require additional machining operations unrelated to the proper operation of the bearing.

The dimensional differentiation of the bearings also requires the realization of series of assembly parts, quantitative management and recycling measures
The object of the invention is to overcome these disadvantages. It therefore relates to a connection of the inner and / or outer rings integrated in the bearing in order to make the bearing elements inseparable during transport, handling, assembly and disassembly, that is to say during the entire life of the bearing.

 The subject of the invention is also a fusible connection of the inner and / or outer rings, in particular under the effect of forces generated by percussions or shocks in order to visually detect the bearings that are unfit for use.

According to the invention, the bond is constituted by a glue film with a thickness of less than 60 microns located between the two parts of the ring in contact with the ground surfaces of roughness between 0.2 and 0.5 micron. In the bearing thus assembled the connection of the elements of the ring can be ensured for mic efforts in play during transport. The bonding will advantageously employ anaerobic type, cyanoacrylate or instant adhesive adhesives, known by their mechanical characteristics:
- tensile strength up to 45 N / mm2
- admissible temperure - 55u to + 125 C
- impact resistance up to 3.5 Nm / mm
- shear strength up to 25 N / mm
Other features and advantages of the invention will be apparent from a reading of the description made with reference to the accompanying drawings in which FIGS. 1 to 10 are diagrammatic representations of bearings showing various arrangements of rings and rolling bodies which make application of a bond glued between two parts of a same ring.

 Figure 10 is a schematic representation of the assembly process $ of a bearing ring as illustrated in Figures 3, 7.

 The bearing in FIG. 1 is a bearing E, a row of balls (1) arranged between an outer ring (2) and an inner ring (Z) in two parts (3a, 3b), united by a bonded connection.

 According to Figure 2, the inner ring (4) is contiguous to a plate (5 glued shoulder forming the roll row ^: (6).

 5Elon Figure Z two rows of angular contact balls (7, 7 ') are disposed between an outer ring (8) and an inner ring (9) in two parts (9a, 9b).

 According to FIGS. 4 and 5, two bearings (10, 11, 12, and 13) with a row of rolling bodies are secured by means of a bonded connection in order to form a bearing composed of two inner and outer rings stuck together. one of their flanks.

 Figures 6 and 7 show rolling bearings with two rows of rolling bodies whose inner rings (14) are in two parts (14a, 14b) and (15a, 15b) applying a glued connection.

 Figures 8 and 9 show bearings with rings separated by spacers (16, 17, 18, 19) providing the bonded connection connection between the outer and inner rings of the bearings.

 FIG. 10 illustrates the assembly process of parts of a ring such as the ring (9) of FIG. Z. The adhesive film is deposited on the lateral face of an element (9a) of the placed ring. in the environment where the difference in temperature and relative humidity remains substantially constant.

The previously ground surface has a roughness Ra of between 0.2 and 0.5 microns and a cleanliness of between 50 and 100 mg / m
The glue is deposited by one of the known methods such as screen printing, applicator, roller or binder added. where appropriate. a polymerization activator.

A film is glue of thickness calibrated between 0 and 60 microns such that it can fill the gap between included roughness of the contact surfaces.

 The pre-positioned rings are applied by means of centering studs 20 to a contact pressure. This pressure is maintained for a period of about 10 seconds depending on the glue used. The usual pressures vary between 1 N / cm A 1500 Nirm2 depending on the type of glue.

Claims (2)

 CLAIM  l) Roui ement of the type bearing at least one split ring and an assembly link. characterized in that the connection is constituted by a glue film of calibrated thickness lower than microns located between the parts of the ring in contact with corrected surfaces of roughness Ra between 0.2 and 0.5 micron.  2) A method of making the connection according to claim 1, characterized in that the subject of the glue film is deposited on a part. if necessary, the action of a polymerization activator before application by the other part of the bonding pressure under substantially constant temperature and hygrometry conditions.